RC 22 RCA Receiving Tube Manual Jul63
1963_RC-22_RCA_Receiving_Tube_Manual 1963_RC-22_RCA_Receiving_Tube_Manual
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Technlca. Serle. RC-22
Sunesled
Pr ice
RCA
MANUAL
RADIO CORPORATION OF AMERICA
ELECTRONIC COMPONENTS AND DEVICES • HARRISON. N. J.
Contents
PAGE
ELECTRONS, ELECTRODES, AND ELECTRON TUBES
Electrons, Cathodes, Generic Tube Types, Diodes, Triodes, Tetrodes,
Pentodes, Beam Power Tubes, Multi-Electrode and Multi-Unit Types,
Receiving Tube Structure, Television Picture Tubes
ELECTRON TUBE CHARACTERISTICS
3
12
"
ELECTRON TUBE ApPLICATIONS
Amplification, Rectification, Detection, Automatic Volume or Gain
Control, Tuning Indication with Electron-Ray Tubes, Oscillation, Deflection Circuits, Frequency Conversion, Automatic Frequency Control
14
ELECTRON TUBE INSTALLATION
Filament and Heater Power Supply, Heater-to-Cathode Connection,
Plate Voltage Supply, Grid Voltage Supply, Screen-Grid Voltage Supply,
Shielding, Dress of Circuit Leads, Filters, Output-Coupling Devices,
High-Fidelity Systems, High-Voltage Considerations for Television
Picture Tubes, Picture-Tube Safety Considerations
58
INTERPRETATION OF TUBE DATA
69
ApPLICATION GUIDE FOR RCA RECEIVING TUBES
75
TECHNICAL DATA FOR RCA TUBE TYPES
83
PICTURE-TUBE CHARACTERISTICS CHART
484
ELECTRON TUBE TESTING
487
RESISTANCE-COUPLED AMPLIFIERS
491
OUTLINES
500
CIRCUITS
504
INDEX
536
READING LIST
544
Information furnished by RCA is believed to be accurate and reliable. However, no responsibility is
assumed by RCA for its use; nor for any infringements of patents or other rights of third parties which
may result from its use. No license is granted by implication or otherwise under any patent or patent
rights of RCA.
Copyright 1963 by Radio Corporation of America (All Rights Reserved)
Q
~®
Trade Mark(s) Registered
Marca(s) Registrada(s)
7-63
Printed in U. S. A.
RCA
Receiving Tube Manual
THIS MANUAL, like its preceding editions, has
been prepared to assist those who work or experiment with home-entertainment-type electron tubes
and circuits. It will be found valuable by engineers,
service technicians, educators, experimenters, radio
amateurs, hobbyists, students, and many others
technically interested in electron tubes.
The material in this edition has been augmented
and revised to include the recent technological
advances in the electronics field. Many tube types
widely used in the design of new electronic equipment only a few years ago are now chiefly of interest
for renewal purposes. Consequently, in the Tube
Types Section, information on many older types is
limited to basic essential data; information on newer
and more important types is given in greater detail.
RADIO CORPORATION OF AMERICA
ELECTRONIC COMPONENTS AND DEVICES
HARRISON,
N. J.
CERAMIC
BASE WAFER
---mH~~.....",.,..-
INDEXING
LUGS - -
2
Electrons, Electrodes,
and Electron Tubes
The electron tube is a marvelous
device. It makes possible the performing
of operations, amazing in conception,
with a precision and a certainty that are
astounding. It is an exceedingly sensitive and accurate instrument-the product of coordinated efforts of engineers
and craftsmen. Its construction requires
materials from every corner of the earth.
Its use is world-wide. Its future possibilities, even in the light of present-day
accomplishments, are but dimly foreseen, for each development opens new
fields of design and application.
The importance of the electron tube
lies in its ability to control almost instantly the flight of the millions of electrons supplied by the cathode. It accomplishes this control with a minimum of
energy. Because it is almost instantaneous in its action, the electron tube can
operate efficiently and accurately at
electrical frequencies much higher than
those attainable with rotating machines.
Electrons
All matter exists in the solid, liquid,
or gaseous state. These three forms consist entirely of minute divisions known
as molecules, which, in turn, are composed of atoms. Atoms have a nucleus
which is a positive charge of electricity,
around which revolve tiny charges of
negative electricity known as electrons.
Scientists have estimated that electrons
weigh only 1ISO-billion, billion, billion,
billionths of an ounce, and that they
may travel at speeds of thousands of
miles per second.
Electron movement may be accelerated by the addition of energy. Heat is
one form of energy which can be conveniently used to speed up the electron.
For example, if the temperature of a
metal is gradually raised, the electrons
in the metal gain velocity. When the
metal becomes hot enough, some electrons may acquire sufficient speed to
break away from the surface of the
metal. This action, which is accelerated
when the metal is heated in a vacuum,
is utilized in most electron tubes to
produce the necessary electron supply.
An electron tube consists of a cathode, which supplies electrons, and one or
more additional electrodes, which control and collect these electrons, mounted
in an evacuated envelope. The envelope
may be made of glass, metal, ceramic, or
a combination of these materials.
Cathode.
A cathode is an essential part of an
electron tube because it supplies the
electrons necessary for tube operation.
When energy in some form is applied to
the cathode, electrons are released. Heat
is thefordl ofilenergy generally used.The
method of heating the cathode may be
used to distinguish between the different
forms of cathodes. For example, a directly heated cathode, or filament-cathode, is a wire heated by the passage of
an electric current. An indirectly heated
cathode, or heater-cathode, consists of a
filament, or heater, enclosed in a metal
sleeve. The sleeve carries the electronemitting material on its outside surface
and is heated by radiation and conduction from the heater.
A filament, or directly heated cathode, such as that shown in Fig. 1 may
be further classified by identifying the
filament or electron-emitting material.
The materials in regular use are tungsten, thoriated tungsten, and metals
which have been coated with alkalineearth oxides. Tungsten filaments are
made from the pure metal. Because they
must operate at high temperatures (a
dazzling white) to emit sufficient electrons, a relatively large amount of filament power is required.
Thoriated-tungsten filaments are
made from tungsten impregnated with
thorium oxide. Due to the presence of
3
RCA Receiving Tube Manual
thorium, thete filaments liberate electrons at a more moderate temperature
of about 1700°C (a bright yellow) and
are, therefore, much more economical of
filament power than are pure tungsten
filaments.
Alkaline earths are usually applied
all a coating on a nickel-alloy wire or
ribbon. This coating, which is dried in a
relatively thick layer on the filament,
requires only a relatively low temperature of about 700-750°C (a dull red) to
produce a copious supply of electrons.
Coated filaments operate very efficiently
and require relatively little filament
power. However, each of these cathode
materials has special advantages which
determine the choice for a particular
application.
THO!)!
SI.!!VI
Fig. 1
Fig. 2
Directly heated filament-cathodes
require comparatively little heating
power. They are used in almost all of
the tube types designed for battery operation because it is, of course, desirable
to impose as small a drain as possible on
the batteries. Examples of battery-operated filament types are the 1R5, 1U4,
1U5, and BV4. AC-operated types having directly heated filament-cathodes
include the 2AB and 5YBGT.
An indirectly heated eathode, or
heater.eathode, consists of a thin metal
sleeve coated with electron-emitting material such as alkaline-earth oxides. The
emissive surface of the cathode is maintained at the required temperature (apprOximately 10500 K) by resistance-heating of a tungsten or tungsten-alloy wire
which is placed inside the cathode sleeve
and electrically insulated from it, as
shown in Fig. 2. The heater is used only
for the purpose of heating the cathode
sleeve and sleeve coating to an electronemitting temperature. Useful emission
does not take place from.the heater wire.
"
A new dark heater insulating coating developed by RCA has better heat
transfer than earlier aluminum-oxide
coatings, and makes it possible to operate
heaters at lower temperatures for given
power inputs. Because the tensile
strength of the heater wire increases at
the lower operating temperatures, tubes
using dark heater. have increased reliability, stability, and life.
The heater-cathode construction is
well adapted for use in electron tubes intended for operation from ac power lines
and from storage batteries. The use of
separate parts for emitter and heater
functions, the electrical insulation of the
heater from the emitter, and the shielding effect of the sleeve may all be utilized
in the design of the tube to minimize the
introduction of hum from the ac heater
supply and to minimize electrical interference which might enter the tube circuit through the heater-supply line.
From the viewpoint of circuit design,
the heater-cathode construction offers
advantages in connection flexibility because of the electrical separation of the
heater from the cathode.
Another advantage of the heatercathode construction is that it makes
practical the design of a rectifier tube
having close spacing between its cathode
and plate, and of an amplifier tube having close spacing between its cathode
and grid. In a close-spaced rectifier tube,
the voltage drop in the tube is low, and,
therefore, the regulation is improved. In
an amplifier tube, the close spacing increases the gain obtainable from the
tube. Because of the advantages of the
heater-cathode construction, almost all
present-day receiving tubes designed for
ac operation have heater-cathodes.
Generic Tube Types
Electrons are of no value in an electron tube unless they can be put to
work. Therefore, a tube is designed with
the parts necessary to utilize electrons
as well as those required to produce
them. These parts consist of a cathode
and one or more supplementary electrodes. The electrodes are enclosed in an
evacuated envelope having the necessary connections brought out through
air-tight seals. The air is removed from
the envelope to allow free movement of
......
:
====- Electrons, Electrodes, and Electron Tubes ====the electrons and to prevent injury to
the emitting surface of the cathode.
When the cathode is heated, electrons leave the cathode surface and form
an invisible cloud in the space around it.
Any positive electric potential within
the evacuated envelope offers a !trong
attraction to the electrons (unlike electric charges attract; like charges repel).
Such a positive electric potential can be
supplied by an anode (positive electrode) located within the tube in proximity to the cathode.
other tubes in the receiver. Rectifier
tubes having only one plate and one
cathode, such as the 35W4, are called
half-wave rectifiers, because current
can flow only during one-half of the
alternating-current cycle. When two
plates and one or more cathodes are
Diodes
The simplest form of electron tube
contains two electrodes, a cathode and
an anode (plate), and is often called a
diode, the family name for a two-electrode tube. In a diode, the positive potential is supplied by a suitable electrical
source connected between the plate
terminal and a cathode terminal, as
shown in Fig. 3. Under the influence of
PLAT£:
full-wave rectifiers.
~URRE:Nl'
OUTPut
CATH-
used in the same tube, current may be
obtained on both halves of the ac cycle.
The 6X4, 5Y3GT, and 5U4GB are examples of this type and are called
00.
Fig. 3
the positive plate potential, electrons
flow from the cathode to the plate and
return through the external plate-battery circuit to the cathode, thus completing the circuit. This flow of electrons
is known as the plate current.
If a negative potential is applied to
the plate, the free electrons in the space
surrounding the cathode will be forced
back to the cathode and no plate current will flow. If an alternating voltage
is applied to the plate, the plate is alternately made positive and negative. Because plate current flows only during the
time when the plate is positive, current
flows through the tube in only one direction and is said to be rectified. Fig. 4
shows the rectified output current produced by an alternating input voltage.
Diode rectifiers are used in ac receivers to convert the ac supply voltage
to dc voltage for the electrodes of the
Not all of the electrons emitted by
the cathode reach the plate. Some return
to the cathode while others remain in
the space between the cathode and plate
for a brief period to produce an effect
known as space charge. This charge has
a repelling action on other electrons
which leave the cathode surface and impedes their passage to the plate. The extent of this action and the amount of
space charge depend on the cathode
temperature, the distance between the
cathode and the plate, and the plate
potential. The higher the plate potential,
the less is the tendency for electrons to
remain in the space-charge region and
repel other electrons. This effect may be
noted by applying increasingly higher
plate voltages to a tube operating at a
fixed heater or filament voltage. Under
these conditions, the maximum number
of available electrons is fixed, but increasingly higher plate voltages will
succeed in attracting a greater proportion of the free electrons.
Beyond a certain plate voltage,
however, additional plate voltage has
little effect in increasing the plate current because all of the electrons emitted
5
RCA Receiving Tube Manual
by the cathode are already being drawn
to the plate. This maximum current,
illustrated in Fig. 5, is called saturation
current. Because it is an indication of
the total number of electrons emitted, it
is also known as emission current or
simply emission.
Although tubes are sometimes tested
by measurement of their emission current, it is generally not advisable to
measure the full value of emission because this value would be sufficiently
large to cause change in the tube's characteristics or even to damage the tube.
Consequently, while the test value of
emission current is somewhat larger than
Saturation Point
.......... f-
-
/
V
o
"
PLATE VOLTAGE-
Fig. Ii
the maximum current which will be required from the cathode in the use of the
tube, it is ordinarily less than the full
emission current. The emission test,
therefore, is used to indicate whether
the cathode can supply a sufficient number of electrons for satisfactory operation of the tube.
If space charge were not present to
repel electrons coming from the cathode,
the same plate current could be produced
at a lower plate voltage. One way to
make the effect of space charge small is
to make the distance between plate and
cathode small. This method is used in
rectifier types having heater-cathodes,
such as the 5V4GA and the 6AX5GT.
In these types the radial distance between cathode and plate is only about
two hundredths of an inch.
Another method of reducing spacecharge effect is utilized in mercury.
'Vapor rectifier tubes. When such tubes
are operated, a small amount of mercury
contained in the tube is partially vaporized, filling the space inside the bulb
with mercury atoms. These atoms are
6
bombarded by electrons on their way to
the plate. If the electrons are moving at
a sufficiently high speed, the collisions
tear off electrons from the mercury
atoms. The mercury atom is then said
to be "ionized," i.e., it has lost one or
more electrons and, therefore, has a
positive charge. Ionization is evidenced
by a bluish-green glow between the
cathode and plate. When ionization occurs, the space charge is neutralized by
the positive mercury atoms so that increased numbers of electrons are made
available. Mercury-vapor tubes are used
primarily for power rectifiers.
Ionic.heated·cathode rectifiers
depend on gas ionization for their operation. These tubes are of the full-wave
design and contain two anodes and a
coated cathode sealed in a bulb containing a reduced pressure of inert gas. The
cathode in each of these types becomes
hot during tube operation, but the heating effect is caused by bombardment of
the cathode by ions within the tube
rather than by heater or filament current from an external source.
The internal structure of an ionicheated ·cathode tube is designed so that
when sufficient voltage is applied to the
tube, ionization of the gas occurs between the anode which is instantaneously
positive and the cathode. Under normal
operating voltages, ionization does not
take place between the anode that is
negative and the cathode so that the
requirements for rectification are satisfied. The initial small flow of current
through the tube is sufficient to raise the
cathode temperature quickly to incandescence whereupon the cathode emits
electrons. The voltage drop in such tubes
is slightly higher than that of the usual
hot-cathode gas rectifiers because energy
is taken from the ionization discharge to
keep the cathode at operating temperature. Proper operation of these rectifiers
requires a minimum flow of load current
at all times in order to maintain the
cathode at the temperature required to
supply sufficient emission.
Triodes
When a third electrode, called the
grid, is placed between the cathode and
plate, the tube is known as a triode, the
family name for a. three-electrode tube.
====- Electrons, Electrodes, and Electron Tubes ====The grid usually consists of relatively
fine wire wound on two support rods
(siderods) and extending the length of
the cathode. The spacing between turns
of wire is large compared with the size of
the wire so that the passage of electrons
from cathode to plate is practically unobstructed by the grid. In some types, a
frame grid is used. The frame consists
of two siderods supported by four metal
straps. Extremely fine lateral wire (diameter of 0.5 mil or less) is wound under
tension around the frame. This type of
grid permits the use of closer spacings
between grid wires and between tube
electrodes, and thus improves tube performance.
The purpose of the grid is to control
the flow of plate current. When a tube
is used as an amplifier, a negative dc voltage is usually applied to the grid. Under
this condition the grid does not draw appreciable current.
The number of electrons attracted
to the plate depends on the combined
effect of the grid and plate polarities, as
shown in Fig. 6. When the plate is positive, as is normal, and the dc grid voltage is made more and more negative, the
plate is less able to attract electrons to it
and plate current decreases. When the
electrode acting as one plate of a small
capacitor. The capacitances are those
existing between grid and plate, plate
and cathode, and grid and cathode.
These capacitances are known as inter.
electrode capacitances. Generally, the
capacitance between grid and plate is of
the most importance. In high-gain radiofrequency amplifier circuits, this capacitance may act to produce undesired
coupling between the input circuit, the
circuit between grid and cathode, and
the output circuit, the circuit between
plate and cathode. This coupling is undesirable in an amplifier because it may
cause instability and unsatisfactory performance.
Tetrodes
The capacitance between grid and
plate can be made small by mounting an
additional electrode, called the screen
grid (grid No.2), in the tube. With the
addition of the grid No.2, the tube has
four electrodes and is, accordingly, called
a tetrode. The screen grid or grid No.2
is mounted between the grid No.1 (con.
trol grid) and the plate, as shown in Fig.
7, and acts as an electrostatic shield between them, thus reducing the grid-toplate capacitance. The effectiveness of
ELECTRON
FLOW
~---(
-----{A
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OUTPut
PLATE
CURRENT
OUTPUT
INPUT
+
Fig. 6
grid is made less and less negative (more
and more positive), the plate more readily attracts electrons to it and plate current increases. Hence, when the voltage
on the grid is varied in accordance with
a signal, the plate current varies with
the signal. Because a small voltage applied to the grid can control a comparatively large amount of plate current, the
signal is amplified by the tube. Typical
three-electrode tube types are the 6C4
and 6AF4A.
The grid, plate, and cathode of a
triode form an electrostatic system, each
Fig. 7
this shielding action is increased by a
bypass capacitor connected between
screen grid and cathode. By means of the
screen grid and this bypass capacitor,
the grid-plate capa('itance of a tetrode is
made very small. In practice, the gridplate capacitance is reduced from several picofarads (pf) for a triode to 0.01
pf or less for a screen-grid tube.
The screen grid has another desirable effect in that it makes plate current
practically independent of plate voltage
over a certain range. The screen grid is
operated at a positive voltage and,
7
RCA Receiving Tube Manual
therefore, attracts electrons from the
cathode. However, because of the comparatively large space between wires of
the screen grid, most of the electrons
drawn to the screen grid pass through it
to the plate. Hence the screen grid supplies an electrostatic force pulling electrons from the cathode to the plate. At
the same time the screen grid shields the
electrons between cathode and screen
grid from the plate so that the plate exerts very little electrostatic force on
electrons near the cathode.
So long as the plate voltage is higher
than the screen-grid voltage, plate current in a screen-grid tube depends to a
great degree on the screen-grid voltage
and very little on the plate voltage. The
fact that plate current in a screen-grid
tube is largely independent of plate voltage makes it possible to obtain much
higher amplification with a tetrode than
with a triode. The low grid-plate capacitance makes it possible to obtain this
high amplification without plate-to-grid
feedback and resultant instability. In
receiving-tube applications, the tetrode
has been replaced to a considerable degree by the pentode.
Pentodes
In all electron tubes, electrons striking the plate may, if moving at sufficient
speed, dislodge other electrons. In twoand three-electrode types, these dislodged electrons usually do not cause
trouble because no positive electrode
other than the plate itself is present to
attract them. These electrons, therefore,
are drawn back to the plate. Emission
caused by bombardment of an electrode
by electrons from the cathode is called
secondary emission because the effect is
secondary to the original cathode emission.
In the case of screen-grid tubes, the
proximity of the positive screen grid to
the plate offers a strong attraction to
these secondary electrons and particularly so if the plate voltage swings lower
than the screen-grid voltage. This effect
lowers the plate current and limits the
useful plate-voltage swing for tetrodes.
The effects of secondary emission
are minimized when a fifth electrode is
placed within the tube between the
screen grid and plate.This fifth electrode
is known as the suppressor grid (grid
8
No.3) and is usually connected to the
cathode, as shown in Fig. 8. Because of
its negative potential with respect to the
plate, the suppressor grid retards the
flight of secondary electrons and diverts
them back to the plate.
ELECTRON
FLOW
rr;.
PLATE
...:=!:=-+t-=.::::..::~:.
A
PLAtE
SCREEN ~Rm:NT
RI
OUTPUT
INPUT
The family name for a five-electrode
tube is "pentode". In power-output
pentodes, the suppressor grid makes possible higher power output with iower
grid-driving voltage; in radio-frequency
amplifier pentodes the suppressor grid
makes possible high voltage amplification at moderate values of plate voltage.
These desirable features result from the
fact that the plate-voltage swing can be
made very large. In fact, the plate voltage may be as low as, or lower than, the
screen-grid voltage without serious loss
in signal-gain capability. Representative
pentodes used for power amplification
are the 3V4 and 6K6GT; representative
pentodes used for voltage amplification
are the lU4, 6AU6A, 6BA6, and 5879.
Beam Power Tubes
A beam power tube is a tetrode or
pentodein which directed electron beams
are used to increase substantially the
power-handling capability of the tube.
Such a tube contains a cathode, a control grid (grid No.1), a screen grid (grid
No.2), a plate, and, optionally, a suppressor grid (grid No.3). When a beam
power tube is designed without an actual suppressor grid, the electrodes are
so spaced that secondary emission from
the plate is suppressed by space-charge
effects between screen grid and plate.
The space charge is produced by the
slowing up of electrons traveling from a
high-potential screen grid to a lowerpotential plate. In this low-velocity region, the space charge produced is suffi-
====- Electrons,
Electrodes, and Electron Tubes ====
cient to repel secondary electrons emitted from the plate and to cause them to
return to the plate.
Beam power tubes of this design
employ beam-confining electrodes at
cathode potential to assist in producing
the desired beam effects and to prevent
stray electrons from the plate from returning to the screen grid outside of the
beam. A feature of a beam power tube
is its low screen-grid current. The screen
grid and the control grid are spiral wires
wound so that each turn of the screen
grid is shaded from the cathode by a
grid turn. This alignment of the screen
grid and control grid causes the electrons
to travel in sheets between the turns of
the screen grid so that very few of them
strike the screen grid. Because of the
effective suppressor action provided by
space charge and because of the low current drawn by the screen grid, the beam
power tube has the advantages of high
power output, high power sensitivity,
and high efficiency.
Fig. 9 shows the structure of a beam
power tube employing space-charge suppression and illustrates how the electrons
are confined to beams. The beam condition illustrated is that for a plate potential less than the screen-grid potential. The high-density space-charge region is indicated by the heavily dashed
lines in the beam. Note that the edges of
the beam-confining electrodes coincide
with the dashed portion of the beam. In
this way the space-charge potential region is extended beyond the beam
boundaries and stray secondary electrons
are prevented from returning to the
screen grid outside of the beam. The,
space-charge effect may also be obtained
by use of an actual suppressor grid. Examples of beam power tubes are 6AQ5A,
6L6GB, 6V6GT, and 50C5.
Multi-Electrode .nll
Multi-Unit Tubes
Early in the history of tube development and application, tubes were designed for general service; that is, a
single tube type-a triode-was used as
a radio-frequency amplifier, an intermediate-frequency amplifier, an audiofrequency amplifier, an oscillator, or a
detector. Obviously, with this diversity
of application, one tube did not meet all
requirements to the best advantage.
Later and present trends of tube design are the development of "specialty"
types. These types are intended either to
give optimum performance in a particular application or to combine in one bulb
functions which formerly required two
or more tubes. The first class of tubes includes such examples of specialty types
as the 6CB6 and 6BY6. Types of this
class generally require more than threeelectrodes to obtain the desired special
characteristics and may be broadly
classed as multi-electrode types. The
6BY6 is an especially interesting type in
this class. This tube has an unusually
large number of electrodes, namely
seven, exclusive of the heater. Plate current in the tube is varied at two different
frequencies at the same time. The tube
is designed primarily for use as a combined sync separator and sync clipper in
television receivers.
The second class includes multiunit tubes such as the twin-diode triodes
6BF6 and 6AV6, as well as triode-pentodes such as the 6U8A and 6X8. This
class also includes class A twin triodes
such as the 6CG7 and 12AX7, and types
such as the 6CM7 containing dissimilar
triode units used primarily as combined
vertical oscillators and vertical deflection amplifiers in television receivers.
Full-wave rectifiers are also multi-unit
types.
A third class of tubes combines features of each of the other two classes.
Typical of this third class are the pentagrid-converter types lR5, 6BE6, and
6SA7. These tubes are similar to the-
9
RCA Receiving Tube Manual
multi-electrode types in that they have
seven electrodes, all of which affect the
electron stream; and they are similar to
the multi-unit tubes in that they perform simultaneously the double function
of oscillator and mixer in superheterodyne receivers.
Receiving Tube Structure
Receiving tubes generally utilize a
glass or metal envelope and abase. Originally, the base was made of metal or
molded phenolic material. Types having a glass envelope and a molded phenolic base include the "octal" types such
as the 5U4GB and the 6SN7GTB.
Types having a metal envelope and
molded phenolic octal base include the
6AC7 and the 6AG7. Many modern types
utilize integral glass bases. Present-day
conventional tube designs utilizing glass
envelopes and integral glass bases include the seven-pin and nine-pin mini.
ature types, the nine-pin novar and neonoval types, and thetwelve-pinduodecar
types. Examples of the seven-pin miniature types are the 6AU6A and 6BN6.
Examples of the nine-pin miniature types
are the 12AU7A and 6EA8. Examples of
the novar types are the 6BH8 and 7868.
The nine-pin base for the novar types
has a relatively large pin-circle diameter
and long pins to insure firm retention of
the tube in its socket.
The nuvistor concept provided a
new approach to electron tube design.
N uvistor tubes utilize a light-weight cantilever-supported cylindrical electrode
structure housed in a ceramic-metal envelope (see page 2 for cutaway view).
These tubes combine new materials,processes, and fabrication techniques. Examples of the nuvistor are the 2CW4
and the 6CW4.
Television Picture Tubes
The picture tube, or kinescope, is a
multi-electrode tube used principally in
television receivers for picture display.
It consists essentially of an electron gun,
a glass or metal-and-glass envelope and
face-plate combination, and a fluorescent screen.
The electron gun includes a cathode
for the production of free electrons, one
or more control electrodes for accelerating the electrons in the beam, and,
optionally, a device for "trapping" unwanted ions out of the electron beam.
Focusing of the beam is accomplished either electromagnetically by
means of a focusing coil placed on the
neck of the tube, or electrostatically, as
shown in Fig. 10, by means of a focusing
electrode (grid No.4) within the envelope of the tube. The screen is a whitefluorescing phosphor P4 of either the
silicate or the sulfide type.
Deflection of the beam is accomplished either electrostatically by means
of deflecting electrodes within the envelope of the tube, or electromagnetically
(
••
I·
CENTERING MAGNET
REf'ERENCE LINE-;
Fig. to
10
CONOUCTIVI
COATING
Electrons, Electrodes, and Electron Tubes - - - ---by means of a deflecting yoke placed on
the neck of the tube. Fig. 10 shows the
structure of the gun section of a picture tube and illustrates how the electron beam is formed and how the beam
is deflected by means of an electromagnetic deflecting yoke. In this type of
tube, ions in the beam are prevented
from damaging the fluorescent screen by
an aluminum film on the gun side of the
screen. This film not only "traps" unwanted ions, but also improves picture
contrast. In many types of non-aluminized tubes, ions are separated from the
electron beam by means of a tilted-gun
and ion-trap-magnet arrangement.
Color television pictnre tubes are
similar to black-and-white picture tubes,
but differ in three major ways. (1) The
light-emitting screen is made up of trios
of phosphor dots deposited in an interlaced pattern. Each dot of a trio is capable of emitting light in one of the three
primary colors (red, green, or blue). (2)
A shadow mask mounted near the screen
of the tube contains over 300,000 apertures, one for each of the phosphor dot
trios. This mask provides color separation by shadowing two of the three
phosphor dots of each trio. (3) Three
closely spaced electron guns, built as a
unit, provide separate beams for excitation of the three different color-phosphor-dot arrays. Thus it is possible to
control the brightness of each of the three
colors independently of the other two.
The three electron guns are mounted
with their axes tilted toward the central
axis of the envelope, and are spaced 120
degrees with respect to each other. The
focusing electrodes of the three guns are
interconnected internally, and their potential is adjusted to cause the separate
beams to focus at the phosphor-dot
screen. All three beams must be made
to converge at the screen while they are
simultaneously being deflected, Convergence is accomplished by the action
of static and dynamic magnetic fields
set up by the radial-converging magnet
assembly mounted on the neck of the
tube. These fields are coupled into the
radial-converging pole pieces within the
tube. Another pair of pole pieces in the
tube is activated by the lateral-converging magnet also mounted on the neck
of the tube. These pole pieces permit
lateral shift in position of the blue beam
in opposition to the lateral shift of the
green and red beams.
A purifying magnet is used with
color picture tubes to provide a magnetic field, adjustable in magnitude and
direction, to effect register over the entire area of the screen. A magnetic shield
is used to minimize the effects of the
earth's magnetic field.
Deflection of the three beams is accomplished simultaneously by a deflecting yoke consisting of four electromagnetic coils similar to the deflecting yoke
used for black-and-white picture tubes.
11
Electron Tube
Characteristics
The term "characteristics" is used
to identify the distinguishing electrical
features and values of an electron tube.
These values may be shown in curve
form or they may be tabulated. When
the characteristics values are given in
~urve form, the curves may be used for
the determination of tube performance
and the calculation of additional tube
factors.
Tube characteristics are obtained
from electrical measurements of a tube
in various circuits under certain definite
conditions of voltages. Characteristics
may be further described by denoting
the conditions of measurements. For example Static Characteristics are the values obtained with different dc potentials
applied to the tube electrodes, while Dynamic Characteristics are the values obtained with an ac voltage on a control
grid under various conditions of dc potentials on the electrodes. The dynamic
characteristics, therefore, are indicative
of the performance capabilities of a tube
under actual working conditions.
Static characteristics may be shown
by plate characteristics curves and transfer (mutual) characteristics curves.These
· curves present the same information,
but in two different forms to increase its
· usefulness. The plate characteristic
. curve is obtained by varying plate voltage and measuring plate current for different grid bias voltages, while the transfer-characteristic curve is obtained by
. varying grid bias voltage and measuring
plate current for different plate voltages.
A plate-characteristic family of curves is
· illustrated by Fig. 11. Fig. 12 gives the
transfer-characteristic family of curves
for the same tube.
DynalDic characteristics include
amplification factor, plate resistance,
·.control-grid - plate transconductance,
and certain detector characteristics, and
may be shown in curve form for varia·tions in tube operating conditions.
The alDplification factor, or 1', is
\the ratio of the change in plate voltage
12
to a change in control-electrode voltage
in the opposite direction, under the condition that the plate current remains unchanged and that all other electrode
voltages are maintained constant. For
example, if, when the plate voltage is
made 1 volt more positive, the controlelectrode (grid-No.1) voltage must be
made 0.1 volt more negative to hold
plate current unchanged, the amplification factor is 1 divided by 0.1, or 10. In
other words, a small voltage variation in
the grid circuit of a tube has the same
effect on the plate current as a large
81'---r--~---r
plate-voltage change-the latter equal
to the product of the grid-voltage change
and amplification factor. The I' of a tube
is often useful for calculating stage gain.
This use is discussed in the ELECTRON
TUBE APPLICATIONS SECTION.
Plate resistance (rp) of an electron
tube is the resistance of the path between
cathode and plate to the flow of alternating current. It is the quotient of a
Electron Tabe Characteristics
small change in plate voltage divided by
the corresponding change in plate current and is expressed in ohms, the unit
of resistance. Thus, if a change of 0.1
milliampere (0.0001 ampere) is produced
by a plate voltage variation of 1 volt,
the plate resistance is 1 divided by
0.0001, or 10000 ohms.
Control-grid-plate transconductance, or simply transconductance (gm),
is a factor which combines in one term
the amplification factor and the plate
resistance, and is the quotient of the
first divided by the second. This term
has also been known as mutual conductance. Transconductance may be more
strictly defined as the quotient of a small
change in plate current (amperes) divided by the small change in the controlgrid voltage producing it, under the condition that all other voltages remain unchanged. Thus, if a grid-voltage change
of 0.5 volt causes a plate-current change
of 1 milliampere (0.001 ampere), with
all other voltages constant, the transconductance is 0.001 divided by 0.5, or
0.002 mho. A "mho" is the unit of conductance and was named by spelling
ohm backwards. For convenience, a
millionth of a mho, or a micromho
(I'mho),is used to express transconductance. Thus, in the example, 0.002 mho
is 2000 micromhos.
Conversion transconductance (gc)
is a characteristic associated with the
mixer (first detector) function of tubes
and may be defined as the quotient of
the intermediate-frequency (if) current
in the primary of the if transformer divided by the applied radio-frequency
(rf) voltage producing it; or more precisely, it is the limiting value of this
quotient as the rf voltage and if current
approach zero. When the performance
of a frequency converter is determined,
conversion transconductance is used in
the same way as control-grid-plate
transconductance is used in single-frequency amplifier computations.
The plate efficiency of a power amplifier tube is the ratio of the ac power
output (Po) to the product of the average dc plate voltage (Eb) and dc plate
current (h) at full signal, or
Plate efficiency =
(%)
Po watts
X 100
Eb volts X Ib amperes
The power sensitivity of a tube is
the ratio of the power output to the
square of the input signal voltage (E1n)
and is expressed in mhos as follows:
Power sensitivity (mho.)
=
(:0
wat~2
in, rml
13
Electron Tube
Applications
The diversified applications of an
electron receiving tube have, within the
scope of this section, been treated under
seven headings. These are: Amplification, Rectification, Detection, Automatic Volume or Gain Control, Oscillation, Frequency Conversion, and Automatic Frequency Control. Although
these operations may take place at either
radio or audio frequencies and may involve the use of different circuits and
different supplemental parts, the general considerations of each kind of operation are basic.
Amplification
The amplifying action of an electron
tube was mentioned under Triodes in
the section on ELECTRONS, ELECTRODES, and ELECTRON TUBES.
This action can be utilized in electronic
circuits in a number of ways, depending
upon the results desired. Four classes of
amplifier service recognized by engineers
are covered by definitions standardized
by the Institute of Radio Engineers.
This classification depends primarily on
the fraction of input cycle during which
plate current is expected to flow under
rated full-load conditions. The classes
are class A, class AB, class B, and class
C. The term "cutoff bias" used in these
definitions is the value of grid bias at
which plate current is very small.
Classes of Service
A class A amplifier is an amplifier
in which the grid bias and alternating
grid voltages are such that plate current
in a specific tube flows at all times.
A class AB amplifier is an amplifier in which the grid bias and alternating grid voltages are such that plate
current in a specific tube flows for appreciably more than half but less than
the entire electrical cycle.
A class B amplifier is an amplifier
in which the grid bias is approximately
equal to the cutoff value, so that the
plate current is approximately zero
when no exciting grid voltage is applied,
14
and so that plate current in a specific
tube flows for approximately one-half
of each cycle when an alternating grid
voltage is applied.
A class C amplifier is an amplifier
in which the grid bias is appreciably
greater than the cutoff value, so that the
plate current in each tube is zero when
no alternating grid voltage is applied,
and so that plate current flows in a
specific tube for appreciably less than
one-half of each cycle when an alternating grid voltage is applied.
The suffix 1 may be added to the letter
or letters of the class identification to
denote that grid current does not flow
during any part of the input cycle. The
suffix 2 may be used to denote that grid
current flows during part of the cycle.
For radio-frequency (rf) amplifiers
which operate into a selective tuned circuit, as in radio transmitter applications,
or under requirements where distortion
is not an important factor, any of the
above classes of amplifiers may be used,
either with a single tube or a push-pull
stage. For audio-frequency (af) amplifiers in which distortion is an important
factor, only class A amplifiers permit
single-tube operation. In this case, operating conditions are usually chosen so
that distortion is kept below the conventional 5 per cent for triodes and the conventional 7 to 10 per cent for tetrodes or
pentodes. Distortion can be reduced below these figures by means of special circuit arrangements such as that discussed
under inverse feedback. With class A
amplifiers, reduced distortion with improved power performance can be obtained by using a push-pull stage for
audio service. With class AB and class B
amplifiers, a balanced stage using two
tubes is required for audio service.
Class A Voltage Amplifiers
As a class A voltage amplifier, an
electron tube is used to reproduce gridvoltage variations across an impedance
or a resistance in the plate circuit. These
Electron Tube Applications
variations are essentially of the same
form as the input signal voltage impressed on the grid, but their amplitude
is increased. This increase is accomplished by operation of the tube at a
suitable grid bias so that the applied
grid input voltage produces plate-current variations proportional to the signal
swings. Because the voltage variation
obtained in the plate circuit is much
larger than that required to swing the
grid, amplification of the signal is obtained.
Fig. 13 gives a graphical illustration
of this method of amplification and
gmXrpXRL
or 1000000 X (rp
RL)
+
where p. is the amplification factor of
the tube, RL is the load resistance in
ohms, r ll is the plate resistance in ohms,
and gm is the transconductance in
micromhos.
From the first formula, it can be
seen that the gain actually obtainable
Fig. 14
Fig. 13
shows, by means of the grid-voltage vs.
plate-current characteristics curve, the
effect of an input signal (8) applied to
the grid of a tube. The output signal (0)
is the resulting amplified plate-current
variation.
The plate current flowing through
the load resistance (R) of Fig. 14 causes
a voltage drop which varies directly
with the plate current. The ratio of this
voltage variation produced in the load
resistance to the input signal voltage is
the voltage amplification, or gain, provided by the tube. The voltage amplification due to the tube is expressed by
the following convenient formulas:
.
.
Voltage amplIficatIOn
I'XRL
=~
0
,
,
I
I
/
/
I
I
I
l
I
I
VOLTAGE AMPLIFICATION VS.LOAD RESISTANCE
FOR THEORETICAL
PLATE
TRIODE
HAVINC.:
..,..--
RESISTANCE:IQQOQ OHMS
AMPLIFICATION .rACTOR=IO
TRANSCONDUCTANCE: :1000 MICAOI\AHOS
"
0
from the tube is less than the tube amplification factor but that the gain approaches the amplification factor when
the load resistance is large compared to
the tube plate resistance. Fig. 15
shows graphically how the gain approaches the amplification factor of the
tube as the load resistance is increased.
From the curve it can be seen that a
high value of load resistance should be
used to obtain high gain in a voltage
amplifier.
In a resistance-coupled amplifier,
the load resistance of the tube is approximately equal to the resistance of the
plate resistor in parallel with the grid
resistor of the following stage. Hence, to
obtain a large value of load resistance, it
is necessary to use a plate resistor and a
grid resistor of large resistance. However, the plate resistor should not be too
large because the flow of plate current
through the plate resistor produces a
voltage drop which reduces the plate
voltage applied to the tube. If the plate
resistor is too large, this drop will be too
100000
I
200000
I
I
300000
I
I
400000
I
,0000C)
LOAD RESI<;TANCE -OHMS
Fig. 15
15
RCA Receiving Tube Manual
large, the plate voltage on the tube will
be too small, and the voltage output of
the tube will be too small. Also, the grid
resistor of the following stage should not
be too large, the actual maximum value
being dependent on the particular tube
type. This precaution is necessary because all tubes contain minute amounts
of residual gas which cause a minute
flow of current through the grid resistor.
If the grid resistor is too large, the positive bias developed by the flow of this
current through the resistor decreases
the normal negative bias and produces
an increase in the plate current. This increased current may overheat the tube
and cause liberation of more gas which,
in turn, will cause further decrease in
bias. The action is cumulative and results in a runaway condition which can
destroy the tube.
A higher value of grid resistance is
permissible when cathode-resistor bias
is used than when fixed bias is used.
When cathode-resistor bias is used, a
loss in bias due to gas or grid-emission
effects is almost completely offset by an
increase in bias due to the voltage drop
across the cathode resistor. Typical values of plate resistor and grid resistor for
tube types used in resistance-coupled
circuits, and the values of gain obtainable, are shown in the RESISTANCECOUPLED AMPLIFIER SECTION.
The input impedance of an electron
tube (that is, the impedance between
grid and cathode) consists of (1) a reactive component due to the capacitance
between grid and cathode, (2) a resistive
component resulting from the time of
transit of electrons between cathode and
grid, and (3) a resistive component developed by the part of the cathode lead
inductance which is common to both the
input and output circuits. Components
(2) and (3) are dependent on the frequency of the incoming signal. The input impedance is very high at audio
frequencies when a tube is operated with
its grid biased negative. In a class A. or
AB. transformer-coupled audio amplifier, therefore, the loading imposed by
the grid on the input transformer is
negligible. As a result, the secondary
impedance of a class A. or class AB. input transformer can be made very high
because the choice is not limited by the
16
input impedance of the tube; however,
transformer design considerations may
limit the choice.
At the higher radio frequencies, the
input impedance may become very low
even when the grid is negative, due to
the finite time of passage of electrons between cathode and grid and to the appreciable lead reactance. This impedance
drops very rapidly as the frequency is
raised, and increases input-circuit loading. In fact, the input impedance may
become low enough at very high radio
frequencies to affect appreciably the
gain and selectivity of a preceding stage.
Tubes such as the "acorn" and "pencil"
types and the high-frequency miniatures
have been developed to have low input
capacitances, low electron-transit time,
and low lead inductance so that their
input impedance is high even at the
ultra-high radio frequencies. Input
admittance is the reciprocal of input
impedance.
A remote-cutoff amplifier tube is
a modified construction of a pentode or
a tetrode type designed to reduce modulation-distortion and cross-modulation
in radio-frequency stages. Cross-modulation is the effect produced in a radio
or television receiver by an interfering
station "riding through" on the carrier
of the station to which the receiver is
tuned. Modulation-distortion is a distortion of the modulated carrier and appears as audio-frequency distortion in
the output. This effect is produced by
a radio-frequency amplifier stage operating on an excessively curved characteristicwhen the grid bias has been increased
to reduce volume. The offending stage
for cross-modulation is usually the first
radio-frequency amplifier,while for modulation-distortion the cause is usually
the last intermediate-frequency stage.
The characteristics of remote-cutoff
types are such as to enable them to
handle both large and small input signals with minimum distortion over a
wide range of signal strength.
Fig. 16 illustrates the construction
of the grid No.1 (control grid) in a remote-cutoff tube. The remote-cutoff action is due to the structure of the grid
which provides a variation in amplification factor with change in grid bias. The
grid No.1 is wound with open spacing at
Electron Tube Applications
the middle and with close spacing at the
ends. When weak signals and low grid
bias are applied to the tube, the effect of
the non-uniform turn spacing of the grid
on cathode emission and tube characteristics is essent:ally the same as for uniform spacing. As the grid bias is made
more negative to handle larger input
CATHODE~
P~TE
~:Rmm
IlmDm
I
~"1"lNl1J
SUPPRESSOR
GRID
GRID
SCREEN
GRID
Fig. 16
signals, the electron flow from the sections of the cathode enclosed by the ends
of the grid is cut off. The plate current
and other tube characteristics are then
dependent on the electron flow through
the open section of the grid. This action
changes the gain of the tube so that
large signals may be handled with minimum distortion due to cross-modulation
and modulation-distortion.
Fig. 17 shows a typical plate-current vs. grid-voltage curve for a remotecutoff type compared with the curve for
a type having a uniformly spaced grid.
It will be noted that while the curves are
similar at small grid-bias voltages, the
plate current of the remote-cutoff tube
drops quite slowly with large values of
bias voltage. This slow change makes it
Fig. 17
possible for the tube to handle large signalssatisfactorily. Becauseremote-cutoff
types can accommodate large and small
signals, they are particularly suitable for
use in sets having automatic volume
control. Remote-cutoff tubes also are
known as variable-mu types.
Class A Power Amplifiers
As a class A power amplifier, an
electron tube is used in the output stage
of a radio or television receiver to supply
a relatively large amount of power to
the loudspeaker. For this application,
large power output is of more importance than high voltage amplification;
therefore, gain possibilities are sacrificed
in the design of power tubes to obtain,
power-handling capability.
Triodes, pentodes, and beam power
tubes designed for power amplifier service have certain inherent features for
each structure. Power tubes of the triode·
type for class A service are characterized
by low power sensitivity, low platepower efficiency, and low distortion.
Power tubes of the pentode type are'
characterized by high power sensitivity,
high plate-power efficiency and, usually"
somewhat higher distortion than class A
triodes. Beam power tubes have higher
e.
8-
AC .. IL ..... ENT
~uPPI...,
Fig. 18
power sensitivity and efficiency than,
triode or conventional pentode types.
A class A power amplifier is also,
used as a driver to supply power to a
class AB, or a class B stage. It is usually
advisable to use a triode, rather than a
pentode, in a driver stage because of the'
lower plate impedance of the triode.
Power tubes connected in either'
parallel or push. pull may be employed
as class A amplifiers to obtain increased,
output. The parallel connection (Fig. 18)
provides twice the output of a single'
tube with the same value of grid-signal
voltage. With this connection, the effective transconductance of the stage is,
doubled, and the effective plate resistance and the load resistance required
are halved as compared with single-·
tube values.
The push-pull connection (Fig. 19),.
although it requires twice the grid-sign all
17
RCA Receiving Tube Manual
voltage, provides increased power and
has other important advantages over
single-tube operation. Distortion caused
by even-order harmonics and hum caused
IE
AC
HEATER
SUPPU
Fig. 19
by plate-voltage-supply fluctuations are
either eliminated or decidedly reduced
through cancellation. Because distortion
for push-pull operation is less than for
single-tube operation, appreciably more
than twice single-tube output can be obtained with triodes by decreasing the
load resistance for the stage to a value
approaching the load resistance for a
single tube.
For either parallel or push-pull
class A operation of two tubes, all electrode currents are doubled while all dc
electrode voltages remain the same as
for single-tube operation. If a cathode
resistor is used, its value should be about
one-half that for a single tube. If oscillations occur with either type of connection, they can often be eliminated by the
use of a non-inductive resistor of approximately 100 ohms connected in
series with each grid at the socket
terminal.
Operation of power tubes so that
Power-Output Calculations
Calculation of the power output of
a triode used as a class A amplifier with
either an output transformer or a choke
having low dc resistance can be made
without serious error from the plate
family of curves by assuming a resistance load. The proper plate current,
grid bias, optimum load resistance, and
per-cent second-harmonic distortion can
also be determined. The calculations are
made graphically and are illustrated in
Fig. 20 for given conditions. The procedure is as follows:
(1) Locate the zero-signal bias point
P by determining the zero-signal bias
Eco from the formula:
Zero-signal bias (Eco)
=
-(0.68 X
Eb)!~
where Eb is the chosen value in volts of
dc plate voltage at which the tube is to
be operated, and p. is the amplification
factor of the tube. This quantity is
shown as negative to indicate that a
negative bias is used.
(2) Locate the value of zero-signal
plate current, 10 , corresponding to point
P.
(3) Locate the point 21", which is
twice the value of 10 and corresponds to
the value of the maximum-signal plate
current Imax.
(4) Locate the point X on the dc
bias curve at zero volts, Ec = 0, corresponding to the value of Imax.
(5) Draw a straight line XY through
X and P.
Line XY is known as the load resistance line. Its slope corresponds to
RCA-2A3
[f=2.5 VOLTS 0 C
Fig.
the grids run positive is inadvisable
,except under conditions such as those
,discussed in this section for class AB
;and class B amplifiers.
18
~o
the value of the load resistance. The load
resistance in ohms is equal to (EmaxEmh) divided by (Imax - 1min), where E
is in volts and I is in amperes.
Electron Tube Applications =======;1
It should be noted that in the case
of filament types of tubes, the calculations are given on the basis of a dcoperated filament. When the filament is
ac-operated, the calculated value of dc
bias should be increased by approximately one-half the filament voltage
rating of the tube.
The value of zero-signal plate current 10 should be used to determine the
plate dissipation, an important factor
influencing tube life. In a class A amplifier under zero-signal conditions, the
plate dissipation is equal to the power
input, i.e., the product of the dc plate
voltage Eo and the Bero-signal dc plate
current 10 • If it is found that the platedissipation rating of the tube is exceeded
with the zero-signal bias Eco calculated
above, it will be necessary to increase
the bias by a sufficient amount so that
the actual plate dissipation does not exceed the rating before proceeding further
with the remaining calculations.
For power-output calculations, it is
assumed that the peak alternating grid
voltage is sufficient (1) to swing the grid
from the zero-signal bias value Eco to
zero bias (Ec = 0) on the positive swing
and (2) to swing the grid to a value
twice the zero-signal bias value on the
negative swing. During the negative
swing, the plate voltage and plate current reach values of Emu and Imln; during the positive swing, they reach values
of Emln and 1m"". Because power is the
product of voltage and current, the
power output Po as shown by a wattmeter is given by
Po _ (lms" - Imln) X (Em"" - Emln)
8
where E is in volts, I is in amperes, and
Po is in watts.
In the output of power amplifier
triodes, some distortion is present. This
distortion is due predominantly to second harmonics in single-tube amplifiers.
The percentage of second-harmonic distortion may be calculated by the following formula:
lmax+ lmln -10
% distortion - ';"lma-,,-.-=2;-lm""':l-:n--X 100
where 10 is the zero-signal plate current
in amperes. If the distortion is excessive,
the load resistance should be increased
or, occasionally, decreased slightly and
the calculations repeated.
Example: Determine the load re-o
sistance, power output, and distortion
of a triode having an amplification fac-·
tor of 4.2, a plate-dissipation rating of
15 watts, and plate characteristics curves
as shown in Fig. 20. The tube is to be,
operated at 250 volts on the plate.
Procedure: For a first approximation, determine the operating point p.
from the zero-signal bias formula, Eco =
-(0.68 X 250) /4.2 = -40.5 volts. From
the curve for this voltage, it is found'
that the zero-signal plate current 10 at a.
plate voltage of 250 volts is 0.08 ampereand, therefore, the plate-dissipation rating is exceeded (0.08 X 250 = 20 watts).
Consequently, it is necessary to reducethe zero-signal plate current to 0.06 ampere at 250 volts. The grid bias is now
seen to be ~43.5 volts. Note that thecurve was taken with a dc filament supply; if the filament is to be operated on,
an ac supply, the bias must be increased
by about one-half the filament voltage,
or to -45 volts, and the circuit returns,
made to the mid-point of the filament
circuit.
Point X can now be determined ..
Point X is at the intersection of the debias curve at zero volts with Imax, wherelmax = 210 = 2 X 0.06 = 0.12 ampere.
Line XY is drawn through points P and.
X. Em"", Emln, and Imln are then found.
from the curves. Substituting these values in the power-output formula, we'
obtain
(0.12 - 0.012) X (365 - 105) 8 52
P
0-
8
- -
.
watts
The resistance represented by load
line XYis
(865 - 105)
(0.12 0.012) - 2410 ohms
When the values from the curves; ,
are substituted in the distortion formula.. I
we obtain
0.12 + 0.012 _ 0.06
'"
d'Istortion
.
YO
- _",,2=:-::---::~::-0.12 _ 0.012 X 100 - 5.5%
It is customary to select the load
resistance so that the distortion does not
exceed five per cent. When the method
shown is used to determine the slope of
the load resistance line, the second-harmonic distortion generally does not ex-ceed five per cent. In the example, however, the distortion is excessive and it is',
desirable, therefore, to use a slightly
19'
RCA Receiving Tube Manual
ihi.gher load resistance. A load resistance
"of 2500 ohms will give a distortion of
about 4.9 per cent. The power output is
lI'educed only slightly to 3.5 watts.
Operating conditions for triodes in
'push.pull depend on the type of opera·
tion desired. Under class A conditions,
,distortion, power output, and efficiency
.are all relatively low. The operating bias
'can be anywhere between that specified
,for single-tube operation and that equal
to one-half the grid-bias voltage required
,to produce plate-current cutoff at a
plate voltage of 1.4Eo where Eo is the
'operating plate voltage. Higher bias than
this value requires higher grid-signal
voltage and results in class AB. operation which is discussed later.
The method for calculating maxi·
mum power output for triodes in push.
pull class A operation is as follows:
Erect a vertical line at 0.6 Eo (see Fig.
:21), intersecting the Ec= 0 curve at the
plate dissipation rating of the tube is 15
watts. Then, for class A operation, the
operating bias can be equal to, but not
more than, one-half the grid bias for cut·
off with a plate voltage of 1.4 X 300 = 420
volts. (Since cutoff bias is approximately
-115 volts at a plate voltage of 420 volts,
one-half of this value is -57.5 volts bias.)
At this bias, the plate current is found
from the plate family to be 0.054 ampere and, therefore, the plate dissipation
is 0.054 X 300 or 16.2 watts. Since-57.5
volts is the limit of bias for class A operation of these tubes at a plate voltage of
300 volts, the dissipation cannot be reduced by increasing the bias and it,
therefore, becomes necessary to reduce
the plate voltage.
If the plate voltage is reduced to
250 volts, the bias will be found to be
-43.5 volts. For this value, the plate current is 0.06 ampere, and the plate dissipation is 15 watts. Then, following the
'Point Imax. Then, Imax is determined
;from the curve for use in the formula
Po - (Imax X Eo)/6
1f Imax is expressed in amperes and Eo
lin volts, power output is in watts.
The method for determining the
]proper load resistance for triodes in
push-pull is as follows: Draw a load line
through Imax on the zero-bias curve and
'through the Eo point on the zero-current
:axis. Four times the resistance repre:sented by this load line is the plate-to'plate load (Rpp) for two triodes in a
·dass A push-pull amplifier. Expressed
las a formula,
Rpp - 4 X (Eo - O.6Eo)/lmax
'where Eo is expressed in volts, lmal< in
·amperes, and Rpp in ohms.
Example: Assume that the plate
'voltage (Eo) is to be 300 volts, and the
method for calculating power output,
erect a vertical line at 0.6Eo = 150 volts.
The intersection of the line with the
curve Ec = 0 is Im"x or 0.2 ampere. When
this value is substituted in the power
formula, the power output is (0.2 X 250)
/5 = 10 watts. The load resistance is determined from the load formula: Plateto-plate load (Rpp) = 4 X (250 - 150)
/0.2 = 2000 ohms.
Power output for a pentode or a
beam power tube as a class A amplifier
can be calculated in much the same way
as for triodes. The calculations can be
made graphically from a special plate
family of curves, as illustrated in Fig. 22.
From a point A at or just below the
~nee of the zero-bias curve, draw arbitrarily selected load lines to intersect the
zero-plate-current axis. These lines
should be on both sides of the operating
20
Electron Tube Applications
% total (2nd and 3rd) harmonic distortion -
point P whose position is determined by
the desired operating plate voltage, Eo,
and one-half the maximum-signal plate
current. Along any load line, say AAl,
measure the distance AOI. On the same
line, layoff an equal distance, OIAl. For
optimum operation, the change in bias
from A to 0, should be nearly equal to
the change in bias from 01 to Alo If this
condition can not be met with one line,
v(%2nd)'
+ (%3rd)'
Conversion Factors
Operating conditions for voltage
values other than those shown in the
published data can be obtained by the
use of the nomograph shown in Fig. 23
when all electrode voltages are changed
simultaneously in the same ratio. The
E.
:::. 0
EO:: O.293V
.,
,'0"
'p
A,
IT
-~~-
----------~--
( ..UN
A,
Ec i;1.707V
Eel =2V
A2
Eo
PLATE VOLTS
Fig. 22
as is the case for the line first chosen,
then another should be chosen. When
the most satisfactory line has been selected, its resistance may be determined
by the following formula:
Emax - Emln
.
Load reslstance (RL)
='I
Imax _ Imin
The value of RL may then be substituted in the following formula for
calculating power output.
p
[Imax-Imln + 1.41 (Ix - Iy)l'RL
32
0=
In both of these formulas, I is in
amperes, E is in volts, RL is in ohms,
and Po is in watts. Ix and Iy are the current values on the load line at bias voltages of Ec, = V - O. 707V = 0.293V and
ECl= V + O.707V=1.707V, respectively.
Calculations for distortion may be
made by means of the following formulas. The terms used have already been
defined.
% 2nd-harmonic distortion =
Imax Imln - 2 10
Imax - Imin 1.41 (Ix -
+
+
Iy)
X 100
% 3rd-harmonic distortion =-
Imax - Imln - 1.41 (Ix - Iy) X 100
Imax - ImiD + 1.41 (Ix - Iy)
nomograph includes conversion factors
for current (FI), power output (Fp),
plate resistance or load resistance (Fr ),
and transconductance (Fgm) for voltage
ratios between 0.5 and 2.0. These factors
are expressed as functions of the ratio
between the desired or new voltage for
any electrode (EdeB) and the published
or original value of that voltage (Epub).
The relations shown are applicable to
triodes and multigrid tubes in all classes
of service.
To use the nomograph, simply place
a straight-edge across the page so that
it intersects the scales for Ede• and Epub
at the desired values. The desired conversion factor may then be read directly
or estimated at the point where the
straight-edge intersects the F!, Fp F r , or
Fgm scale.
For example, suppose it is desired
to operate two 6L6GB's in classAlpushpull, fixed bias, with a plate voltage of
200 volts. The nearest published operating conditions for this class of service
are for a plate voltage of 250 volts. The
operating conditions for the new plate
voltage can be determined as follows:
The voltage conversion factor, Fe,
21
RCA Receiving Tube Manual
is equal to 200/250 or 0.8. The dashed
lines on the nomograph of Fig. 23 indicate that for this voltage ratio FI is approximately 0.72, Fp is approximately
Fr
0.70
Fgm
Ed",
Because contact-potential effects become
noticeable only at very small dc gridNo.1 (bias) voltages. they are generally
negligible in power tubes. Secondary
Ed ..,
Epub
20
18
16
1.40
0.7S
10
20
18
16
9
14
1.30
8
1.20
0.85
.
!u
::.
o
1.10
c
~
o
c
~
o
"">c
~
"~ 1.00
o
1.00
c,)
"
S
u
c
.
.
c~
0.75
~
0.70
~
1.4
g
1.2 ~
~ 1.0
1.0 ~
c
O~9
>
"
':_2
----- - -....
~
~---
."
2_'~: - - _ _ _ t.. O.S
Q)
'"
Q
2
1.5
1.6
0.7
1.4
1.0
0.9
0.8
1.2
0.7
1.0
Fig. 23
0.5
~
0.5
..
<.)
..
0.8 ~
0.7
::::I
'"I
0.6 ~
0.5
0.6
0.6
0.5
~O:r
I.S
1.8
1.0
0.9
0.8
..~
~O.9
;:
."
0.57, Fr is 1.12, and Fgm is approximately 0.892. These factors may be applied directly to operating values shown
in the tube data, or to values calculated
by the methods described previously.
Because this method for conversion
of characteristics is necessarily an approximation, the accuracy of the nomograph decreases progressively as the
ratio Edes/Epub departs from unity. In
general, results are substantially correct
when the value of the ratio Ede,/E"ub is
between 0.7 and 1.5. Beyond these limits, the accuracy decreases rapidly, and
the results obtained must be considered
rough approximations.
The nomograph does not take into
consideration the effects of contact potential or secondary emission in tubes.
22
~
1.6
1.1
o
:: 3
0.6
1.40
1.8
c
.~
1.20
1.30
2.0 ~
1.2
0.85::'
O.BO
I.S
~
~4
..
3.0
1.4
1.3
~0_---(1)
_0.90-(')
7
:: 5
~ 1.10
~
2.0
1.9
1.8
1.7
1.6
10
9
8
6
...
!u
1.44
Fp
6.0
5.S
5.0
4.5
4.0
2.2
e 6
c
~
2.4
12
7
10
9
8
2.8
2.6
14
12
0.80
~O.90
Fi
1.44
•
2.
0.4
0.3
0.4
0.2
0.18
0.34
emission may occur in conventional tetrodes, however, if the plate voltage
swings below the grid-No.2 voltage.
Consequently, the conversion factors
shown in the nomograph apply to such
tubes only when the plate voltage is
greater than the grid-No.2 voltage. Because secondary emission may also occur in certain beam power tubes at very
low values of plate current and plate
voltage, the conversion factors shown in
the nomograph do not apply when these
tubes are operated under such conditions.
Class AB Power Amplifiers
A class AB power amplifier employs two tubes connected in push-pull
with a higher negative grid bias than is
Electron Tube Applications
used in a class A stage. With this higher
negative bias, the plate and screen-grid
voltages can usually be made higher
than for class A amplifiers because the
increased negative bias holds plate current within the limit of the tube platedissipation rating. As a result of these
higher voltages, more power output can
be obtained from class AB operation.
Class AB amplifiers are subdivided
into class AB, and class AB,. In class
AB, there is no flow of grid current. That
is, the peak signal voltage applied to each
grid is not greater than the negative
grid-bias voltage. The grids therefore
are not driven to a positive potential
and do not draw current. In class AB"
the peak signal voltage is greater than
the bias so that the grids are driven
positive and draw current.
Because of the flow of grid current
in a class AB, stage there is a loss of
I'
0.4
fluctuations in the voltage output of the
power supply, with the result that power
output is decreased and distortion is increased. To obtain satisfactory regulation it is usually advisable to use a lowdrop rectifier,such as the 5V4GA, with a
choke-input filter. In all cases, the resistance of the filter choke and power transformers should be as low as possible.
Class AB, Power Amplifiers
In class AB, push-pull amplifier
service using triodes, the operating conditions may be determined graphically
by means of the plate family if Eo, the
desired operating plate voltage, is given.
In this service, the dynamic load line
does not pass through the operating
point P as in the case of the single-tube
amplifier, but through the point D in
Fig. 24. Its position is not affected by
the operating grid bias provided the
RCA-2A)
\
[f=Z,S VOLTS DC
\
\
\
\
CII
~
I-
r'-- r-....
0
-'0I-~
~ t::
~-20
-30
t- r--
'00
r----"
0.85V
r--. I- 0.'4V
1000
FREQUENCY-CPS
10000
Fig. 36
The tone-control network shown in
Fig. 37 has two stages with completely
separate bass and treble controls. Fig. 38
shows simplified representations of the
bass control of this circuit when the
potentiometer is turned to its extreme
variations (usually labeled "Boost" and
"Cut"). In this network, as in the crystalequalizing network shown in Fig. 35,
the parallel RC combination is the controlling factor. For bass "boost", the
capacitor C. bypasses resistor Ra so that
less impedance is placed across the output to grid B at high frequencies than
at low frequencies. For bass "cut," the
parallel combination is shifted so that
C, bypasses Ra, causing more high-frequency than low-frequency output. Essentially, the network is a variable-frequency voltage divider. With proper
34
"
.-- ..... --~--.---,--,-------
Electron Tube Applications
r---_--II---.A
RI
BOOST
>+--+--00
R3>-~~.,J
TREBLE
BASS
Fig. 37
values for the components, it may be
made to respond to changes in the Ra
potentiometer setting for only low frequencies (below 1000 cycles).
BASS CUT
BASS BOOST
B
---o
A
B
RI
Q-'VV'lr-1~........
Fig. 38
Fig. 39 shows extreme positions of
the treble control. The attenuation of
the two circuits is approximately the
same at 1000 cycles. The treble "boost"
circuit is similar to the crystal-equalizing network shown in Fig. 35. In the
treble "cut" circuit, the parallel RC elements serve to attenuate the signal voltage further because the capacitor bypasses the resistance across the output.
TREBLE CUT
TREBLE BOOST
R4
R4
in the plate circuit of the power tube,
the coupling circuit between the first af
amplifier tube and the power tube, or
the grid circuit of the first tube. In an
amplifier using a beam power tube or
pentode power amplifier without negative feedback, it is desirable to connect
a resistance-capacitance filter across the
primary of the output transformer. This
filter may be fixed, with a supplementary tone control elsewhere, or it may
form the tone control itself. If the amplifier incorporates negative feedback,
the tone control may be inserted in the
feedback network or else should be connected to a part of the amplifier which
is external to the feedback loop. The
over-all gain of a well designed tone-control network should be approximately
unity.
Phonograph and Tape Preamplifiers
The frequency range and dynamic
range which can be recorded on aphonograph record or on magnetic tape depend on several factors, including the
composition, mechanical characteristics,
and speed of the record or tape, and the
electrical and mechanical characteristics
O-<'-If-..,MI'-~?-OD ~i~~e f~~~~!~; e:t~;!~1~ ~~~~:a:
R5
Fig. 39
The effect of the capacitor is negligible
at low frequencies; beyond 1000 cycles,
the signal voltage is attenuated at a
maximum rate of 6 db per octave.
The location of a tone-control network is of considerable importance. In a
typical radio receiver, it may be inserted
manufacturers of commercial recordings
use equipment which introduces a nonuniform relationship between amplitude
and frequency. This relationship is
known as a "recording characteristic."
To assure proper reproduction of a highfidelity recording, therefore, some part
of the reproducing system must have a
frequency-response characteristic which
is the inverse of the recording characteristic. Most manufacturers of high-fidelity
recordings use the RCA "New Orthophonic" (RIAA) characteristic for discs
35
RCA Receiving Tube Manual
and the NARTB characteristic for magnetic tape.
Some typical preamplifier stages
are shown in the CIRCUITS SECTION.
The location of the frequency-compensating network or "equalizer" in the reproducing system will depend on the
types of recordings which are to be reproduced and on the pickup devices used.
A ceramic high-fidelity phonograph
pickup is usually designed to provide
proper compensation for the RIAA recording characteristic when the pickup
is operated into the load resistance specified by its manufacturer. Because this
type of pickup also has relatively high
output (0.5 to 1.5 volts), it does not require the use of either an equalizer network or a preamplifier, and can be connected directly to the input of a tonecontrol amplifier and/or power amplifier.
A magnetic high-fidelity phonograph pickup, on the other hand, usually
has an essentially flat frequency-response characteristic and very low output (1 to 10 millivolts). Because a pickup
of this type merely reproduces the recording characteristic, it must be followed by an equalizer network, as well
as by a preamplifier having sufficient
voltage gain to provide the input voltage
required by the tone-control amplifier
and/or power amplifier. Many designs
include both the equalizing and amplifying circuits in a single unit.
A high-fidelity magnetic-tape pickup head, like a magnetic phonograph
pickup, reproduces the recording characteristic and has an output of only a
few millivolts. This type of pickup device, therefore, must also be followed by
an equalizing network and preamplifier,
or by a preamplifier which provides
"built-in" equalization for the NARTB
characteristic.
Limiters
An amplifier may also be used as a
limiter. One use of a limiter is in receivers designed for the reception of frequency-modulated signals. The limiter
in FM receivers has the function of
eliminating amplitude variations from
the input to the detector. Because in an
FM system amplitude variations are
primarily the result of noise disturbances,
the use of a limiter prevents such disturbances from being reproduced in the
36
audio output. The limiter usually follows the last if stage so that it can minimize the effects of disturbances coming
in on the rf carrier and those produced
locally.
The limiter is essentially an if voltage amplifier designed for saturated
operation. Saturated operation means
that an increase in signal voltage above
a certain value produces very little increase in plate current. A signal voltage
which is never less than sufficient to
cause saturation of the limiter, even on
weak signals, is supplied to the limiter
input by the preceding stages. Any
change in amplitude, therefore, such as
might be produced by noise voltage
fluctuation, is not reproduced in the
limiter output. The limiting action, of
course, does not interfere with the reproduction of frequency variations.
Plate-current saturation of the limiter may be obtained by the use of gridNO.1-resistor-and-capacitor bias with
plate and grid-No.2 voltages which are
low compared with customary if-amplifier operating conditions.
As a result of these design features,
the limiter is able to maintain its output
voltage at a constant amplitude over a
wide range of input-signal voltage variations. The output of the limiter is frequency-modulated if voltage, the mean
frequency of which is that of the if amplifier. This voltage is impressed on the
input of the detector.
The reception of FM signals without serious distortion requires that the
response of the receiver be such that
satisfactory amplification of the signal
is provided over the entire range of frequency deviation from the mean frequency. Since the frequency at any instant depends on the modulation at that
instant, it follows that excessive attenuation toward the edges of the band, in
the rf or if stages, will cause distortion.
In a high-fidelity receiver, therefore, the
amplifiers must be capable of amplifying,
for the maximum permissible frequency
deviation of 75 kilocycles, a band 150
kilocycles wide. Suitable tubes for this
purpose are the 6BA6 and 6BJ6.
Television RF Amplifiers
In a radio or television receiver,
noise generated in the first amplifier
Electron Tube Applications
stage is often the controlling factor in
determining the over-all sensitivity of
the receiver. The "front end" of a receiver, therefore, is designed with special
attention to both gain and noise characteristics.
The input circuit of an amplifier inherently contains some thermal noise
contributed by the resistive elements in
the input device. When an input signal
is amplified, therefore, the thermal noise
generated in the input circuit is also
amplified. If the ratio of signal power to
noise power (signal.to.noise ratio, SiN)
is the same in the output circuit as in
the input circuit, the amplifier is considered to be "noiseless" and is said to
have a noise figure of unity, or zero db.
In practical circuits, however, all
amplifier stages generate a certain
amount of noise as a result of thermal
agitation of electrons in resistors and
other components, minute variations in
the cathode emission of tubes (shot effect), and minute grid currents in the
amplifier tubes. As a result, the ratio of
signal power to noise power is inevitably
impaired during amplification. A measure of the degree of impairment is called
the noise figure (NF) of the amplifier,
and is expressed as the ratio of signal
power to noise power at the input
(SI/NI) divided by the ratio of signal
power to noise power at the output
(So/No), as follows:
NF = (SI/NI)
(So/So)
The noise figure in db is equal to
ten times the logarithm of this power
ratio. For example, an amplifier having
a one-db noise figure decreases the signalto-noise ratio by a factor of 1.26, a 3-db
noise figure by a factor of 2, a 10-db
noise figure by a factor of 10, and a 20-db
noise figure by a factor of 100.
Tuner input circuits of vhf television
receivers use either a triode or a pentode
in the rf amplifier stage. Such stages are
required to amplify signals ranging from
55 to 216 Mc and having a bandwidth
of 4.5 Mc, although the tuner is usually
aligned for a bandwidth of 6 Mc to assure complete coverage of the band. In
the early rf tuners, pentodes rather than
triodes were used because the grid-plate
capacitance of triodes created stability
problems. The use of twin triodes in
=======
direct-coupled cathode-drive circuits
makes it possible to obtain stable operation along with the low-noise characteristics of triodes.
Pentodes or tetrodes do not provide
the sensitivity of triodes because of the
"partition noise" introduced by the
screen grid. The direct-coupled cathodedrive circuit provides both the gain and
the stability capabilities of the pentode
and a low-noise triode input stage. Because the cathode-drive stage provides
a low-impedance load to the groundedcathode stage, its gain is very low and
there is no necessity for neutralizing the
grid-plate capacitance. An interstage
impedance, usually an inductance in
series with the plate of the first stage
and the cathode of the second stage, is
often used at higher frequencies to provide a degree of impedance matching
between the units. The cathode-drive
portion of the circuit is matched to the
input network and provides most of the
stage gain. Because the feedback path
of the cathode-drive circuit is the platecathode capacitance, which in most cases
is very small, excellent isolation is provided between the antenna and the local
oscillator.
Development of single triodes having low grid-plate capacitance has made
possible the design of a neutralized triode rf circuit. The 6BN4 has been used
commercially in neutralized triode circuits. Tubes such as the 6GK5 and 6eW4,
now in common usage, were specially
designed to minimize grid-plate capacitance to permit easier neutralization of
a grounded-cathode circuit over the wide
frequency band. The bridge-neutralized
rf amplifier circuit has become widely
used in television tuners. In this arrangement, a portion of the output signal is
returned to the grid out of phase with
the feedback signal from the grid-plate
capacitance. This circuit provides excellent gain and noise performance with
stable operation across the band.
Video Amplifiers
The video amplifier stage in a television receiver usually employs a pentode-type tube specially designed to amplify the wide band of frequencies contained in the video signal and, at the
same time, to provide high gain per
37
RCA Receiving Tube Manual
stage. Pentodes are more useful than
triodes in such stages because they have
high transconductance (to provide high
gain) together with low input and output interelectrode capacitances (to permit the broadband requirements to be
satisfied). An approximate "figure of
merit" for a particular tube· for this
application can be determined from the
ratio of its transconductance, gm, to the
sum of its input and output capacitances,
CIn and Couto as follows:
Figure of Merit = C
in
!mC
out
Typical values for this figure are in the
order of 500 x 106 or greater.
A typical video amplifier stage,
such as that shown in Fig. 40, is connected between the second detector of
the television receiver and the picture
C~
TO
PICTURE
TUBE
f
rROM CONTROL
SECONO
DETEClOR
8 + 0 - - -.......- - "
Fig. 40
tube. The contrast control, R" in this
circuit controls the gain of the video
amplifier tube. The inductance, L" in
series with the load resistor, R L , maintains the plate load impedance at a relatively constant value with increasing
frequency. The inductance L, isolates
the output capacitance of the tube so
that only stray capacitance is placed
across the load. As a result, a highervalue load resistor is used to provide
higher gain without affecting frequency
response or phase relations. The decoupling circuit, C,R 2, is used to improve
the low-frequency response. Tubes used
as video amplifiers include types 6CL6
and 12BY7A, or the pentode sections
of types 6AW8A and 6AN8.
The luminance amplifier in a colortelevision receiveris a conventional video
amplifier having a bandwidth of approximately 3.5 Mc. In a color receiver, the
portion of the output of the second detector which lies within the frequency
38
band from approximately 2.4 to 4.5 Mc
is fed to a bandpass amplifier, as shown
in the block diagram in Fig. 41. The color
Fig. 41
synchronizing signal, or "burst," contained in this signal may then be fed to
a "burst-keyer" tube. At the same time,
a delayed horizontal pulse may be applied to the keyer tube. The output of
the keyer tube is applied to the burst
amplifier tube and the signal is then fed
to the 3.58-Mc oscillator and to the
"color-killer" stage.
The color killer applies a bias voltage to the bandpass amplifier in the absence of burst so that the color section,
or chrominance channel, of the receiver
remains inoperative during black-andwhite broadcasts. A threshold control
varies the bias and controls the burst
level at which the killer stage operates.
The output of the 3.58-Mc oscillator and the output of the bandpass
amplifier are fed into phase and amplitude demodulator circuits. The output
of each demodulator circuit is an electrical representation of a color-difference
signal, i.e., an actual color signal minus
the black-and-white, or luminance, signal. The two color-difference signals are
combined to produce the third colordifference signal; each of the three signals then represents one of the primary
colors.
The three color-difference signals
are usually applied to the grids of the
three electron guns of the color picture
tube, in which case the black-and-white
signal from the luminance amplifier may
be applied simultaneously to the cathodes. The chrominance and luminance
signals then combine to produce the
color picture. In the absence of trans-
Electron Tube Applications
mitted color information, the chrominance channel is cut oft by the color
killer, as described above, and only the
luminance signal is applied to the picture tube, producing a black-and-white
picture.
Television Sync Circuits
In addition to picture information,
the composite video signal supplied to a
television receiver contains information
to assure that the picture produced on
the receiver is synchronized with the
picture being viewed by the camera or
pickup tube. The "sync" pulses, which
have a greater amplitude than the video
signal, trigger the scanning generators
of the receiver when the electron beam
of the pickup tube ends each trace.
The sync pulses in the composite
video signal may be separated from the
video information in the output of the
second or video detector by means of the
triode circuit shown in Fig. 42. In this
circuit, the time constant of the network
TO
SCANNING
CIRCUITS
Fig. 42
R.C. is long with respect to the interval
between pulses. During each pulse, the
grid is driven positive and draws current, thereby charging capacitor C ••
Consequently, the grid develops a bias
which is slightly greater than the cutoft
voltage of the tube. Because plate current flows only during the sync-pulse
period, only the amplified pulse appears
in the output. This sync-separator stage
discriminates against the video information. Because the bias developed on the
grid is proportional to the strength of
the incoming signal, the circuit also has
the advantage of being relatively independent of signal fluctuations.
Because the electron beam scans
the face of the picture tube at difterent
rates in the vertical and horizontal directions, the receiver incorporates two
difierent scanning generators. The repe-
tition rate of the vertical generator is 60
cycles per second, and the rate of the
horizontal generator is approximately
15,750 cycles per second. The composite
video signal includes information which
enables each generator to derive its correcttriggering. One horizontal sync pulse
is supplied at the end of each horizontal
line scan. At the end of each frame,
several pulses of longer duration than
the horizontal sync pulses are supplied
to actuate the vertical generator. The
vertical information is separated from
the horizontal information by difterentiating and integrating circuits.
In fringe areas, two conditions complicate the process of sync separation.
First, the incoming signal available at
the antenna is weak and susceptible to
fading and other variations; second, the
receiver is operating at or near maximum
gain which makes it extremely susceptible to interference from pUlse-type
noise generated by certain types of electrical equipment, ignition ... systems,
switches, or the like. Some type of noiseimmunity provision is almost essential
for acceptable performance. Noise may
be reduced or eliminated from the sync
and agc circuits by gating or by a combination of gating, inversion, and cancellation. An example, of the latter
method is shown in Fig. 43. In this circuit the 6GY6, which has two independent control grids, serves the dual function of agc amplifier and noise inverter.
CO~!ffiOL
-NOIS£""IFREr
;tl~~~ .-,N\I..::.4-l {-. OU~~~ TO
Fig. 43
SEPARATOR
Because the sync tips of the video signal
at grid No.1 of the 6GY6 drive the tube
near its cutoft region, any noise signal
extending above the tip level will appear inverted across the grid-No.2 load
resistor R. This inverted noise signal is
re-combined with the video signal and
39
RCA Receiving Tube Manual
fed to the sync separator at point "A"
Fig. 43 where noise cancellation takes
place. This process leaves the sync pulses
relatively free of disturbing noise and
results in a stable picture. To prevent
reduction of receiver gain due to the effect of noise on the agc amplifier, a portion of the inverted noise signal is fed to
the second control grid, grid No.3, of the
6GY6 to cut off or gate the AGC amplifier when a noise pulse occurs.
A half·wave rectifier and a fullwave rectifier circuit are shown in Fig.
45. In the half-wave circuit, current
flows through the rectifier tube to the
filter on every other half-cycle of the ac
input voltage when the plate is positive
with respect to the cathode. In the fullwave circuit, current flows to the filter
on every half-cycle, through plate No.1
on one half-cycle when plate No. 1 is
Rectification
The rectifying action of a diode
finds important applications in supplying a receiver with dc power from an ac
line and in supplying high dc voltage
from a high-voltage pulse. A typical
arrangement for converting ac to dc includes a rectifier tube, a filter, and a
voltage divider. The rectifying action of
the tube is explained briefly under
Diode8, in the ELECTRONS, ELECTRODES, AND ELECTRON TUBE
SECTION. High-voltage pulse rectification is described later under Horizon-
.
tal Output Circuit8.
OUTPU1'
TO
The function of a filter is to smooth
out the ripple of the tube output, as indicated in Fig. 44 and to increase rectifier efficiency. The action of the filter is
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explained in ELECTRON TUBE INST ALLATION SECTION under Filters. The voltage divider is used to cut
down the output voltage to the values
required by the plates and the other
electrodes of the tubes in the receiver.
40
F'ILTE:R
positive with respect to the cathode, and
through plate No.2 on the next halfcycle when plate No.2 is positive with
respect to the cathode.
Because the current flow to the filter is more uniform in the full-wave circuit than in the half-wave circuit, the
output of the full-wave circuit requires
less filtering. Rectifier operating information and circuits are given under each
rectifier tube type and in the CIRCUIT
SECTION, respectively.
Parallel operation of rectifier tubes
furnishes an output current greater than
that obtainable with the use of one tube.
For example, when two full-wave rectifier tubes are connected in parallel, the
plates of each tube are connected together and each tube acts as a half-wave
rectifier. The allowable voltage and load
conditions per tube are the same as for
full-wave service but the total loadhandling capability of the complete rectifier is approximately doubled.
Electron Tube Applications
When mercury-vapor rectifier tubes positive half-cycle of the ac input, that
are connected in parallel, a stabilizing is, when the upper side of the ac input
resistor of 50 to 100 ohms should be con- line is positive with respect to the lower
nected in series with each plate lead in side, the upper diode passes current and
order that each tube will carry an equal feeds a positive charge into the upper
share of the load. The value of the re- capacitor. As positive charge accumusistor to be used will depend on the lates on the upper plate of the capacitor,
amount of plate current that passes a positive voltage builds up across the
through the rectifier. Low plate current capacitor. On the next half-cycle of the
requires a high value; high plate cur- ac input, when the upper side of the line
rent, a low value. When the plates of is negative with respect to the lower
mercury-vapor rectifier tubes are con- side, the lower diode passes current so
nected in parallel, the corresponding that a negative voltage builds up across
filament leads should be similarly con- the lower capacitor.
So long as no current is drawn at
nected. Otherwise, the tube drops will
be considerably unbalanced and larger the output terminals from the capacitor,
each capacitor can charge up to a voltstabilizing resistors will be required.
Two or more vacuum rectifier tubes age of magnitude E, the peak value of
can also be connected in parallel to give the ac input. It can be seen from the
correspondingly higher output current diagram that with a voltage of +E on
and, as a result of paralleling their in- one capacitor and -E on the other, the
ternal resistances, give somewhat in- total voltage across the capacitors is 2E.
creased voltage output. With vacuum Thus the voltage doubler supplies a notypes, stabilizing resistors mayor may load dc output voltage twice as large as
not be necessary depending on the tube the peak ac input voltage. When current
is drawn at the output terminals by the
type and the circuit.
load, the output voltage drops below 2E
by an amount that depends on the magnitude of the load current and the capacitance of the capacitors. The arrangement shown in Fig. 46 is called a fullwave voltage doubler because each
rectifier passes current to the load on
each half of the ac input cycle.
Two rectifier types especially deFig. 46
signed for use as voltage doublers are
A voltage-doubler circuit of simple the 25Z6GT and 117Z6GT. These tubes
form is shown in Fig. 46. The circuit de- combine two separate diodes in one
rives its name from the fact that its dc tube. As voltage doublers, the tubes are
voltage output can be as high as twice used in "transformerless" receivers. In
the peak value of ac input. Basically, a these receivers, the heaters of all tubes
voltage doubler is a rectifier circuit ar- in the set are connecte. in series with a
ranged so that the output voltages of voltage-dropping resistor acr.ss the line.
The connections for the heater supply
two half-wave rectifiers are in series.
The action of a volta,e doubler can and the voltage-doubli., circuit are
J>e described briefly as follows. On the shown in Fig. 47.
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41
RCA Receiving Tube Manual
With the full-wave voltage-doubler
circuit in Fig. 47, it will be noted that
the dc load circuit can not be connected
to ground or to one side of the ac supply
line. This circuit presents certain disadvantages when the heaters of all the
•
Detection
The effect of amplitude modulation on the waveform of the rf wave is
shown in Fig. 48. There are three different basic circuits used for the detection
of amplitude-modulated waves: the di-
v
UNMODULATED
RF CARRIER
AF ,"ODULATING
WAVE
."'Pi.ITUDE -MODULATED
Af WAVE
Fig. 48
tubes in the set are connected in series
with a resistance across the ac line. Such
a circuit arrangement may cause hum
because of the high ac potential between
the heaters and cathodes of the tubes.
The half-wave voltage-doubler circuit in Fig. 47 overcomes this difficulty
by making one side of the ac line common with the negative side of the dc
load circuit. In this circuit, one half of
the tube is used to charge a capacitor
which, on the following half cycle, discharges in series with the line voltage
through the other half of the tube. This
circuit is called a half-wave voltage
uoubler because rectified current flows
to the load only on alternate halves of
the ac input cycle. The voltage regulation of this arrangement is somewhat
poorer than that of the full-wave voltage
doubler.
Detection
When speech, music, or video information is transmitted from a radio or
television station, the station radiates
!> radio-frequency (rf) wave which is of
either of two general types. In one type,
the wave is said to be amplitude modulated when its frequency remains constf-nt and the amplitude is varied. In the
other type, the wave is said to be frequency modulated when its amplitude
remains essentially constant but its frequency is varied.
The function of the receiver is to
reproduce the original modulating wave
from the modulated rf wave. The receiver
stage in which this function is performed
is called the demodulator or detector
stage.
42
AM
=====-
ode detector, the grid-bias detector, and
the grid-resistor detector. These circuits
are alike in that they eliminate, either
partially or completely, alternate halfcycles of the rf wave. With alternate
half-cycles removed, the audio variations
of the other half-cycles can be amplified
to drive headphones or a loudspeaker.
A diode.detector circuit is shown
in Fig. 49. The action of this circuit
Fig. 49
when a modulated rf wave is applied is
illustrated by Fig. 50. The rf voltage
applied to the circuit is shown in light
line; the output voltage across capacitor
C is shown in heavy line.
Fig. 50
Between points (11) and (b) on the
first positive half-cycle of the applied 1:f
voltage, capacitor C charges up to the
peak value of the rf voltage. Then as the
applied rf voltage falls away from its
peak value, the capacitor holds the cathode at a potential more positive than the
voltage applied to the anode. The capaci-
Electron Tube Applications
tor thus temporarily cuts off current
through the diode. While the diode current is cut off, the capacitor discharges
from (b) to (c) through the diode load
resistor R.
When the rf voltage on the anode
rises high enough to exceed the potential
at which the capacitor holds the cathode, current flows again and the capacitor charges up to the peak value of the
second posltive half-cycle at (d). In this
way, the voltage across the capacitor
follows the peak value of the applied rf
voltage and reproduces the af modulation.
The curve for voltage across the
capacitor, as drawn in Fig. 50, is somewhat jagged. However, this jaggedness,
which represents an rf component in the
voltage across the capacitor, is exaggerated in the drawing. In an actual circuit
the rf component of the voltage across
the capacitor is negligible. Hence, when
the voltage across the capacitor is amplified, the output of the amplifier reproduces the speech or music originating at
the transmitting station.
Another way to describe the action
of a diode detector is to consider the
circuit as a half-wave rectifier. When the
rf signal on the plate swings positive, the
tube conducts and the rectified current
flows through the load resistance R. Because the dc output voltage of a rectifier
depends on the voltage of the ac input,
the dc voltage across C varies in accordance with the amplitude of the rf carrier
and thus reproduces the af signal. Capacitor C should be large enough to
smooth out rf or if variations but should
not be so large as to affect the audio
variations. Two diodes can be connected
in a circuit similar to a full-wave rectifier
to give full-wave detection. However, in
practice, the advantages of this connection generally do not justify the extra
circuit complication.
The diode method of detection produces less distortion than other methods
because the dynamic characteristics of a
diode can be made more linear than
those of other detectors. The disadvantages of a diode are that it does not
amplify the signal, and that it draws
current from the input circuit and therefore reduces the selectivity of the input
circuit. However, because the· diode
-method of detection produces less distortion and because it permits the use
of simple avc circuits without the necessity for an additional voltage supply,
the diode method of detection is most
widely used in broadcast receivers.
A typical diode-detector circuit using
a twin-diode triode tube is shown in Fig.
51. Both diodes are connected together.
Rl is the diode load resistor. A portion
of the af voltage developed across this
resistor is applied to the triode grid
through the volume control R.. In a
typical circuit, resistor Rl may be tapped
Fig. 51
so that five-sixths of the total af voltage
across Rl is applied to the volume control. This tapped connection reduces the
af voltage output of the detector circuit
slightly but it reduces audio distortion
and improves the rf filtering.
DC bias for the triode section is
provided by the cathode-bias resistor R2
and the audio bypass capacitor Ca. The
function of capacitor C2 is to block the
dc bias of the cathode from the grid. The
function of capacitor C4 is to bypass
and rf voltage on the grid to cathode. A
twin-diode pentode may also be used in
this circuit. With a pentode, the af output should be resistance-coupled rather
than transformer-coupled.
Another diode-detector circuit,
called a diode-biased circuit, is shown in
Fig. 52. In this circuit, the triode grid is
Fig. 52
connected directly to a tap on the diode
load resistor. When an rf signal voltage
is applied to the diode, the dc voltage at
43
RCA Receiving Tube Manual
'the tap supplies bias to the triode grid.
When the rf signal is modulated, the af
voltage at the tap is applied to the grid
and is amplified by the triode.
The advantage of the circuit shown
in Fig. 52 over the self-biased arrangement shown in Fig. 51 is that the diodebiased circuit does not employ a capacitor between the grid and the diode load
:resistor, and consequently does not pro,duce as much distortion of a signal having a high percentage of modulation.
However, there are restrictions on
'the use of the diode-biased circuit. Be"cause the bias voltage on the triode depends on the average amplitude of the
"rf voltage applied to the diode, the average amplitude of the voltage applied to
the diode should be constant for all
values of signal strength at the antenna.
'Otherwise there will be different values
'Df bias on the triode grid for different
,signal strengths and the triode will pro,duce distortion. Because there is no bias
applied to the diode-biased triode when
no rf voltage is applied to the diode,
"sufficient resistance should be included
in the plate circuit of the triode to limit
.its zero-bias plate current to a safe value.
These restrictions mean, in practice,
"that the receiver should have a separate,channel automatic-volume-control (avc)
,system. With such an avc system, the
average amplitude of the signal voltage
applied to the diode can be held within
very close limits for all values of signal
strength at the antenna.
The tube used in a diode-biased cir,cuit should be one which operates at a
fairly large value of bias voltage. The
variations in bias voltage are then a
'small percentage of the total bias and
hence produce small distortion. Tubes
taking a fairly large bias voltage are
types such as the 6BF6 or 6SR7 having
,a medium-mu triode. Tube types having
a high-mu triode or a pentode should not
,be used in a diode-biased circuit.
A grid-bias detector circuit is
'shown in Fig. 53. In this circuit, the grid
is biased almost to cutoff, i.e., operated
:so that the plate current with zero signal
is practically zero. The bias voltage can
be obtained from a cathode-bias resistor,
a C-battery, or a bleeder tap. Because of
the high negative bias, only the positive
half-cycles of the rf signal are amplified
44
by the tube. The signal is, therefore, detected in the plate circuit. The advantages of this method of detection are
that it amplifies the signal, besides detecting it, and that it does not draw
RF' CHOKE
Fig. 53
current from the input circuit and therefore does not lower the selectivity of the
input circuit.
The grid - resistor· and. capacitor
method, illustrated by Fig. 54, is somewhat more sensitive than the grid-bias
method and gives its best results on
weak signals. In this circuit, there is no
negative dc bias voltage applied to the
grid. Hence, on the positive half-cycles
of the rf signal, current flows from grid
to cathode. The grid and cathode thus
act as a diode detector, with the grid
resistor as the diode load resistor and the
grid capacitor as the rf bypass capacitor.
The voltage across the capacitor then
reproduces the af modulation in the
same manner as has been explained for
the diode detector. This voltage appears
between the grid and cathode and is
therefore amplified in the plate circuit.
GRID
CAPACITOR
INPUT
A-A+
B-
Fig. 54
The output voltage thus reproduces the
original af signal.
In this detector circuit, the use of a
high-resistance grid resistor increases
selectivity and sensitivity. However, improved af response and stability are obtained with lower values of grid-circuit
resistance. This detector circuit amplifies the signal, but draws current from
Electron Tube Applications
the input circuit and therefore lowers
the selectivity of the input circuit.
FM Detection
The effect of frequency modulation
on the waveform of the rf wave is shown
in Fig. 55. In this type of transmission,
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Fig. 55
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FREQUENCY-MODULATW R;
portion is very short, the voltage developed is low. BecaUie of these limitations, this circuit is not commonly used
but it serves to illustrate the principle.
WAY',
The faults of the simple circuit are
overcome in a push-pull arrangement,
sometimes called a discriminator circuit, such as that shown in Fig. 57. Because of the phase relationships between
the primary and each half of the secondary of the input transformer (each half
of the secondary is connected in series
with the primary through capacitor C,),
the rf voltages applied to the diodes become unequal as the rf signal swings
the frequency of the rf wave deviates
from a mean value, at an rf rate depending on the modulation, by an amount
that is determined in the transmitter
and is proportional to the amplitude of
the af modulation signal.
For this type of modulation, a detector is required to discriminate between deviations above and below the
mean frequency and to translate those
deviations into a voltage whose amplitude varies at audio frequencies. Since
the deviations occur at an audio fre- from the resonant frequency in each
quency, the process is one of demodula- direction.
tion, and the degree of frequency deviaSince the swing occurs at audio
tion determines the amplitude of the frequencies (determined by the af modudemodulated (af) voltage.
lation), the voltage developed across the
A simple circuit for converting fre- diode load resistors, R. and R, connected
quency variations to amplitude varia- in series, varies at audio frequencies. The
tions is a circuit which is tuned so that output voltage depends on the difference
the mean radio frequency is on one slope in amplitude of the voltages developed
of its resonance characteristic, as at A across R. and R 2• These voltages are
of Fig. 56. With modulation, the fre- equal and of opposite sign when the rf
quency swings between Band C, and carrier is not modulated and the output
the voltage developed across the circuit is, therefore, zero. When modulation is
varies at the modulating rate. In order applied, the output voltage varies as
that no distortion will be introduced in indicated in Fig. 58.
this circuit, the frequency swing must be
Because this type of FM detector is
restricted to the portion of the slope sensitive to amplitude variations in the
which is effectively straight. Since this rf carrier, a limiter stage is frequently
45
====== RCA Receiving Tube Manual
used to remove most of the amplitude
modulation from the carrier. (See Limiters under Amplification.)
Fig. 58
Another form of detector for frequency-modulated waves is called aratio
detector. This FM detector, unlike the
previous one which responds to a difference in voltage, responds only to changes
in the ratio of the voltage across two
diodes and is, therefore, insensitive to
changes in the differences in the voltages
due to amplitude modulation of the rf
carrier.
The basic ratio detector is given in
Fig. 59. The plate load for the final if
amplifier stage is the parallel resonant
DIODE2
even at the lowest audio frequencies to
be reproduced.
The rectified voltage across C. is
proportional to the voltage across diode
1, and the rectified voltage across C. is
proportional to the voltage across diode
2. Since the voltages across the two
diodes differ according to the instantaneous frequency of the carrier, the
voltages across C. and C, differ proportionately, the voltage across C. being
the larger of the two voltages at carrier
frequencies below the intermediate frel{uency and the smaller at frequencies
above the intermediate frequency.
These voltages across C. and C, are
additive and their sum is fixed by the
constant voltage across Co. Therefore,
while the ratio of these voltages varies
at an audio rate, their sum is always
constant. The voltage across C, varies
at an audio rate when a frequencymodulated rf carrier is applied to the
ratio detector; this audio voltage is extracted and fed to the audio amplifier.
For a complete circuit utilizing this type
of detector, refer to the CIRCUIT
SECTION.
-=-
Fig. 59
circuit consisting of C. and the primary
transformer T. The tuning and coupling
of the transformer is practically the
same as in the previous circuit and
therefore, the rf voltages applied to the
diodes depend upon how much the rf
signal swings from the resonant frequency in each direction. At this point
the similarity ends.
Diode 1, R., and diode 2 complete a
series circuit fed by the secondary of the
transformer T. The two diodes are connected in series so that they conduct on
the same rf half-cycle. The rectified curtent through R. causes a negative voltage to appear at the plate of diode 1.
Because C6 is large, this negative voltage
at the plate of diode 1 remains constant
"'6
Automatic Volume or Gain Control
The chief purposes of automatic
volume control (ave) or automatic gain
control (age) in a radio or television
receiver are to prevent fluctuations in
loudspeaker volume or picture brightness when the audio or video signal at
the antenna is fading in and out.
An automatic volume coutrol circuit regulates the receiver rf and if gain
so that this gain is less for a strong signal
than for a weak signal. In this way,
when the signal strength at the antenna
changes, the avc circuit reduces the resultant change in the voltage output of
the last if stage and consequently reduces the change in the speaker output
volume.
Electron Tube Applications
The avc circuit reduces the rf and if
gain for a strong signal usually by increasing the negative bias of the rf, if,
and frequency-mixer stages when the
signal increases. A simple avc circuit is
shown in Fig. 60. On each positive halfcycle of the signal voltage, when the
diode plate is positive with respect to
the cathode, the diode passes current.
OUTPUT
LAST
STAGE:
or
JF'
AVC
BIA S
----.-VVVV'...J
VOLTAGE
I
C •
"" FIg. 60
Because of the flow of diode current
through RI, there is a voltage drop across
RI which makes the left end of RI negative with respect to ground. This voltage
drop across RI is applied, through the
filter R. and C, as negative bias on the
grids of the preceding stages. When the
signal strength at the antenna increases,
therefore, the signal applied to the avc
diode increases, the voltage drop across
R. increases, the negative bias voltage
applied to the rf and if stages increases,
and the gain of the rf and if stages is decreased. Thus the increase in signal
strength at the antenna does not produce as much increase in the output of
the last if stage as it would produce
without avc.
When the signal strength at the
antenna decreases from a previous steady
value, the avc circuit acts, of course, in
the reverse direction, applying less negative bias, permitting the rf and if gain
to increase, and thus reducing the decrease in the signal output of the last
if stage. In this way, when the signal
strength at the antenna changes, the avc
circuit acts to reduce change in the output of the last if stage, and thus acts to
reduce change in loudspeaker volume.
The filter, C and R t , prevents the
avc voltage from varying at audio frequency. The filter is necessary because
the voltage drop across R. varies with
the modulation of the carrier being received. If avc voltage were taken directly
from R. without filtering, the audio
variations in avc voltage would vary the
receiver gain so as to smooth out the
modulation of the carrier. To avoid this
effect, the avc voltage is taken from the
capacitor C. Because of the resistance
R. in series with C, the capacitor C can
charge and discharge at only a comparatively slow rate. The avc voltage therefore cannot vary at frequencies as high
as the audio range but can vary at frequencies high enough to compensate for
most fading. Thus the filter permits the
avc circuit to smooth out variations in
signal due to fading, but prevents the
circuit from smoothing out audio modulation.
It will be seen that an ave circuit
and a diode-detector circuit are much
alike. It is therefore convenient in a receiver to combine the detector and the
avc diode in a single stage. Examples of
how these functions are combined in
receivers are shown in CIRCUIT
SECTION.
In the circuit shown in Fig. 60, a
certain amount of avc negative bias is
applied to the preceding stages on a
weak signal. Since it may be desirable
to maintain the receiver rf and if gain
at the maximum possible value for a
weak signal, avc circuits are designed in
some cases to apply no avc bias until the
signal strength exceeds a certain value.
These avc circuits are known as delayed
ave or dave circuits.
A davc circuit is shown in Fig. 61.
In this circuit, the diode section D, of
the 6H6 acts as detector and avc diode.
OUTPUT
OF' LAST
STAGE
1F
I MEG.
DAve
-3V(MIN.)
-f
C2
Fig. 61
R, is the diode load resistor and R. and
C 2 are the avc filter. Because the cathode
of diode D. is returned through a fixed
supply of -3 volts to the cathode of D" a
dc current flows through R, and R2 in
series with D 2• The voltage drop caused
by this current places the avc lead at
approximately -3 volts (less the negligible drop through D.). When the average
47
====== RCA Receiving Tube Manual ======
amplitude of the rectified signal developed across R. does not exceed 3 volts,
the ave lead remains at -3 volts. Hence,
for signals not strong enough to develop
3 volts across R., the bias applied to the
controlled tubes stays constant at a
value giving high sensitivity.
However, when the average amplitude of rectified signal voltage across R.
exceeds 3 volts, the plate of diode D. becomes more negative than the cathode
of D. and current flow in diode D. ceases.
The potential of the ave lead is then controlled by the voltage developed across
R •. Therefore, with further increase in
signal strength, the ave circuit applies
an increasing avc bias voltage to the
controlled stages. In this way, the circuit regnlates the receiver gain for
strong signals, but permits the gain to
stay constant at a maximum value for
weak signals.
It can be seen in Fig. 61 that a portion of the -3 volts delay voltage is
applied to the plate of the detector
diode D., this portion being approximately equal to R./(R. + R.) times -3
volts. Hence, with the circuit constants
as shown, the detector plate is made
negative with respect to its cathode by
approximately one-half volt. However,
this voltage does not interfere with detection because it is not large enough to
prevent current flow in the tube.
Automatic gain coutrol (age) compensates for fluctuations in rf picture
carrier amplitude. The peak carrier level
rather than the average carrier level is
controlled by the age voltage because
the peaks of the sync pulses are fixed
when inserted on a fixed carrier level.
The peak carrier level may be determined
by measurement of the peaks of the
sync pulses at the output of the video
deteetor.
A conventional age circuit, such as
that shown in Fig. 62, consists of a diode
ture content from influencing the magnitude of the agc voltage. The output
voltage (agc voltage) is equal to the
peak value of the incoming signal.
The diode detector receives the incoming signal from the last if stage of
the television receiver through the capacitor CI. The resistor RI provides the
load for the diode. The diode conducts
only when its plate is driven positive
with respect to its cathode. Electrons
then flow from the cathode to the plate
and thence into capacitor CI, where the
negative charge is stored. Because of the
low impedance offered by the diode during conduction, CI charges up to the
value of the peak applied voltage.
During the negative excursion of
the signal, the diode does not conduct,
and CI discharges through resistor R"
Because of the large time constant of
R,C" however, only a small percentage
of the voltage across C. is lost during the
interval between horizontal sync puises.
During succeeding positive cycles, the
incoming signal must overcome the negative charge stored in C. before the diode
conducts, and plate current flows only
at the peak of each positive cycle. The
voltage across CI, therefore, is determined by the level of the peaks of the
positive cycles, or the sync pulses.
The negative voltage developed
across resistor R. by the sync pulses is
filtered by resistor R. and capacitor Ct
to remove the 15,750-cycle ripple of the
horizontal sync pulse. The dc output is
then fed to the if and rf amplifiers as an
agc voltage.
This agc system may be expanded
to include amplification of the agc signal
before detection of the peak level, or
amplification of the dc output, or both.
A direct-coupled amplifier must be used
for amplification of the dc signal. The
addition of amplification makes the system more sensitive to changes in carrier
level.
AGe
~~
Ct
R2
VOLTAGE TO
A "keyed" agc system such as that
in Fig. 63 is used to eliminate flutSTZ~~
..
I~F shown
ter and to improve noise immunity in
~yca
weak signal areas. Thill system provid••
more rapid action than the conventional
Fig. 62
agc circuits because the filter circuit can
detector circuit and an RC filter. The employ lower capacitance and resistance
time constant of the detector circuit is values.
In the keyed agc system, the negamade large enough to prevent the pic48
Electron Tube Applications
tive output of the video detector is fed
directly to the grid No.1 of the first
video amplifier. The positive output of
the video amplifier is, in turn, fed directly to the grid No.1 of the keyed agc
amplifier. The video stage increases the
gain of the agc system and, in addition,
the target appears as a ring of light.
A ray-control electrode is mounted
between the cathode and target. When
the potential of this electrode is less positive than the target, electrons flowing to
the target are repelled by the electrostatic field of the electrode, and do not
CATHODE
LIGHT
SHIELD
' -_ _ AGe
VOLTAGE:
RI'
lr
IFROM LAST
- If STAGE:
'TRIODE_
CRID
e·
=
e·
Fig. 64
Fig. 63
reach that portion of the target behind'
provides noise clipping. The plate volt- the electrode. Because the target does
age for the age amplifier is a positive not glow where it is shielded from elecpulse obtained from a small winding on trons, the control electrode casts a
the horizontal output transformer which shadow on the glowing target. The exis in phase with the horizontal sync pulse tent of this shadow varies from approxobtained from the video amplifier. The imately 1000 of the target when the conpolarity of this pulse is such that the trol electrode is much more negative
plate of the agc amplifier tube is positive than the target to 00 when the control
during the retrace time. The tube is electrode is at approximately the same'
biased so that current flows only when potential as the target.
the grid No.1 and the plate are driven
In the application of the electronpositive simultaneously. The amount of ray tube, the potential of the control
current flow depends on the grid-No.1 electrode is determined by the voltage
potential during the pUlse. These pulses on the grid of the triode section, as can
are smoothed out in the RC network in be seen in Fig. 65. The flow of the triode
the plate circuit (RICI). Because the dc plate current through resistor R producesvoltage developed across RI is negative,
it is suitable for application to the grids
_ _- ' __ , ELECTRONof the rf and if tubes as an agc voltage.
tlAY TU8!
Tuning Indication With
Electron-Ray Tubes
Electron-ray tubes are designed to
indicate visually by means of a fluorescent target the effects of a change in
controlling voltage. One application of
them is as tuning indicators in radio
receivers. Types such as the 6U5, 6E5,
and tile 6AB5/6N5 contain two Illain
parts: (1) a triode which operates as a dc
amplil.r and (2) an electron-ray indicator which is located in the bulb as
shown in Fig. 64. The target is operated
at a positive voltage and, therefore, attracts electrons from the cathode. When
the electrons strike the target they produce a r;low on the fluorescent coating
of the target. Under these conditions,
Fill. 65
a voltage drop which determin.!! the potential of the control electrode. When
the voltage of the triode grid changQl in
the positive direction, plate current incrGases, the potential of the control electrode goes down becaUie of the increaaed
drop acrolls R, and the IIhadow allIlewidens. When the potential of the triode
grid changes in the negati'Ve direction,
the shadow angle narrow••
Another type of indicator tube ill
the 6AF6G. This tube contains onl7 an
indicator unit but employ. two ray-con-
49
RCA Receiving Tube Manual
trol electrodes mounted on opposite sides
of the cathode and connected to individual base pins. It employs an external
dc amplifier. (See Fig. 66.) Thus, two
symmetrically opposite shadow angles
eA+
A- a+
Fig. 67
R: TYPICAL. VALUe: IS
o.~
MEGOHM
Fig. 66
may be obtained by connecting the two
ray-control electrodes together; or, two
unlike patterns may be obtained by individual connection of each ray-control
electrode to its respective amplifier.
In radio receivers, avc voltage is
applied to the grid of the dc amplifier.
Because avc voltage is at maximum
when the set is tuned to give maximum
response to a station, the shadow angle
is at minimum when the receiver is
tuned to resonance with the desired
station.
The choice between electron-ray
tubes depends on the avc characteristic
of the receiver. The 6E5 contains a
sharp-cutoff triode which closes the
shadow angle on a comparatively low
value of avc voltage. The 6AB5/6N5
and 6U5 each have a remote-cutoff triode which closes the shadow on a larger
value of avc voltage than the 6E5. The
6AF6G may be used in conjunction
with dc amplifier tubes having either
remote- or sharp-cutoff characteristics.
Oscillation
As an oscillator, an electron tube
can be employed to generate a continuously alternating voltage. In presentday radio broadcast receivers, this application is limited practically to superheterodyne receivers for supplying the
heterodyning frequency. Several circuits
(represented in Figs. 67 and 68) may be
utilized, but they all depend on feeding
more energy from the plate circuit to the
grid circuit than is required to equal the
power loss in the grid circuit. Feedback
may be produced by electrostatic or
electromagnetic coupling between the
grid and plate circuits. When sufficient
energy is fed back to more than compensate for the loss in the grid circuit, the
50
tube will oscillate. The action consists
of regular surges of power between the
plate and the grid circuit at a frequency
dependent on the circuit constants of
inductance and capacitance. By proper
choice of these values, the frequency
may be adjusted over a very wide range.
8-
HEATER
B+
TRANSFORMER
Fig. 68
Multivibrators
Relaxation oscillators, which are
widely used in present-day electronic
equipment, are used to produce nonsinusoidal waveshapes such as rectangular and sawtooth pulses. Probably the
most common relaxation oscillator is the
multivibrator, which may be considered
as a two-stage resistance-coupled amplifier in which the output of each tube is
coupled into the input of the other tube.
Fig. 69 is a basic multivibrator circuit of the free-running type. In this circuit, oscillations are maintained by the
+
Fig. 69
alternate shifting of conduction from
one tube to the other. The cycle usually
starts with one tube, V" at zero bias,
and.theother, V., at cutoff or beyond.
At this point, the capacitor C. is charged
Electron Tube Applications
sufficiently to cut off V,. C I then begins
to discharge through the resistor R" and
the voltage on the grid of V, rises until
V, begins to conduct. The voltage on the
plate of V, then decreases, causing V I to
conduct less and less. At the same time,
the plate voltage of VI begins to rise,
causing V, to conduct still more heavily.
Because of the amplification, this cumulative effect builds up extremely fast,
and conduction switches from VI to V,
within a few microseconds, depending
on the circuit components.
In this circuit, therefore, conduction switches from VI to V, over the
interval during which C I discharges
from the voltage across R, to the cutoff
voltage for V,. The actual transfer of
conduction does not occur until cutoff
is reached. Conduction switches back to
V I through a similar process to complete
the cycle. The plate waveform is essentially rectangular in shape, and may be
adjusted as to symmetry frequency,
and amplitude by proper choice of circuit constants, tubes, and voltages.
Although this type of multivibrator
is free-running, it may be triggered by
pulses of a given amplitude and frequency
to provide a frequency-stabilized output. Multivibrator circuits may also be
designed so that they are not free-running, but must be triggered externally
to shift conduction from one tube to the
other. Depending on the type of circuit,
conduction may shift back to the first
tube after a given time interval, or the
second tube may continue conducting
until another trigger signal is applied.
Synchroguide Circuits
The "synchroguide" is a controlled
type of oscillator used in television receivers to generate and control the synchronized sawtooth voltage necessary for
adequate line- or horizontal-frequency
scanning. A simplified synchroguide circuit is shown in Fig. 70. This circuit provides stable, noise-free control of a blocking oscillator which generates a horizontal-frequency signal. It permits comparison of the received sync pulses and
the generated sawtooth voltages so that
properly locked-in horizontal scanning
results.
The triode V 2 in Fig. 70 is a conventional blocking oscillator which enables
a sawtooth voltage to be developed
across the capacitor C,. A portion of this
sawtooth is fed back to the grid of thecontrol tube, V 1. The positive sync pulses
TO
HORIZONTAL
SCANNING
AMPLIFIER
r
C2
=
Fig. 70
are also applied to the grid of VI. The
waveforms shown in Fig. 71 illustrate
the sawtooth and sync pulses (A and B)
and their proper "in-sync" combination
(C). The sync pulse occurs partly during
the portion of the sawtooth voltage in
which the triode VI draws current. Any
shift in sync pulse as it is superimposed
A
B
C
o
~.Y_T~_ SAWTOOTH
-""---"'---CUTOFF
SYNC-PULSES
"IN-SYNc"
CUTOFF
OSCILLATING
FREQUENCY
---~-- COMBINATION
---"'~7"'I--~--7""l--7""l- LOWER THAN
/'
V
V
V
Fio;.71
I
SYNC-PULSE
FREQUENCY
on the sawtooth, therefore, will affect
the amount of conduction of the control
tube. A change in control-tube conduction ultimately affects the bias on the
oscillator-tube grid by changing the
voltage to which the capacitor Cl in the
cathode circuit may charge. An increase
in the positive bias increases the frequency of oscillation.
For example, waveform D in Fig.
71 illustrates a condition in which the
sawtooth voltage is advanced in phase
with respect to the sync-pulses. The
widening of the pulse which occurs at
the corner of the sawtooth waveform
allows the control tube to conduct more
current and, consequently, allows the
capacitor Cl to charge to a higher voltage. This increased reference voltage alsoappears in the grid circuit of V2 and
makes the grid more positive. The increased grid voltage then speeds up the
frequency of oscillations until proper
synchronization results.
51
RCA Receiving Tube Manual
the inductive components in the yoke
and transformer. The effect of these inductive components must be taken into consideration, however, particularly
during retrace. The fast rate of current
change during retrace time (which is
approximately 1/15 as long as trace
time) causes a high-voltage pulse at
the plate which could give a trapezoidal waveshape to the plate voltage and
GRID CUTOFF
cause increased plate current, excess
GRADUAL APPROACH;
damping, and lengthened retrace time.
TUBE CAN BE DRIVEN
However, the grid voltage is made suffiA
q
g~~~{ g:;~V;i BY
ciently negative during retrace to keep
VARIATIONS.
the tube close to cutoff,asdescribedbelow.
~SHARPER APPROACH
The frequency, and the relative deMAKES OSCILLATOR LESS
SUSCEPTIBLE TO
viation of the positive and negative por'B
FREQUENCY CHANGES.
tions of each cycle, are dependent on the
Fig. 72
values of resistors R. and Ra and the RC
combination RaC" as explained previDeflection Circuits
ously in the section on multivibrators.
Vertical Output Circuits
The desired trapezoidal waveshape at
A modified multivibrator in which the grid of V, is created by capacitor C,
the vertical output tube is part of the and resistor R 2• If R, were equal to zero,
oscillator circuit is used in the vertical C, would cause the grid-voltage wavedeflection stage of many television re- shape to take the form shown in Fig.
,ceivers. This stage supplies the deflec- 74(a). When R, is sufficiently large, C,
'tiOD energy required for vertical deflec- does not discharge completely when V,
tion of the picture-tube beam. A simpli- conducts. When V. is cut off, therefore,
fied combined vertical-oscillator-output the voltage on the grid of V, immedistage is shown in Fig. 73. Waveshapes at ately rises to the voltage across C lo The
critical points of the circuit are included resulting waveshape is shown in Fig.
The blocking oscillator can be made
more immune to changes in frequency
and noise if Vi is brought out of cutoff
very sharply. This effect is obtained by
sine-wave stabilization. The tuned circuit La-Ca in the plate circuit of Fig. 70
superimposes a shock-excited sine wave
on the plate and grid waveforms, as
shown in Fig. 72.
M
VERTICAL
O\ITPUT
TRANSfORMER
Irnl~ICAL
OUTPUT TUeE
V2
WINDINGS OF
SYNC
.
SIGNAL
HOLD
~INGYOKe
R3
=
L~ARITY
B+
Fig. 73
to illustrate the development of the desired current through the vertical output transformer and deflecting yoke.
The current waveform through the
deflecting yoke and output transformer
should be a sawtooth to provide the desired deflection. The grid and plate voltage waveforms of the output tube could
also be sawtooth except for the effect of
52
VVl m
74(b). The negative-going pulse of the
grid-voltage waveshape prevents the high
plate pulse from causing excess conduction, and thereby prevents overdamping.
<1
Fig. 74
b
Electron Tube Applications
This vertical deflection stage utilizes twin-triode tubes such as the 6DR7
and 6EM7. The 6EM7 is particularly
suitable for this application because it
incorporates dissimilar units to provide
for the different operating requirements
of the oscillator and output sections.
Horizontal Output Circuits
Fig. 75 shows a typical horizontaloutput-and-deflection circuit used in television receivers. In addition to supplying
the deflection energy required for horizontal deflection of the picture-tube
beam, this circuit provides the high dc
-
B+
eOOSTED
8+
*
B+
·~ITY
WIDTH ll·~~
...
CONTROl
CONTROl.
Fig. 75
ond half of the cycle, the voltage swings
below the plate supply voltage, and the
damper diode conducts, damping out the
oscillation. At the same time, the current
through the deflecting yoke reverses and
reaches its negative peak. As the damperdiode current decays exponentially to
zero, the output tube begins to conduct
again. The yoke current, therefore, is
composed of current resulting from
damper-diode conduction followed by
output-tube conduction.
When the output tube is suddenly
cut off, the high-voltage pulse produced
by shock excitation of the load circuit is
increased by means of an extra winding
on the transformer. This high-voltage
pulse charges a high-voltage capacitor
through the high-voltage rectifier. The
output of this circuit is the dc highvoltage supply for the picture tube. The
high-voltage rectifier also obtains its
filament power through a separate winding on the horizontal-output transformer.
Current flowing through the damper
diode charges the "boost" capacitor
through the damper portion of the transformer winding. The polarity of the
charge on the capacitor is such that the
voltage at the low end of the winding is
increased above the plate supply voltage, or B+. This higher voltage or
"boost" is used for the output-tube
plate supply, and may also supply the
deflection oscillators and the verticaloutput circuit provided the current drain
is not excessive.
voltage required for the ultor of the picture tube and the "boosted" B voltage
for other portions of the receiver. The
horizontal-output tube is usually a beam
power tube such as the 6DQ6B, 6CD6GA,or6GW6.
High-Voltage Regulator Circuit
In this circuit, a sawtooth voltage
from the horizontal-oscillator tube is apIn color-television receivers, it is
plied to the grid No.1 of the horizontal- very important to regulate the high-voloutput tube. When this voltage rises tagesupplytothepicturetube.Asuitable
above the cutoff point of the output tube, circuit using the 6BK4 for regulation of
the tube conducts a sawtooth of plate
Rs
current which is fed through the autotransformer to the horizontal-deflecting
yoke. At the end of the horizontal-scanning cycle, which lasts for 63.4 microe·
seconds, the sawtooth voltage on the O/NREGU\.ATEl)
grid suddenly cuts off the output tube.
""PUT)
This sudden change sets up an oscillation
of about 50 to 70 Kc in the output circuit, which may be considered as an inductor shunted by the stray capacitance
Fig. 76
of the circuit. During the first half of
this oscillation, a positive voltage ap- the output of a high-voltage, high-impepears across the transformer. In the sec- dance supply is shown in Fig. 76. In this
53
RCA Receiving Tube Manual
<*,cuit, the cathode is held at-a fixed . applied to the input of the frequencY
pOsitive potential with respect to ground. mixer. These voltages beat, or heteroBecause the grid potential is kept slightly dyne, within the mixer tube to produce
less positive by the voltage drop across a plate current having, in addition to the
resistor R 2, the tube operates in the nega- frequencies of the input voltages, numertive grid region and no grid current is ous sum and difference frequencies.
drawn.
The output circuit of the mixer
When the output voltage, eo, rises stage is provided with a tuned circuit
as a result of a decrease in load current, which is adjusted to select only one beat
a small fraction of the additional vol- frequencY, i.e., the frequencY equal to
tage is applied to the grid of the tube by the difference between the signal frethe voltage-divider circuit consisting of quency and the oscillator frequency. The
Rl and R 2• This increased grid voltage selected output frequency is known as
causes the tube to draw an increased the intermediate frequency, or if. The
current from the unregulated supply. output frequencY of the mixer tube is
The increased current, in turn, causes kept constant for all values of signal frea voltage drop across the high internal quencY by tuning the oscillator to the
impedance of the unregulated supply, proper frequency.
B.s, which tends to counteract the origiImportant advantages gained in a
nal rise of the voltage. If desired, the receiver by the conversion of signal fregrid may be connected to a variable quency to a fixed intermediate frequency
point on the voltage divider to allow are high selectivity with few tuning
some adjustment of the output-voltage stages and a high, as well as stable, overall gain for the receiver.
level.
The grid voltage for the 6BK4 can
Several methods of frequency conalso be obtained from a tap on the B- version for superheterodyne receivers
boost voltage supply. The use of this are of interest. These methods are alike
lower voltage (about 375 volts) elimi- in that they employ a frequency-mixer
nates the need for costly and trouble- tube in which plate current is varied at
some high-voltage resistors. In this ar- a combination frequency of the signal
rangement, variations· in high voltage frequency and the oscillator frequency.
also vary the tapped-down B-boost volt- These variations in plate current proage at the regulator grid, and the result- duce across the tuned plate load a volting variations in conduction of the regu- age of the desired intermediate frelator increase or decrease the loading of quency. The methods differ in the types
the high-voltage supply so that the total of tubes employed and in the means of
supply input voltages to the mixer tube.
load remains nearly constant.
A method widely used before the
Frequency Conversion
availability of tubes especially designed
Frequency conversion is used in for frequency-conversion service and
superheterodyne receivers to change the currently used in many FM, television,
frequency of the rf. signal to an inter- and standard broadcast receivers, emmediate frequency. To perform this ploys as mixer tube either a triode, a
change in frequency, a frequency-con- tetrode, or a pentode, in which oscillator
verting device consisting of an oscillator voltage and signal voltage are applied to
and a frequency mixer is employed. In the same grid. In this method, coupling
such a device, shown diagrammatically between the oscillator and mixer circuits
in Fig. 77, two voltages of different fre- is obtained by means of inductance or
quency, the rf signal voltage and the capacitance.
voltage generated by the oscillator, are
A second method employs a tube
fIlADIO
having an oscillator and frequencY mixer
INTERMEDIATE
FREQUENCY
FREQUENCY
combined in the same envelope. In one
UlPUT
QUTPUT
form of such a tube, coupling between
the two units is obtained by means of
the electron stream within the tube.
Because five grids are used, the tube is
rREQUENCY CONVERTER
called a pentagrid converter.
Fig. 77
54
Electron Tube Applications
Grids No.1 and No.2 and the cathode are connected to an external circuit
to act as a triode oscillator. Grid No.1
is the grid of the oscillator and grid No.
2 is the anode. These and the cathode
can be considered as a composite cathode which supplies to the rest of the
tube an electron stream that varies at
the oscillator frequency.
This varying electron stream is further controlled by the rf signal voltage
on grid No.4. Thus, the variations in
plate current are due to the combination
of the oscillator and the signal frequencies. The purpose of grids No.3 and No.
5, which are connected together within
the tube, is to accelerate the electron
stream and to shield grid No. 4 electrostatically from the other electrodes.
Pentagrid-converter tubes of this
design are good frequency-converting
devices at medium frequencies. However, their performance is better at the
lower frequencies because the output of
the oscillator drops off as the frequency
is raised and because certain undesirable
effects produced by interaction between
oscillator and signal sections of the tube
increase with frequency.
To minimize these effects, several
of the pentagrid-converter tubes are designed so that no electrode functions
alone as the oscillator anode. In these
tubes, grid No. 1 functions as the oscillator grid, and grid No.2 is connected
within the tube to the screen grid (grid
No.4). The combined two grids, Nos. 2
and 4, shield the signal grid (grid No.3)
and act as the composite anode of the
oscillator triode. Grid No.5 acts as the
suppressor grid.
Converter tubes of this type are designed so that the space charge around
the cathode is unaffected by electrons
from the signal grid. Furthermore, the
electrostatic field of the signal grid also
has little effect on the space charge. The
result is that rf voltage on the signal
grid produces little effect on the cathode
current. There is, therefore, little detuning of the oscillator by avc bias because
changes in avc bias produce little change
in oscillator transconductance or in the
input capacitance of grid No. 1.
Examples of the pentagrid converters discussed in the preceding paragraph are thesingle-ended types lR5 and
6BE6. A schematic diagram illustrating
the use of the 6BE6 with self-excitation
is given in Fig. 78; the 6BE6 may also
TyPE 6BE6
GRIDSN!il2&4
(SCREEN)
Fig. 78
be used with separate excitation. A complete circuit is shown in the CIRCUIT
SECTION.
Another method of frequency conversion utilizes a separate oscillator having its grid connected to the No.1 grid
of a mixer hexode. The cathode, triode
grid, and triode plate form the oscillator
unit of the tube. The cathode, hexode
mixer grid (gridNo.1)hexodescreen grids
(grids Nos. 2 and 4), hexode signal grid
(grid No.3), and hexode plate constitute
the mixer unit. The internal shields are
connected to the shell of the tube and
act as a suppressor grid for the hexode
unit.
The action of this tube in converting a radio-frequency signal to an intermediate frequency depends on (1) the
generation of a local frequency by the
triode unit, (2) the transferring of this
frequency to the hexode grid No.1, and
(3) the mixing in the hexode unit of this
frequency with that of the rf signal applied to the hexode grid No.3. The tube
is not critical to changes in oscillatorplate voltage or signal-grid bias and,
therefore, finds important use in allwave receivers to minimize frequencyshift effects at the higher frequencies.
A further method of frequency conversion employs a tube called a pentagrid mixer. This type has two independent control grids and is used with a
separate oscillator tube. RF signal voltage is applied to one of the control grids
and oscillator voltage is applied to the
other. It follows, therefore, that the
variations in plate current are due to
the combination of the oscillator and
signal frequencies.
55
RCA Receiving Tube Manual
The tube contains a heater-cathode,
five grids, and a plate. Grids Nos. 1 and
3 are control grids. The rf signal voltage
is applied to grid No.1. This grid has a
remote-cutoff characteristic and is suited
for control by avc bias voltage. The
oscillator voltage is applied to grid No.
3. This grid has a sharp-cutoff characteristic and produces a comparatively large
effect on plate current for a small amount
of oscillator voltage. Grids Nos. 2 and 4
are connected together within the tube.
They accelerate the electron stream and
shield grid No.3 electrostatically from
the other electrodes. Grid No.6, connected within the tube to the cathode,
functions similarly to the suppressor
grid in a pentode.
In the converter or mixer stage of a
television receiver, stable oscillator operation is most readily obtained when
separate tubes or tube sections are used
for the oscillator and mixer functions. A
typical television mixer-oscillator circuit
is shown in Fig. 79. In such circuits, the
oscillator voltage is applied to the mixer
grid by inductive coupling, capacitive
coupling, or a combination of the two.
RF'INPUT
OSCIL~
'"~
Fig. 79
Tubes containing electrically independent oscillator and mixer units in the
same envelope, such as the 6U8A and
6X8, are designed especially for this
application.
Automatic Frequency Control
An automatic frequency control
(afc) circuit provides a means of correcting automatically the intermediate frequency of a superheterodyne receiver
when, for any rellBon, it drifts from the
frequency to which the if stages are
tuaed. Thill correction is made by adjuating the frequency of the oscillator.
Such a circuit will automatically compenaate for alight changes in rf carrier or
OIeillator frequency 811 well 811 for inaccurate manual or pUl!h-button tuninc.
An ale system requires two sections:
a frequency detector and a variable re56
actance. The detector section may be
essentially the same as the FM detector
illustrated in Fig. 67 and discussed under Detection. In the afc system, however, the output is a dc control voltage,
the magnitude of which is proportional
to the amount of frequency shift. This
dc control voltage is used to control the
grid bias of an electron tube which comprises the variable reactance section
(Fig. 80).
DeCONTROl.
VOL.TAGE
FROM FREo.
DtTtC.TOR
.~
Fig. SO
The plate current of the reactance
tube is shunted across the oscillator tank
circuit. Because the plate current and
plate voltage of the reactance tube are
almost 900 out of phase, the control tube
affects the tank circuit in the same manner as a reactance. The grid bias of the
tube determines the magnitUde of the
effective reactance and, consequently,
a control of this grid bias can be used to
control the oscillator frequency.
Automatic frequency control is also
used in television receivers to keep the
horizontal oscillator in step with the
horizontal-scanning frequency (15,750
cps) at the transmitter. A widely used
horizontal afc circuit is shown in Fig. 81.
This circuit, which is often referred to
as a balanced.phase.detector or phase.
discriminator circuit, is usually employed to control the frequency of a
multivibrator-type horizontal-oscillator
circuit. The 6AL5 detector supplies a dc
control voltage to the grid of the horizontal-oscillator tube which counteraeta
changes in its operating frequency. The
magnitude and polarity of the control
voltages are determined by phase relationships in the mc circuit at a ginn
moment.
The horizontal sync pulses obtained
from the 8ync-&eparator circuit are fed
through a single-triode phase-inverter or
Electron Tube Applications
phase-splitter circuit to the two diode
units of the 6AL5. Because of the action
of the phase-inverter circuit, the signals
REfERENCE VOLTAGE
FROM HORIZONTAL
OUTPUT CIRCUIT
DC CORRECTION'
VOLTAGE: TO GRID
Of HORIZONTAL
OSCILLATOR
Fig. 81
applied to the two diode units are equal
in amplitUde but 180 degrees out of
phase. A reference sawtooth voltage obtained from the horizontal output circuit is also applied simultaneously to
both units. Any change in the oscillator
frequency alters the phase relationship
between the reference sawtooth and the
incoming horizontal sync pulses, causing
one diode unit of the 6AL5 to conduct
more heavily than the other, and thus
producing a correction signal. The system remains balanced at all times, therefore, because momentary changes in
oscillator frequency are instantaneously
corrected by the action of the control
voltage.
The diode units of the 6AL5 are
biased so that conduction takes place
only during the tips of the sync pulses.
The relative position of the sync pulses
on the retrace portion of the sawtooth
waveform at any given instant determines which diode unit conducts more
heavily, and thereby establishes the
magnitude and polarity of the control
voltage. The network between the diode
units and the grid of the horizontal-oscillator tube is essentially a low-pass filter
which prevents the horizontal sync pulses
from affecting the horizontal-oscillator
performance.
57
Electron Tube
Installation
The installation of electron tubes
requires care if high-quality performance
is to be obtained from the associated
circuits. Installation suggestions and
precautions which are generally common to all types of tubes are covered in
this section. Careful observance of these
suggestions will do much to help the experimenter and electronic technician obtain the full performance capabilities of
radio tubes and circuits. Additional pertinent information is given under each
tube type and in the CIRCUIT SECTION.
Filament and Heater Power Supply
The design of electron tubes allows
for some variation in the voltage and
current supplied to the filament or heater,
but most satisfactory results are obtained
from operation at the rated values. When
the voltage is low, the temperature of
the cathode is below normal, with the
result that electron emission is limited.
The limited emission may cause unsatisfactory operation and reduced tube life.
On the other hand, high cathode voltage
may cause rapid evaporation of cathode
material and shorten tube life.
To insure proper tube operation, it
is important that the filament or heater
voltage be checked at the socket terminals by means of a high-resistance voltmeter while the equipment is in operation. In the case of series operation of
heaters or filaments, correct adjustment
can be checked by means of an ammeter
in the heater or filament circuit.
The filament or heater voltage supply may be a direct-current source (a
battery or a dc power line) or an alternating-current power line, depending on
the type of service and type of tube.
Frequently, a resistor (either variable
or fixed) is used with a dc supply to permit compensation for battery voltage
variations or to adjust the tube voltage
at the socket terminals to the correct
value. Ordinarily, a step-down transformer is used with an ac supply to pro58
vide the proper filament or heater voltage. Receivers intended for operation on
both dc and ac power lines have the
heaters connected in series with a suitable resistor and supplied directly from
the power line.
DC filament or heater operation
should be considered on the basis of the
source of power. In the case of the battery supply for the l.4-volt filament
tubes, it is unnecessary to use a voltagedropping resistor in series with the filament and a single dry-cell; the filaments
of these tubes are designed to operate
satisfactorily over the range of voltage
variations that normally occur during
the life of a dry-cell. Likewise, no series
resistor is required when the L25-volt
filament subminiatures are operated from
a single L5-volt flashlight-type dry-cell,
when the 2-volt filament type tubes are
operated from a single storage cell, or
when the 6.3-volt series are operated
from a 6-volt storage battery.
In the case of dry-battery supply
for 2-volt filament tubes, a variable resistor in series with the filament and the
battery is required to compensate for
battery variations. Turning the set on
and off by means of the rheostat is advised to prevent over-voltage conditions
after an off-period because the voltage of
dry-cells rises during off-periods.
In the case of storage-battery supply, air-cell-battery supply, or dc power
supply, a non-adjustable resistor of suitable value may be used. It is well to
check initial operating conditions, and
thus the resistor value, by means of a
voltmeter or ammeter.
AC filament or heater operation
should be considered on the basis of
either a parallel or a series arrangement
of filaments and/or heaters. In the case
of the parallel arrangement, a step-down
transformer is employed. Precautions
should be taken to see that the line voltage is the same as that for which the
primary of the transformer is designed.
The line voltage may be determined by
Electron Tube Installation
measurement with an ac voltmeter
(0-150 volts).
If the line voltage measures in excess of that for which the transformer is
designed, a resistor should be placed in
series with the primary to reduce the
line voltage to the rated value of the
transformer primary.Unless this is done,
the excess input voltage will cause proportionally excessive voltage to be applied to the tubes. Any electron tube
may be damaged or made inoperative by
excessive operating voltages.
If the line voltage is consistently
below that for which the primary of the
transformer is designed, it may be necessary to install a booster transformer
between the ac outlet and the transformer
primary. Before such a transformer is installed, the ac line fluctuations should be
very carefully noted. Some radio sets are
equipped with a line-voltage switch
which permits adjustment of the power
transformer primary to the line voltage.
When this switch is properly adjusted,
the series-resistor or booster-transformer
method of controlling line voltage is
seldom required.
In the case of the series arrangements of filaments and/or heaters, a
voltage-dropping resistance in series with
the heaters and the supply line is usually
required. This resistance should be of
such value that, for normal line voltage,
tubes will operate at their rated heater
or filament current. The method for calCUlating the resistor value is given below.
When the filaments of battery-type
tubes are connected in series, the total
filament current is the sum of the current due to the filament supply and the
plate and grid-No.2 currents (cathode
current) returning to B(-) through the
tube filaments. Consequently, in a series
filament string it is necessary to add
shunt resistors across each filament section to bypass this cathode current in
order to maintain the filament voltage
at its rated value.
The filament or heater resistor
required when filaments and/or heaters
are operated in parallel can be determined easily by a simple formula derived from Ohm's law.
Required resistance (ohms) supply volts - rated volts of tube type
total rated filament current (amperes)
Thus, if a receiver using two IT4's, one
IR5, one IU5, and one 3V4 is to be
operated from a storage battery, the
series resistor is equal to 2 volts (the
voltage from a single storage cell) minus
1.4 volts (voltage rating for these tubes)
divided by 0.3 ampere (the sum of
4 X 0.05 ampere + 1 X 0.1 ampere), i.e.,
approximately 2 ohms. Since this resistor should be variable to allow adjustment for battery depreciation, it is advisable to obtain the next larger commercial size, although any value between
2 and 3 ohms will be quite satisfactory.
Where much power is dissipated in
the resistor, the wattage rating should
be sufficiently large to prevent overheating. The power dissipation in watts
is equal to the voltage drop in the resistor multiplied by the total filament current in amperes. Thus, for the example
above, 0.6 X 0.3 = 0.18 watt. In this
case, the value is so small that any commercial rheostat with suitable resistance
will be adequate.
For the case where the heaters and/
or filaments of several tubes are operated in series, the resistor value is calculated by the following formula, also derived from Ohm's law.
Required resistance (ohms) -
supply volts - total rated volt. of tubes
rated amperes of tubes
Thus, if a receiver having one 6BE6, one
6BA6, one 6AT6, one 25L6GT, and one
25Z6GT is to be operated from a 117volt power line, the series resistor is
equal to 117 volts (the supply voltage)
minus 68.9 volts (the sum of 3 X 6.3
volts + 2 X 25 volts) divided by 0.3 ampere (current rating of these tubes), i.e.,
approximately 160 ohms. The wattage
dissipation in the resistor will be 117
volts minus 68.9 volts times 0.3 ampere,
or approximately 14.4 watts. A resistor
having a wattage rating in excess of this
value should be chosen.
When the series-heater connection
is used in ac/dc receivers, it is usually
advisable to arrange the heaters in the
circuit so that the tubes most sensitive
to hum disturbances are at or near the
ground potential of the circuit. This arrangement reduces the amount of ac
59
RCA Receiving Tube Manual
voltage between the heaters and cathodes of these tubes and minimizes the
hum output of the receiver. The order
of heater connection, by tube function,
from chassis to the rectifier-cathode side
of the ac line is shown in Fig. 82.
The balanced arrangement described
above also minimizes heater-grid hum.
High grid-circuit impedances should be
avoided, if possible. High heater voltages should also be avoided because
heater-cathode hum rises sharply when
117V.
AC OR DC
Fig. 82
Heater-to-Cathode Connection
When heater-type tubes are operated from ac, their cathodes may be returned (through resistors, capacitors, or
other components) to the mid-tap on
the heater supply winding, to the midtap of a small resistor (about 50 ohms)
connected across the winding, or to one
end of the heater supply winding, depending on circuit requirements. In all
circuits, it is important to keep the
heater-cathode voltage within the maximum ratings specified for the tube.
Heater-typetubesmayproducehum
as a result of conduction between heater
and cathode or between heater and control grid, or by modulation of the electron stream by the alternating magnetic
field surrounding the heater. When a
large resistor is used between heater and
cathode (as in series-connected heater
strings), or when one side of the heater
is grounded, even a minute pUlsating
leakage current between heater and cathode can develop a small voltage across
the cathode-circuit impedance and cause
objectionable hum. The use of a large
cathode bypass capacitor is recommended to minimize this source of hum.
Much lower hum levels can be
achieved when heaters are connected in
parallel systems in which the center-tap
of the heater supply is grounded or,
preferably, connected to a positive bias
source of 15 to 80 volts dc to reduce the
flow of alternating current. The heater
leads of the tubes should be twisted and
kept away from high-impedance circuits.
The balanced ac supply provides almost
complete cancellation of the alternating-current components•.
60
the heater voltage is increased above
the published value.
Certain tube types are designed especiallyto minimize hum in high-quality,
high-fidelity audio equipment. Examples
are the 5879, 7025, and 7199.
Plate Voltage Supply
The plate voltage for electron tubes
is obtained from batteries, rectifiers,
direct-current power lines, and small
local generators. The maximum platevoltage value for any tube type should
not be exceeded if most satisfactory performance is to be obtained. Plate voltage should not be applied to a tube unless the corresponding recommended
voltage is also supplied to the grid.
It is recommended that the primary
circuit of the power transformer be fused
to protect the rectifier tube(s), the power
transformer, filter capacitor, and chokes
in case a rectifier tube fails.
Grid Voltage Supply
The recommended grid voltages for
different operating conditions have been
carefully determined to give the most
satisfactory performance. Grid voltage
may be obtained from a fixed source
such as a separate C-battery or a tap on
the voltage divider of the high-voltage
dc supply, from the voltage drop across
a resistor in the cathode circuit, or from
the voltage drop across a resistor in the
grid circuit. The first method is called
"fixed bias"; the second is called "cathode bias" or "self bias"; the third is
called "grid-resistor bias" and is sometimes incorrectly referred to in receivingtube practice as "zero-bias operation."
In any case, the object is to make
Electron Tube Installation
the grid negative with respect to the
cathode by the specified voltage. When
a C-battery is used, the negative terminal is connected to the grid return and
the positive terminal is connected to the
negative filament socket terminal, or to
the cathode terminal if the tube is of the
heater-cathode type. If the filament is
supplied with alternating current, this
connection is usually made to the center-tap of a low resistance (20-50 ohms)
shunted across the filament terminals.
This method reduces hum disturbances
caused by the ac supply. If bias voltages
are obtained from the voltage divider of
a high-voltage dc supply, the grid return
is connected to a more negative tap
than the cathode.
The cathode-biasing method utilizes the voltage drop produced by the
cathode current flowing through a resistor connected between the cathode
and the negative terminal of the B-supply. (See Fig. 83.) The cathode current
is, of course, equal to the plate current
in the case of a triode, or to the sum of
the plate and grid-No.2 currents in the
case of a tetrode, pentode, or beam
power tube. Because the voltage drop
along the resistance is increasingly negative with respect to the cathode, the required negative grid-bias voltage can be
1000/3 = 3000 ohms. If the cathode current of more than one tube passes through
the resistor, or if the tube or tubes employ more than three electrodes, the
total current determines the size of the
resistor.
Bypassing of the cathode-bias resistor depends on circuit-design requirements. In rf circuits the cathode resistor
usually is bypassed. In af circuits the use
of an unbypassed resistor will reduce
distortion by introducing degeneration
into the circuit. However, the use of an
unbypassed resistor decreases gain and
power sensitivity. When bypassing is
used, it is important that the bypass
capacitor be sufficiently large to have
negligible reactance at the lowest frequency to be amplified.
In the case of power-output tubes
having high transconductance such as
the beam power tubes, it may be necessary to shunt the bias resistor with a
small mica capacitor (approximately
0.001~) in order to prevent oscillations.
The usual af bypass mayor may not be
used, depending on whether or not degeneration is desired. In tubes having
high values of transconductance, such
as the 6BA6, 6CB6, and 6AC7, input
capacitance and input conductance
change appreciably with plate current.
...
~
...0.
~
o
~
R= GRID-BIASING RESISTOR
T
= FILAMENT TRANSFORMER
Fig. 83
obtained by connecting the grid return
to the negative end of the resistance.
The value of the resistance for
cathode-biasing a single tube can be determined from the following formula:
Resistance (ohm.) desired grid-bias voltage X 1000
rated cathode current in milliamperes
Thus, the resistance required to produce
9 volts bias for a triode which operates
at 3 milliamperes plate current is 9 X
==
eC
B.
=BYPASS CAPACITOR
When such a tube having a separate
suppressor-grid connection is used as an
rf amplifier, these changes may be minimized by leaving a certain portion of the
cathode-bias resistor unbypassed. In
order to minimize feedback when this
method is used, the external grid-No.1to-plate (wiring) capacitances should be
kept to a minimum, the grid No.2 should
be bypassed to ac ground, and the grid
No.3 should be connected to ac ground.
The use of a cathode resistor to
61
RCA Receiving Tube Manual
obtain bias voltage is not recommended
for amplifiers in which there is appreciable shift of electrode currents with the
application of a signal. In such amplifiers, a separate fixed supply is recommended.
The grid-resistor biasing method
is also a· self-bias method because it
utilizes the voltage drop across the grid
resistor produced by small amounts of
grid current flowing in the grid-cathode
circuit. This current is due to (1) an
electromotive potential difference between the materials comprising the grid
and cathode and (2) grid rectification
when the grid is driven positive. A large
value of resistance is required in order
to limit this current to a very small
value and to avoid undesirable loading
effects on the preceding stage.
Examples of this method of bias are
given in circuits 22-1 and 22-4 in the
CIRCUIT SECTION. In both of these
circuits, the audio amplifier type lU5 or
12AV6 has a 10-megohm resistor between the grid and the negative filament
or cathode to furnish the required bias
which is usually less than 1 volt. This
method of biasing is used principally in
the early voltage amplifier stages (usually employing high-mu triodes) of audio
amplifier circuits, where the tube dissipation will not be excessive under zerosignal conditions.
A grid resistor is also used in many
oscillator circuits for obtaining the required bias. In these circuits, the grid
voltage is relatively constant and its
magnitUde is usually in the order of 5
volts or more. Consequently, the bias
voltage is obtained only through grid
rectification. A relatively low value of
resistor, 0.1 megohm or less, is used.
Oscillator circuits employing this method
of bias are given in circuits 22-1 and
22-4 in the CIRCUIT SECTION.
Grid-bias variation for the rf and
if amplifier stages is a convenient and
frequently used method for controlling
receiver volume. The variable voltage
supplied to the grid may be obtained:
(1) from a variable cathode resistor as
shown in Figs. 84 and 85; (2) from a
bleeder circuit by means of a potentiometer as shown in Fig. 86; or (3) from a
bleeder circuit in which the bleeder current is varied by a tube used for auto-
62
matic volume control. The latter circuit
is shown in Fig. 60.
In all cases it is important that the
control be arranged so that at no time
will the bias be less than the recommended minimum grid-bias voltage for
the particular tubes used. This requirement can be met by providing a fixed
stop on the potentiometer, by connecting
a fixed resistance in series with the variable resistance, or by connecting a fixed
cathode resistance in series with the
variable resistance used for regulation.
Where receiver gain is controlled by
grid-bias variation, it is advisable to
have the control voltages extend over a
wide range in order to minimize crossmodulation and modulation-distortion.
Fig. 86
A remote-cutoff type of tube should,
therefore, be used in the controlled
stages.
In most tubes employing a unipotential cathode, a positive grid current
begins to flow when the grid is slightly
negative and increases rapidly as the
Electron Tube Installation
grid is made more positive, as shown in
Fig. 87. The value of grid voltage at
which the grid-current curve intercepts
the horizontal axis is determined by
several different physical processes, induding an electrothermal effect due to
the differences in temperature and in
material composition of the grid and the
cathode, and by the positive grid current. For values of grid potentials which
.GRID VOLTS
't
Fig. 87
are larger than this intercept, the direction of the grid current is positive (i.e.,
from the grid to the cathode). At smaller
values of grid potential, the direction of
the grid current is negative (i.e., from
the cathode to the grid).
Positive grid current consists of
electrons emitted from the cathode
which are intercepted by the control grid.
Negative grid current, which becomes
appreciable only when the grid potential
is more negative than the value of the
intercept, is a result of the emission of
electrons from the heated control grid to
the cathode, the effect of gas molecules
in the tube, and the influence of leakage
currents between the grid and cathode
and the grid and the plate.
The value of grid potential at the
intercept of the grid-current curve on
the horizontal axis (often mistakenly
called contact potential) may be as high
as 172 volts. If the operating bias of the
tube is less than this intercept, it is found
that two effects are present. Direct current flows in the grid circuit, and the
dynamic input resistance of the tube
may be relatively low. It is generally desirable to supply the tube with a value
of bias sufficiently high so that the operating point of the tube is not near the
value of this intercept. If the value of
the operating bias is near the value of
the intercept. care should be taken to
avoid undesirable effects in the grid circuit due to grid current or low input resistance.
Screen-Grid Voltage Supply
The positive voltage for the screen
grid (grid No.2) of screen-grid tubes
may be obtained from a tap on a voltage
divider, from a potentiometer, or from
a series resistor connected to a high-voltage source, depending on the particular
tube type and its application. The screengrid voltage for tetrodes should be obtained from a voltage divider or a potentiometer rather than through a series
resistor from a high-voltage source because of the characteristic screen-grid
current variations of tetrodes. Fig. 88
shows a tetrode with its screen-grid voltage obtained from a potentiometer.
When pentodes or beam power tubes
are operated under conditions where a
large shift of plate and screen-grid currents does not take place with the application of the signal, the screen-grid voltage may be obtained through a series
resistor from a high-voltage source.This
method of supply is possible because of
A+
A"
Fil':.88
the high uniformity of the screen-grid
current characteristic in pentodes and
beam power tubes. Because the screengrid voltage rises with increase in bias
and resulting decrease in screen-grid
current, the cutoff characteristic of a
pentode is extended by this method of
supply.
This method is sometimes used to
increase the range of signals which can
be handled by a pentode. When used in
resistance-coupled amplifier circuits employing pentodes in combination with
the cathode-biasing method, it minimizes the need for circuit adjustments.
Fig. 89 shows a pentode with its screen63
RCA Receiving Tube Manual
grid voltage supplied through a series
resistor.
When power pentodes and beam
power tubes are operated under conditions such that there is a large change
in plate and screen-grid currents with
the application of signal, the seriesresistor method of obtaining screen-grid
voltage should not be used. A change in
screen-grid current appears as a change
y
1)
B-
B+
Fig. 89
in the voltage drop across the series
resistor in the screen-grid circuit; the
result is a change in the power output
and an increase in distortion. The screengrid voltage should be obtained from a
point in the plate-voltage-supply filter
system having the correct voltage, or
from a separate source.
It is important to note that the
plate voltage of tetrodes, pentodes, and
beam power tubes should be applied before or simultaneously with the screengrid voltage. Otherwise, with voltage on
the screen grid only, the screen-grid current may rise high enough to cause
excessive screen-grid dissipation.
Screen-grid voltage variation for
the rf amplifier stages has sometimes
been used for volume control in oldertype receivers. Reduced screen-grid voltage lowers the transconductance of the
tube and results in reduced gain per
stage. The voltage variation is obtained
by means of a potentiometer shunted
across the screen-grid voltage supply.
(See Fig. 88.) When the screen-grid voltage is varied, it must never exceed the
rating of the tube. This requirement can
be met by providing a fixed stop on the
potentiometer.
Shieltling
In high-frequency stages having
high gain, the output circuit of each
stage must be shielded from the input
circuit ofthatstage. Each high-frequency
stage also must be shielded from the
other high-frequency stages. Unless
shielding is employed, undesired feedback may occur and may produce many
harmful effects on receiver performance.
To prevent this feedback, it is a
desirable practice to shield separately
each unit of the high-frequency stages.
For instance, in a superheterodyne receiver, each if and rf coil may be mounted
in a separate shield can. Baffle plates
may be mounted on the ganged tuning
capacitor to shield each section of the
capacitor from the other section. The
oscillator coil may be especially well
shielded by being mounted under the
chassis.
The shielding precautions required
in a receiver depend on the design of the
receiver and the layout of the parts. In
all receivers having high-gain high-frequency stages, it is necessary to shield
separately each tube in high-frequency
stages. When metal tubes, and in particular the single-ended types, are used,
complete shielding of each tube is provided by the metal shell which is
grounded through its grounding pin as
the socket terminal. The grounding connection should be short and sturdy.
Many modern tubes of glass construction have internal shields, usually connected to the cathode; where present,
these shields are indicated in the socket
diagram.
Dress of Circuit Leads
At high frequencies such as are encountered in FM and television receivers, lead dress, that is, the location and
arrangement of the leads used for connections in the receiver, is very important. Because even a short lead provides
a large impedance at high frequencies,
it is necessary to keep all high-frequency
leads as short as possible. This precaution is especially important for ground
connections and for all connections to
bypass capacitors and high-frequency
filter capacitors. The ground connections
of plate and screen-grid bypass capacitors of each tube should be kept short
and made directly to cathode ground.
Particular care should be taken
with the lead dress of the input and output circuits of high-frequency stages so
that the possibility of stray coupling is
Electron Tube Installation
minimized. Unshielded leads connected
to shielded components should be dressed
close to the chassis. As the frequency increases, the need for careful lead dress
becomes increasingly important.
In high-gain audio amplifiers, these
same precautions should be taken to
minimize the possibility of self-oscillation.
Filters
Feedback effects also are caused in
radio or television receivers by coupling
between stages through common voltage-supply circuits. Filters find an important use in minimizing such effects.
They should be placed in voltage-supply
leads to each tube in order to return the
signal current through a low-impedance
path direct to the tube cathode rather
than by way of the voltage-supply circuit. Fig. 90 illustrates several forms of
filter circuits. Capacitor C forms the
DC
DC
VOLTAGe::
VOLTAGE.
~ ~
Tr:
1::
CATHODE
DC
lOOOO~
VOLTAGE
LEAD..
T~ CATHODE
R=RESISTOR
L=A
r
CATHO:J
1°OO0~O
DC
VOLTAGE
LEAD
I'
1:CATH:ET
C=BYPASS CAPACITOR
OR R r CHOKE;
Fig. 90
low-impedance path, while the choke or
resistor assists in diverting the signal
through the capacitor by offering a high
impedance to the power-supply circuit.
The choice between a resistor and a
choke depends chiefly upon the permissible dc voltage drop through the filter.
In circuits where the current is small (a
few milliamperes), resistors are practical ;
where the current is large or regUlation
important, chokes are more suitable.
The minimum practical size of the
capacitors may be estimated in most
cases by the following rule: The impedance of the capacitor at the lowest frequency amplified should not be more
than one-fifth of the impedance of the
filter choke or resistor at that frequency.
Better results will be obtained in special
cases if the ratio is not more than onetenth.
Radio-frequency circuits, particularly at high frequencies, require highquality capacitors. Mica or ceramic capacitors are preferable. Where stage
shields are employed, filters should be
placed within the shield.
Another important application of
filters is to smooth the output of a rectifier tube. See Rectification. A smoothing
filter usually consists of capacitors and
iron-core chokes. In any filter-design
problem, the load impedance must be
considered as an integral part of the filter because the load is an important
factor in filter performance. Smoothing
effect is obtained from the chokes because they are in series with the load and
offer a high impedance to the ripple voltage. Smoothing effect is obtained from
the capacitors because they are in parallel with the load and store energy on the
voltage peaks; this energy is released on
the voltage dips and serves to maintain
the voltage at the load SUbstantially
constant. Smoothing filters are classified
as choke-input or capacitor-input according to whether a choke or capacitor
is placed next to the rectifier tube. See
Fig. 91.
The CIRCUIT SECTION gives a
number of examples of rectifier circuits
with recommended filter constants.
If an input capacitor is used, consideration must be given to the instanCAPACITOR F'ILTElI
0
D
',"PUT
FROM
OUTPut,
. . II
uel.FltR
.",
C
=FILTER CAPACITPR.
•
II
Fig. 91
65
RCA Receiving Tube Manual
taneous peak value of the ac input voltage. This peak value is about 1.4 times
the rms value as measured by an ac
voltmeter. Filter capacitors, therefore,
especially the input capacitor, should
have a rating high enough to withstand
the instantaneous peak value if breakdown is to be avoided. When the inputchoke method is used, the available dc
output voltage will be somewhat lower
than with the input-capacitor method
for a given ac plate voltage. However,
improved regulation together with lower
peak current will be obtained.
Mercury-vapor and gas-filled rectifier tubes occasionally produce a form of
local interference in radio receivers
through direct radiation or. through the
power line. This interference is generally
identified in the receiver as a broadly
tunable 120-cycle buzz (100 cycles for
50-cycle supply line, etc.). It is usually
caused by the formation of a steep wave
front when plate current within the tube
begins to flow on the positive half of
each cycle of the ac supply voltage.
There are several ways of eliminating this type of interference. One is
to shield the tube. Another is to insert
an rf choke having an inductance of one
millihenry or more between each plate
and transformer winding and to connect
high-voltage, rf bypass capacitors between the outside ends of the transformer
winding and the center tap. (See Fig.
92.) The rf chokes should be placed within the shielding of the tube. The rf bypass
C.=RF BYPASS CAPACITOR,MICA
the plate leads of the rectifier extremely
short. In general, the particular method
of interference elimination must be selected by experiment for each installation.
Output-Coupling Devices
An output-coupling device is used
in the plate circuit of a power output
tube to keep the comparatively high dc
plate current from the winding of an
electromagnetic speaker and, also, to
transfer power efficiently from the output stage to a loudspeaker of either the
electromagnetic or dynamic type.
Output-coupling devices are of two
types, (1) choke-capacitor and (2) transformer. The choke-capacitor type includes an iron-core choke having an
inductance of not less than 10 henries
which is placed in series with the plate
and B-supply. The choke offers a very
low resistance to the dc plate current
component of the signal voltage but opposes the flow of the fluctuating component. A bypass capacitor of 2 to 6 microfarads supplies a path to the speaker
winding for the signal voltage. The
choke-coil output coupling device, however, is now only of historical interest.
The transformer type is constructed
with two separate windings, a primary
and a secondary wound on an iron core.
This construction permits designing each
winding to meet the requirements of its
position in the circuit. Typical arrangements of each type of coupling device
are shown in Fig. 93. Examples of transformers for push-pull stages are shown
L=RF CHOKE
I,OUDSPEAKER
Fig. 92
capacitors should have a voltage rating
high enough to withstand the peak voltage of each half of the secondary, which
is approximately 1.4 times the rms value.
Transformers having electrostatic
shield:ng between primary and secondary are not likely to transmit rf disturbances to the line. Often the interference
may be eliminated simply by making
66
Y
~ATHOOE
CHOKE-COIL METHOD
Fig. 93
in several of the circuits given in the
CIRCUIT SECTION.
High-Fidelity Systems
The results achieved from any high-
Electron Tube Installation
ddelity amplifier system depend to a
large degree upon the skill and care with
which the system is constructed. Improper placement of transformers, other
components, and wiring, and attempts
to achieve excessive compactness, can
only result in instability, oscillation,
hum, and other operating difficulties, as
well as in damage to components by
overheating. It is important, therefore,
that construction of high-fidelity amplifier systems be undertaken only by
persons who have had some experience
in the layout, mechanical construction,
and wiring of audio equipment.
It is impractical to give specific
construction data for various amplifiers
and supplementary units because the
best arrangement for each unit or combination of units will depend on the requirements of the user. It is possible,
however, to list some general considerations which should be observed in the
construction of any high-fidelity amplifier system.
Any amplifier having two or more
stages should be constructed with a
straight-line layout so that maximum
separation is provided between the
signal input and output circuits and terminals. Power-supply connections, particularly those carrying ac, should be
isolated as far as possible from signal
connections, especially from the input
connection. Signal-carrying conductors,
even when shielded, should not be cabled
together with power-supply conductors.
Internal wiring for ac-operated tube
heaters, switches, pilot-light sockets,
and other devices, should be twisted and
placed flat against the chassis. All connections to the ground side of the circuit
in each unit should be made to a common
bus of heavy wire. This bus should be
connected to the chassis only at the point
of minimum signal voltage, i.e., at the
signal-input terminal of the unit.
All internal wiring that carries signal voltages should be as short as possible, and as far as possible above the
chassis, to minimize losses at the higher
audio frequencies due to stray shunt
capacitance. All connections between
units should be made with shielded cable
having a capacitance of not more than
30 picofarads per foot, such as Alpha
Type 1249 or 1704, Belden Type 8401
or 8410, or equivalent cable.
Because power amplifiers and power-supply units of high-fidelity systems
normally dissipate large amounts of heat,
they should be constructed and installed
in such a manner as to assure adequate
ventilation for the tubes and other components. A beam power tube or rectifier
tube should be separated from any other
tube or component on the same side of
the chassis by at least 1% tube diameters.
Power amplifiers and power-supply
units which are to be installed horizontally (i.e., with the tubes vertical) in
cabinets or on shelves should be provided with mounting feet, perforated
bottom covers, and a number of small
holes around each tube socket to permit
relatively cool air to enter from below
and provide ventilation for the under
side of the chassis and tubes.
If a power amplifier, tone-control
amplifier, and one or more preamplifiers
are to be constructed on the same chassis,
the mechanical layout should be planned
so that the circuits operating at the lowest signal levels are farthest from the
output stage and power supply. Amplifier units which normally operate at comparable signal levels but are not used
simultaneously (such as preamplifiers for
tape pickup heads and magnetic phonograph pickups) may be installed side by
side on the same chaasis without danger
of interaction. Units which operate simultaneously, however (such as the channels of a stereophonic system), should
not be installed side by side on the same
chassis without careful consideration to
placement of components and wiring,
and the possible use of shielding to prevent interaction.
When an amplifier, preamplifier,
mixer, or other unit requiring heater
power is located more than five or six
feet from its power-supply unit, the
heater-current conductors in the powersupply cable must be large enough to
assure that each tube receives its rated
heater voltage. In cases where very large
heater currents or very long power-supply cables are involved, it may be desirable to install a heater-supply transformer on or near the amplifier unit. If
such a transformer is installed on or nf'ar
a preamplifier for a magnetic-tape pick67
RCA Receiving Tuhe Manual
up head, a magnetic phonograph-pickup
or a dynamic microphone, the trans:
former should be completely shielded
and positioned to prevent its field from
inducing hum in the pickup~ device.
unless suitable precautions are taken.
Corona, which is an electrical discharge
appearing on the surface of a conductor
when the voltage gradient exceeds the
breakdown value of air, causes deterioration of organic insulating materials
High-Voltage Considerations for
through formation of ozone, and induces
Television Picture Tubes
ar~-over at points and sharp edges. Sharp
Like other high-voltage devices, POInts other irregularities on any part
television picture tubes require that of the hIgh-voltage system may increase
certain precautioIlB" be-observed to mini- the possibility of corona and should be
mize the possibility of failure caused by avoided.
In the metal-shell picture tubes, the
humidity, dust, and corona.
Humidity Considerations. When metal lip at the maximum diameter has
humidity is high, a continuous film of rounded edges to prevent corona. Ademoisture may form on the glass bulMm- quate spacing between the lip and any
mediately surrounding the ultor-cavity grounded element in the receiver, or becap of all-glass picture tubes or on the tween the small end of the metal shell
glass part of the envelope of metal pic- and any grounded element, should be
ture tubes~ This film may permit spark- provided to preclude the possibility of
ing to take place over the glass surface corona. Such spacing should not be less
to the external conductive coating or to than 1 inch of air. Similarly, an air space
the metal shell. Such sparking may in- of 1 inch, or equivalent, should be protroduce noise into the receiver. To pre- vided around the body of the metal
vent such a possibility, the uncoated shell. As a further precaution to prevent
bulb surface around the cap and the corona, the deflecting-yoke surface on
glass part of the envelope of metal pic- the end adjacent to the shell should preture tubes should be kept clean and dry. sent a smooth electrical surface with
Dust Considerations. The accumu- respect to the small end of the metal
lation of dust on the uncoated area of shell or the ultor terminal of all-glass
the bulb around the ultor cap of all-glass tubes.
picture tubes or on the glass part of the Picture-Tube Safety Considerations
envelope or insulating supports for metal
Tube Handling. Breakage of picpicture tubes will decrease the insulating ture tubes, which contain a high vacuqualities of these parts. The dust usually um, may result in injury from flying
consists of fibrous materials and may glass. Do not strike or scratch the tube
contain soluble salts. The fibers absorb or subject it to more than moderate
and retain moisture; the soluble salts pressure when installing it in or removprovide electrical leakage paths that in- ing it from electronic equipment.
High-Voltage Precautions. In piccrease in conductivity as the humidity
increases. The resulting high leakage ture-tube circuits, high voltages may apcurrents may overload the high-voltage pear at normally low-potential points in
the circuit because of capacitor breakpower supply.
It is recommended, therefore, that down or incorrect circuit connections.
the uncoated bulb surface of all-glass Therefore, before any part of the circuit
picture tubes and the coated glass sur- is touched the power-supply switch
face and insulating supports for metal should be turned off, the power plug dispicture tubes be kept clean and free connected, and both terminals of any
from dust or other contamination such capacitors grounded.
X-Ray Radiation Precautions. All
as finger-prints. The frosted Filterglass
faceplate of the metal picture tubes may types of picture tubes may be operated
be cleaned with a soapless detergent, at voltages (if ratings permit) up to 16
such as Dreft, then rinsed with clean kilovolts without producing harmful
x-ray radiation or danger of personal
water, and immediately dried.
Corona Considerations. A high- injury on prolonged exposure at close
voltage system may be subject to corona, range. Above 16 kilovolts, special x-ray
especially when the humidity is high, shielding precautions may be necessary.
or
68
Interpretation
of Tube Data
The tube data given in the following TUBE TYPES SECTION include
ratings, typical operation values, characteristics, and characteristic curves.
The values for grid-bias voltages,
other electrode voltages, and electrode
supply voltages are given with reference
to a specified datum point as follows:
For types having filaments heated with
dc, the negative filament terminal is
taken as the datum point to which other
electrode voltages are referred. For types
having filaments heated with ac, the
mid-point (i.e., the center tap on the filament-transformer secondary, or the midpoint on a resistor shunting the filament)
is taken as the datum point. For types
having unipotential cathodes indirectly
heated, the cathode is taken as the
datum point.
Ratings are established on electron
tube types to help equipment designers
utilize the performance and service capabilities of each tube type to best advantage. Ratings are given for those characteristics which careful study and experience indicate must be kept within certain limits to insure satisfactory performance.
Three rating systems are in use by
the electron-tube industry. The oldest
is known as the Absolute Maximum
system, the next as the Design Center
system, and the latest and newest as the
Design Maximum system. Definitions of
these systems have been formulated by
the Joint Electron Tube Engineering
Council (JETEC)* and standardized by
the National Electrical Manufacturers
Association (NEMA) and the Electronic
Industries Association (EIA) as follows:
Absolute Maximum ratings are limiting values which should not be exceeded with any tube of the specified
type under any condition of operation.
These ratings are used only in rare instances for receiving types, but are gen·Now identified as the Joint Electron Device Engineering Council (JEDEC).
erally used for transmitting and industrial types.
Design Center ratings are limiting
values which should not be exceeded
with a tube of the specified type having
characteristics equal to the published
values under normal operating conditions. These ratings, which include allowances for normal variations in both
tube characteristics and operating conditions, were used for moit receiving
tubes prior to 1957. Unless specified
otherwise, ratings given in the TUBE
TYPES SECTION are based on the
Design Center System.
Design Maximum ratings are limiting values which should not be exceeded
with a tube of the specified type having
characteristics equal to the published
values under any conditions of operation. These ratings include allowances
for normal variations in tube characteristics, but do not provide for variations
in operating conditions. Design Maximum ratings were adopted for receiving
tubes in 1957.
Electrode voltage and current ratings are in general self-explanatory, but
a brief explanation of other ratings will
aid in the understanding and interpretation of tube data.
Heater warm-up time is defined as
the time required for the voltage across
the heater to reach 80 per cent of the
rated value in the circuit shown in Fig.
94. The heater is placed in series with a
~====~.
Fig. 9'
69
RCA Receiving Tube Manual
resistance having a value 3 times the
nominal heater operating resistance
(R = 3 EdIt), and a voltage having a
value 4 times the rated heater voltage
(V = 4 Er) is then applied. The warm-up
time is determined when E = 0.8 Er.
Plate dissipation is the power dissipated in the form of heat by the plate as
a result of electron bombardment. It is
the difference between the power supplied to the plate of the tube and the
power delivered by the tube to the load.
Grid.No.2(Screen.grid)Input is the
power applied to the grid-No.2 electrode
and consists essentially of the power dissipated in the form of heat by grid No.2
as a result of electron bombardment.
With tetrodes and pentodes, the power
dissipated in the screen-grid circuit is
added to the power in the plate circuit to
obtain the total B-supply input power.
When the screen-grid voltage is supplied through a series voltage-dropping
resistor, the maximum screen-grid voltage rating may be exceeded, provided
the maximum screen-grid dissipation
rating is not exceeded at any signal condition, and the maximum screen-grid
voltage rating is not exceeded at the
70
maximum-signal condition. Provided
these conditions are fulfilled, the screengrid supply voltage may be as high as,
but not above, the maximum plate voltage rating.
For certain voltage amplifier types,
as listed in the data section, the maximum permissible screen-grid (grid-No.2)
input varies with the screen-grid voltage,
as shown in Fig. 95. (This curve cannot
be assumed to apply to types other than
those for which it is specified in the data
section.) Full rated screen-grid input is
permissible at screen-grid voltages up to
50 per cent of the maximum rated screengrid supply voltage. From the 50-percent point to the full rated value of supply voltage, the screen-grid input must
be decre~ed. The decrease in allowable
screen-grid input follows a curve of the
parabolic form. This rating chart is useful for applications utilizing either a
fixedscreen-grid voltageoraseriesscreengrid voltage-dropping resistor. When a
fixed voltage is used, it is necessary only
to determine that the screen-grid input
is within the boundary of the operating
area on the chart at the selected value
of screen-grid voltage to be used. When
a voltage-dropping resistor is used, the
======- Interpretation of Tube Data =======
minimum value of resistor that will assure tube operation within the boundary
of the curve can be determined from the
following relation:
R
g.
> EOt (ECOt-EOt)
=
POt
resents its perveance, the pivot points
for several units (plotted to the same
scales) can be used to compare their
relative perveance.
For example, type 5U4GB has a
tube voltage drop (per plate) of 44 volts
at a plate current of 225 milliamperes.
where Rg2 is the minimum value for the
voltage-dropping resistor in ohms, Ee. is
the selected screen-grid voltage in volts,
Eee. is the screen-grid supply voltage in
o
7
volts, and Pe2 is the screen-grid input in
watts corresponding to E e2 •
a
Peak beater·cathode voltage is the
highest instantaneous value of voltage
4
that a tube can safely stand between its
heater and cathode. This rating is ap4
plied to tubes having a separate cathode
terminal and used in applications where
5U)
excessive voltage may be introduced
.!J
0
between heater and cathode.
7>
ow
Maximum dc output current is the
~
.~
highest average plate current which can
1..1
'"0..1
~9
be handled continuously by a rectifier
:; 0
tube. Its value· for any rectifier tube type
~7
is based on the permissible plate dissipa1!i
'"
tion of that type. Under operating con2
ditions involving a rapidly repeating
duty cycle (steady load), the average
S
plate current may be measured with a
a
dc meter.
4
The nomograph shown in Fig. 96
can be used to determine tube voltage
a
drop or plate current for any diode unit
1
when values for a single plate-voltage,
8
9
plate-current condition are available
I
from the data. It can also be used to
Fig. 96
12OM-1I244
compare the relative perveance (G=Ib/
Eb 3/2) of several diodes. Perveance can Convenient scales for this type are from
be considered a figure of merit for di- 1 to 100 volts for plate voltage and from
odes; high-perveance units have lower 10 to 1000 milliamperes for plate current. The points 44 volts and 225 millivoltage drop at a fixed current level.
Tube voltage drop or plate current amperes are then connected with a
for a specific diode unit can be deter- straight line to determine the pivot point.
mined as follows: First, convenient values Using this pivot point, it is easy to deare selected for the plate-voltage and termine such values as a plate current
plate-current scales of the nomograph. of 150 milliamperes at a tube voltage
The published plate-current and plate- drop of 33 volts, or a voltage drop of 25
voltage values are then located on the for a current of 100 milliamperes.
For readings in the order of one
scales and connected with a straight
edge. The intersection of the connect- volt and/or one milliampere, the nomoing line with the perveance scale is then graph is not accurate because of the
used as a pivot point to determine the effects of contact potential and initial
value of tube voltage drop correspond- electron velocity.
Maximum peak plate corrent is
ing to a desired current value, or the
value of plate current corresponding to the highest instantaneous plate current
a desired tube voltage drop. Because the that a tube can safely carry recurrently
pivot point for a specific diode unit rep- in the direction of normal current flow.
,
r
.
~:
~1
II
...
l
7l
RCA Receiving Tube Manual
The safe value of this peak current in
hot-cathode types of rectifier tubes is a
function of the electron emission available and the duration of the pulsating
current flow from the rectifier tube in
each half-cycle.
The value of peak plate current in
a given rectifier circuit is largely determined by filter constants. If a large
choke is used at the filter input, the peak
plate current is not much greater than
the load current; but if a large capacitor
is used as the filter input, the peak current may be many times the load current. In order to determine accurately
the peak plate current in any rectifier
circuit, measure it with a peak-indicating
meter or use an oscillograph.
Maximum peak inverse plate volt·
age is the highest instantaneous plate
voltage which the tube can withstand
recurrently in the direction opposite to
that in which it is designed to pass current. For mercury-vapor tubes and gasfilled tubes, it is the safe top value to
prevent arc-back in the tube operating
within the specified temperature range.
Referring to Fig. 97, when plate A
of a full-wave rectifier tube is positive,
current flows from A to C, but not from
B to C, because B is negative. At the instant plate A is positive, the filament is
positive (at high voltage) with respect to
plate B. The voltage between the positive filament and the negative plate B is
+,
Fig. 97
in inverse relation to that causing current flow. The peak value of this voltage
is limited by the resistance and nature
of the path between plate B and filament. The maximum value of this voltage at which there is no danger of breakdown of the tube is known as maximum
peak inverse voltage.
The relations between peak inverse
voltage, rms value of ac input voltage,
and dc output voltage depend largely on
the individual characteristics of the rec72
tifier circuit and the power supply. The
presence of line surges or any other
transient, or wave-form distortion, may
raise the actual peak voltage to a value
higher than that calculated for sine-wave
voltages. Therefore, the actual inverse
voltage, and not the calculated value,
should be such as not to exceed the rated
maximum peak inverse voltage for the
rectifier tube. A calibrated cathode-ray
oscillograph or a peak-indicating electronic voltmeter is useful in determining
the actual peak inverse voltage.
In single-phase, full-wave circuits
with sine-wave input and with no capacitor across the output, the peak inverse voltage on a rectifier tube is approximately 1.4 times the rms value of
the plate voltage applied to the tube. In
single-phase, half-wave circuits with
sine-wave input and with capacitor input to the filter, the peak inverse voltage
may be as high as 2.8 times the rms
value of the applied plate voltage. In
polyphase circuits, mathematical determination of peak inverse voltage requires
the use of vectors.
The Rating Chart for full-wave
rectifiers presents graphically the relationships between maximum ac voltage
input and maximum dc output current
derived from the fundamental ratings
for conditions of capacitor-input and
choke-input filters. This graphical presentation provides for considerable latitude in choice of operating conditions.
The Operation Characteristics
for a full-wave rectifier with capacitorinput filter show by means of boundary
line the limiting current and voltage
relationships presented in the Rating
Chart.
The Operation Characteristics
for a full-wave rectifier with choke-input
filter not only show by means of boundary line the limiting current and voltage relationships presented in the Rating
Chart, but also give some information
as to the effect on regulation of various
sizes of chokes. The solid-line curves
show the dc voltage outputs which would
be obtained if the filter chokes had infinite inductance. The long-dash lines
radiating from the zero position are
boundary lines for various sizes of chokes
as indicated. The intersection of one of
these lines with a solid-line curve indi-
S;;;;;;;;====== Interpretation oj Tube Data ======;;;;;
cates the point on the curve at which the
choke no longer behaves as though it
bad infinite inductance. To the left of
the choke boundary line, the regulation
curves depart from the solid-line curves
as shown by the representative shortdash regulation curves.
Typical Operation Values. Values
for typical operation are given for many
types in the TUBE TYPES SECTION.
These typical operating values are given
to show concisely some guiding information for the use of each type. These values should not be confused with ratings,
because a tube can be used under any
suitable conditions within its maximum
ratings, according to the application.
The power· output value for any
operating condition is an approximate
tube output-that is, plate input minus
plate loss. Circuit losses must be subtracted from tube output in order to
determine the useful output.
Characteristics are covered in the
ELECTRON TUBE CHARACTE~
ISTICS SECTION and such data should
be interpreted in accordance with the
definitions given in that section. Characteristic curves represent the characteristics of an average tube. Individual
tubes, like any manufactured product,
may have characteristics that range
above or below the values given in the
characteristic curves.
Although some curves are extended
well beyond the maximum ratings of the
tube, this extension has been made only
for convenience in calculations. Do NOT
operate a tube outside of its maximum
ratings.
Interelectrodecapacitances are direct capacitances measured between
specified elements or groups of elements
in electron tubes. Unless otherwise indicated in the data, all capacitances are
measured with filament or heater cold,
with no direct voltages present, and with
DO external shields. All electrodes other
than those between which capacitance
is being measured are grounded. In twin
or multi-unit types, inactive units are
also grounded.
The capacitance between the input
electrode and all other electrodes, except
the output electrode, connected together
is commonly known as the input capacitance. The capacitance between the out-
put electrode and all other electrodes,
except the input electrode, connected
together is known as the output capacitance.
Hum and noise characteristics of
high-fidelity audio amplifier tube types
such as the 7025 and the 7199 are tested
in an amplifier circuit such as that shown
in Fig. 98. The output of the test circuit
is fed into a low-noise amplifier. The
Fig. 98
bandwidth of this amplifier depends on
the characteristic being measured. If
hum alone is being tested, a relatively
narrow bandwidth is used to include both
the line frequency and the major harmonics generated by the tube under test.
In noise or combination hum-and-noise
measurements, the bandwidth is defined
in the registration of the tube type.
The amplifier gain is calibrated so
that the vacuum-tube voltmeter measures hum and noise in microvolts referenced to the grid of the tube under test. A
pentode can also be evaluated in this
manner by the addition of a screen-grid
supply adequately bypassed at the tube
screen-grid pin connection. Power-supply ripple at the plate of the tube under
test must be negligible compared to its
hum and noise output. Extraordinary
shielding of both the test socket and the
associated operating circuit is required
to minimize capacitances between heater
leads and high-impedance connections.
The test-circuit components are determined by the tube type being tested
and the type of hum to be controlled.
Heater-cathode hum can be eliminated
from the measurement by closing S..
The circuit can also be made more or
less sensitive to heater-grid hum by increasing or decreasing the grid resistance
R g • No circuit changes affect the component of magnetic hum generated by
the tube.
73
GRID
NO. 2
GRID
NO.1
BEAM·
CONFINING
ELECTRODE
\
fLATE
CATHODE
\
I
.'
.. ":::'~••
GLASS
ENVELOPE
INSULATJNG
SPACER
HEATER
I
cfBB
GRID
RADIATOR
\Q
GrnER
ANO~\
CAGE
ASSEMBLY
,ft·
",.I!'1"'
BUTTON
STEM
ASSEMBLY
Parts of a Novar Tube.
74
/
INSULATING
SPACER
Application Guide
for RCA Receiving Tubes
In the Application Guide on the following pages, RCA receiving tubes are
classified in two ways: (a) by function,
and (b) by structure (diode, triode, etc.).
The functional classification covers 38
principal types of application, as listed
below.
Tube types are grouped by structure under each classification; they are
also keyed to indicate miniature, octal,
nuvistor, and novar types.
Triodes are designated as low-, medium-, or high-mu types on the following
basis: low, less than 10; medium, 10 or
more, but less than 50; high, 50 or more.
Where applicable, tubes are designated
as sharp-, semiremote, or remote-cutoff on
the basis of the ratio, in per cent, of the
negative control-grid voltage to the
screen-grid voltage (or, for triodes, the
plate voltage) as given in the characteristics or typical operation values. These
terms are defined as follows: sharp, less
than 10 per cent; semiremote, 10 or more,
but less than 20 per cent; remote, 20 per
cent or more.
For more complete data on these
types, refer to the TECHNICAL DATA
FOR RCA RECEIVIN G TUBES starting on page 83.
APPLICATIONS:
1. Audio-Frequency
Amplifiers
2. Automatic Gain Control
(AGC and AVC) Circuits
3. Burst Amplifiers
4. Cathode-Drive RF Amplifiers (Grounded-Grid)
5. Color Killers
6. Color Matrixing Circuits
7. Complex-Wave
13.
14.
15.
16.
17.
18.
19.
20.
21.
8. Converters
22.
9. Dampers
10. Demodulators (Color TV) 23.
24.
11. Detectors
12. DC Restorers
25.
Generators
Discriminators
Frequency Dividers
FM Detectors
Gated Noise, AGC, and
Sync Amplifiers
Harmonic Generators
Horizontal-Deflection
Circnits
Intermediate-Frequency
Amplifiers
Limiters
Mixers-RF
Mixer-Oscillators-RF
Multivibrators
Noise Inverters
Oscillators
1. AUDIO.FREQUENCY
AMPLIFIERS
26. Phase Inverters
27. Phase Splitters
28. Radio-Frequency
Alllplifiers
29. Reactance Circuits
30. Rectifiers
31. Regulators
32. Relay Control Circuits
33. Sync Amplifiers
34. Sync Clippers
35. Sync Separators
36. Tnning Indicators
37. Vertical-Deflection
Circuits
38. Video Amplifiers
High-Mu Triode
o 12SF5
igh-Mu Triode with Twin Diode
Voltage Amplifiers
Medium-Mu Triode with Twin Diode
.6BF6
o6SR7
• 12BF6
0
12SR7
Medium.Mu Triode-Sharp-Cutoff Pentode
07199 t
• SA V6
• 4A V6
o6AT6
o6AV6
o6BN8
o6CN7
o6SQ7
o6SQ7GT
o 12AT6
o12AV6
o 12SQ7
0 12SQ7GT
o 14GT8
o 18FY6
o18FY6A
High-Mu Triode with Triple Diode
• 5T8
o6T8A
0
19T8
High-Mu Twin Triode
Medium-Mu Twin Triode
o 5J6
o6J6A
o 6SN7GTB
.7AU7
o9AU7
0 12AU7 A
• Miniature
o Octal
o 12SN7GTA
o 19J6
L>Nuvistor
o6EU7t
o6SL7GT
0 12AX7 t
o12AX7At
o12AZ7
o 12AZ7A
0 I2BZ7
• Novar
t For high-fidelity equipm.ent.
o 12SL7GT
o20EZ7
o 7025t
75
====== RCA Receiving Tube Manual
Sharp-Cutoff Pentode
8SDT6A*
84DT6A*
8SGX6"
Shar.p-Cutoff Twin Pentode
86DT6A*
86GX6*
86HZ6*
.3BUS
.3GSS
8SS79t
.7S43t
itemo'e-Cutoff Pentode with Diode
812CR6
.4BUS
84GSS
86BUS
.6HSS
3. BURST AMPLIFIERS
Medium-Mu Triode-Sharp-Cutoff Pentode
Power Amplifiers
8 SEAS
.SGHS
Power Triode
2AS
8 6EAS
.6GHS
8 6GHSA
High-Mu Triode with Twin Diode.
.6BNS
'Beam Power Tube
.SAQS
8SCZS
oSV6GT
• 6AQSA
86ASS
• 6CM6
• 6CUS
• 6CZS
o 6DG6GT
• 6DSS
.6GCS
o 6FES
o6L6
o6L6GBt
o6L6GCt
o6V6
o6V6GTA
o6W6GT
o6Y6G
8 12ABS
• 12AQS
8 12CAS
8 12CUS/12CS
0 12L6GT
o12V6GT
o12W6GT
82SCS
82SFSA
.S4GDS
8S4GDSA
.SSBS
8SSCS
o3SL6GT
• SOBS
8S0CS
oSOFES
o.SOL6GT
86973t
o7027At
o740St
4. CATHODE-DRIVE RF AMPLI.
FIERS (GROUNDED.GRID)
Medium-Mu Triode
86BC4
Medium-Mu Twin Triode
.4BCS
84BQ7A
.4BSS
.4BZ7
8SBK7A
8SBQ7A
86BCS
86BK7A
86BQ7A
86BSS
86BZ7
86FWS
.6AB4
1>6DS4
High-Mu Triode
Power Pentode
.6BQS
8 6EHS
o6F6
.6GK6
o6K6GT
8SBQS
8 12EHS
.2SEHS
8SSEHS
8S0EHS
8S0FKS
.60FXS
871S9t
.7S6St
2. AUTOMATIC GAIN CONTROL
CIRCUITS (AGC & AVC)
I> 6CW4
High-Mu Twin Triode
• 6DTS
• 12AT7
• 12AZ7
8 12AZ7A
812DTS
5. COLOR KILLERS
Quadruple Diode
.61US
Diode-Sharp-Cutoff Pentode
8 6KLS
1>2CW4
2DS4
I>
8 12KLS
Diode-Remote-Cutoff Pent ode
8 6EQ7
• 12EQ7
8 20EQ7
Twin Diode-Medium-Mu Triode
86BF6
o6SR7
812BF6
6. COLOR MATRIXING CIRCUITS
Medium-Mu Twin Triode
o12SR7
.6CG7
.6FQ7
86GU7
8SCG7
8SFQ7
812BH7A
Twin Diode-High-Mu Triode
o12SQ7
7. COMPLEX.WAVE GENERA•
ca12SQ7GT
TORS
81SFY6
.lSFY6A
High-Mu Twin Double-Plate Triode
.12FQS
Medium-Mu Triode-Sharp-Cutoff Pentode
• SANS
.6BASA
• 6CUS
Sharp-Cutoff Twin-Plate Tetrode-Diode
8SGHS
86BHS
86GHS
86FA7
.6ANSA
86CHS
86GHSA
.6AZS
Sharp-Cutoff Three-Plate Tetrode-Diode
.6KMS
• SAV6
.4AV6
86AT6
86AV6
o6SQ7
o6SQ7GT
.12AT6
812AV6
High-Mu Triode-Sharp-Cntoff Pentode
.6AWSA
AJVS
• Miniature
76
8SAWSA
8S1VS
Three-Plate Tetrode-Medium-Mu Triode
.6FHS
0
Octal
t> Nuvistor
.. Novar
* Dual·control gride t For high-fidelity equipment
======== Application Guide ========
Twin Diode-Medium-Mu Triode
8. CONVERTERS
Medium-Mu Triode-Sharp-Cutoff Pentode
o 5EA8
o 5GB8
05KE8
05U8
0 5X8
0 6EA8
06GB8
06GB8A
0 6KE8
0 6U8A
06X8
o 19X8
High-Mu Twin Triode
06DT8
o 12AT7
o 12AZ7
o 12AZ7A
o 12DT8
o 18GD6A
o 12BA7
o 12BE6
o 12SA7
o 12SA7G
o 18FX6
o 18FX6A
03AV6
04AV6
o 6AT6
06AV6
o 6BN8
06CN7
06SQ7
06SQ7GT
o 12AT6
o 12AV6
Triple Diode-High-Mu Triode
06T8A
o6W4GT
o 12AX4GTA
o 12AX4GTB
o 12AY3
o 12BS3
o 12D4
o 12DM4
o 17AX4GT
o 17AX4GTA
o 17AYS
o 17BBS
06JU8
o5GX6"
06DT6A"
o6GX6°
o6BZ6"
12_ DC RESTORERS
o 17BS3
o 17D4
o 17DE4
o 17DM4
o 19AU4
o 19AU4GTA
• 22BB3
o 22DE4
o 25AX4GT
Diode-Sharp-Cutoff Pentode
05AM8
05AS8
06AM8A
06BJ7
13. DISCRIMINATORS
FM
Twin Diode
06AL5
o 12AL5
Twin Diode-High-Mu Triode
o 6BN8
Medium-Mu Twin Triode
o6AS8
Triple Diode
oSAL5
10. DEMODULATORS (COLOR TV)
0
14GT8
Triple Diode-High-Mu Triode
o 12BB7A
o 5T8
High-Mu Twin Triode
0
12AZ7A
oSBN6
o4BN6
o6BN6
Sharp-Cutoff Pentode
oSDT6A*
04DT6A"
05GX6*
06BY6
n. DETECTORS
o 5GY6*
o 6DT6A"
06GX6*
06GY6"
06BZ6"
04BN6
06BN6
Beam Tube
Diode-Sharp-Cutoff Pentode
06KL8
o 12KL8
oSBN6
Horizontal AFC
Twin Diode-High-Mu Triode
Diode-Remote-Cutoff Pentode
0 12EQ7
o19T8
FM Quadrature-Grid
o6GY6
Pentagrid Amplifier
o6AM8A
o6AS8
06T8A
Beam Tube
Sharp-Cutoff Pentode
o 6EQ7
o 12CR6
ol9T8
Quadruple Diode
oSDT6A*
o 4DT6A"
Half-Wave (Diode)
05AM8
o5AS8
o 12SQ7
012SQ7GT
014GT8
o18FY6
o18FY6A
Sharp-Cutoff Pentode
9_DAMPERS
o 12AZ7
0 12SR7
Twiu Diode-High-Mu Triode
o 5T8
06BA7
06BE6
06SA7
06SA7GT
12BF6
06B17
0 12AU6
Pentagrid
06AU4GTA
06AX4GT
06AX4GTB
06AY3
.6BA3
.6BB3
.6BSS
06CQ4
06DA4
06DE4
06DM4
.6DW4
0
Triple Diode
Sharp-Cutoff Pentode
o 6AU6
o 6BF6
06SR7
0 20EQ7
06BN8
06CN7
14. FREQUENCY DIVIDERS
Twiu Diode
oSAL5
06AL5
06B6
o 12AL5
o 12B6
• Miniature
o Octal
t>Nuvistor
High-Mu Twin Double-Plate Triode
o 12FQ8
... Novar
• Dual-control grid,
77
====== RCA Receiving Tube Manual ======
15. FM DETECTORS
High.Mu Triode-Sharp.Cutoff Pentode
(See 13. DISCRIMINATORS)
16. GATED NOISE, AGC, AND
SYNC AMPLIFIERS
High·Mu
Triode-Sharp.Cu~off
o6KAS
oSKAS
Pentode
Sharp.Cutoff Pentode
o6GY6*
Pentagrid Amplifier
o3BY6
03CS6
06BY6
06CS6
17. HARMONIC GENERATORS
(See 7. COMPLEX.WAVE GENERATORS)
o 6AWSA
o 6GNS
06HFS
06JVS
0 6KVS
0 SAWSA
oSGNS
0 SJVS
0 10HF8
oUKV8
Sharp·Cutoff Pentode
03AU6
03CB5
03CB6
03CF6
03DK6
03JC6
03JD6°
04AU6
04CB6
04EW6
04JC6
o 4JD6"
05EW6
o6AB7
06AC7
06AGS
06AH6
06AKS
06AU6
06AU6A
06BCS
06CB6
06CB6A
06CF6
06DC6
06DE6
06DK6
06EJ7
06EW6
06HS6
06JC6
06JD6°
o 12AU6
o 12AW6
o 18GD6A
o 19H86
Sharp.Cutoff Pentode with Diode
18. HORIZONTAL.DEFLECTION
CIRCUITS
Oscillators
Medium.Mu Triode-Sharp.Cutoff Pentode
oSGHS
06GHS
06GHSA
Medium.Mu Twin Triode
o6CG7
06FQ7
06SN7GTB
07AU7
oSCG7
oSFQ7
09AU7
06GW6
~6JE6
o 12AVSGA
o 12BQ6GTB/
12CU6
o 12DQ6A
o 12DQ6B
~ 12GJS
• 12GTS
o 12GW6
• 12JB6
0 6KLS
o 12KL8
Semiremote·Cutoff Pentode
03BZ6
04BZ6
05GM6
06BZ6
06BA6
06SK7
06SK7GT
06EH7
06GM6
06HR6
06JH6
o 12BZ6
o 19HR6
o 12BA6
o 128K7
o 12SK7GT
01SFW6
01SFW6A
Remote·Cutoff Pentode with Diode
o 6EQ7
Beam Power Tube
~6JB6
0 6AMSA
06ASS
Remote·Cutoff Pentode
o 12AU7
o 12BH7A
o 12SN7.
GTA
Amplifiers
o6AUSGT
06AVSGA
06BG6A
06BQ6GTB/
6CU6
o6CBSA
06CD6GA
06DN6
06DQS
06DQ6B
06EX6
.6GJS
.6GTS
o 5AMS
o SASS
0
12EQ7
0 20EQ7
20. LIMITERS
o 17BQ6.
Beam Tube
GTB
o3BN6
04BN6
o 17DQ6B
~ 17GJS
Sharp.Cutoff Pentode
~ 17GTS
03AU6
06GX6
o 17GW6
06H86
.4AJT •
~ 17JB6
05GX6
06HZ6
~ 22JG6
06AU6A
06SH7
o 25AVSGA
o 25BQ6.
Sharp.Cutoff Pentode with Diode
o 6KLS
0 12KL8
GTB/25CU6
o2SCD6GB
o 25DN6
21. MIXERS-RF
06BN6
o 12AU6
o 128H7
o 19H56
Medium.Mu Twin Triode
19. INTERMEDIATE.FREQUENCY
AMPLIFIERS
Medium,Mu Triode-Sharp·Cutoff Tetrode
05CQS
06CQS
Medium.Mu Triode-Sharp.Cutoff Pentode
o 5ANS
06ANSA
06AUSA
06AZS
06BHS
06CHS
• Miniature
0 Octal
• Dual-control grid.
78
po. Nuvistor
o 5J6
06J6A
o 12AV7
o 19J6
06AB4
1>6CW4
High,Mu Triode
~2CW4
22. MIXER.OSCILLATORS-RF
06CUS
06CXS
oscxs
Medium·Mu Triode-Sharp.Cutoff Tetrode
.. NovaI'
• Approaches semiremote-cutoff characteristic;
used in first-if amplifier applications
• 5CLSA
oSCQS
0 6CLSA
0 6CQS
========- Application Guide =======_...
Medium-Mu Triode-Sharp-Cutoff Pentode
05ATS
05BS
o 5BRS
05CGS
05EAS
05KES
05US
05XS
06ATSA
06BRSA
06CGSA
06EAS
06FG7
06KES
06USA
06XS
o 19EAS
o 19X5
High-Mu Twin Triode
o 6DTS
012AT7
o 12DTS
Triode-Hexode
o6KS
o 12KS
Medium-Mu Triode-Sharp-Cutoff Pentode
06GHS
06GHSA
07AU7
09AU7
012AU7A
012AX7A
26. PHASE INVERTERS
Medium-Mu Triode-High-Mu Triode
o 12DW7
Medium-Mu Twin Triode
06CG7
06GU7
o6SN7GTB
07AU7
09AU7
o 12AU7A
o 12SN7.
GTA
o 6A WSA
06EBS
06GNS
06H1<'8
08AWSA
oSEBS
0 SGNS
010HF8
High-Mu Twin Triode
Medium-Mu Twin Triode
06CG7
06GU7
o6SN7GTB
o 12AX7
High-Mu Triode-Sharp-Cutoff Pentode
23. MULTIVIBRATORS
05GHS
High-Mu Twin Triode
o 12SN7_
GTA
o 6SC7
o 6SL7GT
o 12AX7
0 12AX7 A
o 12SC7
o J2SL7GT
07025
High-Mu Twin Triode
o 12AX7
0 12AX7 A
27. PHASE SPLITTERS
24. NOISE INVERTERS
Medium-Mu Triode-Sharp-Cutoff Tetrode
High-Mu Triode-Sharp-Cutoff Pentode
06KAS
0 SKAS
05CQS
06CQ8
Medium-Mu Triode-Sharp-Cutoff Pentode
o 5ANS
06ANS
06AZS
Sharp-Cutoff Pentode
06GY6*
25. OSCILLATORS
0 6BASA
06CH8
0 6CUS
07199
High-Mu Triode-Sharp-Cutoff Pentode
06AWSA
Radio Frequency-UHF
oSAWSA
Medium-Mu Triode
02AF4B
1>2DV4
02DZ4
03AF4A
03DZ4
06AF4
06AF4A
1>6DV4
.6DZ4
Medium-Mu Triode
Radio Frequency- VHF
02BN4A
03BN4A
Medium-Mu Twin Triode
o 5J6
06J6A
o 12AV7
28. RADIO-FREQUENCY
AMPLIFIERS
o 19J6
06AB4
o 6C4 (Class C)
Low Frequency, Sweep Type
Medium-Mu Triode-Sharp-Cutoff Pentode
0 611A8A
0 6BHS
06CHS
0 6CU8
0 6CXS
oSCXS
High Mu Triode with Twin Diode
o 6BNS
06CN7
• Miniature
ollAWSA
o Octal
04BCS
04BQ7A
04BSS
04BZ7
05BK7A
05BQ7A
o 5J6
06BCS
06BK7B
06BQ7A
06BSS
06BZ7
06FWS
06J6A
o 12AV7
o 19J6
06AB4.
1>6CW4
1>6DS4.
06ER5
06FH5
06FQ5A
06GK5
I> 13CW4.
High-Mu Triode
1>2CW4
1>2DS4
02FH5
03GK5
High-Mu Twin Triode
High-Mu Triode-Sharp-Cutoff Pentode
06AWSA
06CQS
Medium-Mu Twin Triode
Power Triode
o 5ANS
o 6ANSA
06AUSA
o 6AZS
06BN4A
Medium-Mu Triode-Sharp-Cutoff Tetrode
o 5CQS
High-Mu Triode
06BC4
t>Nuvistor
06DTS
o 12AZ7
.. Novar
012AZ7A
o 12DT8
• Dual-control grids
79
====== RCA Receiving Tube Manual
High-Voltage Types (For rf-rectifier or
pulsed low-current applications)-Vacuum
Power Triode
o 6C4 (Class C)
Sharp-Cutoff Tetrode
o2CY5
oSCY5
o6CY5
Sharp-Cutoff Pentode
oSAU6
• SBC5
oSCB6
.SCF6
o4AU6
o4CB6
o6AB7
o6AC7
o6AG5
o6AK5
o6AU6A
o6BC5
o6BH6
o6CB6
o6CB6A
o6CF6
o6DC6
Sharp-Cutoff Pentode with Diode
o 6KL8
• 12KL8
Semiremote-Cutoff Pentode
o 6SG7
o 12SG7
Remote-Cutoff Pentode
o SBA6
o6BA6
o6BJ6
o6SK7
o6SK7GT
o 12BA6
o 12SK7
Medium-Mn Triode-Sharp-Cutoff Pentode
o 6AU8A
o6AZ8
Remote-Cutoff Pentode with Diode
o 6EQ7
0
12EQ7
0
20EQ7
Medium-Mu Triode-Sharp-Cutoff Pentode
o 5AN8
o6AN8A
6AZ8
o6BA8A
0
6CH8
o6CU8
0
High-Mu Triode with Twin Diodes
o6CN7
6CX8
• 8CX8
Medium-Mu Twin Triode
o6CG7
29. REACTANCE CIRCUITS
0
o7AU7
o12AU7A
High-Mu Triode with Twin Diode
o6CN7
High-Mu Triode-Sharp-Cutoff Pentode
o 6AW8A
o6JV8
o8AW8A
o8JV8
High-Mu Twin Triode
o 12BZ7
High-Mu Triode-Sharp-Cutoff Penlode
o6AW8A
o8AW8A
34. SYNC CLIPPERS
30. RECTIFIERS
Medium-Mn Triode-Sharp-Cutoff Tetrode
Power-Supply Types-Vacuum
Medium-Mu Triode-Sharp-Cutoff Pentode
o 5CQ8
Half-Wave (Diode)
o S5W 4
oS5Z5GT
S6AMSA
oS6AMSB
0
o50DC4
• Miniature
80
05VSA
o5VG4
o5V4GA
o5XG4
o5YSGT
05Y4GT
o6AZ8
0 6CH8
o6CU8
o6CX8
0 8CX8
High-Mu Triode-Sharp-Cutoff Peutode
Full-Wave (Twin Diode)
oSDG4
o 5AS4A
.5BCS
05DJ4
05U4G
05U4GB
.5AN8
o 6AN8A
o6AU8A
o6CQ8
o5Z4
06AX5GT
o6CA4
o6X4
06X5GT
o 12X4
o Octal
o 6AW8A
o6EB8
o6GW8
o6HF8
.6JV8
o8AW8A
o8EB8
o8GN8
o8JV8
o10HF8
High-Mu Twin Triode
o 12BZ7
t>Nuvislor
... Novar
======== Application Guide ========
Medium-Mn Dnal Triode
Sharp-Cntoff Twin Pentode
.SBUS
.SGS8
.4BUS
.4GS8
.6BUS
.6HS8
.6CS6
.6BY6
35. SYNC SEPARATORS
Medium-Mn Triode-Sharp-Cntoff Tetrode
• SCQS
• 6AZS
.6CHS
.6CU8
.6CX8
• 6GH8
.6GHSA
.scxs
• 12AU7 A
.7AU7
High-Mn Triode with Twin Diode
.6CN7
• 6KA8
.6KVS
.SAWSA
.SEBS
.SGNS
• SJVS
• SKAS
.lOHFS
.llKVS
High-Mu Twin Triode
.4BUS
84GSS
.6BUS
86HSS
Pentagrid Alnplifier
86BY6
.l2B4A
• 6S4A
8 SAQS
8 SCZS
oSV6GT
.6EM5
.SEMS
• 6AQSA
.6CM6
.6CZS
Power Pentode
o6K6GT
8 SANS
86ANSA
86AUSA
.6AZS
• 6BASA
.6BHS
86CH8
• 6CUS
.6CXS
8SCXS
86CS6
High-Mn Triode-Sharp-Cutoff Pentode
86AWSA
8 6EBS
.6GNS
.6HFS
36. TUNING INDICATORS
Indicator with Triode Unit
6ES
Amplifiers
Low-Mu Triode
Medium-Mn Triode-Sharp-Cutoff Pentode
Sharp-Cutoff Twin Pentode
8SBY6
8SCS6
High-Mn Triode-Beam Power Tube
38. VIDEO AMPLIFIERS
.12BZ7
.SBUS
.SGSS
• lOGF7'
o l3EM7
.lSFD7
• lSGJ<'7'
Beam Power Tube
High-Mu Triode-Sharp.Cutoff Pentode
• 6AWSA
.6EBS
.6GNS
.6HFS
.6JVS
• 6GF7
o6GL7
.lODR7
o lOEM7
Medium-Mu Triode
Medium-Mu Twin Triode
.6CG7
.6CY7
.6DR7
.6EA7
o6EM7
.6FD7
.lSKYS
.6CQS
Medinm-Mn Triode-Sharp-Cntoff Pentode
• SANS
.SGHS
.6ANSA
.6AUSA
.SCM7
.6CS7
High-Mn Triode-Low-Mu Triode
Pentagrid Alnplifier
.SBY6
.SCS6
.6CM7
6US
.6JVS
• 6KVS
8 SAWSA
.SEBS
8 SGNS
• SJVS
• lOHFS
811KV8
Sharp-Cntoff Pentode
Twin Indieator Units
812BY7A
o6AF6G
Sharp-Cutoff Pentode with Diode
37. VERTICAL.DEFLECTION
CIRCUITS
Oscillators and Amplifiers (Combined)
8SAMS
8 SASS
86AMSA
.6ASS
Beam Power Tube
.2SBKS
Medium-Mu Triode-Low-Mu Triode
.6DE7
.6EW7
• Miniature
.lODE7
81SDE7
Power Pentode
o6AG7
o Octal
t>Nuvislor
.6CL6
86GK6
.. Novar
For information on picture tubes, refer to the RCA PICTURE TUBE CHAR·
ACTERISTICS CHART at the end of the TECHNICAL DATA section.
81
1-Glass Envelope
2-lnternal Shield
3-Plate
4-Grid No.3 (Suppressor)
5-Grid No.2 (Screen)
6-Grid No.1 (Control Grid)
7-Cathode
a-Heater
9-Exhaust TIp
10-GetterO
11 -Spacer Shield Header
12-lnsulating Spacer
13-Spacer Shield
14-lnter-Pin Shield
15-Glass Button-Stem Seal
16-Lead Wire
17 -Base Pin
18-Glass-to-Metal Seal
Structure of a Miniature Tube
82
Technical Data
for RCA Tube Types
This section contains technical descriptions of RCA tubes used in standard
broadcast, FM, and television receivers, in audio amplifiers, and in many other
diverse applications. It includes data on current types, as well as information on
those RCA discontinued types in which there may still be some interest. Unless
otherwise specified, the ratings given are based on the Design Center system. Information on picture tubes is shown at the end of this section.
In choosing tube types for the design of new electronic equipment, the designer
should refer to the APPLICATION GUIDE FOR RCA RECEIVING TUBES
on pages 75 to 81.
Tube types are listed in this section according to the numerical-alphabeticalnumerical sequence of their type designations. For Key: Basing Diagrams, see
inside back cover.
DIODE
~
c
4
,
Ie
1\ 3
6 p
," 2
_',
7 H
CI
~p~Ga
~G3
r-
F.
\ : - -
Miniature type used as deteetor tube in
portable FM receivers and in portable highfrequency measuring equipment. Outline 7B,
OUTLINES SECTION. Tube requires miniature seven-contact socket. Heater volts (ael
de), 1.4; amperes, 0.15. Maximum ratings for
half-wave rectifier service: peak inverse plate
volts, 330 max; peak plate rna, 5 max; de output rna., 0.6 max; peak heater-cathode volts,
140 max. This type is used principally for renewal purposes.
lA3
REMOTE-CUTOFF PENTODE
Glass type used in battery-operated receivers as rf or if amplifier. This type is similar
electrically to type 1D5-GP. Outline 24B, OUTLINES SECTION. Tube requires four-contact
socket. Filament volts (dc), 2.0; amperes, 0.06.
Type 1A4-P is a DISCONTINUED type listed
for reference only.
lA4P
POWER PENTODE
C~4
~
,GI
Glass octal type used in output stage of bat.tery-operated receivers. Outline 14C, OUTLINES SECTION. This type may be supplied
with pin No.1 omitted. Tube requires octal socket
and may be mounted in any position. For filament
considerations, refer to type 1U4. Filament volts
(dc), 1.4; amperes, 0.05. Typical operation as
,
8
class Al amplifier: plate and grid-No.2 volts, 90
NC
NC
(110 max); grid-No.1 volts, -4.5; peak af gridNo.1 volts, 4.5; plate ma., 4.0; grid-No.2 ma., 1.1; plate resistance (approx.), 0.3 megohm; transcon_
ductance, 850 /Lmhos; load resistance, 25000 ohms; power output, 115 milliwatts. Type 1A5-GT i8 used
principally for renewal purposes.
,: : :c, ,:;
lA5GT
83
R.CA Receiving Tube Manual
PENTAGRID CONVERTER
lA6
GI... type used in battery-operated reo
eelvers. This type is identical electrically with
type 1D7-G, except for interelectrode capacitances. Outline UB, OUTLINES SECTION.
Tube requires six-contact socket. Filament volts
(de), 2.0: amperes, 0.06. Type 1A6 is a DISCONTINUED type listed for reference only.
PENTAGRID CONVERTER
Glass octal type used in superheterodyne
circuits having battery power supplies. Outline
16A, OUTLINES SECTION. Tube requires octal socket and may be mounted in any position.
Filament volts (de), 1.4: amperes, 0.06. Typical
operation as converter: plate and grid-N 0.2 volts,
90 (110 mao:); grids-No.S-and-No.6 supply volts,
110mao:;grids-No.8-and-No.6 volts, 46 (60mao:);
grid-No.4 volts, 0: grid-No.1 resistor, 0.2 megohm;"late resistance (approx.), 0.6 megohm: plate ma., 0.6: grids-No.8-and-No.6 ma., 0.7: grid-No.2
ma., 1.2; grid-No.1 ma., 0.OS6: total cathode ma., 2.6 (4 mao:): conversion transconductance, 260
_mhos. This type is used principally for renewal purposes.
1A7GT
POWER PENTODE
,.
Subminiature type used in output stage of
small, compact, battery-operated receivers for
the standard AM broadcast band. Maximum
dimensions: over-all length, 1.76 inches: seated
height, 1.6 inches; diameter, 0.4 inch. Tube requires subminiature eight-contact BOcket. Fila..
ment volts (dc), 1.25: amperes, 0.04. Filament
voltage should never exceed 1.6 volts. Typical
Ne
operation as Class A. amplifier: plate and gridNo.2 volts, 67.5 mao:; grid-No.1 volts, -4.6; peak af grid-No.1 volts, 4.6; zero-signal plate ma., 2; zerosignal grid-No.2 ma., 0.4: cathode ma., 4 mao:; plate resistance, 0.16 megohm; transconductance,760
"mhos; load resistance, 26000 ohms: total harmonic distortion, 10 per cent: maximum-signal power output, 60 milliwatts. This is a DISCONTINUED type listed for reference only.
lACS
HALF-WAVE VACUUM RECTIFIER
LC
Duodecar type used to supply
power to the anode of the picture tube
in television receivers. Outline 16A,
OUTLINES SECTION. Tube requires duodecar twelve-contact socket
F, IS
F
and may be mounted in any position. Socket terminals 4 and 10 may be used as
tie points for components at or near filament potential. Filament volts (ac/dc),
1.25; amperes, 0.2.
lAD2
PULSED RECTIFIER
For operation in a 61l6-line, SO-frame 81/8tem
Maximum Ratings, (De8igft-Mao:imltm Values):
PEAK INVERSE PLATE VOLTAGE# ••••••••••••••••••••••••••••••••••••••
PEAK PLATE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
AVERAGE PLATE CUBBENT ••••••••••••••••••••••••••••••••••••••••••.•
26000."....,
60 mao:
0.6 mao:
volts
ma
ma
Characteristics, Instantaneous Value.
Tube Voltage Drop for plate current of 7 ma •• ~ •••• '" •••••••••••• '" ••
226
volts
# The duration of the volIfage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
626-line, SO-frame system, 16 per cent of one horizontalseanning cycle is 10 microseconds.
• The dc component.must not exceed 22000 volts.
84
========= Technical Data =========
SHARP-CUTOFF PENTODE
Subminiature type used al rf or if amplifier
In stagea not controlled by ave In omall, compact, battery-operated receivers for the standard AM broadeaat band. Maximum dimenslona:
over-a1l length, 1.75 inchea; seated height, 1.5
Inchea; diameter, 0.4 inch. Tube requirea lubminiature elght-eontaet socket. Filament volts
(de), 1.25; amperes, 0.04. Filament voltage
N
should never exceed 1.6 volts. Characteriatiea
as cla.. AI amplifier: plats and grid-No.2 volts, 67.5 maa:: grid-No.1 volts, 0; plate resistance, 0.7 megohm; transconductance, 785 "mhos; total cathode ma., 4 maa:: plate ma.,l.85; grid-No.2 ma., 0.75. This
is a DISCONTINUED type listed for reference only.
1AD 5
HALF-WAVE VACUUM RECTIFIER
Miniature type used al rectifier of highvoltage pulses produced In the scanning aysteml
of television receivers. Outline 9A, OUTLINES
SECTION. Tube requirea miniature nine-eontaet locket. Socket termlnall 8 and 7 may be
connected to the filament, or used al tie points
forthefllament-dropplngresistor;otherwisethey
should not be used. Filament volts (ae), 1.4;
ampere&, 0.65. Maximum ratings as pulsed rectifier in 525-line, SO-frame system: peak inverse plate volts (absolute maa:imum), 25000 _
(de 20000
maa:); peak plate ma., 11 _ : average plate ma., 1 _ . For filament and high-voltage considerations,
refer to type 1B3-GT. Type 1AX2 il uaed principally for renewal purpolel.
1AX2
HALF-WAVE VACUUM RECTIFIER
Glass octal type used in high-voltage,
low-current applications such as the
rectifier in a high-voltage, rf-operated
power supply or as a rectifier of highvoltage pulses produced in television
scanning systems,
lB3GT
FILAMENT VOLTAGE (AC/DC). • • • ••••••••••••••••••••••••••••••••••••••
1.25"
volt.
FILAMENT CURRENT................................................
0.2
ampere
DIRECT INTERELECTRODE CAPACITANCE (Approx.):
Plate to Filament and Internal Shield. • • • • • . • • • • • . • • • • • • • • • • • • • • • • • •
1. 8
pf
.. Under DO circum.tan..... should the filament voltage be less than 1.05 volts or IIreater than 1.45 volt..
PULSED RECTIFIER
For operation in a 6'6-1in., 'D-fram.
81/"_
Maximum Ratings, (D ..ign-Maa:imum Valu ..):
PEAIC INVERSE PLATE VOLTAGE· ••..•••••••••••••••••••••••• " •••• •• •••
PEAK PLATE CURRENT. • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
AVERAGEPLATECURRENT............................................
26000·mC121
50 maz
0.5_
volts
ma
ma
Characteristics, Instantaneaus Value.
Tube Voltage Drop for plate current of 7 ma ••••••••••••••••••••••••.• _
100
volts
RADIO-FREQUENCY RECTIFIER
Maximum Ratings, (Design-M=mum Valu ..):
PEAIC INVERSE PLATE VOLTAGE.. •• •• .• •• •• •• •• •• •• •••• •• •••• •••• •••••
88000 maz
volt.
PEAIC PLATE CUBBIINT...............................................
85 _
ma
AVERAGE PLATE CURRENT............. •••••• •••••• •••••• •••••••••••••
1.1_
ma
FREQUENCY RANGE 0" SUPPLY VOLTAGE................................
1.5 to 100
Kc
• The duration of the voltage pulee must not exceed 15 per cent of one horizontal lcanning cYcle. In a
52S-line, 80-frame system, 15 per cent of one horizontal scanning cYcle is 10 mlcroaeconds.
• The de component must not exceed 22000 volt..
INSTALLATION AND APPLICATION
Type lB3-GT requires an octal socket and may be mounted in any position.
Plate connection is cap at top of bulb. Socket terminals I, 3, 4, 5, 6, and 8 may be
connected to socket terminal 7 or to a corona shield which is connected to socket
terminal 7. Socket terminals 4 and 6 may be 'used as tie points for components at
or near filament potential. This type may be supplied with pins I, 4, and/or 6
omitted. Outline 15D, OUTLINES SECTION.
85
RCA Receiving Tube ManiJal
The high voltages at which the IB3·GT is operated are very dangerous. Great
care should be taken to prevent coming in contact with these high voltages. In
those circuits where the filament circuit is not grounded, the filament circuit operates at dc potentials which can cause fatal shock. Extreme precautions must be
taken when the filament voltage is measured. These precautions must include safeguards which definitely eliminate all hazards to personnel. The filament transformer,
whether it is of the iron-core or the air-core type, must be sufficiently insulated.
The voltages employed in some television receivers and other high-voltage
equipment may be sufficiently high to cause high-voltage rectifier tubes such as the
IB3-GT to produce soft X-rays which can constitute a health hazard unless the
tubes are adequately shielded. Relatively simple shielding should prove adequate,
but the need for this precaution should be considered.
SHARP-CUTOFF PENTODE
1B4P
Glass type used as rf amplifier or detector
In battery-operated receivers. Outline 24B, OUTLINES SECTION. Tube requires four-contaet
Bocket. For typical operating conditions and
maximum ratings as a class A1 amplifier, refer
to type 1E5-GP. Filament volts (de), 2.0; amperes, 0.06. Type 1B4-P is a DISCONTINUED
type listed for reference only.
TWIN DIODE-MEDIUM-MU TRIODE
PO~
~
,:01
Glass type used as combined detector, am·
plifier, and avc tube in battery-operated receivers. Maximum dimensions: over-aillength,
--! 10 Under DO cireumstances should the filament voltage be less than 1.06 volts or greater than 1.'6 volts.
PULSED RECTIFIER
For operation in a SIlS-liM, ,a-frame 81/stem
Maximum Ratings. CDBaiDll-Ma:r:imum ValuB8):
PEAx INvERsE PLATE VOLTAGIII" ................................... ..
PEAx PLATIII CUBBENT .............................................. .
AVEBAGmPLATIIICUBBEN'r ........................................... .
26000-ma:r;
60_
0.6_
volts
ma
ma
Characterlstlc:s, Instantaneous ValulII
Tube Voltage Drop for plate current of '1 ma...........................
226
volts
*The duration of the voltage pulse must not exceed 16 per cent of one horizontal scanning cycle. In a
62G-line, 30-frame BYBtem, 16 per cent of one horizontal scanning cycle is 10 microseconds.
- The dc component must Dot exceed 22000 volts.
at
==.
~
'
PENTAGRID CONVERTER
SG
Miniature type used in low-drain batteryG2 3
6
Operated receivers. Outline 'lB, OUTLINES
SECTION. Tube requires minlatare aeven-eon:::
tact 60cket and may be mounted In any poal2
~
tiOD. FJlament volta (dc), 1.4; amperes, 0.06.
P
TypIcal operation as converter: plate and gridI
No.2 volts, 90 (110 _ ) ; grids-No.8-and-No.5
,
supply volts, 110 ma:r;: grids-No.8-and-No.5
wlta,46 (66 _); grid-No.' volts, 0; grid-No.1
resistor, 0.2 megohm; plate resistance (approx.), 0.66 megohm; plate ma., 0.5; grids-No.3-and-No.6 ma.,
0.6; grid-No.2 ma., 1.2; grid-No.1 ma., 0.036; total cathode ma.. 2.86 (4 ma:r;); conversion transconductance, 800 jIDlhoa. This type Is used principally for renewal purposes.
4
NC
1L6
Ne
4
II
BS
POWER PENTODE
Glaaa lock-in type 1ISed in output stage of
battery-operated receivers. Outline 18A, OUTLINESSECTION. Tuberequireslocli:-insocket.
Filament volts (de), 1.4; amperes, 0.06. For
electrical. characterfstics and typical operation,
refertoglaas-octa\ type1A6-GT. Type1LA4 is a
DISCONTINUED typellsted for reference only.
lLA4
91
RCA Receiving Tube Manual
PENT AGRID CONVERTER
lLA6
Glass lock-in type used in battery-operated
receivers. Outline 13A, OUTLINES SECTION,
Tube requires lock-in socket. Filament volts
(dc), 1.4; amperes, 0.05. Typical operation as
converter is the same as for type 1A7-GT except that grid-No.2 voltsis 65 maz, totsl cathode
mao is 4.0 maz, plate resistance is 0.75 megohm,
and conversion transconductance for a grid-No.4
bias of -3 volts is 10 "mhos. This type is used
principally for renewal purposes.
POWER PENTODE
lLB4
Glass lock-in type used in output .tage of
battery-operated receivers. Outline 13A, OUTLINES SECTION. Tube requires lock-in lOcket.
Filament volts (dc), 1.4; amperes,O.05. For electrical characteristics, refer to pentode unit of
glass-octal type 1DS-GT. Type 1LB4 is used
principally for renewal purposes.
SHARP-CUTOFF PENTODE
lLCS
'Glass lock-in type used as rf or if amplifier
In battery-operatedreceivers. Outline 13A, OUTLINES SECTION. Tube requires lock-in socket.
Filament volts (dc), 1.4; amperes, 0.05. Typical
operation as class At amplifier: plate volts, 90
(110 max); grid-No.2 (screen-grid) volts, 45 ma.. ;
grid-No.1 volts, 0; plate resistance (approx.),
greater than 1 megohm: transconductance, 775
"mhos: plate ma., 1.16; grid-N 0.2 ma., 0.3. This
is a DISCONTINUED type listed for reference
only.
PENT AGRID CONVERTER
Glass lock-in type used in battery-operated
receivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Filament volts
(dc), 1.4; amperes, 0.05. Typical operation as
converter: plate volts, 90 (110 max): grids-No.Sand-No.5 volts, 36 (46 max); grid-No.2 volts, 45;
grid-No.1 volts, 0: plate resistance, 0.66 megohm: plate ma., 0.76; grids-No.3-and-No.6 ma.,
0.70: grid-No.2 ma., 1.4; totsl cathode ma., 2.9;
conversion transconductance (zero bias), 276 "mhos. This type is used principally for renewal purposes.
lLC6
DIODE-SHARP-CUTOFF PENTODE
lLOS
Glas.lock-in type used as combined detector and af voltage amplifier in battery-operated
receivers. Outline 18A, OUTLINES SECTION.
Tube requires lock-in socket. Filament volts
(dc), 1.4: amperes, 0.05. Characteristics of pentode unit: plate volts, 90 (110 maz): grid-No.2
volts, 45; grid-No.1 volts, 0; plate ma., 0.6:
grid-N 0.2 ma., 0.1: plate resistance, 0.76 megohm; transconductance, 575 "mhos. This is a
DISCONTINUED type listed for reference
only.
MEDIUM-MU TRIODE
lLE3
Glass lock-in type used as detector or voltage amplifier in battery-operated receivers. Outline 13A, OUTLINES SECTION. Tube requires
lock-in socket. Filament volts (dc) , 1.4; amperes,
0.05. Typical operation as class Al amplifier:
plate volts, 90 (110 max): grid volts, -3: plate
ma., 1.4; plate resistance, 19000 ohms; transconductance, 760 "mhos; amplification factor,
14.6. This type is used principally for renewal
purposes.
92
~
N~
sIC
NG 3
6
P 2
.
7 He:
I
F
8 '
BS
P
========= Technical Data =========
REMOTE-CUTOFF PENTODE
Lock-In type used· as rf or if amplifier in
battery-operated receivers. Outline 13A, OUTLINES SECTION. Tube requires lock-in socket.
Filament volts (de), 1.4; amperes, 0.05. Typical
operation as class A. amplifier: plate volts, 90
(110 max); grid-No.2 volts, 45 (110 .•,,,,,,,); gridNo.1 volts, 0; plate resistance (approx.), greater
than 1 megohm; transconductance, 800 ~mhoB;
plate rna., 1.7; grid-No:2·ma., 0.4. This type II
U88d principally for renewal purposes.
lLG5
DIODE-HIGH-MU TRIODE
'nlass lock-in type used as combined detector and amplifier in battery-operated receivers.
Outline 13A. OUTLINES SECTION. Tube requires lock-in socket. Filament volts (de), 1.4;
amperes, 0.06. For electricalchara.cteristics, refer to glass-octal type IH5GT. Type lLH4 i.
used principally for renewal purposes.
lLH4
SHARP-CUTOFF PENTODE
Glass lock-in type used as rf or if amplifier
in battery-operated receivers. Outline ISA, OUTLINES SECTION. Tube requires lock-in socket.
Filament volts (de), 1.4; amperes, 0.05. Typical
operation as class A. amplifier: plate and gridNo.2(screen-grid) volts, 90 (110 max); grid-No.1
volts, 0; plate ma., 1.6; grid-No.2 ma., 0.35;
plate resistance (approx.), 1.1 megohms; transconductance, 800 I'mhos. This type is used
principally for renewal purposes.
~
51C
lLN5
HALF-WAVE VACUUM RECTIFIER
Glass octal type used as highvoltage rectifier in television receivers.
r2
7 r,IS Maximum over-alllength,3-9/16 inches;
maximum seated length, 3 inches; maxIC I
s'c
imum diameter, 1-9/16 inches. Tube
requires octal socket and may be operated in any position. For installation and
application considerations, refer to type 1B3GT.
'IC 3
b NC
lN2A
FILAMENT VOLTAGE (AC) •••••••••••••••••••••••••••••••••••••••••••••
FILAMENT CURRENT ••••..•.•...•.•••••••••••••••••••••••••••••••••••
DmECT INTERELECTRODE CAPACITANCE:
Plate to Filament and Internal Shield .............................. .
1.25*
0.2
1.4
volts
ampere
pf
PULSED RECTIFIER
For operation in a 525-line, aO-frame system
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGEo-••••••••••••••••••••••••••••••••••••••
PEAK PLATE CURRENT •••.•••.••••••••••••••••••••••••••••••••••••.••
AVERAGE PLATE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28000 maz
50 max
0.6 max
volt.
ma
ma
Characteristics, Instantaneous Value.
Tube Voltage Drop for plate current of 7 ma .....•.••.........•.....•..
100
volts
* Under no circumstances should the filament voltage be less than 1. 05 volts or greater than 1.46 volts.
° The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 16 per cent of one horizontal scanning cycle is 10 microseconds.
• The de component must not exceed 24000 volts.
93
RCA Receiving Tube Manual
SHARP-CUTOFF PENTODE
lN5GT
Glass octal type used as rf or if amplifier in
battery-operated receivers. Outline 15A, OUT·
LINES SECTION. Tube requires octal socket.
Filament volts (de), 1.4; amperes, 0.05. Characteristics as class Al amplifier: plate and grid·
No.2 volts, 90 (110 max); grid-No.1 volts, 0;
plate resistance (approx.), 1.5 megohms; trans·
conductance, 750 pmbos; plate ma., 1.2; gridNo.2 ma., 0.3. This type is used principally for
renewal purposes.
DIODE-POWER PENTODE
~
G24
P
GISNG
3
2
--
7 G.I
r-
F+
I
Be
8
IS
NC
~
'+
'G!P
SGIP
Glass octal type used as eombined detector and power output tube in battery-operated
Po
receivers. Maximum over-all length, 4 inches; Pp 3
6
maximum diameter, 1-3/16 inehes. Filament
volts (de), 1.4; amperes, 0.05. Typical operation
2
7
of pentode unit as class Al amplifier: plate and
Fgrid-N 0.2 (screen-grid) volts, 90 (110 max);
I
8
C;;~p
grid-No.1 volts, --4.5; plate ma., 3.1; grid-No.2
NC
NC
mao (zero-signal), 0.6; plate resistance (approx.),
0.8 megohm; transconductance, 800 I'mhos; load resistance, 25000 ohms; output watts, 0.1. This
i •• DISCONTINUED type listed for reference only.
lN6G
REMOTE-CUTOFF PENTODE
lP5GT
Glass octal type used as rf or If amplifier in
battery-operated receivers. Outline 15A, OUT·
LINES SECTION. Tube reqnlresoetal socket.
Filament volts (de), 1.4; amperes, 0.05. Typical
operation as class Al amplifier: plate volts, 90
(110 max); grid-No.2 (sereen-grld) volts, 90 (110
max); grid-No.1 volts, 0; plate resistance
(approx.), 0.8 megohm; transeonduetance, 750
I'mhos; plate ma., 2.8; grid-No.2 ma., 0.7. This
is a DISCONTINUED type listed for reference
only.
BEAM POWER TUBE
lQ5GT
Glass octal type used in the output stage
of battery-operated receivers. Outline 14C,OUT·
LINES SECTION. Tube requires octal socket.
Filament volts (de), 1.4; amperes, 0.1. For electrical characteristics and ratings, refer to type
8Q5-GT with parallel filament arrangement.
Type 1Q5-GT is a DISCONTINUED type for
reference only.
..~
~",~
..
F+ 2
7
I
NC
8
r.
C;;"
NCO
PENTAGRID CONVERTER
Miniature type used in lightweight, portable, compact, battery-operated receivers. Outline 7B, OUTLINES SECTION. Tube requires
miniature seven-contact socket. Characteristics
as converter with separate excitation: plate volts,
67.5 (90 max); grids-No.2 and No.4 volts, 67.5
max; grid-No.3 volts, 0; rms grid-No.1 volts,
25; grid-No.1 resistor, 0.1 megohm; plate resistance (approx.), 0.4 megohm; conversion
transconductance, 280 I'rnhos; plate rna., 1.4; grids-No.2 and No.4 ma., 8.5; grid-No.1 1'8,250; total
cathode ma., 5.2. This type is used principally for renewal purposes.
1R5
94
========= Technical Data ========POWER PENTODE
Miniature type used in output stage of
lightweight, compaet, portable, battery-operated equipment. Types 1S4 and 8S4 are identical except for filament arrangement. Outline 7B,
OUTLINES SECTION. Type 1S4 requires
miniature seven-contact socket and may be
mounted in any position. For ratings and typical operation, refer to type 3S4 with parallel
tIlament arrangement. Filament volts (dc), 1.4;
amperes, 0.1. This type is ueed principally for
renewal purpoees.
154
DIODESHARP·CUTOFF PENTODE
Miniature type used in lightweight, por-
table, compact, battery-operated. receivers as
combined detector and af voltage amplifier. Outline 7B, OUTLINES SECTION. Tube requires
miniature seven-contact socket. Filament volts
(dc), 1.4; amperes, 0.05. For electrical characteristics, refer to type 1U5. Type 1S5 is used
principally for renewal purposes.
155
REMOTE·CUTOFF PENTODE
Miniature type used in lightweight, portable, compaet, battery-operated receivers as
rf or if amplifier. Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contaet
socket. Filament volts (dc), 1.4; amperes, 0.05.
Characteristics as class Al amplifier: plate and
grid-No.2 volts, 67.5 (90 mao;); grid-No.1 volts,
0; plate resistance (approx.), 0.25 megohm;
transconductance, 875 ,.mhos; plate ma., 3.4;
grid-No.2 ma., 1.5. This type is ueed principally for renewal purposes.
G24
~G'
F~~
1T4
BEAM POWER TUBE
Glass octal type used in output stage of
battery-operated receivers. Outline 14C, OUTLINES SECTION. Tube requires octal socket.
Filament volts (de), 1.4; amperes, 0.05. Typical
:
:::
1 Foperation as class Al amplifier: plate and gridG3
No.2 volts, 90 (110 mao;) ; grid-No.1 volts, -6;
I
8
peak af grid-No.1 volts, 6; plate ma., 6.5; gridNC
NC
No.2 mao (zero-signal), 0.8; grid-No.2 mao
(maximum signal), 1.5; plate resistance, 0.25
megohm; transconductance, 1150 ,.mhos; load resistance, 14000 ohms; total harmonic distortion, 7.11
per cent; output watts, 0.17. This is a DISCONTINUED type listed for reference only.
,.
115GT
DIODE-SHARP·CUTOFF PENTODE
Subminiature type used as combined detector and audio amplifier in small, compact,
battery-operated receivers for the standard AM
broadcast band. Maximum dimensions: over-all
length, 1~75 inches; seated height, 1.5 inches;
diameter, 0.4 inch. Tube requires subminiature
eight-contact socket. Filament volts (de), 1.25;
amperes, 0.04. Filament voltage should never
exceed 1.6 volts. Typical operation of pentode
unit as class Al amplifier: plate and grid-No.2 volts, 67.5 mao;; grid-No.1 volts, 0; plate resistance (approx.), 0.4 megohm; transconductance, 600 pmhos; plate ma., 1.6; grid-No.2 rna., 0.4; total cathode mao
2.0 mao;. Maximum diode plate ma., 0.25. This is a DISCONTINUED type listed for reference only:
1T6
95
RCA Receiving Tube Manual
SHARP-CUTOFF PENTODE
He
Miniature type used as rf or if amplifier in
.tages not controlled by avc in lightweight,
compact, portable, battery-operated equipment.
Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contact Bocket. Filament volt. (dc) , 1.4; amperes, 0.06. Characteristics as class A. amplifier: plate and grid-N o.
2 volts, 90 (120 max); grid-No.1 volts, 0; plate
resistance (approx.), 1 megohm; transconductance, 900 .umhos; plate rna., 1.6; grid-No.2 rna., 0.5. This type is used principally for renewal purposes.
1U4
DIODE-SHARP-CUTOFF
PENTODE
Miniature type used in lightweight, comportable, battery-operated receivers as
combined detector and af voltage amplifier.
Outline 7B, OUTLINES SECTION. Tube reQuires miniature seven..contact socket. Filament
volts (dc), 1.4; amperes, 0.06. Characteristics of
pentode unit as class A. amplifier: plate and
grid-No.2 volts, 67.6 (100 max); grid-No.1 volts,
0; plate resistance (approx.), 0.6 megohm;
transconductance, 625 "mhos; plate ma., 1.6; grid-No.2 ma., 0.4. Maximum diode plate ma., 0.28 max.
This type is used principally for renewal purposes.
lU5
pact~
HALF-WAVE VACUUM RECTIFIER
lv
Glass type used in ac/dc or automobile
receivers. Maximum dimensions: over-all length,
4-3/16 inches; seated height, 3-9/16 inches; diameter, 1-9/16 inches. Tube requires four-con ..
tact socket. Heater volts (ac /dc), 6.3; amperes, 0.3. Maximum ratings as half-wave rectifier: peak inverse plate volts, 1000; peak plate
ma., 270; peak heater-cathode volts, 500; dc
output ma., 45. This type is used principally
for renewal purposes.
HALF-WAVE VACUUM RECTIFIER
Miniature type used in high-voltage, low-current applications such as
the rectifier in high-voltage, pulse-operated voltage-doubling power supplies
p
P
for kinescopes. The very low power
required by the filament permits the use of a rectifier transformer having small
size and light weight.
lV2
FILAMENT VOLTAGE (AC) •••••••••••••••••••••••
FILAMENT CURRENT ••••••..•••••••••••••••••••••••••••••••••••••••••••
DIRECT INTERELECTRODE CAPACITANCE:
0
...................... .
0.6250.3
volt
ampere
pf
0.8
Plate to Filament (Appro:..) ••••.•.•.....••••••••••••••••.•••••.•••.•
-Under no circumstances should the filament voltage be less than 0.626 volt or greater than 0.725 volt.
PULSED RECTIFIER
For operation in a 5ll5-iine, SO-frame Iyotem
Maximum Ratings, (Design-Maximum Values):
8250-ma",
volt.
11 max
ma
0.6 max
ma
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In
a 525-line 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds •
• The dc component must not exceed 7000 volts.
PEAK INVERSE PLATE VOLTAGE* ••..•••••••••••••••••••••••••••••••••••
PEAK PLATE CURRENT •••••••••••••••••••••••••••••••••••••••••••.•••••
AVERAGE PLATE CURRENT .•••••••••••••••••••••.•••••••••••••••••••••••
96
Technical Data
INSTALLATION AND APPLICATION
Type 1V2 requires a miniature nine-contact socket and may be mounted in any
position. The socket should be made of material having low leakage and should
have adequate insulation between its filament and plate terminals to withstand
the maximum peak inverse plate voltage. To provide the required insulation in
miniature nine-contact sockets designed with a cylindrical center shield, itis necessary
to remove the center shield. In addition, socket terminals 2, 3, 7, and 8 shall not
be used. Socket terminal 6 may be used as a tie point for components at or near
filament potential. Outline 8D, OUTLINES SECTION.
The filament is of the coated type and is designed for operation at 0.625 volt.
The filament windings on the pulse transformer should be adjusted to provide the
rated voltage under average line-voltage conditions. When the filament voltage is
measured, it is recommended that an rms voltmeter of the thermal type be used.
The meter and its leads must be insulated to withstand 15000 volts and the stray
capacitances to ground should be minimized.
The high voltages at which the 1 V2 is operated are very dangerous. Great care
should be taken to prevent coming in contact with these high voltages. Particular
care against fatal shock should be taken in measuring the filament voltage in those
circuits where the filament is not grounded. Precautions must include safeguards
which definitely eliminate all hazards to personnel.
HALF-WAVE VACUUM RECTIFIER
Miniature types used in high-voltage, low-current applications such as
the rectifier in a high-voltage, rf -operated powersupply, or as the rectifier of
IS
IS
high-voltage pulses produced in television scanning systems. Outline 9A, OUTLINES SECTION. Tubes require miniature nine-contact socket and may be mounted in any position. Socket terminals
3 and 7 may be used as tie points for components at or near filament potential. For
high-voltage considerations, refer to type 1B3-GT. Type 1X2-A is used principally
for renewal purposes.
lX2A
lX2.B
F
FILAMENT VOLTAGE (AC). • • • . •.. .. ...• ••.. •. .•. •.. . .. •. .• .•• . •.••••.•••
1.25·
volt.
FILAMENT CURRENT...................................................
0.2
ampere
DIRECT INTERELECTRODE CAPACITANCE:
PlatetoFilamentandInternaIShield(Approx.).. ..................•.••
1.0
pi
• Under no circumstances should the filament voltage be less tban 1.05 volts or greater than 1.45 volts.
PULSED RECTIFIER
For operation in a 5:e5-line, SO-frame Bllotem
lX:e-A
lX!-B
Design-Center De8ign-Maximum
Values
Value8#
PEAK INVERSE PLATE VOLTAGE- ........................ ..
20000tma.,
22000 ma" volts
45ma.,
45 rna.,
rna
PEAK PLATE CURRENT .................................. .
0.0 rna.,
ma
AVERAGE PLATE CURRENT .............................. ..
0.5ma..
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 7 rna...........................
100
volts
t AbsoluteMaximum. Under no circumstances should this absolute value be exceeded.
# Except as noted.
- The de component must not exceed 16000 volts for lX2-A, 18000 volts for lX2-B.
Maximum Ratings:
~G'
$
~
r.
POWER TRIODE
Glass type used in output stage of radio receivers and amplifiers. Outline 28, OUTLINES
SECTION. Tube requires four-contact socket.
Filament volts (ac Ide), 2.5; amperes, 2.5. Typical operation as class Al amplifier: plate volts,
250 (300 max); grid volts, -45; plate ma., 60;
amplification factor, 4.2; load resistance, 800
ohms; transconductance, 5250 .umho!; plate dissipation, 15 max watts; load resistance, 2600
2A3
97
RCA Receiving Tube Manual
ohms; power output, 3.5 watts. Typical operation as push-pull class AB, amplifier (values are for two
t~be&): plate supply volts, 300; cathode-bias resistor, 780 ohms; peak af grid-to-grid volts, 156; zeros,gnal plate ma., 80; maximum-signal plate rna., 100; effective load resistance (plate-to-plate), 5000
ohms; power output, 10 watts. This type is used principally for renewal purposes.
POWER PENTODE
2A5
Glass type used in output stage of ac-operated receivers. Outline 27, OUTLINES SECTION. Tube requires six-contact socket. Except
for its heater rating (2.5 volts ac/dc; 1.75
amperes), the 2A5 has electrical characteristics
identical with type 6F6. Type 2A5 is a DISCONTINUED type listed for reference only.
Wt.
G~
4G,
P 2
~
:::
I
•
H
TWIN DIODE-HIGH-MU TRIODE
2A6
Glasa type used in ac-operated receivers
chiefly as a combined detector, amplifier, and
avc tube. Outline 24B, OUTLINES SECTION.
Tube requires I!ix-contact socket. Except for its
heater rating (2.5 volts ac/dc; 0.8 ampere),
and within its 250-volt maximum plate rating,
the 2A6 has electrical characteristics identical
with type 6SQ7. Type 2A6 is a DISCONTINUED type listed for reference only.
2
H
~.
3
4
POI
GT
2
~
---
.
Ii
PT
I
6
.H
H
PENTA GRID CONVERTER
2A7
2AF4A
Glass type used in ac-operated receivero.
Outline 24B, OUTLINES SECTION. Tube requires Bmallseven-contact (0.75-inch, pin-circle
diameter) socket. Except for its heater rating
(2.5 volta ac/dc; 0.8 ampere) and its interelectrode capacitances, the 2A 7 has electrical characteriBtics identical with type 6A8. Complete
ohielding of this tube is generally necessary.
Type 2A7 is a DISCONTINUED type listed
for reference only.
..
MEDIUM-MU TRIODE
H 3
~K
6
Miniature types used as local os•
cillator in uhf television receivers emG 2
7
ploying
series-connected
heater
strings.
Related types:
OUTLINES
SECTION.
pi
Outline
7A,
3AF4A,6AF4A
Heater volts (ac/dc), 2.35; amperes,
0.6; warm-up time (average), 11 seconds. Type 2AF4-B only, maximum rating
(design maximum), peak heater-cathode volts, 180 max. When the heater is positive with respect to the cathode, the de component of the heater-cathode voltage
must not exceed 100 volts. Typical operation of 2AF4-B as oscillator at 1000 Me:
plate rna., 17.5; grid I'a (approx.), 700. Except for heater ratings noted, these
types are identical with miniature type 6AF4-A. Type 2AF4-A is a DISCONTINUED type listed for reference only.
2AF4B
HALF-WAVE VACUUM RECTIFIER
5
LC 4
Duodecar type used to supply
high voltage to the anode of picture
tubes in television receivers. Outline
16A,OUTLINESSECTION. Tubere.
I<,JS,H
II
quires 12-contact socket and may be
mounted in any position. Socket terminals 2,3, 5, 6, 7, 8, 9, and 11 should not be
used as tie points; terminals 4 and 10 may be used as tie points for components at
or near cathode potential. For high-voltage and X-ray safety considerations, refer
to type 1B3-GT. Heater volts (ac/dc), 2.5; amperes, 0.3.
2AH2
98
\
========= Technical Data ========--PULSED RECTIFIER
Fo, ope,ation in a 5115-line, 80-frmn. SI/stem
Maximum Ralings, (D",ign-Maximum Values):
PEAK INVERSE PLATE VOLTAGE- ••••.•••••••••••••••••••••••••••••••• ".
PEAK PLATE CURRENT .••••••••••••••••••••••••••••••••••••••••••••••
AVERAGE PLATE CURRENT ••••••••••••••••••••••••••••••••••••••••••• 4
80000 omtu:
80 max
1.6_
volts
ma
ma
Characteristics, I'nstantaneaus Value:
Tube Voltage Drop for plate current of 7 ma...........................
100
volts
-The duration of the voltage pulse must not exceed 16 per cent of one horizontal scanning cycle. In a
625-line, 30-frame system, 15 per cent of one borizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 24000 volts.
a lC
H,KHALF-WAVE VACUUM RECTIFIER
9 IS
Duodecar type used to supply
high voltage to the anode of picture
tubes in tslevision receivers. Outline
16B, OUTLINES SECTION. Tube
H,K,IS
H
requires duodecar twelve-contact
socket and may be mounted in any position. Socket terminals 4, 7, and 10 may be
used as tie points for components at or near heater potential. For high-voltage and
X-ray safety considerations, refer to type 1B3-GT. Heater volts (ac/dc), 2.5;
amperes, 0.33.
2AS2
PULSED RECTIFIER
Fo, ope,ation in a U5-line, SO-f,ame "1/8/em
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
PEAK PLATE CURRENT ••••.•••••••••••••••••••••••••••••••••••••••••.•
AVERAGE PLATE CURRENT •••••..••.•••••••••••••••••••••••••••••••• _
80000·max
80 max
1.6mtu:
volts
ma
ma
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 7 ma. . . . . . . . . . •• . • . . . • . . • • • . • • •
100
volts
D The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 24000 volts.
TWIN DIODEREMOTE-CUTOFF PENTODE
Glass type used as combined detector, ave
tube, and amplifier. Outline 24B, OUTLINES
SECTION. Tube requires small seven-contact
(0.75-inch, pin-circle diameter) socket. EXcept
for its heater rating (2.5 voltsac Idc; 0.8 ampere)
and its interelectrode capacitances, the 2B7
2B7
has electrical characteristics identical with type
6BS-G. Type 2B7 is a DISCONTINUED type
listed for reference only.
MEDIUM-MU TRIODE
Miniature types used as rf amplifier in vhf
television tuners employing series-connected
heater strings. Outline 7B, OUTLINES SECTION. Heater volts (ac Idc), !BN 4:2.3, ftBN 4-A:
2.35: amperes, 0.6; warm-up time (average), 11
seconds. Except for heater rating, these types
are identical with miniature types 6BN4 and
6BN4A, respectively. Type 2BN4 is a DISCONTINUED type listed for reference only.
Type 2BN 4-A i. used principally for renewal
purposes.
2BN4
2BN4A
Related type.:
3BN4A.6BN4A
99
RCA Receiving Tube Manual
HIGH-MU TRIODE
Nuvistor type used as a groundedcathode, neutralized rf amplifier in vhf
tuners of television and FM receivers
employing series-connected heater
strings. Outline 1, OUTLINES SECR_laled Iype.:
TION. Heater volts (ac/dc), 2.1; am6CW4,13CW4
peres, 0.45; warm-up time (average), 8
seconds. Except for heater ratings, this
type is identical with nuvistor type 6CW4.
2CW4
~"
SHARP-CUTOFF TETRODE
,
3 .
Miniature type used as rf amplifier
e CIa
in vhf tuners of television receivers
." :::
employing series-connected heater ~ 2 I '
7 11
Relaled Iypes:
strings. Outline 7B, OUTLINES SEC3CY5, 4CY5, 6CY5
TION. Heater volts (ac/d~, 2.4; am01
peres, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this type
is identical with miniature type 6CY5.
2CY5
HIGH-MU TRIODE
2054
aelaled type:
6DS4
Nuvistor type used as groundedcathode, neutralized rf amplifier in vhf
tuners of television and FM receivers
employing series-connected heater
strings. Because of its cutoff characteristics, the 2DS4 is used in circuits
MEDIUM-MU TRIODE
20V4
aelaled type:
6DV4
Nuvistor type used at frequencies
up to 1000 megacycles in uhf oscillator
stages of television receivers employing series-connected heater strings.
Outline 1, OUTLINES SECTION.
Heater volts (acjdc), 2.1; amperes,
0.45; warm-up time (average), 8 seconds .. E~cept. for h~ater ra~ings, this
type IS IdentIcal WIth nUVlstor type
6DV4.
MEDIUM-MU TRIODE
:
$.9. ~.~
(s_
((K~12
10
---'
I\.~
.
~
~l)'
~a·
4
~
INDEX'L~RGE LUG
.-SHORT PIN; Ie-DO NOTUSI
.
K
" .4___H
5. 6
(J
Miniature type used as a localoscillator tube in uhf television re.
7 P
ceivers covering the frequency range G 2
aelaled types:
3DZ4,6DZ4
from 470 to 890 megacycles and em.
I
ploying series-connected heater strings.
p
Outline 7A, OUTLINES SECTION. Heater volts (acjdc), 2.35; amperes, 0.6;
warm-up time (average), 11 seconds. Peak heater-cathode volts, 180 max (the dc
component must not exceed 100 volts when' heater is positive with respect to cathode).
Except for heater and heater-cathode ratings, this type is identical with miniature
type 6DZ4.
20Z4
100
========= Technical Data =========
ELECTRON-RA Y TUBE
PT~~-~
Glas. type with triode unit used to indicate visually by means of a fiuorescent target the ellects
__ TA 5 K
of a change in a controlling voltage. It i. nsed
as a convenient means of indicating accurate raRC
dio receiver tuning. Maximum dimensions:overI,laled Iypel
all length, 4-3/16 inche.; seated height, 8-9/16
,
&
6E5
inches:diameter,1-9/16 inches. TuberequirellixH
H
contact socket. Except for it. heater rating (2.5
volts ac/dc; 0.8 ampere), the 2E5 ha. electrical
characteristics identical with type 6E5. Type 2E6 i. a DISCONTINUED typeUltedforreferenc,only.
H4
2ES
TWIN DIODE
~
5K
Miniature type used •• a horizontal phaoe
H
6 ~
detector in television receivers. Outline 7B,
OUTLINES SECTION. Tube require. miniatUre seven-contact !!locket and may be mounted
in any position. Heater volt. (ac/dc), 2.1; amperes, 0.45; warm-up time (averag-e), l1leconds.
Maximum ratings (de8ign maximum) a. halfNC
wave rectifier: de output mao per plate, 6 max;
peak heater-cathode volts, 200 max. When the
heater is positive with respect to cathode, the de component of the heater-cathode voltage mult not
exceed 100 volts. Type 2EN5 is used principally for renewal purpo ••••
",:. .
2EN5
'
(l
sF>
H4
H 3
G 2
6 ~IS
---
7K
,
K
*
SHARP-CUTOFF TRIODE
Miniature type with frame grid
used in vhf tuners of television receivers. Outline 7B, OUTLINES
SECTION. Heater volts (ac/dc), 2.3;
amperes, 0.6. Except for heater ratings, this type is identical with miniature type 6ER5.
2ER5
Related type••
3ER5,6ER5
SHARP-CUTOFF TRIODE
Miniaturetypeusedasanrfamplifier in vhf tuners of television receivers
Relaled Iype••
G 2
7
employing series-connected heater
3FH5,6FH5
strings. Outline 7B, OUTLINES SECK'
TION.Heatervolts (ac/dc),2.35;amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6FH5.
H4
5"
H
'S
3
H4
2FH5
6
~
sP
BEAM HEXODE
Miniature type used as rf-amplifier tube in vhf television receivers
:2 2
7 G~
employing series-connected heater
Relaled type.
6FS5
G4
G4
strings. Outline 7B, OUTLINES SECGI'
TION. Heater volts (ac/dc), 2.4; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6FS5.
H
3
___
6
H~~.
G3
sP'ol5
2FS5
HIGH-MU TRIODE
2GK5
Miniature type with frame grid
used as grounded-cathode rf-amplifier
lelat... ly .....
G 2
71<
tube in vhf tuners of television re3GK5,6GK5
ceivers employing series-connected
heater strings. Outline 7B, OUTLINES
SECTION. Heater volts (ac/dc), 2.3; amperes, 0.6; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with miniature type 6GK5.
,
101
RCA Receiving Tube Manual
HALF-WAVE VACUUM RECTIFIER
H
Miniature type used as rectifier of high-voltage pulses produced in scanning systems of color...
LC
television receivers. Outline 9A, OUTLINES
SECTION. Tube requires miniature 9-contact
locket and may be mounted in any position.
Socket terminals 3 and 7 may be connected to
the heater. Heater volts (ac), 8.16; amperes,
H,K
H,K
0.22. Maximum ratings as pulsed rectifier in 626IS
IS
line, 30-frame system: peak inverse plate volts,
18000 max; peak plate ma., 80 max; average plate rna., 1.5 max. For high-voltage considerations, see
type lBS-GT. Type SA2 i. used principally for renewal purposes.
3A2
HALF-WAVE VACUUM RECTIFIER
~5
LC
LC
Glass octal type used as rectifier
3
of high-voltage pulses produced in the
scanning systems of color television
H 2
7 ~SK
receivers. Outline 15D, OUTLINES
I
8
SECTION. Tube requires octal socket
LC
LC
and may be mounted in any position. Socket terminals 1, 3 4, 5, 6, and 8 may be
connected to socket terminal 7. Socket terminals 4 and 6 may be used as tie points
for components at or near heater potential. For high-voltage considerations, see
type 1B3-GT.
3A3
HEATER VOLTAGE (AC). ••.•• ..• .•••••••. .• ....................... •.•
8.15*
volts
HEATER CURRENT.. ...............................................
0.22
ampere
DIRECT INTERIllLECrnODE CAPACITANCE (Approx.):
Plate to Heater, Cathode, and Internal Shield. . . • . . . . . . . . . . . . . . . . .
1. 5
pf
• Under no circumstances should the heater voltage be less than 2.65 volts or greater than 3.66 volts.
PULSED RECTIFIER
a 5Z5-line, 90·jrame 811'stem
Maximum Rallngs, (Vesign-Maximum Values):
PEAK INVERSE PLATE VOLTAGE"....................................
80000 maoo
volts
PEAK PLATE CURRENT. . . . . . .. . . .. . .. .. .. . . . . . . . .. . . . . . . . . . . . .. . . ..
88 max
ma
AVERAGE PLATE CURRENT. . .. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
1. 7 max
ma
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
62o-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
For operation in
DIODE-TRIODE-PENTODE
Glass octal type used as combined detector,
af amplifier, and rf amplifier In battery-operated
receivers. Maximum over-all length, 8-7/16
Inches; maximum diameter, 1-6/16 inches. Filament volts, 1.4 (parallel), 2.8 (series); amperes,
0.1 (parallel), 0.05 (series). Typical operation aB
cias.A,amplifier:triodeunit-platevolts,90(110
max); grid volts, 0; amplification factor, 65;
plate resistance, 0.2 megohm; transconductance,
IS
826 "mhos; plate ma., 0.2; pentode unit-plate and grid-No.2 volts, 90 (110.max); grid-No.1 vol.ts~ 0;
plate resistance, 0.8 megohm; transconductance, 750 pmhosjplate ma., 1.5; Kfld-No.2 ma., 0.5. ThlllS a
DISCONTINUED type Ii.ted for reference only.
3A8GT
MEDIUM-MU TRIODE
4
~
SK
" 3
6 G
Miniature type used as local oscillator in uhf television receivers covG 2
7 P
ering the frequency range of 470 to 890
Related types:
2AF4B, 6AF4A
megacycles per second and employing
pi
series-connected heater strings. Outline 7A OUTLINES SECTION. Heater volts (acjdc), 3.15; amperes, 0.45; warmup tim~ (average), 11 seconds. Except for heater ratings, this type is identical with
miniature type 6AF4-A.
3AF4A
102
========= Technical Data =========
~
H4
sKoa
TWIN DIODE
Miniature type having high-perveance used as detector in television
2
7
receivers employing series-connected
Relat... types.
Po2
PO! heaterstrings.Outline7A,OUTLINES
6AL5,12AL5
K "
SECTION. Heater volts (ac/dc), 3.15;
amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6AL5.
H 3
6 ..
3AL5
HALF-WAVE
VACUUM RECTIFIER
3AT2
Duodecar type used to supply
NO high voltage to the anode of picture
II
tubes in television receivers. Outline
12
NO 16B, OUTLINES SECTION. Tube
H
requires duodecar twelve-contact
socket and may be mounted in any position. For high-voltage and X-ray safety
considerations, refer to type 1B3-GT. Heater volts (ac/dc), 3.15; amperes, 0.22.
10
PULSED RECTIFIER
FM' OJIMalion in a 6S6-line, SO-frame
Maximum Ratings, (Deaign-Mao:imum Values):
81/."'"
PEAK INVERSE PLATIlI VOLTAGIlI" .....................................~
80000 mao:
volta
PEAK PLATE CURRENT...............................................
88 m"",
ma
AVERAGIlI PLATIlI CURRENT........... .. ................ . ..............
1.7 m"",
ma
• The duration of the voltage puIse must not exceed 15 per cent of one horizontal scanning cycle. In a
626-line, SO-frame system, 16 per cent of one horizontal scanning cycle is 10 microseconds.
$
H4
:-
SHARP-CUTOFF PENTODE
Miniatu!'e type used as rf amplifier in television receivers employing
(;3 2
7 K;
series-connected heater strings. OutRelat.d type..
IS
,
I
line 7B, OUTLINES SECTION.
4AU6,6AU6A, 12AU6
G,
Heater volts (ac/dc), 3.15; amperes,
0.6; warm-up time (average), 11 seconds. Peak heater-cathode volts, 200 max. When
the heater is positive with respect to the cathode, the dc component of the heatercathode voltage must not exceed 100 volts. Except for heater and heater-cathode
ratings, this type is identical with miniature type 6AU6.
11
•
3
6
Oil
3AU6
TWIN DIODE-HIGH-MU TRIODE
Miniature type used as combined
detector, amplifier, and avc tube in
television receivers employing seriesRelat.d typ ••
connected heater strings. Outline 7B,
4AV6, 6AV6, 12AV6
OUTLINES SECTION. Heater volts
(ac/dc), 3.15; amperes, 0.6; warm-up time (average), 11 seconds. Peak heatercathode volts, 200 max. When the heater is positive with respect to the cathode, the
dc component of the heater-cathode voltage must not exceed 100 volts. Except for
heater and heater-cathode ratings, this type is identical with miniature type 6AV6.
3AV 6
103
RCA Receiving Tube Manual
HALF-WAVE VACUUM RECTIFIER
3AW3
Glass octal type used as rectifier
of high-voltage pulses produced in the
scanning system of television receivers.
Outline 15B, OUTLINES SECTION.
Tube requires octal socket and may be
mounted in any position. Heater volts
(ac/dc), 3.15; amperes, 0.22.
@
5 lC
LC 3
'ti
2
7
.
I
rsK
6
L.C
LC
PULSED RECTIFIER
For operation in a 5i1l5-line, 30~frame syslem
Maximum Ratings, (Design-Maximum Values):
30000 max
volts
88 max
ma
1. 7 max
ma
The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
626-line, SO-frame system, 16 per cent of one horizontal scanning cycle is 10 microseconds.
PEAK INVERSE PLATE VOLTAGE* . . . . . . . . . . . . . . . . . . . . . . . . . " . . . . . . . . . . .
PEAK PLATE CURRENT •••••••••••.•••••••••••••••••••••.•••••••••••.•
AVERAGE PLATE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
*
HALF-WAVE VACUUM RECTIFIER
~
LC
p
LC
Glass octal type used as rectifier of high4
5
voltage pulses produced in the scanning systems
L<::' 3
6 LC
of television receivers. Outline 25B, OUTLINES
SECTION. Tube requires octal socket and may
be mounted in any position. Low-potential cir2
7 HK
cuits should not be connected to any of the socket
H
IS
terminals. Any or all of the following socketI
8
terminal connections are permissible and may
LC
LC
aid in corona reduction: socket terminalS 1~ 3,
5 J and 7 may be connected together; socket terminals 2, 6, and 8 may be connected together; socket
terminal 4 may be connected to socket terminals 2 or 7, or may be used as a tie point for a heatervoltage dropping resistor. Heater volts (ac/de), 3.15; amperes, 0.22. Maximum ratings as pulsed rectifier in 525-line, 30-frame system: peak inverse plate volts (absolute maximum), S5000 max (dc 25000
max); peak plate rna., 80 max; average plate rna., 1.1 max. For high-voltage considerations, see type
1BS-GT. Type SB2 is used principally for renewal purposes.
382
REMOTE-CUTOFF PENTODE
:
:
~
H
Gz
3
b
Miniature type used as rf amplifier in standard broadcast and FM re2
7
ceivers, as well as in wide-band, highRelated types:
G3
"
IS
6BA6,12BA6
frequency applications; for use in equipI
ment employing series-connected
Go
heater strings. Outline 7B, OUTLINES SECTION. Heater volts (ac/dc), 3.15;
amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6BA6.
38A6
SHARP-CUTOFF PENTODE
. ~4
5 p
Miniature type used as rf or if amH 3
6 G2
plifier in television receivers employing K
--K
Related types:
series-connected heater strings. Out- v3 2
7 G3
4BC5,6BC5
line 7B, OUTLINES SECTION. IS
.
IS
Heater volts (ac/dc), 3.15; amperes,
vi I
0.6; warm-up time (average), 11 seconds. Peak heater-cathode volts, 200 max. When
the heater is positive with respect to the cathode, the dc component of the heatercathode voltage must not exceed 100 volts. Except for heater and heater-cathode
ratings, this type is identical with miniature type 6BC5.
38 C5
104
========= Technical Data =========-
~
4
5P
H 3
PENT AGRID CONVERTER
___
6 (;2
===
G4
Miniature type used as converter
in superheterodyne circuits in both the
K 2
7 (;3
Related type ..:
standard broadcast and FM bands in
Co, ,
6BE6,12BE6
equipment employing series-connected
(;,
heater strings.Outline 7B, OUTLINES
SECTION. Heater volts (ac/dc), 3.15; amperes, 0.6; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with miniature type 6BE6.
H4
~
H
3BE6
MEDIUM-MU TRIODE
sP
K
3BN4
Miniature types used as rf amplifier in grid-drive circuits of vhf teleG2
vision tuners. The double base-pin
Related types:
7G
2BN4A, 6BN4A
,
connections for both cathode and grid
K
reduce effective lead inductance and
lead resistance with consequent reduction in input conductance. In addition, the
basing arrangement facilitates isolation of input and output circuits and permits
short, direct connections to base-pin terminals. Outline 7B,OUTLINES SECTION.
Heater volts (ac/dc), 3; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, the 3BN4 and 3BN4-A are identical with miniature types
6BN4 and 6BN4-A, respectively. Type 3BN4 is a DISCONTINUED type listed
for reference only.
3
___
6
3BN4A
~
4
BEAM TUBE
,(;2
H 3
6
G3
Miniature type used as combined
limiter, discriminator, and af voltage
GI 2
7 P
amplifier in intercarrier television and
Related typell
,
FM receivers employing series-con4BN6,6BN6
~
nected heater strings. Outline 7C,
OUTLINES SECTION. Heater volts (ac/dc), 3.15; amperes, 0.6; warm-up time
(average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6BN6.
3BN6
SHARP-CUTOFF TWIN PENTODE
Miniature type used as combined
sync separator, sync clipper, and age
amplifier tube in television receivers
Related typesl
employing series-connected heater
4BU8,6BU8
K
(;3P,
strings. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 3.15: amperes, 0.6: warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6BUS.
3BU8
4
~
5 P
(;!'
PENTAGRID AMPLIFIER
Miniature type used as gated am===
plifier in television receivers employing
K 2
7 (;3
series-connected heater strings. OutRelated type:
6BY6
Gl\
,
line 7B, OUTLINES SECTION.
6,
Heater volts (ac/dc), 3.15; amperes,
0.6: warm-up time (average), 11 seconds. Except for heater ratings, this type is
iaentical with miniature type 6BY6.
H 3
:::
6
3BY6
105
RCA Receiving Tube Manual
SEMIREMOTE.CUTOFF PENTODE
~4
5 p
Miniature type used in gain-conH 3
___
6 Ga
trolled video if stages of television reII 2
7 G)
ceivers employing series-connected
Related Iypel.
heater strings. Outline7B, OUTLINES
I
la
48%6, 6816, 12816
SECTION. Heater volts (ac/dc), 3.15;
GI
amperes, 0.6; warm-up time (average), 11 seconds. Peak heater-cathode volts when
heater is negative with respect to cathode, 300 max (the de component must not
exceed 200 volts). Except for heater and heater-cathode ratings, this type is
identical with miniature type 6BZ6.
3BZ6
SHARP.CUTOFF PENTODE
~M
it'
4
5
Miniature type used as rf or if am- H 3
___
6 Ga,
plifier in television receivers employing
"2
7 G)
series-connected heater strings. OutRelated Iypel.
4CB6, 6CB6, 6CB6A
line 7B, OUTLINES SECTION. .
I
.a.
Heater volts (ac/dc), 3.15; amperes,
GI
0.6; warm-up time (average), 11 seconds. Peak heater-cathode volts: heater negative
with respect to cathode, 300 max; heater positive with respect to cathode, 200 max
(the de component must. not exceed 100 volts). EXcept for heater and heatercathode ratings, this type is identical with miniature types 6CB6 and 6CB6-A.
3CB6
SHARP.CUTOFF PENTODE
~5
p
Miniature type used as rf and if
" 3
b Ga
amplifier in vhf television receivers employingseries-connected heater strings. S32
-_. 7 S3
.elatedlyp.
6CE5
Outline 7B, OUTLINES SECTION.
IS
IS
Heater volts, 3.15; amperes, 0.6; heater
Gil
warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6CE5.
3CES
SHARP.CUTOFF PENTODE
~'H
4
5 P'
Miniature type used as rf or if am'H 3
:::
6 Ga
plifier in television receivers employing
"2
7 G3
series-connected heater strings. Out.elated Iype.
6CF6
line 7B, OUTLINES SECTION.
I
la.
Heater volts tac/dc), 3.15; amperes,
GI
0.6; warm-up time (average), 11 seconds. Peak heater-cathode volts: heater negative
with respect to cathode, 300 max; heater positive with respect to cathode, 200 max
(the de component must not exceed 100 volts). Except for heater and heatercathode ratings, this type is identical with miniature type 6CF6.
3CF6
PENT AGRID AMPLIFIER.
Miniature type used as gated amplifier in television receivers employing
1.lated Iype..
series-connected heater strings. Out4CS6,6CS6
line 7B, OUTLINES SECTION.
Heater volts (ac/dc), 3.15; amperes,
0.6; warm-up time (average), 11 seconds. Except for heater ratings, this type is
identical with miniature type 6CS6.
3 CS6
106
========= Technical Data =========
*
"4
SHARP-CUTOFF TETRODE
"
G2
H
C 5
3 Y
Miniature type used as rf amplifier in vhf tuners of television receivIS 2
ers employing series-connected heater
Related types:
strings. Outline 7B, OUTLINES SEC2CYS, 4CYS, 6CY5
G,
TION. Heater volts (ac/dc), 2.9; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6CY5.
3
~
•
IS
,7K
Po2
~
FULL-WAVE VACUUM RECTIFIER
Glass octal type used as power
supply in television receivers and other
2
7 PO, equipment having high dc requireIC
ments.Outline19D,OUTLINESSECFI
TION. Tube requires octal socket and
may be operated in any position. It is especially important that this tube, like
other power-handling tubes, be adequately ventilated. For discussion of Rating
Chart, refer to INTERPRETATION OF TUBE DATA. Filament volts (ac/dc),
3.3; amperes, 3.8.
F 3
3DG4
FULL· WAVE RECTIFIER
Maximum Ratings, (Desion·Maximum Values):
PEAK INVERSE PLATE VOLTAGE ..............................•••••••• ,.
PEAK PLATE CURRENT (Per Plate) .................................•.•
HOT-SWITCHING TRANSIENT PLATE CURRENT (Per Plate) ................•
AC PLATE SUPPLY VOLTAGE (Per Plate, rms) .........................••
DC OUTPUT CURRENT (Per Plate) ..................................•.•
BULB TEMPERATURE (at hottest point on bulb surface) .........•.•..•••••
1050 ma%
1.2 max
volto
amperes
amperes
See Rating Chart
See Rating Chart
6.5 max
200 mao;
°C
RATING CHART
-II
~
J ,I J
I
TYPE
3DG4
E
f '3,3 VOLTS AC
MAXIMUM OPERATING VALUES WITH: IrCHOKE-INPUT FILTER
0:
CAPACITOR-INPUT FILTER
~250 240
:l
0.
'"'"ffi 20 0 F
.3
~
;;;;
10 0
5
0
0.
I-
127.1.
I
:
r--t r- r- r-,..,..,
Bj"'-.,
E!\ C
I
15 0
~
u
-
,A
-
r:-
I
-- I - - 1-- r-- - - -:-
D
I
I
o
3251 375 G
100
200
300
400
AC PLATE SUPPLY VOLTS (RMS) PER PLATE (WITHOUT LOAD)
:33
o
92CS-109szn
Typical Operalion wilh Capacitor Input to Filten
AC Plate-to-Plate Supply Voltage (rms) ......•.••••••• _ .............. .
Filter-Input Capacitor" .....................••••.••.••.••...•.......•.•
Effective Plate-Supply Impedance per Plate ...• ~•••....••.•..........••
DC Output Voltage at Input to Filter (Approx.):
At full-load current of 350 ma ...........•••••••••.••••••••••• ' •••••
650
40
82
volt!
"f
ohms
800
volt!
Characteristics:
Tube Voltage Drop for plate current of 350 rna (per plate) •.••••.••...• _
26
volto
• Higher values of capacitance than indicated may be uoed, but the effective plate-supply Impedance
may have to be increased to prevent exceeding the maximum rating for peak plate current.
107
RCA Receiving Tube Manual
~
-p
SHARP-CUTOFF PENTODE
4
5
'H 3
. :::
6 G2
Miniature types used as intermediate-frequency amplifier in television
2
1
receivers. Outline 7B, OUTLINES
" .
Gs
Related type..
,
IS
6DK6,12DK6
SECTION. Heater volts (ac/dc), 3.15,
.§
amperes. 0.6; warm-up time (average),
11 seconds, Peak heater-cathode volts: heater negative with respect to cathode,
300 max; heater positive with respect to cathode, 200 max (the dc component must
not exceed 100 volts). Except for heater and heater-cathode ratings, this type is
identical with miniature type 6DK6.
30K6
30T6
SHARP-CUTOFF PENTODE
~4
5 II
Miniature types used as FM de[H 3
6 Ga
tector in television receivers employing
series-connected heater strings. Outline
"2
7 G~
Related types:
7B, OUTLINES SECTION. Heater
IS
,
4DT6A, 6DT6A
volts (ac(dc), 3.15; amperes, 0.6;
GI
warm-up time (average), 11 seconds. Except for heater ratings, these types are
identical with miniature types 6DT6 and 6DT6-A, respectively. Type 3DT6 is a
DISCONTINUED type listed for reference only.
30T6A
MEDIUM-MU TRIODE
Miniature type used as a localoscillator tube in uhf television receivers covering the frequency range
G2 .
7 P
Related types:
2DZ4,6DZ4
from 470 to 890 megacycles and emI
ploying series-connected heater strings.
P
Outline 7A, OUTLINES SECTION. Heater volts (ac/dc), 3.2; amperes, 0.45;
warm-up time (average), 11 seconds. Peak heater-cathode volts, 180 max (the dc component must not exceed 100 volts when heater is positive with respect to cathode).
Except for heater and heater-cathode ratings, this type is identical with miniature
type 6DZ4.
~H4
sP
30Z4
*
SHARP-CUTOFF PENTODE
H
G2
Miniature type used as rf ampli3
&
fier in vhf tuners of television receivers
"
K
Related type:
having series-connected heater strings.
IS 2
7 IS
6EA5
Outline 7B, OUTLINES SECTION.
Heater volts (ac/dc) 2.9; amperes,
GI'
0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is
identical with miniature type 6EA5.
3 EA5
SEMI REMOTE-CUTOFF PENTODE
3EH7
Related type ..
4EH7,6EH1
Miniature type used as if-amplifier tube in television receivers. Outline8C,OUTLINESSECTION.Heater
volts (ac/dc),3.4; amperes, 0.6; Except
for heater ratings, this type is identical
with miniature type 6EH7.
SHARP-CUTOFF PENTODE
3EJ7
Related types:
4EJ1,6EJ1
108
Miniature type used as if-amplifier tube in television receivers. Outline
8C, OUTLINES SECTION. Heater
volts (ac/dc), 3.4; amperes, 0.6. Except for heater ratings, this type is
identical with miniature type 6EJ7.
If
--======== Technical Data ========;;;;;;;;;;
*
HIGH-MU TRIODE
H4 5P
H 3
G2
& IS
I
7K
K
~
H4
Miniature type with frame grid
used in vhf tuners of television receivers. Outline 7B, OUTLINES SECTION. Heater volts (ac/dc), 2.8; amperes, 0.45. Except for heater ratings,
this type is identical with miniature
type 6ER5.
3ER5
1.laled Iv,e••
:lEIS,6EIS
51'
H·
3.
IS
HIGH-MU TRIODE
&
Miniature type used as rf-amplifier tube in vhf tuners of television re~2
7K
ceivers employing series-connected
flel.ted type ••
:lFH5,6FHS
heater strings. Outline 7B, OUTLINES
I
SECTION. Heater volts (ac/dc), 3;
amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6FH5.
*
3FH5
H
P
45
... 3
___ .
HIGH-MU TRIODE
&
IS
Miniature type with frame grid
used as grounded-cathode rf-amplifier
tube in vhf tuners of television reRelated type:
2GK5,6GK5
ceivers employing series-connected
I
K
heater strings. Outline 7B, OUTLINES
SECTION. Heater volts (ac/dc), 2.S; amperes, 0.45; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with miniature type 6GK5.
G 2
3GKS
7 K
H
SHARP-CUTOFF TWIN PENTODE
3GS8/
3BU8
Miniature type used as combined
sync separator, sync clipper, and agc
amplifier tube in television receivers
Related type:
employing series-connected heater
4GS8/4BU8
strings. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 3.15; amperes, 0.6. Except for heater ratings, this
type is identical with miniature type 4GSS/4BUS.
HIGH-MU TRIODE
Miniature type used as rf-amplifier tube in vhf television tuners. Outline 7A, OUTLINES SECTION.
Heater volts (ac/dc), 2.7; amperes,
0.45. Except for heater ratings, this
type is identical with miniature type
6HA5.
3HAS
Related Iype:
6HA5
H
SHARP-CUTOFF TWIN PENTODE
Miniature type used in agc amplifier, sync, and noise-limiting circuits of television receivers employing
Related type.:
series-connected heater strings. One
4Hsa, 6HS8
K
G3P,
pentode unit is used as a combined
sync separator and sync clipper; the other pentode unit is used as the agc amplifier.
3 HS8
109
RCA Receiving Tube Manual
Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 3.15; amperes, 0.6;
warm-up time (average), 11 seconds. Except for heater ratings, this type:s identical
with miniature type 6HS8.
H
SHARP·CUTOFF PENTODE
Miniature type with frame grid
used in if-amplifier stages of television
receivers utilizing intermediate frelelaleel typel:
4JC6,6JC6
quencies in the order of 40 megacycles
and employing series-connected heater
strings. Outline 8B, OUTLINES SECTION. Heater volts (ac/dc), 3.5; amperes,
0.6; heater warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6JC6.
3JC6
SHARP-CUTOFF PENTODE
Miniature type used as if-amplifier tube in television receivers utilizing intermediate frequencies in the orRelated typel:
4JD6,6JD6
der of 40 megacycles and employing
series-connected heater strings. Outline 8B, OUTLINES SECTION. Heater volts (ac/dc), 3.5; amperes, 0.6; warm-up
time (average), 11 seconds. Except for heater ratings, this type is identical with
miniature type 6JD6.
3JD6
BEAM POWER TUBE
GlaSB lock-in type used in output stage of
ac Ide Ibattery portable receivers. Outline 13A,
3LF4
OUTLINES SECTION. Tube requireB lock-in
socket. Filament volts (de), 1.4 (parallel), 2.8
(Beries); amperes, '.1 (parallel), 0.05 (Beries).
For electrical characteristics, refer to glass-octal
type 3Q5-GT. Type 3LF4 is used principally
lor renewal purposeB.
POWER PENTODE
3Q4
Miniature type used in outpu, otage of
lightweight, compact, portable battery-operated
equipment. Outline7B, OUTLINES SECTION.
Except for terminal connections, types 3Q4 and
3V
Miniature type used as rf amplifier in vhf tuners of television receivers
I~ 2
7 ~
employing series-connected heater
Related Iyp...
strings. Outline 7B, OUTLINES SEC2CY5, 3CY5, 6CY5
Gil
TION. Heater volts (ac/dc), 4.5; amperes, 0.3; warm-up time (average), 11 seconds. Except for heater ratings, this type
is identical with miniature type 6CY5.
113
H
sP
G2
4CY 5
RCA Receiving Tube Manual
~
SHARP-CUTOFF PENTODE
~
SHARP-CUTOFF PENTODE
4
5 P
Miniature type used in the gaincontrolled picture if stages of television
I< 2
7 G3
receivers utilizing an intermediate freRelated type:
IS
quency in the order of 40 megacycles
6DE6
G/
per second. Also used as an rf amplifier
in vhf television tuners. Outline 7B, OUTLINES SECTION. Heater volts (ac/dc),
4.2; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings,
this tube is identical with miniature type 6DE6.
H 3
___
4
6
,
G2
4DE6
"
4DT6
Miniature types used as FM detectorin television receivers employing
K 2
~ 7 G3 series-connected heater strings. Outline
Related types:
IS
,
7B, OUTLINES SECTION. Heater
3DT6A, 6DT6A
G,
volts (ac/dc), 4.2; amperes, 0.45;
warm-up time (average), 11 seconds. Except for heater ratings, these types are
identical with miniature types 6DT6 and 6DT6-A, respectively. Type 4DT6 is a
DISCONTINUED type listed for reference only.
"
3
6 G2
4DT6A
---
SEMI REMOTE-CUTOFF PENTODE
Miniature type used as if-amplifier tube in television receivers. Outline8C,OUTLINES SECTION. Heater volts (ac/dc), 4.4; amperes, 0.45;
Except for heater ratings, this type is
identical with miniature type 6EH7.
4EH7
Related types:
3EH7,6EH7
SHARP-CUTOFF PENTODE
Miniature type used as if-amplifier tube in television receivers. Outline
8C, OUTLINES SECTION. Heater
volts (ac/dc), 4.4; amperes, 0.45. Except for heater ratings, this type is
identical with miniature type 6EJ7.
4EJ7
Related types:
3EJ7.6EJ7
V ARIABLE-MU TWIN TRIODE
Miniature type used in directcoupled cathode-drive rf amplifier circuits of television receivers employing
Relatod type:
series-connected heater strings. Out6ES8
PT2
line 8B, OUTLINES SECTION.
Heater volts (ac/dc), 4; amperes, 0.6; warm-up time (average), 11 seconds. Except
for heater ratings, this type is identical with miniature type 6ES8.
4ES8
"
*
4
5
SHARP-CUTOFF PENTODE
Miniature type used in the gaincontrolled picture-if stages of vhf tele2
7
vision receivers operating at an interRelated type..
I<
G3
mediate frequency in the order of 40
5EW6.6EW6
I
IS
G,
megacycles per second. Outline 7B,
OUTLINES SECTION. Heater volts (ac/dc), 4.2; amperes, 0.6; warm-up time
(average), 11 secon
Go
I-
g
g
50
-
6.25 ma.. amperes
See Rating Chart
See Rating Chart
LI JI
1
TYPE
E
• ~ 5AU4
VOlTS AC
f
MAX/MUM 0PEI/1lT1Mr VALUES WITHICHOKE -INPUTI'lLTER
CAPACITOR-INPUT FII.TER
Go
volta
ma
._-
~
-
~
..........
~~
~
0
I
~e
o
G
100
200
300
400
500
AC P~ATE SUPP~Y VO~TS IRMS) PER P~ATE IWITH0.'Q..t?~,o1
119
RCA Receiving Tube Manual
Typical Operatian:
Filter Input
AC Plate-to-Plate Supply Voltage (rms) ....•.•.•.....•....
Filter-Input Capacitor. . . .
. . . . . . . . . . . . . . . . ..
Effective Plate Supply Impedance per .'late. . . . . . . . . . . . . . ..
Filter-Input Choke ..................................... .
DC Output Current .....................................
DC Output Voltage at Input to Filter (Approx.) ............
Capacitor
600 800
40
40
30
50
350
275
Choke
1000
325
395
10
325
395
volts
"I
ohms
henries
ma
volts
50
volts
4.7
0.6
11
volt.
ampere
leconds
1. 5
2
0.34
pi
pi
pf
0.04 ma:e
pi
pi
pi
pi
pi
pi
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 350 rna (per plate) ..........•.••.•
SAV8
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in television re- PT
ceivers employing series-connected
heater strings. Outline 8B, OUTLINES
SECTION. Tube requires miniature
nine-contact socket and may be
mounted in any position.
HEATER VOLTAGE (Ac/nc) ...................................•.••••••
HEATER CURRENT.. ..
. .....................•....•••••.•.••••
HEATER WARM-UP TIME (Average) ..................................•
3
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate ................................................••
Grid to Cathode and Heater ..................................... .
Plate to Cathode and Heater ...................................•
Pentode Unit:
Grid No.1 to Plate ............................................•
GridN 0.1 to Cathode,Heater, GridN 0.2, GridN 0.3, and Internal Shield .•
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ..
Triode Grid to Pentode Plate ........................................ .
Pentode Grid No.1 to Triode Plate ................................... .
Pentode Plate to Triode Plate ......................................•
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ....................... " .............. .
GRID No.2 SUPPLY VOLTAGE ... '" ......................•
GRID -No.2 (SCRIOION-GRID) VOLTAGIO ....................•
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive_bias value ...•
PLATE DISSIPATION ...................................••
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ..............••
For grid-N 0.2 voltages between 150 and 300 volts .....•
7
3
0.005
0.006
0.045
Triode Unit Pentode Unil
300 max
300 max
volts
300 max
volts
See curve page 70
o max
o max
volts
2 ma.,
watts
2.5 ma:e
0.5 max
watt
See curve page 70
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .............••
Heater positive with respect to cathode .............••
200 max
200 0 max
200 max
200 oma:e
volts
volts
Characteristics:
200
200
volts
Plate Supply Voltage ..................................•
150
volt.
Grid-N 0.2 Supply Voltage ..............................•
-6
Grid-No.1 Voltage ..................................... .
volts
180
Cathode-Bias Resistor .................................•
ohm.
19
Amplification Factor ................................... .
ohms
5750
800000
Plate Resistance (Approx.) .............................•
ohms
6200
3300
pmhos
Transconductance ...................................... .
-19
-8
Grid-No.1 Voltage (Approx.) for plate current of 10 /La ..... .
volts
13
9.5
ma
Plate Current ......................................... .
2.8
Grid-No.2 Current ....................................•
rna
Grid-No.1-Circuit Resistance:*
0.5 max
For fixed-bias operation ............................. .
0.25 ma" megohm
1.0 max
1.0ma:e megohm
For cathode-bias operation .........................•
\!I The dc component must not exceed 100 volts.
If either unit is operating at maximum ra.ted conditions, grid-No.l-circuit resistance for both unit.
should not exceed the stated values.
*
120
Technical Data
{J
PD!
FULL-WAVE VACUUM RECTIFIER
bPDI
Glass octal type used in power supplies of radio and television receivers
r 2
having high dc requirements. Maximum dimensions :over-all length, 5-3/16
I
8
NC
r
inches; seated length, 4-5/8 inches;
diameter, 1-9/16 inches. Tube requires octal socket and may be operated in any
position. It is especially important that this tube, like other power-handling tubes,
be adequately ventilated. Filament volts (ac!dc), 5; amperes, 3.7. For discussion of
Rating Chart, refer to INTERPRETATION OF TUBE DATA.
5AW4
FULL· WAVE RECTIFIER
Maximum Rating., (Design-Center Values):
PEAK INVERSE PLATE VOLTAGE ......................................•
PEAK PLATE CURRENT (Per Plate) ...................................•
1550 max
750 max
volt"
rna
HOT-SWITCHING TRANSIENT PLATE CURRENT
(Per Plate) maximum duration 0.2 second .. ...................... .
AC PLATE SUPPLY VOLTAGE (Per Plate, rms) ........................... .
DC OUTPUT CURRENT .........•.....................................
Typical Operation:
Filter Input
AC Plate-to-Plate Supply Voltage (rms) ....•..............
Filter-Input Capacitor ............................. .
Effective Plate Supply Impedance per Plate ............... .
Filter-Input Choke ..................................... .
DC Output Current .................................... .
DC Putput Voltage at Input to Filter (Approx.) ...........•
Capacitor
900
10
153
250
422
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 250 rna (per plate) .............••
RATING
4 max amperes
See Hating Chart
See Rating Chart
Choke
1100
volts:
"f
10
250
440
ohms
henries
rna
volts.
50
volts
CHART
TYPE 5AW4
Ef :5 VOLTS AC
r
LX'MU~
I OPE1T1NG lALUES
WITH'
HOKE -INPUT FILTER
rCAPACITOR-I~UT FILTER
OF A
-'-
125 1
-
-':':-::
i::-:=
~ ~c
1
1
1
1
•
•
0
•
40'
O
PO:
SNC
6 POI
NC 3
r
2
7
I
NC
8
BS
F
NC
o
44o!
100
200
300,
-
400
I'" 0
540 G
500
600
700
AC PLATE SUPPLY VOLTS (RMS) PER PLATE (WITHOUT LOAD)
92C$-1!205T
FULL-WAVE VACUUM RECTIFIER
Lock-in type used in power supply of radio
equipment having moderate de requirements.
Outline 13B, OUTLINES SECTION. Tube requires lock-in socket. Filament volts Cac), 5.0;
amperes, 2.0. Maximum ratings as full-wave
rectifier: peak inverse plate volts, 1400 max;
peak plate rna. (per plate), 375 max; dc output
rna., 125 max. This type is used principally for
renewal purposes.
Typical Operation.
Filter Input
AC Plate-to-Plate Supply Voltage (rmo) ..... ' ............•
Filter-Input Capacitor ..................................•
Total Effeetin Plate-Supply Impedance Per Platet ........•
Filter-I.put Cheke ........................... ' •.......••
Capacitor
700
4
IiO
5AZ4
Choko
1000
ToltlO
"I
ohms
henries
121
RCA Receiving Tube Manual
Filter Input
Capacitor
Choke
DC Output Current ................................... ~
125
125
ma
DC Output Voltage at Input to Filter (Approx.):
At half-load current (62.5 rna.) . . . . . .. . . . . . . . . . . • . . . . •
392.5
405
volts
Atfull-load current (125 rna.) ......•..........•.....•
340
332
volts
Voltage Regulation (Approx.):
Half-load to lull-load current ........................
52.5
23
volts
t When a filter-input capacitor larger than 40 ~~ is used, it may be necessary to use more plate-supply
impedance than the value shown in order to limit the peak plate current to the rated value.
H
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as combined
vhf oscillator and mixer in television
receivers employing series-connected
heater strings. Outline 8B,OUTLINES
SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. Heater volts (ac/dc),
4.7; amperes, 0.6; warm-up time (average), 11 seconds.
588
CLASS Al AMPLIFIER
Trio.u
Pentod.
Maximum Ratings, (Design-Center Values):
Unit
Unit
PLATE VOLTAGE ...................................... ..
800 ma:J:
300 max
volts
GRll} _'0.2 (SCREEN-GRID) SUPPLY VOLTAGE .. " ...........•
300 max
volts
GRID-No.2 VOLTAGE .................••...............••
See curve page 70
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ..•••
o ma:J:
o max
volts
2.5 mao;
PLATE DISSIPATION. . . . • . . . . . . . . . . . • . . . •• ....••.•...• ••
2 max
watts
GRID No.2 INPUT:
For grid-No.2 voltages up to 150 volts ...........••.•....
0.5ma",
watt
For grid-No.2 voltages between 150 and 300 volts ..•••••.•
See curve page 70
PEAK HEATER-CATHODE VOLTAGE:
200 max
Heater negative with respect to cathode ........•.•...•.•
200 max
volts
200-mao;
200-mao;
Heater positive with respect to cathode. • . •.•••..•.•••
volts
Cha ra cteristicSl
200
Plate Supply Voltage ....................... " .......... ,
200
volts
Grid-No.2 Supply Voltage ......•.....•.•••. " ........... ,
160
volts
-6
Grid Voltage ........................•................•
volts
Cathode-Bias Resistor. .. . .............................. .
180
ohms
Amplification Factor. . . . . .. . .. .. .... .... .. .......... ..
19
800000
Plate Resistance (Approx.) ............................... . 5750
ohms
8800
6200
Transconductance ...........•..........................
I'mhos
13
Plate Current ......................................... .
9.5
ma
Grid-No.2 Current. • . • . . . . .. .. . . . . . . • . . . .. • . . . . . . ... . .•
2.8
rna
-19
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a ..••
-8
volts
Maximum Circuit Values:
Grid-No.1-Circuit Res!stance*:
0.5 max
For fixed-biaB operation ........•.••.....•..............
0.25 max megohm
LOmax
For cathode-bias operation ............................. .
1.0 max megohm
• The de component mUlt not exceed 100 volt••
• If either unit i. operated at maximum rated condition., grid-No.1-circuit resi.tance for both units
should not exceed the .tated values.
FULL-WAVE VACUUM RECTIFIER
N ovar type used in power supplies
of radio equipment and television receivers having high dc requirements.
Outline 17B, OUTLINES SECTION.
Tube requires novar nine-contact
Pill
socket. Vertical operation is preferred, but tube may be operated in horizontal
position if pins 2 and 7 are in vertical plane. It is especially important that this
tube, like other power-handling tubes, be adequately ventilated. Filament volts
(ac), 5; amperes, 3.
58C3
122
========= Technical Data =========
FUll- WAVE RECTIFIER
Maximum Ratings, (D ••ign-Mazimum Valu •• ):
PEAK INVERSE PLATE VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
PEAK PLATE CURRENT (Per Plate) ....................................•
HOT-SWITCHING TRANSIENT PLATE CURRENT (Per Plate)· •..............•
AC PLATE-SUPPLY VOLTAGE (Per Plate, rms) ..........................•
DC OUTPUT CURRENT (Per Plate) .................................... .
Typical Operation with Capacitor Input to Filter.
AC Plate-to-Plate Supply Voltage (rms) ...........••
Filter-Input Capacitor- ..........................•
Total Effective Plate-Supply Impedance per Plate ....
DC Output Voltage at Input to Filter (Approx.):
300 ma .....................
At load current of:
276 ma .....................
162 ma ....................•
160 rna .....................
137.6ma .....................
81 ma .....................
600
40
21
900
40
67
1700 m"'"
volta
1 max
ampere
6 max amperes
See Rating Chart
See Rating Chart
1100
40
97
290
'60
680
336
620
680
volta
~f
ohms
voltl
voltl
volta
voltl
volta
voltl
Typical OperatIon with Choke Input to Filter.
AC Plate-to-Plate Supply Voltage (rms) ...........••.•.•••
900
1100
voltl
10
Filter-Input Choke .....................................•
10
benriee
DC Output Voltage at Input to Filter (Approx.):
840
348 ma ........................
At load current of:
voltl
275 ma .......................•
440
volta
866
174 ma ........................
volta
137.5 ma ........................
456
volts
o If hot switching is regularly required in operation, the use of choke-input circuits is recommended.
Such circuits limit the hot-switching current to a value no higher than that of the peak plate current.
When capacitor-input circuits are used, a maximum peak current value per plate of 5 amperes during
the initial cycles of the hot-switching transient should not be exceeded.
• Higher values of capacitance than indicated may be used, but the effective plate-supply impedance
may have to be increased to prevent exceeding the maximum rating for peak plate current.
RATING CHART
I
TYPE VOLTS
5BC3 AC
Ef1l5
-
OF A
190
I
0
I
I
95 I
f--l. t-- f-
-- -
I
I
111 1
MAXIMUM OPERATING VALUES WITH: CHOKE-INPUT FILTER
r,CAPACITOR-INPUT FILTER
- --
"1"'",
E~
-- 0
I
I
o
AC
&&
G
100
200
P~ATE SUPP~Y
300
400
500
WO
VOLTS (RMS) PER PLATE (WITHOUT
~OAO)
92:CS~ll&oon
"
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as combined vhf mixer
and oscillator tube in television receivers employing series-connected heater strings. Outline
8B, OUTLINES SECTION. Tube requires miniature nine-contact socket. Heater volt. (ac Idc) ,
4.7; amperes, 0.6; warm-up time (average), 11
seconds. Characteristics of triode unit as class A. amplifier: plate supply volts, 160 (300 ma.,), cathodebias resistor, 56 ohms; amplification factor, 40; plate resistance (approx.), 5000 ohms; tranaconductance
8500 I'm~lOS; plate ma., 18; plate dissipation, 2.5 ma., watts. Pentode unit: plate supply volt., 250 (300
max); gnd-N 0.2 supply volts, 110 (300 max); cathode-bias resistor, 68 ohms; plate resistance (approx.),
0.4 megohm; transconductance, 5200 #Lmhos; plate ma., 10; grid-No.2 ma., 3.5; plate dissipation 2.8
max: watts; grid-No.2 input, 0.5 maz watt. Thia type is ueed principally for renewal purpose..
'
SBES
123
RCA Receiving Tube Manual
H
MEDIUM-MU TWIN TRIODE
5B K7A
Miniature type used in directcoupled cathode-drive rf amplifier cirRelated type:
cuits of vhf television tuners utilizing
61\K7B
series-connected heater strings. OutI
line SB, OUTLINES SECTION.
PTZ
IS
Heater volts (ac/dc), 4.7; amperes, 0.6; warm-up time (average), 11 seconds. Except
for heater ratings, this type is identical with miniature type 6BK7-B.
MEDIUM-MU TWIN TRIODE
Miniature type used in directcoupled cathode-drive rf amplifier cirRelated types:
cuits of vhf television tuners employ4BQ7A.6BQ7A
ing series-connected heater strings.
Outline SB, OUTLINES SECTION.
Heater volts (ac/dc), 5.6; amperes, 0.45; warm-up time (average), 11 seconds.
Except for heater ratings, this type is identical with miniature type 6BQ7-A.
5BQ7A
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
H
5BRa
Miniature type used in a wide
Kp
variety of applications in color and
S G3p
black-and-white television receivers
IS
employing series-connected heater
strings. Outline SB, OUTLINES SECTION. Heater volts (ac/dc), 4.7; amperes, 0.6; warm-up time (average), 11 seconds.
Except for heater ratings, this type is identical with miniature type 6BRS-A.
Related type.
6BReA
TWIN DIODESHARP-CUTOFF PENTODE
5 BT a
H
Miniature type used in a variety of appliH
cations in television receivers employing series- KO &02 4
connected heater string.. The pentode unit is I
used as an if amplifier. video amplifier, agc amplifier, or reactance tube. The diode unit is
used in automatic-frequeney-control and detector circuits. Outline8B,OUTLINES SECTION.
Heater volts (ac/dc), 4.7; amperes, 0.6; warmup time (average), 11 seconds. Tube requires
Kp
miniature nine-contact socket. Characteristics of pentode unit as class AI amplifier: plate supply volts,
200 (300 mao:); grid-No.2 supply volts, 150 (300 m:
#
volts
ampere
See Rating Chart
See Rating Chart
RATING CHART
TYPE 5U4-GB
EI·5 VOLTS AC
~
if.
III
Go
MAXIMUM OPERATING VALUE3" WITH:
1
150
iii 100
!;
Go
0-
S
g
rCHg~~;~~:~:_~~~Tu~ FILTER.
200
FA
175
_
:::~15 __
I
1
81..1 _
I
I
:......t.
.~
8f'
-- !\:
-- --- -- -i-
-"">c
1
~D
I
50
I
I
1
1450 G 550
48
o
100
200
300
400
500
600
AC PLATE SUPPLY VOLTS IRMS} PER PLATE (WITHOUT LOAD)
1J2CS-84~OTI
Typical Operation of 5U4·GB with Capacitor Input to Filter:
AC Plate-to-Plate Supply Voltage (rma). • • • • • • • • •• •
Filter-Input CaJlacitor*. • • • • • • • • • • • • • • • • • • • • • • • • • •
Total Effective Plate-'Supply Impedance per Plate. • • •
130
600
40
21
900
40
67
1100
40
97
volts
"f
ohma
========= Technical Data =========
DC Output Voltage at Input to Filter (Approx.):
150 rna ............. .
{ 137.5 rna ............. .
81 rna ............. .
300 rna ............. .
{
At full-load current of
275 rna ............. .
162 rna ............. .
Voltage Regulation (Approx.):
Half-load to full-load current .................. .
335
At half-load current of
520
290
630
volts
volt.
volts
volt.
volts
volt.
60
volt.
680
460
45
60
Typical Operation of SU4-G8 with Choke Input to Filter:
AC Plate-to-Plate Supply Voltage (rma) .................... . 900
1100
volt.
Filter-Input Choke ..................
10
10
henries
DC Output Voltage at Input to Filter (Approx.):
volt.
At half-load current of o[
174 rna ...................... . 355
137.5 rna ...................... .
455
volts
volt.
At full-load current of {
348 rna ...................... . 340
275 rna ...................... .
440
volts
Voltage Regulation (Approx.):
Half-load to full-load current ........................... .
15
15
volts
#Il hot switching is regularly required in operation, the use of choke-input circuita is recommended.
Such circuits limit the hot-switching current to a value no higher than that of the peak plate current.
When capacitor-input circuits are used, a maximum peak current value per plate of 4.6 amperes during
the initial cycles of the hot-switching transient should not be exceeded.
*Higher values of capacitance than indicated may be used, but the effective plate-supply impedance
may have to be increased to prevent exceeding the maximum rating for peak plate current.
0
OPERATION
•
0
•••••
0
•••••••••••••
CHARACTERISTICS
OPERATION CHARACTERISTICS
-
F'ULL WAVE CIRCUIT CHOKE INPUT TO FILTER
ULL-WAVE CIRCUIT, CAPACITOR 1NP UT TO FILTER
TYPE SU4-GB
Ef'=5.0 VOLTS AC
TYPE SU4-CB
E,f:' = 5.0 VOLTS AC
SUPPLY FREQUENCY 60 CPS
CAPACITOR (C) INPUT TO FILTER' 40 Uf'
TOTAL EFFECTIVE PLATE-SUPPLY IMPEDANCE
PER PLATE:
SUPPLY F'REQU[NCY=80CPS
SOLID-LINE CURV[S=CHOKES OF" INFINITE
INDUCTANCE
LONG-DASH LINES=BOUNOARY LINES rCR
CHOKE SIZES AS SHOWN
SHORT-DASH CURVES=REGULATION CURVES
FOR REPRESENTATIVE
CHOKE SIZES
,.
CURRENT-AND-VOLTACE BOUNDARY LINE CBA
IS THE SAME AS SHOWN ON RATINC CHART
=
~~~~EIIII ~ 2~ is !)~ 6~ ;2
:7
CURRENT-AND-VOLTAG£ BOUNDARY LINE 'DEA'=
SEE RATING CHART
f-- f-f.--- f--
7~
~
.......
t-.....
:5~ r-......
~
r-- f-.ll
;::!---: 1"--.
\¥,
I
o •
(.~
I~
!--
~S!
1-1\
°l\~~
~\
'"
400
92(;M-8448T
o
__
-~
~ V LTS RMS PER PLATE>:.
f! ~
= IM.
DC LOAt MILLIAMPERES
"
iii
~~~
U~
r-
t--
0
f--
i1t,
o '"\,'
F:::::::
~~
~t-RM t-- I--"'.!:!
t-- I-- ~ f--i
2~
j;:::::::
~
f-- 1-
4
-
ASO!~!:N cf 1614r _
0
18~
6
=
~
~~I
A
0
300
250
_/2on
100
/"
a
A
200
300
400
DC LOAD MILLIAMPERES
82C'-4-8447TI
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
sus
Miniature type used as combined
oscillator and mixer tube in AM/FM
receivers and television receivers emRelated types:
ploying series-connected heater strings.
6U8A,9U8A
Outline SB, OUTLINES SECTION.
Heater volts (ac/dc), 4.7: amperes, 0.6; warm-up time (average), 11 seconds. Except
for heater ratings, this type is identical with miniature type 6US-A.
131
RCA Receiving Tube Manual
:c
P~!
FULL-WAVE VACUUM RECTIFIER
NC
O
.
6 POI
3
Glass octal types used as power
supply in color television receivers and
7 NC
other equipment having high de re- f 2
quirements. Outline 19D, OUTLINES
I
8
SECTION. Tubes require octal socket.
NC
f
Vertical mounting is preferred, but horizontal mounting is permissible if pins 2
and 4 are in vertical plane. It is especially important that these tubes, like other
power-handling tubes, be adequately ventilated. For discussion of Rating Chart,
Tefer to INTERPRETATION OF TUBE DATA. Type 5V8 is a DISCONTINUED
type listed for reference only. Filament volts (ac/dc), 5; amperes, 8.8 (5V8),8(5V8-A).
5V3
SV3A
FULL· WAVE RECTIFIER
5V8
5V8-A
c~~:ifaiu•• Ma::::~:Valu ••
Maximum Ratings:
PEAK INVERSE PLATE VOLTAGE. . .........................
1400 maz
1550 mao:
PEAK PLATE CURRENT (Per Plate). . . . . ......... ..........
1.2 mao:
1.4 maz
HOT-SWITCHING TRANSIENT PLATE CURRENT (Per Plate). . . . .
5.5 mao:
6.6 mao:
AC PLATE-SUPPLY VOLTAGE (Per Plate, rms, without load) ... See Rating
550 maz
DC OUTPUT CURRENT (Per Plate). . . . . . . . . . . . . . . . . . . . . . . . .
Chart
415°maz
° With capacitor-input filter lor ac plate-supply volts (rms, per plate, without load) = 470.
Typical Operation:
Filte, Input
5V3
5V3-A
Capacito, Chok.
Capacito, Choke
A!J Plate-to-Plate ~up~IY Voltage (rms) ...................
Filter-Input CapaCItor .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
ElJective Plate-Supply Impedance per Plate. . . . . . . . . . . . . . ..
Minimum Filter-Input Choke. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Output Current .....................................
DC Output at Input to Filter (Approx.) ...................
Charade,isties:
850 1000
40
56
10
350 350
430 385
5VS
850
40
50
350
440
1000
10
350
390
volts
amperes
amperes
volts
ma
volts
,..1
ohms
henries
ma
volts
5V8-A
Tube Voltage Drop lor plate current of 350 ma (per plate). . .
47
42
volts
• When capacitor values greater than 40 ,..1 are used, the effective plate....upply impedance should be
increased so that the maximum rating lor peak plate current is not exceeded.
RATING CHART
TYPE 5V3
~
~250
E,'5 voeTS AC
F A
251-
~
.. 200
17!4 _
II!
~
I
::;
I
~ 150
.J
..
i 100
~Ol
:>
I~H~~~~~~~~~!,~~~~R flCTER
J
-- r-
I
8
:'\.
I
~ El\~c
EI
-- -- r- L~D
I
I
~
g
r--
MAXIMUM OPERATING VALUES WITH:
I
0
I
I
U
Q
5.5
o
G
1425
400 500
100
200
300
600
700 SOO
AC peATE suppey voeTs (RMS) PER peATE(WITHOUT eOAD)
.
SV4G
SV4GA
"",2(;'5-1023IT2
FULL-WAVE VACUUM RECTIFIER
H~
PO~
:0,
Glass octal types used in full-wave
power supplies having high de requirements. Outlines 26 and 19A, respectively, OUTLINES SECTION. Tubes
18 K
require octal socket and may be
NC
H
mounted in any position. The heater is designed to operate from the ac line through
a step-down transformer. The voltage at the heater terminals should be 5.0 volts
132
========- Technical Data ========under operating conditions at an average line voltage of 117 volts. It is especially
important that these tubes, like other power-handling tubes, be adequately ventilated. Heater volts (ac/dc), 5; amperes, 2.
FULL·WAVE RECTIFIER
Maximum Ratings,
(Desif/tl-Cenle, VaIU68):
PEAK INVERSE PLATE VOLTAGE .....•.................•...............
AC PLATE-SUPPLY VOLTAGE (Per Plate, rms):
With capacitor-input filter ..................•..................•....
With choke-input filter .................................•...........
PEAK PLATE CURRIINT (Per Plate) ........•............................
DC OUTPUT CURRENT ...••...•....................•.................
1400 maz
volts
375maz
500 maz
525maz
175 maz
volts
volts
ma
ma
Typical Operation.
Fill., l"pul
Chok.
CaplJIJilor
1000
volts
AC Plate-to-Plate Supply Voltage (rms). . . . . . . . • . . . . . . . . . . .
750
,.t
Filter-Input Capacitor·. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . .
10
ohms
Total Effective Plate-Supply Impedance per Plate. . . . . . . . . . .
100
henries
4
Filter·Input Choke ..................•........ : ......... .
DC Output Voltage at Input to Filter (Approx.) for dc output
volts
410
410
current of 175 mao .................................. .
*Higher values of capacitance than indicated may be used, but the effective plate-supply impedance
may have to be increased to prevent exceeding the maximum ratin:g for peak plate current.
;
I!:
&
'~'~+-+-+-~~~-r-+-+-;
g
O~O~~~~O~~I*~~~I~&O~~2~~~
DC LOAD .. ,LL,A .... ERES
92C.. ·.09OTI
~
2 <4
s GI
BEAM POWER TUBE
Glass octal type used as output
amplifier in television receivers em2
7
ploying series-connected heater strings.
R.I..... type..
'I
H
Outline 14C, OUTLINES SECTION.
6V6GT.12V6GT
~
8 G~
This type may be supplied with pin
No.1 omitted. Heater volts (ac/dc), 4.7; amperes, 0.6; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with glass octal type 6V6-GT.
II 3
l;:j
PO!
'D,
II
r
2
I
"IIW4
NG:IIW4-GT
8
r
5V6GT
FULL.WAVE VACUUM RECTIFIER
Metal type 5W4 and gla..-octal type 5W4-
GT are used in power supply of radio equipment
having low dc requirements. Outlines 5 and 14D,
respectively, OUTLINES SECTION. Both
types require octal socket. Filament volts (ac) ,
5.0; amperes, 1.5. Maximum ratings: peak In·
verse plate volts, 1400 ma:<; peak plate ma., 300
ma:<; dc output ma., 100 ma:<. These are DIS·
CONTINUED types listed for reference only.
5W4
5W4GT
133
RCA Receiving Tube Manual
FULL-WAVE VACUUM RECTIFIER
Glass octal type used in power supply of
radio equipment having large de requirements.
Maximum dimensions: over-all length, 5-5/16
inches; seated height, 4-3/4 inches; diameter,
2-1/16 inches. Filament volts, 5.0; amperes, 3.0.
Tube requires octal socket. Maximum ratings
as full-wave rectifier: peak inverse plate volts,
1550 max; peak plate amperes per plate, 675
max. Type 5X4-G is used principally for renewal purposes.
5X4G
O
NC
4
:01
P02 3
6 Ne
2
7
NC
f
,
8
NC
f
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as combined
oscillator and mixer in AM/FM reRelated types:
ceivers and television receivers em6XI, 19xa
ploying series-connected heater strings.
Outline 8B, OUTLINES SECTION.
Heater volts (ac/dc), 4.7; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater rating, this type is identical with miniature type 6X8.
5X8
~
PD:
FULL-WAVE VACUUM RECTIFIER
6 POI
Glass octal types used in power
supply of radio equipment having moderate de requirements. Type 5Y3-G,
r "
Outline 26, type 5Y3-GT, Outline 14D,
I
e
OUTLINESSECTION.Tubesrequire
NC
r
octal socket. Vertical tube mounting is preferred, but horizontal mounting is permissible if pins 2 and 8 are in horizontal plane. It is especially important that these
tubes, like other power-handling tubes, be adequately ventilated. For discussion
of Rating Chart and Operation Characteristics, refer to INTERPRETATION OF
TUBE DATA. Maximum ratings for type 5Y3-G as full-wave rectifier: peak inverse plate volts, 1400 max; peak plate mao per plate, 375 max. Type 5Y3-G is a
DISCONTINUED type listed for reference only. Filament volts (ac), 5; amperes, 2.
SY3G
5Y3GT
FULL·WAVE RECTIFIER
Maximum Ratings, (Design-Cenler Values):
PEAK INVERSE PLATE VOLTAGE ..................................... .
PEAK PLATE CURRENT (Per Plate) ................................... .
HOT-SWITCHING TRANSIENT PLATE CURRENT (Per Plate) .....•.•.........
AC PLATE SUPPLY VOLTAGE (Per P,late, rms) ........................•..
DC OUTPUT CURRENT (Per Plate) .......•.......................•....
RATING CHART
80
60
r
r- S
I
6t~
I
I
40 32,'1-
I
I
20
o
I II I
TYPE 5Y3-GT
Ef' 5 VO~TS AC
MAXIMUM OPERATING VALUES WITN.·
CHOKE-INPUT FI~TER
CAPACITOR-INPUT FILTER
F A
r---
~. ~C
8 1"
-- ---
,
I
I
I
"I-
,
~D
I
I
135(
:62
100
-
200
300
400
G
500
AC PLATE SUPPLY VOLTS (RMSI PER PLATE (WITHOUT LOADI
t2t'S-l'SHTa
134
5Y8-GT
vol t.
1400 max
440 ma.:
rna
2.5 ma.,
ampere.
See Rating Chart
See Rating Chart
========= Technical Data ==------=====
Typical Operation of 5Y3·GT with Capacitor Input to Filter.
AC Plate·to-Plate Supply Voltage (rms) ........ .
700
20
Filter Input Capacitor· •••••.•................
60
Effective Plate-Supply Impedance per Plate ..... .
DC Output Voltage at Input to Filter (Approx.):
At half-load current of } 62.6 ma ........................• 390
42 ma ........................ .
At full-load current Of} 126 ma ........................ . 360
84 ma ........................ .
Voltage Regulation (Approx.):
40
Half-load to full·load current .•............•
1000
10
140
volts
pf
ohm.
660
volt.
volta
volt.
volt.
60
volt.
610
Typical Operation of 5Y3·GT with Choke Input to Filter.
700
1000
AC Plate-to-Plate Supply Voltage (rms) ....... "
volt.
10
10
henries
Filter Input Choke# ....................... "
DC Output Voltage at Input to Filter (Approx.):
volta
At half-load current Of}
76 ma ........................• 270
62.6 rna ........................•
406
volta
246
volts
At fu. ll-load current Of} 160 rna ........................•
380
126 ma ........................ .
volta
16
26
Voltage Regulation (Approx.): Half-load to full-load current ..... .
volta
• Higher values of capacitance than indicated may be used but the effective plate supply impedance
may have to be increased to prevent exceeding the maximum rating for hot-switching transient plate
current.
# This value is adequate to maintain optimum regulation in the region to the right of line L=10H on
curve OPERATION CHARACTERISTICS with Choke Input to Filter, provided the load current.
are not less than 35 rna., and 50 ma., respectively, for Plate-to-Plate supply voltages of 700 and 1000
volts (rms).
OPERATION CHARACTERISTICS
rULL-WAVE
E4"= ~.o VOLTS "C
rlLTER-INPUT C"PACITOR
=10;<4"
TOT..L EfrECT. PL"TESUPPLY ,,,PEO.. NCE PER
TYPE SY3-GT
700
~
600
...
a:
!:;
;;:
.g
~
7"
e~
~oo ---'
~
"00
~
..
~
PL ..TE
:---.....
~
..........
~ ..........
~ .....
........
...........
o O~t1~vt~R,,~
'''0 OH.. S rOR
CURVES 6-8
..OK = SEE R..TING
I\,A
CHART
\
"' .
~
, ~ r- ............ -.:\\
""rot
.. 300
u
I,
~
...........
...........
100
o
--\
------- -\
-\
O
~O-
.I&..:.
\
-........;-
:0,
PD2 3
6 NC
2
7
NC
I
NC
8
r
r
-
\
-
40
80
'20
OC LO.. O "'LL'A .. PERES
NC..
fULL-W"VE CIRCUIT CHOKE INPUT TO rlLTER
TYPE SY3-GT
r
a -3, ~ ~~"
............
~ 2.>.... ~ ......
0200
OPERATION CHARACTERISTICS
CIRCUIT CAP"CITOR INPUT TO rlLTER
~~,1"
\K
160
92C"-739~T
iK
O~~---..~0~-L--~60~--L-~I20~~~~,~60
DC LOAD .. ,LL, .... PERES
92C"-7394T
FULL-WAVE VACUUM RECTIFIER
Glass octal types used in power
supplies of radio equipment having
moderate DC requirements. Outlines
26, 14D, and 19D, respectively, OUTLINES SECTION. Tubes require octal socket. Type 5Y4GT is supplied
5Y4G
SY4GA
SY4GT
135
RCA Receiving Tube Manual
with pins 4 and 6 missing. Vertical tube mounting is preferred, but horizontal mounting is permissible: if pins 2 and 7 are in horizontal plane (5Y4-G); if pins 1 and 4 are
in vertical plane (5Y4-GA); if pins 2 and 3 are in vertical plane (5Y4-GT). It is
especially important that these tubes, like other power handling tubes, be adequately
ventilated. For discussion of Rating Chart, refer to INTERPRETATION OF
TUBE DATA. Maximum ratings for type 5Y4-G as full-wave rectifier: peak inverse plate volts, 1400 max; peak plate mao per plate, 375 max (transient amperes,
2.2 max). Type 5Y4-G is a DISCONTINUED type listed for reference only. Filament volts (ac/dc), 5; amperes, 2.
FULL· WAVE RECTIFIER
Maximum Ratings, (Design-Center Value):
PEAK INVERSE PLATE VOLTAGE ..................................... .
PEAK PLATE CURRENT (Per Plate) ....... '" ... '" '" ................ .
HOT-SWITCHING TRANSIENT PLATE CURRENT ......................... .
AC PLATE SUPPLY VOLTAGE (Per Plate, rms) .......................... .
DC OUTPUT CURRENT (Per Plate) ................................... .
5Y4-GA
5YJ,-GT
1400 max
volts
400 max
rna
2.2 max amperes
See Rating Chart
See Rating Chart
Typical Operation of 5Y"·GA & 5Y"·GT:
Filter Input
AC Plate-to-Plate Supply Voltage (rms) .................. .
Filter·Input Capacitor· ................................. .
Total Effective Plate-Supply Impedance per Plate ......... .
Filter-Input Choke ..................................... .
DC Output Current .................................... .
DC Output Voltage at Input to Filter (Approx.):
At full-load current (125 rna.) ....................... .
Capacitor
700
10
50
Choke
1000
125
10
125
volts
I'f
ohm.
henries
rna
350
390
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 125 rna (per plate) . . . . . . . . . . . . . .
60
volts
• Values of capacitance greater than 20 I'f may be used, provided the plate-supply impedance i. incr
150
~
200
250
PLATE VOLTS
-4
.00
Cathode-Bias Resistor .............................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Grid-No.1 Voltage (Approx.) for plate current of 20 "a........ . ....... .
Grid-No.1 Voltage (Approx.) for plate current of 2 rna and cathode-bias
resistor of 0 ohms ............................................... .
Plate Current ...................................................... .
Grid-No.2 Current ................................................. .
56
0.3
7800
-6
ohm.
ml!gohm
"mhos
volts
-3
12.5
3.2
volts
ma
ma
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation . ...................................... .
0.25 max
1.0 max
megohm
megohm
DIODE UNIT
Maximum Ratings, (Design-Maximum Values):
DC PLATE CURRENT .......................................... .' ..... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......................•......
Heater positive with respect to cathode ............................•
°The de component must not exceed 100 volts.
"
~
~
5 max
ma
200 max
200 0 max
volts
volt.
HIGH-MU TRIODE
Miniature type used as mixer or
rf amplifier in cathode-drive circuits
G 2
7 p
of uhf television tuners covering the
frequency range of 470 to 890 megap I
cycles per second. Outline 7A, OUTLINES SECTION. Tube requires miniature seven-contact socket and may be
mounted in any position. Heater volts (ac/dc), 6.3; amperes, 0.225.
K
eG
H 3
6AN4
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
PLATE DISSIPATION ................................................. .
CATHODE CURRENT ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
300 max
4 max
30 max
volts
watt.
ma
200 max
200·max
volts
volts
Characteristics:
Plate-Supply Voltage ................................................ .
Cathode-Bias Resistor ............................................... .
Amplification Factor ................................................ .
Transconductance . .................................................. .
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . ............... .
Grid Voltage (Approx.) for plate current of 20 "a. . . . .. . .............. .
200
100
70
10000
13
-7
volts
ohms
"mhos
ma
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation ........................................... .
For cathode-bias operation ........................................ .
0.1 max
0.5 max
megohm
megohm
• The de component must not exceed 100 volts.
H
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
6AN8
Miniature types used in a wide
variety of applications in color television receivers. The 6AN8-A has a conRelated type:
5ANS
trolled heater warm-up time for use in
receivers employing series-connected
heater strings. The pentode unit is used as an intermediate-frequency amplifier, a
video amplifier, an agc amplifier, or as a reactance tube. The triode unit is used in
low-frequency oscillator, sync-separator, sync-clipper, and phase-splitter circuits.
Outline 8B, OUTLINES SECTION. Tubes require miniature nine-contact socket
and may be mounted in any position. Type 6AN8 is a DIS(;QNTINUED type
listed for reference only.
5
6AN8A
HEATER VOLTAGE (AC/nc).....
. ............... '" .................. 6.3
HEATER CURRENT.. ...........
. ..................................... 0.45
HEATER WARM-UP TIME (Average) 6AN8-A......... ...................
11
volts
ampere
seconds
147
RCA Receiving Tube Manual
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate. .. .. ....................•............................• 1.5
Grid to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . 2.0
Plate to Cathode and Heater .....................••••.............. " 0.26
Pentode Unit:
Grid No.1 to Plate .................................................. 0.04 max
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield...
7
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield.... . .. 2.4
Triode Grid toPentode Plate ............................................. 0.02
Pentode Grid No.1 to Triode Plate ........................................ 0.02
Pentode Plate to Triode Plate ............................................ 0.15
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ...................................... .
GRID-No.2 SUPPLY VOLTAGE ................... , ...... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................... .
GRID-No.1 (c:ONTROL-GRID) VOL'rAGE, Positive-bias value .. .
PLATE DISSIPATION ................................... .
GRID-No.2 INPUT:
For grid,No.2 voltages up to 165 volts ............... .
For grid-No.2 voltages between 165 and 330 volts .. , .. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........ " .. " .
Heater positive with respect to cathode .............. .
Characteristics:
Plate Supply Voltage ................................. .
Gr!d-No.2 Supply Voltage ............................ ..
Gnd-No.l Voltage .................................... .
Cathode-Bias Resistor ...•.............................
Amplification Factor ................................. ..
Plate Resistance (Approx.) ............................ .
Transconductance . ................................... .
Grid-No.1 Voltage (Approx.) for plate current of 20"a .... .
Grid-No.1 Voltage (Approx.) for plate current of 1.6 ma and
cathode-bias resistor of 0 ohms .................... .
Plate Current ...........................••............
Grid-No.2 Current ................................... .
Triode Unit
330 max
o max
2.8 max
pI
pI
pI
pI
pI
pI
pf
pI
pI
Pentad. Unit
330 max
330 max
volts
volts
See curve page 70
volts
o max
2.3max
watts
0.55 max
watt
See curve page 70
200 max
200 max
2000 max
2000 max
Triode Unit
Pentode Unit
volts
volts
21
4700
4500
-17
56
volts
volts
volts
ohm.
170000
7800
-6
ohms
"mhos
volts
15
-3
12
3.8
volts
ma
ma
150
-3
125
125
Maximum Circuit Values.
Grid-N o.I-Circuit Resistance:For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . • . . . . ..
0.5 max
0.25 max megohm
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . .
1. 0 max
1. 0 max megohm
°The de component must not exceed 100 volts.
*If either unit is operating at maximum rated conditions, grid-N o.l-circuit resistance for both units
should not exceed the stated values.
BEAM POWER TUBE
6AQ5
Miniature types used as output
amplifiers primarily in automobile receivers and in' ac,operated receivers
Related types:
and, triode-connected, as vertical de,
SAQ5,12AQS
flection amplifiers in television receivers. Type 6AQ5-A has a controlled heater warm-up time for use in television
receivers employing series-connected heater strings. Outline 7C, OUTLINES SECTION. Tubes require miniature seven-contact socket and may be mounted in any
position. Within their maximum ratings, the performance of these types is equivalent to that of larger types 6V6 and 6V6-GTA. Type 6AQ5 is a DISCONTINUED
type listed for reference only.
6AQSA
HEATER VOLTAGE (AC/DC) .••.....................................•..
6.3
volts.
HEATER CURRENT .................................................. .
ampere
0.45
HEATER WARM-UP TIME (Average) for 6AQ5-A ........................ .
11
seconds
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
pI
Grid No.Ito Plate...............................................
0.4
pI
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3. . . . • . . . . . . . •
8
Plate to Cathode, Heater, Grid No.2, and Grid No.3. . . . . .. ..........
8.5
pI
AMPLIFICATION FACTOR-................................... ..........
9.5
PLATE RESISTANCE (Approx.)*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1970
ohm.
TRANSCONDUCTANCE* ................. '" ............................
4800
"mhos
GRID-No.1 VOLTAGE (Approx.) for plate current of 0.5 rna.. . . . . .
-37
volts
* Grid No.2 connected to plate; plate and grid-No.2 volts, 250; grid-No.1 volts, -12.5; plate rna., 49.5.
148
========= Technical Data
AVERAGE
CHARACTERISTICS
PENTOD£" CONNECTION
2~0
;;-f-\
'{
,..rei
--
.r.:. P-'"
.f '. I-V
I,.
~
~--
o
--
'.
TYPE 6AQ5-A I
+1>
Ef::6.3 VOLTS
GAID-N.Z VOLTS
'"
W
0:
=2~O
W
,10
J
;....
O~:;
.J
20i
,oiv
+~
- - - -
-
~+I!)
E.£':.r
zI
0
o
~
GRID-N21 VOLlS Ecl'=-'s
-10
- - -- --0
1---'2.$
'5
20
__ ECI=+ISo
100
-30
~oo
.sOD
PLATe VOLTS
300
200
92Ct.4-4e01T2
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
275
275
12
2
PLATE VOLTAGE .................................................... .
GRII~No.2 (SCREEN-GRID) VOLTAGE .................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT ....................................•..............
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......................... .
Heater positive with respect to cathode .......................... .
BULB TEMPERATURE (At hottest point) .............................. .
max
max
max
max
volts
volts
watts
watts
200 max
200·max
250 max
volts
volt.
°C
• The dc component must not exceed 100 volts.
Typical Operation:
Same as for type 6V6-GTA within the limitations of the maximum ratings.
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation .............. " ...................•....
AVERAGE
J
:
/
2120
1/
c
3
i
II II
J
'"i
80
I
Q
.
il
~
~ .. o
f /
,I
V
/
CONNECTION
C)
/
megohm
megohm
CHARACTERISTICS
TRIODE
100
O. 1 max
O. 5 max
JAQ5-IA
ITYPE
"I
1 J
E.,=6.3 VOLTS
GRID N!2 CONNECTED
~
TO
PLATE-
",'"
/}
)'
J.';
~I
"/
j
/
V V
/ Iy /
/
/
J
:~
/ V / / .,0
.. !f~ /
{;7f-; ;z: ::;.:;- ~p ~~
-- -- ~V
o
V
...w
~
--
100
200
5
.100
400
PLATt VOLTS
500
eoo
UCM-e333 T
149
RCA Receiving Tube Manual
VERTICAL DEFLECTION AMPLIFIER (Triode ConnectionlO
For operation in a 5l!5-line, SO-frame s"stem
Moximum Rotings, (Desi(l1t-Maximum Values):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGEt .............................. .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............ .
PEAK CATHODE CURRENT ............................................ .
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode . ........................... .
BULB TEMPERATURE (At hottest point) .............................. .
275 max
1100 max
-275 max
115 max
40 max
10 max
volts
volta
volts
rna
rna
watts
200 max
200 8 max
250 max
volts
volta
·C
Maximum Circuit Value:
Grid-No.I-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . • .
2.2 max megohlll8
• Grid No.2 connected to plate.
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a 525line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
8 The de component must not exceed 100 volts.
TWIN DIODE-HIGH-MU TRIODE
Miniature type used as combined detector,
amplifier, and avc tube in compact radio receivers. Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact socket.
Heater volts (ac Idc) , 6.3; amperes, 0.15. Characteristics of triode unit as cia.. Al amplifier:
plate volts, 250 (300 max); grid volts, -3; amplification factor, 70; plate resistance (approx.),
58000 ohms; transconductance, 1200 I'mhos;
plate rna., 1; peak heater-cathode volts, 90 max. This type is used principally for renewal purposes.
6AQ6
TWIN DIODE-HIGH-MU TRIODE
Glass octal type used as FM detector and
audio amplifier in circuits which require diode
and triode units with separate cathodes. Outline 14C,OUTLINES SECTION. Tube requires
octal socket. Heater volts (ac/dc), 6.3; amperes,
0.3. Ratings and characteristics of triode unit as
cia.. Al amplifier: plate volts, 250 max; grid
volts, -2; amplification factor, 70; plate resistance (approx.), 44000 ohms; transconductance,
1600 I'mhos; plate rna., 2.3. This type is used principally for renewal purposes.
6AQ 7GT
HIGH-MU TWIN TRIODE
Miniature type used as rf amplifier and self-oscillating mixer in
FM/AM radio receivers. Outline 8B,
OUTLINES SECTION . Tube requires
PT2
IS
nine-contact socket and. may be operated in any position. Heater volts (ac/dc), 6.3; amperes, 0.435. With plate volts
of 250 and grid volts of -2.3, class Al characteristics of each unit are: plate rna, 10;
plate resistance (approx.), 9700 ohms; transconductance, 5900 I'mhos; amplification factor, 57.
6AQ8
Maximum Ratings, (Design-Cenler Value., Each Unit):
PLATE VOLTAGE with plate ma=O .................................... .
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Negative-bias value .................................. .
PLATE DISSIPATION:
For either plate ................................................ .
For both plates with both units operating .........................•
CATHODE CURRENT ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater-negative with respect to cathode ........................... .
Heater positive with respect to cathode .........................•..
150
550 max
300 max
-100 max
volts
volts
volts
2.5 max
4.5 max
15 max
watts
watts
rna
90 max
90 max
volts
volts
=========- Technical Data
Typical Operation, (Each Unit):
Plate Supply Voltage .................................. ..
Plate Voltage .......................................... .
Plate Resistor ......................................... .
Grid Resistor .......................................... .
Grid Voltage .......................................... .
RMS Oscillator Voltage ................................. .
Cathode Resistor ....................................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Conversion Transconductance . .......................... .
Input Resistance at frequency (Me) = 100 ................ .
Plate Current .......................................... .
Equivalent Noise Resistance ... .......................... .
RF
Amplifier
250
230
1800
Converter
250
12000
1
-2
3
200
9700
6000
6000
10
500
Maximum Circuit Values, (Each Unit):
Grid-Circuit Resistance . ............................................ .
Resistance between Cathode and Heater .............................. .
22000
2300
15000
5.2
1 max
20000 max
volts
volts
ohms
megohm
volts
volts
ohms
ohms
#-'mhos
J.'mhos
ohms
rna
ohms
megohm
ohms
POWER PENTODE
Miniature type used as output tube primarily in automobile receivers and ac-operated receivers. Outline 7C, OUTLINES SECTION.
Tube requires miniature seven-contact socket
and may be mounted in any position. Heater
volts (ac/dc), 6.3; amperes, 0.4. Maximum
ratings as class AI amplifier: plate and grid-N 0.2
(screen-grid) volts, 250 max; plate dissipation,
8.5 max watts; grid-No.2 input, 2.5 max watts;
peak heater-cathode volts, 90 max. Within its maximum ratings, type 6AR5 is equivalent in performance
to glass-octal type 6K6-GT. Type 6AR5 is used principally for renewal purposes.
6AR5
~~PI
SEMI REMOTE-CUTOFF
TWIN PENTODE
Duodecar type used as if-amplifier tube in television receivers. Outline 12A, OUTLINES SECTION.
Tube requires duodecar twelve-conH
H
tact-socket and may be mounted in
any position. Heater volts (ac/dc), 6.3; amperes, 0.8.
6ARll
Related type:
llARll
CLASS Al AMPLIFIER
Values for each unit
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
330 max
volts
GRID-No.3 (SUPPRESSOR-GRID) Voltage, Positive value. . . . . . . . . . . . . . . . . . .
0 max
volts
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . .
330 max
volts
GRID-No.2 VOLTAGE ....................................................... See curve page 70
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value.. . . . . . . . . . . . . . . .
0 max
volts
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.65 max
watt
For grid-No.2 voltages between 165 and 330 volts ......................... See curve page 70
PLATE DISSIPATION.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.1 max
watts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
200 max
volts
Heater positive with respect to cathode ........................... .
200 0 max
volts
Characteristics, (Each Unit):
Plate Supply Voltage. . ........................................ ......
125
volts
Grid No.3 ..................................................... Connected to cathode at socket
Grid-N 0.2 Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
volts
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
56
ohms
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.2
megohm
Transconductance................... ...................... ..........
10500
}oImhos
Plate Current.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11
rna
Grid-No.2 Current. .................................................
3.5
rna
Grid-No.1 Voltage (Approx.) for transconductance of 50 }oImhos ... ,. ......
-15
volts
o The de component must not exceed 100 volts.
151
RCA Receiving Tube Manual
BEAM POWER TUBE
6AS5
Miniature type used as output
amplifier primarily in automobile and
in ac-operated receivers. Outline 7C,
OUTLINES SECTION. Tube requires miniature seven-contact socket
and may be mounted in any position.
For curves of average plate characteristics, refer to type 35C5.
HEATER VOLTAGE (AC/DC) .••••.••••••••••••••••••••••.•••••••••••••••
HEATER CURRENT .................................................. ..
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................... ..
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 .•....•...•..••
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ..••...•...•...•...
6.8
0.8
volts
ampere
0.6
12
9.0
pf
pf
pf
CLASS AI AMPLIFIER
Mal(imum Ratings, (Desifl1l-Center Values):
PLATE VOLTAGE .................................................... ..
GRID-No.2 (SCREEN-GRID) VOLTAGE ••............••..•......••••.••••.•.
PLATE DISSIPATION ...•••.•....•...•.............•.•..•.•...•••....•••
GRID-No.2 INPUT ................................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .............................. .
Heater positive with respect to cathode .............................. .
BULB TEMPERATURE (At hottest point) ................................. .
Typical Operation:
Plate V-o\tage ...................................................... ..
Grid-No.2 Voltage ................................................... .
Grid-No.1 (Control-Grid) Voltage .•••..•.. '" ......................... .
Peak AF Grid-No.1 Voltage ........................................" .. .
Zero-Signal Plate Current .....•••..•••...••..•.••••.•••••••••••••••••••
Maximum-Signal Plate Current ....................................... ..
Zero-Signal Grid-No.2 Current (Approx.) •...••....•....•••....•••••.•••.
Maximum-Signal Grid-No.2 Current (Approx.) .•••.....••....•••.•.•••••.
Transconductance ................................................... .
Load Resistance ..................................................... .
Total Harmonic Distortion .••...••..•...•...•••••.•••.•.••.....••••.•.•
Maximum-Signal Power Output ...................................... ..
Mal(lmum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................................ .
For cathode-bias operation ........................................ ..
160 mtUO
117mtUO
6.6 mtUO
1.0mtUO
volts
volts
watts
watt
100 mtUO
100 mtUO
260 mtUO
volts
volts
·C
160
110
-8.6
8.6
86
86
2
6.6
6600
4600
10
2.2
volts
volts
volts
volts
naa
ma
ma
ma
"mhos
ohms
per cent
watts
0.1 mtUO
0.6 mtUO
megohm
megohm
DIODESHARP-CUTOFF PENTODE
Miniature type used in diversified
applications in television and radio reRelated type:
ceivers. The pentode unit is used as an
SASB
if amplifier, video amplifier, or agc
Pp
amplifier. The high-perveance diode is
used as an audio detector, video detector, or dc restorer. Outline 8B, OUTLINES
SECTION. Tube requires miniature nine-contact socket and may be mounted in
any position.
6AS8
HEATER VOLTAGE (AC/DC) .......................................... ..
g:it~m: I~=~kRODE 'CAPAciTANCEii:' ............................. .
Diode Unit:
Plate to Cathode, Heater, Pentode Grid No.3, and Internal Shield
Pentode Unit:
Grid No.1 to Plate .....•.........................................
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ... .
Pentode Grid No.1 to Diode Plate ................................... ..
p!>ntode Plate to Diode Cathode ..................................... .
Pimtode Plate to Diode Plate ••.••••.•...•...••••.•••.•••.•.•••.•.•.••
152
6.8
0.46
volts
ampere
8.0
pC
0.08 mtUO
7
2.4
0.005 mtUO
0.16
m/UO
0.10 mtUO
pC
pC
pC
pf
pf
pf
----------------- Technical Data ----------------PENTODE UNIT AS CLASS AI AMPLifiER
Maximum Ratings, (DflIIign-Cenler Values):
PLATE VOLTAGE .....•...•.•.....................•...................
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value ................. .
GRID-No.2 SUPPLY VOLTAGE ......•..•..............•....•...•.......•
GRID-No.2 (SCREEN-GRID) VOLTAGE .....................•••...•...•.•.
GRID-No.1 (CONTROL-GRID) VOl--TAGE, Positive bias value ................ .
PLATE DISSiPATION •.•.•.••••.•.•.••.....•..•.....•.................•
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ••••.•....•....•...... , .••.•.•
For grid-No.2 voltages between 150 and 300 volts ••••.•..............
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
300""""
volts
volts
volts
See curve page 70
o max
volt.
2.5""""
wattr
o max
300 max
0.5 ma:lO
watt
See curve page 70
volta
volts
200 max
2000""""
Characteristics:
Plate Supply Voltage................................................
200
volts
Connected to cathode at locket
Grid No.3 and Internal Shield................................
Grid-No.2 Supply Voltage............................................
150
volta
Cathode-Bias Resistor. • . . • .. . .. .. . . .. . .. . .. . .. . . • . .. .. . . .. . .. • .. . .. .
180
ohms
Plate Resistance (Appros.). • • • • • . .. .. .. .. . . . .. • . • . • .. . . . . .. . . .. . .. . .• 300000
ohm.
Transconductance. • • .. .. .. .. . .. . .. . .. . . . • . . • .. .. .. .. . .. . .. . .. . .. .. . .
6200
"mhea
Grid-No.1 Voltage (Approx.) for plate current of 10 "a.. •. •. . ••• . •• •• •. .•
-8
voila
Plate Current.......................................................
9.5
...
Grid-No.2 Current...................................................
3
rna
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias operation .•••.•..............•..•.....•.••..•..•..••
For cathode-bias operation ...................................... ..
• The de component must not exceed 100 volts.
0.25 max
1.0""""
melohm
megohm
330 max
volts
50 """"
5 """"
200 max
200·""""
volts
volts
DIODE UNIT
Maximum Ratings, (DflIIign-Cenler Valuea):
PEAK INVERSE PLATE VOLTAGE •••••••.•••.•.•..••••••.••..••••.•.••.•
PEAK PLATE CURRENT .•••••••••••••••••••••••....•..•..•..•..•..••.•
DC PLATE CURRENT ............................................... ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
o The dc component must not exceed 100 volts.
Grl
~2
7
!'r,
e
Kp
G3p
ma
ma
DUAL TRIODESHARP-CUTOFF PENTODE
9 IS
Duodecar type used in television
receivers. High-mu triode is used in
audio if-amplifier service; mediummu triode is used in sync-separator
H
service; pentode is used in video amplifier service. Outline 12B, OUTLINES SECTION. Tube requires 12-contact socket and may be mounted in any position. Heater voltage (ac/ dc), 6.3; amperes, 1.05.
6ASll
CLASS At AMPLIfiER
Maximum Ratings, (Deaif/fl-Maximum Value.):
PLATE VOLTAGE ................................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .... , ... .
GRID-No.2 VOLTAGE ............................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE,
Positive-bias value .......................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ......... .
For grid-No.2 voltages between 165 and a30 volts
PLATE DiSSIPATION .............................. .
PEAK HEATER-CATHODE VOLT.(GE:
Heater negative with respect to cathode ........ .
Heater positive with respect to cathode ........ .
Triode Unita
No.1 No.S
830"""" 330 max
o max
1.5 ma:lO
0 max
2 max
Penrod.
Unit
aao ma:lO
volts
volts
See curve page 70
330 max
o max
volts
1.1 max
watts
See curve page 70
5 """"
watts
200 """" 200 max
200°"""" 200°""""
200 max
200°""""
volts
volts
200
200
125
68
volts
volts
volts
ohms
70000
ohms
Characteristics:
Plate Supply Voltage ..•..........................
Grid-No.2 Supply Voltage ........................ .
Grid Voltage .................................... .
Cathode-Bias Resistor ........................... .
Amplification Factor ............................. .
Plate Resistance (Appros.) ....................... .
200
-2
68
12400
220
41
9400
153
RCA Receiving Tube Mantlal
Transconductance ..........................•.•...
Plate Current ................................... .
Grid-No.2 Current ..•............................
Grid-No.1 Voltage (Approx.):
For plate current of 10 I'a .................... .
For plate current of 100 I'a ................... .
5500
7
-5.5
4400
9.2
10500
24
5.2
I'mhos
rna
rna
-6.5
-8
volts
volts
Maximum Circuit Values, (Each Unit):
Grid-No.l-Cireuit Resistance:
For fixed-bias operation ...................... .
For cathode-bias operation ................... .
• The dc component must not exceed 100 volts.
0.5 max 0.5 max
1 max 1 max
0.25 max megohm
1 max megohm
TWIN DIODE-HIGH-MU TRIODE
Miniature type used as a combined detector, amplifier, and avc tube
Related type.
in automobile and ac-operated radio
12AT6
receivers. Outline 7B, OUTLINES
SECTION. Tube requires miniature
seven-contact socket and may be mounted in any position. For typical operation as
resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER
SECTION.
6 A T6
HEATER VOLTAGE (AC/OO) ..•...•.........•..••••...........••.••....•
HEATER CURRENT ••....................•.....•..........•••.........
DIRECT INTERELECTRODE CAPACITANCES:
Triode Grid to Triode Plate ...................................... .
Triode Grid to Cathode and Heater ................................ .
Triode Plate to Cathode and Heater ............................... .
Plate of Diode Unit No.2 to Triode Grid ........................... .
6.3
0.3
volts
ampere
2.0
2.2
0.8
0.04 max
pI
pf
pf
pI
300 max
0.5 max
o max
volts
watt
vDlts
90 max
90 max
volts
volts
TRIODE UNIT AS CLASS AI AMPLIFIER
Maximum Ratings, (Deaign-Center Values):
PI,ATE VOLTAGE ...•......•.............•..........•.....•••••••••••.
PLATE DISSIPATION ...•...•••••......•.••....•.......•.•.•• " ••••.•.•
GRID VOLTAGE. Positive-bias value .••••••.•...•.•.•.•••••.........•.•
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...•.•••••.•••.•.•....•..•.•.
Heater positive with respect to cathode .••••...•••......•....•.••...
Characteristics.
Plate Voltage .••.•••••.•.•.•••••••••••••••.•..•..•.•...•
Grid Voltage ......................................... ..
Amplification Factor .................................... .
Plate Resistance ....................................... .
Transconductance ..•••..•..•..•.••.•.•..................
Plate Current •..•...••.•......•.•..••..•••.•.••.••....••
100
-1
70
54000
1300
0.8
250
-8
70
58000
1200
1.0
volt.
volts
ohms
I-\mhos
ma
DIODE UNITS
Maximum Rating, (Deaign-Center Value):
PLATE CURRENT (Each Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l. 0 max
rna
The two diode plates are placed around a cathode. the sleeve of which is cOlDmQn to the triode unit.
Each diode plate has its own base pin. For diode Qperation curves. refer to type 6A V6.
MEDIUM-MU TRIODESHARP-CUTOFF
PENTODE
6AT8
Miniature types used as combined
oscillator and mixer tubes in television
Related type.
receivers utilizing an intermediate freSATa
quency in the order of 40 megacycles
I
per second. Type 6AT8-A has a conGT
Glp
trolled heater warm-up time for 1,lSe in receivers employing series-connected heater
strings. Outline 8B,OUTLINESSECTION. Except for interelectrode capacitances
and basing arrangement, thes¢ types are identical with miniature type 6X8. The
basing arrangement Of the 6AT8 and 6AT8-A is particularly suitable for connection
to the coils of certain designs of turret tuners. Type 6AT8 is a DISCONTINUED
type listed for reference only.
6AT8A
HEATER VOLTAGE (AC/OO) ..•.•.•.•••••••.•.•••••••••.•.•.•.••....•.••
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (Average) for 6AT8-A •.••••.•.•••••.••••••••••
154
6.3
0.45
11
volts
ampere
aeconds
Wilhoul
Ez"".al
DIRECT INTBRELECTRODE CAPACITANCIIi8:
Triode Unit:
Grid to Plate ............••.......•.....•.•••••.•.•..•
Grid to Cathode and Heater ............•.•.....••••••••
Plate to Cathode and Heater ••••••.••.•••....••.•••••..
Pentode Unit:
Grid No.1 to Plate .....•....................•..•••.•••
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.S .••••
Plate to Cathode, Heater, Grid No.2, and Grid No.S ...••.•
Pentode Grid No.1 to Triode Plate .........•...•.....•.....
Pentode Plate to Triode Plate •.............•.••.•..•.......
Heater to Cathode .....••.•.......•.••..•.•.•...•.......•
- With external .hield connected to cathode except a. noted.
t With external shield eonneeted to plate.
~
Wilh
Ezl.".al
Shi.1d
1.5
2.0
0.5
0.06mGllJ
4.6
0.9
0.05mGllJ
0.05 mGllJ
6.0
Sh,ield1 5
2.4
1.0
pf
pi
pf
0.03mGllJ
4.8
1.6
0.04 mGllJ
0.008 mGllJ
6.0t
pf
pf
pf
pf
pf
pf
p
Ka
HALF-WAVE VACUUM RECTIFIER
Glass octal types used as damper
6AU4GT
tubes
in horizontal-deflection circuits
2
1
of
color
television
receivers
and
of
teleIe;
"
I
8
vision receivers utilizing picture tubes
I
"
having wide-angle deflection. Outline,
14F, OUTLINES SECTION. Tubes require octal socket and may be mounted in
any position. These types may be supplied with pin No.1 omitted. Socket terminals
1, 2, 4, and 6 should not be used as tie points. It is especially important that these
tubes, like other power-handling tubes, be adequately ventilated. Type 6AU4-GT
is a DISCONTINUED type listed for reference only.
6AU4GTA
HEATER VOLTAGE (AC/OO) •.......•.••••••••••••••...• , •.•••••••.•...•
HEATER CUBRENT .•....•..........•••..•••••••....•.••••...•......••
DIRECT INTERELBCTRODE CAPACITANCIIi8 (Approx.):
Plate to Heater and Cathode .......••..••..•••.•••.•••••••.•.•.•..
Cathode to Heater and Plate ....••....••••.•.•.•.•.••.•••••.•••...
Heater to Cathode .•.••••....•...•..••••••...•••••••••••.••••..••
6.S
1.8
volte
ampereo
8.5
11.5
4.0
pf
pf
pf
DAMPER SERVICE
For operalion in
Il
5115-lin" 3D-frame
",Ikm
6AU4-GT
6AU4·GTA
Deaign-Cenler Design-MGlIJimum
Maximum Ratings:
Val..,s.
Value.
PEAK INVERSE PLATE VOLTAGEt .•.•.•......•......••••••..•
45000 mGllJ 4500 mGllJ
volta
PEAK PLATE CUBRENT .•.••••.•••.•...........•••...•...•..•
1050 mGllJ 1300 mGllJ
rna
DC PLATE CURRENT ...•....••...•.....•...........•.....•••
175 mIllIJ
210 mGllJ
ma
6 mIllIJ
6.5 mGllJ
PLATE DISSIPATION ....................•.•.................•
watts
PEAK HEATER-CATHODE VOLTAGE:
volts
Heater negative with reopact to eathode .••...•...•,. . • • . . . . • 45000*mGllJ 4500* mGllJ
volts
Heater positive with reopect to cathode ••• • • . • • • . • • • • • . • . • . 300# mGllJ
SOO# mGllJ
, Except as noted.
T The duration of the voltage puloe mOlt not exceed 15 per cent of one horizontal seanning cycle. In a
525-line, 3D-frame system, 15 per cent of one horizontal scanning eyele is 10 mieroseeonds.
° Abaolu" MGlIJimum. Under no eircumstances should this absolute value be exceeded•
• The de component mOlt not exceed 900 volte.
, The de component mOlt not exceed 100 volts.
:3*:::~P
BEAM POWER TUBE
Glass octal type used as horizontal deflection amplifier inlow-cost, high"2
1 H
efficiency deflection circuits of television receivers employing either transI
8
GI
Ga
former coupling or direct coupling to
the deflecting yoke. Outline 14C, OUTLINES SECTION. Tube requires octal
socket and may be mounted in any position.
HEATER VOLTAGE (AC/OO) ••••••••••••••.•.• , •••. •••• .••••• ••.•••• •. •• •
HEATER CURRENT....................................................
DIRECT INTERELlilCTRODE CAPACITANel!lll (Approx.):
Grid No.1 to Plate ••••••...•.....•.•.••••••.•.•..•.•...•.•••••••..
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 •.•••...•...•.
Plate to Cathode, Heater, Grid No.2, and Grid No.3 .••.••••..•..•..••
TRANeCONDUCTANCE# ................................................ .
Mu-FACTOR, Grid No.2 to Grid No.1 t ................................. .
# For plate volts, 115; grid-No.2 Yolts, 175; grid-No.1 Yolts, -20.
t For plate Yolts, 100; grid-No.2 Yolts, 100; grid-No.1 volts, -4.5.
6AUSGT
6.3
1.25
volts
ampereo
0.5
11.3
7.0
5600
5.9
pf
pf
pf
"mhos
155
RCA Receiving Tube Manual
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 5145-line. SO-frame B/lBtem
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ................................................ ..
PEAK POSITIVE-PULSE PLATE VOLTAGE* (AbBolute Maximum) ..... " ..... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ...•.. " . " . " ................. .
DC GRID-No.2 (BCREEN-GRID) VOLTAGE· ......•........................
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............ .
PEAK CATHODE CURRENT ...................................•.........
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT ...............................•..................
PLATE DISSIPATIONtt ...............................•................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode .••...•......................
BULB TEMPERATURE (At hottest point) .....................•••........•
550 max
55000 max
-1250 max
200 max
-300 max
400 max
110 max
2.5 max
lOmax
volts
volts
volts
volts
volts
ma
ma
watt.
watts
200 max
volts
volts
200~ax
·C
210 max
Maximum Circuit Value:
Grid-No.1-Circuit Resistance... . ............•...............••.•.•..•
0.47 max megohm
The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line. 30-frame system. 15 per cent of one horizontal scanning cycle is 10 microseconds.
° Under no circumstances should this absolute value be exceeded.
• Obtained through a series dropping resistor of sufficient magoitude to limit the grid-No.2 input to the
rated maximum value.
ttAn adequate bias resistor or other means is required to protect the tube in the absence of excitation.
- The de component must not exceed 100 volts.
*
6AU6
SHARP-CUTOFF PENTODE
~
H4
H
:
Gz
3
G
6.3
0.3
11
volts
ampere
seconds
Miniature types used in compact
radio equipment as rf amplifier espe2
7
cially in high-frequency, wide-band apG3
K
Related typel:
IS
3AU6.4AU6.12AU6
plications; also used as limiter tube in
I
FM equipment. Type 6AU6-A has a
GI
controlled heater warm-up time for use in applications employing series-connected
heater strings. Outline 7B, OUTLINES SECTION. Tubes require miniature sevencontact socket and may be operated in any position. For a discussion of limiters,
refer to ELECTRON TUBE APPLICATIONS SECTION. For typical operation as resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION. Type 6AU6 is a DISCONTINUED type listed for reference only.
6AU6A
HEATER VOLTAGE (AC/OO) ............•...•.....•••••.........••......
HEATER CURRENT ..........••...•.•.....•..•..•••••.....••.••••. " .•
HEATER WARM-UP TIME (Average) for 6A U6-A . ...................... .
DIRECT INTERELECTRODE CAPACITANCES:
Pentode Connection:
Grid No.1 to Plate ................................•
Grid No.1 to Cathode. Heater. Grid No.2. Grid No.3.
and Internal Shield ...............................•
Plate to Cathode. Heater. Grid No.2. Grid No.3. and
Internal Shield .................................. .
Triode Connection:t
Grid No.1 to Plate. Grid No.2. Grid No.3. and
Internal Shield .................................. .
Grid No.1 to Cathode and Heater .............. " .... .
Plate. Grid No.2. Grid No.3. and Internal Shield to
Cathode and Heater .............................. .
- With external shield connected to cathode.
t Grid No.2. grid No.3. lind internal shield connected to plate.
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .......................... " •••.•.....••.
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE. Positive value ..... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ...•....................
GRID-No.2 SUPPLY VOLTAGE ........................•.....
PLATE DISSIPATION ...••....•.•.........................•
156
With
Without
External
External
ShieldShield
0.0035 max 0.0035 max
pf
5.5
5.5
pf
5.0
5.0
pf
2.6
3.2
2.6
3.2
pf
1.2
8.5
pf
Triodet
Connection
275 max
3.5 max
pf
Pentode
Connection
3aO max
vol ts
volts
See curve page 70
330 max
volts
3.5 max
watts
o max
=========- Technical Data =========GRID-No.2 INPUT:
0.75 max
watt
See curve page 70
For grid-No.2 voltages up to 165 volts ................. .
For grid-No.2 ¥QUaKes between 165 and 330 volt•........
GRID-No.1 (CONTROL-GRID) VOLTAGE:
o max
o max
volts
200 max
200 A max
200 max
200 A max
vol ts
volts
Positive-bias value .................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ................•
Heater positive with respect to cathode ................ .
Triodet
Connection
Plate Supply Voltage ...••....................
250
Grid No.3 ................................. .
Grid-No.2 Supply Voltage .................... .
Cathode-Bias Resistor ....................... .
330
Amplification Factor ......................... .
36
Plate Resistance (Approx.) ................... .
Transconductance ........................... .
4800
Grid-No.1 Voltage for plate current of 10 I'a •.....
Plate Current ............................... .
12.2
Grid-No.2 Current .•..•................. , ..•
t Grid No.2, grid No.3, and internal shield connected to plate.
A The de component must not exceed 100 volts.
Characteristics:
Penlode Connection
100
250
250
volts
Connected to cathode at socket
100
125
150
volts
150
100
68
ohms
0.5
3900
-4.2
5.0
2.1
1.5
4500
-5.6
7.6
3.0
1.0
6200
-6.6
10.6
4.3
megohms
I'mhos
volts
rna
rna
AVERAGE CHARACTERISTICS
l.1
TYP[ 6AU6
Ef = 6.3 VOLTS
GRID Nt 3. A'NO INTERNAL. SHIELD
CONNECTED TO CATHODE AT SOCKET.
GRIO-Nt2 VOLTS =100
2
[CI=O
tb
• /'
f-"'
-0.&
r
4
).c
r
GRIO-NI I VOLTS Eel
~_ _ICL_
="1.0
[CI=O
"I.~
-2.0
lb
-2.&
o
100
200
300
400
PLAT[ VOLTS
-
$00
600
92CIA-66I1TI
MEDIUM-MU TWIN TRIODE
Miniature type used as phase inverter or
amplifier in television',receivers employing seriesconnected heater .·trings. Outline 8B, OUTLINES SECTION. Heater volts (ae/de), 6.3
(series), 3.15 (parallel); amperes, 0.3 (series),
0.6 (parallel); warm-up time (average) in parallel arrangement, 11 seconds. Except for heater
and heater-cathode ratings, this type is identical
with miniature type 12AU7. The 6AU7 is a
DISCONTINUED type listed for reference only.
6AU7
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
6AU8
Miniature types used in television
receiver applications. Tubes have controlled heater warm-up time for use in
Related Iype:
8AU8
series-heater strings. Pentode unit is
used as video amplifier, if amplifier,
agc amplifier. Triode unit is used in sync-amplifier, sync-separator, sync-clipper,
and phase-inverter circuits. Outline 8D, OUTLINES SECTION. Tubes require
nine-contact socket and may be mounted in any position. Type 6AU8 is a DISCONTINUED type listed for reference only.
6AU8A
157
RCA Receiving Tube Manual
HEATER VOLTAGE (AC/DC) ..•.•.................•.•.•.•.....•...•.....
HEATER CURRENT ......................•..........•........•.......
HEATER WARM-UP TIME (Average) ..•..•.......•.........•.......•...•
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate ................................•............•......
Grid to Cathode and Heater .•....................................•
Plate to Cathode and Heater ...•.............•....................
Pentode Unit:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ....
Triode Grid to Pentode Plate ..........................•.•............
Pentode Grid No.1 to Triode Plate ..........•................••.......
Pentode Plate.to Triode Plate ....................................... .
Maximum Ratings, (Design-Ma.>:imum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE ... : ................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ..................................... .
GRID-No.2 INPUT
For grid-No.2 voltages up to 165 volts ................ .
For grid-No.2 voltages between 165 and 330 volts ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid-No.1 Voltage (Approx.) for plate current of 100 "a .... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
o ma.>:
volts
ampere
seconds
2.2
2.6
0.34
pf
pf
pf
0.06
7.5
3.4
0.022 ma.>:
0.006 max
0.12 ma.>:
Triode Unit
330 ma.>:
2.8 max
6.3
0.6
11
pf
pf
pf
pf
pf
pf
Pentade Unit
330 max
volts
330 max
volts
See curve page 70
0 max
volts
3.3 max
watts
1 ma.>:
watt
See curve page 70
volts
volts
Triode Unit P.ntad. Unit
150
200
125
150
82
43
8100
100000
5300
8000
-6.5
-7.5
9.5
17
volts
volts
'ohms
ohms
,.,.mhos
volts
rna
rna
3.4
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
• The de component must not exceed 100 volts.
6AVSGA
0.5 max
1.0 max
Gl~!Ao':a~~y~!Ru:e~B~s
0.25 ma.>: megohm
1. 0 max megohm
~3~
hori___ 5 P
zontal deflection amplifiers in teleVISIOn receivers employing either
H 2
7 H
Related type..
12AV5GA, 25AV5GA
transformer coupling or direct coupling to the deflecting yoke. 6AV5-GA
Gil
e G2
Outline 19B, 6AV5-GT Outline 14C, OUTLINES SECTION. Tubes require octal
socket and may be mounted in any position. Type 6AV5-GT is a DISCONTINUED
type listed for reference only.
6AV5GT
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT ................................................. ~.
TRANSCONDUCTANCE* ............................................... .
Mu FACTOR, Grid No.2 to Grid No.1 ••..•.•....................•.....•
* Plate volts, 250; grid-No.2 volts, 150; grid-No.1 volts, -22.5.
Triode connected; plate and grid-No.2 volts, 150; grid-No.1 volts, -22.5.
6.3
1.2
5900
4.3
volts
amperes
"mhos
**
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a US-line, 30-/rame 8y"tem
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ................................................. .
PEAK POSITIVE-PULSE PLATE VOLTAGEt (Absolute Ma.>:imum) ..•.....•...•
PEAK NEGATIVE-PULSE PLATEVOLTA(}E •......•.....•..•..... ; .••......
DC GRID-No.2 (SCREEN-GRID).VOLTAGE .............................. ..
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE .••••••.••.•.
158
550 ma.>:
5500"ma.>:
-1250 ma.>:
175 maz
-300 maz
volts
volts
volts
volts
volta
=;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Technical Data
=;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
PEAK CATHODE CURRENT ............................................•
AVERAGE CATHODE CURRENT .................•.......................
GRID-No.2 INPUT ................................................. ..
PLATE DISSIPATIONtt ..•....... " ............... , . " ........ '" ..... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... ..
Heater positive with respect to cathode ............................ .
BULB TEMPERATURE (At hottest point) ..........................•....•
400 max
110 max
2.5 max
11 max
ma
ma
watts
watts
200 max
200-max
210 max
volts
volts
°c
Maximum Circuit Value:
0.47 max megohm
Grid-No.1 Circuit Resistance ..••••...................................
t The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
° Under no circumstances should this absolute value be exceeded.
tt An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
- The de component must not exceed 100 volts.
TWIN DIODE-HIGH-MU TRIODE
Miniature type used as combined
detector, amplifier, and avc tube in
automobile and ac-operated radio receivers. The 6AV6 may be substituted
GT
directly for the 6AT6 in applications
where the higher amplification of the 6AV6 is advantageous.
HEATER VOLTAGE (AC/DC) .•.•••••...•..•..........•.•...... " •.••.•••.
HmATER CURRENT ••••••••........•..•....•..•...•......•...••........
Without
External
DIRECT INTERELECTRODE CAPACITANCES:
Shield
2.0
Triode Grid to Triode Plate ........................ .
Triode Grid to Cathode and Heater ................. .
2.2
Triode Plate to Cathode and Heater ................. .
0.8
Plate of Diode Unit No.2 to Triode Grid ........ " .... .
0.04 max
- With external shield connected to cathode.
6AV6
Related types:
3AV6, 4AV6, 12AV6
6.3
volts
ampere
1.2
0.04 max
pf
pf
pf
pC
330 max
o max
0.55 max
volts
volt.
watt
200 max
200·max
volts
volts
0.3
With
External
Shield2.0
2.2
TRIODE UNIT AS CLASS AI AMPLIFIER
Maximum Rating, (Design-Maximum Value):
PLATE VOLTAGE .. : .................................................. .
GRID VOLTAGE, Positive-bias value .................................... .
PLATE DISSIPATION ...••..........•••..•••.................•...•......
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..•..•....••......... '" ..•...•
Heater positive with respect to cathode .............................. .
Characteristics:
Plate Voltage •.••.••••..•...•.......•. " . . . . . . . . . . . . . • • . . . •
Grid Voltage. ..............................................
Amplification Factor........................................
100
-1
100
250
-2
100
volts
volts
AVERAGE PLATE CHARACTERISTICS
TRIODE UNIT
4
1{-1
E.r= 6.3VOLTS
flj l!
3
2
TYPE 6AV6
V / / / ?J
III /
:;
v V / / 11r;-~
J
'/1// / / / / /
o
,,,'?
:7.~
VVV~ ~~0~~
'00
00
300
400
PLATE VOLTS
500
92C~-"7'T
159
RCA Receiving Tube Manual
80000
1250
0.50
Plate Resistance .................•...........•..............
Transconductance ........•..................................
Plate Current ...............•..............................
62500
1600
1.2
ohms
"mhos
ma
DIODE UNITS
Maximum Rating, (Design-Maximum Value):
PLATE CURRENT (Each Unit). . • . . . . . . . . . . • . • • . . . • . . . . . • • . . .. . . • . . . . . . . .
1. 0 max
rna
• The dc component must not exceed 100 volts.
The two diode plates are placed around a cathode, the sleeve 01 which is common to the triode
unit. Each diode plate has its own base pin. Diode biasing 01 the triode unit is not recommended.
AVERAGE DIODE CHARACTERISTICS
HALF-WAVE R[CTIFICA110N-SINGLE DIODE UNIT
INSTALLATION AND APPLICATION
Type 6AV6 requires miniature sevencontact socket and may be mounted in any
position.Outline7B,OUTLINESSECTION.
The triode unit of the 6AV6 is recommended for use only in resistance-coupled
circuits. Refer to the RESISTANCE-COUPLED AMPLIFIER SECTION for typical
operating conditions.
Grid bias for the triode unit of the
6AV6 may be obtained from a fixed source,
such as a fixed-voltage tap on the dc power
supply, or from a cathode-bias resistor. It
should not be obtained by the diode-biasing
method because of the probability of platecurrent cutoff, even with relatively small signal voltages applied to the diode circuit.
TYPE 6AV6
E.p=6.3 VOLTS
1\
'"
0
N
~
~
.I
~o
I20
~
o
80:E
:;]
\
I":
f - - -"'
- ~"'
r-...
I
(g
T r- ~
_40
-30
/
a:
u
N
;;:
60 i=
u
~
f-
:!l
I00"
<:
§?
~ ~\
9sI; ,-_1-
f - f - ~~
I40
\
\
- - -':r 9t'! I.C
0:
""4~.0
I
o
o.~
1.0
I.S
GRID-N'I MILLIAMPERES (ICI)
$!CM-1I1I2~T
8
o
0.4
0.8
1.2
GRID-N'I MILLIAMPERES (lCI)
92CM-8824T
BEAM POWER TUBE
Miniature type used in audio output stage
of television and radio receivers. Triode-connooted, it is used as a vertical deflection amplifier in television receivers. Outline 7C, OUTLINES SECTION. Tube requires miniature
seven-contact socket and may be mounted in
any position. Heater volts (ac/dc), 6.3; amGI
peres, 1.2. Typical operation as class Al amplifier: plate volts, 110 (260 max); grid-No.2 volts,
110 (117 max); grid-No.1 volts, -7.6; peak af grid-No.1 volts 7.6; plate dissipation, 5.5 max watts;
grid-No.2 input, 1.26 max watts; plate ma., 36 (zero-signal), ~9 (maximum....ignal); grid-No.2 rna., 4
(zero-aignal), 10_5 (maximum-aignal); plate resistance (approL), 12000 ohms; transconductance, 7600
,.mho.; plate load resistance, 2600 ohms,total harmonic distortion; 10 per cent; maximum-signal power
output, 1.9 watts; peak heater-cathode volts, 200 max (dc component 100 max when heater is positive
with respect to cathode). This type is used principally for renewal purposes.
6BF5
TWIN DIODEMEDIUM-MU TRIODE
6BF6
R.I..... type:
128F6
176
Miniature type used in compact
radio equipment as combined detector,
amplifier, and avc tube. The triode
unit is particularly useful as a driver
for impedance- or transformer-coupled
------------------- Technical Data ------------------output stages in automobile receivers. It is equivalent in performance to metal
type 6SR7. Outline 7B, OUTLINES SECTION. Tube requires miniature sevencontact socket and may be mounted in any position.
HEATER VOLTAGE (AC/DC) ................... " ............•..........
HEATER CURRENT .•.................................................
Without
E",t.,.nal
DIRECT INTERELECTRODE CAPACITANCES:
Triode Grid to Triode Plate ........................ .
Triode Grid to Cathode and Heater .................. .
Triode Plate to Cathode and Heater ................. .
Plate of Diode Unit No.1 to Triode Grid ............. .
Plate of Diode Unit No.2 to Triode Grid .............•
- With external shield connected to catbode.
Shield
1.9
1.8
0.7
0.07 mao;
0.06 mao;
TRIODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ...... " .......... " .... " ...................... " .. ,
PlATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative witb respect to cathode ............................ .
Heater positive with respect to cathode .......... " ....... " ....... .
6.3
0.3
With
E",lernal
Shield1.9
1.9
1.2
0.06 mao;
0.05 mao;
volts
ampere
300 mao;
2.5 mao;
volts
watts
90 men
90 max
volts
volts
pf
pf
pf
pf
pf
Typical Operation:
Plate Voltage ....................•......•.......... " .....•........•
250
volts
Grid Voltage .......•...............................................
-9
volts
Amplification Factor ................................................ .
16
ohm.
Plate Resistance (Approx.) ........................................... .
8500
Transconductance . ................................................. .
1900
/Amho.
Plate Current ..........................•...............•.......•....
9.5
rna
Load Resistance ...................................•................
10000
ohm.
Total Harmonic Distortion ......................................... ..
6.5
per cent
Power Output ..•...•.•........................•...........•........
300
mw
Maximum Rating:
DIODE UNITS
PLATE CURRENT (Each Unit) ................. " . . . . . . . . . . . . . . . . . . . . . . . . . .
1.0 ma",
ma
The two diode plates and the triode unit have a common cathode. Diode bia.ing of the triode unit
of the 6BF6 is not suitable. For diode operation curves, refer to type 6AV6.
BEAM POWER TUBE
6BG6G
6BG6GA
Glass octal types used as output
amplifier in horizontal-deflection circuits of television equipment and other
Related type:
I9BG6GA
applications where high pulse voltages
G2
occur during short duty cycles. Type
6BG6-GA, Outline 25A, OUTLINES SECTION. Type 6BG6-G maximum dimensions: over-all length, 5-11/16 inches; seated height, 5-1/8 inches; diameter, 2-1/16
inches. Tubes require octal socket. They may be supplied with pins 4 and 6 or with
pins I, 4, and 6 omitted. Vertical tube mounting is preferred but horizontal operation is permissible if pins No.2 and 7 are in vertical plane. Type 6BG6-G is used
principally for renewal purposes.
HEATER VOLTAGE (AC/DC) ............ " ............................. .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
68G6-G
Grid No.1 to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.34
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3. .
12
Plate to Cathode, Heater, Grid No.2, and Grid No.3. . . . . .
6.5
TRANSCONDUCTANCEo . . . . . . . . . . . . . . . • . • . . • . . . . • • • . . • . . . • • • • • . . • . • . . • • •
Mu-FACTOR, Grid No.2 to Grid No.1° ................................ .
°For plate and grid-No.2 volts, 250; grid-No.1 volts, -15.
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 5115-line, 30-frame system
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE* (Absolute Maximum) . ........... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ...............................•
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ................................ .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ........... .
PEAK CATHODE CURRENT ............................................ .
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATIONtt ............................................... .
GRID-No.2 INPUT .................................................. .
6.3
0.9
68G6-GA
0.8
11
6
6000
8.0
700 max
6600· mao;
-1500 ma",
350 ma",
-300 mao;
400 max
110 max
20 max
3.2 ma",
volt.
ampere
pf
pf
pf
/Amho.
volts
volts
volts
volts
volts
rna
rna
watt.
watt.
177
RCA Receiving Tube Manual
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
BULB TEMPERATURE (At hottest point) ............................... .
200 max
200-max
210 max
volts
volts
·C
Maximum Circuit Value.
Grid-N o.l-Circuit Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 . 47 max megohm
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds .
• Under no circumstances should this absolute value be exceeded.
tt An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
_ The dc component must not exceed 100 volts.
H
HALF-WAVE VACUUM RECTIFIER
N ovar type used as damper tube
in horizontal deflection circuits of blackand-white television receivers. Outline
Related types:
17A, OUTLINES SECTION. Tube re17BH3, 22BH3
quires novar socket and may be operK
ated in any position. Socket terminals 1, 3, 6, and 8 should not be used as tie
points. It is especially important that this tube, like other power-handling tubes,
be adequately ventilated.
6BH3
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Plate to Cathode and Heater .................................... .
Cathode to Plate and Heater .................................... .
Heater to Cathode ............................................. .
6.S
1.6
volts
amperes
6.5
9.0
2.8
pf
pf
pf
DAMPER SERVICE
. For operation in a 525-line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE- ..................................... .
5500 max
volts
PEAK PLATE CURRENT .............................................. .
1100 max
rna
DC PLATE CURRENT ................................................ .
180 max
rna
PLATE DISSIPATION ................................................. .
6.5 max
watts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
5500·max
volts
Heater positive with respect to cathode ........................... .
300 0 max
volts
- The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 900 volts.
° The de component must not exceed 100 volts.
SHARP-CUTOFF PENTODE
~4
~p
Miniature type used as rf ampliH 3
___
6 G2
fier particularly in ac/dc receivers and
in mobile equipment where low heaterK 2
7 G3
current drain is important. It is parIS
ticularly useful in high-frequency,
G/
wide-band applications. Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contact socket and may be mounted in any position.
6BH6
HEATER VOLTAGE (AC/DC). .... ........................................
6.3
HEATER CURRENT..................... .............................. 0.15
DIREcT INTERELECTRODE CAPACITANCES:Grid No.1 to Plate ................................................. 0.00S5 max
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield.
5.4
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield. . . . .
4.4
- Without external shield, or with external shield connected to cathode.
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ................. " ....•...•....... " .... " .......... .
GRID-N 0.2 (SCREEN-GRID) VOLTAGE .................................... .
GRID-No.2 SUPPLY VOLTAGE ........................................... .
PLATE DISSIPATION ................•..................................
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts. . . . ............................
For grid-No.2 voltages between 150 and 300 volts... . ..................
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value. . . .. ...........................................
Positive-bias value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. • . . . . . . . . . . . . . . . .
178
volts
ampere
pf
pf
pf
300 max
volts
See curve page 70
300 max
volts
3 max
watts
0.5 max
watt
See curve page 70
-50 max
0 max
volts
volt.
------------------- Technical Data ------------------PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....•...•...•...•...•.••....•..
Heater positive with respect to cathode ....••..................•......
90 max
90 max
volts
volts
Characteristics:
Plate Voltage. ••••••........•...•...•.....•.••..•.•..........
100
250
volts
Grid No.3 and Internal Shield .................................. Connected to cathode at socket
Grid-No.2 Voltage. ..•...•.•.•.....•....••....................
100
150
volts
Grid-No.1 Voltage .....•...••.....•.... " .... " .......... '" . .
-1
-1
volt
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.7
1. 4
megohms
Transconductance. . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 3400
4600
I'mhos
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a. . . . . . . . . .. . .
-5
-7.7
volts
Plate Current. •.. ••......••........................ ...... ....
3.6
7.4
rna
Grid-No.2 Current ...• , ..•••....••..........•. ...... ...... ....
1.4
2.9
ma
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in television
receivers. This type has a controlled
Related type:
heater warm-up time for use in re8BH8
KT
Pp
ceivers employing series-connected
heater strings. The pentode unit is used as an if amplifier, a video amplifier, or an
agc amplifier. The triode unit is used in low-frequency oscillator circuits. Outline
8D, OUTLINES SECTION. Tube requires miniature nine-contact socket and may
be mounted in any position.
6BH 8
HEATIilR VOLTAGE (AC/DC) .......................................... "
HEATIilR CURRENT .................................................. .
HEATIilR WARM-UP TIME (Average) ................................... .
DIRECT INTIilRELECTRODE CAPACITANCES (Approx.):
Triode Unit:
Grid to Plate ................................................... .
Grid to Cathode and Heater ...................................... .
Plate to Cathode and Heater ...•..................................
Pentode Unit:
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ...•
Triode Grid to Pentode Plate ........•................................
Pentode Grid No.1 to Triode Plate .•.•................................
Pentode Plate to Triode Plate ....................................... .
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Center Value.):
Triode Unit
PLATE VOLTAGE ..................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............. .
GRID-No.2 VOLTAGE ................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .. .
PLATE DISSIPATION .................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts .............. .
For grid-No.2 voltages between 150 and 300 volts .... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............. .
Heater positive with respect to cathode ............. .
300 max
o max
2.5 ma",
6.3
0.6
11
volts
ampere
seconds
2.4
2.6
0.38
pC
0.046
7
2.4
0.016
0.004
0.095
pf
pf
pf
pf
pf
pf
pf
pC
Penlode Unit
300 max
volts
300 ma",
volts
See curve page 70
o max
volts
3 max
watts
1 max
watt
See curve page 70
200 max
200·max
200 ma",
200·max
volts
volts
150
200
125
82
volts
volts
volts
ohms
150000
7000
-8
15
3.4
ohms
..mhos
volts
ma
ma
Characteristics:
Plate Supply Voltage ................................ .
Grid-No.2 Supply Voltage ............................ .
Grid-No.1 Voltage ................................... .
Cathode-Bias Resistor ............................... .
Amplification Factor ................................. .
Plate Resistance (Approx.) ........................... .
Transconductance . .................................. .
Grid-No.1 Voltage (Approx.) for plate current of 100 "a .. .
Plate Current ....................................... .
Grid-N 0.2 Current .•..••.............................
-5
17
5150
3300
-14
9.5
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ........................... .
For cathode-bias operation •........................
• The dc component must not exceed 100 volts.
0.5 max
LOmax
0.25 ma",
1.0 max
megohm
megohm
179
RCA Receiving Tube Manual
REMOTE-CUTOFF PENTODE
~4
5 p
Miniature type used as rf ampli- H 3
___
6 G2
fier in high-frequency and wide-band
K 2
7 G3
applications. Features high transconductance and low grid-to-plate capaci's
tance. Outline 7B, OUTLINES SECG,'
TION. Tube requires miniature seven-contact socket and may be mounted in any
position.
6BJ6
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:·
Grid No.1 to Plate ................................•...............
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2, GriG
___
6 IC
Z
I
7
H
8
K
Ie
6.3
0.2
volts
ampere
0.03
2.6
1
2000
pf
pf
pf
VOLTAGE-CONTROL SERVICE
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ...••............................................
UNREGULATED DC SUPPLY VOLTAGE .................................. .
DC GRID VOLTAGE ................................................. .
PEAK GRID VOLTAGE- ............................................... .
DC PLATE CURRENT ..•..............................................
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
27000
60000
-135
-440
1.6
25
max
max
max
max
max
max
volts
volts
volts
volts
rna
watts
200 max
volts
Not recommended
Maximum Circuit Value:
Grid-Circuit Resistance:
For use with "Flyback Transformer" high-voltage supply. . .• . . . . . . . . .
3 max
- For interval of 20 seconds maximum duration during equipment warm-up period.
182
megohms
Technical Data =========;;;;;
AVERAGE TRANSFER
CHARACTERISTICS
TYPE 6BK4
E4'= 6.3 VOLTS
2.~
0
~~,
2.0~
/'!
1
...f!
it
~
I /
-2S
II:
(/fl.
/
7
.'"
.q
oJ
oJ
o 'i
0
fir
-20 GRID
-IS VOLTS
-10 -S
.5
'"~
i
0
g2CS -8432TI
H
BEAM POWER TUBE
Miniature type used in audio output stages
of television and radio receivers. Outline 8D,
G,
G,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be mounted
in any position. Heater volts (ae/de), 6.3; amperes. 1.2. Typical operation as class A t ampliRelated type.:
fier: plate and grid-No.2 volts, 250 max; grid12BK5,25BK5
No.1 volts, -5; peak al grid-No.1 volts, 5; plate
NC
dissipation, 9 max watts; grid-No.2 input, 2.5
max watts; plate rna., 35 (zero-signal), 37 (maximum-signal)j grid-No.2 rna., 3.5 (zero-signal), 10
(maximum-signal); plate resistance (approx.), 0.1 megohm; transconductance. 8500 J,Lmhos; load
resistance, 6500 ohms; total harmonic distortion, 7 per cent; power output, S.5 watts; peak heater~
cathode volts, 100 max. This type is used principally for renewal purposes.
6BK5
H
MEDIUM-MU TWIN TRIODE
6BK7A
Miniature types used in directcoupled cathode-drive rf amplifier circuits of vhf television tuners. In such
Related type:
5BK7A
circuits, one triode unit is used as the
PT2
direct-coupled grounded-cathode driverfor the other un:t. These types are also used in push-pull cathode-dri ve rf amplifiers.
Type 6BK7-B has a controlled heater warm-up time for use in receivers employing
series-connected heater strings. Outline 8B, OUTLINES SECTION. Tubes require
miniature nine-contact socket and may be mounted in any position. For typical
operation as a resistance-coupled amplifier, refer to RESISTANCE-COUPLED
AMPLIFIER SECTION. Type 6BK7-A is a DISCONTINUED type listed for
reference only.
6BK7B
HEATER VOLTAGE (AC/DC)
HEATER CURRENT ....
HEATER WARM-UP TIME (Average) lor 6BK7-B ..
DIRECT INTERELECTRODE CAPACITANCES:
Grid to Plate.
Grid to Cathode, Heater, and Internal Shield ..
Plate to Cathode, Heater, and Internal Shield ..
Cathode to Grid, Heater, and Internal Shield ..
Plate to Grid, Heater, and Internal Shield
Unit NO.1
1.8
3
1
6
2 4
6.3
0.45
11
flnit No.2
1.8
3
o9
6
2 4
volt.
ampere
seconds
pi
pi
pi
pi
pi
183
RCA Receiving Tube Manual
Plate to Cathode. . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . .
0.22
Heater to Cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8
Grid of Unit No.1 to Grid of Unit No.2 ................. " ....... ..
Plate of Unit No.1 to Plate of Unit No.2 .......................... .
pf
pf
pf
pI
0.22
3
0.004 max
0.075 max
CLASS A, AMPLIFIER (Each Unit)
Maximum Ralings, (Design-Center Values):
300 max
PLATE VOLTAGE ........... " ................................. .
volts
-50 max
GRID VOLTAGE, Negative-bias value ....................•..............
volts
PLATE DISSIPATION ............. " .................................. .
2.7 max
watts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......................... .
volts
Heater positive with respect to cathode ........................... .
volts
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . .
150
volts
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
56
ohms
43
Amplification Factor. • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4600
ohms
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9300
I'mhos
Plate Current. . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
ma
Grid Voltage (Approx.) for plate current of 10 I'a. .. ....................
-11
volts
* In cathode-drive circuits with direct-coupled drive, it is permissible for this voltage to be as high as
300 volts under cutoff conditions.
• Thedccomponent must not exceed ioo volts.
HALF-WAVE VACUUM RECTIFIER
i§}
1~
5P
Glass octal type used as a damper tube in
horizontal deflection circuits of color television
K 3
6 Ie
receivers. Maximum dimensions: over-all length,
4-5/8 inches; seated height, 4-1/16 inches; diameter, 1-5/8 inches .. Tube requires octal socket.
7 H
Ie 2
Heater volts (ac/dc), 6.3; amperes, 3. Maximum ratings for damper service: peak inverse
I
e
plate volts (absolute maximum), 4500 max;
Ie
H
peak plate ma., 1200 max; de plate rna., 200
max; plate dissipation, 8 max watts; peak heater-cathode volts, 4500 absolute max when heater is negative with respect to cathode (de component must not exceed 900 volts); 300 max when heater is positive
with respect to cathode (de component must not exceed 100 volts). This is a DISCONTINUED type
listed for reference only.
6BL4
MEDIUM-MU TWIN TRIODE
6BL7GT
Glass octal types used as combined
vertical deflection amplifier and vertical deflection oscillator in television
receivers. When so operated, it is
I
recommended that unit No.1 (pins 4,
GT2
5, and 6) be used as the oscillator. Outline 14C, OUTLINES SECTION. Tubes
require octal socket and may be mounted in any position. Type 6BL7-GT is a
DISCONTINUED type listed for reference only.
6BL7GTA
HEATEI{ VOLTAGE (AC/DC) .................................. .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Unit No.1
Grid to Plate. . . . . . . . . . . ., . . . . . . . . . . . . . . . . . . . . . . . .
6
Grid to Cathode and Heater.. . .. . .. . .. .. . .. . . . . .. . . . .
4.2
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . .
0 .9
AMPLIFICATION FACTOR* ........................................... .
PLATE RESISTANCE (Approx.)* ....................................... .
TRANSCONDUCTANCE" ...................................... .
" Each unit; for plate volts, 250; grid volts, -9; plate ma., 40.
6.3
1.5
Unit No.2
6
4.6
0.9
15
2150
7000
volts
amperes
pf
pf
pI
ohms
IJrnhos
VERTICAL DEFLECTION OSCILLATOR OR AMPLIFIER"
For operation in a 5ft5-line, 30-frame system
Maximum Ratings, (Design-Center Values):
Oscillator
DC PLATE VOLTAGE. ....................................
500 max
PEAK POSITIVE-PULSE PLATE VOLTAGEt (Absolute Maximum) ..
PEAK NEGATIVE-PULSE GRID VOLTAGE. . . . . . . . . . . . . . . . . .
-400 max
PEAK CATHODE CURRENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
210 max
AVERAGE CATHODE CURRENT. . . . . . .......................
60 max
184
AmpHfie,.
500 max
2000 "max
-250 max
210 ...ax
60_x
volts
volts
volts
rna
rna
========-- Technical Data ========-PLATE DISSIPATION:
For either plate .........•.............................
For both plates with both units operating ............... .
10 max
12 max
10 max
12 max
watts
watts
200 max
200-max
200 max
200-max
volts
volts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ................. .
Heater positive with respect to cathode ................. .
Maximum Circuit Values:
Grid-Circuit Resistance ................................. .
'.7 max
'.Hmax megohms
• Unless otherwise specified, values are for each unit.
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, SO-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds•
• Under no circumstances should this absolute value be ellceeded.
- The dc component must not exceed 100 volts.
For cathode-bias operation.
*
Kp
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
7 G3p
Miniature type used in frequencychanger service in television receivers.
Outline 8B, OUTLINES SECTION.
Tube requires miniature nine-contact
socket and may be mounted in any
position. Heater volts (ac/dc), 6.3; amperes, 0.45.
IS
6BL8
Related type:
4BL8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE SUPPLY VOLTAGE . . • . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . .
PLATE VOLTAGE . • . . . . • . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE . . . . . . . . . . . . • . . . .
GRID-No.2 VOLTAGE:
Triode
Unit
550 max
250 max
Pentode
Unit
550 max
250 max
550 max
volts
volts
volts
14 max
175 max
200 max
14 max
volts
volts
rna
l.5 max
0.5 max
0.75 max
l. 7 max
watt
watt
watts
100 max
100 max
100 max
100 max
volts
volts
100
170
170
-2
volts
volts
volts
47
0.4
6200
10
2.8
0.01
1500
megohm
pmhos
rna
rna
megohm
With cathode current of 14 rna ....................... .
With cathode current less than 10 rna ................. .
CATHODE CURRENT . . . . . . . • . • . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID-No.2 INPUT:
With plate dissipation greater than 1.2 watt•...........
With plate dissipation less than 1.2 watts ............. .
PLATE DiSSiPATION . • . • . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . ,.
PEAK HEATER-CATHODE VOLTAGE:
Heater negative witb respect to c.athode ............... .
Heater positive with respect to cathode ............... .
Characteristics:
Plate Voltage ....................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 Voltage ...................................... .
Amplification Factor .................................... .
Mu-Factor, Grid No.2 to Grid No.l. ..................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Input Resistance at frequency of 50 Mc .................. .
Equivalent Noise Resistance ............................. .
Maximum Circuit Values:
Grid-N o.I-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
$
H4
~p
H
3
___
2
G
II
6
7
G
I
1\
-2
20
5000
14
0.5 max
0.5 max
MEDIUM-MU TRIODE
Miniature types used as rf amplifier tubes in grid-drive circuits of vhf
television tuners. The double base-pin
connections for both cathode and grid
reduce effective lead inductance and
ohms
0 5 max megohm
1 max megohm
6BN4
6BN4A
Related types:
2BN4A, 3BN4A
185
RCA Receiving Tube Manual
lead resistance with consequent reduction in input conductance. In addition, the
basing arrangement lacilitatesisolation of input and output circuits and permits
short, direct connections to base-pin terminals. Outline 7B, OUTLINES SECTION.
Tubes require miniature seven-contact socket and may be mounted in any position.
Type 6BN4 is a DISCONTINUED type listed for reference only.
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):*
Grid to Plate .................................................. .
Grid to Cathode and Heater .................................... ..
Plate to Cathode and Heater .................................... .
* With external shield connected to cathode.
6.3
0.2
volts
ampere
1.2
3.2
1.4
pf
pf
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ..
GRID VOLTAGE, Positive-bias value.
PLATE DISSIPATION .. .
CATHODE CURRENT .. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .... .
Heater positive with respect to cathode .. .
275 max
o max
2.2 max
22 max
volts
volts
watts
rna
100 max
100 max
volts
volts
Characteristics:
Plate-Supply Voltage ..
Cathode-Bias Resistor .. .
Amplification Factor ... .
Plate Resistance (Approx.) ...
Transconductance ..
Grid Voltage (Approx.) f(}r plate current of 100 "a.
Plate Current ...
150
220
43
5400
7700
~6
9
volts
ohms
ohms
"mhos
volts
rna
Maximum Circuit Value:
Grid-Circuit Resistance ............................................. .
BEAM TUBE
0.5 max
megohm
~4
05 Gz
Miniature type used as combined
H 3
6 G3
limiter, discriminator, and audio--volt.
GI z
7 P •
age amplifier in intercarrier television
Related types:
3BN6,4BN6
and FM receivers. Outline 7C, OUTK I
LINES SECTION. Tube requires
IS
miniature seven-contact socket and may be mounted in any position. Heater volts
(ac/dc), 6.3; amperes, 0.3.
6BN6
LIMITER AND DISCRIMINATOR SERVICE
Maximum Ratings, (Design-Maximum Values):
PLATE-SUPPLY VOLTAGE .............................•.•.............•
GRID-No.2 VOLTAGE ..................•........................... '"
GRID-No.1 VOLTAGE, Positive peak value ............................. .
CATHODE CURRENT .•................................................
PEAK HEATER ,CATHODE VOLTAGE:
Heater negative with respect to cathode .....•....................•••
Heater positive with respect to cathode •..••........................
o The de component must not exceed 100 volts.
330 max
110 max
60 max
13 max
volts
200 max
200 0 max
volts
volts
VOlts
volts
rna
TWIN DIODE-HIGH-MU TRIODE
Miniature type used in a wide
variety of applications in color and
Related type:
black-and-white television receivers.
IBNI
This type has a controlled heater
I
warm-up time for use in receivers emPD2
KT
ploying series-connected heater strings. The triode unit is used in burst-amplifier,
af amplifier, and low-frequency oscillator applications. The diode units are .used
6BN8
186
========= Technical Data =========
in phase-detector, ratio-detector or discriminator, and horizontal AFC discriminator circuits. Outline 8D, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be mounted in any position.
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
HF..ATER WARM-UP TIME (Average) ................................... .
DIRECT INTERELECTRODE CAPACITANCES:
Triode Grid to Triode Plate ....................................... .
Triode Grid to Cathode and Heater ................................ .
Triode Plate to Cathode and Heater ............................... .
Plate of Diode Unit No.1 to Triode Grid ............................ .
Plate of Diode Unit No.2 to Triode Grid ............................ .
Plate of Diode Unit No.1 to Plate of Diode Unit No.2 ................ .
Diode Cathode to All Other Electrodes (Each Diode Unit) ............ .
Diode Plate to Diode Cathode and Heater (Each Diode Unit) ......... .
Diode Cathode to Diode Plate and Heater (Each Diode Unit) ......... .
Diode Plate to All Other Electrodes (Each Diode Unit) ............... .
6.3
0.6
11
volts
ampere
second.
2.5
3.6
0.25
0.06 max
0.1 max
0.07 max
5
1.9
4.8
3
pf
pf
pf
pf
pf
pf
pf
pf
pf
330 max
o max
1.7 max
volts
volts
watt.
200 max
200-max
volts
volt.
pC
TRIODE UNIT AS CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Positive bias value ................................... .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
Characteristics:
Plate Voltage ........................................... .
Grid Voltage ........................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) ............................... .
Transconductance . ...................................... .
Grid Voltage (Approx.) for plate current of 10 I'a ........... .
Plate Current .......................................... .
100
-1
75
21000
3500
-2.5
1.6
250
-3
70
28000
2500
-5.5
1.6
volts
volts
ohms
I'mho.
volts
ma
Maximum Circuit Value:
Grid-Circuit Resistance ...•.......................•..•..............•
1.0 max
megohm
DIODE UNITS
Maximum Ratings, (Design-Maximum Valtles):
PLATE CURRENT (Each Unit):
Peak ........•..................................................•
DC ........................................................... ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
- The de component must not exceed 100 volts.
AVERAGE
•
.~
o
I
volts
volts
CHARACTERISTICS
TY'E 6BNB
~~
:
i"J
1-//
II
/
II l7
rna
rna
'fa'.3 VOLTS
1/
I
9 max
TRr0 DE uNIT
:;>
>--
54 max
/
100
/
lit
1
/
/
/
I
7
:>
.1j
J
;-;
~
/
V l/ . / /
zoo
./
300
'00
'LATE WLTS
100
'00
nell-UUT
187
RCA Receiving Tube Manual
H
POWER PENTODE
68Q5
Related type:
8BQS
Miniature type used in the output
stage of audio-frequency amplifiers.
Outline 8E, OUTLINES SECTION.
Tube requires miniature nine-contact
socket and may be mounted in any
position.
HEATER VOLTAGE (AC/DC) ..................................... .
HEATER CURRENT .................................................•.
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate. . . . . . . . . . . . .. . ............................. .
Grid No.1 to Cathode. Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................ .
Grid No.1 to Heater ............................................ .
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ................................................... "
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ............... .
GRID-No.2 INPUT ................................................... .
PLATE DISSIPATION ................................................. .
CATHODE CURRENT ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................. .
Heater positive with respect to cathode ............................. .
• The de component must not exceed 100 volts.
Typical Operation:
Plate Voltage ...................................................... .
Grid-No.2 Voltage .................................................. .
Grid-No.1 (Control-Grid) Voltage .................................... .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Load Resistance .................................................... .
Total Harmonic Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ..•.........................................
For cathode-bias operation ........................................ .
PUSH-PULL CLASS ABI AMPLIFIER
Maximum Ratings: (Same as for single-tube class At amplifier)
Typical Operation, (Valu •• are for two tub.s):
250
Plate Supply Voltage ................................... .
250
Grid-No.2 Supply Voltage ............................... .
Cathode-Bias Resistor ................................... .
130
Peak AF Grid-No.1-to-Grid-No.l Voltage ................. .
22.6
Zero-Signal Plate Current ............................... .
62
Maximum-Signal Plate Current .......................... .
75
7
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
15
8000
Effective Load Resistance (Plate-to-plate) ................. .
3
Total Harmonie Distortion .............................. .
11
Maximum-Signal Power Output .......................... .
Maximum Circuit Values:
Grid-No.I-Circuit Resi.tance:
For fixed-bias operation ........................................... .
For cathode-bias operation ......................................... .
188
Ie
6.3
0.76
volts
ampere
0.5 max
10.8
6.5
0.25 ma",
pf
pf
pf
pf
300 max
300 max
o max
2 max
12 max
65 max
volts
volts
volt.
watts
watts
rna
100 max
100'max
volts
volts
250
250
-7.3
6.2
48
50.6
5.5
10
38000
11300
4500
10
5.7
0.3 max
1.0 max
300
300
130
28.3
72
92
8
22
8000
4
11
0.3 max
1.0 max
volt.
volts
volts
volts
rna
rna
rna
rna
ohms
"mhos
ohms
per cent
watts
megohm
megohm
volts
volts
ohms
volts
rna
rna
rna
rna
ohms
per cent
watts
megohm
megohm
------------------- Technical Data
C;!P5C;1
~
NC
3
H 2
---
I
NC
7 H
8
K
G3
BEAM POWER TUBE
Glass octal types used as horizontal deflection amplifiers in television receivers. Outline 15C, OUTLINES SECTION. Tubes require octal socket and may be mounted in any
position. These types may be supplied
with pin No.1 omitted. Type 6BQ6GT is a DISCONTINUED type listed
for reference only.
6BQ6GT
6BQ6GTB
/6CU6
Related type.:
12BQ6GTB/12CU6, 17BQ6GTB, 25BQ6GTB/25CU6
HEATER VOLTAGE (AC/OO) ........................................... .
6.3
volts
HEATER CURRENT .................................................. .
amperes
1.2
DIRECT INTERELECTRODE CAPACITANCES (Approx., 6BQ6-GTB/6CU6):
Grid No.1 to Plate...............................................
0.6
pf
pf
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.S. •....... ....
15
pf
Plate to Cathode, Heater, Grid No.2, and Grid No.S..... ............
7
TRANSCONDUCTANCE* (6BQ6-GTB/6CU6)
5900
"mhos
Mu-FACTOR, Grid No.2 to Grid No.1'.................................
4.S
• For plate volts, 250; grid-No.2 volts, 150; grid-No.1 volts, -22.5; plate rna., 57; grid-No.2 rna., 2.1.
For plate and grid-No.2 volts, 150; grid-No.1 volts, -22.5.
*.
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 51!5-line, !O-/rame 8118tem
Maximum Ratings, (De8ign-Center Values):
6BQ6-GT
DC PLATE VOLTAGE..................................
550 max
PEAK POSITIVE-PULSE PLATE VOLTAGEe (Absolute Maximum)
5500tmax
PEAK NEGATIVE-PULSE PLATE VOLTAGE. • . . . . . . . . . . . . . .
-1250 max
DC GRID-No.2 (SCREEN-GRID) VOLTAGE. . . . ............
175 max
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID)VOLTAGE
-SOO max
PEAK CATHODE CURRENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
400 max
AVERAGE CATHODE CURRENT. . . . . . . . . . . . . . . . . . . . . . . . .
110 max
GRID-No.2 INPUT....................................
2.5 max
PLATE DISSIPATION# . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............. .
200 max
Heater positive with respect to cathode ............. .
200-max
BULB TEMPERATURE (At hottest point) ................ .
220 max
6BQ6-GTB/6CU6
600 max
volts
6000tmax
volts
-1250 max
volts
200 max
volts
-300 max
volts
400 max
rna
110 max
rna
2.5 max
watts
11 max
watts
200 max
200-max
220 max
volts
volts
°C
Maximum Circuit Value:
Grid-N o.l-Circuit Resistance ........................................ .
0.47 max megohm
e The duration of the.voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontaJ scanning cycle is 10 microseconds.
t Under no circumstances should this absolute value be exceeded.
# An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
- The de component must not exceed 100 volts.
MEDIUM-MU TWIN TRIODE
6BQ7
Miniature types used in directcoupled cathode-drive rf amplifier circuits of vhf television tuners. In such
Related types:
circuits, one triode unit is used as the
4BQ7A,5BQ7A
direct-coupled grounded-cathode driver for the other unit. These types are also used in push-pull cathode-drive rf amplifiers.
Outline 8B, OUTLINES SECTION. Tubes require miniature nine-contact socket
and may be mounted in any position. For typical operation as a resistance-coupled
amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION. Type
6BQ7 is a DISCONTINUED type listed for reference only.
6BQ7A
HEATER VOLTAGE (AC/OO) ............................................ .
6.3
HEATER CURRENT ...............................................•....
0.4
DIRECT INTERELECTRODE CAPACITANCES (6BQ7-A):o
Unit No.1
UnitNQ.1l
Grid to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . .
1 .2
1.2
Grid to Cathode, Heater, and Internal Shield. . . . . . . . . . . . . .
2.6
Cathode to Grid, Heater, and Internal Shield ............. .
5.0
Plate to Cathode, Heater, and Internal Shield ............ .
1.2
Plate to Grid, Heater, and Internal Shield...............
2.2
Plate to Cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.12
0.12
Heater to Cathode (6BQ7-A) . . . . . . . . . . . . . . . . . . . . . . . . . .
2.6
2.6
Plate of Unit No.1 to Plate of Unit No.2. . ................... 0.010 max
Plate of Unit No.2 to Plate and Grid of Unit No.1.... . .. ..•..• 0.024 max
volts
ampere
pf
pf
pf
pf
pf
pf
pf
pf
pf
189
RCA Receiving Tube Manual
CLASS Al AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Center Values):
PLATE SUPPLY VOLTAGE .. , •••.•....•.•••.••.•••••••••••.••••••••• " • "
PLATE DISSIPATION .••••....•.•.•...•....•...•.•..•••.••.•••••••..••.•
CATHODE CURRENT •• '........•.•..••••••••...•.•..••.•..•.••..•••.••••
PEAK HEATER-CATHODE VOLTAGE:
250*maz
2maz
20ma",
volt.
watts
Heater negative with respect to cathode .............................•
Heater positive with respect to cathode ............................. .
200*ma",
200_a",
volt.
volts
Characteristics:
Plate Supply Voltage. . • . .. .. . . .. . . . . . . . . . . . . . . . .. . .. . . . ..
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amplification Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.) ... . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid Voltage (Approx.):
For plate current of 100 "a .......................... .
For plate current of 10 "a. . . . . . . . . . . . . . . . . . . . . . . . . . . .
6BQ7
150
220
35
5800
6000
9
6BQ7-A
150
220
38
5900
6400
9
-6.5
-10
rna
volts
ohlll.l
ohm.
"mho.
rna
volt.
volts
Maximum Circuit Value:
Grid-Circuit Resistance ... '" ........................................ .
0.5 ma", megohm
With external shield connected to internal shield.
In cathode-drive circuits with direct-coupled drive, it is permissible for this voltage to be a. high a.
300 volts .
• The dc component must not exceed 100 volts.
o
*
AVERAGE PLATE CHARACTERISTICS
FOR EACH UNIT
TYPE 6BQ7-A
E,.~e~3
o
100
200
VOLTS
300
.00
PLATE VOLTS
100
.ZCM-TSJ.ftIT
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature types used in a wide
variety of applications in color and
Related type:
black-and-white television receivers.
S8RS
Especially useful as combined triode
oscillator and pentode mixer in vhf
television tuners. Type 6BR8-A has a controlled heater warm-up time for use in
receivers employing series-connected heater strings. Outline 8B, OUTLINES
SECTION. Except for basing arrangement and grid-No.l-to-plate capacitance of
pentode unit, these types are identical with miniature types 6U8 and 6U8-A,
respecti vely.
6BR8
6BR8A
HALF-WAVE VACUUM RECTIFIER
6B53
Related types:
12853, 17853
190
Novar type used as damper tube
in horizontal-deflection circuits of
black-and-white television receivers.
Outline IOD, OUTLINES SECTION.
Tube requires novar nine-contact sock-
========= Technical Data =========
et and may be mounted in any position. Socket terminals 1, 3, 6, and 3 should not
be used as tie points; it is recommended that socket clips for these pins be removed
to reduce the possibility of arc-over and to minimize leakage. It is especially important that this tube, like other power-handling tubes, be adequatdy ventilated.
HEATER VOLTAGE (AC /OC) ........................ .
HEATER CURRENT ............................... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Plate to Cathode and Heater ..
Cathode to Plate and Heater ..
Heater to Cathode ....
DAMPER SERVICE
For operation in a 525-line, 30-frame system
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE-. . .
. ........ .
PEAK PLATE CURRENT. . ... .. .
. ... .
DC PLATE CURRENT ....................... .
PLATE DISSIPATION ............... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .. .
Heater p,sitive with respect to cathode ..... .
6.3
1.2
volts
amperes
6 5
9
2.8
pf
pf
pf
5000
1100
200
6
max
max
max
max
volts
rna
rna
watts
5000·max
300 0 max
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 140 rna .............. .
12
volts
- The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The de component must not exceed 900 volts.
o The de component must not exceed 100 volts
H
MEDIUM-MU TWIN TRIODE
6B58
Miniature type used in directcoupled cathode-drive rf amplifier cirRelated type:
cuits of vhf television tuners. In such
4Bsa
I
circuits, one triode unit is used as the
.. z
IS
direct-coupled grounded-cathode driver for the other unit. This type is also used in push-pull cathode-drive rf amplifiers.
Outline 3B, OUTLINES SECTION. Tube requires miniature nine-contact socket
and may be mounted in any position. Heater volts (ac/dc), 6.3; amperes, 0.4.
CLASS Al AMPLIFIER (Eaeh Unit)
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ....................................................
PLATE DISSIPATION. . . . . . . . . .. . ....................................
CATHODE CURRENT .................................................
PFlAK HEATER-CATHODE VOLTAGE:
Heat.er negative with respect to cathode ............................
Heater positive with respect to cathode .............................
.
.
.
150 max
2 max
20 max
volts
watts
rna
.
.
200 max
200 max
volts
volts
Characteristics:
Plate-Supply Voltage ................................................
Cathode-Bias Resistor. .. ..... . ....................................
Amplification Factor ........ " .....................................
Plate Resistance (Approx.) ...........................................
.
.
.
.
Transconductance. . . . . . . . . . . .. . .................................... .
Plate Current ...................................................... .
Grid Voltage (Appro •. ) for plat" current. o( 10 /la" ...................... .
150
220
36
5000
7200
10
volts
ohms
ohms
~mhos
rna
volta
-7
Maximum Circuit Value:
Grid-Circuit Resistance ............................................ .
0.5 max
megohm
* This value applies to unit No.2 only.
SHARP-CUTOFF TWIN PENTODE
Miniature type used as combined
sync separator, sync clipper, and agc
amplifier tube in television receivers.
Outline 3D, OUTLINES SECTION.
Tube requires miniature nine-contact
socket and may be mounted in any
position.
6BU8
Related typal:
3BUa,4BUa
191
RCA Receiving Tube Manual
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURENT ................................................... .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.3 to Plate (Each Unit) ........ '.' .......................... .
Grid No.1 to All Other Electrodea .................................. .
Grid No.3 to All Other Electrodes (Each Unit) ....................... .
Plate to All Other Electrodes (Each Unit) ........................... .
Grid No.3 of Unit No.1 to Grid No.3 of Unit No.2 ................... .
6.3
0.3
volts
ampere
1.9
6
3.6
3
0.015 max
pf
pf
pf
pf
pf
300 max
volts
50 max
-50 max
a max
150 max
-50 max
12 max
0.75 max
1.1 max
volts
volts
volts
volts
volt.
rna
watt
watts
200 max
200·max
volts
volt.
CLASS A, AMPLIfiER
Maximum Ratings, (D.sign-Maximum Values):
PLATE VOl.TAGE (Each Unit) ........................................ .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE (Each Unit):
Peak positive value ............................................... .
DC negative value ............................................... .
DC positive value ................................................ .
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
GRID-No.1 (CONTROIrGRID) VOl.TA!lE, Negative bias value ............... .
CATHODE CURRENT ................................................. .
GRID-No.2 INPUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . ................. .
PLATE DISSIPATION (Each Unit) ...................................... .
PEAK HEATER-CATHODE VOl.TAGE:
Heater negative with respect t.o cathode ............................ .
Heater posit.ive with respect t.o cathode ............................. .
Characteristics:
With 80th Unit. Operating
Plate Voltage (Each Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.3 Voltage (Each Unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.1 Voltage. . . . . . . ......... .......................
Plate Current (Each Unit) ............................... .
Grid-No.2 Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cathode Current. . . . . . . . . . .. ............................
100
-10
67.5
100
0
67.5
6.5
6.6
2.2
3.3
7.8
*
volt.
volts
volts
volts
rna
rna
rna
With One Unit Operatingt
Plate Voltage............................................
Grid-No.3 Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Voltage.. .....................................
Grid-No.1 Voltage. . . . . .. ................................
Grid-No.3 Transconductance ............................. .
Grid-No.1 Transconductance. . . . . . . . . . . . . . . . . . . . . . .. . . . . . .
Plate Current .......................................... .
Grid-No.3 Voltage (Approx.) for plate current of 100 "a ..... .
Grid·No.l Voltage (Approx.) for plate current of 100 I'a ..... .
AVERAGE
100
0
67.5
100
0
67.5
0
volts
volt.
volts
volts
,umhos
•
lRO
~lmhoB
1500
2.2
-4.5
--2.3
rna
volts
volt..
CHARACTERISTICS
WITH Ec, AS VAR'ABLE
5
GRIO-N!I VO\.T$ [C -I.
TVPE 6BU8
~Ef.
8.3 VOLTS
.l V
GRIO-N! 3 VOLTS*O
GRIO-N! 2 VOLTS.87.S . /
0.5
PLATE AND GRID/
H!3 OF OTHER
UNIT -GROUNDED
J
/~ ....v::: .....
t,
1//V
,
V~ V
P.
VI"""
/"
....-
I"""
1--
- ------ - - b.,o-GRIO-N!I MILLI~~ERES ·~11,.O.5
.. - - -- - -- -- --
V
~
-
- ----
.O.!.
-0.5
-I.Q.-'.5
~ ro
1-2.0
50
'00
150
200
PLATE VOLTS
192
0
250
300
350
========= Technical Data ========~
Maximum Circuit Values:
Grid-No.3-Circuit Resistance (Each Unit) .............................. .
Grid-No.l-Circuit Resistance ......................................... .
• The dc component must not exceed 100 volts.
* Adjusted to give a dc grid-No.1 current of 100 microamperes.
t With plate and grid No.3 of the other unit connected to ground.
o.5 max
o.5 max
megohm
megohm
AVERAGE CHARACTERISTICS
2.5;--'__- .__-r__;r~~~~W~'~TH~E;C~3~A~S~V~A~RI~A~BL;E~~~~-r__~~~--r--,
~~f-":
~!--r:::.~ TYPE 6BUB
I.----:::~......[ f o e.3 VOLTS
.,¥
1./
V
,/"" I / GRIO-N •• VOLTs-n.S
f""'./
2.0
:::
!
o/!/v /
I'
/1 Y./
I-f-'ft/,-...I/<--f-'~+
/
1.5
/
. /
~
~
V
I I
I/
II
I / /
1.0
V
II /
V
II
/
'/11 V V V /
50
H
100
V
V GA!~:IN!IMILLIAMPERES
/V 1'/ PLt:~T~~ 't~,~N!3
V
+,y
' ~i ~f
'lJ /VVV
o
./
V
~
V
V
V /
I
V
~1 1,( f",L, II
li
II
I
J
ISO
17
1 .../
V /
GROUNDED
/
J
I / ~Z
..Y.__ /
1
......-./
V /
/'
V /
;VI' ,,/
I 7 7/ /
os
V pI. . . ..!-..•...... v
....
II
V /
1_ _
1-
/
,0',£-'/1--A-V_V-l_
/ )7 £:';.L-"/-I--+-1
V~
y-Y1
200
250
PL4T( VOl.TS
300
350
",,00
02CM-g.4Z9T
TWIN DIODE-MEDIUM-MU TRIODE
Miniature type used as combined
synchronous detector and chrominance
amplifier in color television receivers;
also used as combined FM detector
and af voltage amplifier. Tube has controlled warm-up time for use in series-connected heater strings. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be operated in any position. Heater volts (ac/dc), 6.3; amperes, 0.6; warm-up time
(average), 11 seconds.
6BV8
TRIODE UNIT AS CLASS At AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE.. . . . . . .
. ........................... .
GRID VOLTAGE, Positive-bias value ......... .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......... .
Heater positive with respect to cathode .... .
..............
330 max
o max
2.7 max
volts
volts
watts
...........
200 max
2000 max
volts
volts
200
volts
volts
ohm.
.............
...........
Characteristics:
Plate Voltage .................................... .
Grid Voltage ..................................... .
Cathode Resistor ................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) ............. .
Transconductance.
. .............. .
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . .
. ........ .
Grid Voltage (Approx.) for plate current of 100 ).Ia .......... .
75
0
14
330
33
5900
5600
11
-11
ohms
pmhos
rna
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
O. 1 max
O. 5 max
megohm
megohm
193
RCA Receiving Tube Manual
DIODE UNITS-TWO
Values are for eaeh unit
Maximum Ratings, (Design-Maximum Values):
PLATE CURRENT ........................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...... .
Heater positive with respect to cathode .. .
10 max
rna
200 max
2000 max
volts
volts
Characteristics, Instantaneous Test Candition:
volts
5
Tube Voltage Drop for plate current of 23 rna.
o The de component must not exceed 100 volts.
H
FULL-WAVE VACUUM RECTIFIER
Miniature type used in full-wave NC
power supplies having high dc output current requirements. Outline 8D,
NC
Related type:
12BW4
OUTLINES SECTION. Type 6BW4
requires miniature nine-contact socket
PDz
K
and may be mounted in any position. It is especially important that this tube, like
other power-handling tubes, be adequately ventilated Heater volts (ac/ dc), 6.3;
amperes, 0.9.
6BW4
FULL- WAVE RECTIFIER
Maximum Ratings, (Design-Center Values):
PEAK INVERSE PLATE VOLTAGE ...................................... .
AC PLATE SUPPLY VOLTAGE (Per Plate, rms) ........................... .
STEADy-STATE PEAK PLATE CURRENT (Per Plate) ...................... .
DC OUTPUT CURRENT .............................................. .
TRANStENT PEAK PLATE CURRENT (Per Plate) .......................... .
DC HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........... '......... " ..... .
1275
450
350
62.5
2
Typical Operation:
Choke
900
Filter Input
AC Plate-To-Plate Supply Voltage (rms)".. ... ...... .......
Filter Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Effective Plate Supply Resistance per Plate. . . . . . . . . . .
Filter Input Choke ..................................... .
DC Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Output Voltage at Input to Filter (Approx.) . . . . . . . . . . . .
• AC plate supply voltage is measured without load.
Capacitor
650
40
82
100
330
max
max
max
max
max
volts
volts
rna
rna
amperes
450 max
volts
10
100
360
volts
I'f
ohms
henries
rna
volts
TWIN DIODESHARP-CUTOFF PENTODE
Miniature type used in television
receivers; diodes are used as horizontal
Related type:
phase detectors; pentode is used as a
SBW8
sound if amplifier, sound limiter, and
I
agc keyer. Outline 8B, OUTLINES
PDz
Pp
SECTION. Heater volts (ac!dc), 6.3; amperes, 0.45. Tube requires nine-contact
socket and may be operated in any position.
6BW8
PENTODE UNIT AS CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ...................... .
GRID-No.2 VOLTAGE ............... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Positi ve-bias value ....................................... .
Negative-bias value ....................... .
GRID-No.2 INPUT:
For grid-N 0.2 voltages up to 165 volts ............. .
For1l:rid~No.2 voltages between 165 and 330 volts.
PLATE DISSIPATION. . . . . . . . . . . . . .. . ............. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........ .
Heater positive with respect to cathode ..... .
330 max
volts
330 max
volts
See curve page 70
o max
-55 max
volts
volts
o 55 max
watt
See curve page 70
3 max
watts
volts
volts
Characteristics:
Plate Voltage ...................................................... .
Grid-No.2 Voltage ........................................... .
Cathode-Bias Resistor .............................................. .
Plate Resistance (Approx.) . .
. ................................... .
194
250
110
68
0.25
volts
volts
ohms
megohm
========= Technical Data =========
Transconductance ............................................... .
Grid-No.1 Voltage (Approx.) for plate current of 1OI'a ............... .
Plate Current.. . . . . . . . . . . . . . . . . . . . . .. . ........................... .
Grid-No.2 Current. ........... .
5200
-10
10
3.5
I'mhos
volts
ma
ma
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
0.1 max
0.5 max
megohm
megohm
DIODE UNITS (Each Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE CURRENT .......................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode. . . . . . . . . . .
. .......... .
° The de component must not exceed 100 volts.
5 max
ma
200 max
2000 max
volts
volts
MEDIUM-MU TWIN TRIODE
Glass octal type used as combined
vertical deflection amplifier and vertical deflection oscillator in television
receivers. When so operated, it is
recommended that unit No.1 (pins 4,
5, and 6) be used as the oscillator. Outline 14C, OUTLINES SECTION. Tube
requires octal socket and may be mounted in any position.
6BX7GT
HEATER VOLTAGE (AC/OC) ........................................... .
HEATER CURRENT .............................•.....................
AMPLIFICATION FACTOR* ............................................ .
PI,ATE RESISTANCE (Approx.)* ....................................... .
TRANSCONDUCTANCE* ............................................... .
For plate volts, 250; cathode-bias resistor, 390 ohms; plate rna., 42.
*
6.3
1.5
10
1300
7600
volls
amperes
ohms
~mho8
VERTICAL DEFLECTION OSCILLATOR OR AMPLIFIER (E(!ch Unit)
For operation in a 525-line, SO-frame system
Oscillator
DC PLATE VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
500 max
PEAK POSITIVE-PULSE PLATE VOLTAGE
(Absolute Maximuml# ............................ .
-400 max
PEAK NEGATIVE-PULSE GRID VOLTAGE ................. .
180 max
PEAK CATHODE CURRENT ............................ .
60 max
AVERAGE CATHODE CURRENT ........................ .
PLATE DISSIPATION:
10 max
For either plate .................................. .
12 max
For both plates with both units operating ........... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............. .
Heater positive with respect to cathode ............. .
Maximum Ratings, (Design-Center Values):
Amplifier
500 max
volt.
2000"max
-250 max
180 max
60 max
volts
volts
rna
ma
10 max
12 max
watts
watts
volts
volts
Maximum Circuit Values:
Grid-Circuit Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max
2. 2·max megohms
# The duration of the voltage pulse must not exceed 15 per cent of one verlical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
" Under no circumstances should this absolute value be exceeded.
° The de component must not exceed 100 volts.
• For cathode-bias operation.
02.4
~
FULL-WAVE VACUUM RECTIFIER
SPOI
Octal type ha ving high perveance used as a
damper tube in horizontal deflection circuits of
television receivers or as a rectifier in conventional power-supply applications. Outline 19A,
OUTLINES
SECTION. Tube requires octal
2
7
H
H socket and may be mounted in any position. It
is especially important that this tube, like other
I
8
power-handling tubes, be adequately ventilated.
K02
KOI
Heater volts (ac/dc), 6.3; amperes, 1.6. Maximum ratings for damper service (each unit): peak inverse plate volts (absolute maximum), 3000 max;
peak plate rna., 525 max; de plate rna., 175 max. Peak heater-cathode volts: heater negative with respect
to cathode, 450 max; heater positive with respect to cathode, 100 max. This type is used principally for
renewal purposes.
Ie 3
6BY5GA
195
RCA Receiving Tube Manllal
4
~
PENT AGRID AMPLIFIER
H 3
sP
___
6 G2
Miniature type used as a gated
=:=
G4
amplifier in color television receivers.
K 2
7
In such service, it may be used as a
Relaled Iype:
Gs
G3
,
combined sync separator and sync
3BY6
G,
clipper. Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contact socket and may be mounted in
any position.
6BY6
HEATER VOLTAGE (Ae/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ............................................. "
Grid No.3 to Plate .............••................................
Grid No.1 to Grid No.3 .......................................... .
Grid No.1 to All Other Electrodes ...........•......................
Grid No.3 to All Other Electrodes ................................. .
Plate to All Other Electrodes ..................................... .
Characteristics:
volts
ampere
6.3
0.3
0.08 max
0.35 max
0.22 max
5.4
6.9
7.6
pI
pI
pI
pI
pI
pI
CLASS Al AMPLIFIER
250
100
-2.5
-2.5
500
1900
6.5
9
-15
-12
Plate Voltage ...................................................... .
Grids-No.2-and-No.4 Voltage ....................................... ..
Grid-No.3 Voltage .....•.............................................
Grid-No.1 Voltage .................................................. .
Grid-N o.3-to-Plate Transconductance ................................. .
Grid-No.1-to-Plate Transconductance ................................. .
Plate Current ..................................................... ..
Grids-No.2-and-No.4 Current ........................................ .
Grid-No.3 Volts (Approx.) lor plate current 01 35"a and grid-No.1 volts =-4
Grid-No.1 Volts (Approx.) lor plate current 01 35"a and grid-No.3 volts =0 ..
volts
volts
volts
volt.
J'mhos
"mho.
rna
rna
volt.
volts
GATED AMPLIFIER
Maximum Ratings, (Design-ll4'aximum Values):
PLATE VOLTAGE .................................................... .
GRIDS-No.2-AND-No.4 VOLTAGE ...................................... .
GRIDS-No.2-AND-No.4 SUPPLY VOLTAGE ............................... .
GRID-No.3 VOLTAGE:
Negative hias value ............................................. .
Positive bias value ............................................. "
Positive peak value ..............................................•
GRID-No.1 VOLTAGE, Negative bias value ............................. .
PLATE DISSIPATION ................................................. .
GRID-No.3 INPUT .................................................. .
GRIDS-No.2-AND-No.4 INPUT:
For grids-No.2-and-No.4 voltages up to 165 volts ................... .
For grids-No.2-and-No.4 voltages between 165 and 330 volts ....... '"
AVERAGE OPERATION CHARACTERISTICS
0
8
8
\~
.t--f-__
Ic.&.~
-..,J_
--
/'
//'
It r
--
V
1/
V
::;
-4
-
-- -
-2
0
o max
27 max
-110 max
2.3 max
0.1 max
TYPE 6BY6
GRID-Nt,
VOLTS=-Z.S
GRIDS- NI2 L
NI4 VOLTSzlOO
..
..
:
r
-2
u
I:!.
z
-0
z
0;'
D
-
i
-8
Ib
"
-10
200
PLATE VOLTS
300
volts
volts
volts
volts
watts
watt
1 . 1 max
watts
See curve page 70
10 ::!
::I
0
''''T-
-55 max
Rio-N' 3 VOLTS ECJ-4- S:
100
196
~
<
XI>
f/ ...-
2
0:
------ ---- _.- ::!J
'-:. --=:- =' - -...-
..
,s"
_~ID-!!13 .!~LTS_E.s3=.:.IO
330 max
volt.
See curve page 70
330 max
volts
400
12CM-8131TI
========= Technical Data =========
GRID-No.1 INPUT ............. " .................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode . ........................... .
Characteristics as Sync Separator ond Sync Clipper:
Plate Vol tage ...................................................... .
Grid-No.3 Voltage ................................................. ..
Grids-No.2-and-No.4 Voltage ....................................... ..
Grid-No.1 Voltage .................................................. .
Plate Current ...................................................... .
Grids-No.2-and-No.4 Current ........................................ .
Grid-No.3 Volts (Approx.) for plate voltage of 25 volts, grids-No.2-and-No.4
voltage 01 25 volts, grid-No.1 voltage of 0 volts, and plate current 01 50 Jla
Grid-No.1 Volts (Approx.) lor plate voltage of 25 volts, grids-No.2-and-No.4
voltage 01 25 volts, grid-No.3 voltage of 0 volts, and plate current 01 50 "a
Maximum Circuit Values:
Grid-No.1 or Grid-No.3-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation . ...................................... .
o The dc component must not exceed 100 volts.
0.1 max
watt
200 max
2000 max
Yolts
volts
10
0
25
0
1.4
3.5
volts
yolts
volts
volt.
rna
rna
-2.5
volts
-2.3
yolts
0.5 max
1.0 max
megohm
megohm
DIODESHARP-CUTOFF PENTODE
Miniature type used in diversified
applications in television receivers. The
pentode unit is used as an rf amplifier
and the high-perveance diode as a
limiter or detector. This type has a
controlled heater warm-up time for use in receivers employing series-connected
heater strings. Outline 8D, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be mounted in any position. Heater volts (ae/dc), 6.3;
amperes, 0.6; warm-up time (average), 11 seconds.
6BY8
PENTODE UNIT AS CLASS AI AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value.. . ............ .
GRID-No.2 (SCREEN GRID) SUPPLY VOLTAGE ............................ .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
300 max
volts
o max
volts
300 max
volts
See curve page 70
-50 max
volts
Negative bias value . ............................................. .
o max
volt.
Positive bias value . .............................................. .
3 max
watts
PLATE DISSIPATION ................................................. .
GRID-No-2 INPUT:
o 65 max
watt
For grid-No.2 voltages up to 150 volts ........ '" .................. .
See curve page 70
For grid-No.2 voltages between 150 and 300 volts ................... .
PEAK HEATER-CATHODE VOLTAGE:
volt.
200 max
Heater negative with respect to cathode ........................... .
volt.
200·max
Heater positive with respect to cathode ............................ .
Characteristics:
250
volt.
Plate Supply Voltage ........... '" ..................... .
100
Connect to cathode at socket
GRID No.3 ........................................... .
150
volts
Grid-No.2 Supply Voltage ............................... .
100
150
Cathode-Bias Resistor .................................. .
68
ohms
0.5
1
megohm
Plate Resistance (Approx.) .............................. .
5200
Jlmho.
Transconductance . ..................................... . 3900
-6.5
volts
Grid-No.1 Voltage (Approx.) for plate current of 10 Jla ....... . -4.2
10.6
rna
5
Plate Current ....... , .................................. .
2.1
4.3
rna
Grid-No.2 Current ...................................... .
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
0.25 max megohm
For fixed-bias operation .......................................... .
1.0 max mpgohm
For cathode-bias operation ........................................ .
• The dc component must not exceed 100 volts.
DIODE UNIT
Maximum Ratings, (Design-Center Values):
volts
PEAK INVERSE PLATE VOLTAGE ...................................... .
430 max
180 max
PEAK PLATE CURRENT .............................................. .
rna
45 max
rna
DC PLATE CURRENT ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
200 max
volts
Heater negative with respect to cathode .........•...................
volts
200·max
Heater positive with respect to cathode ............................ .
• The dc component must not exceed 100 volts.
197
RCA Receiving Tllbe Manllal
SEMIREMOTE-CUTOFF PENTODE
6BZ6
Related typel:
3816,4816,12816
Miniature type used in gain-controlled video if stages of television
receivers. Outline 7B. OUTLINES
SECTION. Tube requires miniature
seven-contact socket and may be
mounted in any position.
H~"'
;;;" ."
2
. ..•.. , . . . . . • ~Vitit~;t't'
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ............................... .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and
Internal Shield ................................ .
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield .................................. .
• With external shield connect.ed to ('a thode.
..
G3
,
,s
G,
6.3
0.3
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT. • . . . . . • . . • • • • .
7
K
volts
ampere
External
Shield
0.025 mnx
With
Externul
Shield"
0.015 m"",
pC
2
3
pI
pC
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Val"es):
330 max
vol ts
o max
volts
330 max
volts
See curve page 70
o m.ax
volt.s
2.3 max
watts
PLATE VOLTAGE .................................................... .
GRID No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive Value ................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............................ .
GRID-No.2 VOLTAGE ................................................ .
GUID-No.l (CONTIIOI.-GIIID) VOLTAGE, Positive bias value ................ .
PLATE DISSIPATION ................................................••
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ............................. .
For grid-No.2 voltages between 165 and 330 volts ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
O. 55 mnx
watt
See curve page 70
volts
volt.
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. . . . . . . . . . . .
125
volts
Grid No.3. .. .. ........ .... . . .. ... ... ...... ...... ...... ..... Connected to cathode at socket
Grid-No.2 Supply Voltage... ..... ..................•••...............
125
volts
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
56
ohms
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.26
megohm
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8000
,.mhos
Grid-No.1 Voltage (Approx.) for transconductance of 50 ,.mhos. . . . . ......
-19
volts
Grid No.1 Voltage (Approx.) lor transconductance 01 700 ,.mhos and
volts
-4.5
cathode resistor of 0 ohms ........................................ .
14
ma
Plate Current ...................................................... .
3.6
rna
Grid-No.2 Current ................................................. .
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ....................................... .
• The de component must not exceed 100 volts.
0.25 max
1.0 max
AVERAGE CHARACTERISTICS
It.
0
1
-0.'';-
d-
-o.•
-0.7~
GRID-HO, VOLTS ECI=-i-
It.
It.
1-o
198
.0
-
-- '-100
'"0
-r - -
-
200
PLATE VOLTS
- -
-.
-4
-. -.
--:'1
-'0
-,
-l
. .0
lOO
-
,.0
400
megohm
megohm
========= Technical Data ========--MEDIUM-MU TWIN TRIODE
Miniature type used in directcoupled cathode-drive rf amplifier circuits of vhf television tuners. In such
Related type:
circuits, one triode unit is used as the
4BZ7
PTz
direct-coupled grounded-cathode driver for the other unit. This type is also used in push"pull cathode-drive rf amplifiers.
Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket
and may be mounted in any position. For typical operation as a resistance-coupled
amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION. Heater
volts (acjdc), 6.3; amperes, 0.4.
6BZ7
CLASS A, AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Center Values):
volts
watts
rna
250"max
2.0 max
20 max
PLATE VOLTAGE .•..•..•.....•.•.•.•.......•.••.....•.•.•••.....••.••
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CATHODE CURRENT ••.............•.....••.•...••••.••••.•..•..••...•
PEAK HEATER-CATHODE VOLTAGE:
volts
Heater negative with respect to cathode .......... " ................ .
volts
Heater positive with respect to cathode ............................ .
• In cathode-drive circuits with direct-coupled drive, it is permissible for this voltage to be as high a.
300 volts under cutoff conditions .
• The dc component must not exceed 100 volts.
Characteristics:
Plate Supply Voltage ............................................... .
Cathode-Bias Resistor .............................................. .
Amplification Factor ................................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance .....................................•.............
Plate Current ...............................................•..•....
Grid Voltage (Approx.) for plate current of 100 I'a ...................... .
volts
ohms
150
220
36
5300
6800
10
ohm.
"mhos
rna
volt.
-7
Maximum Circuit Value:
0.6 max
Grid-Circuit Resistance .••••........•.•.•.•...•.....••...•...........
AVERAGE
megohm
CHARACTERISTICS
EA.CH UNIT
40
TYPE
I
6BZ7
E.f = 6.3 VOLTS
r--'?j
.::;
30
w
..
":3
. 'l '
/In,
1~5 / /
'/ II ~ / / VT 7
fj / / II / I / / )!l ~
'I VI / II / V'/ ~/'o
/~>~
71
')'
20
i
10
0
7'/
V, ~ ~ ~ ~ ~~~
100
200
300
400
500
PI.ATE VOLTS
600
700
UCM -U31T
MEDIUM-MU TWIN TRIODE
Miniature type used in direct-coupled, cathode-drive, rf amplifier circuits in vhf television
tuners. In such circuits, one triode unit is used
as the direct-coupled, grounded-cathode driver
for the other unit. Outline SB, OUTLINES SECTION. Tube requires miniature nine-contact
socket. Heater volts (ac Ide), 6.3; amperes, 0.4.
Characteristics a. cia•• Al amplifier (each unit):
plate supply volts, 125 (250 max); cathode-bias
6BZ8
199
RCA Receiving Tube Manual
resistor, 100 ohms; amplification factor, 45; plate resistance (approx.), 5600 ohms; transconductance,
SOOO /'mhos; plate rna., 10; cathode rna .• 20 max; plate dissipation. 2.2 max watts; peak heater-cathode
volts, 200 max. Type 6BZS is used principally for renewal purposes.
POWER TRIODE
~p
Miniature type used in compact H 3 4
5
6 G
radio equipment as a local oscillator
in FM and other high-frequency cir- Ie Z
7 K
cuits. It may also be used as a class C
rf amplifier. In such service, it delivers
p I
a power output of 5.5 watts at moderate frequencies, and 2.5 watts at 150 megacycles per second. Outline 7B, OUTLINES SECTION. Tube requires miniature
seven-contact socket and may be mounted in any position. For typical operation
as a resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION. For additional curve of plate characteristics, refer to type
12AU7-A.
6C4
HEATER VOLTAGE (AC/DC) .........................••.................
HEATER CURRENT .................................................. .
Without
External
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Shield
Grid to Plate ...................................... .
1.6
Grid to Cathode and Heater ......................... .
I.S
Plate to Cathode and Heater ........................ .
1.3
• With external shield connected to cathode.
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . .. . •. .• . .. . . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION. .................................................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . . .. . .
Heater positive with respect to cathode. . . • . . . . . . . . . . . . . . . . . . . . . . . . .
6.3
0.16
With
External
Shield·
1.4
1.S
2.5
volts
ampere
pf
pC
pC
300 max
3.5 max
volts
watts
200 max
200_max
volts
volts
Characteristics:
Plate Voltage. . • . . . . . . . . . . . . . . . . . . . . . ..• . . . . . • . . . . . . . . . .
100
250
volts
Grid Voltage"........ •..............•.............•....
0
-S.6
volts
Amplification Factor. . . . . . . . . . . . . . . . . . . . . . . . .. . . .. . . . . . . .
19.5
17
Plate'Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6250
7700
ohms
Transconductance. ................. ....................
3100
2200
/'mhos
Plate Current. ..........................................
11.S
10.5
rna
Grid Voltage (Approx.) for plate current of 10 /,a' ...... , ....
-10
-25
volts
* Transformer- or impedance-type input coupling devices are recommended to minimize resistance in
the grid circuit.
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
For cathode-bias operation ................................. , . . . . . .
- The dc component must not exceed 100 volts.
0.25 max
1. 0 max
160'r-__~__- r__~__~A~V~E~R~A~G~E~P~L~A~T~E~C~H~A~R~A~C~T~E~R~1~S~T~IC,S~__r-__, -__-r__- ,
TVP[ 6C4
Ef=6.3 VOL1S
200
megohm
megohm
========-- Technical Data ========-RF POWER AMPLIFIER AND OSCillATOR-Class C Telegraphy
Maximum Ratings, (Design-Center Values):
PI.ATE VOI.TAG",. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
300 max
volt.
GUID VOLTAGE. .. . ..................................................
-50 max
volts
PLATE CURRENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . .
25 max
ma
GRID CURUENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8 max
rna
PLATE DISSII'ATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 mnx
watts
Typical Operation at frequencies up to 50 Me:
Plate Voltage. . . . . . . . . . . . .. """.....................................
300
volts
Grid Voltage .............. "
...................................
-27
volts
Plate Current ............. "
.. .. .. ... . .. . .. .. . .. . .. ... . .. .. . .. .
25
rna
Grid Current (Approx.) ...... " " .. ' . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7
rna
Driving Power (Appro •. ) . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . .. . . . . . . . . . .
0" 35
watt
Power Output (Appro •. )-.. . .........................................
5.5
watts
- Approximately 2.5 watts power output can be obtained when the 6C4 is used at 150 megacycles as
an oscillator with grid resistor of 10,000 ohms and with maxlmum rated input.
co
~
MEDIUM-MU TRIODE
Metal type 6C5 and glass octal type 6C5-GT
P3
used as audio amplifier, oscillator, or detector
tubes. Outlines 3 and 24, respectively, OUTLINES SECTION. Tubes require octal socket.
H 2
7. H
Heater volts (ac Ide), 6.3; amperes, 0.3. Typical
operation as class Aj amplifier: plate volts, 250
I
8
(300 max); grid volts, -8 (0 max); amplification
S:6C5
K
BC:6CS·C;T
factor, 20; plate resistance, 10000 ohms; transconductance, 2000 "mhos; plate rna., 8; plate
dissipation, 2.5 max watts. Type 6C5-GT is a DISCONTINUED type listed for reference only. Type
6C5 is used principally for renewal purpose••
6C5
6C5GT
SHARP-CUTOFF PENTODE
co2 3
Glass type used as biased detector and as a
high-gain amplifier in radio equipment. Outline
24A, OUTLINES SECTION. Tube requires sixcontact socket. Heater volta (ae/de), 6.3; am·
peres, 0.3. For ratings and typical operation
data, refer to type 6J7. Type 6C6 is used principally for renewal purposes.
6C6
TWIN DIODEMEDIUM-MU TRIODE
Glass type used as combined detector. am·
plifier, and ave tube. Outline 24B, OUTLINES
SECTION. Heater volts (ae/de), 6.3; amperes,
0.3. This type is similar to, but not interchangeable with, type 85. The 6C7 is a DISCONTINUED type listed for reference only.
6C7
MEDIUM-MU TWIN TRIODE
Glass octal type used as a voltage amplifier
and phase inverter in radio equipment. Outline
23, OUTLINES SECTION. Tube requires
octal socket. Heater volts (ac/de), 6.3; amperes,
0.3. Maximum ratings for each triode unit as
class Al amplifier: plate volts, 250 max; grid
volts, positive-bias 'yalue, 0 max; plate dissipation, 1.0 max watt'. Typical operation: plate
volts, 250; grid volts, -4.5; plate rna., 3.2; plate
resistance, 22500 ohms; amplification factor, 36; transconductance, 1600 "mhos. This type is used principally for renewal purposes.
6C8 G
H
SH
4
KTRI
b
~ITRI SHARP-CUTOFF DUAL TETRODE
Miniature type used as vhf rf-amplifier and autodyne mixer tube. Outline SB, OUTLINES SECTION, exRelated type:
cept center pin is added to base. Tube
17C9
KTR2,IS
requires miniature ten-contact socket
and may be mounted in any position. Heater volts Cae/de), 6.3; amperes, 0.4.
6C9
201
RCA Receiving Tube Manual
CLASS Al AMPLIFIER (Earh Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ...
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE.
GRID-No.2 VOLTAGE.
CATHODE CURRENT ..... .
PLATE DISSIPATION:
Either plate.
Both plates (both units operating) ....
GRID-No.2 INPUT:
For grid-No.2 voltages up to 90 volts ...
For grid-No.2 voltages between 90 and 180 volts.
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....
Heater positive with respect to cathode.
250 max
volts
180 max
volts
See curve page 70
20 max
rna
1. 5 max
2.5 ma",
watts
watts
0.6 max
watt
See curve page 70
100 max
100 rna",
volts
volts
Characteristics:
Plate Voltage ....
Grid-No.2 Voltage .. .
Grid-No.1 Voltage ... .
Plate Resistance (Approx.) ..
Transconductance. .
. ............. .
Plate Current.. . . . . .
. ............ .
Grid-No.2 Current. . . . . ..
. .............. .
Grid-No.1 Voltage (Approx.) for plate current of 20 "a .. .
125
80
-1
0.1
8000
10
1.5
-6
volts
volts
volt
megohm
"mhos
rna
rna
volts
FULL.WAVE VACUUM RECTIFIER
Miniature type used in power- K
supply of compact, audio equipment
having moderate dc requirements. Outline 8E, OUTLINES SECTION. Tube
requires miniature nine-contact socket
POI
He
and may be mounted in any position. It is especially important that this tube; like
other power-handling tubes, be adequately ventilated. Heater volts (ac/dc), 6.3;
amperes, 1.
6CA4
FULL·WAVE RECTIFIER
Maximum Ratings, (Design-Center Values):
PEAK INVERSE PLATE VOLTAGE . .. '
................................•
PEAK PLATE CURRENT (Per Plate) ................................... .
AC PLATE SUPPLY VOLTAGE (Per Plate, rms) with Capacitor Input to Filter
-
OPERATION CHARACTERISTICS
FULL WAVE CIRCUIT
I
~
I
I
TYPE bCA4
CAPACITOR INPUT TO F'ILTER
II
I
E.,.a6.3 VOL.TS
SUPPLY FREQUENCY
r
lcps)=t.o
CAPACITOR INPUT TO FILTEA' &01'''
r
~ TOTA~ EH£CTIV~~;:;~-:~P:~V ~"P£DANC£
PER PLATE
OHMS
I-
150 2002040
0
0
~
o~~,.~
o
_,--
c
~~ ~~~l4;;-s.
000;;;;
-A
0
0
o
so
100
110
OC LOAD MILLIAMPERES
200
no
'ZCS-I031,TI
202
1000 max
450 max
350 max
volts
rna
volts
========= Technical Data =========
DC OUTPUT CURRENT .............................................. .
HOT SWITCHING TRANSIENT PLATE CURRENT (Per Plate) ................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode . ..... .
150 max
rna
#
500 max
volts
Typical Operation with Capacitor Input to Filter:
AC Plate-to-Plate Supply Voltage (rms) .......... .
500
600
700
volts
50
Filter-Input Capacitor ......................... .
50
50
"f
240
200
Total Effective Plate Supply Impedance per Plate ..
ohms
150
DC Output Voltage at Input to Filter (Approx.)
For dc output current of 150 rna... .
245
293
347
volts
# When capacitor-input circuits are used, a maximum peak current value per plate of 1 ampere during
the initial cycles of the hot-switching transient should not be exceeded.
BEAM POWER TUBE
Miniature type used in· af power
output stage of radio and television
receivers. Outline 7C, OUTLINES
SECTION. Tube requires miniature
seven-contact socket and may be operated in any position. Heater volts
(ac/dc), 6.3; amperes, 1.2.
6CA5
Related types:
12CA5,25CA5
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ......................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ........................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ......... .
PLATE DISSIPATION ........................................... .
GRID-No.2 INPUT ................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) . . . . . . . . . .
. ............ .
130 max
130 max
o max
5 max
1.4 max
volts
volts
volts
watts
watts
200 max
2000 max
180 max
volts
volts
°C
Typical Operation:
plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 (Control-Grid) Voltage ............. .
Peak AF Grid-No.1 Voltage ............................. .
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current (Approx.) .................. .
Maximum-Signal Grid-No.2 Current (Approx.) ............. .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Load Resistance . ...................................... .
Total Harmonic Distortion .............................. .
Maximum-Signal Power Output .......................... .
110
110
-4
4
32
31
3.5
7.5
16000
8100
3500
5
1.1
125
125
-4.5
4.5
37
36
4
11
15000
9200
4500
6
1.5
volts
volts
volts
volts
rna
rna
rna
rna
ohms
"mhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation . ........................................ .
For cathode-bias operation ...................................... .
° The dc component must not exceed 100 volts.
'
~3
~
4
P
0.1 max
0.5 max
megohm
megohm
BEAM POWER TUBE
S GI
~
Glass octal types used as hori6CB5
zontal deflection amplifiers in color
H2
7H
television receivers. Type 6CB5-A,
I
e
Outline 25A, OUTLINES SECTION.
G2
Gz
Type 6CB5 maximum dimensions:
over-all length, 5-1/8 inches; seated height, 4-19/32 inches; diameter, 2-1/16 inches.
Tubes require octal socket and may be mounted in any position. Type 6CB5 is a
DISCONTINUED type listed for reference only.
3
___
6
HEATER VOLTAGE (ACjnc) ... : ....................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ....... " ................... " ................ .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ............ .
Plate to Cathode, Heater, Grid No.2. and Grid No.3 ................. .
6CB5A
6.3
2.5
amperes
volt.
0.4
22
10
pf
pf
pf
203
RCA Receiving Tllbe Manual
~mh09
TRANSCONDUCTANCE*. • • • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . • . . . . .
8800
Mu-FACTOR, Grid No.2 to Grid No.l*.................................
3.8
*For plate and grid-No.2 volts, 175; grid-No.1 volts, -30; plate rna., 90; grid-No.2 rna., 6.
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 525-line, 30-frame sUBtem
6CB5
Design-Center
Vallus A
Maximum Ratings:
DC PLATE VOLTAGE ................................. .
700 max
6800 0 max
PEAK POSITIVE-PULSE PLATE VOLTAGE# ................ .
-1500 max
PEAK NEGATIVE-PULSE PLATE VOLTAGE ................ .
200 max
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ................ .
-50 max
DC GRID-No.1 (CONTROL-GRID) VOLTAGE ............... .
-200 max
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ........... .
PEAK CATHODE CURRENT .......................... .
- max
200 max
AVERAGE CATHODE CURRENT ................ '" ..... .
3.6 max
GRID-No.2 INPUT ................................... .
PLATE DISSIPATIONt ................................. .
23 max
PEAK HEATER-CATHODE VOLTAGE:
200 max
Heater negative with respect to cathode ............. .
200·max
Heater positive with respect to cathode ............. .
210 max
BULB TEMPERATURE (At hottest point) ............. .
6CB5-A
Design-Maximum
Values
880 max
6800 max
-1650 max
220 max
-55 max
-220 max
850 max
240 max
4 max
26 max
200 max
200-max
220 max
volts
volt.
volts
volts
volts
volts
rna
rna
watts
watts
volts
volts
°C
Maximum Circuit Value:
0.47 max megohm
Grid-No.1-Circuit Resistance .•••••...............•..•...•.•...•.•...•
, Except as noted.
# The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line. 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microsecond ••
o Absolu.te-Maximum Value. Under no circumstances should this absolute value be exceeded.
t An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
- The dc component must not exceed 100 volts.
~4
H3::: 6G2
SHARP-CUTOFF PENTODE
5 p
Miniature types used in television
receivers as intermediate-frequency
amplifier at frequencies up to about 45
K 2
7 G3
Related types:
megacycles per second and as rf amI
IS
3CI6,4CI6
plifier in vhf television tuners. Tubes
GI
feature very high transconductance combined with low interelectrode capacitance
values, and are provided with separate base pins for grid No.3 and the cathode to
permit the use of an unbypassed cathode resistor to minimize the effects of regeneration. Type 6CB6-A has a controlled heater warm-up time for use in television receivers employing series-connected heater strings. Outline 7B, OUTLINES SECTION. Tubes require miniature seven-contact socket and may be mounted in any
position. For typical operation as a resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION.
6CB6
6CB6A
HEATER VOLTS (AC/DC) ••.•......•.......•........•................•.•.
6.3
HEATER CURRENT ...............................................•.....
0.3
HEATER WARM-UP TIME (Average) for 6CB6-A. . . . . . . . . . .
. ........... .
11
Without
With
External
External
DIRECT INTER ELECTRODE CAPACITANCES:
Shield
Shield'
Grid No.1 to Plate ............................. .
0.025 max 0.015 max
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3,
and Internal Shield ..................... " ........ .
6.5
6.5
Plate to Cathode, Heater, Grid No.2, Grid No.3, and
Internal Shield ................................... .
3
2
, With external shield connected to cathode.
volts
ampere
seconds
pf
pf
pf
CLASS AI AMPLIFIER
Maximum Ratings, (De8ign-Maximum Values):
PLATE VOLTAGE •...•.•..•..........................•............•.•...
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value ................. .
GBID-No.2 (SCREEN-GRID) VOLTAGE ..•.................•.................
GRID-No.2 SUPPLY VOLTAGE ..... '" ................................... .
GRID-No. I(CONTROL-GRID) VOLTAGE, Positive-bias value .................. .
PLATE DISSIPATION .................................•.........•........
GRID-No.2 INPUT:
.
For grid-No.2 voltages up to 165 volts .........................•.•....
For grid-No.2 voltages between 165 and 330 volts ...•.......•..........
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode •••.••.•.•.•.•..•.•.•.•.......
Heater positive with respect to cathode ............................. ..
204
330 max
volts
o max
volts
See curve page 70
330 max
volts
o max
volts
2.3 max
watts
0.55 max
watt
See curve page 70
200 max
2000 max
volts
vol ts
========= Technical Data =========
Cha ra deristies:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . .
125
volts
Grid No.3 ..................................................... Connected to cathode at socket
Grid-No.2 Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
volts
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
56
ohms
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.28
megohm
Transconductance. . . .. .. . . . .. .. . .. .. .. . . .. . . . .. .. .. .. . .. .. .. .. .. . .. . ..
8000
I'mhos
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a.....................
-6.5
volt.
Grid-N 0.1 Voltage (Approx.) for plate current of 2.8 rna and cathode-hi as
resistor of 0 ohms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-3
volts
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
rna
Grid-No.2 Current....................................................
3.7
rna
° The dc component must not exceed 100 volts.
AVERAGE CHARACTERISTICS
"~ 3 ~ -
.
TYP~ 6CB~-A ~ ... =•• ~ VOCT~
C;R~O~::C~~~ ~~T~~~~~D~H!~L~OCKET.
GAID-NAZ VOLTS= 125
:IE
~
I
I
30
I
d
:IE
NZ
S
u
~
:tz
20
_\ /'
\ I
I~
I{
A.
I
"
S
~
..
..
~
'"
!(
oJ
£CI=O
-O.~
-I
-I.~
\
0
S
GoRID-Nal VOLTS
Ib
'50
'-
XCZ
-21
ECI=O
-.
-2.~
Ib
100
I!lD
zoo
250
300
350
-3.5_ 4
400
PLATE VOLTS
92CM-98504TI
BEAM POWER TUBE
Glass octal types used as horizon6CD6G
tal deflection amplifiers in high-efficiency deflection circuits of television
R.lated type:
receivers employing either transformer
25CD6GB
C;2
coupling or direct coupling to the deflection yoke. Type 6CD6-GA, Outline 25A, OUTLINES SECTION. Tubes require octal socket. Type 6CD6-GA may be supplied with pins 1, 4, and 6 omitted.
Vertical tube mounting is preferred but horizontal operation is permissible if pins
No.2 and 7 are in vertical plane. Type 6CD6-G has a maximum peak positivepulse plate-voltage rating (Absolute Maximum) of 6600 volts, a maximum platedissipation rating of 15 watts, and a maximum bulb-temperature rating (at hottest
point) of 210°C. Type 6CD6-G is a DISCONTINUED type listed for reference only.
6CD6GA
HEATER VOLTAGE tAC/DC)..............................................
HEATER CURRENT.....................................................
DIRECT INTER ELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ........................ ;........................ .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3...............
Plate to Cathode, Heater, Grid No.2, and Grid No.3...................
TRANSCONDUCTANCEo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLATE RESISTANCE (ADprox.)o. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mu-FACTOR, Grid No.2 to Grid No.1°...................................
"For plate and grid-No.2 volts, 175; grid-No.1 volts, -30; plate rna., 75; grid-No.2
6.3
2.5
1.1
22
8.5
7700
7200
3.9
rna., 5.5.
volt.
amperes
pf
pf
pf
~mho8
ohms
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 5fl5-line, !lO-frame sllstem
Maximum Ratings, (Design-Center Values):
700 max
DC PLATE VOLTAGE .................................................. .
PEAK POSITIVE-PULSE PLATE VOLTAGE" (Absolute Maximum) . ............. .
7000-max
PEAK NEGATIVE-PULSE PLATE VOLTAGE ................................ . -1500 max
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ..•..••..........................
175 max
-200 max
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ..... " .................. " ..
700 max
PEAK CATHODE CURRENT ............................................. .
AVERAGE CATHODE CURRENT .......................................... .
200 max
volts
volt.
volts
volts
volts
rna
rna
205
RCA Receiving Tllbe Manllal
PLATE DISSIPATIONt .................................................. .
GRID-No.2 INPUT .................................................... .
PEAK HEATER.CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ ..
Heater positive with respect to cathode .............................. .
BULB TEMPERATURE (At hottest point) ................................. .
20 max
3 max
watts
watts
200 max
200 max
225 max
volts
volts
0
·C
Maximum Circuit Value:
Grid-No.1-Circuit Resistance:
For grid-resistor-bias operation.
..........................
0.47 max megohm
• The duration of the voltage pulse must not exceed 1'5 per cent of one horizontal scanning cycle. In
a 525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• Under no circumstances should this absolute value be exceeded.
t An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
o The de component must not exceed 100 volts.
AVERAGE CHARACTERISTICS
600
TYPE 6CD6-GA
[".=8.3 VOLTS
GRID-H_' VOlTS=O
EC2.!~
600
I
~
!!
.
....
V
a:
L
:1400
f-
0(
::l
~
.J
..
'i
~
.J
0. 200
-
'l~-
-
-
l2.~
~S
200~
..
~
L2.- IOO
GftIO-HeZ. VO\,.:
150 ~
-
,.," r--~ '!\> -.
'fA ---:'""-~~\-~~--- --- ---- --- --~
L
:I
7&
100
b
&0
,~
.:.:,-
o
~
--_£~:!~
200
I 00
&0
IU
100
0
300
400
PLATE VOLTS
~
,.S
~
92.CII·tolaT
"VERAGE CH"R"CTERI STieS
800
TYPE 6CD6-G"
[F=I.3 VOLTS
GRID-Na2 VOLTS=ITS
.~
..
600 -
/
I
a:
L
"....-
:I
:!400
~
.
---
_~I
-
.&
;!!--
'tS t.e
..- ~~\.---
f --
:I
!(
f..
i!
200
=. .,0
~oo~
....
ISO ~
.\&
L
~
-20
100
\
I
0
r
~~
-- ----- ---:'f!- ---
-30
N
~O
.L£I=O
~--
30
100
200
0
300
400
PLAT[ VOLTS
Related type:
3eu
206
!
~
&00
SHARP-CUTOFF PENTODE
6CE5
3~
:I
Miniature type used as rf and if
amplifier in vhf television receivers
employing series-connected heater
strings. Outline 7B, OUTLINES SEC·
TION. Tube requires miniature seven·
contact socket and may be operated
in any position.
dCII-lOIn
4
~p
~
H3
bG:!
:~:
K
G32
IS
---
GI
I
K
7 G3
IS
========= Technical Data========-HEATER VOLTS (ACjnc) ............................................. .
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (Average) .......................... .
DIRECT INTER ELECTRODE CAPACITANCES:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2,
Grid No.3, and Internal Shield ........................... .
Plate to Cathode, Heater, Grid No.2,
Grid No.3, and Internal Shield ............................... .
6.3
0.3
11
volts
ampere
seconds
pC
0.03 max
6.5
pf
1.9
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Cenler Values):
PLATE VOLTAGE ............................................. .
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
GRID-N 0.2 INPUT .................................................. .
PLATE DISSIPATION ................................. " .............. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
• The dc component must not exceed 100 volts.
Characteristics:
Plate Voltage ...................................................... .
Grid-No.2 Voltage .................................................. .
Grid-No.1 Supply Voltage ........................................... .
Grid-N 0.1 Resistor (Bypassed) ....................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Grid-No.1 Voltage (Approx.) for plate current of 35 I'a ........... , ...... .
Plate Current ...................................................... .
Grid-N 0.2 Current ................................................. .
4
~
5 P
300 max
150 max
o max
0.5max
2 max
volts
volts
volts
watt
watts
200 max
200·max
volts
volts
125
125
-1
1
0.3
7600
-5
volts
volts
volt
megohm
megohm
~mho8
volts
rna
rna
11
2.3
SHARP-CUTOFF PENTODE
Miniature type used in television
receivers as an intermediate-frequency
K 2
7 G3
amplifier at frequencies up to about 45
Related type:
IS
megacycles per second .and aa an rf
3CF6
G.'
amplifier in vhf television tuners. Because of its plate-current cutoff characteristic, this type is used in gain-controlled
stages of video if amplifiers. This type is electrically similar to miniature type
6CB6. Outline 7B, OUTLINES SECTION. Heater volts (acjdc), 6.3; amperes, 0.3.
H 3
___
6 G2
6CF6
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . •. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid No.3...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. .. Connected
Grid-No.2 Supply Voltage ................................... '" .... ..
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . .. . .. . .. . .. . .. . .. . . . . .. . . . . . . . . . . .. . . . . .. . .. . . . . .
Grid-No 1 Voltage (Approx.) for plate current of 20 I'a ............. '" . "
Grid-N 0.1 Voltage (Approx.) for plate current of 2.2 rna and cathode-bias
resistor of 0 ohms ................................................ .
Plate Current ...................................................... .
Grid No.2 Current ................................................. .
125
volts
to cathode at socket
125
volts
56
ohms
0.3
megohm
7800
I'mhos
-6
volts
-3
12.5
3.7
volts
rna
rna
MEDIUM-MU TWIN TRIODE
Miniature type used as combined
vertical deflection and horizontal deflection oscillator in television reRelated type:
ceivers. Also used as phase inverter,
aCG7
PT2
sync separator and amplifier, and resistance-coupled amplifier in radio receivers. This type has a controlled heater
warm-up time for use in receivers employing series-connected heater strings. Except
for . the common heater, each triode unit is independent of the other. Outline 8D,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position. For typical operation as a resistance-coupled amplifier,
refer to RESISTANCE-COUPLED AMPLIFIER SECTION.
6CG7
HEATER VOLTAGE (ACjnc) ........................................... .
HEATER CURRENT .................................................. .
6.3
0.6
volts
ampere
207
RCA Receiving Tllbe Manllal
HEATER WARM-UP TIME (A verage) ........................•...........
DIRECT INTERELECTRODE CAPACITANCES (Each Unit, Appro •. ):
Grid to Plate ................................................... .
Grid to Cathode, Heater, and Internal Shield ....................... .
Plate to Cathode, Hpater, and Internal Shield ................... .
11
seconds
4.0
2.3
2.2
pf
pI
pf
CLASS AI AMPLIFIER (Each Uni/)
Maximum Ralings, (De8ign-Maximum Values):
PLATE VOLTAGE .....•...............................................
GIUD VOLTAGE, Positive-bias value ...................... , ............ .
PLATE DISSIPATION:
For either plate ................................................. .
For both plates with both units operating .......................... .
CATHODE CURRENT ................................................. .
PEAK HEATER,CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ...... " ...... .
330 max
o max
volts
volts
4 max
5.7 max
22 max
watts
watts
rna
200 max
200 8 /nax
volts
volts
Characteristics:
Plate Vol tage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid Voltage ............... '" ......... ..........••.
Amplification Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid Voltage (Approx.) lor plate current 01 10 I'a. . . . . . . . .
~::~: 8~~~:~~.I~~.~r.i~.~~lt~g~.~I. :.~~:5 vo.I~~ ...... ::::::::::
90
0
20
6700
3000
-7
10
250
-8
20
7700
2600
-18
1.3
9
volts
volts
ohms
~mhos
volts
rna
rna
Maximum Circuit Value:
Grid-Circuit Resistance:
For fixed-bias operation .......................................... .
• The de component must not exceed 100 volts.
1.0 max
megohm
AVERAGE PLATE CHARACTERISTtCS
'OR EACH UNIT
TYPE 8CG7
IE.,- •.~ VOLT.
a
.0
.,,?
•
I.
I
f
~
I
;"I ,-,
III IV
::I
~
,"'I
Ij
-''I ,J!
/ / f' ~Iy
L / 1/1/ / / // ~~.
1/ I
t
o
~ ~ ~ ~ ~ ~ ~ ~ ~ soo
100
200
300
400
PL.ATE. VOL.TS
OSCILLATOR
For operation in a 525-line, 30-frame s1lstem
Vertical
Deflection
Maximum Ratings, (Design-Maximum Values, Each Unit):
08cillator
330 max
DC PLATE VOLTAGE .................................•
-440 max
PEAK NEGATIVE-PULSE GRID VOLTAGE ...........•......
77 max
PEAK CATHODE CURRENT ............................•
22 max
AVERAGE CATHODE CURRENT ......................... .
PI.ATE DISSIPATION:
4 max
For either plate .................................. .
5.7 max
For both plates with both units operating .•.........•
PEAK HEATER-CATHODE VOLTAGE:
200 max
Heater npgative with respect to cathode ............. .
200·max
Heater positive with respect to cathode .....••.......
Horizontal
Deflection
Oscillator
330 max
-660 max
330 max
22 max
volts
volts
rna
rna
4 max
5.7 max
watts
watts
200 max
200·max
volts
volts
2.2 max
megohms
Maximum Circuit Value:
Grid-Circuit Resistance .............•...•....•.•.....•
• The dc component must not exceed 100 volts.
208
2.2 max
----------------- Technical Data ----------------MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
6CG8
Miniature types used as combined
oscillator and mixer tubes in television
receivers utilizing an intermediate freRelated type:
quency in the order of 40 megacycles
5CGB
per second. When used in an AM/FM
receiver, the triode unit is used as an oscillator for both sections. In the AM section,
the pentode unit is used as a high-gain pentode mixer; in the FM section, the
pentode unit is used either as a pentode mixer or as a triode-connected mixer depending on signal-to-noise considerations. Type 6CG8-A has a controlled heater
warm-up time for use in television receivers employing series-connected heater
strings. Outline 8B, OUTLINES SECTION. Tubes require miniature nine-contact
socket and may be mounted in any position. Heater volts (ac/dc), 6.3; amperes,
0.45; warm-up time (average) for 6CG8-A, 11 seconds. Maximum ratings, characteristics, and typical operating values are the same as those of miniature type
6X8. For curves of average characteristics, see type 6X8. The 6CG8 is a DISCONTINUED type listed for reference only.
6CG8A
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate .................................... .
Grid to Cathode, Heater, and Pentode Grid No.3 •.....
Plate to Cathode, Heater, and Pentode Grid No.3 .. '"
Pentode Unit:
Grid No.1 to Plate ............................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3
Plate to Cathode, Heater, Grid No.2, and Grid No.3 .. .
Pentode Grid No.1 to Triode Plate .................... .
Pentode Plate to Triode Plate ......................... .
Heater to Cathode ................................... .
o With external shield connected to cathode, except as noted.
-With external shield connected to plate.
Without
External
Shield
With
External
Shield"
1.5
1.5
2
0.5
0.04 max
4.6
0.9
0.05 max
0.05 max
6.5
pf
pf
pf
2.4
1
0.02 max
4.8
pf
pf
pf
pf
pf
pf
1.6
0.04 max
0.008 max
6.5·
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in television
receivers. The pentode unit is used as
an if amplifier, video amplifier, age
KT
PT
amplifier, or reactance tube.The triode
unit is used in low-frequency oscillator, sync-separator, sync-clipper, and phasesplitter circuits. Outline 8B, OU'fLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. For curves of average
plate characteristics, refer to type 6AN8. The pentode-unit curve for the 6AN8
applies for this type except that grid No.3, heater, and internal shield (pin 5) are
connected to ground.
6CH 8
HEATER VOLTAGE (AC/OO) ••..•.••••••••••••••.••..•.••••..•••...••.••
HEATER CURRENT •.•....•••......•.............•...• '" ..•.....•....
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate .................................................. .
Grid to Cathode, Heater, Pentode Grid No.3, and Internal Shield .... .
Plate to Cathode, Heater, Pentode Grid No.3, and Internal Shield .... .
Pentode Unit:
Grid No.1 to Plate ............................................. .
GridNo.1 to Cathode, Heater,GridNo.2,Grid No.3,andInternal Shield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ..
Triode Grid to Pentode Plate ........................................ .
Pentode Grid No.1 to Triode Plate ................................... .
Pentode Plate to Triode Plate ....................................... .
6.3
0.45
volts
ampere
1.6
1.9
1.6
pf
pf
pf
0.026
7
2.25
0.005
0.02
0.04
pf
pf
pf
pf
pf
pf
209
RCA Receiving Tube Manllal
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ........................................ .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value .. .
GRID-No.2 SUPPLY VOLTAGE ............................. .
GRID-No.2 (SCREEN-GRID) VOLTAGE ...................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DIS~IPATION .................................... .
GRID-N 0.2 INPUT:
For grid-No.2 voltages up to 150 volts ................ .
For grid-No 2 voltages between 150 and 300 volts ...... .
P"'AK HFJATER-CA1'HODE VOLTAGE:
Heater negative with respect to cathode .... , ..
Heater positive with respect to cathode. . .
. ........ .
Triode Unit
300 max
o max
2.6 max
Pentode Unit
300 max
volts
o max
volts
300 max
volts
See curve page 70
o max
volts
2 max
watts
0.5 max
watt
See curve page 70
200 max
2000 max
'" max
o max
volts
volts
Characteristics:
Plate Supply Voltage. , ............................... .
Grid No.3 ............................................ .
Grid-No,2 Supply Voltage ............................... .
Grid Voltage .......................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................... " .............. .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid-No.1 Voltage (Approx.) for plate current of 10"a ....... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
200
200
volts
-Connected to ground atsocket
150
volts
-6
volts
ISO
ohms
19
obms
5750
300000
",mhos
3300
6200
volts
-19
-S
rna
9.5
13
rna
2.S
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:*
0.25 max megohm
0.5 max
For fixed-bias operation ............................. .
1.0 max megohm
1.0 max
For cathode bias operation .......................... .
° The dc component must not exceed 100 volts .
• The heater-cathode voltage should not exceed the value of the operating cathode bias because the
voltage between the heater and cathode is also applied between the cathode and grid No.3. The net
result isto make grid No.3 negative with respect to cathode with possible change in tube characteristics.
* If either unit is operating at maximum rated conditions, grid No.1-circuit resistance for both units
should not exceed the stated values.
LOW-MU TRIODE
G~
Glass octal type used as a vertical-deflection-amplifier tube in television receivers. Out___ 5P
line I4E, OUTLINES SECTION. Tube requires
octal socket. Heater volts (ac Idc) , 6.3; amperes,
1.25. Characteristics as class Al amplifier: plate
2
7
volts, 250; grid volts, -28; plate rna., 40; amH
H
plification factor, 6.6; plate resistance (approx.),
1
6
1200 ohms; transconductance, 5500 I'mhos.
G
K
Maximum ratings as vertical deflection amplifier (for operation in a 525-line, 30-frame system): dc plate volts, 550 max; peak positive-pulse plate
volts, 2000 max; peak negative-pUlse grid volts, 250 max; peak cathode rna., 350 max; average cathode
rna., 100 max; plate dissipation, 12 max watts; peak heater-cathode volts, 200 max (the dc component
must not exceed 100 volts), This type is used principally for renewal purposes.
6CK4
H
POWER PENTODE
Miniature type used in output <:'2
stage of video amplifier of television
receivers and as wide-band amplifier
tube inindustrial and laboratory equipment. Outline SD. OUTLINES SECK
GI
TION. Tube requires miniature nine-contact socket and may be mounted in any
position.
6CL6
HEATER VOLTAGE (AC/nc) ......................................... " .
HEATER CURRENT ..... , ............................................ .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2. Grid No.3, and Internal Shield ....
6.3
0.65
volts
ampere
0.12
11
5.5
pf
pf
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
210
300 max
volts
========= Technic'al Data =========
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive Value ..
GRII>-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ...................... .
GRII>-No.2 VOLTAGE ................................................ .
GRII>-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value ............................................. .
Positive...bias value . ............................................. .
PLATE DISSIPATION ................................................. .
GRII>-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
BULB TEMPERATURE (At hottest point) ............................... .
o max
300 ma:<
150 max
volts
volt.
volt.
-50 max
o max
7.5ma:<
1. 7 max
volts
volts
watts
watts
100 max
100 ma:<
volts
volts
·C
200 max
Typical Opi!ration:
Plate Voltage. .. ...... ......... ............ ..... . .............. .....
250
volt.
Grid No.3 and Internal Shield ................................... Connected to cathode at socket
Grid-No.2 Voltage................... ..................... ...... .....
150
volt.
Grid-No.1 Voltage .............. " . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-3
volts
Peak AF Grid-No.1 Voltage.. .. .........•........ ... ........... ......
3
volt.
Zero-Signal Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . • .
30
rna
Maximum-Siltnal Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
rna
7
rna
Zero-Signal Grid-No.2 Current. . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maximum-Signal Grid-No.2 Current..................................
7.2
rna
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.09
megohm
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11000
"mhos
Grid-No.1 Voltage (Approx.) for plate current of 10 "a. ..................
-14
volts
Load Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7500
ohms
Total Harmonic Distortion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
per cent
Maximum-Signal Power Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.8
watts
Typical Operation in 4-Mc-Bandwidth Video Amplifier:
Plate Supply Voltage. ... ................... .................... .....
300
volts
Grid No.3 and Internal Shield ................................... Connected to cathode at socket
Grid-No.2 Supply Voltage. . .................. ...................... ..
300
volts
Grid-No.1 Bias Voltage. . . . . .........................................
-2
volts
Grid-No.1 Signal Voltage (Peak to Peak). ............ ..................
3
volts
Grid-No.2 Resistor .................. " .................... " . .. . . . . .
24000
ohm.
Grid-No.1 Resistor..................................................
0.1
megohm
Load Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3900
ohm.
Zero-Signal Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
rna
Zero-Signal Grid-No.2 Current.................... .....................
7.0
IDa
Voltage Output (Peak to Peak). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
132
volts
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ....................................... .
0.1 max
0.5 rna:<
megohm
megohm
AVERAGE CHARACTERISTICS
'6°rT~.---~~~~--r---'----r---'----r---~--------------------,
\
..
\
~
\
w
;.... '20
.\
Z'''7b
"'0: TYPE
C//~'Y""'::- +6 EC~
3 \ \ '(j /
~ -4~ hL_
-.-
.0
\
+4
~"
\
o
:;t40
\
I
~\ ' , -
, >\ .....~.. I' ........
/J'/
-,00
o
H
~ GR~~:~nVOLTS='SO
"a
10
'i--t--+---+---"1f---t
+,
b
~~\jl~\"~\~~+---+--rG::!R::.'O~-1N::.:..'V:. o: ;L1T~S:. ;E: ;C" =T°;. O~r --t--+---+---if--,
~
a:
6CL6
20
+2
,-\ ~,.:~,- Efl:+2
.t!..
i
..",E.. =6.3VOLTS
:trr - -.. . +-~--+---4----+----+-30 ~ GR~o~~:c~~g ~~T~~~~~D:H~;D
Ib
~~"
-~
+2
200
-,
I.
-2
I
L
-3
-4
SOO
MEDIUM-MU TRIODESHARP-CUTOFF TETRO DE
Miniature types used as combined
vhf oscillator and mixer in television
receivers employing series-connected
heater strings. Outline8B,OUTLINES
SECTION. Tubes require miniature
92C",-7102"
6CL8
6CL8A
Related typel:
SCLIA, 19CLIA
211
RCA Receiving Tube Manllal
nine-contact socket and may be mounted in any position. For maximum ratings
as class A, amplifier, see type 6U8-A. Type 6CL8 is a DISCONTINUED type
listed for reference only. Heater volts (acjdc), 6.3; amperes, 0.45; warm-up time
(average), 11 seconds.
CLASS A, AMPLIFIER
Characteristics:
Triode Uni'
1'etrode Unit
125
125
125
-1
volts
volts
volt
0.2
6500
-9
12
4
megohm
,umhos
volts
ma
ma
0.25 max
1 max
megohm
megohm
Plate Supply Voltage ............. .
Grid-No.2 (Screen-Grid) Voltage .. .
Grid-No.1 Voltage ......... .
Amplification Factor ... .
Plate Resistance (Approx.) ..
Transconductance.
.....
. ..... .
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a ... .
Plate Current ........... .
Grid-N 0.2 Current ........................... .
-1
40
0.005
8000
-9
14
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
0.5 max
1 niax
H
BEAM POWER TUBE
Miniature type used as vertical
deflection amplifier in television receivers and as audio power amplifier
in radio and television receivers. Outline 8D,OUTLINES SECTION. Tube
G2
p
requires miniature nine-contact socket and may be mounted in any position. For
typical operation and maximum circuit values as class Al amplifier, refer to type
6V6-GT. For curves of average plate characteristics, refer to type 6AQ5-A.
6CM6
HEATER VOLTAGE (AC/OC)..... ... ... .................................
HEATER CURRENT. ............................. .......... ...........
AMPLIFICATION FACTOR*.. . . . .. .. .. .. . . . . .. . . . . .. .. . . . . .. . . . . . . .. . . . . .
PLATE RESISTANCE (Approx.)*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TRANSCONDUCTANCE*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
* Grid No.2 connected to plate; plate and grid-No.2 volts, 250; grid-No.1 volts,
No.2 ma" 49.5.
6.3
volt.
0.45
ampere
9 .8
1960
ohms
5000
I'mhos
-12.5; plate and grid-
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................. " ................ .
GRID-No.2 (SCREEN-GRID) VOLTAGE ..... '" .......................... .
GRID-N 0.2 INPUT .................................................. .
PLATE DISSIPATION ... '" ..•.............................. '" .... " ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......................... .
Heater positive with respect to cathode ........................... .
VERTICAL DEFLECTION AMPLIFIER
For operation in a 51!5-line, 30-ftame system
Triode
Maximum Ratings, (Design-Center Values):
Connection°
DC PLATE VOLTAGE ..................................... .
315 max
PEAK POSITIVE-PULSE PLATE VOLTAGEt (Absolute Maximum) .. 2000'max
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ................... .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE.
PEAK CATHODE CURRENT ................................ .
AVERAGE CATHODE CURRENT ............................ .
PLATE DISSIPATION ..................................... .
GRID-No.2 INPUT ....................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ................ .
Heater positive with respect to cathode ................ .
-250 max
120 max
40 max
9 max
200 max
200-max
315 max
285 max
2 max
12 max
volts
volts
watts
watts
200 max
200-max
volts
volt.
Pentode
Connection
315 max
2000'max
285 max
-250 max
120 max
40 max
8 max
1.75 max
volts
volts
volt.
volts
rna
rna
watt.
watt.
200 max
200-max
volts
volts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max
2.2 max megohms
• Grid No.2 connected to plate.
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning eyde. In a 525line, SO-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds .
• Under no circumstances should this absolute value be exceeded.
- The de component must not exceed 100 volts.
212
=========-Technical Data
MEDIUM-MU DUAL TRIODE
Miniature type used as combined
vertical deflection oscillator and vertical
deflection amplifier in television recei vRelated type:
ers employing series-connected heater
ICM7
PT2
KT2
strings. Unit No.1 is used as a conventional blocking oscillator in vertical deflection circuits, and unit No.2 as a vertical
deflection amplifier. Outline 8D, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position.
6CM7
HEATER VOLTAGE (AC/nc) ...........................................•
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (Average) ................................... .
DIRECT INTERELF,cTRODE CAPACITANCES (Approx.):
Unit No.1
Grid to Plate .................................... .
3.8
Grid to Cathode and Heater ....................... .
2
Plate to Cathode and Heater ...................... .
0.5
6.3
0.6
11
Ultit No.1I
3
volts
ampere
seconds
pC
pC
pC
3.5
0.4
CLASS Al AMPLIFIER
Characteristics:
Plate Voltage ...................................... ..
Grid Voltage ........................................ .
Amplification Factor ................................. .
Plate Resistance (Approx.) ........................... .
Transconductance ................................... .
Grid Voltage (Approx.) for plate current of 10 lOa ........ .
Plate Current ....................................... .
Plate Current for grid voltage of -10 volts .............. .
Unit No.1
200
-7
21
10500
2000
-14
5
1
Unit No.%
250
-8
18
4100
4400
volt.
volt.
ohm.
~mho8
volt.
rna
rna
20
AVERAGE CHARACTERISTICS
UNIT Nil
00
TYH 5CM7
If'.
'.1
VOL'I
UNIT NI Z
..
0
..~7":> 7 ,.,
II '
r; II
i
~
::;
~I 0
•
~
J
il
/ II t .
)1 / I IIV} /
~
II I V.:
..
[I
0
...OUNDID
'~
1/
J
I'
'!,~rC-.
17 [7[7/ r7/ '/ [717/ [7/W~;)':~~
I~ k:: ~~ ~ ~ ~~ ~~-
o
100
200
100
.00
500
PLATE VOLTI
100
700
.lc.. • •• nT
VERTICAL DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 5115-line, SO-frame SI/stem
Unit No.1
Oscillator
550 max
DC PLATE VOLTAGE........ .........
. ............ .
PEAK POSITIVE-PULSE PLATE VOLTAGE #
PEAK NEGATIVE-PULSE GRID VOLTAGE ................. .
-220 max
PEAK CATHODE CURRENT .........................•...
77 max
17 max
AVERAGE CATHODE CURRENT ........................ .
PLATE DISSIPATION ..•...............................
1.45 max
PEAK HEATER-CATHODE VOLTAGE:
200 max
Heater negative with respect to cathode ........... .
Heater positive with respect to cathode ............ .
200'max
Maximum Ratings, (Design-Maximum Values):
U"U No.1I
Amplifier
550 max
2200 max
-220 max
77 max
22 max
6 max
volt.
volt.
volt.
rna
rna
watt.
200 max
200'max
volt.
volt.
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation .......................... .
2.2 max
1.0 max megohms
213
RCA Receiving Tllbe Manual
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . .
2.2 max
2.5 max megohms
For grid-resistor-bias operation. . . . . . . . . . . . . . . . . . .
2.2 max
megohms
The duration of the volt.age pulse must not exceed 15 per cent of one ver~ic!,1 scanning cycle. In a 525line, 30-frame system, 15 per cent of one vertical scanning cycle iR 2.5 mtlhseconrls .
• The de compnnent. must not exceed 100 vol ts.
~
AVERAGE CHARACTERISTICS
N.a
UNIT
0
';f
..,u(
TY'E 5CM7
T
t!
ry
~
40
'l
0
I
II
II
J
0
I
/
V
o
I
I
100
I
~
V
II
V
100
/ ~t
J
1./ " V V
100
f
I
/
II
/
~
I
/
0
1f'.'.1 VOLT•
UHIT HII G~OUHDID
./
/
I-
v::: V
400
?t-
'~..:»
~
soo
100
100
'LATE VOLTt
nell-IIIIT
H
HIGH-MU TRIODE-.
SHARP-CUTOFF PENTODE
Kp
Miniature type used in variety of ~;P 3
applications in television receivers. The
pentode unit is used as an intermediRelated type:
SCMI
ate-frequency-amplifier, a video-amplifier, an agc-amplifier, or as a reactance tube. The triode unit is used in sweep-oscillator, sync-separator, syn.e-clipper,
and phase-splitter circuits. Outline 8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket and may be mounted in any position. Heater volts
(ac/dc), 6.3; amperes, 0.45; warm-up time (average), 11 seconds.
6CM8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE ........... '" ...................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION .................... '" .............. .
GRID-No.2 INPUT:
For grid-No.2 voltage! up to 150 volts ................ .
For grid-No.2 voltages between 150 and 300 volts .... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Triode Unit Pentode Unit
300 ma·x
300 max
volt.
300 max
volt.
See curve page 70
o max
0 max
vol t.
1 max
2 max
watts
0.5 max
watt
See curve page 70
200 max
200-max
200 max
200-max
volt.
volts
250
250
150
volt.
volts
volt.
ohms
Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage .. '" .................. '" '" .. .
Grid Voltage .......................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a ...... .
Plate Current .......................................... .
Grid'No.2 Current ..................................... .
214
-2
100
0.05
2000
1.8
180
0.6
6200
-8
9.5
2.8
megohm
,,,mhos
volt.
rna
rna
;;;;;;;;;---------------- Technical Data ;;;;;;;;;---------------Maximum Circuit Values:
Triod. Unit Penlod. Unit
Grid-No.1-Circuit Resistance:
0.25 max
0.25 max
For fixed-bias operation ............................. .
1 max
1 max
For cathode-bias operation .......................... .
- The dc component must not exceed 100 volts.
megohm
megohm
TWIN-DIODE-HIGH-MU TRIODE
Miniature type used as combined
horizontal phase detector and reactance tube in television receivers emRelated type:
ployingseries-connected heater strings.
8CN7
The triode unit is used in sync-separator, sync-amplifier, or audio amplifier circuits. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be mounted in any
position. For typical operation of triode unit as resistance-coupled amplifier, refer
to RESISTANCE-COUPLED AMPLIFIER SECTION. For curve of average
plate characteristics for triode unit, refer to type 6T8-A. Heater volts (ac/dc), 6.3
(series), 3.15 (parallel); amperes, 0.3 (series), 0.6 (parallel); warm-up time (average), 11 seconds.
6CN7
TRIODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Deeiun-Maximum Values):
PLATE VOLTAGE ..................•..................................
GRID VOLTAGE, Positive-bias value ................................... .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
330 max
o max
1.1 max
volts
volt.
watt
200 max
200-max
volts
volts
Characteristics:
Plate Voltage ............................................... .
100
Plate Resistance \Approx.) ................................... .
Transconductance ....••...•..................................
Plate Current .............................................. .
70
54000
1300
0.8
X:~l~~~i~e,,, F~~t.;r:::.' :::::::::::::::::::::::::::::::::::::
-1
volts
volts
250
-3
70
58000
1200
1
ohms
"mhos
ma
DIODE UNITS
Maximum Ratings, (Dfl8ign-Maximum Values):
PLATE CURRENT (Each Unit) .......................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
• The dc component must not exceed 100 volts.
5.5 max
rna
volts
volt.
p
I<~S
HALF-WAVE VACUUM RECTIFIER
Octal type used as damper tube
in horizontal-deflection circuits of teleIe.
.
H
vision receivers. Outline 14F, OUT8
LINES SECTION . Tube requires octal
H
socket and may be mounted in any
position. Socket terminals 1, 2, 4, and 6 should not be used as tie points. It is especially important that this tube, like other power-handling tubes, be adequately
ventilated. Heater volts (ac/dc), 6.3; amperes, 1.6.
2
7
DAMPER SERVICE
For operation in a 525-li"., SO-frame 8y.tem
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE CURRENT-..................................... .
PEAK PLATE CURRENT .............................................. .
DC PLATE CURRENT ................................................ .
PLATE DiSSiPATION ..................••..............................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
6CQ4
5500
1200
190
6.5
max
max
max
volts
ma
rna
watts
5500-max
300 cmax
volts
volts
max
215
RCA Receiving Tube Manual
Characteristics, Instantaneous Volue:
Tube Voltage Drop for plate current of 250 rna .. . . . . . . . . . . . . . . .
25
volts
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The de component must not exceed 900 volts.
o The de component must not exceed 100 volts.
H
MEDIUM-MU TRIODESHARP-CUTOFF TETRODE
Miniature type used in a wide G2TR 3 .u-'....r--...
variety of applications in color and
black-and-white television receivers
Related type:
5CQ8
employing series-connected heater
strings. Especially useful as combined
GT
vhf oscillator and mixer in tuners of television receivers utilizing an intermediate
frequency in the order of 40 megacycles per second. The tetrode unit is used as a
mixer, video if amplifier, or sound if amplifier tube. The triode unit is used in vhf
oscillator, phase-splitter, sync-clipper, sync-separator, and rf amplifier circuits.
Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket
and may be mounted in any position.
6CQ8
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (Average) ................................... .
Without
External
DIRECT INTERELECTRODE CAPACI1'ANCES:
Shield
Triode Unit:
Grid to Plate .................................... .
l.8
Grid to Cathode and Heater ....................... .
2.7
Plate to Cathode and Heater ....................... .
0.4
Tetrode Unit:
Grid No.1 to Plate ................................ . 0.019 max
Grid No.1 to Cathode, Heater, Grid No.2 and Internal
Shield ........................................ .
5.0
Plate to Cathode, Heater, Grid No.2, and Internal Shield
2.5
Tetrode Plate to Triode Plate ......................... .
0.07 max
3.0
Heater to Cathode (Each Unit) ........................ .
• With external shield connected to cathode of unit under test.
t With external shield connected to ground.
CLASS Al AMPLIFIER
Maximum Ralings, (Design-Maximum Values):
Triode Unit
PLATE VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID-No.2 (SCREEN-GIlID) SUPPLY VOLTAGE ............. .
GRID-No.2 VOLTAGE ................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value. .
PLATE DISSIPATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ....... .
For grid-No.2 voltages between 165 and 330 volts ....
GRID INPUT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. . . . . . . . . . . . . .
Heater positive with respect to cathode. . . . . . . . . . . . . . .
6.3
0.45
11
volts
ampere
seconds
With
Exterllal
Shieldl.8
2.7
l.2
pf
pf
pf
0 015 max
pf
5.0
3.3
0.01 max
3.0t
pf
pf
pf
pf
0 max
3 1 m:
volts
See curve page 70
300 ma.>:
volts
o max
volts
2.5 ma.>:
watts
0.3 ma.>:
watt
See curve page 70
100 ma.>:
100 ma.>:
volts
volts
0.8
2200
9.6
volts
volts
volts
megohm
"mhos
ma
-32
volts
250
100
-2
2.6
rna
0.25 ,"a.>:
1.0 ma.>:
megohm
megohm
1 ,"a.>:
ma
DIODE UNIT
Maximum Rating, (Design-Cenler Value):
PLATE CURRENT ................................................... .
~
4
~p
PENTAGRID AMPLIFIER
Miniature type used as a gated
amplifier in television receivers. In
~52
7 G3
such service, it may be used as a comRelated type ..
3C56, 4C56
I
bined sync separator and sync clipper.
GI
Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact socket and may be mounted in any position.
Heater volts (ac/dc), 6.3; amperes, 0.3.
H 3
:::
6
g~
6C56
CLASS Al AMPLIFIER
Characteristics.
Plate Voltage ..............•...•.•................•..
Grids-No.2-and-No.4 Voltage .••................•.....•
Grid-No.3 Voltage ........................ " ......... .
Grid-No.1 Voltage ........•...........•........•.•.•..
Pl'!te Resistance (A))prox.) ...••...................•...
Gnd-No.3-to-Plate Transconductance .......•...........
Grid-No.l-to-Plate Transconductance •.........•.......•
Plate Current........................................
Grids-No.2-and-No.4 Current ......... " . . . .. . . . .. . . . . .
Grid-No.3 Voltage (Approx.) for plate current of 50 jAa. . . .
Grid-No.1 Voltage (Approx.) for plate current of 50 "a ....
100
30
-1
o
0.7
1500
0.8
5.5
-2.2
100
30
0
-1
1
1100
1.0
1.3
-2.5
volts
volts
volt
volt
megohm
jAmhos
jAmhos
ma
ma
volts
volts
GATED AMPLIFIER SERVICE
Maximum Ratings, (Design-Cenler Values):
PLATE VOLTAGE ........•............•...............................
GRIDB-No.2-AND-No.4 SUPPLY VOLTAGE ...•••........•.............•...
GRIDS-N 0.2-AND-N 0.4 VOLTAGE .•...................................•.
PLATE DISSIPATION ..........•......................................•
GRIDB-No.2-AND-No.4 INPUT:
For grids-No.2-and-No.4 voltages up to 150 volts ................... .
For grids-No.2-and-No.4 voltages between 150 and 300 volts .......... .
CATHODE CURRENT •.........•..•.•••....•.......................•.•.
800 Ina.>:
volts
volts
300 ma.>:
See curve page 70
1 ma.>:
watt
1 max
watt
See curve page 70
14 ma.>:
ma
217
RCA Receiving Tube Manual
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .••...•......................
Heater positive with respect to cathode ••••••.•.•••.•.•..•.....•.•..
200 ma:r:
200-ma:r:
volts
volts
0.47 ma:r:
2.2 ma:r:
megohm
megohms
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance, •••........•..•...•.•...................
Grid-N 0.3-Circuit Resistance .•••.•........•.......•.......•..........
-The dc component must not exceed 100 volts.
MEDIUM-MU DUAL TRIODE
Miniature type used as combined
vertical deflection oscillator and vertiRelated type:
cal deflection amplifier in television reBCS7,
ceivers employing series-connected
I
heater strings. Unit No.1 is used as a
PTa
KTa
conventional blocking oscillator in vertical deflection circuits, and unit No.2 as a
vertical deflection amplifier. Outline SD, OUTLINES SECTION. Tube requires
miniature nine-contact socket and may be mounted in any position. Heater volts
(ac/dc), 6.3; amperes, 0.6; warm-up time (average), 11 seconds.
6C57
CLASS AI AMPLIFIER
Characteristics:
U ..it No.1
Plate Voltage. • . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . .. . . .
250
Grid Voltage.. ... ....................................... -8.5
Amplification Factor. . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . .
17
Plate Resistance (Approx.).. . . .. . . .. . . . . . . . . . . . . .. .. .. . .. 7700
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2200
Grid Voltage (Approx.) for plate current of 10 1'4. . . . . . . .. . . .
-24
Grid Voltage (Approx.) for plate current of 50 1'4 ........... .
Plate Current........................................... 10.5
Plate Current for grid voltage of -16 volts ................. .
u..it No.2
250
-10.5
15.6
3460
4600
-22
19
3
volts
volts
ohms
,.mhos
volts
volts
ma
ma
VERTICAL DEFLECTION OSCILLATOR AND AMPLIFIER
For operatio.. i" a 5185-li.... SO-frame sll8tem
U"it No.1
Oscillator
DC PLATE VOLTAGE .....................•...............
500 ma:r:
PEAK POSITIVE-PULSE PLATE VOLTAGEt (Absolute Ma:r:imum)
PEAK NEGATIVE-PULSE GRID VOLTAGE .................... . -400 ma:r:
PEAK CATHODE CURRENT ................................ .
70ma:r:
AVERAGE CATHODE CURRENT ............................ .
20ma:r:
PLATE DISSIPATION ..................................... . 1.25 ma:r:
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ................ .
200 ma:r:
200-ma:r:
Heater positive with respect to cathode ......•.......•..
Maximum Ratings, (Design-Ce"ter Values):
U"it No. II
Amplifi.r
500 ma:r:
-250 ma:r:
106ma:r:
30ma:r:
6.5ma:r:
volts
volts
volts
ma
ma
watts
200 ma:r:
200·ma:r:
volts
volts
2200·","",
Maximum Circuit Values:
Grid-Circuit Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 ma:r:
2.2 ma:r: megohms
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
625-line. 30-frame system. 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• Under no circumstances should this absolute value be exceeded.
• The dc component must not exceed 100 volts.
BEAM POWER TUBE
6CU5
Related types:
12CU5/12C5,17CU5
Miniature type used in the audio
output stage of television receivers.
Outline 7C, OUTLINES SECTION.
Tube requires miniature seven-contact
socket and may be mounted in any
position.
HEATER VOLTAGE (AC/DC) •............................•..............
HEATER CURRENT ...............................................•...
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate .. " .......................................... .
Grid No.1 to Cathode. Heater. Grid No.2. and Grid No.3 ...•.........
Plate to Cathode. Heater. Grid No.2. and Grid No.3 .•................
6.3
1.2
volts
amperes
0.6
13
8.5
pf
pf
pI
CLASS AI AMPLIFIER
Maximum Ratings, (Desiu..-Ma:r:imum Valu.s):
PLATE VOLTAGE ................................................... ..
218
150 ma:r:
volts
Technical Data
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ............... .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT ............ '" ..... .... ... .. .... ...
. ....... '" "
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode . ........................... .
Heater positive with respect to cathode . ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
- The dc component must not exceed 100 volts.
130 max
o max
7 max
1.4maz
volta
volt.
watts
watts
200 max
200-max
220 max
volta
volt.
·C
Typical Operation:
Plate Voltage ..................................................... ..
Grid-N 0.2 Voltage .................................................. .
Grid-No.1 Voltage .................................................. .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ...................................... ..
Maximum-Signal Grid-No.2 Current .................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance .. ................................................ .
Load Resistance . .................................................. .
Total Harmonic Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
120
110
-8
8
49
50
volta
volts
volts
volt.
rna
rna
rna
rna
ohms
umhos
ohms
per cent
watts
4
8.5
10000
7500
2500
10
2.3
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ... .................................... .
0.1 max
0.5 max
Refer to type 6BQ6GTB/6CU6
H
megohm
megohm
6CU6
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in color and
black-and-white television receivers
employing series-connected heater
strings. The pent ode unit is used as an
if amplifier, a video amplifier, an agc amplifier, and a reactance tube. The triode
unit is used in low-frequency oscillator, sync-separator, sync-clipper, and phasesplitter circuits. Outline 8B, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. For curves of plate
characteristics for pentode unit, refer to type 6AN8.
6CU8
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (Average) ................................. '"
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate .................................................... .
Grid to Cathode, Heater, Pentode Grid No.3, and Internal Shield ...... .
Plate to Cathode, Heater, Pentode Grid No.3, and Internal Shield ..... .
Pentode Unit:
Grid No.1 to Plate ............................................... .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, Triode Cathode, and
Internal Shield ............................................... .
Plate to Cathode, Heater, Grid No.2, Grid No.3, Triode Cathode, and Internal Shield ................................................. .
Pentode Grid No.1 to Triode Plate .................................... .
Pentode Plate to Triode Plate ....................................... .
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 SUPPLY VOLTAGE ............................. .
GRID-No.2 (SCREEN-GRID) VOLTAGE ...................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ............ '" '" '" .... " .......... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ........ '" ..... .
For grid-No.2 voltages between 165 and 330 volts ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode; .............. .
Triode Unit
330 max
o max
2.8 max
6.3
0.45
11
volts
ampere
seconds
1 6
1.9
1.6
pC
pC
pC
025 max
pC
o
7
pC
2.4
0.03 max
0.07max
pI
pI
pC
Pentode Unit
330 max
volt.
330 max
volta
See curve page 70
o max
volt.
2.3 max
watts
0.55 max
watt
See curve page 70
200 max
200 0 max
200 max
200 0 max
volt.
volta
219
RCA Receiving Tube Manual
Charaderislics:
Plate Supply Voltage. . . . . . . . . . . .. . ................... .
Grid-No.2 Supply Voltage.. ....... . ................... .
Grid-No.1 Voltage ...................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid-No.1 Voltage (Approx.) for plate current of 20 )la ...... .
Plate Current .......................................... .
Plate Current for grid-No.1 voltage of -3 volts and cathodebias resistor of 0 ohms ............ . ................. .
Grid-N 0.2 Current ............................ .
o The de component must not exceed 100 volts.
Triode Unit Pentode Unit
125
125
125
-1
56
24
4100
170000
5800
7800
-19
-8
12
17
volt.
volt.
volts
ohm.
ohms
)lmhos
volts
ma
-1.6
3.8
ma
rna
6.3
0.135
volt.
amp
0.92
4.3
1.8
0.18
1.6
pf
pf
pf
pf
pf
HIGH-MU TRIODE
N uvistor type used as a groundedcathode, neutralized rf amplifier in vhf
tuners of television and FM receivers.
Outline 1, OUTLINES SECTION.
Tube requires nuvistor socket and may
be operated in any position.
6CW4
Related tvpe.:
2CW4,13CW4
HEATER VOLTAGE (AC/DC) ................................. . . , '
HEATER CURRENT ....................................... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate ........................................ .
Grid to Cathode, Heater, and Shell ..................... .
Plate to Cathode, Heater, and Shell ................ .
Plate to Cathode. . . . . . . . . . . . . .
. ............. .
Heater to Cathode. . . . . . . . . . .. . ............. .
.......
CLASS A, AMPLIFIER
Maximum Ralings, (Design-Maximum Values):
PLATE SUPPLY VOLTAGE ..................... .
PLATE VOLTAGE ........... .
GRID VOLTAGE:
Negative-bias value ........................ .
Peak positive value.. . . . . . . . .. ............ . ........... .
PLATE DISSIPATION... .. ..........
. ............. .
CATHODE CURRENT ........ " ...................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode. . . .
. ............... .
3000 max
135 max
volt.
volts
55 max
o max
1.5 max
15 max
volts
volts
watt
ma
100 max
100 max
volts
volts
AVERAGE PLATE CHARACTER 1ST ICS
6CW4
TYPE
Ef -6,3 VOLTS
3S
,0
,"-0,0/
30
!
5
0
0
/
5
o
220
/"
-
V
V
/
/'
/
,./"V-
40
:::::
80
o'?/
/
V
/
5
.,.0""
~
/
-
/
/
/
/
-'
;J
).
/
.
./Vp('
V
;"
/ . / ~ / V / ' ::P.
,..;::::: ~ -:::::: ~ k
V
/'
120
160
PLATE VOLTS
f::::::/f
200
240
280
92CM-I0524Tl
Technical Data
=========-
Characteristics and Typical Operation:
Plate Supply Voltage .. .
Grid Supply Voltage .......... .
Cathode-Bias Resistor ................. .
Grid Resistor ....
Amplification Factor ......................... .
Plate Resistance (Approx.) ..... .
Transconductance .............................. .
Grid Voltage (Approx.) lor plate current 0110 "a ..
Plate Current ......... .
110
0
130
65
6600
9800
-4
7
70
0
volts
volts
ohms
ohms
47000
68
5440
12500
I'mh08
7.2
volts
rna
ohms
Maximum Circuit Values:
Grid-Circuit Resistance:For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . .
................
O. 5 max megohm
For cathode-bias operation. . . . . . . .
2.2 max megohms
o A plate supply voltage 01 300 volts may be used provided that a sufficiently large resistor is used in
the plate circuit to limit the plate dissipation to 1. 5 watts under any condition 01 operation.
• For operation at metal-shell temperatures up to 135 0 C.
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in television
receiver applications. Pentode unit is
used as video amplifier; triode unit is
Related type:
used in sound intermediate-frequency
ICXI
amplifier, sweep-oscillator, sync-separator, sync-amplifier, and sync-clipper circuits. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be mounted in any
position. Heater volts (acjdc), 6.3; amperes, 0.75.
6CX8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-N 0.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .. '" ...... '" ................ " .... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ..................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ................ .
For grid-No.2 voltages between 165 and 330 volts ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .............. .
Heater positive with respect to cathode ............... .
Triode Unit
330 max
o max
2 max
Pentode Unit
330 max
volt.
volts
330 max
See curve page 70
volt.
o max
5 max
watts
1.1 max
watt.
See curve page 70
200 max
200·max
200 max
200·max
volt.
volts
150
200
125
68
volts
volts
ohms
70000
10000
-8.5
24
5.2
ohms
"mhos
volts
rna
rna
Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid-No.1 Voltage (Approx.) lor plate current 01100 "a ..... .
Plate Current .......................................... .
Grid-No.2 Current ............................. '" .... ..
150
40
8700
4600
-5
9.2
Maximum Circuit Values:
:
*
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation ................... .
• The de component must not exceed 100 volts.
5P
H
3
K
IS Z
I
CI
Cz
b
K
7 IS
0.5 max
1 max
SHARP-CUTOFF TETRODE
Miniature type used as rf amplifier in vhf tuners of television receivers.
Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact
socket and may be mounted in any
position.
0.25 max
1 max
megohm
megohm
6CY5
Related types:
2CY5,3CY5,4CY5
221
RCA Receit/ing Tube Manual
HEATER VOLTAGE (AC/DC) ..................................•....•..•.
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.)o:
Grid-No.1 to Plate ........................... , .................. .
Grid-No.1 to Cathode, Heater, Grid No.2, and Internal Shield ........ .
Plate to Cathode, Heater, Grid No.2, and Internal Shield ............. .
o With external shield connected to cathode.
6.3
0.2
volt.
ampere
0.03
pI
pI
pI
4.5
3
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............................ .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
CATHODE CURRENT ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 90 volts ................... , .......... .
For grid-No.2 voltages between 90 and 180 volts ................•....
PLATE DISSIPATION ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode .. .
180 max
180 max
volts
volts
See curve page 70
o max
volts
20 max
rna
0.5 max
watt
See curve page 70
2 max
watts
100 max
100 max
volt.
volts
Characteristics:
Plate Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . ...................•
Grid-No.2 Voltage .... , . " .......................................... .
Grid-No.1 Voltage .................................................. .
Plate Resistance (Approx.) .........................................•.
Transconductance .................................................. .
Plate Current ...................................................... .
Grid-No.2 Current ...............................................•...
Grid-No.1 Voltage (Approx.) lor plate current 01 20 I"a .................. .
125
80
volts
volts
volt
megohm
I"mhos
rna
rna
volt.
-1
0.1
8000
10
1.5
-6
Maximum Circuit Value:
Grid-No.1-Circuit Resistance ..•...
0.5 max
megohm
AVERAGE CHARACTERISTICS
I
V
..'""
II
~
'\.y I -
:I
3
V
i
o
iii
"
a:
o
Ef =e.) VOLTS
GRID-Na 2 VOLTS
&
eo -
..,/
12
"z
I
TYPE 6CYS
~
./
t
1-
f
t
r..---
V
'>, V'..,l(;
t--,
./
...... ~>l:O
-- ~
~
If.-
GftlD -
-- ~
-
40
N~'I
80
--
ECI:-~
-1.$
Eel =-2.0
h
p-- -_~c.C
-..=.!.
VOLTS
l-
-- --
-- -b:: -r::;
120
1150
PLATE VOLTS
-=-2.&
l::. -!:2
200
2.0
210
ozeN "ISI,T
DUAL TRIODE
Miniature type used as combined
vertical oscillator and vertical deflection amplifier in television receivRelated type:
!!CYT
ers. Unit No.1 is a high-mu triode
unit used as a blocking oscillator in
vertical deflection circuits, and unit No.2 is a low-mu triode unit used as a vertical
deflection a~lifier. Outline 8D, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. Heater volts (ac/dc),
6.3; amperes, 0.75.
6CY7
222
=---------------
Technical Data
=---------------
CLASS A, AMPLIFIER
Characteristics:
Plate Supply Voltage ................................... .
Grid Voltage .......................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Grid Voltage (Approx.) for plate current of 10 I'a .......... .
Grid Voltage (Approx.) for plate current of 200 I'a ......... .
Plate Current .......................................... .
Plate Current for grid voltage of -30 volta ................. .
Unit No.1
250
-3
Unit No.!
150
68
52000
1300
-5.5
1.2
620
5
920
5400
-40
30
3.5
volts
volt.
ohm.
ohm.
I'mhos
volt.
volts
rna
rna
VERTICAL DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, SO-frame slIstem
Unit No.1
Oscillator
850 ....ax
DC PLATE VOLTAGE .................................... .
PEAK POSITIVE-PULSE PLATE VOI,TAGE# .................. .
-400 max
PEAK NEGATIVE-PULSE GRID VOLTAGE ................... .
PEAK CATHODE CURRENT ............................... .
AVERAGE CATHODE CURRENT ............................ .
1 max
PLATE DISSIPATION ..................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Maximum Ratings, (Design-Maximum Values):
Unit No.2
Amplifier
350 max
1800 max
-250 max
120 max
35 max
5.5 max
volts
volts
volts
rna
rna
watts
200 max
200·max
volts
volts
Maximum Circuit Values:
Grid-Circuit Resistance ................................. .
2.2 max
2.2tmax megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The de component must not exceed 100 volts.
t For cathode-bias operation.
H
BE-AM POWER TUBE
Miniature type used as a vertical
deflection amplifier in high-efficiency
Ie
deflection circuits of television receivRelated type:
5CZ5
ers utilizing picture tubes having diagG2
onal deflection angles of 110 degrees
and operating at ultor voltages up to 18 kilovolts. Also used in the audio output
stage of television and radio receivers. This type has a controlled heater warm-up
time for use in receivers employing series-connected heater strings. Outline 8E,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position.
6CZ5
HEATER VOLTAGE (AC/DC) .......................................... .
6.3
0.45
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (A verage) ................................... .
11
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate. . . . . . .. . .. .. .. . .. . .. .. .. .. .. . . . .. .. .. . . . . . . . ..
0 . 4 max
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3. . . . . ........
9
Plate to Cathode, Heater, Grid No.2, and Grid No.3.................
6
PLATE RESISTANCE (Approx.)*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.073
TRANSCONDUCTANCE*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4800
* Plate and grid-No.2 volts, 250; grid-No.1 volts, -14; plate rna., 46; grid-No.2 rna., 4.6.
volta
ampere
seconds
pf
pf
pf
megohm
~mhos
VERTICAL DEFLECTION AMPLIFIER
For operation in a 525-line, SO-frame sllstem
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE# ............................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOI,TAGE ............ .
PEAK CATHODE CURRENT ............................................ .
AVERAGE CATHODE CURRENT. . . . . . . . . . . . . . . . . . .. .. .. .... " ' ' ' ' ' ' ' ' ' '
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
BULB TEMPERATURE (At hottest point) ............................... .
350 max
2200 max
315 max
-275 max
155 max
45 max
10 max
2.2 max
volts
volts
volta
volta
rna
rna
watt.
watts
200 max
200"max
250 max
volts
volta
·C
223
RCA Receiving Tube Manual
Maximum Circuit Values.
Grid-No.1-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0 . 5 max megohm
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 0 max megohm
tf The duration of the voltage pulse must not e~ceed 15 p,er cent o!, one v~rt.ical scanning cycle. In a
625-line, 30-frame system, 15 per cent of one vertIcal scanmng cycle IS 2.5 mIlhseconds •
• The dc component must not exceed 100 volts.
REMOTE-CUTOFF PENTODE
606
Glass type used in rf and if stages of radio receiversemploying avc. Outline 24A, OUTLINES
SECTION. Tube requires six-contact socket.
Except for interelectrode capacitances, this type
is identical electrically with type 6U7-G. Refer
to type 6SK7 for application information.
Heater volts (ac/dc), 6.3; amperes, 0.3. This
type is used principally for renewal purposes.
SHARP-CUTOFF PENTODE
6D7
Glass type used as detector or amplifier in
radio receivers. Outline 24A, OUTLINES SECTION. Heater volts (ac/de), 6.3; amperes, 0.3.
For electrical characteristics, refer to type 6J7.
Type 6D7 is a DISCONTINUED type listed
for reference only.
PENTAGRID CONVERTER
6D8G
Glass octal type uRed in superheterodyne
circuits. Outline 23, OUTLINES SECTION.
Tube requires octal socket. Heater volts (ac/dc),
6.3; amperes, 0.15. Except for interelectrode
capacitances and heater rating, the 6D8-G is
similar electrically to type 6A8-G. Type 6D8-G
is a DISCONTINUED type listed for reference
only.
NC
K
~
p
HALF-WAVE VACUUM RECTIFIER
K 3
Glass octal type used as damper
tube in horizontal-deflection circuits
2
7
of television receivers. Outline 14C,
Related type:
IC
.
H
I
8
17D4
OUTLINES SECTION. Tube reIe
H
quires octal socket and may bemounted
in any position. May be supplied with pin No.1 omitted. Socket terminals 1, 2, 4,
and 6 should not be used as tie points. It is important that this tube, like other
power-handling tubes, be adequately ventilated. Heater volts Cae/de), 6.3; amperes, 1.2.
60A4
DAMPER SERVICE
For operation in a 51!5-line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE CURRENT- .. '" . . • . . . . . . . . . . . . '" ... '" . . . . . . . . •
PEAK PLATE CURRENT . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC PLATE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION . . . . . . . . . . . '" '" '" . . . . . . . " . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
4400
900
155
5.5
max
max
max
max
volts
rna
rna
watts
Heater negative with respect to cathode... . . .. . . . . . . . . . . . . . . . . . . . . .
4400-max
volts
Heater positive with respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . .
300"'max
volts
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30~frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 900 volts .
• The de component must not exceed 100 volts.
BEAM POWER TUBE
6085
224
Miniature type used as verticaldeflection-amplifier tube in television
receivers. Outline 8D, OUTLINES
SECTION, except all vertical dimensions of this type are 1/8 inch greater.
--=======-, Technical Data ========Tube requires miniature nine-contact socket and may be operated in any position.
Heater volts (ac/dc), 6.3; amperes, 1.2. Except for heater ratings, this type is identical with miniature type 12DB5.
~
H4
SHARP.CUTOFF PENTODE
5 P
Miniature type used in the gaincontrolled picture if stages of color teleK 2
7 03
vision receivers. It is also used as a
I
IS
radio-frequency amplifier in the tuners
01
of such receivers. Outline 7B, OUTLINES SECTION. Tube requires seven-contact miniature socket and may be
mounted in any position.
H 3
:::
60C6
6 02
HEATER VOLTAGE (AC/OO) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTER ELECTRODE CAPACITANCES:
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode. Heater. Grid No.2. Grid No.3. and Internal Shield
Plate to Cathode. Heater. Grid No.2. Grid No.3. and Internal Shield ....
6.3
0.3
0.02 max
6.5
2
volt.
ampere
pI
pf
pI
CLASS AIAMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE. Positive value ................. .
GRID-No.2 SUPPLY VOLTAGE ......................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE. Positive-bias value ............... .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ............................. .
For grid-No.2 voltages between 150 and 300 volts ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
300 max
volts
o max
volt.
300 max
volts
See curve page 70
o max
volts
2 max
watts
0.5 max
watt
See curve page 70
200 max
2000 max
volts
volts
Characteristics:
Plate Supply Voltage.......................... ......................
200
volts
Grid No.3 .................................................... Connected to cathode at socket
Grid-No.2 Supply Voltage ...........................................
150
volts
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
180
ohms
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.5
megohm
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5500
umhos
Grid-No.1 Voltage (Approx.) for transconductance of 50 I'mhos.... ••......
-12.5
volts
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
ma
Grid-No.2 Current .............................. '. . . . . . . .. . . . . . . . . . . .
3
ma
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ....................................... .
o The de component must not exceed 100 volts.
2
o. 25 max
1 . 0 max
megohm
megohm
AVERAGE PLATE CHARACTERISTICS
•
0
TYPE 6DC6
[of' c 6.3 VOLTS
GRID-NI3 VOL.TSzO
GRID-H_Z VOL.TS. 1$0
V
I
20
/
.'.,"
GRIO-NII VOL"5 Eel ~-I
t-
~I$
::I
0(
:.
oJ
/
2
r
~ 10
..
oJ
-2
-3
I
-4
r..
o
-6
-10
.0
100
150
zoo
2~
PLATE VOLTS
300
3>0
'2CM - 8330TI
225
-----------=
RCA,. Receiving Tube· Manual-·
=----------
TWIN· DIODE'SEMI'REMOTE-CU.TOFF PENTODE
Miniature type used as rf- and
if-amplifier tubes in radio and television receivers. Outline SD, OUTLINES SECTION . Tube requires ninecontact socket and may be mounted
in any position. Heater volts (ac/dc), 6.3; amperes, 0.3.
'60C8
PENTODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE SUPPLY VOLTAGE, , , , , ............. , . , ... , ..... , . , ... , .. , ..... .
PLATE VOLTAGE .. , .... , ............... , ........ , .. , ... , .... , .. , . , . , .
GRID-No.2 VOLTAGE:
With plate current greater than 8 ma, ........ , ... , .. , . , . , ....... , .
CAT:~: ~~~~~~~~ ~~. ~~~~.~ ~~: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :
GRID-No.2 INPUT, ... " ...... , ........ , ......... , ..... , .... "", ... .
PLATE DISSIPATION ..... , ............................... ,", .. " .... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode, .......... , ... , . , ....... ..
Heater positive with respect to cathode .. , . , , , ..... , . , ..... , .. , .. , .
550 maz
300 maz
volts
volts
maz
max
max
maz
maz
volts
volts
watts
watts
100 maz
100 max
volts
volts
125
800
16.5
0,45
2,26
ma
Charaderistics.
Plate Voltage .. , ........... , ........................... .
Grid·No.8 ...... , ... ,., ......... , ........... , .......... .
Grid-No.2 Voltage ...... ,., ... , ...... ,.,., ..... ,., ...... .
Grid-No.1 Voltage ... , : , ... , .. , ...... , . , . , .. , ...... , .... .
MI'-Factor, Grid No.2 to Grid No.l. ...... , . , , ...... , ... , .
Plate Resistance (Approx.) .. , ................ , .... , ..... .
Transconductance. , ........... , .. , ...... , ........... , .. .
Plate Current ...... , ... , . , ............ , .. , ..... , .. , . , .. .
Grid-No.2 Current .. , ... , .......... , ............. , .. , .. .
Transconductance, at grid-No.1 voltage of -20 volts ........ .
200
250
volts
Connected to cathode at socket
100
100
volts
-1. 5
-2
volts
20
20
0.6
1
megohm
4500
3800
I'mhos
11
9
ma
3,3
2.7
ma
120
200
"mhos
Maximum Circuit Value••
Grid-No.1-Circuit Resistance ................. , ... , .. , ..... , ... , ..... .
3 maz megohm.
DIODE UNITS (Each Unit)
, Maximum Ratings, (Design-Cenler Values):
PEAK INVERIIE PLATE VOLTAGE ....... ,., .. , ... " .................... .
PEAK PLATE CURRENT ........ ,.,., ......... ,.,., .............. ,., .. .
AVERAGE PLATE CURRENT ................ , .......... , ............... .
HALF-WAVE VACUUM RECTIFIER
200 maz
5 maz
0.8 max
volts
ma
ma
K~P.
Glass octal type used as damper
3
tube in horizontal-deflection· circuits
of television receivers. Outline 14F,
Ie 2
e 7H
Rel.tad types:
1n»E4, 22DE4
OUTLINES SECTION. Tube re. quires octal. socket and may be operH
ated in any position. Socket terminals I, 2,4, and 6 should not be used as tie points.
It is important that this tube, like other power-handling tubes, be adequately
ventilated.
6DE4
HEATER VOLTAGE (AC!DC) .............................. , ............ .
HEATER CURRENT ..........•............... , .......... , .... , ....... .
DIRIIICT INTERELIIICTRODE CAPACITANCES (Approx.):
Plate to Cathode and Heater .................................... .
Cathode to Plate and Heater .................................... .
Heater to Cathode ......................................... , ... .
6.3
1.6
volts
ampere.
8.5
11.6
4
pi
pf
pf
DAMPER SERVICE
For operation in a U5-line, lO-frame sl/8lem
Maximum Ratings, (Design-Mazimum Values):
PEAK INVERSE PLATE VOLTAGE# ..... , ............................... .
PEAK PLATE CURRENT ... , .............................. , ........... .
DC PLATE CURRENT ............................................... .
PLATE DISSIPATION .................. , .............................. .
226
6500
1100
180
6.5
max
max
max
maz
volts
ma
ma
watt.
========- Technical Data ========PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heater positive with respect to cathode .•.................'. . . . . . • . .
5500·max
300-max
volts
volts
Characteristics, Instantaneaus Value:
Tube Voltage Drop for plate current of 350 rna. . . . . . . . . . . . . . . . . . . . . . . . .
84
volt.
I the duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In
a 525-linc, SO-frame system, 15 per ccnt of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 900 volts.
- The de component must not exceed 100 volt•.
~
4
5 P
SHARP-CUTOFF PENTODE
Miniature type used in the gaincontrolled picture if stages of television
2
7 G
receivers utilizing an intermediate freRelated type:
4DE6
K
I~ quency in the order of 40 megacycles
Gi
per second. Also used as an rf amplifier
in vhf television tuners. This tube features very high transconductance combined
with low interelectrode capacitance values, and is provided with separate base pins
for grid No.3 and cathode to permit the use of an unbypassed cathode resistor to
minimize the effects of regeneration. Outline 7B, OUTLINES SECTION. Tube
requires miniature seven-contact socket and may be mounted in any position.
H 3
• G2
6DE6
:::
HEATER VOLTAGE (AC/DC) ..•.........................................
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3,
and Internal Shield ............................... .
Plate to Cathode, Heater, Grid No.2, Grid No.S, and Internal Shield ...............................•......
" With external shield connected to cathode.
Without
External
Shield
0.025 max
6.3
O.S
volts
ampere
With
External
Shield"
0.015 max
pf
6.5
6.5
pf
2
3
pf
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Maximum Value.):
PLATE VOLTAGE .......•............ " .............................. .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value ................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............................ .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ............... .
PLATE DIS~IPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts..............................
For grid-No.2 voltages between 165 and 330 volts. . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode .••.........................•
330 max
o ."ax
330 max
volts
volt.
volts
See curve page 70
o max
volts
2.3 max
watts
0.55 max
watt
See curve page 70
200 max
200emax
volts
volts
Characteristics:
Plate Supply Voltage .....................................•........ '.
125
volts
Grid No.3. . . . . . . . . . . . . . . . . . . . . . • . • . • . • . • . . . . . . . . • • . . . . . . . .
Connected to cathode at socket
AVERAGE PLATE CHARACTERISTICS
I
TYPE SDES
E.,=6.3 VOLTS
GRID N! 3 AND INTERNAL SHIELD
CONNECTED TO CATHODE AT SOCKET.
GRID-N! 2 VOLTS =125
30
EC1"O
(
0
-.
t
II
0
r
o
-2
rI
GRID-N-' VOL.TS ECI--3
-4
ECI=-!)
'00
200
-
300
400
PLATE VOLTS
500
92CM-aS7en
227
RCA Receiving Tube Manual
Grid-No.2 Supply Voltage ....•...•............................•...•..
Cathode-Bias Resistor .............................................. .
Plate Resistance (Approx.) ......................•......••...••.••.•..
Transconductance .••.......................................•..•....•
Transconductance for grid-No.1 volt. of -5.5 and cathode resistor of 0 ohms
Grid-No.1 Voltage (Approx.) for plate current of 20 ,..a ... " .. '" .•... " .•
Plate Current ....•..................•...•..•......•.•....•...•....•.
Grid-No.2 Current .•..............•.••.•........•............•....•.
• The dc component must no; exceed 100 volts.
volt,
ohms
megohm
,..mho.
"mhos
volt"
125
56
0.25
8000
700
-9
15.5
4.2
rna
rna
DUAL TRIODE
Miniature type used as combined
vertical oscillator and vertical-deflection amplifier in television receivRelahld types:
10DE7, 13;)E7
ers. Unit No.1 is a medium-mu triode
unit used as a blocking oscillator in
PTZ
KTZ
vertical-deflection circuits, and unit No.2 is a low-mu triode unit used as a verticaldeflection amplifier. Outline 8D, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. For curve of average
plate characteristics, Unit No.2, refer to type 6DR7.
6DE7
HEATER VOLTAGE (AC/nc) ........................................... .
HEATER CURRENT ........................•..........................
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Unit No.1
Grid to Plate. . . . . • . . . . . . . . . . . . . . . . . . . . . . . . .. ......
4
Grid to Cathode and Heater..........................
2.2
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . .
t . 52
6.3
0.9
Unit No.$
8.5
5.5
1
volt.
ampere
pf
pf
pf
CLASS AI AMPLIFIER
Characteristics,
No.1
250
-ll
17.5
8750
2000
5.5
Uni~
Plate Voltage ......................................... "
Grid Voltage .......................................... .
Amplification Factor ................................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Plate Current .......................................... .
Plate Current for grid volta~e of -24 volts ................ .
Grid Voltage (Approx.) for plate current of 10 ,..a .......... .
Grid Voltage (Approx.) for plate current of 50 "a .......... .
AVERAGE PLATE
25
.,"If-
TYPE 60E7
Ef'= 6.3 VOLTS
"OJ
£/
20
rI.
/
~
/
...
!iIO
~
J
/
5
o
/
/
.,/
/
/
V /
V
/
/
/
/
V /
/
. . .V /" V
;
925
6500
35
10
-20
volt.
volts
ohms
,..mhos
rna
rna
volts
volts
-44
CHARACTERISTICS
;
/
/
/
/ /
/
...... /
100
.,
,'0,
II
/
//
V
6
UNIT N-'
/
V
Unit No.2
150
-17.5
/
/
/
I
/
/ /
/
//
.....-:::V
200
f;
/
V
V
il
;~
V /
V
/
-::. ~V
PLATE VOLTS
V
~
.''J-
/
......-
300
V
400
VERTICAL· DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, aO-frame sy8tem
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ............... " .......... " ....... .
PEAK POSITIVE-PULSE PLATE VOLTAGE# .................. .
PEAK NEGATIVE-PULSE GRID VOLTAGE .................... .
PEAK CATHODE CURRENT ............................... .
AVERAGE CATHODE CURRENT ............................ .
228
Unit No.1
Oocillalor
330 max
-400 max
17 max
22 max
UniINo.$
Amplifier
275 max
1500 max
-250 max
175 max
50 max
volts
volt.
volts
rna
rna
========= Technical Data =========
1.5 max
PLATE DISSIPATION ..................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............. .
7 max
watts
volts
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For grid-resistor bias or cathode-bias operation.. . . . . . . . . . . . .
2.2 max
2.2 max megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The de component must not exceed 100 volts.
~
G2 4
5 CI
P 3
---
2
7
H
H
He 1 8 K
G3
BEAM POWER TUBE
Glass octal type used as output
tube in audio-amplifier applications.
Outline 14C, OUTLINES SECTION.
Tube requires octal socket and may
be mounted in any position. This type
may be supplied with pin 1 omitted.
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ............ .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................. .
6DG6GT
6.3
1.2
volts
amperes
0.6
15
10
pC
pf
pf
CLASS AI AUDIO-FREQUENCY POWER AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
200
125
10
1.25
max
max
max
max
volt.
volts
watts
watts
200 max
200·max
volts
volts
Typical Operation:
Plate Supply Voltage ................................ .
Grid-No.2 Supply Voltage ........................... ..
Grid-N 0.1 (Control-Grid) Supply Voltage .............. .
Peak AF Grid-No.1 Voltage .......................... .
Cathode-Bias Resistor ............................... .
Zero-Signal Plate Current ........................... ..
Maximum-Signal Plate Current ....................... .
Zero-Signal Grid-No.2 Current ........................ .
Maximum-Signal Grid-No.2 Current ................... .
Plate Resistance (Approx.) ........................... .
Transconductance ................................... .
Load Resistance .................................... .
Total Harmonic Distortion ........................... .
Maximum-Signal Power Output ....................... .
110
110
-7.5
7.5
49
60
4
10
13000
8000
2000
10
2.1
200
125
8.5
180
46
47
2.2
8.5
28000
8000
4000
10
3.8
volts
volts
volts
volts
oh,,!s
rna
rna
rna
rna
ohms
Jjmhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ...... .
• The de component must not exceed 100 volts.
H4
~
0.1 max
0.5 max
megohm
megohm
SHARP-CUTOFF PENTODE
Miniature type used as intermediate-frequency amplifier tube in teleK 2
7 C3
vision receivers. This tube features
Related types:
3DK6,12DK6
IS
high transconductance at low plate and
Gil
grid-N 0.2 voltages, combined with low
interelectrode capacitances. Outline 7B, OUTLINES SECTION. Tube requires
miniature seven-contact socket and may be mounted in any position.
H 3
5 P
___
6 C2
HEATER VOLTAGE (AC/DC)............................................
HEATER CURRENT....................
.......................
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and
Internal Shield ............................................. .
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Inter~al Shield ............••..................................
6DK6
6.3
0.3
0.025 max
6.3
1.9
volts
ampere
pC
pC
pC
229
RCA Receiving Tube Manual
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Maximum Value8):
PLATE VOLTAGE .................................................... .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value ................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOI.TAGE, Positive-bias value ................ .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ............................•
For grid-No.2 voltages between 165 and 330 volts .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode .....•......................
330 max
volts
o .,"'""
volts
330 max
volts
See curve page 70
o max
volts
2.3 max
watts
0.55 max
watt
See curve page 70
volts
volts
Charaderisties:
Plate Supply Voltage. . ..............................................
Grid No.3 ..................................................... Connected
Grid-No.2 Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . .
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . • . • . . . . . . . . . . . . . . . .
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . • . • . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . .
Grid-No.1 Voltage (Approx.) for plate current of 20 "a. . .. . ............•
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No 2 Current. . . ...............................................
• The dc component must not exceed 100 volts.
125
volts
to cathode at socket
125
volt.
56
ohms
0.35
megohm
9800
"mhos
-6.5
volts
12
rna
3.8
rna
AVERAGE CHARACTERISTICS
TYPE 6DK6
E~=6.3VOLTS
!
I
I
I I
I
GRID ~ 3 AND INTERNAL SHIELD CONNECTED TO
CATHODE AT SOCKET.
GRID-He 2 VOLTS =125
0
I
1-
5
_GRID-NO I YQLTS [,,,00
r
0
"gJ
\ I
I
0
5
)~
1--
-- --
Y
o
.,!C!,
-
lb
100
200
-
300
- --
-:.l.
I--
-~5-
.00
PLATE YOLTa
!'C£l
--
.II
50D
HALF-WAVE VACUUM RECTIFIER
~p
Glass octal type used as damper
K 3
tube in horizontal-deflection circuits
of television receivers. Outline 14F,
Ie 2
7 H
Related types:
12DM4,17DM4
OUTLINES SECTION. Tube requires octal socket and may be opereH
ated in any position. Socket terminals I, 2, 4, and 6 should not be used as tie points.
It is important that this tube, like other power-handling tubes, be adequately
ventilated.
6DM4
HEATER VOLTAGE (AC/OO) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Plate to Cathode and Heater .................................... .
Cathode to Plate and Heater .................................... .
Heater to Cathode .............................. : .............. .
6.3
1.2
volts
amperes
8.5
11.5
pI
pI
pI
4
DAMPER SERVICE
For operation in a 5115-line, SO-frame system
Maximum Ratings, (De8ign-Maximum Values):
PEAK INVERSE PLATE VOLTAGEo ..................................... .
PEAK PLATE CURRENT .............................................. .
DC PLATE CURRENT ............................................... .
230
5000 max
1100 max
175 max
volts
rna
rna
=========- Technical Data =========
PLATEDISSIPATION..................................................
6.5max
watts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative witb respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5000-"'ax
volts
Heater positive with respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . .
300-max
volts
o The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In
a 525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The de component must not exceed 900 volts.
- The de component must not exceed 100 volts.
BEAM POWER TUBE
Glass octal type used as horizontal-deflection amplifier tube in television receivers having low B-supply voltages. Outline 25A. OUTLINES SECTION. Tube requires octal socket.
Vertical mounting is preferred, but horizontal
mounting is permissible if pins 1 and 3 are in
vertical plane. Heater volts (ac/dc), 6.3; amperes, 2.5. Except for heater ratings, this type is
identical with miniature type 25DN6. Type
6DN6 is used principally for renewal purposes.
H
60N6
Related type:
25DN6
MEDIUM-MU DUAL TRIODE
Glass octal type used as combined
vertical-deflection-oscillator and vertical-deflection-amplifier tube in teleI
vision receivers. Outline 14B, OUTGT2
LINES SECTION. Tube requires octal
socket and may be mounted in any position. Heater volts (ac/dc), 6.3; amperes,O.9.
60N7
CLASS AI AMPLIFIER
Characteristics:
Plate Voltage .................................... .
Grid Voltage ...................................... .
Amplification Factor ................................ .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .
Grid Voltage (Approx.) for plate current of 10 I'a ........... .
Grid Voltage (Approx.) for plate current of 50 "a .......... .
Unit No.1
250
-8
22.5
9000
2500
8
Unit No.2
250
-9.5
15.4
2000
7700
41
-18
-23
volts
volts
ohms
,umhos
rna
volts
volt.
VERTICAL-DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, 3D-frame system
Unit No.1
Maximum Rating;, (Design-Maximum Values):
Oscillator
DC PLATE VOLTAGE .................................... .
350 max
PEAK POSITIVE-PULSE PLATE VOLTAGE# ................... .
PEAK NEGATIVE-PULSE GRID VOLTAGE .................... .
400 max
PEAK CATHODE CURRENT ............................... .
AVERAGE CATHODE CURRENT ............................ .
PLATE DISSIPATION ..................................... .
1 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
200 max
200·max
Heater positive with respect to cathode ............... .
Unit No.2
Amplifier
550 max
2500 max
250 max
150 max
50 max
10 max
rna
watts
200 max
200·max
volts
volts
volts
volts
rna
rna
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max
2.2 max megohms
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max
megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical cycle is 2.5 milliseconds.
• The de component must not exceed 100 volts.
p
K~5
HALF-WAVE VACUUM RECTIFIER
Glass octal type used as damper
tube in horizontal-deflection circuits of
Ie 2
8
7 H
television receivers. Outline 14E, OUTLINES SECTION. Tube requires ocH
tal socket and may be mounted in any
position. Soeket terminals 1, 2, 4, and 6 should not be used as tie points. Heater
volts (ac/dc), 6.3; amperes, 1.2.
60Q4
231
RCA Receiving Tube Manual
DAMPER SERVICE
For operation in a 5ll5-line, aO-frame sllstem
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE ~PLATE VOLTAGEj ........................••..........••.
PEAK PLATE CURRENT ...............................•........•.......
DC PLATE CURRENT .............................................•....
PLATE DISSIPATION ....................•.........................•....
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .................•...........
Heater positive with respect to cathode .....................•.......
max
max
max
max
volts
rna
rna
watts
5500~ax
volt.
volts
5500
1000
175
6
300 0 max
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 250 rna ..................••.•.•...
volts
32
HThe duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 900 volts.
° The de component must not exceed 100 volts.
BEAM POWER TUBE
Glass octal type used as horizontal deflection amplifier in color television receivers. Outline 25A, OUTLINES SECTION. Tube requires octal socket and may be mounted in any
position.
6DQ5
HEATER VOLTAGE (AC/DC) ......•.•.......•..........•....•.•....•..•.
volts
6.3
amperes
HEATER CURRENT ............•....................•.•.•.....••..••..
2.5
DIRECT INTERELECTRODE CAPACITANCES (Approx):
Grid No.1 to Plate ..........................•................•....
0.5
pf
pf
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ............. .
23
pf
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................. .
11
PLATE RESISTANCE (Approx.)* .....•...............................•..
5500
ohms
10500
TRANSCONDUCTANCE* ................................................ .
I'mhos
Mu-FACTOR. Grid No.2 to Grid No.1** ................................ .
3.3
* For plate volts, 175; grid-No.2 volts, 125; grid-No.1 volts, -25; plate rna., 110; grid-No.2 rna., 5.
** For plate and grid-No.2 volts, 125; grid-No.1 volts, -25.
AVERAGE CHARACTERISTICS
.00
-------~
: eoo
..,..
.
)'-'-
~
::;
i
{
400
~
t:!
(
...--
....V-
.. \~ l,....--'
~
V-
~'~
,..-f-r--
U - -f-- ~
:"-
o
;
~.
-
w
200
i--'"
100
200
VOL"S
J.
TYPE 60Q5
E .1.3 VOLTS
Gt.O-N! 2 VOLTS_liS
250
200~
-15
150
-20
I.
::;
:!
,.
N
N
-30
I
300
400
PLATE VOLTS
,
IOO~
Lu
-- -10EC,.o
...,.
..
w
£G'~O
-
50
-3$
500
"«
"
'00
IICM-I30lT
HORIZONTAL DEfLECTION AMPLIfiER
For operation in a 525-line, 30-frame syalem
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE .......... ~ ... " ~"""""""""""""""'"
PEAK POSITIVE-PULSE PLATE VOLTAGEt ............................... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ............................... .
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ............................... .
PEAK NEGATIVE-PULSE.GRID-No.1 (CONTROL-GRID) VOLTAGE ............. .
PEAK CATHODE CURRENT ............................................ .
AVERAGE CATHODE CURRENT .........................•.........
232
990 max
6500 max
-1100 max
190 max
-250 max
1100 max
315 max
volts
volta
volts
volts
volts
rna
rna
========= Technical Data =========
GRID-No.2 INPUT ................................................... .
PLATE DlSSIPATION# ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
BULB TEMPERATURE (At hottest point) ................................ .
3.2 max
24 max
watts
watts
200 max
200 0 max
220 max
volt.
volt.
°C
Maximum Circuit Value:
Grid-No.1-Circuit Resistance:
For grid-resistor-bias operation ...................................... .
0.47 max megohm
t The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle i. 10 microseconds.
# An adequate bias resistor or other means is required to protect the tube in the absence of excitat.ion.
° The de component must not exceed 100 volts.
AVERAGE CHARACTERISTICS
100
..........V
.
(
100
/V
:..
y.
:I
I
c
:l
i
400
~.r
zoo
V
!----
I ~ r--
Itt
".- F-o
P
J
-
~
~r-
250
:::
0:
'#o.t'~~
zoor
:I
~~p::;.;.
c
::;
.2
~ ,...-
100
.../;!
-- -200
SO
lez -125
;;--1"'-
JOO
400
PLATE VOLTS
.
.
•.
"0 ~
:I
~
a
i
0
100
'00
~C:I
NC
3
--p
TYPE 60Q5
E.,. ••. I VOLTS
GRID-Nt I VOLTS_O
rc,
1----- -::f-'-- --
100
~
c:!
~
~\""
6DQ6A
6DQ6B
BEAM POWER TUBE
:::
---
Glass octal types used as horizonz
1
tal-deflection-amplifier tubes in highRelated types:
H
H efficiency deflection circuits of tele12DQ6A, 12DQ68,
I
8
vision receivers. Outline 21, OUT17DQ6A, 17DQ68
NC
G~
LINES SECTION. Tubes require
octal socket and may be mounted in any position. These types may be supplied
with pin 1 omitted. Type 6DQ6-A is used principally for renewal purposes.
HEATER VOLTAGE (AC/OC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.)
.
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ............... .
6.3
1.2
volts
amperes
0.5
15
7
pf
pf
pf
250
150
-22.5
lS000
7300
65
1.S
volts
volts
volts
ohms
-42
-100
volts
volt.
6DQ6-B
770 max
6500 max
volts
volts
CLASS AI AMPLIFIER
Characteristics:
6DQ6-A
Plate Voltage. ... . . . . . . . . . . . . . . . . .
Grid-No.2 Voltage.. ..............
Grid-No.1 Voltage................
Plate Resistance (Approx.). . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . .
Plate Current. . ... . . . . . . . . . . . . . . . .
Grid-No.2 Current................
Grid-N 0.1 Voltage (Approx.) for
grid-No.2 volts=150, plate ma=l,
plate volts=250 . . . . . . . . . . . . . .
plate volts=5000. . . . . . . . . . . . .
60
150
0
315°
25°
250
150
-22.5
20000
6600
55
1.5
6DQ6-B
60
150
0
3450
27"
-40
-100
rna
rna
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a 5ll5-line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
6DQ6-A
DC PLATE-SUPPLY VOLTAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
770 max
PEAK POSITIVE-PULSE PLATE VOLTAGE-. . . . ...............
6000 max
233
RCA Receiving Tube Manual
PEAK NEGATIVE-PULSE PLATE VOLTAGE .................. .
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ................. .
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ......... .
PEAK CATHODE CURRENT .............................. .
AVERAGE CATHODE CURRENT .................. .
GRID-No.2 INPUT ..................... .
PLATE DISSIPATION-................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .... .
Heater positive with respect to cathode ........... .
BULB TEMPERATURE (At hottest point) ............... .
-1500 max
220 max
-330 max
540 max
155 max
3.6 max
18 max
-1500 max
220 max
-330 max
610 max
175 max
3.6 max
18 max
volts
volts
volts
rna
rna
watts
watts
200 max
200 D max
220 max
200 max
200 D max
220 max
volts
volts
·C
Maximum Circuit Values:
Grid-No.1-Circuit Resistance for grid-resistor-bias operation ...
1 max
1 max megohm
o This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, aO-frame system, 15 per cent of one horizontal scanning cy.:!le is 10 microseconds.
• An adequate bias resistor or- other means is required to protect the tube in the absence of excitation.
° The de component must not exceed 100 volts.
AVERAGE CHARACTERISTICS
500
\'
~
, ...
G"JH!I i..~s IEg,:J
~
SO
40"
...a:
1\ ,
.......
-5
,,d
----:\ ~ ......
\
3
~
30 ::;
,I
.J
:i
...u
tI
.z
-10
\.
'-.
....I Ik ":-..-
[;- ....-;;
o
100
TYPE 60Q6-B
[4'=6.3 VOLTS
GRIO" NI 2 VOLTS a ISO
~~ I-.!C/.O
20 N
-IS
';t-- -,
-10
-
-n
200
-
-
t-
Lo
-22.S
- -
I
c
~
10
-30 f--
t-
300
-4
400
&00
PLATE VOLTS
t2CU-IO&5!)T
6DR7
Related type.:
looR7, 13DR7
DUAL TRIODE
Miniature type containing highmu and low-mu triodes; used as combined vertical-deflection-oscillator and
vertical-deflection-amplifier tube in
television receivers. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
operated in any position.
HEATER VOLTAGE (ACjDC) ....................... .
...
. ..
HEATER CURRENT....... ..... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate. . . . . . . .
. .......... .
Grid to Cathode and Heater ...... .
Plate to Cathode and Heater .. .
Characteristics:
Unit No.1
250
-3
Unit No.2
150
-17.5
volts
ampere
pf
pf
pf
CLASS A, AMPLIFIER
Plate Voltage ................................. .
Grid Voltage ....................... .
Amplification Factor .................. .
Plate Resistance (Approx.) ....... .
Transconductance ..................... , ......... .
Grid Voltage (Approx.) for plate current of 10 "a ..... .
Grid Voltage (Approx.) for plate current of 50 "a. , .. .
Plate Current ........................... .
Plate Current for grid voltage of -24 volts.
234
4.5
2.2
0.34
6.3
0.9
Unit No.~
8.5
5.5
1
Unit No.1
68
6
40000
1600
-5.5
925
6500
1.4
-44
35
10
volt.
volt.
ohms
"mhos
volts
volts
rna
rna
========- Technical Data ========AVERAGE PLATE CHARACTERISTICS
UNIT NI.
TYPE "OR7
E.,.- •.3 VOLTS
0
14
......~
2
~'
/
/ )
..~o
0
e
•
4
/
2
l,/::V
o
'0
V
"V V
V
V
"
.-"
100
V
/
V l/
V V
150
200
/
/
/ Vj
V
V
/
/
V
,.
V ,.,
V V V.
250
/'
4 00
:!OO
»0
PL.ATE: VOLTS
9ZCM-9912T
VERTICAL-DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 5i15-line, SO-frame Sl/stem
Maximum Ratings, (Design-Ma:rimum Values):
DC PLATE VOLTAGE ••••••...•...••••.••••••••.•.••••••••
PEAK POSITIVE-PUI.8E PLATE VOLTAGE# ••••.••.•..•.•..•.•
PEAK NEGATIVE-PUI.8E GRID VOLTAGE ..••...•.•.•••••••••
PEAK CATHODE CURRENT ••••••.•...•••...•.•••..•......•
AVERAGE CATHODE CURRENT .•••..•.•.•.•.•.•••..........
PLATE DISSIPATION •..•.•.•••••.•.•.•...•.•.•....•......•
PEAK HEATER-CATHODE VOLTAGE:
Unit No.1
Oscillator
330 ma:r
-400 ma:r
70m"",
20m"",
1m"",
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Unit No.!
Amplifier
275 ma:r
1500 ma:r
-250 ma:r
175 ma:r
50 ma:r
7ma:r
volts
volts
volts
rna
rna
watts
volts
volt.
Maximum Circuit Value:
Grid-Circuit Resistance:
For grid-resiator-bias or cathode-bias operation... . . . . . . .
2.2 ma:r
2.2 m"'" megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. II) a 525line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The dc component must not exceed 100 volts.
AVERAGE PLATE CHARACTERISTICS
UNI T ... 2
TYPE "OR7
E~=6.3 VOLTS
140
120 1 - -
:J
r
§i ~I
r-ff
~
01--
7IPI
J II "r
~60
',/."' ...
I / IJ "
I If, / VI '1j Illj~""h~
:l •0
J
4o
20
o
I'
II
II /
/
(J.0~ ~ ~ ~ ~~
100
1$0
200
250
300
3$0
.. 00
PLATE VOLTS
235
RCA Receiving Tube Manual
p
HIGH-MU TRIODE
Nuvistor type used as groundedcathode, neutralized rf amplifier in vhf
tuners of television and FM receivers.
Related type:
Because of its cutoff characteristics,
2D54
the 6DS4 is used in circuits to reduce
cross-modulation distortion. Outline 1, OUTLINES SECTION. Tube requires nuvistor socket and may be operated
in any position.
6054
HEATER VOLTAGE (Ac/ne).
. ......... .
HEATER CURRENT ............................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate .................................................. .
Grid to Cathode, Heater, and Shell ............................ .
Plate to Cathode, Heater, and Shell ..
Plate to Cathode. . . . .
...................
. ........... .
Heater to Cathode. . . .
. ..................... .
6.3
0.135
volts
ampere
0.92
4.3
1.8
0.18
1.6
pf
pf
pf
pf
pf
110
0
130
63
7000
9000
6.5
-5
-6.8
volts
volts
ohms
CLASS A, AMPLIFIER
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. ......... .
Grid Supply Voltage ......................................... .
Cathode-Bias Resistor .............................................. .
Amplification Factor ................................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance . ......................................... .
Plate Current ...................................................... .
Grid Voltage (Approx.) for plate current of 100 I'a ..................... .
Grid Voltage (Approx.) for plate current of 10 I'a ...................... .
Maximum Ratings, (Design-Maximum Values):
PLATE SUPPLY VOLTAGE ....................... .
PLATE VOLTAGE ...................................... .
GRID VOLTAGE, Negative-bias value ............. " ................... .
GRID VOLTAGE, Peak positive value .................................. .
PLATE DISSIPATION ................................................. .
CATHODE CURRENT.. . ..... .. .. ....... ... .. . ..
. .............. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .... .
Heater positive with respect to cathode .. .
ohms
I'mhos
ma
volts
volts
3000 max
135 max
55 max
o max
1. 5 max
15 max
volts
volts
volts
volts
watt
ma
100 max
100 max
volts
volts
Typical Operation:
70
0
47000
68
5440
12500
7
Plate Voltage. . . . . . . . . . . . . . .. . ........... .
Grid Supply Voltage ......... .
Grid Resistor ............................. .
Amplification Factor ....................... .
Plate Resistance (Approx.) ..... .
Transconductance . .......................................... .
Plate Current ......................................... .
volts
volts
ohms
ohms
I'mhos
ma
AVERAGE PLATE CHARACTERISTICS
TYPE 6054
Et "6.3 VOLTS
5
0
5
....~
0
~
15
/
10
0
236
40
~V
80
V
/
./
,~
./ V ~:P
~
V / V../"V l.--::::~
I
./
):.-:::
~~ •.51/
l/ V
V V k
./
V
;J
~
~ ~ t:::::;;
I 20
PLATE VOLTS
160
~
~~
200
::;
240
280
92CM-IIZ09T
========= Technical Data =========
Maximum Circuit Values.
Grid-Circuit Resistance:·
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.5 max megohm
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max megohms
o A plate supply voltage of 300 volts may be used provided a sufficiently large resistor is used in the plate
circuit to limit the plate dissipation to 1.5 watts under any condition of operation.
• For operation at metal-shell temperatures up to 125°C.
BEAM POWER TUBE
Miniature type used in the audio
output stages of television and radio
receivers. Outline 7C, OUTLINES
SECTION. Tube requires miniature
seven-contact socket and may be
mounted in any position.
6DSS
HEATER VOLTAGE (AC/DC) ...........................................
HEATER CURRENT ..................................................
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ...............................................
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.S .............
Plate to Cathode, Heater, Grid No.2, and Grid No.3 .................
.
.
6.3
0.8
ampere
.
.
.
0.19
9.5
6.3
pf
pf
pf
volta
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
275 max
GRID-No.2 (SCREEN-GRID) VOLTAGE ...•................................
275 max
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive bias value ..... '" ........ .
o max
PLATE DISSIPATION ................................................ .
9 max
GRID-No.2 INPUT ................................................... .
2.2 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. . . . .. . .................... .
200 max
200.A max
Heater positive with respect to cathode ............................. .
BULB TEMPERATURE (At hottest point) . . . . . . . .. . ..................... .
250 max
Fixed-Bias
Cathode-Bias
Typical Operation and Characteristics:
Operation
Operation
Plate Supply Voltage ..................... .
200
250
200
250
Grid-No.2 Supply Voltage ................ .
200
200
200
200
Grid-No.1 Voltage ....................... .
-7.5
-8.5
Cathode-Bias Resistor .................... .
180
270
Peak AF Grid-No.1 Voltage ............... .
7.5
7.5
9.2
8.5
Zero-Signal Plate Current ................. .
27
35
34.5
29
Maximum-Signal Plate Current ............ .
25
32
36
32.5
Zero-Signal Grid-No.2 Current ............ .
3.5
3
3
3
Maximum-Signal Grid-No.2 Current ....... .
9
9
9
10
Plate Resistance (Approx.) ................ .
28000
28000
28000
28000
Transconductance . ....................... .
6000
5800
6000
5800
Load Resistance ......................... .
6000
8000
6000
8000
Total Harmonic Distortion . ............... .
10
10
9
10
Maximum-Signal Power Output ........... .
2.8
3.6
3.8
3
AVERAGE CHARACTERISTICS
100
:::
:
~ 10
r-
c
3
i
N
~
.
eo
~
'l'
CI
~
>
...-
f-- ~
.,
~\O- .. -
...........-
"0
TYPE
lel' o
~p-
-
40
\
!!
~
w 20
....
o
-
so
volts
volts
volts
ohm.
volt.
rna
rna
rna
rna
ohms
~mho9
ohms
per cent
watts
J
-2
"O~TS ~4
~
~.-
-s
~.
-s
---
- -, ~~
:..:::
--- -.3
CI
1
volts
volts
°C
[ ...... 3 VOLTS
GRID-N2 2 YOLTS.ZOO-
Vf--I-"'""
0:
6055
volts
volts
volts
watts
watts
100
ISO
-10
E£.!II:O
-4¥
-14";' -
200
PLATE VOLTS
-12
--;-1 •
- :"'-11
--
2$0
300
350
400
'ZeN-,I'IT
237
RCA Receiving Tllhe Manual
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ........................................... .
For cathode-bias operation ........................................ .
" The dc component must not exceed 100 volts.
o . 1 max
megohm
megohm
1.0 max
p
HALF-WAVE VACUUM RECTIFIER
~
K 3
Glass octal type used as damper
tube in horizontal-deflection circuits
2
7
of color television receivers. Outline
Ie
8
H
14F, OUTLINES SECTION. Tube
H
requires octal socket and may be
mounted in any position. Socket terminals I, 2, 4, and 6 should not be used as
tie points. Heater volts (ac/dc), 6.3; amperes, 1.2.
6014
DAMPER SERVICE
For operation in a S25-line, SO-frame system
Maximum Ratings, (Design-Maximum Values)
PEAK INVERSE PLATE VOLTAGE". . .
. ................... .
PEAK PLATE CURRENT ....................... .
DC PLATE CURRENT ... .
PLATE DISSIPATION ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
5500
1450
235
7.5
max
max
max
max
volts
rna
rna
watts
5500-ma",
300"max
volts
volts
Characierist;cs, Instantaneous Volue:
Tube Voltage Drop for plate current of 350 rna ........................•
28
volts
" The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one hcri2.ontal scanning cycle is 10 mirroseconda.
• The dc component must not exceed 900 volts.
" The dc component must not exceed 100 volts.
BEAM POWER TUBE
6015
Related type:
12DT5
Miniature type used as a verticaldeflection-amplifier tube in television
receivers employing nO-degree picture-tube syst~ms. Outline SD, OUTLINES SECTION. Tube requires miniature nine-contact socket and may
be operated in any position.
HEATER VOLTAGE (AC/DC)............................................
6.3
volts
HEATER CURRENT...............................
............
1.2
amperes
TRANSCONDUCTANCE*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6200
"mhcs
• For plate and grid-No.2 volts, 250; grid-No.1 volts, -16.5; plate rna., 44; grid-No.2 rna., 1.5.
VERTICAL-DEFlECTION AMPLIFIER
For operation in a 525-line, 3D-frame
Maximum Ratings, (Desi(Jn-Alaximum Values):
DC PLATE VOLTAGE.
. ............................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE# .••...
GRID-No.2 (SCREEN-GRID) VOLTAGE ....................... .
PEAK NEGATIVE-PULSE GRID-NO.1 (CONTROL-GRID) VOLTAGE ..
PEAK CATHODE CURRENT ........ .
AVERAGE CATHODE CURRENT.
. ............. .
PLATE DISSIPATIOS.. . . . . . . . . . . . . .
. .......... .
GRID-No.2 INPUT ................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....
Heater positive with respect to cathode.
.~y8tem
315 max
2200 max
285 max
-250 max
190 max
55 max
9 max
2 max
volts
volts
volts
volts
rna
rna
watts
watts
200 max
volts
volts
200·max
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance:
For fixed-bias operation ....
0.5 max megohm
For cathode-bias operation.
1 max megohm
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cyclf>. [n a 525line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milli~econds .
... The de component must not exceed 100 volts.
238
========= Technical Data =========
p
~
SHARP-CUTOFF PENTODE
6DT6
H 3
4
5
6 (;2
Miniature type used as FM detector in television receivers. Outline
Related types:
K 2
7 (;3
7B, OUTLINES SECTION. Tube re. 3DT6A, 4DT6A
IS
quires miniature seven-contact socket
(;1 I
and may be mounted in any position.
Type6DT6 is a DISCONTINUED type listed for reference only.
6DT6A
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.)*
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Grid No.3 to Plate .............................................. .
Grid No.1 to Grid No.3 .......................................... .
Grid No.3 to Cathode, Heater, Grid No.1, Grid No.2, and Internal Shield
*External shield connected to cathode. tFor type 6DT6-A, value is 1.7 I'l'f.
Characteristics:
CLASS AI AMPLIFIER
6DT6-A
6.3
0.3
volts
ampere
0.02
5.8
pf
pf
pf
pf
pf
l.4t
0.1
6.1
6DT6
Plate Supply Voltage ............................................. 150
150
volts
Grid N 0.3 (Suppressor Grid) .................................... Connected to cathode at socket
Grid-No.2 (Screen-Grid) Supply Voltage ............................ 100
100
volts
Cathode-Bias Resistor ............................................ 560
560
ohms
Plate Resistance (Approx.) ....................................... 0.15
0.15
megohm
Transconductance, Grid No.1 to Plate ............................. 1350
800
I'mhos
Transconductance, Grid No.3 to Plate .............................. 515
515
I'mhos
Plate Current ................................................... 1.55
1.1
ma
Grid-No.2 Current ................................................ 1.8
2.1
rna
-4.5
volts
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a .............. '-5.2
Grid-No.3 Voltage (Approx.) for plate current of 10 I'a ............... -4.2
-3.5
volts
FM DETECTOR
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.3 VOLTAGE ................................................ .
GRID-No.2 SUPPLY VOLTAGE ......................................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ............... .
PLATE DISSIPATION ................................................ .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ...................•..........
For grid-No.2 voltages between 165 and 330 volts ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
330 max
28 max
330 max
volts
volts
volts
See curve'page 70
o max
volts
1 .7 max
watts
1 . 1 max
watts
See curve page 70
200 max
200-max
vol ts
volts
0.25 max
0.5 max
megohm
megohm
Maximum Circuit Values:
Grid-N o.I-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ....................................... .
• The dc component must not exceed 100 volts.
AVERAGE PLATE CHARACTERISTICS
16
7
14
/
12
/
/
./
/"
V , // -
~\O-NO.\
IV
/"'
IV
~V
-
TYPE 6DT6-A
E,<6.3 VOLTS
GRID No.3 CONNECTED TO
CAHIODE AT SOCKET. : - - GRID-No.2 VOLTS-IOO
\
1///
I
V
-
~
~E~
-
-I
-2
f.--
o
100
-3
200
300
400
PLATE VOLTS
92CM-8827TZ
239
RCA Receiving Tube Manual
AVERAGE CHARACTERISTICS
r-- ~
"~
2
f'--. r-
"- r--.....
'):~
c,
--
t-_
t-~
6DT6-A
GRID No.3 CONNECTED TO
CATHODE AT SOCKET.
GRID-No2 VOLTS -IDD
-
~
r--~VOt.
. ::..:.: TS,I,Ee,.,
,.
t--
- r-lP-
TYPE
Ef -e.3 VOLTS
~
0
~a'2
~-
-I
r-
I
-
-3
o
IDD
200
300
400
PLATE VOLTS
HIGH-MU TWIN TRIODE
6DT8
Miniature type used in a wide
variety of applications in radio and
R..... type.·
television receivers. Especially useful
I
12DYI
in push-pull rf amplifiers or as freP 2
S
quency converter in FM tuners. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may.be mounted in ,any poSition. Heater
volts (ac/dc), 6.3; amperes, 0.3. Peak heater-cathode· volts: heater negative with
respect to cathode, 200 max: heater positive with relilpectto cathode, 200 max; (the
dc component must not exceed 100 volts). Except for heater and heater-cathode
ratings, interelectrode capacitances, and basing arrangement, this type is identical
with miniature type 12AT7.
DuulKl'r INTERELECTRODE CAPACITANCES (Approx., Each Unit Except as Noted):
Grid to Plate .................................................... .
Grid to Cathode, Heater, and Internal Shield .............•...........
Plate to Cathode, Heater, and Internal Shield ....................... .
Heater to Cathode ...............................................•
Cathode to Grid, Heater, and Internal Shield (Unit No.2) ............ .
Plate to Grid, Heater, and Internal Shield (Unit No.2) ............... .
• With external shield connected to cathode of unit under teet.
- With external shield connected to ground.
t With external shield connected to grid of unit under teet.
1.6·
2.7·
1.6·
S-
5.St
2.8t
pf
pf
pf
pf
pf
pf
MEDIUM.;,MU TRIODE
6DV4
R.I..... type:
2DV4
Nuvistor type used at frequencies
up to 1000 megacycles in uhf oscillator
stages of television receivers. Outline
1, OUTLINES SECTION. Tube requires nuvistor socket and may be
IND£X'LARGE we
mounted in any position.
e· SHORT PIN I IC-l)() NOT USE
HEATER VOLTAGE (AC /DC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER CURRENT...................................................
DIRECT INTERELECTRODE CAPACITANCES (Appro".):
Grid to Plate .................................................. .
Grid to Cathode, Heater, and Shell ............................... .
P\l~te to Cathode, Heater, and Shell ... , .......................... .
Plate to Cathode ............................................... .
Heater to Cathode ............................................. .
Grid to Cathode ............................................... .
240
6.8
0.185
volts
ampere
1.8
4.4
1.9
0.25
1.4
3.7
pf
pf
pf
pf
pf
pf
----------------=
Technical Data
----------------=
CLASS At AMPLIFIER
Mallimum Rating., (Design-Maximum Values):
PLATE SUPPLY VOLTAGE • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . • . . . . . .
PLATE VOLTAGE • . . . . . . . . . . . • . . . . . • . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID VOLTAGE:
Negative-bias value ............................................ .
Peak positive value ............................................. .
PLATE DISSIPATION . . . . . . . . . • . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . .
CATHODE CURRE!;T .•.........•.•...... , . . . . . . . . . . . . . . . . . . . . . . . . , ... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...................... .
Heater positive with respect to cathode ....................... .
300 max
125 max
volta
volts
-55 max
2 max
1 maX'
15 max
volts
volts
watt
rna
100 max
100 max
volta
volts
Characteristics:
Plate Supply Voltage ............................................... .
Cathode-Bias Resistor .............................................. .
Amplification Factor ............................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Grid Voltage (Approx.) for plate current of 10 I-'a ....................... .
Plate Current.. . . . . . . . . . . . . . . . . . .
. ...................... .
75
100
35
3100
11500
-7
10.5
volta
ohms
ohms
I-'mhos
volt.
rna
Typical Operation as Oscillator at 950 Me:
Plate Voltage ...................................................... .
Grid Voltage ...................................................... .
Grid Resistor ...................................................... .
Plate Current ...................................................... .
Grid Current ...................................................... .
60
-2
5600
S
350
volta
volta
ohms
rna
I-'a
Maximum Circuit Values:
Grid-Circuit Resistance:·
For fixed-bias operation ......................................... .
For cathode-bias operation ...... ; ............................... .
• For operation at metal-shell temperatures up to 135 ·C.
0.1 max megohm
0.2 max megohm
AVERAGE PLATE CHARACTERISTICS
TYPE 6DV4
Ef·6.3 VOLTS
30
ff1-51' r l 7
;j!J
£
10
/
1-~0ZI~1/~
~'>J
/
1/
o
20
40
60
,"
/ / :?'i /'
.......-::: ~ /
,/
80
100
,"/
/
--:: ~ ~
120
140
160
PLATE VOLTS
J80
--
200
,1
~~
220
2.40
·260
92CM-!178IT
HALF-WAVE VACUUM RECTIFIER
N ovar type used as damper tube
in horizontal-deflection circuits of color and black-and-white television receivers. Outline 10D, OUTLINES
K
SECTION. Tube requires novar ninecontact socket and may be mounted in any position. Socket terminals 1, 3, 6, and 8
should not be used as tie points; it is recommended that socket clips for these pins
be removed to reduce the possibility of arc-over and to minimize leakage. It is
especially important that this tube, like other power-handling tubes, be adequately
ventilated.
241
6DW4
RCA Receiving Tube Manual
HEATER VOLTAGE (AC/OO) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Plate to Cathode and Heater .................................... .
Cathode to Plate and Heater .................................... .
Heater to Cathode ............................................. .
6.3
1.2
volts
amperes
6.5
9
2.8
pf
pf
pf
DAMPER SERVICE
For operation in a 525-Zine, SO-frame system
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE· ..................................... .
PEAK PLATE CURRENT .............................................. .
DC PLATE CURRENT ................................................ .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
5000
1300
250
8.5
max
max
max
max
volts
rna
ma
watts
5000 "max
300"max
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 350 ma ........................ .
25
volts
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
" The dc component must not exceed 900 volts.
• The de component must not exceed 100 volts.
H
BEAM POWER TUBE
Miniature :type used in vertical GI
deflection amplifier service in television
receivers employing nO-degree deflecNC
tion systems. Outline 8E, OUTLINES
SECTION. Tube requires miniature
Gz
p
nine-contact socket and may be operated in any position. Heater volts (ac/dc),
6.3; amperes, 1.2.
6DWS
CLASS A. AMPLIFIER
Characteristics:
Plate Voltage ................................... .
Grid-No.2 Voltage ............................... .
Grid-No.1 Voltage ............................... .
Amplification Factor ............................. .
Plate Resistance (Approx.) ....................... .
Transconductance ............................... .
Plate Current ................................... .
Grid-N 0.2 Current ............................... .
Grid-No.1 Voltage (Approx.) for plate current of 0.1 ma
Pentode
Connection
60
200
150
150
o -22.5
260·
20·
15000
5500
55
2
-55
Triode
Connection 0
150
-22.5
4.3
volts
volts
volts
ohms
I'mhos
ma
ma
volts
VERTICAL DEFLECTION AMPLIFIER
For operation in a 525-Zine, SO-frame system·
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE" .............................. .
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ............................... .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............ .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATION ................................................. .
GRID-N 0.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
330
2200
220
-250
225
65
max
max
max
max
max
max
11 max
2.5 max
200 max
200*max
volts
volts
volts
volts
ma
ma
watts
watts
volts
volts
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For cathode-bias operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max megohms
• With grid No.2 connected to plate.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
• The duration of. the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, SO-frame system, 15 per cent of one vertical scanning cycle i. 2 . 5 milliseconds.
* The de component must not exceed 100 volts.
242
========= Technical Data =========
HIGH-MU TRIODESHARP-CUTOFF PENTODE
H
Miniature type used in televisionreceiver applications. The triode unit
is used as a sync-separator, sync-amRelated type:
10DXa
plifier, keyed-agc, or noise-suppressor
tube. The pentode unit is used as a
video-output tube. Outline 8D, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. Heater volts (ac/dc),
6.3; amperes, 0.72.
6DX8
CLASS Al AMPLIFIER
Triode
Unit
550 max
600 max
300 max
Maximum Ratings, (Design-Center Values):
Penrode
Unit
550 max
PLATE SUPPLY VOLTAGE ................................. .
PEAK PLATE VOLTAGE, with maximum plate current of 0.1 rna 0
300
PLATE VOLTAGE ........................................ .
550
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........... .
300
GRID-No.2 VOLTAGE ................................. .
40
CATHODE CURRENT .............................. .
12 max
GRID-No.2 INPUT .......................... .
1.7
PLATE DISSIPATION ......................... .
1 max
4
PEAK HEATER-CATHODE VOLTAGE:
200 max
200
Heater negative with respect to cathode .... .
Heater positive with respect to cathode ............ .
200 max
200
Triode
Characteristics:
Unit
Pentode Unit
Plate Voltage ......... , .................. '"
200
170
200
220
220
Grid-No.2 Voltage ..... .
170
200
Grid-No.1 Voltage ...... .
-1. 7
-2.1
-2.9
-3.4
Amplification Factor ................. .
65
MwFactor, Grid-No.2 to Grid-No.1 .. .
36
36
36
Plate Resistance (Approx.) ........ .
0.13
0.15
0.1
Transconductance ............. .
11000
10400
10000
4000
Plate Current ............ .
18
3
18
18
3
Grid-N 0.2 Current ................... .
3
3
max
max
max
max
max
max
volts
volts
volts
volts
volts
rna
watts
watts
max
max
volts
volts
volts
volts
volts
megohm
.umhos
rna
ma
Typical Operation vf Pentode Unit as Video Output Tube:
Plate Supply Voltage. . . . . . . . . . . . . .
Series Plate Resistor. . . . . . . . .
Grid-No.2 Vol tage. . . . . . . . . .
Grid-No.1 Voltage... ....
Transconductance. . . . . . . . . .
Plate Current. . . . . . . .
Grid-N 0.2 Current. . . . . .
...........
170
3000
170
-2
10400
18
3.2
200
3000
200
-2.8
10000
18
3.1
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
Fer fixed-bias operation.
For cathode-bias operation. . . . . . . . . . . . . .
o With maximum duty factor of 0.18 and maximum pulse duration of
H4
~
H3
sK
___
220
3000
220
-3.3
9700
18
3.1
volts
ohms
volts
volts
.umhos
ma
rna
Triode
Pentode
Unit
Unit
1 max
1 max megohm
3 max
2 max megohms
18 microseconds.
MEDIUM-MU TRIODE
6 G
Miniature type used as a localoscillator tube in uhf television reG2
7 P
ceivers covering the frequency range
Related types:
2DZ4,3DZ4
from 470 to 890 megacycles. Outline
I
p
7A, OUTLINES SECTION. Tube requires miniature seven-contact socket and may be mounted in any position. For
curve of average plate characteristics, refer to type 6AF4-A.
HEATER VOLTAGE (AC /DC) ..... .
HEATER CURRENT ... " .......................... .
DIRECT INTERE!.ECTRODE CAPACITANCES (Approx.): 0
Grid to Plate ............. .
Grid to Cathode and Heater .... .
Plate to Cathode and Heater.
o With external shit:'ld conne<>ted to cathode.
6D24
6.3
0.225
volts
ampere
1.8
2.2
1.3
pC
pC
pC
2"'3
RCA Receiving Tube Manual
CLASS A, AMPLIFIER
Characteristics:
Plate Supply Voltage ...............................................
Plate Resistor .....................................................
Amplification Factor ................................................
Plate Resistance (Approx.) ..........................................
Transconductance ..................................................
Plate Current ......................................................
Grid Voltage (Approx.) for plate current of 20 Ita ......................
.
.
.
.
.
.
.
80
2700
14
2000
6700
15
PLATE VOLTAGE .................................................. .
GRID VOLTAGE, Negative-bias value .................................. .
GRID CURRENT ..................................................... .
CATHODE CURRENT ................................................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOI,TAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
135
-50
2
20
2.3
volts
ohms
ohms
Itmhos
rna
volts
-11
UHF OSCILLATOR
Maximum Ratings, (Design-Maximum Values):
max
max
max
max
max
volts
volts
rna
rna
watts
50 max
50-max
volts
volts
Typical Operation as Oscillator at 1000 Me.
Plate Supply Voltage ............................................... .
Plate-Circuit Resistance ............................................. .
Grid Resistor .......... : ........................................... .
Plate Current ...................................................... .
Grid Current (Approx.) ............................................. .
135
2700
10000
15.5
800
volts
ohms
ohms
rna
Ita
Maximum Circuit Values.
Grid-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
• The de component must not exceed 25 volts.
Not recommended
0.5 max megohm
"P:!.~G:::
____ b
TWIN POWER PENTODE
:::'P' PPI
Glass octal type used as power
amplifier tube in high-fidelity audio
7 H
equipment. Outline 19A, OUTLINES H 2
SECTION. Tube requires octal socket
,8
and may be operated in any position.
G,Pz
K,G3
It is especially important that this tube, like other power-handling tubes, be adequately ventilated. Heater voltage (ac/dc), 6.3; amperes, 1.52.
6027
CLASS Al AMPLIFIER
Characteristics, (Each Unit):
Plate Voltage .................................................... .
Grid-No.2 (Screen-Grid) Voltage .................................... .
Grid-No.1 (Control-Grid) Voltage .................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Plate Current ...................................................... .
Grid-N 0.2 Current ................................................. .
250
250
-7.3
38000
11300
48
5.5
volts
volts
volts
ohms
~mhos
rna
rna
PUSH-PULL CLASS ABI AMPLIFIER
Maximum Ratings, (Design-Maximum Values, Per Tube):
PLATE VOLTAGE .................................................... .
GRID-No.2 VOLTAGE................ . .
. ...................... .
GRID-No.2 INPUT (Total) .................... .
PLATE DISSIPATION . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........ .
Heater positive with respect to cathode ..
Typical Operation, (Per Tube):
Plate Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Voltage.... ..... ... .. .. .. .. .... .. .. . ..........
Grid-No.1 Voltage ..... , ... ... .. ..... ... .. .. ....... ... ...
Cathode-Bias Resistor .................................. .
Peak AF Grid-No.1-to-Grid-No.l Voltage. . . .. .....
244
Fixed
Bias
400
250
-11
22
440
300
4
13.2
max
max
max
max
volts
volts
watts
watts
200 max
200 0 max
volts
volts
Cathode
Bias
300
250
120
22
volts
volts
volts
ohms
volts
========= Technical Data =========
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
Effective Load Resistance (Plate-to-Plate) ................. .
Total Harmonic Distortion ........................... .
Maximum-Signal Power Output .......................... .
40
100
4
13
9000
2.5
18
Maximum Circuit Values, (Each Unit):
Grid-No.1-Circuit Resistance ..................................... .
o The dc component must not exceed 100 volts.
PT~"~
66
80
15
9000
3.5
12
rna
rna
ma
rna
ohms
per cent
watts
0.27 max
megohm
7
ELECTRON-RAY TUBE
Glass type used to indicate visually by means of a fluorescent target
the effects of a change in a controlling
Related type:
I
6
voltage. It is used as a convenient
2ES
H
H
means of indicating accurate radioreceiver tuning. Maximum dimensions: over-all length, 4-3/16 inches; seated height,
3-9/16 inches; diameter, 1-3/16 inches. Tube requires six-contact socket. Heater
volts (ac/dc), 6.3; amperes, 0.3. For additional considerations, refer to Tuning Indication with Electron-Ray Tubes in ELECTRON TUBE APPLICATIONS SEC TION.
••••: " , ,
6E5
RC
TUNING INDICATOR
Maximum and Minimum Ratings, (Design-Center Values):
PLATE-SUPPLY VOl.TAGE .•.•.•••.••••••••••••••.•••••••••••••.••••••.•
TARGET VOLTAGE •••••.••.•••.••..• " •.•••.•••.•••.•.••.••. " ••..•••
250 max
{ 250 max
125 min
volts
volts
volts
Typica I Operation:
Plate and Target Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . .
Series Triode-Plate Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Target Current*t. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triode-Plate Current*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triode-Grid Voltage (Approx.):
For shadow angle of O· . . • • • • . • • • • • . . • • . . • . . . • • • . • • . • • •
For shadow angle of 90· .......••.......... '. . . . . . . . . . . .
For zero triode-grid voltage.
t Subject to wide variations.
*
K
200
1
3
0.19
250
1
4
0.24
volts
megohm
ma
rna
-6.5
0
-8.0
0
volts
volts
TWIN POWER TRIODE
Glass type used as class Al amplifier in
either push-pull or parallel circuits. Outline 27,
OUTLINES SECTION. Heater volts (ac/dc),
6.3; amperes, 0.6. With plate volts of 250 and
grid volts of -27.5, characteristics for each unit
are: plate rna., 18; plate resistance, 3500 ohms;
transconductance, 1700 Ilmhos; amplification
factor, 6. With plate-to-plate load resistance
of 14000 ohms, output for two tubes is 1.6 watts. This is a DISCONTINUED type listed for reference only.
6E6
G:;
4
REMOTE-CUTOFF PENTODE
GI
Glass type used in rf and if stages of radio
receivers employing avc. Outline 24A, OUTLINES SECTION. Except for intereleetrode
capacitances, this type is identical electrically
with type 6U7-G. Heater volts (ae/dc), 6.3;
amperes, 0.3. This is a DISCONTINUED type
listed for reference only.
H*5Gz
H
3
b
K
IS 2
P
K
I
GI
7 IS
6E7
SHARP-CUTOFF TETRODE
Miniature type used as rf amplifier in vhf tuners of television receivers.
Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact
socket and may be operated in any
position.
HEATER VOLTAGE (Ae/DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6EA5
Related type:
3EAS
6.3
0.2
volts
ampere
245
RCA Receiving Tube Manual
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate. . . . . . ............................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Internal Shield.
Plate to Cathode, Heater, Grid No.2, and Internal Shield ....
• With external shield connected to cathode.
Without
External
Shield
0.06 max
3.8
2.3
With
External
Shield·
0.05 max
4.5
3
pf
pf
pC
250 max
150 max
o max
20 max
0.5 max
3.25 max
volts
volts
volts
rna
watt
watts
200 max
200"max
volts
volts
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
CATHODE CURRENT ................................................. .
GRID-No.2 INPUT ......................................... .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .................. .
Heater positive with respect to cathode ........................... .
Characteristics:
Plate Voltage ......................................................
Grid-No.2 Voltage ..................................................
Grid-No.1 Voltage ..................................................
Plate Resistance (Approx.) ..........................................
.
.
.
.
Transconductance, ................................................. .
Plate Current ...................................................... .
Grid-N 0.2 Current ................................................. .
Grid-No.1 Voltage (Approx.) for transconductance of 100 J.
i
...
iiI $
i
0
$
o
~c..
~
V~V
V
V
V
V
J..-"
10-'"
J..-"
(....(...............V I-~
I---'
I---:V.
V
200
100
-
aoo
-400
PLATE VOLTS
92CM-9907TI
GRID-No.2 INPUT:
For grid-N 0.2 voltages up to 165 volts ................ .
For grid-No.2 voltages between 165 and 330 volts ...... .
watts
See curve page 70
1.1 mao:
PEAK HEATER-CATHODE VOLTAGE:
. Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
° The dc component must not exceed 100 volts.
Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Grid Voltage ................................•...........
Cathode-Bias Resistor .................................. .
Amplification Factor ................................... ..
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid Voltage (Approx.) for l>late current of 20 pa .......... .
Grid-No.1 Voltage (Approx.) for plate current of 100 pa .... "
Plate Current .......................................... .
Grid-No.2 Current ..••....•...•.............•...........
200 mao:
200"ma",
Triode
Unit
250
-2
100
37000
2700
-5
200 mao:
200o mao:
Pen!ode
Unit
200
125
68
75000
12500
-9
2
25
7
volts
volts
volts
volts
volts
ohms
ohms
pmhos
volts
volts
ma
ma
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation ......................... ..
0.5 mao:
1.0 ma",
0.25 mao:
1.0 mao:
megohm
megohm
AVERAGE CHARACTERISTICS
PENTODE UNIT
I
TYPE 6EBB
t~"3VOLTS
G
-Nl2VOLTS:12&
GRID-He l VOLTS £9,=0
I1"1.---I--
-I
(>
\j
I-- l----
.1
·it
f--
y
o
- - -~I'!:''1'-VO~T4 ~C1.!"5
---.
~=-$
I
100
200
300
.00
PLATE VOLTS
249
RCA Receiving Tube Manual
POWER PENTODE
Miniature type used in the audio
output stage of radio and television
receivers and in phonographs. This
Related types:
12EH5,25EH5,50EH5
type has unusually high power sensitivity and is capable of providing rel~3
atively high power output at low plate and screen-grid voltages with a low af gridNo.1 driving voltage. Outline 7C, OUTLINES SECTION. Tube requires miniature
seven-contact socket and may be mounted in any position.
6EH5
HEATER VOLTAGE (AC/DC) ..........•......•........................•.
HEATER CURRENT ...............................................•...
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........ .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 .............. .
6,3
1.2
volts
amperes
0.65
17
9
pf
pf
pC
CLASS Al AMPLIfiER
Maximum Ratings, (Design-Maximum Values):
150
130
5.5
2
PLATE VOLTAGE ............................•........................
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT ................................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
BULB TEMPERATURE (At hottest point) ............................... .
max
max
max
max
volts
volts
watt.
watt.
200 max
200-max
220 max
volts
volts
°c
Typical Operation:
Plate Supply Voltage .............................................. .
Grid-No.2 Supply Voltage ........................................... .
Cathode-Bias Resistor ............................................... .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Load Resistance .................................................... .
Total Harmonie Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
volts
volts
ohms
volts
110
115
62
3
42
42
11.5
14.5
11000
14600
3000
7
1.4
rna
rna
rna
rna
ohms
"mhos
ohms
per cent
watt.
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . .. . ............ .
For cathode-bias operation ....................................... .
- The de component must not exceed 100 volts.
AVERAGE
100
\
-r
/
\
J
6-,- - 1.
\
0
~6 0
\
"z
b
~
"o
\
\
40
w 20
~
I
ix
~
I.
TYPE 6EH5
Ef' = 6,3 VOLTS
--l ---
-
\
Ec,::'~\
I----
~
" '-
I--'
":c.£.
-2._
-~
-4
f-. f-.EC,::o
-;
'.-
20
-~
1- 2
I'h.
40
60
80
PLATE
250
1
GRIO-N~2 VOLTS=IIS
GRIO- N!!. I vOllS
/
N
CHARACTERISTICS
0
,r-
megohm
megohm
0.1 max
0.5 max
100
VOLTS
-+
120
-.
-=-0'
140
4
160
92CM-9623T
----------------= Technical Data =========
PUSH-PULL CLASS ABI AUDIO-FREQUENCY POWER AMPLIFIER
Maximum Ratings: (Same as for class AI audio-frequency power amplifier)
Typical Operation, (Values are for 2 lubes):
Plate Supply Voltage ............................................... .
Grid-No.2 Supply Voltage ............................. '" '" ........ .
Cathode-Bias Resistor .............................................. .
Peak AF Grid-No.1 Voltage ......... '" '" ...... '" '" ... '" ........ .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-N 0.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Effective Load Resistance (Plate-to-plate) ............................. .
Total Harmonic Distortion .......................................... .
Maximum-Signal Power Output ............................. .
140
120
68
9.4
47
51
11
17.7
6000
5
3.8
volts
volts
ohms
volts
rna
rna
rna
rna
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ......................... , ............ .
H
0.1 max
0.5 max
megohm
megohm
SEMI REMOTE-CUTOFF PENTODE
Miniature type used as if-amplifier tube in television receivers. Outline 8C, OUTLINES SECTION. Tube
requires nine-contact socket and may
be mounted in any position. Heater
volts Cac/dc), 6.3; amperes, 0.3.
6EH7
Related types:
3EH7,4EH7
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Center Vailles):
PLATE SUPPLY VOLTAGE.. . . .
. ....................... .
. ........................
PLATE VOLTAGE.. . . . .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value .................
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........... .
GRID-No.2 VOLTAGE ................................... .
CATHODE CURRENT .................................. .
GRID-No.2 INPUT ..................................................
PLATE DISSIPATION .................................... ' ............
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...........................
Heater positive with respect to cathode. . . . . . . . . . .
. ...........
.
.
550 max
250 max
o max
550 max
250 max
20 max
0.65 max
2.5 max
volts
volts
volts
volts
volts
rna
watt
watts
.
.
150 max
150 max
volts
volts
.
.
Characteristics:
Plate Voltage.. ...... ........ .. .. ... ....... . ...... ... ..... ..........
200
volts
Grid No.3 .................................................... Connected to cathode at socket
Grid-N 0.2 Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
volts
Grid-No.1 Voltage...
................
. . . . . . . . . . . . . .. . . .
-2
volts
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.5
megohm
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12500
I'mhos
Plate Current.. . . . .
...........
.................
12
rna
Grid-N 0.2 Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4. 5
rna
Typical Operation:
Plate Voltage ........ .
Grid No.3 ......... .
Grid-No.2 Supply Voltage ..
Grid-N 0.2 Series Resistor ...... .
Grid-No.1 Voltage ... .
Transconductance ..... .
RMS Grid-No.1 Voltage, for cross-modulation
factor of 0.01 ..
200
200
200
200
Connected to cathode at socket
200
200
200
200
22000
22000
22000
22000
-19.5
-9.5
-6.5
-2
125
625
1250
12500
450
160
100
volts
volts
ohms
volts
",mhos
mv
Maximum Circuit Values:
Grid-No.1-Circuit Resistance.
1 max
megohm
251
RCA Receiving Tube Manual
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
H
Miniature type used as combined oscillator
and mixer tube in vhf tuners of television receivers having series-connected heater strings.
Outline 8B, OUTLINES SECTION. Tube requires nine-contact socket. Heater volts (ac/dc),
6.3; amperes, 0.45; warm-up time (average), 11
seconds. Characteristics as class A, amplifier:
plate and grid-No.2 volts, 125 (800 max); gridNo.1 volts,-l(O max); amplification factor (triode unit), 40; plate resistance (pentode unit, approx.), 0.17 megohm; transconductance, 7500 "mhos
(triode unit), 6000 umhos (pentode unit); plate rna., 13.5 (triode unit), 12 (pentode unit); grid-No.2
rna. (pentode unit), 4; peak heater-cathode volts, 200 max (the dc component must not exceed 100 volts).
This type is used principally for renewal purposes.
6EH8
SHARP-CUTOFF PENTODE
6EJ7
Related types:
3EJ7,4EJ7
Miniature type used as if-amplifier tube in television receivers. Outline8C, OUTLINES SECTION. Tube
requires miniature nine-contact socket
and may be mounted in any position.
Heater volts (ac;dc), 6.3; amperes,0.3.
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE SUPPLY VOLTAGE .................................... .
PLATE VOLTAGE ............................................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .................... .
GRID-No.2 VOLTAGE .................................. .
CATHODE CURRENT .................................... '" .......... .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...................... .
Heater positive with respect to cathode ......................... .
max
max
max
max
max
max
max
volts
volts
volts
volts
rna
watt
watts
150 max
150 max
volts
volts
550
250
550
250
25
0.9
2.5
Characteristics:
Plate Voltage .......................................... .
Grid No.3............
. ......... .
Grid-No.2 Voltage ..................... .
Grid-No.1 Voltage ......................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Plate Current .......................................... .
Grid-N 0.2 Current ..................................... .
190
200
volts
Connected to cathode at socket
190
200
volts
-2.35
-2.5
volts
0.35
0.35
megohm
15000
15000
"mhos
10
10
rna
4.1
4.1
rna
Maximum Circuit Values:
max megohm
Grid-N o.l-Circuit Resistance ........... .
H
BEAM POWER TUBE
Miniature type used as vertical
deflection amplifier in television reRelated type:
ceivers utilizing picture tubes having
'EMS
diagonal deflection angles of 110 degrees. Outline 8E, OUTLINES SEC(;2
p
TION. Tube requires miniature nine-contact socket and may be mounted in any
position.
6EM5
HEATER VOLTAGE (AC/DC)............................................
HEATER CURRENT...................................................
6.3
0.8
volts
ampere
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.7 max
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3. . . . . . . . . . . . .
10
Plate to Cathode, Heater, Grid No.2, and Grid No.3. . . . . . . . . . . . . . . . . .
5.1
PLATE RESISTANCE (Approx.)*. .. . . . . .. . . . . .. .. . . .. . . . . .. . . . . .. . . . . . . .
0.05
TRANSCONDUCTANCE*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5100
For plate and grid-No.2 volts, 250; grid-No.1 volts, -18; plate rna., 40; grid-No.2 rna., 3.
*
252
pf
pf
pf
megohm
"mhos
Technical Data
TYPE:
6EM5
E,.= b.3VOLTS
"~20
.
~
~
I.
T
N
!! 150
I
N
¥
lI!\
V,
Q
~
I
>"'~
o
::;
AVERAGE CHARACTERISTICS
IT
I--GRIO-N9Z VOCr=25,
:3
=========-
10 0
\5
~
I
I--
-10
I
-,.
I
0
V
It
"- .-
-
.1- -I.
,0
o
-20
Ie,
100
,.0
£el,;ji ~
-2'
r--_1O
300
200
250
PLATE VOLTS
,.0
VERTICAL DEFLECTION AMPLIFIER
For operation in a 525-line, 3D-frame system
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • .
PEAK POSITIVE-PULSE PLATE VOLTAGEt (Absolute Maximum) . ........... .
GRID-No.2 (SCREEN-GRID) VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE . . . . . . . . . . . . .
PEAK CATHODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AVERAGE CATHODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID-No.2 INPUT..............................
. ........... .
PEAK HEATER-CATHODE VOLTAGE:
315 max
2200'max
285 max
-250 max
210 max
60 max
10 max
1.5 max
watts
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
200 max
200-max
250 max
volts
volts
·C
BULB TEMPERATURE (At hottest point). . . . . .
. ................... .
volts
volts
volts
volts
rna
rna
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance..........................................
2.2 max
megohm
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line. 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
~ Under no circumstances should this absolute value be exceeded.
• The dc component must not exceed 100 volts.
AVERAGE
CHARACTERISTICS
WITH Eez AS VARIABLE
25 0
TVPE
1
.'"
r
0.
15 0
/
i
'"
~
... 10 0
I---
-
200
I
GRID-Ne 2 VOLTS EC2=150
t--
IT
0
-
II
a:
"'j"
1
z~
20 0
'"
6EM5
~~I~~'~~~O~~~TS=O
100
7
50
1/
o
50
100
150
200
PLATE
250
VOLTS
300
350
400
92CM-9672T
253
RCA Receiving Tube Manual
DUAL TRIODE
Glass octal type containing highmu triode and high-perveance, low-mu
triode in same envelope. Used as comRelated types:
10EM7, 13EM7
bined vertical-deflection amplifier and
vertical-deflection oscillator in television receivers employing picture tubes having llO-degree deflection angles and
high ultor voltages. Outline 14A, OUTLINES SECTION. Tube requires octal
socket and may be mounted in any position. For curve of average plate characteristics, Unit No.1, refer to type 6DR7 (Unit No.1).
6EM7
HEATER VOLTAGE (Ac/ne) ...........................•................
HEATER CURRENT .................................................. .
Unit No.1
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate.......................................
4.8
Grid to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . .
0.6
CLASS A, AMPLIFIER
Characteristics:
Plate Voltage .......................................... .
Grid Voltage .......................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Unit No.1
250
-3
64
40000
1600
6.3
0.925
Uni!No.2
10
7
1.8
Unit No.2
150
-20
5.4
750
7200
Grid Voltage (Approx.):
For plate current of 101'a. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-5.5
For plate current of 100 I'a. . . . . . . . . . . . . . . . . . . . . . . . . . .
-45
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 4
50
Plate Current, for plate voltage of 60 volts and zero grid voltage
95
Plate Current, for ,rid voltage of -28 volts.... ....... .......
10
# The duration of the voltage pulse must not exceed 15 per cent of one vertical-scanning cycle. In
line, 30-frame system, 15 per cent of one vertical-scanning cycle is 2.5 milliseconds.
• The de component must not exceed 100 volts.
VERTICAL-DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, SO-frame system
Unit No.2
Unit No.1
Maximum Ratings, (Design-Maximum Values):
Amplifier
Oscillator
330 max
DC PLATE VOLTAGE ......... '" ........................ .
330 max
1500 max
PEAK POSITIVE-PULSE PLATE VOLTAGE# ................... .
-400 max
-250 max
PEAK NEGATIVE-PULSE GRID VOLTAGE .................... .
PEAK CATHODE CURRENT ............................... .
77 max
175 max
AVERAGE CATHODE CURRENT ............................ .
22 max
50 max
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 5 max
10 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
200 max
200 max
Heater positive with respect to cathode ............... .
200 max·
200 max·
AVERAGE PLATE CHARACTERISTICS
UNIT Nt 2
TYPE 6EM7
E.f=6.3 VOL.TS
~ I
1.4
oe-
"-h 7..
I.
'I
~
~
PI
o~V
I / IFj ~
.///-'~p
77,7 '/J'I!~~~
771TJ. I!J 71VjJ ~}f~
T/7 I1J IT! 'l/71. ~ Y1
o
0
/
/
/
0
40
50
100
1$0
200
2$0
300
350
400
PL. ...TE VOLTS
92CM-I0466T
254
volts
ampere
pf
pf
pf
volts
volts
ohms
I'mhos
volts
volts
rna
rna
rna
a 525-
volt"
volts
volts
rna
rna
watts
volts
volts
Technical Data·=========
Maximum Circuit Values:
Unit No.1
2.2 max
2.2 max
Grid-Circuit Resistance:
For grid-resistor-bias operation ....................... .
For cathode-bias operation .......................... .
DIODE- REMOTE-CUTOFF
PENTODE
Miniature type used as combined
if amplifier and AM detector in AM
and AM/FM radio receivers. Outline
8D, OUTLINES SECTION. Tube requires miniature nine-contact socket
and may be operated in any position.
H
Unit No.2
2.2 max megohms
2. 2 max megohms
6EQ7
Related types:
12EQ7,20EQ7
HEATER VOLTAGE (AC/DC) ........................................... .
6.S
HEATER CURRENT .................................................. .
O.S
DIRECT INTERELECTRODE CAPACITANCES:
Pentode Unit:
Grid No.1 to Plate ............................................. .
0.002 max
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.S, and Internal Shield
5.5
5
Plate to Cathode, Heater, Grid No.2, Grid No.S, and Internal Shield ..
Pentode Grid No.1 to Diode Plate .................................... . 0.0015 max
0.095
Pentode Plate to Diode Plate ................................ .
volts
ampere
pf
pf
pf
pf
pf
PENTODE UNIT AS CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
SOO max
volts
GRID-No.S (SUPPRESSOR-GRID) VOLTAGE:
SOO max
volts
Positive value .................................................. .
-SOO max
volts
Negative value ................................................. .
SOO max
volts
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ...................... .
GRID-No.2 VOLTAGE .................................................. . . ... See curve page 70
GRID-No.1 (CONTROL-GRID) VOLTAGE:
volts
o max
Positive-bias value ............................................. .
-50 max
volts
Negative-bias value ........... ' ................................ .
3 max
watts
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.2 max
watt
GRID-No.S INPUT ........................................... .
GRID-No.2 INPUT:
0.6 max
watt
For grid-N 0.2 voltages up to 150 volts ................ .
. ....... See curve page 70
For grid-N 0.2 voltages between 150 and 300 volts ........... .
PEAK HEATER-CATHODE VOLTAGE:
200 max
volts
Heater negative with respect to cathode .......... .
200-max
volts
Heater positive with respect to cathode .......... .
150 max
BULB TEMPERATURE (At hottest point) ........... .
°C
Characteristics:
Plate Voltage.
.............................................
Grid N o.S ..................................................... Connected
Internal Shield. . . . . . . . . . . . . . . . .. ..............
. . Connected
Grid-No.2 Voltage. . .. ........................
..........
Grid-No.1 Supply Voltage.. ...... ......... ... .. .. ... . ... .. . ... ..
Grid-N 0.1 Resistor (Bypassed). . . . . . . . . . . . . . . . . .
............
100
volts
to cathode at socket
to cathode at socket
100
volts
0
volts
2.2
megohms
AVERAGE CHARACTERISTICS
TYPE
~EQ7 I
I
I
I
4 Ef:6.3 VOLTS
GRID No.3 AND INTERNAL SHIELD
CONNECTED TO CATHODE AT SOCKET.
GRID-No.2 VDLTS=IOO
2
0
I
/
1.,o-No
Ee,'O
-I
lb
6
•
l, VOLTl
.--
1/
,
-2
-
, IV ....
IX:
2
Ie2
ECI=O
-3
-I
-,
-5
-2
-10
-20
/'
o
100
200
300
400
500
PLATE VOLTS
255
RCA Receiving Tube Manual
Plate Resistance (Approx.) ..........................................
Transconductance . .................................................
Plate Current ......................................................
Grid-No.2 Current .................................................
Grid-No.1 Voltage (Approx.) for transconductance of 40 I'rnhos ..........
.
.
.
.
.
DIODE UNIT
Maximum Ratings, (Design-Maximum Values):
PLATE CURRENT ................................................... .
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 2 rna .......................... .
• The dc component mu.t not exceed 100 volts.
6ERS
Related types: .
2ER5,3ER5
Maximum Circuit Value:
Grid Circuit Resistance ............................................. .
10
rna
volts
max
max
max
max
volts
volt.
rna
watts
100 max
100 max
volts
volt.
250
-50
20
2.2
200
-1.2
80
8000
10500
10
-3.8
-5.6
volts
volts
ohms
I'rnhos
rna
volts
volts
1 max
megohm
250 max
volts
volt.
rna
HIGH-MU TRIODE
Miniature type used as groundedcathode rf amplifier in vhf television
receivers. Outline 7B, OUTLINES
SECTION. Tube requires miniature
seven-contact socket and may be operated in any position. Heater volts
(ac/dc), 6.3; amperes, 0.2.
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Positive-bias value . .................................. .
CATHODE CURRENT ................................................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOL'rAGE:
Heater negative with respect to cathode ........................... .
Heater po.itive with respect to cathode ........................... .
Characleristics:
Plate Voltage ...................................................... .
Grid Voltage ..................................................... ..
Amplification Factor . ............................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Plate Current ...................................................... .
Grid Voltage (Approx.) for. plate current of 100 I'a ..................... .
Maximum Circuit Values:
Grid-Circuit Resistance ............................................. .
256
1 max
HIGH-MU TRIODE
Miniature type with frame grid
used in vhf tuners of television receivers. Outline 7B, OUTLINES SECTION. Tube requires miniature sevencontact socket and may be mounted
in any position. Heater volts (acjdc),
6.3, amperes, 0.18.
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Cenler Values):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Negative-bias value ....... " ......................... .
CATHODE CURRENT ............................ '" ............ '" ... .
PLATE DISSIPATION ........................... '" ... '" '" '" '" .... .
PEAK HEATER-CATHODE VOI.TAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
Cha ra cleristics:
Plate Voltage ...................................................... .
Grid Voltage ................................ '" ......... '" '" .... .
Amplification Factor ................................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Plate Current ...................................................... .
Grid Voltage (Approx.) for transconductance of 500 I'mhos .............. .
Grid Voltage (Approx.) for transconductance of 100 I'mhos .............. .
6ESS
megohm
I'rnhos
rna
rna
volts
0.25
3800
9
3.5
-20
o max
22 max
2.2 max
watts
100 max
100 max
volts
volt.
200
-1
75
8000
9000
10
-6
1 max
volts
volt
ohms
I'mhos
rna
volts
megohm
----------------=
Technical Data
V ARIABLE-MU TWIN TRIODE
Miniature type with high transconductance, variable mu, and low
noise; used as cascode-type amplifier
Relate.. Iype:
4ES8
in tuners of television receivers. Outline BB, OUTLINES SECTION. Tube
requires miniature nine-contact socket and may be operated in any position. Heater
volts (ac/dc), 6.3; amperes, 0.365.
6ES8
CLASS A, AMPLIFIER (Each Unit)
Characteristics:
Plate Voltage.......................................
Grid Voltage........................................
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90
-1.2
2500
12500
15
90
-5
90
-9
625
125
volts
volts
ohms
~mho8
ma
CASCO DE-TYPE AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE SUPPLY VOLTAGE with plate current of 0 ma ..................... .
PLATE VOLTAGE (Each unit) ......................................... .
GRID VOLTAGE, Negative-bias value (Each unit) ....................... .
CATHODE CURRENT (Each unit) ...................................... .
PLATE DISSIPATION (Each unit) ...................................... .
HEATER-CATHODE VOLTAGE:
Unit No.1: o
RMS voltage between cathode and heater ......................... .
Unit No.2:·
RMS voltage between cathode and heater" ........................ .
DC voltage between cathode and heater" .......................... .
. I O'
In a caBcode-tlipe circuit with the grid of the
yp,ca
perahon:
output unit connected to a voltage divider o
Supply Voltage .................................................... .
Plate Current ...................................................... .
Transconductance .................................................. .
Noise Figure* ...................................................... .
Grid Voltage (Approx.) for transconductance of 125 I'mhos .............. .
Input Voltage for croas-modulation factor of 0.01 and
transconductance of 125 I'mhos .................................. .
550 max
130 max
-50 max
22 max
1.8 max
volts
volts
volts
ma
watts
50 max
volts
50 max
130 max
volts
volts
T
180
15
12500
6.5
-9
volts
ma
,umhos
db
volts
500
mv
Maximum Circuit Values:
1 max meghom
Grid-Circuit Resistance (Each unit) .................................. .
Grounded-cathode input unit-pins 6, 7, and 8.
• Grounded-grid output unit-pins I, 2, and 3.
" Cathode positive with respect to heater.
° In order not to exceed the maximum-rated plate voltage when the cascode-type amplifier is controlled
it is necessary to use a voltage divider for the grid of the grounded-grid output unit.
* Measured with tube operating in a television tuner.
o
HIGH-MU TWIN TRIODE
Miniature type used in high-gain,
resistance-coupled, low-level audioH
amplifier applications where low-hum
and non-microphonic characteristics
KT,
are important considerations, such as
in microphone amplifiers and in preamplifiers for mono- and stereophonic phonographs. Outline BB, OUTLINES SECTION. Tube requires miniature nine-contact
socket and may be mounted in any position. For typical operation as a resistancecoupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION.
6EU7
HEATER VOLTAGE (AC/nc) .........................•..................
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Each Unit, Approx.):
Grid to Plate .................................................. .
Grid to Cathode and Heater ..................................... .
Plate to Cathode and Heater ................................... "
0.3
volts
ampere
1.5
1.6
0.2
pf
pf
pf
6.3
257
RCA Receiving Tube Manual
EQUIVALENT NOISE AND HUM VOLTAGE (Referenced to Grid, Each Unit):
Average Value*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 8 microvolts rms
* Measured in "true rms" units under the following conditions: Heater volts (ac), 6.3; center-tap of
heater transformer grounded; plate supply volts, 250; plate load resistor, 100000 ohms; cathode resistor,
2700 ohms; cathode bypass capacitor, 100 I'f; grid resistor, 0 ohms; amplifier frequency range, 25 to
10000 cps.
CLASS Al AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ............. " .... " ............................... .
GRID VOLTAGE:
Negative-bias value ............................................ .
Positive-bias value ............................................. .
PLATE DiSSiPATION ................... '" '" ... '" ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......................... .
Heater positive with respect to cathode ........................... .
The dc component must not exceed 100 volts.
330 max
volts
-55 max
1.2 max
volts
volts
watts
200 m1X
200· max
volts
volts
o max
Characteristics:
Plate Voltage .......................................... .
Grid Voltage .......................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .........................•.................
100
-1
100
80000
1250
0.5
250
-2
100
62500
1600
1.2
volts
volts
ohms
"mhos
ma
AVERAGE PLATE CHARACTERISTICS
tACH UNIT
'"
TYPE 6EU7
£~ =6.3 VO~TS
If/- l
.;1 /
~4i-W
,
3
t!
{JI
!j 1/ !/ 1/ :y
2
I
I
/ / / if/ if/ ..5'I
II
I
II
J
J
J
:",.
V
J
,It)'"
/ / i/ V V V V V l7'
1(/ V
o
VVV
100
200
~!-
V ... l0V . . . . ~
300
400
P~ATE VO~TS
500
92C",",0470T
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as combined Pr
triode oscillator and pentode mixer in
Related type:
television receivers. Outline 8B, OUT5Eua
LINES SECTION. Tube requires min- Gr
iature nine-contact socket and may be
operated in any position. Heater volts
(ac/dc), 6.3; amperes, 0.45; warm-up time (average), 11 seconds.
6EU8
8
Kp,G3p'!s
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ................ .
GRID-No.2 VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ..................................... .
258
Triode
Pentode
Unit
330 max
Unit
330 max
volts
330 max
volts
See curve page 70
o max
volts
3.1 max
watts
o max
3 max
========= Technical Data =========
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts .............. .
For grid-No.2 voltages between 165 and 330 volts ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
0.55 max
watt
See curve page 70
200 max
2000 max
200 max
2000 max
volts
volts
150
125
125
-1
volts
volts
volt
ohms
80000
6400
-9
12
4
ohms
I'mhos
volts
rna
rna
seconds
Characteristics.
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Grid-No.1 Voltage ...................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a ...... .
Plate Current .......................................... .
Grid-No.2 Current .................................... ..
Cathode Warm-up Time- .............................. ..
56
40
5000
8500
-12
18
35
Maximum Circuit Values:
':0
:
0.1 max
Grid-N o.l-Circuit Resistance ............................ .
0.1 max megohm
100 volts.
- The cathode warm-up time is defined as the time required for the transconductance to reach 6500
I'mhos when the tube is operated from a cold start with dc plate volts=100, grid volts=O, and
heater volts= 5. 5.
° The dc component must not exceed
SHARP-CUTOFF TETRODE
5P
H
G2
3
b
K
IS 2
I
K
7 IS
GI
Miniature type used as rf amplifier in vhf tuners of television receivers.
Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact
socket and may be operated in any
position. Heater volts (ac/dc), 6.3;
amperes, 0.2.
6EV5
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No 2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
CATHODE CURRENT ................................................. .
GRID-No.2 INPUT:
For grid-N 0.2 voltages up to 90 volts ............................ ..
For grid-No.2 voltages between 90 and 180 volts ................... .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
275 max
180 max
volts
volts
See curve page 70
o max
volts
20 max
rna
0.2 max
watt
See curve page 70
3.25 max
watts
100 max
100oma.x
volts'
volts
Characteristics:
Plate Voltage ...................................................... .
Grid-No.2 Voltage .................................................. .
Grid-No.1 Voltage .................................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Plate Current ...................................................... .
Grid-No 2 Current ................................................ ..
Grid-No.1 Voltage (Approx.) for transconductance of 100 I'mhos ......... .
250
80
-1
0.15
8800
11.5
0.9
-4.5
volts
volts
volt
megohm
I'mhos
rna
rna
volts
Maximum Circuit Value.
Grid-No.1-Circuit Resistance ........................................ .
° The dc component must not exceed 50 volts.
0.5 max
megohm
H
HIGH-MU TWIN TRIODE
Miniature type used as a relaycontrol tube in remote-control tuning
units of television receivers. It is procKTI essed specifically for operation under
PT2
standby conditions. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position.
KT2
6EV7
259
RCA Receiving Tube Manual
HEATER VOLTAGE (AC/OC) ......................... .
HEATER CURRENT ................................ .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate ......................... .
Grid to Cathode and Heater ......................... .
Plate to Cathode and Heater ........................ .
6.3
0.6
Unit No.2
3.4
3
0.23
CLASS Al AMPLIFIER (Each Unit)
Characteristics:
Plate Vol tage ......................................................
Grid Voltage. .. . ..... ...... ... ...... .. ... .
. .................
Amplification Factor ............................ .
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . .
. ..................
Transconductance .......................................... .
Plate Current ......................................................
Grid Voltage (Approx.) for plate current of 100 I'a ................... .
.
.
.
.
RELAY-CONTROL SERVICE (Each Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Positive-bias value ................................... .
CATHODE CURRENT ............................................ .
PLATE DISSIPATION:
When "on" time exceeds 30 seconds in any 2-minute interval ........
When "on" time does not exceed 30 seconds in any 2-minute interval.
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...........................
Heater positive with respect to cathode ...........................
• The dc component must not exceed 100 volts.
Typical Operation with 2 SOO-Ohm-Relay Load;
With "on" time in any 2-minute interva':
Plate Supply Voltage ................................... .
Zero-bias Plate Current ................................. .
Grid Voltage (Approx.) for plate current of 100 I'a ......... .
250
-2
60
11500
5200
9.2
-9
volts
ampere
pf
pf
pf
volts
volts
ohms
J'mhos
ma
volts
300 max
o max
20 max
volts
volts
ma
.
.
2.5 max
4.5 max
watts
watts
.
.
200 max
200·max
volts
volts
30 seconds
or less
250
18.5
-9
More than
30 seconds
150
10
-5
volts
ma
volts
Maximum Circuit Value:
Grid-Circuit Resistance ............................................. .
3.9 max megohms
AVERAGE PI-ATE CHARACTERISTICS
EACH UNIT
TYPE bEV7
E.,=6.3 VOLTS
30
.'"ei
.
20
""
<$>Q
;-
•
3 20
i
..
0/
OV
:z
!c'"
~
../J
30
I0
oJ
0
/
/
/
/
/
J
/ i'
/ ;- '7
/
/
/
/ /
/
,"l
.// / /../r1
'l/::k::::: L..-:::: ~ ~ ~ ~ ~
./
,/
o
100
./
/ /
200
~
300
~oo
PLATE VOLTS
_9
000
92CW-I0393T
SHARP-CUTOFF PENTODE
~H
•
S P
Miniature type used in the gain- H 3
:::
controlled picture-if stages of vhf television receivers operating at an inter- K 2
Related types:
4EW6, SEW6
mediate frequency in the order of 40
I
megacycles per second. This tube feaGI
tures controlled plate-current cutoff and high transconductance (14000
6EW6
260
6 G2
7 G3
IS
~mhos)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Technical Data =;;;;;;;;;;=;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
combined with low interelectrode capacitance values. The 6EW6 is provided with
separate base pins for grid No.3 and cathode to permit the use of an unbypassed
cathode resistor to minimize changes in input conductance and input capacitance
with bias, without causing oscillation. Outline 7B, OUTLINES SECTION. Tube
requires miniature seven-contact socket and may be mounted in any position.
6.3
0.4
With
Ezternal
Shield'
O.OS maz
HEATER VOLTAGE (AC/DC) .... " . " .••..••.•.••••••..•••••.••.••.. " .•
HEATER CURRENT ••. " '" ..•.•••.•..•••••••..•• " ..••.• '" ••.••.• '"
Without
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ••• '" ••••••••...•. " .....•..•. '"
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3 and
Internal Shield .•.••..•..•..•.•.••..•.•...•........
Plate to Cathode, Heater, Grid No.2, Grid No.3, and
Internal Shield .•. " .••.••.•.•.•••••••..•.•......••
Eztet"nal
Shield
0.04maz
volts
ampere
pf
10
10
pf
2.4
S.4
pi
CLASS Al AMPLIFIER
Maximum Ratings, (Duign-Mazimum Values):
330 maz
volts
o maz
volts
330 maz
volts
See curve page 70
o maz
volts
3.1 maz
watts
PLATE VOLTAGE. • . . • . . . • . . • . . • . • . . • . . • . . . . . . . • ••...•.•..•..••••..•
GRID No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value .•.....• , ....•...
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .••....•....•.......••. " . "
GRID-No.2 VOLTAGE •.•.•••..•..•.•..•.•...•..•...............•.•...•
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ....•..•...•..•.•
PLATE DISSIPATION .•...•..•. " '" . " .•.. '" •..•.... , .•..•••. , .•• " ..
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volta ...•.......•..... " ...•..••..
For grid-No.2 voltages between 165 and 330 volts ...•....•.....•...•
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .•.•..•.•.........•.•..••.•.
Heater positive with respect to cathode ••...•••••.•.•.••.....••.•••
0.65 maz
watt
See curve page 70
200 maz
200limaz
volts
volts
Characteristics:
Plate Supply Voltage. • . • • . • • . . . • • • • • • . • • . . . • • . • . . . • • • • • . . • • • • • • • • • • •
125
volts
Grid No.3 .................................................. Connected to cathode at socket
Grid-No.2 Supply Voltage.. . .. . .. . .. . .. . .. . .. . .. . . . . .. .. . . . . . . . . . .. . .
125
volts
Cathode-Bias Resistor. • .. .. . .. • . .. . .. . .. . .. . . . . . . . .. . .. . .. . .. . • . .. ..
56
ohms
Plate Resistance (Approx.) . . . . .. . . . . .. • .. .. . . .. . .. . .. . .. . .. . .. . .. . . ..
0.2
megohm
Transconductance. • . . . . . • . . . . . . . . . • . . • . . . . . . . . . . . . . • . . . . . . . . . . . . . . . .
14000
I'mhos
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a..... .........•...
-3.5
volts
Plate Current... . .. .. . . .. ... . .. .. .. .. • .. . .. . .. . .. . .. . .. . .. • .. .. . .. . .
11
rna
8.2
rna
Grid-No.2 Current..................................................
With external shield connected to cathode.
• The dc component must not exceed 100 volt••
*
AVERAGE CHARACTERISTICS
2~
...
.
.-.,.....
..
l!1
.
•
Xb
II!
£4'=6.3 VOLTS
GRID N-3 AND INTERNAL SHIELD CONNECTED
TO CATHOOE AT SOCKET ..
GFtID-N-2 VOL.TS = 125
I
~ 20
I
i
\}
&
-0.7"
\
..
i<1 0
I
:!i
." "f)~J
"...
~
Ii
i
-0.&
"
Z
I
.,
ECI=-I
\
'-
rC2
-- -
-
~-
--
100
__ E9.'~
-1.&
Xb
--
If
o
I
I
GR,D .... ' VOLTS ECI=Oj
TYPE6EWb
200
PLATE VOLTS
-I
300
-
-2
400
92CM-996&TI
261
RCA Receiving Tube Manual
DUAL TRIODE
Neonoval type used as combined
vertical-deflection oscillator and vertical-deflection amplifier in television
receivers. Outline UB, OUTLINES
..,.
SECTION. Tube requires neonoval
2
nine-contact socket and may be operated in any position. For curve of average
plate characteristics, Unit No.1, refer to type 6DE7 (Unit No.1).
6EW7
HEATER VOLTAGE (AC/DC) .......................................•....
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Unit No.1
g~:~~~~~t~~ci~~nd'ii~~t~~::::::::::::::::::::::::::::::
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . • . . . . . . . .
CLASS Al AMPLIFIER
Characteristics:
Plate Voltage .......................................... .
Grid Voltage ........................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ..•............................•.......
Grid Voltage (Approx.) for plate current of 10 I'a .......... .
Grid Voltage (Approx.) for plate current of 100 I'a ......... .
Plate Current .......................................... .
PlateCurrentfor plate voltage of 60 volts and zero grid voltage
Plate Current for grid voltage of -25 volts ........••........
4.2
~j
Unit No.1
250
-11
17.5
8750
2000
-20
5.5
VERTICAL· DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 5ll5-line, SO-frame sllstem
Unit No. 1
Maximum Ratings, (Design-Maximum Values):
Oscillator
330 max
DC PLATE VOLTAGE .................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE-.......•............
PEAK NEGATIVE-PULSE GRID VOLTAGE .•...................
PEAK CATHODE CURRENT ..........•...... , .............. .
AVERAGE CATHODE CURRENT .•...........................
PLATE DISSIPATION ••....................................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..•.............
Heater positive with respect to cathode ...•............
-400 max
77 max
22 max
1.5 max
6.3
0.9
Unit No.ll
9
7
1.2
Unit No.2
150
-17.5
6
800
7500
-40
45
95
8
Unit No. it
AmplijUr
330 max
1500 max
-250ma",
175 max
50ma",
lOmax
volts
ampere
pf
pf
pf
volts
volts
ohms
"mhos
volts
volts
ma
ma
ma
volts
volts
volts
ma
ma
watts
volts
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For cathode-bias operation. . . . • . . . . . . . . . . . . • . • • . . . • . .
2.2 max
2.2 max megohms
For grid-resistor-bias operation........................
2.2 max
2.2 max megohms
• The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The dc component must not exceed 100 volts.
AVERAGE CHARACTERISTICS
TYPE GEW7
E f : &.3 VOLTS
o
50
100
150
200
250
300
350
400
PLATE VOLTS
262
<)ZCM-'''''T
========= Technical Data =========
p
~
BEAM POWER TUBE
Glassoctaltypeusedashorizontaldefiection
amplifier in television receivers. Outline 25A,
K 3
OUTLINES SECTION. Tube requires octal
G3
___
socket and should be operated vertically (base
--down or up) or horizontally with pins 2. and 7 in
H 2
7 H
a vertical plane. Heater volts (ac/dc) 6.3: amRelated type:
peres, 2.25. Characteristics as class Al ampli21EX6
8
fier: plate and grid-No.2 volts, 175: grid-No.1
G2
volts, -30; triode amplification factor, 4.2;
plate resistance (approx.), 8500 ohms: transconductance, 7700 I'mhos: plate rna., 67: grid-No.2 rna.,
3.3. Maximum ratings as horizontal-deflection amplifier: de plate volts, 770 max; peak positive-pulse
plate volts, 7000 max: peak negative-pulse plate volts, -1500 max: de grid-No.2 volts, 195 max: peak
negative-pulse grid-No.1 volts, -220 max: cathode ma., 770 max (peak), 220 max (average): plate dissipation, 22 max watts: grid-No.2 input, 3.5 max watts: peak heater-cathode volts, 200 max (the dc component must not exceed 100 volts). This type is used principally for renewal purposes.
GI
5
6EX6
BEAM POWER TUBE
Glass octal type used as vertical
deflection amplifier in television receivers. Outline 14E, OUTLINES
SECTION. Tube requires octal socket
and may be operated in any position.
Heatervolts (acj dc), 6.3 ;amperes,O.68.
6EY6
Related type:
7EY6
CLASS Al AMPLIFIER
Cha ra cteristics:
Plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 Voltage ...................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Grid-No.1 Voltage (Approx.) for plate current of 100 I'a ..... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
50
250
250
250
-17.5
60000
4400
-48
44
o
153"
21"
3
volts
volts
volts
ohms
I'mhos
volts
ma
ma
VERTICAL DEFLECTION AMPLIFIER
For operation in a 525-line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ................................................
PEAK POSITIVE-PULSE PLATE VOLTAGEo ...............................
GRID-NO.2 (SCREEN-GRID) VOLTAGE ..................................
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............
.
.
.
.
r~~~A~~TC~~:o~~R~~;:ENT: : : : :.: : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : :
PLATE DISSIPATION ................................................. .
GRID-NO.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
350 max
2500 max
300 max
-250 max
180 max
60 max
11 max
2.75 max
200 max
200·max
200 max
volts
volts
volts
volts
ma
ma
watts
watts
volts
volts
·C
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max megohm
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max megohms
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
° The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds .
• The dc component must not exceed 100 volts.
G!
5G,
~
P 3
H 2
--- 8
K
G3
7 H
BEAM POWER TUBE
Glass octal type used as vertical
deflection amplifier in television receivers. Outline 14E, OUTLINES
SECTION. Tube requires octal socket
and may be operated in any position.
Heater volts (acj dc), 6.3; amperes, 0.8.
6EZ5
263
RCA Receiving Tllbe Manllal
(LASS Al AMPLIFIER
Characteristics:
Plate Voltage ....... .
Grid-No.2 Voltage ..
Grid-No.1 Voltage ....
Plate Resistance (Approx.) . . . .
. ............ .
Transconductance ......... , .................... , ....... .
Grid-No.1 Voltage (Approx.) for plate current of 100 "a ..... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
60
250
0.,-
250
250
-20
50000
4100
volts
volts
volts
ohms
"mhos
volts
rna
rna
-50
18026-
43
3.5
VERTICAL DEFLECTION AMPLIFIER
For operation in a 525·line, 30-frame s1lstem
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ..... , ..........................................
PEAK POSITIVE-PULSE PLATE VOLTAGEo ...............................
GRID-No.2 (SCREEN-GRID) VOLTAGE ..................................
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............
PEAK CATHODE CURRENT ...........................................
.
.
.
.
.
.
.
350 max
2500 max
300 max
-250 max
260 max
75 max
12 max
2.75 max
volts
volts
volts
volts
rna
rna
watts
watts
.
.
.
200 max
200 ....ax
200 max
volts
volts
·C
AVERAGE CATHODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . • . . • . • . . . , .. .
PLATE DISSIPATION... . . . . ............. ... .. ...
. ..............
GRID-No.2 INPUT .... '" .... ... .........
. ....................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...........................
Heater positive with respect to cathode ...........................
BULB TEMPERATURE (At hottest point) ...............................
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max megohm
For cathode-bias operation. . . . . . . . . .
................
2.2 max megohms
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
° The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The de component must not exceed 100 volts.
6EZ8
HIGH-MU TRIPLE TRIODE
Miniature type used in oscillatormixer and afc service in FM receivers. PT3
Outline SB, OUTLINES SECTION.
Tube requires miniature nine-contact GT3
socket and may be operated in any
position. Heater volts (ac/ dc), 6.3; amperes, 0.45.
H
3
2
CLASS Al AMPLIFIER (Each Unit Unless Otherwise Specified)
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ............................................... .
GRID VOLTAGE:
Negative-bias value ........................................... ..
Positive-bias value. . . . . . . . . . . . . . . . . . . . . . . .
. ........ .
PLATE DISSIPATION... . ... .. . . . . ... ..... .. .....
. ............... .
TOTAL PLATE DISSIPATION (All plates)...........
. ............. .
HEATER-CATHODE VOLTAGE (Unit No.3):
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
330 max
volts
-50 max
o max
2 max
5 max
volts
volts
watts
watts
100 max
100 max
volts
volts
125
1
volts
volt
13600
4200
~mhos
4.2
volts
rna
Characteristics:
Plate Voltage ...................................................... .
Grid Voltage ..................................................... ..
Amplification Factor ................................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Grid Voltage (Approx.) for plate current of 20 "a ....................... .
Plate Current ...................................................... .
264
57
-4
ohms
========= Technical Data
P4
~
5N:
NC
3
HIGH-MU TRIODE
6FS
Metal type 6F5 and glass octal type 6F5GT used in resistance-coupled amplifter circuits. Outlines 3 and 15A, respectively, OUT2
7
H
H LINES SECTION. Tubes require octal socket
Related type:
1
8
and may be mounted in any position. Type
S:&F~
K
12F5GT
6F5-GT may be supplied with pin No.1 omitted.
NC:6F~-GT·
Heater volts (ac/dc), 6.3; amper.. , 0.3.Typical
operation as class AI amplifier: plate volts, 250 (300 max); grid volts, -2; amplification factor,100;
plate resistance (approx.), 66000 ohms; transconductance, 1500 I'hmos; plate ma., 0.9. Peak heatercathode volts, 90 max. Type 6F5-GT is a DISCONTINUED type listed for reference only. Type 6F5
is used principally for renewal purposes.
G24
~
6F5GT
5111
P 3
POWER PENTODE
6F6
6F6G
6F6GT
Metal type SFS and glass octal
types SFS-G and SFS-GT used in the
H 2
7 H
audio output stage of ac receivers.
5;&.6
1
8
16;6-(;
K
Tubes are capable of large power outNC \6F6- GT
G3
put with relatively small input voltage.
Outlines 5, 2S, and 14E, respectively, OUTLINES SECTION. Type SFS-GT may
be supplied with pin No.1 omitted. Tubes require octal socket and may be mounted
in any position. It is especially important that these tubes, like other powerhandling tubes, be adequately ventilated. Types SFS-G and SFS-GT are used
principally for renewal purposes. Heater volts (ac/dc), S.3; amperes, 0.7.
CLASS AI AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) VOLTAGE ............... '" .... .
PLATE DISSIPATION .................. '" ................ .
GRID-No.2 INPUT •........•..•..........................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .............. .
Heater positive with respect to cathode ............... .
Pentode
Triode
Connection Connection"
375 max
350 max
285 max
11 max
10 max
3.75max
90 max
90 max
Pentade
Connection
Typical Operation:
Plate Voltage ................................. .
Grid-N 0.2 Voltage ............................. .
Grid-No.1 (Control-Grid) Voltage ................ .
Peak AF Grid-No.1 Voltage ..................... .
Zero-Signal Plate Current ....................... .
Maximum-Signal Plate Current .................. .
Zero-Signal Grid-No.2 Current .................. .
Maximum-Signal Grid-No.2 Current ............. .
Amplification Factor ........................... .
Plate Resistance (Approx.) ...................... .
Transconductance . ............................ .
Load Resistance ............................... .
Total Harmonic Distortion ..................... .
Maximum-Signal Power Output ................. .
250
250
-16.5
16.5
34
36
6.5
10.5
80000
2500
7000
8
3.2
285
285
-20
20
38
40
7
13
78000
2550
7000
9
4.8
90 max
90 max
volts
volts
watts
watts
volts
volts
Triode
Connection'"
250
-20
20
31
34
volts
volts
volts
volts
ma
ma
rna
ma
6.8
2600
2600
4000
6.5
0.85
ohms
I'mhos
ohms
percent
watts
315
285
-24
48
62
80
12
19.5
10000
4
11
volts
volts
volts
.volts
ma
ma
ma
ma
ohms
per cent
watts
PUSH-PULL CLASS AI AMPLIFIER
Maximum Ratings: (Same as for class AI amplifier)
Typical Operation (Values are for two tubes):
Plate Voltage ................................................. " ... .
Grid-No.2 Voltage .......................................... '" ..... .
Grid-No.1 (Control-Grid) Voltage ... " ... '" ......................... .
Peak AF Grid-No.1-to-Grid-No.1 Voltage ............................. .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Effective Load Resistance (Plate-to-plate) ............... '.' ............ .
Total Harmonic Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
265
RCA Receiving Tube Manual
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For fixed-bias operation ...
For cathode-bias operation .. ~ ....
• Grid No.2 connected to plate.
0.1 mal'
o. 5 mal"
megohm
mpgohm
LOW-MU TRIODEREMOTE-CUTOFF PENTODE
Glass type adaptable to circuit design in
several ways. Outline 24B, OUTLINES SECTION. Heater volts (ac/dc), 6.3; amperes, 0.3.
Typical operation as class A 1 amplifier: pentode
unit~-plate volts, 250 max; grid-No.2 volts, 100;
grid-No.1 volts, -3; plate resistance, 0.85 megohm; transconductance, 1100 ",mhos; plate rna.,
6.5; grid-No.2 ma., 1.5; triode unit-plate volts,
100 max; grid volts, -3; amplification factor, 8; plate resistance, 0.016 megohm; transconductanct". 500
"mhos; plate rna., 3.5. This type is used principally for renewal purposes.
6F7
MEDIUM-MU TWIN TRIODE
6F8G
6FA7
Glass octal type used as voltage amplifier
or phase inverter in radio equipment. Outline23,
OUTLINES SECTION. Tube requires octal
socket. Except for the heater rating of 6.3 volts
(ac/dc) and 0.6 ampere and interelectrode capacitances, each triode unit is identical electrically with type 6J5. Type 6F8-G is used principally for renewal purposes.
DIODE-SHARP-CUTOFF,
TWIN-PLA TE TETRO DE
Miniature type used in frequencydivider and complex-wave generator
circuits of electronic musical instruments. Outline 8D, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be operated
in any position.
HEATER VOLTAGE (AC/DC) . . . . . . . . . . . . . .
HEATER CURRENT.. . . . . . .
. ... .
DIRECT INTERELECTRODE CAPACITANCES:
Tetrode Unit:
Grid No.1 to Plate A.. ...............
. .................. .
Grid No.1 to Plate B .................................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Internal Shield.
Plate A to Cathode, Heater, Grid No.2 ... ~ ....... ~ .... ~ ..
Plate B to Cathode, Heater, Grid No.2, and Internal Shield.
Tetrode Grid No.1 to Diode Plate ........... .
Tetrode Plate A to Diode Plate ... .
Tetrode Plate B to Diode Plate.
H
6.3
0.3
0.040
o 030 mar
5.5
1.8
1.8
0.022
0.020 max
0.055
volts
ampere
pf
pf
pf
pf
pf
pf
pf
pf
CLASS Al AMPLIFIER
Characteristics, (Tetrode Unit):
Plate A and Plate B connected together
Plate Voltage. . . . . . . . . . . . . . . ........ .
100
Grid-No.2 Voltage ..... .
100
Grid-No.1 Supply Voltage.
o
Grid-N 0.1 Resistor (Bypassed).
2.2
Plate Resistance (Approx.) ...
90000
Transconductance .....
3200
Plate Current.. . . .
. ......... .
3.8
Grid-N 0.2 Current ....................... .
1.7
Grid-No.1 Voltage (Approx.) for plate current of 20 pa.
-4
Using either Plate A or B, with unuBed plate grounded
Plate Voltage .... .
100
Grid-No.2 Voltage ... .
100
Grid-No.1 Supply Voltage ................... .
o
Grid-No.1 Resistor (Bypassed).
2.2
Plate Resistance (Approx.) ... .
130000
Transconductance ................ .
1900
Plate Current ......... .
2.2
Grid-N 0.2 Current. ... .
3
266
volts
volts
volts
megohms
ohms
p.mhos
ma
ma
volts
volts
volts
volts
megohms
ohms
;-
\
\
'"o
~
,..
"
I'"
2,
2
~ 0
V
-I
--
x: ~I t<:.:-
~~
o
100
~O.5
(C\:O
f..----:-0.5
-I
Ib
::
~I,,:O
200
-
--
-1.5
-2
300
400
PLATE VOLTS
2.5
i
500
DUAL TRIODE
Glass type containing high-mu
and low-mu triode units used as combined vertical-deflection oscillator and
Related type:
K
vertical-deflection amplifier in televi13FD7
Ta
sion receivers. Maximum dimensions:
over-all length, 2.9 inches; seated height, 2.62 inches; diameter, 1.188 inches. Tube
requires miniature nine-contact socket and may be mounted in any position.
Heater volts (ac/dc), 6.3; amperes, 0.925.
6FD7
CLASS A, AMPLIFIER
Characteristics:
Plate Voltage. . . . . . . . . . . . . ........................... .
Grid Voltage ........................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Unit No.1
250
-3
64
40000
1600
Unit No. jJ
60
150
0-17.5
6
800
- 7500
volts
volts
ohms
"mhos
267
RCA Receiving Tllbe Manllal
.4
Plate Current ....
Grid Voltage (Approx.):
For plate current o( 10 "a.
For plate current of 100 .u8.
Transconductance, for plate current of 1 rna.
Plate Current, (or grid voltage o( ~25 volts ..
rna
~5.5
volts
volts
.umhos
rna
~40
500
6
VERTICAL-DEflECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, SO-frame sllstem
Unit No.1
Maximum Ratings, (Design-Maximllm Vallles):
Oscillator
330 max
DC PLATE VOLTAGE.
PEAK POSITIVE-PULSE PLATE VOLTAGE-.
PEAK NEGATIVE-PULSE GRID VOLTAGE.
- 400
PEAK CATHODE CURRENT .....
70 max
AVERAGE CATHODE CURRENT.
20 max
PLATE DISSIPATION ...
1. 5 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode.
200 max
Heater positive with respect to cathode.
200"max
Unit No.2
Amplifier
330 max
1500 max
-250 max
175 max
50 max
10 max
volts
volts
volts
rna
rna
watts
200 max
200·max
volts
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For grid-resistor-bias or cathode-bias operation. . . .
2.2 max
2.2 max megohms
o This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
• The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, aO-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The dc component must not exceed 100 volts.
~G24
~GI
BEAM POWER TUBE
Glass octal type used in the audio
P 3
:::
output stages of compact stereophonic
H 2
7 H
phonographs and in radio and televiRelated type:
50FE5
sion receivers. Tube has high sensie
tivity at very low plate and screenK.G3
grid voltages; it can deliver relatively high power output at low values of plate
load resistance. Outline 14F, OUTLINES SECTION. Tube requires octal socket
and may be mounted in any position.
6FE5
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT ....... " ................ " ............... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate. . .. . ............................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 .... " ..... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ...... '" ...... .
6.3
1.2
volts
amperes
0.44
15
9
p(
p(
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ......... '" ............... '" . " ...... '" .. .
'" . " . " . " . " . "
GRID-No.2 (SCREEN-GRID) VOLTAGE. . . . ..
GRID-No.2 INPUT ................................•..................
PLATE DISSIPATION. . . . . . .
............
. .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
Typical Operation:
Plate Supply Vol tage ............. .
Grid-No.2 Supply Voltage ..
Grid-No.1 (Control-Grid) Voltage ....
Cathode-Bias Resistor ....
Peak AF Grid-No.1 Voltage ...
Zero-Signal Plate Current. .
. ........ .
Maximum-Signal Plate Current ................ .
Zero-Signal Grid-N 0.2 Current .................... .
Maximum-Signal Grid-No.2 Current ............... .
Plate Resistance (Approx.) ....................... .
268
Fixed
130
130
-12.5
Bias
145
145
-16
12.5
82
94
4
15
15
80
100
4
18
175
175
2.4
14.5
max
max
max
max
volts
volts
watts
watts
300 max
200"max
volts
volts
Cathode Bias
130 145
130 145
120 150
11.9 15.4
88
86
90
86
5 4.2
9
17
8000
volts
volts
volts
ohms
volts
rna
rna
rna
rna
ohms
-----------------" Technical Data ----------------AVERAGE PLATE CHARACTERISTICS
TYPE 6FE5
E.,= 6.3WLTS
GRID-H-. VOL.TS=O
100
/"
'2&
I..
IV
dZOO
100
~~
:I
...
~
GRiD-Ha, VOL.TS Eez:?$
~~
o
~
&0
L-
as
60
•
•
.ou
•
'20
PL.ATE VOLTS
Transconductance ............................... .
Load Resistance ................................. .
Total Harmonic Distortion . ...................... .
Maximum-Signal Power Output ................... .
220
1000 1000
12
15
4.2
5.6
MIl
9500
1000 1000
13
10
3.5 4.3
PUSH-PULL CLASS A. AMPLIFIER
Maximum Ratings: (Same as for class A, amplifier}
Typical Operation (Values are lor two tubes):
130
Plate Supply Voltage ................••..................
130
g~t~~~~a'!PK~~~~t.a~~:: ::: :::::::::::::::::::::::::::
75
25.8
Peak AF Grid-N o.l-to-Grid-N 0.1 Voltage ................. .
150
Zero-Signal Plate Current ............................... .
154
Maximum-Signal Plate Current .......................... .
7.2
Zero-Signal Grid-No.2 Current ........................... .
17
Maximum-Signal Grid-No.2 Current ...................... .
1600
Effective Load Resistance (Plate-to-plate) ................. .
6
Total Harmonic Distortion .............................. .
7
Maximum-Signal Power Output .......................... .
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ...................................... .
• The dc component must not exceed 100 volts.
145
145
75
28.8
160
172
8
20
1600
6
8.5
0.1 mao:
0.5 max
"mhos
ohms
per cent
watt.
volts
volts
ohms
volts
ma
ma
ma
ma
ohm.
per cent
watts
megohm
megohm
AVERAGE CHARACTERISTICS
J_
TYPE 6FE5
E.,=6.3VOLTS
GRlD-H- 2 VOLTS- 12&
0
0
GRID_NII.VOLTS E~O
\,.
I
/'
-~
l
',t
-'0
1'/
0
,.
~\
I'~
J
\
-20
)k: r--
o
20
"JA.
40
60
80
--
100
-
120
_Ec =0 -25
NO
- _ - - - _.01
160
PLATE VOLTS
II 0
200
269
RCA Receiving Tllbe Manllal
Refer to type EM84/6FG!>
6FG6
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
H
Miniature type used as combined
oscillator and mixer tube in vhf teleRelaled type:
vision receivers employing series-con5FG7
nected heater strings. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be mounted in any position. Heater volts
(ac/dc), 6.3; amperes, 0.45; warm-up time (average), 11 seconds.
6FG7
CLASS Al AMPLIFIER
Maximum Ratings, (Desi(1n·Maximum Vailles):
PLATE VOLTAGE ................ .
GRID-No.2 (SCR:;:EN-GRID) SUPPLY VOLTAGE.
GRID-No.2 VOLTAGE ....... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value-,
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volt •.
For grid-No.2 voltages between 165 and 330 volts.
Triode
Unit
330 max
Pentode
Unit
330 max
volts
330 max
vol ts
See curve page 70
o max
volts
o max
o 55
PLATE DiSSIPATION . . . . . . . . . ,
2 5 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .....
Heater positive with respect to cathode.
200 max
200 max o
max
watt
See curve page 70
3 max
watts
200 max
200 max"
volts
volts
Characteristics:
Plate Voltage ....
Grid-No.2 Volta!,:e .. .
Grid-No.1 Voltage ..... .
Amplification Factor .. .
Plate Resistance (Approx.) ....
Transconductance .. .
Plate Current ......... .
Grid-No.2 Current ............ .
Grid-No.1 Voltage (Approx.) for plate current of 30 I'a ..
" The de component must not exceed 100 volts.
6FH5
Related type.
2FH5,3FH5
125
-1
43
5700
7500
13
HIGH-MU TRIODE
Miniature type used as an rf amplifier in vhf tuners of television receivers. Outline 7B, OUTLINES
SECTION. Tube requires seven-contact socket and may be mounted in
any position.
HEATER VOJ,TAGE (AC/DC) .....
HEATER CURRENT ..... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate. . . .
. ...
Grid to Cathode, Heater, and Internal Shield ..
Plate to Cathode, Heater, and Internal Shield.
• With external shield connected to cathode.
Without
External
Shield
0.52
3.2
3.2
100
100
0
125
125
-1
volts
volts
volts
-180000
7400 6000
11
4
- -7.5
ohms
IJ.mhos
~
H4
H
rna
rna
volts
3
G 2
sP
b
IS
,7K
K
6.3
0.2
With
External
Shielde
0.52
3.2
4
volts
ampere
pC
pC
pI
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........ .
GRID VOLTAGE, Positive-bias value ..
CATHODE CURRENT ............. .
PLATE DISSIPATION .. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......... .
Heater positive with respect to cathode ..... .
270
150 max
o max
22 max
2.2 max
volts
volts
rna
watts
100 max
100 max
volts
volts
========= Technical Data =========
Characteristics:
Plate Voltage .. .
Grid Voltage ............................... .
Plate Resistance (Approx.) . . .. '"
......
. ......... .
Transconductance ............................ , . , .................. .
Plate Current ........................................ .
Grid Voltage (Approx.) for plate current of 100 "a ..
135
-1
5600
9000
volts
volt
ohm.
I'mho.
11
rna
-5.5
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For cathode-bias operation.
1 max
megohm
AVERAGE PLATE CHARACTERISTICS
,
TYPE bFHS
•
E.= b.3 VOLTS
,0
~
0
,
9-,Q;-
o
w
~
.
I
,
0
•
0
V
~'
V
/'
V
/
/'
l/ 1/
./
V V
"
[/
"eV
L>
./
/'
VV
V
./
kt:V
-/
V
.... ~~
V ~.
l-- :!, I--=/ ' . / / ' / ' V ..-/ / ' V
~
::::--/
~~
. /~ c:-: ~ ~ i - - ~ ::::::: ~ b::::: r::-:::: t::-,/
20
40
bO
80
100
./
V
-
I 0
I 0
IbO
PLATE VOLTS
180
Y
200
220
240
2bO
MEDIUM-MU TRIODETHR.EE-PLA TE TETRO DE
Miniature type used in complexwave generator applications. Sharpcutofftetrode unit has pairof additional
plates. Outline 8B, OUTLINES SECTION. Tube requires .nine-contact
socket and maybe mounted in any
position.
HEATER VOLTAGE (AC/DC) . . . . . • . . • . . . . . • • • . . . . . • • . . • . . . . . . . . . . . . . . . . .
HEATER CURRENT . . . . . . . . . . '" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6FH8
6.3
0.45
volts
ampere
1.4
2.6
1
pI
pI
pf
DIRECT INTERELECTRODE CAPACITANCES:o
Triode Unit:
Grid to Plate .................................................. .
Grid to Cathode and Heater ..................................... .
Plate to Cathode and Heater .................................... .
Tetrode Unit:
Grid No.1 to Plate No.2 ......... '" ..................... '" .... .
Grid No.1 to Cathode,Heater, Grid No.2, Plate No.1A, and Plate No.1B
Plate No.2 to Cathode, Heater, Grid No.2, Plate N o.lA, and Plate N o.lB
Tetrode Grid No.1 to Triode Plate ................................... .
Tetrode Plate No.2 to Triode Plate ................................... .
° With external shield connected to cathode.
0.06 max
4.5
1.4
0.35 max
0.008 max
pI
pI
pI
pI
pI
CLASS A, AMPLIFIER
Characteristics:
Triode Unit
Plate Voltage. .......... .. . ........ ... ...... ............ ............
100
Grid Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ••. . . . . . . . . . . . . . . . . . . . .
-1
Amplification Factor. . . . . . . . . . . . . . . . . . . . . . . . . . . • • . . . . . . . . . . . . . . . . . . .
40
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7400
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5400
Plate Current .............................................. " . . . . . . .
7.9
Grid Voltage (Approx.) for plate current of 100 "a. . . . . ....... ... .......
-7
Tetrode Unit with Plates No.lA and No.lB Connected to Cathode at Socket
Plate-No.2 Voltage.. ... ............ ............... ... ... ...... ... ...
250
Grid-No.2 Voltage... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
250
volts
volt
ohms
I'mhos
rna
volts
volts
volts
271
RCA Receiving Tllbe Manllal
-2
Grid-No.1 Voltage ..... " '" ... .
Plate-N 0.2 Resistance (Approx.) ............. .
Transconductance, Grid No.1 to Plate No.2 ... .
Plate-N 0.2 Current ........ .
Grid-No.2 Current ........................................ .
Grid-No.1 Voltage (Approx.) for plate-No.2 current of 100 I'a ... .
0.75
4400
7.3
1.4
-7
volts
megohm
~mho8
rna
rna
volts
COMPLEX-WAVE GENERATOR
Maximum Ratings, (Design-Maximum Values):
Triode Unit Tetrode Unit
volts
PLATE VOLTAGE .............. .
275 max
200 max
volts
PLATE-No.1 A VOLTAGE ... .
200 max
vol ts
PLATE-No.IB VOLTAGE ... .
275 max
volts
PLATE-No.2 VOLTAGE..
. .. ' .
275 max
volts
GRID-NO.2 (SCREEN-GRID) SUPPLY VOLTAGE .....
See curve page 70
GRID-No.2 VOLTAGE ............... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
volts
-40 max
-40 max
Negative-bias value ..... .
volts
o max
o max
Positive-bias value ... .
watts
1.7 max
PLATE DISSIPATION ....... .
0.3 max
watt
PLATE-No.1A DISSIPATION.
0.3 max
watt
PLATE-No.IB DISSIPATION.
watts
2.3 max
PLATE-No.2 DISSIPATION ...
GRID-No.2 INPUT:
o 45 max
watt
For grid-No.2 voltages up to 137.5 volts .............. .
See curve page 70
For grid-No.2 voltages between 137.5 and 275 volts ..... .
Typical Operation With Seporate Plote Operation (Tetrode Unit):
Plates-No.IA, No.IB, and No.2 Voltage.
. ........ .
Grid-No.2 Voltage ..... " ..
Grid-No.1 Voltage ....... '" ........ .
Plate-No.IA Current ............... .
Plate-No.lB Current. ....... '" .. , .. .
Plate-No.2 Current ...... .
Grid-!! 0.2 Current ......... .
Transconductance (Approx.):
Grid No.1 to Plate No.1A .. .
Grid No.1 to Plate No.IB .... .
Grid No.1 to Plate No.2 ..... .
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ........................ .
Triode Unit
0.5 max
100
50
-1
0.04
O.Ci
1.6
0.3
70
70
2500
\'olts
volts
volt
rna
rna
rna
rna
.u mho8
jJ.mholl
J.l.mhos
Telrode Unit
0.5 max megohm
Ie
MEDIUM-MU DUAL TRIODE
Duodecar type used as combi!1ed
vertical-deflection-oscillator and vertical-deflection-amplifier tube in television receivers. Outline 12B, OUTLINES SECTION. Tube requires duoH
H
decar twelve-contact socket and may be mounted in any position. Heater volts
(ac/dc), 6.3; amperes, 0.9.
6 FJ 7
CLASS Al AMPLIFIER
Characteristics:
Plate Voltage .. .
Grid Voltage ......... .
Amplification Factor ........ .
Plate Resistance (Approx.) .
Transconductance.
Plate Current ...................................... .
Grid Voltage (Approx.) for plate current of 10 I'a ..... .
Grid Voltage (Approx.) for plate current of 50 I'a ...... .
Unit No.1 Unit No.2
250
150
250
-8
o -9.5
22.5
- 15.4
9000
- 2000
2500
- 7700
8
6841
-18
-23
VERTICAL-DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 52.5-line, 20-frame system
Unit No.1
Maximum Ratings, (Design-Maximum Values):
Oscillator
DC PLATE VOLTAGE. " ................... .
350 max
PEAK POSITIVE-PULSE PLATE VOLTAGE- .... .
PEAK NEGATIVE-PUlSE GRID VOLTAGE ... .
-400 max
PEAK CATHODE CURRENT
AVERAGE CATHODE CURRENT ..
PLATE DISSIPATION .............. .
1 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ... .
200 max
Heater positive with respect to cathode .. .
200 'max
272
volts
volts
ohms
Ilmhos
rna
volts
volts
Unit No.2
Amplifier
550 max
2500 max
-250 max
150 max
50 max
10 max
volts
volts
volts
rna
rna
watts
200 max
200 'max
volts
volts
=========- Technical Data
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation,
,,,,,,' ,,,
2,2 max
2,2 max megohms
For cathode-bias operation.
2.2 max
megohms
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded,
• The duration of the voltage pulse must not exc€ed 15 per cent of one vertical scanning cycle. In a
525-line, SO-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
o The de component must not exceed 100 volts.
iC
KT2
DUAL TRIODE
Duodecar type used as combined
vertical-deflection oscillator and vertical-deflection amplifier in television receivers. The high-mu triode unit No.1
H
H
is used as an oscillator, and the lowmu triode unit No.2 is used as an amplifier. Outline 12B, OUTLINES SECTION.
Tube requires duodecar twelve-contact socket and may be mounted in any position. Heater volts (ac/dc), 6.3; amperes, 1.05.
6FM7
CLASS At AMPLIFIER
Characteristics:
Plate Voltage,
"" ,."" .. " .. ",
Grid Voltage, , , ' , ,
" "'" "" """'"
Amplification Factor, , , ' , , , , , ' , ' , , , , , , , , , , , , , , , ' , , , , , , , , ,
Plate Resistance (Approx.) , , , , , ' , , ' , , , , , , ' , , , ' , , , ' , , , , , , ,
Transconductance ...................................... .
Grid Voltage (Approx.) for plate current of 20 I'a, , ' , . , , , , , ,
Grid Voltage (Approx.) for plate current of 200 I'a""""" ,
Plate Current, , , ' , , , , , ' , , , , , , , , , , , , , , , , , , , , , , , , , . , , , , , , ,
Unit No.1
250
-3
66
30000
2200
-5.3
Unit No.2
175
-25
5.5
920
6000
2
-45
40
volts
volts
ohms
J.£rnhos
volts
volts
rna
VERTICAL-DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
Oscillator
DC PLATE VOLTAGE .. ," ., .. , ..... ' , '" .' , .,' '" .. ',., .,
350 max
PEAK POSITIVE-PULSE PLATE VOLTAGE#, " , " " " " " " ' "
PEAK NEGATIVE-PULSE PLATE VOLTAGE. , , . , ... , """""
PEAK CATHODE CURRENT, ... , , , . , , . , , . , . , , . , .. , , , , .... , .
1 max
Amplifier
550 max
1500 max
-250 max
175 max
50 max
10 max
volts
volts
volts
rna
rna
watts
200 max
200·max
200 max
200·max
volts
volts
-400 max
AVERAGE CATHODE CURRENT . . . . . • . . . . . . . . . . . . • . . . . . . . . . .
PLATE DISSIPATIONt, .. " , ... ". " .,' , ... , " .,'" .,'" .. ,
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode". , .. , . ' ... , , , ,
Heater positive with respect to cathode, , . , , . , . , . , , . , , .
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation, , . , , , . , , ... ' .. , ... , . , . , .
1 max
1 max megohm
For cathode-bias operation. , . , . ' , .. , . , , . , , , . , . , . , , .. ,
2.2 max
2.2 max megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
t An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
• The dc component must not exceed 100 volts.
H
TWIN DIODE-HIGH-MU TRIODE
Miniature type used as combined
FM detector and af voltage amplifier
in FM receivers. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
operated in any position. Heater volts
(ac/ de), 6.3; amperes, 0.45.
6FM8
TRIODE UNIT AS CLASS At AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE" , . , , .. , . , . , .. , .. , . , , .. , . , , , , .. , , , . , , . , ... , , ....... ,
GRID VOLTAGE, Positive-bias value ................................... .
330 max
o max
volts
volts
273
RCA Receiving Tube Manual
PLATE DISSIPATION .............. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode.
Heater positive with respect to cathode.
1.1 max
watts
200 max
2000 max
volts
volts
250
-3
volts
volts
70
58000
1200
1
ohms
Jjrnhos
Characteristics:
Plate Voltage .... .
Grid Voltage ....... .
Amplification Factor ... .
Plate Resistance (Approx.) .
Transconductance ....
Plate Current ....
rna
DIODE UNITS (Each Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE CURRENT ............... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with. respect to cathode ..
Heater positive with respect to cathode ........... .
5 max
rna
200 max
2000 max
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 20 rna.
° The de component must not exceed 100 volts.
HIGH-MU TRIODE
volts
H
~H4
sP
IS
Miniature type with frame grid
3
I>
used as rf-amplifier tube in vhf tuners
G z
I
7 II
of television receivers. Outline 7B,
OUTLINES SECTION. Tube reII
quires miniature seven-contact socket
and may be mounted in any position. Heater volts (ac/fox.) for transconductance of 1500 I'mhos ............. .
Input Resistance .................................................. .
Input Capacitance- ................................................ .
Noise FigureD ............................................... .
135
-1
78
5400
15000
11.5
-4.2
-2.5
275
11.2
4.7
volts
volt
ohms
I'mhos
rna
volts
volts
ohms
I'l'f
db
Maximum Circuit Values:
Grid-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max megohm
o With external shield connected to cathode, except as noted.
- With external shield and internal shield connected to ground.
- Measured at 200 Mc with heater volts = 6.3 and plate effectively grounded for rf voltages.
a For a neutralized triode amplifier at a frequency of 200 Me with signal source impedance adjusted
for minimum noise output.
AVERAGE PLATE CHARACTERISTICS
TYPE
6GK5
10
Et'''6.3 VOLTS
30
/
'"w
~ 25
'j" 20
w
..5
15
10
o
V
V
/
- ----1--100
1
--
~!.:I~
-l
- - J.
---zoo-- ---1--'.!+
ECI:I-Z.5
-I
400
300
PLATE VOLTS
92CM-103'OTI
HIGH-MU TRIODESHARP·CUTOFF PENTODE
Miniature type used in color and
black-and-white television receivers.
Triode unit is used as sync-separator,
Relaled types:
8GN8, IOGN8
sync-clipper, phase inverter, or soundif amplifier. Pentode unit is used in
output stage of video amplifier. Outline SD, OUTLINES SECTION. Tube requires
miniature nine-contact socket and may be operated in any position. For direct interelectrode capacitances, refer to type 6EBS; curve for aver~ge plate characteristics
of triode unit is same as for type 6EBS. Heater volts (acjdc), 6.3; amperes, 0.75.
6GN8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
Triode Unit Pentade Unit
330 max
330 max
volts
330 max
volts
See curve page 70
289
RCA Receiving Tube Manual
GRID-No.1 (CONTROL-GRID) VOLTAGIII, Positive-bias value .... .
PLATIII DISSIPATION ..................................... .
·GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ................ .
For grid-No.2 voltages between 165 and 330 volts ...... .
BlllAKHBATElI-CATHODIII VOLTAGIII:
Heater negative'with r..pect to cathode ............... .
Heater positive with respect to cathode ............... .
Charact.ristics:
Plate Supply Voltage ............................ .
Grid-No.2 Supply Voltage ........................ .
Grid-No.1 Voltage ............................••..
Cathode-Bias Resistor ........................••..
Amplification Factor ..........................••..
Plate Resistance (Approx.) ....................... .
Transconductance ............................... .
Grid Voltage (Approx.) for plate current of 20/,& .... .
Grid-No.1 Voltage (Approx.) for plate current of 100 "a
Plate Current ................................... .
Grid-No.2 Current .............................. .
"";;;0;;;;;;;;;0;;;;;;;;;0;;;;;;;;;0;;;;;;___
Omaz
Imaz
Omaz
5 maz
volt
watts
1.1 maz
watts
See curve page 70
200 maz
200"maz
Triode
Unil
250
60
150
0
-2
200 maz
200"maz
volts
volts
P.nlode
Unit
200
150
100
37000
2700
volts
volts
volts
ohms
100
ohms
"mhos
volts
volts
ma
rna
60000
11500
-5
-10
25
5.5
55·
18·
2
Maximum Circuit Values:
Triode
Pentode
Unit
Unit
Grid-No.l-Circuit Resistance:
For fixed-bias operation ......................••......
0.5 maz
0.25 maz megohm
For cathode-bias operation .......................... .
Imaz
Imaz megohm
• The de component must not exceed 100 volts.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
AVERAGE CHARACTERISTICS
..~
TYPE 6GN8
E f ·6.3 VOL T5
GRID - No, 2 VOLTS
::;
I
....
·I~O
~ 80
;;
N
~6 0
.;
z,
Q
i: 40
co
is
\E
\, /'" I--
,
lv~
-
~
It.- ~ I-50
r-
--
r. k--"' :-- -
17 V
GRID-No.1 VOLTS ECI-
1.
-I
~ I--"
21-
I-- ~
-
-3
-~
-.1-
~
100
t--
"--
"- -!,CI'O
-5
150
200
250
300
PLATE VOLTS
-400
350
nCM-IIOZIT
BEAM POWER TUBE
6GT5
••1..... Iype.:
12GTS. 17GTS
Novar type used ae a horizontaldeflection amplifier in television receivers. Outline 17A, OUTLINES
SECTION. Tube requires novar ninecontact socket and may be mounted in
any position; For curve of average characteristics, refer to type SGW6.
HBATElI VOLTAGE (AC/DC) .....................................•......
HBATElI CURRIIINT ..............•........•.............•................
DIRIIICT INTElIIIILIIICTRODIII CAPACITANCIII8 (Approx.):
Grid No.1 to Plate .....••...................••..................
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................•
290
6.3
1.2
volts
amperes
0.26
16
6.5
pf
pC
pf
========= Technical Data =========
CLASS Al AMPLIFIER
Characteristics:
Plate Voltage ................................... .
Grid-N 0.2 (Screen-Grid) Voltage .................. .
Grid-No.1 (Control-Grid) Voltage ................. .
Mu Factor, grid No.2 to grid No.1 ................ .
Plate Resistance (Approx.) ....................... .
Transconductance ............................... .
Plate Current ................................... .
Grid-No.2 Current .............................. .
Grid-No.1 Voltage (Approx.) for plate ma~l ....... .
Triode
Connection
150
150
-22.5
4.4
Pentode
Connection
60
250
150
150
o
-22.5
390*
32*
volts
volts
volts
15000
7100
70
2.1
-42
ohms
"mhos
rna
ma
volts
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a 5$5-line, 30-frame system
Maximum Ratings, (Design-Maximum Values):
DC PLATE SUPPLY VOLTAGE ......................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE- ............................... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ............................... .
DC GRID-NO.2 VOLTAGE ............................................ .
DC GRID-No.1 VOLTAGE ............................................ .
PEAK NEGATIVE-PULSE GRID-NO.1 VOLTAGE ........................... .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT............................ . ....... .
PLATE DISSIPATION" ......................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .................... .
Heater positive with respect to cathode. . . . . . ................... .
BULB TEMPERATURE (At hottest point) . . . . . . . . . . ................... .
770
6500
-1500
220
-55
-330
550
175
3.5
17.5
max
max
max
max
max
max
max
max
max
max
volts
volts
volts
volts
volts
volts
rna
rna
watts
watts
200 max
200 0 mtlx
240 max
volts
volts
°c
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For grid-resistor-bias operation-... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max megohm
* These values can he measured hy a method involving a recurrent waveform such that the plate dissipation and grid-No.2 input will not exceed their maximum ratings.
- The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
o The dc component must not exceed 100 volts.
MEDIUM-MU TWIN TRIODE
Miniature type usedin the matrixing circuits of color television receivers
employing series-connected heater
strings. Also used in phase-inverter,
multi vibrator, andgeneral-purposeamplifier applications. Outline 8D, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position.
6GU7
HEATER VOLTAGE (AC/DC)............................................
6.3
HEATER CURRENT...................................................
0.6
HEATER WARM-UP TIME (Average). . . . . . . . . . . . . . .
. . . . . . . . . . ..,
11
DIRECT INTER ELECTRODE CAPACITANCES (Approx.):
Unit No.1 Unit No.2
Grid to Plate. . . .... ............ .......... .
3
3
Grid to Cathode and Heater. . . . . . . . . . . . . . . . .
3.4
3.6
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . .
0.44
0.34
Plate of Unit No.1 to Plate of Unit No.2 ........................... 1
volts
ampere
seconds
pf
pf
pf
pf
CLASS Al AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ............................ .
GRID VOLTAGE, Positive-bias value ........... .
PLATE DISSIPATION ................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .... .
Heater positive with respect to cathode .. .
..........
330 max
o max
3 max
volts
volts
watts
200 max
200-max
volts
volts
Characteristics:
Plate Voltage ..
Grid Voltage ................ .
. .........
250
-10.5
volts
volts
291
RCA Receiving Tube Manual
17
5500
3100
-23
11.5
4
Amplification Factor ....................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance ........................... .
Grid Voltage (Approx.) for plate current of 50 /,a.
Plate Current ............. ' ................. .
Plate Current for grid voltage of -14 volts ........ .
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation .................. .
- Tbe de component must not exceed 100 volts.
ohms
/'mhos
volts
rna
rna
1 max megohm
AVERAGE PLATE CHARACTERISTICS
EACH UNIT
TYPE 6GU7
Ep 6.3 VOLTS
0
f!
we.,
...'"
",,<3':
1/
0
I
7
0
V
/
J
V
J
o
V
V
0
V
1/
50
/
/V
V
V
./V
VV
'00
V
- 'V
'50
200
I--V
250
V'
~
~ I-300
350
400
92CM-Jl966T
PLATE VOLTS
BEAM POWER TUBE
Duodecar type used as horizontaldeflection amplifier in television receivers. Outline 16C, OUTLINES
Related type:
SECTION. Tube requires duodecar
17GV5
twelve-contact socket and may be
mounted in any position. Heater volts Cae/de), 6.3; amperes, 1.2.
6GV5
CLASS A, AMPLIFIER
Cha ra cteristics:
5000
Plate Voltage ...
150
Grid-No.2 (Screen-Grid) Voltage ..
Grid-No.1 (Control-Grid) Voltage.
..........
Plate Resistance (Approx.) .
Transconductance.
Triode Amplification Factor ..
Pia te Current ....
...........
Grid-N 0.2 Current ......
-100
Grid-No.1 Voltage (Approx.) for plate current of 1 rna
60
150
0
345-
27-
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a 525-line, 30-frame system.
Maximum Ratings, (Design-Maximum Values):
DC PLATE SUPPLY VOLTAGE ....
PEAK POSITIVE-PULSE PLATE VOLTAGE#.
PEAK NEGATIVE-PULSE PLATE VOLTAG.E ...... .
DC GRID-No.2 VOLTAGE ..... .
292
250
150
-22.5
18000
.7300
4.4*
65
1.8
-42
770
6500
-1500
220
max
max
max
max
volts
volts
volts
ohms
}Lmhos
rna
rna
volts
volts
volts
volts
volts
========= Technical Data =========
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ........................ .
DC GRID-No.1 VOLTAGE ......................................... .
PEAK CATHODE CURRENT ......................................... .
AVERAGE CATHODE CURRENT ..................................... .
PLATE DISSIPATIONt ............................................. .
GRID-No.2 INPUT ............................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................ .
Heater positive with respect to cathode ........................ .
BULB TEMPERATURE (At hottest point) ............................ .
max
max
max
max
max
max
volts
volts
rna
rna
watts
watts
200 max
200· max
200 max
volts
volts
-330
-55
550
175
17.5
3.5
·C
Maximum Circuit Values.
Grid-No.1-Circuit Resistance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max
megohm
*Grid No.2 tied to plate; plate and grid-No.2 volts, 150; grid-No.1 volts, -22.5.
-This value can be measured by a method involving a recurrent waveform such that the maximum ratings of the tube will not be exceeded.
#The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
tAn adequate bias resistor or other means is required to protect the tube in the absence of excitation.
·The de component must not exceed 100 volts.
H
HIGH-MU TRIODEPOWER PENTODE
Miniature type used for sync-amplifier and video-output applications
in television receivers. Outline BE,
I
OUTLINES SECTION. Tube requires
PT
miniature nine-contact socket and may
be mounted in any position. Heater volts (ac/dc), 6.3; amperes, 0.9.
6GV8
CLASS At AMPLIFIER
Maximum Ratings, (Absolute-Maximum Values):
PLATE SUPPLY VOLTAGE ................................. .
PEAK PLATE VOLTAGE· ................................. .
DC PLATE VOLTAGE .................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
PEAK CATHODE CURRENT- .............................. .
AVERAGE CATHODE CURRENT ............................ .
GRID-No.2 INPUT ...................................... .
PLATE DiSSiPATION ..................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode . .............. .
Triode
Unit
550 max
250 max
200 max
15 max
Penrode
Unit
550 max
2000 max
250 max
550 max
250 max
volts
volts
volts
volts
volts
ma
rna
watts
watts
0.5 max
75 max
2 max
7 max
220 max
220 max
220 max
220 max
volts
50 65 170
170210 170
-1 -1 -15
volts
volts
volts
7
-25000
7500
200·240· 41
40· 50ez.7
I'mhos
ma
ma
volts
Characteristics.
Plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 Voltage ...................................... .
Amplification Factor .................................... .
Mu-Factor, Grid No.1 to Grid No.2 ...................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Plate Current .......................................... .
Grid-No.2 Current .................................... ..
100
-0.8
50
7600
6500
5
ohms
Maximum Circuit Values.
Grid-No.1-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . .
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max
1 max megohm
3 3 max
2.2 max megohms
o Maximum pulse duration 5 per cent of a cycle with a maximum of 1 millisecond.
- Maximum pulse duration 200 microseconds. If a larger tlyback is required, this value may be reduced
to 100 rna with a maximum pulse duration of 400 microseconds.
• This value can be measured by a method involving a recurrent waveform such that the maximum
tube ratings will not be exceeded.
293
RCA Receiving Tube Manual
~
G!P~GI
BEAM POWER TUBE
Glass octal type used as horizontaldeflection amplifier in high-efficiency
deflection circuits of television receivers. Outline 21, OUTLINES SECTION. Tube requires octal socket and
may be operated in any position.
6GW6
R.lated Iype"
12GW6,17GW6
NC
3
H 2
7 H
I
8
NC
K
G3
HEATER VOLTAGE (AC/IlC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................ .
6.3
1.2
volts
amperes
0.5
17
7
pf
pf
pf
250
160
volts
volts
volts
ohms
",mhos
ma
ma
volt.
CLASS Al AMPLIFIER
Characteristics.
Plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 Voltage ...................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 1 mao ..... .
60
160
o
-22.6
15000
7100
390*
32*
70
2.1
-42
HORIZONTAL-DEFLECTION AMPLIFIER
For operalion in a 5115-line, itO-frame 8fl81em
Maximum Ratings, (D.8ign-M"",imum Valu ..):
DC PLATE SuPPLY VOLTAGE ......................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE-............................... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE .............................. .
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ............................... .
DC GRID-No.1 (CONTROL-GRID) VOLTAGE .............................. .
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ........................... .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION· ...........................................•.....
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMI'ERATURE (At hottest point) ............................... .
770 maz
6500 m"'"
-1500 m"",
220m"",
-66m"'"
-330 maz
550 maz
176 ma",
3.6m"'"
17.5 m"",
volts
volts
volts
volts
volts
volts
ma
ma
watts
watts
200 ma",
200"maz
240 ma",
volts
volt.
1 maz
megohm
·C
Maximum Circuit Values:
Grid-No.I-Circuit Resistance:
For grid resistor-bias operation ................................. ..
AVERAGE CHARACTERISTICS
TYPE 6GW6
Ef 06.5 VOLTS
45o GRID-No.Z VOLTS"50
GRIO-No.1 VOLTS EC 00
400
V
~35 0
.. '0
~
~
I
0
:!.
.10.
eo
fx
~ 25
...
....
E
i
{ \1CZ
20
....
100ffi
:II
15 0
0
......
n:!
-15
J
I
r
294
10
.....
0-
10
...,
u
2'!:!,
::;
'r
_Izo _
"- -
EC -0
100
-
200
PLATE VOLTS
-
i
50N
•
z
-25
ZII ~
-t--
0
IV
Ii
========= Techl1ical Data =========
*
This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
a The dc component must not exceed 100 volts .
H~H4_::_:_5P
SHARP-CUTOFF PENTODE
6(;2
MiniaturetypeusedforFMsounddetector service in locked-oscillator,
K 2
1 (;3
quadrature-grid FM detector circuits,
Related type:
IS
I
as combined detector, limiter, and
5GX6
(;1
audio-voltage driver. Tube has two
independent control grids, and has controlled heater warm-up time for use in circuits employing series-connected heater strings. Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact socket and may be mounted in any position.
•
6GX6
HEATER VOLTAGE (AC/DC)............................................
HEATER CURRENT...................................................
HEATER WARM-UP TIME (Average)....................................
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode. Heater. GridNo.2. Grid No.3 •. and Internal Shield
Grid No.1 to Grid No.3 ........................................ ..
Grid No.3 to Plate ............................................. .
Grid No.3 to Cathode, Heater, Grid No.1.
Grid No.2. Plate. and Internal Shield ......................... .
6.3
0.45
11
volts
ampere
seconds
0.026
8
0.12
1.6
pf
pf
pf
pf
6.5
pf
150
volts
volts
volts
volts
ohms
megohm
j4mhos
"mhos
CLASS A, AMPLIFIER
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. ......... .
Grid-No.3 Supply Voltage. . . . . . . . . . . . . . . . . . .
. .......... .
Grid-No.2 Supply Voltage ........................................... .
g~\t-;'~~:~!~PK~i~~~t.a~~:
: :: :: :: : : :: :: :: : : :: :: : ::: : :: :: :: :: ::: :: :: : :
Plate Resistance (Approx.) .......................................... .
Transconductance. grid No.1 to plate ................................. .
Transconductance. grid No.3 to plate ................................. .
Plate Current ...................................................... .
Grid-N 0.2 Current. ................................................ .
Grid-N 0.3 Supply Voltage (Approx.) for plate current of 20 j4a ........... .
Grid-N 0.1 Supply Voltage (Approx.) for plate current of 20 j4a ... .
o
o
100
180
0.14
3700
750
3.7
3
rna
rna
-7
volts
volts
300 max
volts
-100 max
25 max
volts
volts
-4.5
FM SOUND DETECTOR
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE. " ................................................. .
GRID-No.3 (CONTROL-GRID) VOLTAGE:
Negative value (dc and peak ac) ................................. .
Positive value (dc and peak ac) .................................. .
AVERAGE CHARACTERISTICS
TYPE &GX6
Ef"6.3 VOLT5
GRID-No.3 VOLTS .. O
GRID-No.2 VOLTS"IOO
0
\
5
"
Il<'
/
........
...... . /
/'0
V
"-
o ,,'ls
....... J
t....-
t.
--
I---I--
I--
...-1
GRIO-No.l VOLTS ECl oO
'- [.::::.:: j....:::- ~ . IC2
~
Y'/ Y.
-
;;;=..<
~ <- -....... z 7~ f>c:::
~ ~ - --r- 'It--o
~
H
-0.5
-I
W
5
..J
IC2
50
100
150
Ib
-
-- 200
PLATE VOLTS
1-250
--2
300
92CM-lIQ02T
295
RCA Receiving Tube Manual
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
.GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
~:i~~~!:sv:!':. . '. '. '. :::::::::::::::::::::::::::::::::::::::::
PLATE DISSIPATION ................................................. .
GRID-No.3 INPUT .................................................. .
GRID-No.2 INPUT:
'For grid-No.2 voltages up to 150 volts ............................ .
For Itrid-N 0.2 voltages between 150 and 300 volts .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
volts
See curve page 70
300 maz
-50 maz
o maz
1.7 maz
0.1 maz
volts
volta
watts
watt
l.0 maz
watt
See curve page 70
200 maz
200-maz
volta
volta
Maximum Circuit Value..
.Grid-N o.3-Circuit Resistance ........................................ .
Grid-No.l-CircuitResistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
- The dc component 'must not exceed 100 volta.
0.68 maz . megohm
0.22 maz
0.47·maz
megohm
megohm
AVERAGE CHARACTERISTICS
TYPE 6GX6
Ef -6.3 VOLTS
GRID-No.2 YOLTS'IOO
GRID-No.1 VOLTS.O
0
5
.....-2
.....
,~
~
-•
1C2
-1--
-
2
I.....
r-=-- 'O-~ rEel'
..... ~!""'=='
"':o
~
p-<
.......
t- .;c!..
b:? ...:::.
>. . .
-
-
-~--- - -.....
51 L
/'"
~ -'"
II J
r
o
vr n..l~
-,
.J-+-±::
_,,0.3 ,.0
", ",
V
V
so
~
100
~
r.:;!. I--
ISO
200
250
PLATE VOLTS
300
SHARP·CUTOFF PENTODE
Miniature type used in gated-agcamplifier circuits. and as a noise-inverter tube in television receivers .
.Tube has two independent control
grids, and has controlled heater warmG
up time for use in circuits· employing series-connected heater strings. Outline 7B,
OUTLINES SECTION. Tube requires miniature seven-contact socket and may be
mounted in any position. For curves of average characteristics, refer to type 6G X6.
6GY6
HBATB8 VOLTAGE (AC/DC)............................................
HBATERCURRENT...................................................
HBATER WABM-UP TIME (AVERAGE). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECT INTERELBCTRODE CAPAClTANCI!l8:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater. Grid No.2. Grid No.8. and Internal Shield
Grid No.1 to Grid No.8 .......................................•..
Grid No.8 to Plate ..•...........................................
Grid No.3 to Cathode. Heater. Plate. Grid No.1.
Grid No.2. and Internal Shield .......................•........
.Charaderistici'
volta
ampere
seconds
0.026
8
0.12
l.6
pC
pC
pC
pC
6.5
pC
150
wlta
volta
volta
volts
ohms
megohm
"mhos
"mhos
ma
CLASS A, AMPLIFIER
Plate Supply Voltage ............................................... .
Grid-No.3 Supply Voltage ........................................... .
Grd-No.2 Supply Voltage ........................................... .
Grid.No.l Supply Voltage ........................................... .
Cathode-Biaa Reaiator ............................................. ..
Plate Reaiatance (Approx.) .......................................... .
Traneeonductance. Grid No.1 to Plate ................................ .
TranllCOnductance. Grid No.3 to Plate ................................ .
Plate Current ................•.................•....................
296
6.3
0.45
11
o
100
o
180
0.14
3700
750
3.7
=========- Technical Data
Grid-No.2 Current ................................................. .
Grid-N 0.3 Supply Voltage (Approx.) Cor plate current of 20 I'a ........... .
Grid-N 0.1 Supply Voltage (Approx.) for plate current of 20 I'a ........... .
-7
rna
volts
volt.
300 max
600 max
volt.
volts
3
-4.5
GATED AGC AMPLIFIER AND NOISE INVERTER
For operation in a 525-line, 3D-frame system
Maximum Ratings, (De8ign-Maximv.m Values):
PLATE VOLTAGE ...................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE- ................. .
GRID-No.3 (CONTROL-GRID) VOLTAGE:
Negative-bias value .......................................... .
Positive-bias value ........................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................ .
GRID-No.2 VOLTAGE ............................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value ............................................. .
Positive-bias value .................. , .......................... .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ............................ .
For grid-No.2 voltages between 150 and 300 volts .................. .
-100 max
volts
o max
volt.
300 max
volts
See curve page 70
-50 max
o max
1.7 max
volts
volt.
watts
1 max
watt
See curve page 70
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ... .
Heater positive with respect to cathode .... .
200 max
200 "max
volts
volts
Maximum Circuit Values:
Grid-N 0.3-Circuit Resistance ...................................... .
0.68 max megohm
Grid-No.1-Circuit Resistance:
For fixed-bias operation ....................................... .
0.22 max megohm
~""or cathode-bias operation ...................................... .
0.47 max megohm
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
" The de component must not exceed 100 volts.
HIGH-MU TRIPLE TRIODE
Miniature type used in rf-amplifier, mixer, and automatic-frequencycontrol service in FM radio receivers.
KTZ Outline 8B, OUTLINES SECTION.
Tube requires miniature nine-contact
GT3
PTz
socket and may be operated in any
position. Heater volts (ac/dc), 6.3; amperes, 0.45.
KTI
6GY8
CLASS AI AMPLIFIER
Value8 are for each unit. except as noled
Maximum Rating., (Design-Maximum Values):
PLATE VOLTAGE .................................................. .
GRID VOLTAGE, Positive-bias value ................................. .
PLATE DISSIPATION ............................................... .
TOTAL PLATE DISSIPATiON (All plates) ............................... .
PEAK HEATER-CATHODE VOLTAGE (Units No.1 and No.2):
Heater negative with respect to cathode ....... .
Heater positive with respect to cathode ........................ .
Characteristics:
Plate Supply Voltage. . . . . . . .......................... .
Grid Voltage ........................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor. . . . . . . . .. . ........................ .
Plate Resistance (Approx.) ....................... .
Transconductance ...................................... .
Plate Current .......................................... .
Grid Voltage (Approx.), for plate current of 20 I'a ......... .
TWIN DIODE
Unit
No.1
125
220
63
14000
4500
4.5
330 max
o max
2 max
5 max
volts
volts
watts
watts
100 max
100 max
volts
volts
Unit.
No.3
No.~or
125
-1
63
14000
4500
4.5
-4
volts
volts
ohms
ohms
pmhos
rna
volts
6H6
Metal type 6H6 and glass octal
type 6H6-GT used as detectors, lowH
6H6GT
voltag; rectifiers, and avc tubes. ExRelalod Iyp.,
cept for the common heater, the two
12H6
diode units are independent of each
other. For diode detector considerations, refer to ELECTRON TUBEAPPLICA297
RCA Receiving Tube Manual
TIONS SECTION. Type 6H6-GT is a DISCONTINUED type listed for reference only. Heater volts (ac/dc), 6.3; amperes, 0.3.
Maximum Ratings:
RECTIFIER OR DOUBLER·
PEAK INVERSE PLATE VOLTAGE .......................................... .
PEAK PLATE CURRENT (Per Plate) ....................................... .
DC OUTPUT CURRENT (Per Plate) ....................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................... .
Heater positive with respect to cathode .............. .
420 max
48 max
8 max
volts
rna
rna
330 max
330 max
volts
volts
150
40
8
volts
ohms
rna
Typical Operation As. Half-Wave Rectifler*:
AC Plate Voltage (Per Plate, rrns) . . . . . . . . . . . . . . . . . . . . . . . ..
Min. Total Effective Plate-Supply Impedance (Per Plate)". ...
DC Output Current (Per Plate) . . . . . . . . . . . . . . . . . . . . . . . . . . .
117
15
8
Typical Operation As Voltage Doubler:
Half-Wa ••
Full-Wave
AC Plate Voltage (Per Plate, rrns). . . . . . . . . . . . . . . . . . . . . . . .. 117
117
volts
Min. Total Effective Plate-Supply Impedance (Per Plate)O . . . .
30
16
ohms
ma
DC Output Current.. . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . .
8
8
• In half-wave service, the two units may he used separately or in parallel.
o When a filter-input capadtor larger than 40 JJ.f is used, it may be necessary to use more plate-supply
impedance than the value shown to limit the peak plate current to the rated value.
INSTALLATION AND APPLICATION
Types 6H6 and 6H6-GT require an octal socket and.may be mounted in any
position. Type 6H6-GT may be supplied with pin No.1 omitted. Type 6H6 max~
imum dimensions: over-all length, 1-3/4 inches; seated height, 1-3/16 inches;
diameter, 1-5/16 inches. Type 6H6-GT, Outline 14C, OUTLINES SECTION.
For detection, the diodes may be utilized in a full-wave circuit or in a halfwave circuit. In the latter case, one plate only, or the two plates in parallel, may be
employed. For the same signal voltage, the use of the half-wave arrangement will
provide approximately twice the rectified voltage as compared with the full-wave
arrangement.
For automatic volume control, the 6H6 and 6H6-GT may be used in circuits
similar to those employed for any of the twin-diode types of tubes. The only difference is that the 6H6 and 6H6-GT are more adaptable because each diode has its
own separate cathode.
~
H4
HIGH-MU TRIODE
H 3
/
___
6 IS
Miniature type used as rf-amplifier tube in vhf television tuners. OutK 2
7 K
line 7A, OUTLINES SECTION, exRelated type:
I
3HA5
cept vertical dimensions are 1/8 inch
61
shorter. Tube requires miniature sevencontact socket and may be mounted. in. any position. Heater volts (ac/ dc), 6.3;
amperes, 0.18.
6HAS
CLASS Al AMPLIFIER
Maltimum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ....... .
DC PLATE SUPPLY VOLTAGE ..
GRID VOLTAGE ...... .
CATHODE CURRENT .. .
220
600
-50
22
2.6
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .....
Heater positive with respect to cathode.
Characteristics and Typical Operation:
DC Plate Supply Voltage ..... .
Plate-Load Resistor. . . . .
. ........ .
298
Fixed Bias
135
135
max
max
max
max
volts
volts
volts
rna
watts
. .110 max
110 max
volts
volts
max
Cathode Bias
135
135
1000
5600
volts
ohms
========= Technical Data ======;;;;;;;;;;==
o
Internal-Shield Voltage .......................... .
DC Grid Voltage ................................ .
Cathode-Bias Resistor ........................... .
-1
Amplification Factor .. ........................... .
72
Transconductance . .............................. .
Plate Current ................................... .
DC Grid Current ................................ .
Grid-No.1 Voltage lor one-per-cent transconductance.
14500
11.5
0
-2.7
0
volts
volts
ohms
0
0
87
7:.;
80
1500 20000 14500
19
11.5
10
-5.3
-8.1
"mhos
rna
H
POWER PENTODE
6HB6
p
Miniature type used as vertical
deflection-amplifier tube in television
G2
receivers. Outline SE, OUTLINES
SECTION. Tube requires miniature
K
Gil
nine-contact socket and may be
mounted in any position. Heater volts Cae/de), 6.3; amperes, 0.76.
Related type:
15HB6
Characteristics:
Plate Supply Voltage ......................... " ..
Grid No.3 ...................................... .
Grid-No.2 Supply Voltage ........................ .
Grid-No.1 Voltage ............................... .
Cathode-Bias Resistor ........................... .
Mu-Factor, Grid No.2 to Grid No.1 ............... .
Plate Resistance (Approx.) ....................... .
Transconductance .............................. ..
Plate Current ................................... .
Grid-No.2 Current .............................. .
Grid-No.1Voltage(Approx.) for plate current of 100pa
60
250
250
volts
Connected to cathode at socket
250
volts
125
volts
ohms
33
100
33
28000
24000
ohms
20000
24000
"mhos
40
40
rna
4.2
6.2
rna
-6.4
-13
volts
250
0
150·
37·
VERTICAL-DEFLECTION AMPLIFIER
For operation in 525-line, SO-frame 8Y8tem
Maximum Ratings, (De8ign-Maximum Value8):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE o • • • • • • • • • • • • • . • • • • • • . • • • • • • • . • •
DC GRID-No.2 (SCREEN-GRID) VOLTAGE ............................... .
DC GRID-No.1 (CONTROL-GRID) VOLTAGE .............................. .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
max
max
max
max
max
max
volts
volts
volts
volts
watts
watts
200 max
200 "max
volts
volts
350
2500
300
-100
2
10
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
1 max megohm
2.2 max megohms
For cathode-bias operation ...................................... .
• This value can be measured by a method involving a recurrent waveform such that the maximum
tube ratings will not be exceeded.
o The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical-scanning cycle is 2.5 milliseconds.
" The de component must not exceed 100 volts.
P
Ne
BEAM POWER TUBE
Duodecar type used as verticalG2
deflection amplifier in television receivers. Outline 12D, OUTLINES
SECTION. Tube requires duodecar
H
H
twelve-contact socket and may be
mounted in any position. Heater volts Cae/de), 6.3; amperes, O.S.
6HE5
CLASS AI AMPLIFIER
Characteristics:
Plate Voltage ....................................... .
Grid-No.2 (Screen-Grid) Voltage ...................... .
60
250
250
250
volts
volts
299
RCA Receiving Tube Manual
Grid-No.1 (Control-Grid) Voltage. .....................
Plate Resistance (Approx.) ........................... .
Transconductance . .................................. .
Plate Current.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Current. .. ................................
Grid-No.1 Voltage (Approx.) for plate current of 100 I'a .. .
volts
ohms
I'mhos
ma
ma
volts
-20
50000
4100
43
3.5
-50
0
180·
20·
VERTICAL DEFLECTION AMPLIFIER
For operation in a 5ft5-iine,So-frame s1/stem
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ............................................. .
PEAK POSITIVE-PULSE PLATE VOLTAGE# ........................... .
GRID-No.2 VOLTAGE ............................................. .
PEAK CATHODE CURRENT ..........•...............................
AVERAGE CATHODE CURRENT ..................................... .
PLATE DISSIPATIONt ............................................. .
GRID-No.2 INPUTt .............................................. .
HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....................... .
Heater positive with respect to cathode '........................ .
BULB TEMPERATURE (At hottest point) ............................ .
350
2500
300
260
75
12
2.75
max
max
max
mav
max
max
max
volts
volts
volts
ma
ma
watts
watts
200 max
200-max
200 max
volts
volts
°c
Maximum Circuit Values:
Grid-N 0.1-Circuit Resistance:
For fixed-biao operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max
megohm
For cathode-bias operation ...................................
2.2 max
megohms
·This value can be measured by a method involving a recurrent waveform such that the maximum ratings of the tube will not be exceeded.
#The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a 525line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
tAn adequate bias resistor or other means is required to protect the tube in the absence of excitation.
-The de component must not exceed 100 volts:.
BEAM POWER TUBE
K
Duodecar type used as horizontal- G3
deflection amplifier in color television G2
receivers. Outline l6D, OUTLINES
SECTION. Tube requires duodecar
NC . /",----".-:"
twelve-contact socket and may be
H
mounted in any position. Heater volts (acl de), 6.3; amperes, 2.25.
6HF5
Characteristics:
CLASS AI AMPLIFIER
Plate Voltage. ...................................
Grid-No.2 (Screen-Grid) Voltage. ..... .............
Grid-No.1 (Control-Grid) Voltage ................. .
Triode Amplification Factor ...................... .
Plate Resistance (Appro x.) ....................... .
Transconductance . .............................. .
Plate Current ................................... .
Grid-No.2 Current .............................. .
Grid-No.1 Voltage (Approx.) for plate current of 1 ma
5000
125
70
125
o
-140
175
125
-25
3*
5600
11300
125
4.5
-54
volta
volta
volts
ohms
I'mhos
ma
ma
volts
900 max
7500"max
-1100 max
190 max
-250 max
1100 max
315 max
28 max
5.5 max
volts
volts
volts
volts
volta
ma
ma
watt.
watt.
200 max
200-max
225 max
volta
volt.
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a 5ft5-line, SO-frame s1/stem
Maximum Ratings, (Design-Maximum Values):
DC PLATE SUPPI,Y VOLTAGE ..................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE# (Absolute Maximum) ....... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ........................... .
DC GRID-No.2 VOLTAGE ........................................ .
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ....................... .
PEAK CATHODE CURRENT ....................................... .
AVERAGE CATHODE CURRENT ................................•....
PLATE DISSIPATIONt ............................................ .
GRID-No.2 INPUT .............................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....................... .
Heater positive with respect to cathode ....................... .
BULB TEMPERATURE (At hottest point) ........................... .
°c
Maximum Circuit Va:ue:
Grid-No.I-Circuit Resistance. . . ..................................
1 max
megohm
'Grid No.2 tied to plate; plate and grid-No.2 volts, 125; grid-No.1 volts, -25.
·This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
#The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
"Under no circumstances should this absolute value be exceeded.
tAn adequate bias resistor or other means is required to protect the tube in the absence of excitation.
-The de component must not exceed 100 volta.
300
========= Technical Data ========HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in color and
black-and-white television receivers.
The triode unit is used in high-gain,
Relat.d type:
IOHF8
sound-if stages and in sync-separator,
sync-clipper, and phase-inverter circuits; pentode unit is used as video-output amplifier. Outline 8D, OUTLINES
SECTION. Tube requires miniature nine-contact socket and may be operated in
any position. For curves of average characteristics, refer to type 6A W8-A for the
triode unit and to type 6EB8 for the pentode unit.
6HF8
HEATER VOLTAGE (AC/OO) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate .................................................. .
Grid to Cathode, Heater, Pentode
Cathode, Grid No.3, and Internal Shield ...................... .
Plate to Cathode, Heater, Pentode Cathode,
Grid No.3, and Internal Shield ............................... .
Pentode Unit:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2,
Grid No.3, and Internal Shield ............................... .
Plate to Cathode, Heater, Grid No.2,
Grid No.3, and Internal Shield ............................... .
Triode Grid to Pentode Plate ........................................ .
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ..................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ................ .
For grid-No.2 voltages between 165 and 330 volts ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Triode Unit
330 max
o max
1 max
6.3
0.75
volts
ampere
3.5
pf
2.8
pf
2.6
pf
0.1 max
pf
pf
10
pf
pf
4.2
0.015 max
Pentode Unit
330 max
volts
330 max
volts
See curve page 70
o max
volts
5 max
watts
1 . 1 max
watt.
See curve page 70
200 max
200-max
Characteristics:
Triode Unit
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
200
Grid-No.2 Supply Voltage ........................ .
Grid-No.1 Voltage ............................... .
-2
Cathode-Bias Resistor ........................... .
Amplification Factor ............................. .
70
Plate Resistance (Approx.) ....................... . 17500
4000
Transconductance ............................... .
Plate Current ................................... .
4
Grid-No.2 Current .............................. .
Grid-No.1 Voltage (Approx.) for plate current of 100 I'a
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a
-6
200 max
200-max
Pentode Unit
45
200
125
125
0
68
40·
15·
75000
12500
25
7
-9
volt.
volt.
volts
volts
volts
ohms
ohm.
I'mhos
rna
ma
volts
volts
Maximum Circuit Values:
Triode Unit Pentade Unit
Grid-No.I-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.5 max
0.25 max megohm
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max
1 max megohm
• This value can be ineasured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded .
• The dc component must not exceed 100 volts.
MEDIUM-MU TRIODESHARP·CUTOFF PENTODE
Pp
Miniature type with frame-grid
pentode unit used as combined osciIlator and mixer tube in vhf television
receivers. Outline 8B, OUTLINES
SECTION. Tube requires miniature
6HG8
301
RCA Receiving Tllbe Manllal
nine-contact socket and may be mounted in any position. Heater volts (ac/dc),
6.3; amperes, 0.34.
CLASS A, AMPLIFIER
Triode
Unit
126 max
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) VOLTAGE ....................... .
CATHODE CURRENT ..................................... .
PLATE DISSIPATION ................................ .
GRID-No.2 INPUT ...................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....... .
Heater positive with respect to cathode ... .
16 max
1.6 max
100 max
100 max
Pentotk
Unit
260 max
160 max
18 max
2 max
0.6 max
volta
volta
rna
watta
watt
100 max
100 max
volta
volta
Characteristics.
Plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 (Control-Grid) Voltage ............. '
Amplification Factor ................................... .
Mu-Factor, Grid No.2 to Grid No.1 ...................... .
Plate Resistance (Approx.) . . . . . .
. ............... .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
100
170
160
-1.2
volt.
volta
volts
70
0.35
12000
10
3.3
megohm
"mhos
ma
ma
-3
17
5600
14
Maximum Circuit Values.
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation ...................... .
0.5 max
0.26 max megohm
O. 6 max megohm
H
DIODESHARP-CUTOFF PENTODE
Miniature type used as combined
video-detector and if-amplifier tube in
television receivers employing seriesconnected heater strings. Outline SB,
9 03,.
OUTLINES SECTION. Tube reIS
quires miniature nine-contact socket and may be mounted in any position. Heater
volts (ac/dc), 6.3; amperes, 0.45; warm-up time (average), 11 seconds.
6HJ8
PENTODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Value.):
PLATE VOLTAGE ........................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .......... .
GRID-No.2 VOLTAGE ..
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ...... .
_GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ........... .
For grid-No.2 voltages between 166 and 330 volts ........... .
PLATE DISSIPATION .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ....
Heater positive with respect to cathode.
330 max
330 max
volts
volts
See curve page 70
o max
volts
o 55
max
watt
See curve page 70
3.2 max
watts
200 max
200 0 max
volts
volts
Characteristics.
Plate Supply Voltage .. .
Grid No.3 ............ .
. .... Connected
Grid-No.2 Supply Voltage ............... .
Cathode-Bias Resistor ...... .
Plate Resistance (Approx.) .. .
Transconductance .......... .
Plate Current ...
Grid-N 0.2 Current ....
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a ....
Grid-No.1 Voltage (Approx.) for plate current of 2 ma and
no cathode-bias resistor ...................................... .
302
125
volts
to cathode at socket
125
volts
56
ohms
0.2
megohm
9300
"mhos
11.5
rna
3.6
rna
-6
volts
-3
volts
========= Technical Data =========
Maximum Ratings, (Design-Maximum Values):
DC PLATE CURRENT.... . ..
. .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........ .
Heater positive with respect to cathode ........................ .
5 max
rna
200 max
200 'max
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 50 rna ............ .
, The dc component must not exceed 100 volts.
10
volts
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in television reKr ceivers employing series-connected
heater strings. The triode unit is used
PT
as a sync-separator or voltage-amplifier tube, and the pentode unit is used as a video if-amplifier, agc-amplifier, or reactance tube. Outline 8B, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be mounted in any position. Heater volts (ac/dc), 6.3;
amperes, 0.6; warm-up time (average), 11 seconds.
6 HL8
CLASS Al AMPLIFIER
Triode
Unit
330 max
Maximum Ratings, (Design Maximum Values):
PLATE VOLTAGE ......................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ................ .
GRID-No.2 VOLTAGE ...
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ..... .
PLATE DISSIPATION.
...........
o max
2 5 max
. ........... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts .............. .
For grid-No.2 voltages between 165 and 330 volts ....... .
.
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...
Heater positive with respect to cathode.
Pentode
Unit
330 max
330 max
volts
volts
See curve page 70
o max
volts
2.5 max
watts
0.55 max
watt
See curve page 70
200 max
200"max
200 max
volt.
volts
200 "max
Characteristics:
Plate Voltage ........................................... .
Grid-N 0.2 Voltage ...................................... .
Grid-N 0.1 Voltage ...................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) ............................... .
Transconductance ...................................... .
Plate Curren t ........................................... .
Grid-No.2 Current.
Grid-No.1 Voltage (Approx.) for plate current of 20 !la ...... .
125
-1
40
5000
7000
12.5
125
125
-1
volts
volts
volt
150000
10000
12
4.5
-7
ohms
.umhos
rna
rna
volts
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance.
• The de component must not exceed 100 volts.
H4
G3
1$
:
3
b
2
7
I
Ci,
megohm
SEMI REMOTE-CUTOFF
PENTODE
~
H
1 max
"2
K
Miniature type used as if-amplifier tube in FM receivers employing
series-connected heater strings. Outline 7B, OUTLINES SECTION. Tube
requires miniature seven-contact socket and may be mounted in any position.
HEATER VOLTAGE (AC IDe) ............ ............................... .
HEATER CURRENT .................................................. .
6HR6
Related type:
19HR6
6.3
0.45
volt.
ampere
303
RCA Receiving Tube Manual
HEATER WARM-UP TIME (A verage) ...................................
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate .............................................
Grid No.1 to Cathode, Heater, Grid No.2,
Grid No.3, and Internal Shield .................................
Plate to Cathode, Heater, Grid No.2, Grid
No.3, and Internal Shield .....................................
11
.
.
seconds
0.006 max
pf
.
8.8
pf
.
5.2
pf
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE SUPPLY VOLTAGE ............................................. .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE,Positive value .................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .................. .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value ............................................ .
Positive-bias value ............................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ............................ .
For grid-No.2 voltages between 150 and 300 volts .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
300 max
vol ts
o max
volts
300 max
volts
See curve page 70
-50 max
o max
3 max
volts
volts
watts
max
watt
See curve page 70
200 max
200 e max
vol ts
volts
AVERAGE CHARACTERISTICS
TYPE 6HR6
Ef· 6.3 VOLTS
GRID No.3 CONNECTED TO
CATHODE AT SOCKET.
GRID-No.2 VOLTS· 115
0
5
\~
01
-
I~
/'
GRID-No.1 VOLTS EC -0
0.5
/"
-I
. 1 ,.X
A
..
~
I0
5
0
~
'4
-1.5
-.
-
-2
Eel- O
Ib
-3
-5
-8
50
100
150
2.0
25<>
PLATE VOLTS
'"
-3!ID
4(10
'2CM-II5!OT
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid No.3 .................................................... Connected
Grid-No.2 Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . .
Grid-No.1 Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.1 Voltage (Approx.) for transconductance of 60 "mhos...........
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-N 0.2 Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
200
volts
to cathode at socket
115
volts
0
volts
68
ohms
0.5
megohm
8500
"mhos
-15
volts
13.2
rna
4.3
rna
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation.
. ................................... .
For cathode-bias operation ...................................... .
e The dc component must not exceed 100 volts.
304
o. 5
max megohm
1 max megohm
========- Technical Data ========H4
~
H
G3
3
b
2
7
IS
SHARP-CUTOFF PENTODE
:
Miniature type used as if-amplifier and limiter tube in FM receivers.
Outline 7B, OUTLINES SECTION.
Tube requires miniature seven-contact
socket and may be mounted in any position.
CO2
K
I
GI
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (AVERAGE) .................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2,
Grid No.3, and Internal Shield ................................. .
Plate to Cathode, Heater, Grid No.2, Grid No.3,
and Internal Shield ........................................... .
6HS6
Related type:
19H56
6.3
0.45
11
0.006 max
volts
ampere
seconds
pf
8.8
pf
5.2
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE SUPPLY VOLTAGE ............................................ .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive Value ................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value ... , ........................................ .
Positive-bias value ............................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ............................ .
For grid-No.2 voltages between 150 and 300 volts .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
300 max
volts
o max
volts
300 max
volts
See curve page 70
-50 max
o max
3 max
volts
volts
watts
max
watt
See curve page 70
200 max
200~ax
volts
volts
Characteristics:
150
volts
75
Connected to cathode at socket
75
75
volts
o
0
volts
68
68
ohms
50
megohm
0.5
9500
I'mhos
8.8
rna
2.8
rna
-4
volts
Plate Supply Voltage ................................... .
Grid No.3 ............................................. .
Grid-N 0.2 Supply Voltage ............................... .
Grid-No.i Supply Voltage ............................... .
Cathode-Bias Resistor .................................. .
Amplification Factor-................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-N 0.2 Current. .................................... .
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a ...... .
AVERAGE CHARACTERISTICS
TYPE 6HS6
E,,06.3 VOLTS
GRID No.3 CONNECTED TO
CATHODE AT SOCKET.
0
GR,OLNO., toLTS 'EClaO
GRID-No.2 VOLTS·75
~
/
5
\
N
.;
z
610
~
X-,
'"o
V
.Q
!:!
-0.5
:tb
-I
-- -- --
r--
.:~
5'" :,..-
- -- -
__ ECL~
-1.5
.
o
-2
50
100
150
zoo
PLATE VOLTS
Z50
-2.5
300
'ZCM-11483T
305
RCA-Receiving Tube Manual
Ma'ximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
• The de component must not exceed 100 volts.
• Triode connection (grid No.2 connected to plate).
O. 5 max megohm
1 max megohm
SHARP-CUTOFF TWIN PENTODE
Miniature type used in agc amplifier, sync, and noise-limiting circuits
Related types:
of television receivers. One pentode
3Hsa, 4Hsa
unit is used as combined sync separator and sync clipper; second pentode
G3Pt
unit is used as agc amplifier. Outline 8D, OUTLINES SECTION. Tube requires
miniature nine-contact socket and may be operated in any position.
6HS8
HEATER VOLTS (AC/DC) ............................................. .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.3 to Plate (Each Unit) ..... " ........................... .
Grid No.1 to All Other Electrodes ................................ .
Grid No.3 (Each Unit) to All Other Electrodes .................... .
Plate (Each Unit) to All Other Electrodes ......................... .
Grid No.3 (Unit No.1) to Grid No.3 (Unit No.2) ................... .
6.3
0.3
volts
ampere
2
6
3.6
3
0.015 max
pf
pf
pf
pf
pf
300 max
volts
CLASS A, AMPLIFIER
Maximum RQlings, (Design-Maximum Values):
PLATE VOLTAGE (Each Unit) ........................................ .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE (Each Unit):
Peak positive value ............................................. .
DC negative value ............................................. .
DC positive value .............................................. .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Negative-bias value ............... .
CATHODE CURRENT ................................................. .
PLATE DISSIPATION (Each Unit) ..................................... .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
Characteristics:
With One Unit Operating·
Plate Voltage .......................................... .
Grid-No.3 Voltage ...................................... .
50
-50
3
150
-50
12
1.1
0.75
100
max
max
max
max
max
max
max
max
watts
watt
200 max
200·max
volts
volts
100
volts
volts
o
o
AVERAGE CHARACTERISTICS
TYPE GHS8
E f : 6.3 VOL T5
GRIO~l..1 VLTS IE~
GRID - No.3 VOL T5-0
GRID - No.2 VOLTS ~ 67.5
PLATE AND GRID No.3 OF
OTHER UNIT GROUNDED,
4
3
V
~ V'
2
~ '/
,A~ ;:.::..I-V
P
~
o
V
V
V
I-;:-':'
,~ ~
:;..::- ::..::-' ~-
--
I-- l -
-
-
- -- -
GRIO-N!.I
- -
0.5
0.5
O·L
1
0
M~L!;'AM~ERE! !CI.~.J
-0.5
T
-
Ec,--I
-1.5- f--
-2
100
200
PLATE VOL T5
306
- - --
300
400
nc~-
IIO-:nT
volts
volts
volts
volts
volts
rna
========= Technical Data =========
Grid-No.2Voltage.......................................
Grid-No.1 Voltage... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance, Grid-N 0.3-to-Plate .................... .
Transconducta..ee, Grid-N o.l-to-Plate. . . . . . . . . . . . . . . . . . . . .
Plate Current .......................................... .
Grid-No.3 Voltage (Approx.) for plate current of 100 "a ..... .
Grid-No.1 Voltage (Approx.) for plate current of 100 "a ..... .
67.5
0
67.6
volt.
volt.
"mho.
"mho.
rna
volts
volt.
0
450
11 00
2
-3.6
-2.3
With Both Unit. Operating
Plate Voltage (Each Unit)... . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.8 Voltage (Each Unit). . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Voltage... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.1 Voltage ...................................... .
Plate Current (Each Unit) .............................. .
Grid-N 0.2 Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cathode Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
100
-10
67.5
100
0
67.5
7
7.1
2
4.4
8.5
volt.
volts
volts
volts
rna
rna
rna
0
Maximum Circuit Values:
Grid-No.8-Circuit Resistance (Each Unit) ............................. .
Grid-No.1-Circuit Resistance ........................................ .
• The de component must not exceed 100 volts.
• With plate and grid No.3 of other unit connected to ground.
o Adjusted to give grid-No.1 current of 0.1 milliampere.
O. 5 max
O. 5 max
megohm
megohm
AVERAGE CHARACTERISTICS
2. 5
TYPE 6HS8
Ef .6.3 VOLTS
GRID-No.2 VOLTS -67.5
GRID-No.1 MILLIAMPERES -0,1
PL~~~ ~~8::~O. 3 O~T~
V
Ll.·~J.- V t;:-
"-"/ / V
.iI1 717 [/
~I.
'"
~
5
fj
I
V
. 17 7
o. 5
7
o
II
/'
./
100
V
1
.......
V
./
V
,.,V
.....~
1PJ-~c3f
V
./
J
V
--
V
/'
..I
200
V
V
11
V
./
~
V
/
/
II
~O'
I
-j
17 7
J
./
/
,:y
oJ
~
V
/
)
oJ
V
./
i
'"
!<
1..--1-
:::;....
,,,/
j
V
J
)
17
V
V
;J
Lv
V
400
300
PLATE VOLTS
SHARP-CUTOFF PENTODE
Miniature type used as sound-detector tube in FM and television receivers employing series-connected
heater strings. Tube has two independent control grids. Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contact socket and may be
mounted in any position.
6HZ6
HEATER VOLTAGE (AC/DC) ............. .
HEATER CURRENT ..... .
HEATER WARM-UP TIME (average) ..
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate.
. ........ .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No. 3,andlnternal Shield
Grid No.1 to Grid No.8 .................................. .
6.3
0.45
11
volts
ampere
seconds
0.023
8.2
0.09
pf
pf
pf
307
RCA Receiving Tube.Manual
Grid N o.S to Plate ............................................. .
Grid No.S to Cathode, Heater, Grid No.1, Grid No.2, Plate, and
Internal Shield ............................ " .................. .
1.6
pf
7.2
pf
150
0
100
0
180
0.11
3400
600
3.2
3.2
-7
-4.5
volts
volts
volts
volts
ohms
megohm
"mhos
"mhos
rna
rna
volts
volts
CLASS A, AMPLIfiER
Characteristics.
Plate Supply Voltage ............................................... .
Grid-No.3 Supply Voltage ........................................... .
Grid-No.2 Supply Voltage ........................................... .
Grid-No.1 Supply Voltage ........................................... .
Cathode-Bias Resistor .............................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance, Grid No.1 to Plate ................................ .
Transconductance, Grid No.3 to Plate ................................ .
Plate Current ...................................................... .
Grid-No.2 Current ................................................ ..
Grid-No.3 Supply Voltage (Approx.) for plate current of 20 "a ........... .
Grid-No.1 Supply Voltage (Approx.) for plate current of 20 "a ...... .
FM SOUND DETECTOR
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ............................................... .
GRID-No.3 (CONTROL-GRID) VOLTAGE:
Negative value (dc and peak ac) ............................. .
Positive value (dc and peak ac) .................................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value ..................... ; .................. .
Positive-bias value ........................................ .
PLATE DISSIPATION ............................................ .
GRID-No.3 INPUT ............................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ............................ .
For grid-No.2 voltages between 150 and 300 volts .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
300 max
volts
volts
-100 max
25 max
volts
300 max
volts
See curve page 70
-50 max
o max
1.7 max
0.1 max
volts
volts
watts
watt
1 max
watt
See curve page 70
200 max
200~ax
volts
volts
Maximum Circuit Values.
Grid-N o.S-Circuit Resistance ........................................ .
Grid-No.1-Circuit Resistance:
For fixed-bias operation ................................ .
For cathode-bias operation ............. .
-The dc component must not exceed 100 volts.
0.68 max megohm
0.22 max megohm
0.47 max megohm
AVERAGE CHARACTERISTICS
TYPE 6HZ6
E,' 6.3 VOLTS
GRIO-No.3 VOLTS =0
GRIO-No.2 VOLTS=IOO
0
...........~Ct·o
0
...... -:,
c--5
,
"
~
-,
....
<
......
./'
k~$ L
roo
~~ 1><: ~
(;, t>;; """" -
o
308
:e
->
I
-~
:::::"'- .....,:C2_
0
.-=t
GRIOeN .., VOLTS Ec,·-o.5
- - - -IC2
Ib
-
f-1--I
1-- --.. 1--r---
-2
50
100
150
zeo
PLATE VOLTS
250
300
92CM-11792T
========= Technical Data =========
AVERAGE CHARACTERISTICS
TYPE 6HZ6
E f =6.3 VOLTS
GRID-No.2 VOL
=100
GRID-No.1 VOLTS =0
rs
5
.......
I---' ~
<
I
17' 1---
7V
V
o
-- -- -- - -I-~
-4
>C"
V
1---
f-C,'°....l-
I--~2':':;:":- c:::::
1C2
FJ::J ;:.;-;:::.=
,,0l-1Sf-~
1--
~
~ .:i- ..::!!~
V
./
50
100
150
200
~
250
300
PLATE VOLTS
p~G
2
MEDIUM-MU TRIODE
7
8K
92CM-II793T
6J5
6J5GT
Metal type 6J5 and glass octal
type 6J5-GT used as detectors, ampli-
3
::6JSI
1-_
2
__
tn
1C2
-r--
~--
"~c~·o
r'--.
0
5
--"
~~~eo:;~!li:!~~~!~f:~!~a~~~:~:~:~
H
Related type:
12J5GT
ance together with comparatively
high amplification factor. Outlines 2 and 14C, respectively, OUTLINES SECTION.
Tubes require octal socket and may be mounted in any position. For typical
operation as resistance-coupled amplifiers, refer to RESISTANCE-COUPLED
AMPLIFIER SECTION. Type 6J5-GT is used principally for renewal purposes.
eC:6JS-GT
HIilATER VOLTAGE (AC/nc)................................................ 6.3
HEATER CURRENT....................................................... 0.3
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
6J5*
6J5-GT**
Grid to Plate. . • • . . . . . . • . • • . . . . . . . . . . . • • • • . . . • . . . • . . . . 3.4
38
Grid to Cathode and Heater. . . . .. . .. . .. . .. . .. . . .. . . . .. 3.4
4.2
Plate to Cathode and Heater. . . . . . . . . . .. . .. . . . . . . . . . . . 3.6
5.0
Shell connected to cathode.
'*Base sleeve and external shield connected to cathode.
AVERAGE PLATE CHARACTERISTICS
*
•
II
TYPE 6J!'>
E f=6,3 VOLTS
volts
ampere
pf
pf
pi
II
0
.....
.":.
•
::;
oJ
.,"y)
2
'/'j
.)
7 7 I'll
1/
8
r; 1/
17;y
J J J J J ,:,1
~
W
'l
/ / / 7 7~?j17
..
~
oJ
4
)
J
J
J /
)
~I
!
/ / /
[7 7 y/ 7......- 7...,..... ~ ~ ~ ~
o
80
160
240
PLATE VOLTS
320
'l,.!/
~
~
400
480
9ZCU"4771T
309
RCA Receiving Tube Manual
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ............ " ....•....•..•...........................•..
GRID VOLTAGE, Positive-bias value. ~ •.......••..•..•...•..........••..••..
PLATE DISSIPATION ..........•..•........................................
CATHODE CURRENT .........................•.....................•.....•
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..... " ............•.............
Heater positive with respect to cathode ........•........................
300 max
o max
2.5 max
20 max
volts
volts
watts
rna
90 max
90 max
volts
volts
Characteristic~:
Plate Voltage ..••....•.................. , .. , . . . . . . . . . . .. . . . . .
90
Grid Voltage ............... " . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0
Amplification Factor... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 6700
Transconductance ............................................ 3000
Grid Volta~e (Approx.) for plate current of 10 "a.. . . . . . . . . . . . . . . . -7
Plate Current................................................
10
250
-8
20
7700
2600
-18
9
volts
volts
ohms
"mhos
volts
rna
Maximum Circuit Value:
Grid-Circuit Relistance .•.••.•.•...•................•....................
1.0 max megohm
MEDIUM-MU TWIN TRIODE
6J6
Miniature types used as combined
rf power amplifier and oscillator or as
twin af amplifier. With push-pull arRelated types:
5J6,19J6
rangement of the grids and the plates
in parallel, can also be used as a mixer
PT2 I
at frequencies as high as 600 megacycles per second. Outline 7B, OUTLINES SECTION. Tubes require miniature seven-contact socket and may be mounted in any
position. Type 6J6 is a DISCONTINUED type listed for reference only.
6J6A
HEATER VOLTAGE (AC/DC) ............................................•... 6.3
HEATER CURRENT ...................................................... . 0.45
HEATER WARM-UP TIME (Average) for 6J6-A .............................. .
11
Without
With
Externa_
External
DIRECT INTERELECTRODE CAPACITANCES (Each Unit, Approx.):
Shie~d
Shield
Grid to Plate ...................................... .
1.6
1.6
Grid to Cathode and Heater ......................... .
2.2
2.6
Plate to Cathode and Heater (Unit No.1) ............. .
0.4
1.6
Plate to Cathode and Heater (Unit No.2) ............. .
1
0.4
volts
ampere
seconds
pf
pf
pf
pf
CLASS A, AMPLIFIER (Each Unit):
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Positive-bias value ................................... .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
300 max
o max
1.5 max
volts
volts
watts
100 max
100 max
volts
volts
100
volts
ohms
Characteristics:
Plate Voltage .........•......•...............•.•..••.............•..
Cathode-Bias Resistor ............................................... .
Amplification Factor ..........•.•.•..................................
Plate Resiotance (Approx.) .......................................... .
Transconductance ....•........•.....................................
Plate Current ...................................................... .
50t
38
7100
5300
8.5
ohms
pmhos
rna
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ....................................... .
1 Value is for both units operating at the opecified conditiono.
Not recommended
O. 5 max megobm
RF POWER AMPLIFIER AND OSCILLATOR-Class C Telegraphy
Key-down conditions per tube without modulation
Maximum Ratings, (Design-Center Values, Each Unit):
PLATE VOLTAGE.. . . . . . .. . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID VOLTAGE:
Negative-bias value.... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Positive-bias value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
310
300 max
volts
-40 max
0 max
volts
volts
------------------------- Technical Data -----------------------PLATE CURRENT ................................................... .
GRID CURRENT ..................................................... .
PLATE INPUT ......................... ~ ............................ .
PLATE DiSSiPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .•..........................
Heater positive with respect to cathode ........................... .
15 maz
8 mao:
..5 mao:
1.5 mao:
rna
rna
watts
watts
100 mao:
100 mao:
volts
volts
Typical Push-Pull Operation (Both Units):
Plate Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
150
Grid Voltage·. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
-10
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
Grid Current (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . .
16
Driving Power (Approx.). .. . . . . .. . . . . . . . . .. .. .. . . . . .. . . . . • . . . . . . . . . . .
0.35
Power Output (Approx.) . . . . . . . . . • .. . . .. .. . . .. . . . . . . . . . . . . . . . . .. . . . . .
3.5
• Obtained by grid resistor (625 ohms), cathode-bias resistor (220 ohms), or fixed supply.
SHARP·CUTOFF PENTODE
volts
volts
rna
rna
watt
watts
6J7
Metal type 6J7 and glass octal
6J7G
types 6J7-G and 6J7-GT are used as
biased detectors or high· gain audio
amplifiers in radio receivers. Outlines
R.la.... type:
BC:6J7-GT
3, 23, and 15A, respectively, OUT12J7GT
LINES SECTION. Type 6J7-GT is used principally for renewal purposes. Type
6J7-G is a DISCONTINUED type listed for reference only. All types require octal
socket and maybe mounted in any position: Heater volts (ac/dc), 6.3; amperes, 0.3.
6J7GT
CLASS Al AMPLIFIER
Maximum Ratings, (D ••ign-Center Val" •• ):.
PLATE VOLTAGE .................. " •...•..•........•..•••...........
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. ..
GRID-No.2 SUPPLY VOLTAGE .................. '" ....................•
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ........•.•..•••
PLATE DISSIPATION .............•....................................
GRID-No.2 INPUT:
For grid-No.2 voltages up·to 150 volts ............................. .
PE::il:l~!?JA~~I:~ev~~~'!~'i:: 150 and 300 volts .................... .
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ..............•............••
300 mao:
volt.
See curve page 70
300 mao:
volts
o max
volts
0.75 mao:
watt
0.10 mao:
watt
See curve page 70
90 mao:
90 mao:
volts
volt.
Characteristics;
volta
Plate Voltage. ..........................................
100
250
Grid No.3 ....................................•.....•... Connected to cathode at socket
volts
Grid-No.2 Voltage ............••....••............... '" .
100
100
volta
Grid-No.1 Voltage.......................................
-3
-3
megohm
Plate Resistance .(Approx.) . .. .. . .. . .. . . .. .. . . .. .. . . • . .. . .
1
•
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . •
1185
1225
IImhos
volts
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a. .. . . .
-7
-7
rna
Plate Current. .. . . . .. • . . . .. . . . . .. .. . . .. .. .. .. .. . .. . . .. . .
2
2
Grid-No.2 Current.................................... ..•
0.5
0.6
ma
Maximum Circuit Value:
Grid-No.1-Circuit Resistance ......................................... .
CLASS Al AMPLIFIER (Triade Connection)·
Maximum Ratings, (Design-C.nl.r Valu ••):
PLATE VOLTAGE .•............................................... " ..
GRID-No.1 VOLTAGE, Positive-bias value .............................. .
PLATE DISSIPATION (TOTAl.) ......................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode', .......................... .
Heater positive with respect to cathode '" ......................... .
Cha ra cteristics:
Plate Voltage ......................................... ..
Grid-No.1 Voltage .••..............•.••...•...•..• , ..... .
Amplification Factor .................................... .
Plate Resistance (Approx.) ..............•....•..........•
Transconductance ...................................... .
,Plate Current .......................................... .
180
-6.S
20
11000
1800
6.3
Maximum Circuit Value:
Grid-No;l-Circuit Resistance ....................................... ..
• Greater than 1.0 megohm.
• Grida No.2 and·N 0.3 connected to plate •.
1.0 maz
megohm
250 maz
1. 75 mao:
o maz
volts
volts
watt.
90maz
90maz
volts
volts
260
-8
20
10600
1900
6.6
1.0maz
volts
volts
ohms
IImhos
rna
megohm
311
RCA Receiving Tltbe· Manltal
TRIODE-HEPTODE CONVERTER
Glass octal type used as a combined triode
oscillator and heptode mixer in radio receivers.
Outline 23, OUTLINES SECTION. Tube requires octal socket. Heater volts (ac/dc), 6.3;
amperes, 0.3. Typical operation-Heptode unit:
plate volts, 250 (300 max); grids-N 0.2-and-No.4
volts. 100 max; grid-No.1 volts, -3; plate resistance, 1.5 megohms; conversion transconducNC
G5HP
tance, 290 "mhos; plate rna., 1.4; grids-No.2-and-No.4 rna., 2.8. Triode unit: plate volts, 250 max
(applied through 20000-ohm dropping resistor); grid resistor, 50000 ohms; plate rna., 5.0. This is a
DISCONTINUED type listed for reference only.
6J8G
H
BEAM POWER TUBE
N ovar type used as high-efficiency
horizontal-deflection-amplifier tube in
television receivers. Outline 18A, OUTLINES SECTION. Tube requires novar nine-contact socket and may be
mounted in any position.
6JB6
Related types:
12JB6, 17JB6
K
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................ .
6.3
1.2
volts
amperes
0.2
15
6
pC
pC
pC
CLASS At AMPLIFIER
Triode
Characteristics:
Pentode
Connection Connection
Plate Voltage .......................................... .
Grid No.3 (Suppressor Grid) ............................. .
Grid-No.2 (Screen-Grid) Voltage ......................... .
Grid-No.1 (Control-Grid) Voltage ........................ .
Mu-Factor, Grid No.2 to Grid No.!. .. , .................. .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-N 0.1 Voltage for plate current of 1 rna ............... .
150
60
150
volts
Connected to cathode at socket
150
150
150
volt.
-22.5
0 -22.5
volts
4.4
- 15000
ohms
- 7100
"mho.
390 0
70
rna
32 0 2.1
rna
-42
volts
HORIZONTAL-DEFLECTION AMPLIFIER
For 'Operation in a 525-line, 3D-frame system
Maximum Ratings, (Design-Maximum Values):
DC PLATE SUPPLY VOLTAGE .................................. .
770 max
AVERAGE CHARACTERISTICS
TYPE 6JB6
Ef=6.3 VOLTS
45o GRID No.3 CONNECTED TO CATHODE AT SOCKET.
GRID-No.2 VOLTS=150
~RIO-N~I VOLTS ECI~
400
/'
~35 0
I
Ix
!:!
l!l
~ 300
:0
3250
-5
I.
.
w
~200
IllIc2
~
V
..J
:;;
75",
-20.-
r
1/
o
'"
IOO~
-15
I
o
312
10
0
100
..'"
125~
='
:0
\so
'-
-
Ec =0
-.
-
!3
50 ~
Of
b. o
-25
'-
0
50
100
150
200
PLATE VOLTS
250
300
"
92CM-1I835T
volts
========= Technical Data ========-PEAK POSITIVE-PULSE PLATE VOLTAGE# .............................. .
PEAK NEGATIVE-PULSE PLATE VOLTAGE .............................. .
DC GRID-No.3 VOLTAGEt ........................................... .
DC GRID-No.2 VOLTAGE ............................................ .
DC GRID-No.1 VOLTAGE ............................................ .
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE .......................... .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATION-................................................ .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
6500
-1500
70
220
-55
-330
550
175
17.5
3.5
max
max
max
max
max
max
max
max
max
max
volts
volts
volts
volts
volt.
volts
rna
rna
watts
watt.
200 max
200""ax
240 max
volts
volts
·C
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For grid-resistor-bias operation ................................... .
1 max megohm
o This value can be measured by a method involving a recurrent waveform such that the maximum
rating. of the tube will not be exceeded.
# The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
t For horizontal-deflection service, a positive voltage may be applied to grid No.3 to minimize "snivets"
interference in both vhf and uhf television receivers. A typical value for this purpose is SO volts.
- An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
• The dc component must not exceed 100 volts.
H
SHARP-CUTOFF PENTODE
Miniature type with frame grid
used in if-amplifier stages of television
receivers utilizing intermediate freRelated types:
3JC6,4JC6
quences in the order of 40 megacycles.
K
GS,IS
Tube features high transconductance
at low B-supply voltages. Outline 8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket and may be mounted in any position.
6JC6
HEATER VOLTAGE (AC Inc) . ......................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ..
6.3
0.3
0.019 max
8.2
3
volts
ampere
pf
pf
pf
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value ................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .............. : ............ .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ............................ .
For grid-No.2 voltages between 165 and 330 volts .................. .
PLATE DiSSiPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater nega ti ve wi th respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
380 max
volts
o max
volts
330 max
volts
See curve page 70
o 100X
volts
0.6 max
watt
See curve page 70
2.5 max
watts
200 max
200·max
volts
volts
Characteristics:
Plate Supply Voltage. . .. . . . . . .. .. . . . .. . . .. . . . . . .. . . . . . . . . . . . . .. . .. . .
125
volts
Grid No.3 .................................................... Connected to cathode at socket
Grid-No.2 Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
volts
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
56
ohms
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ... . . .
0.18
megohm
Transconductance .................................................. "
',15000
I'mhos
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13
rna
Grid-No.2 Current .............................................. ·...
3.2
rna
Grid-No.1 Voltage (Approx.) for plate current of 100 I'a... . . . . . . . . . . . . . . .
-3
volts
313
RCA Receiving Tube Manual
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
• The dc component must not exceed 100 volts.
0.25 max megohm
1 max megohm
AVERAGE CHARACTERISTICS
TYPE 6JC6
E f =6.3 VOLTS
GRIO No.3 CONNECTED TO CATHODE AT SOCKET.
.. 3I! GRIO-No.2 VOLTS =125
...
....
JIO-No.l
0:
~3
........
1b
:::;
./
"\
~
.,2
u
VOLTS1EC'-O
\/
A
~
N
d 2
z
I
~
'"I
-0.5
!!5
-I
tb
"
I
~
--
ECI-O
-1.5
/
o
2
20
40
60
80
100
120
140
160
180
200
,,40
220
PLATE VOLTS
,,60
92CM-1I948T
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
G2
Miniature type used as combined
vhf oscillator and. mixer tube in'teleT
vision receivers employing series-connected heater strings. Outline 8B,OUTLINES SECTION. Tube requires
IS
miniature nine-contact socket and may. be mounted in any position. Heater volts
(ac/dc), 6.3; amperes, 0.45; warm-up time (average), 11 seconds;
6JC8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PI,ATE VOLTAGE ..................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive"bias value .... .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Triode
Unit
275 max
o max
1. 7 rna",
GRID-No.2 INPUT:
For grid-No.2 voltages up to 137.5 volts ............... .
For grid-No.2 voltages between 137.5 and 275 volts ..... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .............. .
Heater positi¥e with respect to cathode ............... .
Penrode
Unit
275 max
275 max
volts
volts
See curve page 70
o max
volts
2.3 max
watts
0.45 max
watt
See curve page 70
200 rna"
200· max
volts
volts
Characteristics:
Plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-N 0.1 Voltage ...................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance .. ' .................................... .
Plate Current ........................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a ...... .
125
-1
40
6000
6500
12
-7
100
70
o
125 volts
125 volts
-1 volt
- 300000 ohms
5700 5500l'mhos
9
rna
2.2
rna
6.5 volts'
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
• The dc component must not exceed 100 volts.
314
O. 1 max
0.5 rna"
megohm
megohm
========= Technical Data =========
H
SHARP-CUTOFF PENTODE
p
Miniature type used as if-amplifier
tube in television receivers utilizing an
intermediate frequency in the order of
40 megacycles. Outline8B, OUTLINES
K
G3.IS
SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position.
6JD6
Related types:
3JD6, 4JD6
volts
6.3
0.3
HEATER VOLTAGE (AC IDC) . ..............•............................
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ... '" ....................................... .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3,
and Internal Shield ........................................... .
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ..
ampere
0.019 max
pf
pf
pf
8.2
3
CLASS At AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
330 max
volts
o max
volts
330 max
volts
See curve page 70
o max
volts
PLATE VOLTAGE .................................................... .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE, Positive value ................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ............... ,.
GRID-No.2 INPUT:
For grid-N 0.2 voltages up to 165 volts ............................ .
For grid-No.2 voltages between 165 and 330 volts .................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
0.6 max
watts
See curve page 70
2.5 max
watts
200 max
200-max
volts
volts
Characteristics:
Plate Supply Voltage ............................................... .
Grid-No.3 Voltage .................................................. .
Grid-No.2 Supply Voltage. . .
. .................. .
Grid-N 0.1 Supply Voltage ........................................... .
Cathode-Bias Resistor .............................................. .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Plate Current ...................................................... .
Grid-No.2 Current ................................................. .
Grid-No.1 Voltage (Approx.) for transconductance of 600 pmhos ......... .
125
volts
volta
volts
volts
ohms
ohms
pmhos
rna
rna
volts
o
o
125
56
160000
14000
15
4
-4.5
Maximum Circuit Values:'
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
- The dc component must not exceed 100 volts.
o.25
max megohm
1 max megohm
AVERAGE CHARACTERISTICS
TYPE 6JD6
GRID No.3 CONNECTED TO SOCKET.
GRID-No.2 VOLTS -125
E1 "'6.3 VOLTS
5
0
1\
0
tb
\
(
.. It-
5
\~
0
\
GRID-No.1 VOLTS Eel"-O'S
/
/
5
-I
I \. -
rc,-;o
--
f---
_.
-1.5
~
ECI=-2
Ib
-2.5
-3
0
20
40
60
eo
100
140
120
160
PLATE VOLTS
leo
200
20
2.v
<60
92CM-1I9SIT
315
RCA Receiving Tube Manual
H
BEAM POWER TUBE
N ovar type used as horizontal-deflection-amplifier tube in color television receivers. Outline 18B, OUTLINES SECTION. Tube requires novar nine-contact socket and may be
mounted in any position.
6JE6
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................ .
6.3
2.5
volts
amperes
0.44
21
11
pf
pf
pf
CLASS AI AMPLIFIER
Triode
Penrode
Connection Connection
125
70
175
volts
Connected to cathode at socket
volts
125
125
125
-25
0
-25
volts
3.3
5500
ohms
- 10500
/'rnhos
580t 115
rna
rna
40t
5
-55
volts
Characteristics:
Plate Voltage .......................................... .
Grid No.3 (Suppressor Grid) ............................. .
Grid-No.2 (Screen-Grid) Voltage ......................... .
Grid-No.1 (Control-Grid) Voltage ........................ .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 1 rna ..... .
HORIZONTAL· DEFLECTION AMPLIFIER
For operation in a 525-line, SO-frame 8,,8tem
Maximum Ratings, (De8ign-Maximum Values):
DC PLATE SUPPLY VOLTAGE ......................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE-............................... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ............................... .
DC GRID-No.3 VOLTAGE- ........................................... .
DC GRID-No.2 VOLTAGE ............................................ .
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE .......................... .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATIONo ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
990
7000
-1100
75
190
-250
1100
315
3.2
24
max
max
max
max
max
max
max
max
max
max
volts
volts
volts
volts
volts
volts
rna
rna
watt.
watts
200 max
200*max
240 max
volts
volts
·C
AVERAGE CHARACTERISTICS
80
TYPE SJE6
E,%6.' VOLTS
GRID No.3 CONNECTED TO
70<
CATHODE AT SOCKET.
GRID-No.2 VOlTS-125 ~ V
~
600
I
000
{
400
300
V
V
7
~
"C
o
~
~
~
l...- ..L--
~ ..----
,
316
V
--
~
,00
~
-
1--V
~i-~
t..:.!.
-1:!!..
Ib
-25
-30
.c
200
'-
EC,'O
300
400
PLATE VOLTS
-35
500
'2CM-lleaOT
Technical Data ------------------Maximum Circuit Values:
Grid-N o.l-Circuit Resistance:
For grid-resistor-bias operation o. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.47 max megohm
For plate-pulsed operation (horizontal-deflection circuits only) . . . . . . . .
10 m(U: megohms
t This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
• The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds .
• In this service, a positi ve voltage may be applied to grid No.3 to minimize "snivets" interference; a
typical value for this voltage is SO volts.
o An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
The dc component must not exceed 100 volts.
*
AVERAGE CHARACTERISTICS
800
~
~
5
700
::i
5600
N
tj 500
.;
Z
I
0400
it:
'"
0:
°300
t!
~ 200
rt
100
(
/~--
(V
V
V
I
N
If
----
~VO\.7S
V-
~~
~s. • 75
---
(
;r
-n
I.
\~
TYPE 6JE6
Ef·6.3 VOLTS
GRID No.3 CONNECTED TO
CATHODE AT SOCKET.
GRID-No.1 VOLTS,O
-~~-
!--
1fA"- --
~
~5
IC2
--1--- __ JE.£2.:!~
100
200
300
400
500
PLATE VOLTS
92CM-lt881T
"~., SEMI:~~:-~~T:Fi:~:::E
controlled picture if-amplifier stages
of television receivers. Outline 7B,
I
IS
OUTLINES SECTION. Tube reGI
quires miniature seven-contact socket
and may be mounted in any position. For curves of average plate characteristics,
refer to type 6BZ6.
K 2
6JH6
7 G3
HEATER VOLTAGE (AC/DC) ..
HEATER CURRENT ....... .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate .................... .
Grid No.1 to Cathode, Heater, Grid No.2, Grid .. "
No.3, and Internal Shield ................. .
Plate to Cathode, Heater, Grid No.2, Grid
No.3, and Internal Shield ................... .
6.S
0.3
Without
With
External
External
Shield
Shield o
0.025 max 0.015 max
volts
ampere
pf
7
7
pf
2
3
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE. . . . . . . . . .
. ............... .
GRID-No.S (SUPPRESSOR-GRID) VOLTAGE, Positive value ... .
GRID-No.2 (SCREEN-GRID) SUPPLY Vm. . TAGE . . . . . . . . '" . . . . .
GRID-No.2 VOLTAGE...
. ........... .
GRID-Nr.l (CONTROL-GRID) VOLTAGE, Positive-bias value.
GRID-N 0.2 INPUT
.
For grid-No.2 voltages up to 150 volts.
For grid-No.2 voltages between 150 and SOO volts.
300 max
volts
o max
volts
300 max
volts
See curve page 70
o max
volts
0.55 max
watt
See curve page 70
317
RCA Receiving Tube Manual
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...................... .
Heater positive with respect to cathode ....................... .
200 max
200 "max
volts
volts
Characteristics:
Plate Supply Voltage... . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
125
volt
Grid No.3............................................. ....
Connected to cathode at socket
Grid-No. 2 Supply Voltage.......................................
125
volts
Cathode-Bias Resistor. . . .. .. . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . •
56
ohms
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.26
megohm
Transconductance... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . .
8000
I'mhos
Transconductance Range for grid-No.1 voltage of -4.5
volts and cathode-bias resistor of 56 ohms... . . . . . . . . . . . . . ... . . . .
400-900
I'mhos
Grid-No.1 Voltage (Approx.) for transconductance of
50 I'mhos and no cathode-bias resistor. . . . . . . . . . . . . . . . . . . . . . . . .
-19
volts
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
rna
Grid-No.2 Current .................. , . .. .. .. .. .. .. .. . .. .. .. .. . . .
3.6
rna
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias. operation .................................... .
For cathode-bias operation .................................. .
0.25 max
1 max
megohm
megohm
°With external shield connected to cathode.
-The dc component must not exceed 100 volts.
BEAM-DEFLECTION TUBE
Miniature type used in color-demodulator and burst-gate circuits in
color television receivers. This type
has two plates and two deflecting elecDJz
PI
trodes; the control grid varies beam deflection.Outline 8D,OUTLINES SECTION.
Tube requires miniature nine-contact socket and may be mounted in any position.
Pin 5 should be connected to cathode at socket. The 6JH8 should be so located in
the equipment that it is not subjected to stray magnetic fields. Heater volts
(acjdc), 6.3; amperes, 0.3.
6J H8
COLOR TV DEMODULATOR
Maximum Ratings, (Design Maximum Values):
PLATE VOLTAGE (EACH PLATE) ............................. .
PEAK DEFLECTING-ELECTRODE VOLTAGE (EACH ELECTRODE):
Negative value ..................................... .
Positive value ............................................ .
GRID-No.3 (ACCELERATING-GRID) VOLTAGE .............. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................. .
CATHODE CURRENT .................................................. .
PLATE DISSIPATION (EACH PLATE) ...................................... .
GRID-No.3 INPUT .................................................. .
330 max
volts
-165 max
165 max
330 max
o max
33 max
3 max
1 max
volts
volt.
volts
volts
rna
watts
watt
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation .................................. .
0.1 max megohm
0.25 max megohm
CLASS Al AMPLIFIER
W itk bolh plales conneeled logelher and with bolh
deftecling eleelrodes connected 10 calhode at Bocket
Characteristics:
Plate-No.1 Supply Voltage ........................................... .
Plate-No.2 Supply Voltage ........................................... .
. ........... .
Grid-No.3 Voltage...... .............................
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . .
. .............. .
Transconductance ................................................... .
Total Plate Curren t ................................................. .
Grid-No.3 Current ................................................... .
Grid-No.1 Voltage (Approx.) for total plate current of 10 I'a ......... .
318
250
250
250
220
4400
14
1.5
-13
volts
volts
volts
ohms
.umhos
rna
rna
volts
--======== Technical Data --========
H
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type with frame-grid
pentode unit used in television receivers. The triode unit is used as a
voltage-amplifier or sync-separator
KT
tube, and the pentode unit is used as a
video-amplifier tube. Outline llAi OUTLINES SECTION, except base is smallbutton miniature 9-pin. Tube requires miniature nine-contact socket and may be
mounted in any position. Heater volts (ac/ dc), 6.3; amperes, 0.725.
6J T8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE......................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ................ .
GRID-No.2 VOLTAGE ..................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ..... .
PLATE DISSIPATION...................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ................. .
For grid-No.2 voltages between 165 and 330 volts ....... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ................ .
Triode
Unit
330 max
o max
1 max
Pentade
Unit
330 max
vol ts
330 max
volts
See curve page 70
o .-max
volts
4 max
watts
1. 1 max
watts
See curVe page 70
200 max
200-max
200 max
200-max
volts
volts
Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Grid-No.1 Voltage ...................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance . ..................................... .
Plate Current .......................................... .
Grid-N 0.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 100 I'a ..... .
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a ...... .
250
-2
35
100
o
200
100
82
100
37000
2700
1.5
50·
17·
-5.3
volts
volts
volts
ohms
50000 ohms
20000l'mhos
17
ma
3.5
ma
-5 volts
volts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
o 5 max
For fixed-bias operation .............................. .
0.25 max megohm
1 max
1 max megohm
For cathode-bias operation ........................... .
-The de component must not exceed 100 volts.
-This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
H
QUADRUPLE DIODE
Miniature type used in phase-detector and noise-immune, color-killer
circuits of color television receivers;
also used in bridge-matrixing circuits
P04
KPI
in FM stereo multiplex equipment.
Outline 8D, OUTLINES SECTION. Units 1 and 2 are shielded from units 3 and 4
to minimize coupling between the series-connected pairs of diodes. Tube requires
miniature nine-contact socket and may be mounted in any position.
6J U8
HEATER VOLTAGE (AC/nc) ............................................ .
HEATER CURRENT ................................................... .
DIRECT INTERELECTRODE CAPACITANCES (APPROX.):
Plate of Unit No.1 and Cathode of Unit No.2 to Cathode of Unit No.1.
Plate of Unit No.1 and Cathode of Unit No.2 to Plate of Unit No.2 ....
Plate of Unit No.2 to Heater and Internal Shield ................•....
6.3
0.6
ampere
volts
1.8
2.2
0.62
pC
pf
pf
319
RCA Receiving Tube Manual -----------Plate of Unit No.3 and Cathode of Unit No.4 to Cathode of Unit No.3.
Plate of Unit No.3 and Cathode of Unit No.4 to Plate of Unit No.4 ... .
Plate of Unit No.4 to Heater and Internal Shield .................... .
Cathode of Unit No.1 to Heater and Internal Shield ................. .
Cathode of Unit No.3 to Heater and Internal Shield ................. .
1.9
2.2
.0.94
1.8
1.9
pf
pf
pf
pf
pf
Maximum Ratings, (D.sign-Mao:imu.m Valu..s, Eaeh Uni!):
PEAK INVERSE PLATE VOLTAGE .......•.............•...•....•........•.
PEAK PLATE CURRENT . . . . • . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . , .•.....
DC OUTPUT CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
3.0.0 mao:
54 mao:
9 mao:
volts
roa
roa
Heater negative with respect to cathode ... '......................... .
Heater positive with respect to cathode ............................ .
3.0.0 mao:
3.0.0 mao:
volts
volts
Characteristics, Instantaneous Value, (Each Unit):
Plate Current for plate voltage of 1.0 volts .............................. .
6.0
roa
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in television reR.I.ted type:
ceivers, particularly those having lowIJVI
voltage liB" supplies and employing
"
series-connected heater strings. The
triode unit is used in sound-if, keyed-age, sync-separator, sync-amplifier, and
noise-suppression circuits. The pentode unit is especially useful as a video amplifier
tube .. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact
socket and may be mounted in any position.
6JV8
HEATER VOLTAGE (AC IDC) . ••••........•...•..•...••..•.........•.•.•.•
HEATER CURRENT .......•............••••••.......••........•••.••...
HEATER WARM-UP TIME (AVERAGE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECT INTERELECTRODE CAPACITANCES (APPROX.):
Triode Unit:
Grid to Plate.................................................... .
Grid to Cathode and Heater ...................................... .
Plate to Cathode and Heater...................................... .
Pentode Unit:
Grid No.1 to Plate ........... , ................................... .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield... .
Pentode Grid No.1 to Triode Pbt.te .................................... .
Pentode Plate to Triode Plate ......................................... .
6.3
.0.6
11
volt.
ampere
seconds
2.2
3
2
pf
pC
pf
.0 . .08 mar
8
3.2
.0 . .012 mao:
.0.24 mao:
AVERAGE PLATE CHARACTERISTICS
TRIODE UNIT
TYPE 6JV8
E, -6.5 VOLTS
0
.0
I~
.pJ~
I?;;'
0
V
./
~
V
o
320
I-'"'
V
-V
V
V
./
V
-
V
100
./
l/
.... V
1./
V
V
- t.- V
V
ISO
,'I.
./
i:7
zoo
PLATE WLTS
V-'
V
.'!I
V~
~
250
~CM-1I960T
pf
pf
pf
pf
pf
Technical Data ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
CLASS Al AMPLIFIER
Triode
Unit
330 max
Maximum Ratings, (Design-Maximum Value.):
PLATE VOLTAGE ......................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ....................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Positive-bias value .................................•.
Negative-bias value ..•...............................
PLATE DISSIPATION ...................................... .
GRID-No.2 INPUT ....................................... .
PEAK HEATER-CATHODE VOLTAGE':
Heater negative witb respect to cathode ............... .
Heater positive with respect to cathode .......•.........
Characteristics:
Plate Voltage ............................. .
Grid-No.2 Voltage ........................ .
Grid-No.1 Voltage ........................ .
Amplification Factor ...................... .
Plate Resistance (Approx.) ................. .
Transconductance ......................... .
Plate Current .............•...............
Grid-No.2 Current ........................ .
Grid-No.1 Voltage (Approx.) lor plate
current 01 20 "a ...................... .
Triode Unit
200
-2
70
0.0175
4000
4
Penrod.
Unit
330 max
330 max
volts
volts
-60 max
1.1 max
-60 max
4 max
1.7 max
o max
volts
volts
watts
watts
200 max
200 ....ax
200 max
volts
volts
o max
~OO""ax
Penrode Unit
126
200
60
200
125
200
-2.9
-1
0
volts
volts
volts
0.1
11500
22
144
0.15
10700
22
4
megohm
"mhos
ma
ma
-5.5
-9
volts
-
51-
-5
Maximum Circuit Values:
Grid-No.1-Current Resistance:
0.25 ma", megohm
0.6 me'"
For fixed-bias operation .............................. .
1 max megohm
1 max
For cathode-bia" operation ........................... .
-Tbe dc component must not exceed 100 volt••
"This value can be measured by a method involving a recurrent waveform such that the maximum
ratings 01 the tube will not be exceeded.
AVERAGE CHARACTERISTICS
PENTODE UNIT
TYPE 6JV8
E,-6.3 VOLTS
GRID-No.2 VOLTS-ZOO
60
II
4
\
/
/'
-I
-2
~ ...-
-3
........ ~
100
NeG
~
__ _
I!
7
ae
I
C -0
-
0
It
-4
~
10.//
CO<'
p 3
GRIO-NoJ VOLTS '£<0,-0
Ib
8
K
H
150
-5
-6
200
2t5O
PLATE VOLTS
t2CM-II961T
HIGH.MU TRIODE
Glass octal type used as voltage amplifier
in radio equipment. Outline 15A. OUTLINES
SECTION. Tube requires octal socket. Heater
volts (ac/dc), 6.3; amperes, 0.3. Cbaracteristics
as dass Al amplifier: plate volts, 250 max; grid
volts, -3; amplification factor, 70; plate resistance, 50000 ohms; transconductance, 1400
umhos; plate ma., 1.1. This is a DISCONTINUED type listed for reference only.
6K5GT
321
RCA Receiving Tube Manual
~2
POWER PENTODE
4 5 C;I
Glass octal type used in output
P 3
stage of radio receivers and, triodeH 2
1 H
connected, as a vertical deflection amplifier in television receivers. It is capa1
8
ble of delivering moderate power outNC
~3
put with relatively small input voltage. Tube may be used singly or in push-pull.
This type may be supplied with pin No.1 omitted. Tube requires octal socket and
may be mounted in any position. Outline 14C, OUTLINES SECTION. It is especially important that this tube, like other power-handling tubes, be adequately
ventilated.
6K6GT
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT ... , ..................................•............
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ...................................•..•........
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ............ .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ......••.........
6.3
0.4
volts
ampere
0.5
5.5
6.0
pf
pf
pf
CLASS Al AMPLIFIER
Maximum Ratings. (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ...... " ............... " .......... .
PLATE DISSIPATION ..•............................•..................
GRID-No.2 INPUT ...........................................••......
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......•......................
Heater positive with respect to cathode ...........................•.
*The dc component must not exceed 100 volts.
315 max
285 max
8.5 max
2.8 max
volts
volts
watts
watts
200 max
200* max
volts
volts
Typical Operation:
100
Plate Voltage .............................. .
Grid-No.2 Voltage ......•....................
100
Grid-No.1 (Control-Grid) Voltage ............ .
-7
Peak AF Grid-No.1 Voltage ...•....... " .... .
7
Zero-Signal Plate Current ......•.............
9
9.5
Maximum-Signal Plate Current. " ....•....•..
Zero-Signal Grid-No.2 Current ............... .
1.6
Maximum-8ignal Grid-No.2 Current ....•......
3
Plate Resistance (Approx.) ..........•........ 104000
1500
Transconductance ...••......................
12000
Load Resistance ........•....................
11
Total Harmonic Distortion ..................•
0.35
Maximum-Signal Power Output ..•............
Typical Push·Puli Operation (Values are for two tubes):
Plate Supply Voltage .................................. ..
Grid-No.2 Supply Voltage ............................... .
Grid-No.1 Voltage ...•...........•...............•......
Cathode-Bias Resistor ....................••.............
Peak AF Grid-No.l-to-Grid-No.l Voltage ..•...............
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current ..............•............
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ........•......••...•..
Effective Load Resistance (Plate-to-plate) ....••...•....••.•
Total Harmonic Distortion .............................. .
Maximum-Signal Power Output .•...........••............
250
250
-18
18
32
33
5.5
10
90000
2300
7600
11
3.4
Fixed
Bia.
285
285
-25.5
315
250
-21
21
25.5
28
4.0
9
110000
2100
9000
15
4.5
Cathode
Bia.
285
285
51
55
72
9
17
12000
6
10.5
400
51
55
61
9
13
12000
4
9.8
volts
volts
volts
volts
rna
rna
rna
rna
ohm.
/'mhos
ohms
per cent
watts
volts
volts
volts
ohms
volt.
rna
rna
rna
rna
ohm.
per cent
watts
Maximum Circuit Values:
Grid-No.I-Circuit Resistance:
For fixed-bias operation ..•............•.........•.................
For cathode-bias operation ... .................................... .
Characteristics (Triode Connection)*:
Plate Voltage ..•.•.................................................
Grid-No.1 Voltage ................................................. ..
Plate Current ..................................................... ..
Transconductance . ................................................. .
Amplification Factor .......•.............•...........................
Plate Resistance (Approx.) .......................................... .
Grid-No.1 Voltage (Approx.) for plate current of 0.5 rna ................. .
Grid-No.2 connected to plate.
*
0.1 max
0.5 max
250
-18
37.5
2700
6.8
2500
-48
megohm
megohm
volts
volts
rna
/'mhos
ohms
volts
VERTICAL DEFLECTION AMPLIFIER (Triode Conneclion)*
Maximum Ratings:
For operation in a 5Z5-line, SO-frame 'I/stem
DC PLATE VOLTAGE ............ " ................................. , •
PEAK POSITIVE-PULSE PLATE VOLTA GEt (Absolute ma%imum) . ...••.......
322
315 max
12000 max
volts
volts
========= Technical Data =========
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ..••...••...••••••.•.•......
PEAK CATHODE CURRENT . . . . . . . . . . . . . . • . . . . . . . . . . . • . . • . . • . . • . • . . . • . . •
AVERAGE CATHODE CURRENT . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . • • . . . . . .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
-250
75
25
7
max
max
max
max
volt.
rna
rna
watts
volts
volts
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
Maximum Circuit Value:
Grid-No.1-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max megohms
Grid No.2 connected to plate.
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a 525line, 30~frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
o Under no circumstances should this absolute value be exceeded .
• The dc component must not exceed 100 volts.
*
6K7
REMOTE-CUTOFF PENTODE
Metal type 6K7 and glass octal types 6K7G and 6K7-GT used in rf and if stages of radio
recei vers, particularly in those employing ave.
Outlines 3, 23, and 15A, respectively, OUTLINES SECTION. These tubes require octal
R.latlve type:
socket and may be mounted in any position.
12K7GT
For electrode voltage supplies and application,
BC6K1-C;T
refer to type 6SK7. Heater volts (ac/dc), 6.3;
amperes, 0.3. Typical operation as class Al amplifier: plate volts 250 (300 max); grid No.3 connected to
cathode at socket; grid-No.2 supply volts, 300 max; grid-No.2 volts, 125; grid-No.1 volts, -3; plate
resistance, 0.6 megohm; transconductance, 1650 I'mhos; plate rna., 10.5; grid-No.2 rna., 2.6; plate dissipation, 2.75 max watts; grid-No.2 input, 0.35 max watts. Types 6K7 and 6K7-GT are used principally
for renewal purposes. Type 6K7-G is a DISCONTINUED type listed for reference only.
6K7G
6K7GT
TRIODE-HEXODE CONVERTER
6K8
Metal type 6KS and glass octal types
6KS-G and 6KS-GT used as combined triode
oscillator and hexode mixer tubes in radio receivers. Type 6KS, Outline 4; type 6KS-G, Outline 23, OUTLINES SECTION. Tubes require
octal socket. Heater volts (ac/dc), 6.3; amperes.
0.3. Typical operation in converter service:
Related type:
Be 6K8-GT
hex ode plate volts, 250 (300 max); hexode grids12K.
No.2-and-No.4 volts, 100 050 max); hexode grid-No.3 volts, -3 (0 max); triode plate volts, 100 (125
max); triode grid resistor, 50000 ohms; hexode plate resistance (approx.), 0.6 megohm; conversion transconductance, 350 I'mhos; hexode plate rna., 3.8; triode grid and hexode grid-N 0.1 rna., 0.15; total cathode
rna., 12.5 (16 max). Types 6KS-G and 6KB-GT are DISCONTINUED types listed for reference only.
Type 6KS is used principally for renewal purposes.
6K8G
6K8GT
KTZ
GTZ
7
THREE-UNIT TRIODE
Duodecar type containing one
medium-mu and two high-mu triode
units used as combined agc, sync, and
noise-inverter tube in television reH
H
ceivers employing series-connected
heater strings. Outline 12A, OUTLINES SECTION. Tube requires duodecar 12contact socket and may be mounted in any position. Heater volts (acjdc), 6.3;
amperes, 0.6; warm-up time (average), 11 seconds.
6Kll
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE . . . . . . . . . . . . . . . . .
GRID VOLTAGE:
Negative-bias value ........................ .
Positive-bias value ......................... .
CATHODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . .
Unit
No.1
330 max
-50
0
20
2.75
max
max
max
max
Units No •.
II and 3
330 max
-50 max
0 max
0.3 max
volts
volts
volts
rna
watts
323
RCA Receiving Tube Manual
PEAK HEATER-CATHODE VOLTAGE:
200 max
200° max
Heater negative with respect to cathode ...
Heater positive with respect to cathode ..
200 max
200 0 max
volts
volts
Characteristics:
250
-8.5
17
7700
2200
10.5
Plate Voltage ..... .
Grid Voltage ......... .
Amplifica tion Factor ..... ' ......... .
Plate Resistance (Approx.) .
Transconductance .. .
Plate Current. ............................... .
Grid Voltage (Approx.) for plate current of 10 ,..a.
o The de component must not exceed 100 vol ta.
-24
volts
volts
250
-2
100
62500
1600
1.2
ohms
,umhos
rna
volts
H
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in color and
black-and-white television receivers
employing series-connected heater
Related type:
strings. The triode unit is used in syncBKAB
separator circuits; the pentode unit
Pr
Pp
has two independent control grids and is used in gated-agc-amplifier and noiseinverter circuits. Outline 8D, OUTLINES SECTION. Tube requires miniature
nine-contact socket and may be mounted in any position. For curves of average
plate characteristics for triode unit, refer to type 6A W8-A.
6KA8
HEATER VOLTAGE (A/C) . . . . . . . . . . . . . .
HEATER CURRENT . . . . . . . . . . . . . . . . . . . .
HEATER WARM-UP TIME (AVERAGE) . . . . .
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate ............................. .
Grid to Cathode, Heater, and Internal Shield ..
Plate to Cathode, Heater, and Internal Shield.
Pentode Unit:
Grid-No.1 to Plate ............................................... .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
Grid No.1 to Grid No.3. . ..
. .......... .
Grid No.3 to Plate ........................................ .
Grid No.3 to All Other Electrodes, Heater, and Internal Shield.
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Ma",imum Values):
6.3
0.6
11
volts
ampere
seconds
2.2
2.8
2.2
pf
pC
pf
0.1 ma'"
9.5
0.5
2.2
7
pf
pC
pf
pI
pC
Triode Unit
300 ma",
PLATE VOLTAGE .. '
GRID VOLTAGE:
o max
Positive-bias value ..
Negative-bias value ..
-50 max
AVERAGE CHARACTERISTICS
PENTODE uNIT
TYPE 6KA8
Ef:6.3 VOLTS
I
GRID-No.3 VOLT$:O
GRID-No.2 VOLTS=IOO
0"
-
~J
5
~
~
..... 1--
....... .(,
....... 0
~$/
y
.. ",
V
/
......
-, ~t:-- 1--l ~:=-=
-, -- "-
,......-
50
-
t--
100
1---I
I-
1--
r--1.5
-2
150
200
PLATE VOLTS
324
1
-0.5 . -
-I-
-- -
It:- t-
V
,/"
....... ./'c",
~"l,
0
5
~
I
...- V-
250
300
92CM-11594T
volts
volts
volts
========= Technical Data =========
PLATE DISSIPATION .................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .. .
Heater positive with respect to cathode ..... .
Triode
Unit
200
Characteristics:
Plate Supply Voltage ....
Grid-No.3 Supply Voltage.
Grid-No.2 Supply Voltage ..... .
Grid-No.1 Supply Voltage ....................... .
Cathode-Bias Resistor ....... .
Amplification Factor. . . . . . . . . . . . . . .
. ........... .
Plate Resistance (Approx.) .................. .
Transconductance, Grid No.1 to Plate .. .
Transconductance, Grid No.3 to Plate.
Plate Current.... .
. ......... .
Grid-N 0.2 Current ........ .
Grid-N 0.• Supply Voltage (Approx.):
For plate current of 10 I'a. . . . . . . . ............. .
For plate current of 20 I'a ........................... .
Grid-N 0.3 Supply Voltage (Approx.) for plate current of 20 I'a.
-2
70
17500
4000
1.1 max
watts
200 max
200·max
Pentode
Unit
150
0
100
0
180
volts
100000
4400
600
4
2.8
-5
-4
-7
volts
volts
volts
volts
volts
ohms
ohms
I'mhos
I'mhOB
ma
rna
volt.
volts
volts
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation ...
For cathode-bias operation ....................... .
Triode Unit
o.25 max megohm
1 max megohm
GATED AGC AMPLIFIER AND NOISE INVERTER
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ........................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE- ............................... .
GRID-No.3 (CONTROL-GRID) VOLTAGE:
Positive-bias value. . . . . . . . . . . . . . . . . . . . . . . . . . .
. ........... .
Negative-bias value. , ............................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ..................... .
GRID-No.2 VOLTAGE. . .............
. ............... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Positive-bias value.. . . . . . . . . . . .
. ....................... .
Negative-bias value. . . .
. ....... , . . .
. ................... .
PLATE DISSIPATION. . . .
. ........................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ...... .
For grid-No.2 voltages between 150 and 300 volts ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......... .
Heater positive with respect to cathode ............... .
Pentode Unit
300 max
600 max
volts
volts
o max
volts
-100 max
volts
300 max
volts
See curve page 70
o max
-50 max
2 max
volts
volts
watts
1. 1 max
watts
See curve page 70
200 max
200·max
volts
volts
AVERAGE CHARACTERISTICS
PENT ODE UNIT
TYPE 6KA8
GRID-No.2 VOLTS=IOO
GRID-No.1 VOLTS"O
0
5
e __ ~
~.t'0
:rc~ __
-4
t--.....
_
'r-'::::+-'\.~
~k
o ,,,:z.
V·01
o
ffi
~C;!>
It:
o
~
--- f::::-8
'=-
l - +--
--
~
1--
I r--.. ry'?'- ,:z.t--<...,-' ...-::::::
1-P ...c::::::
--/ V -~--rF- -- kf/ .--
I
~
f.>-c'
k
Z
J
.:"
5/
o
/
--
IC2
/
l/rl
1:S'E.~
V~
GR\O-~o.'!>
50
100
__
.~
--
ISO
-~
,6~
V
I-'"
200
PLATE VOLTS
-'!....250
300
92CM-II606T
325
RCA Receiving Tube Manual
Maximum Circuit Values:
Grid-No.8-Circuit Resistance.
0.68 max megohm
Grid-No.1-Circuit Resistance:
o. 5 max megohm
For fixed-bias operation.
For cathode-bias operation.
1 max megohm
-The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-1ine, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
-The de component must not exceed 100 volts.
MEDIUM-MU TRIODE
SHARP-CUTOFF PENTODE
H
Miniature type used as combined
vhf oscillator and mixer tube in television receivers. Outline 8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket and
PT
may be mounted in any position. Heater volts (ac/dc), 6.3; amperes, 0.4.
6KD8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE..
. ........ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .....
GRID-No.2 VOLTAGE.
...
. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ....
PLATE DISSIPATION. .
. ........ .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts .....
For grid-No.2 voltages between 165 and 330 volts.
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .....
Heater positive with respect to cathode.
Triode
Unit
330 max
Pentode
Unit
330 max
330 max
volts
volts
See curve page 70
volts
o max
watts
3 max
o max
2.5 max
0.55 max
watt
See curve page 70
200 max
200"max
200 max
200"max
volts
volts
125
125
110
-1
volts
volts
volt
0.2
5000
9.5
3.5
-8
megohm
,umhos
rna
rna
volts
Characteristics:
Plate Voltage ..... .
Grid-No.2 Voltage ... .
Grid-No.1 Voltage ... .
Amplification Factor ... .
Plate Resistance (Approx.) ....
Transconductance ..
Plate Current .....
Grid-N 0.2 Current. ................................... .
Grid-No.1 Voltage (Approx.) for plate current of 20 "a .... .
-1
40
7500
13.5
-9
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance:
For fixed-bias operation ....
For cathode-bias operation.
• The de component must not exceed 100 volts.
0 5 max
1 max
0.5 max megohm
1 max megohm
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Kp
7 G3p
Miniature type with frame-grid
IS
pentode unit used as combined oscillator-mixer tube in television receivers
Related type:
using an intermediate frequency in the
5KE8
order of 40 megacycles. Outline 8B,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position.
6KE8
HEATER VOLTAGE (AC loe) ...... ................................. .
HEATER CURRENT ............................ .
DIRECT INTERELECTRODE CAPACITANCES:o
Triode Unit:
Grid to Plate ....................................... .
Grid to Cathode, Heater, Pentode Cathode, Pentode Grid
Grid No.3, and Internal Shield ................... .
Plate to Cathode, Heater, Pentode Cathode, Pentode
Grid No.3, and Internal Shield. . . . . . .
. .............. .
326
6.3
0.4
volts
ampere
1.3
pI
2.4
pC
2
pf
Technical Data ------------------PENTODE UNIT:
Grid No.1 to Plate ................................. .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3,
and Internal Shield .......................... .
Plate to Cathode, Heater, Grid No.2, Grid No.3,
and Internal Shield ................................ .
Heaterto Triode Cathode and Pentode Cathode ... .
0.015 max
pI
5
pI
3.4
5.5"
pI
pI
CLASS Al AMPLIFIER
Pentode
Triode
Maximum Ratings, (De8ign-Maximum Value8):
Unit
Unit
PLATE VOLTAGE ............................. .
280 max
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .... .
GRID-No.2 VOLTAGE ............................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value
o max
CATHODE CURRENT ................................ .
20 max
PLATE DISSIPATION ....................... .
2 max
GRID-No.2 INPUT:
For grid-No.2 voltages up to 140 volts ........................ .
For grid-No.2 voltages between 140 and 280 volts ............. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative witb respect to cathode.
Heater positive with respect to cathode . ...
280 max
volts
280 max
volts
See curve page 70
o max
volts
20 max
rna
2 max
watts
0.5 max
watt
See curve page 70
200 max
200·max
volts
volts
AVERAGE PLATE CHARACTERISTICS
TRIODE UNIT
TYPE 6KE8
E f =6.3 VOLTS
f
~y
",e"
"
....
40
~
c,-
°
5
r-
--=
E-
°
--~2
GRID-No.1 VOLTS EC'=O
r--0.4
-0.6
-0.8
Ib
>-<
-
' ....
0:::
ECI=O
0 .•
-
r100
150
1--
200
250
PLATE VOLTS
.-
--l
300
-1.2
-1.4
350
92CM-11903T
327
RCA ReceivingTube Manual
Triode
Unit
125
Characteristics:
Plate Supply Voltage ........... .
Grid-No.2 Supply Voltage ...... .
Grid-N 0.1 Supply Voltage ...... .
Cathode-Bias Resistor .......... .
Amplification Factor ......... .
Plate Resistance (Approx.) ..
Transconductance ......... .
Plate Current ........ .
Grid-N 0,2 Current. , ...... .
Grid-No, 1 Voltage (Approx.)
For plate current 100 "a ..
For plate current of 50 "a
Pentade
Unit
125
125
0
33
0
68
40
5000
8000
13
volts
volts
volts
ohms
125000
12000
10
2.8
5
ohms
",mhos
rna
rna
volts
-3
volts
Maximum Circuit Values:
Grid-N 0 . I-Circuit Resistance:
For fixed-bias operation. . . .
...............
0.5 max
0.25 max
For cathode-bias operation..
1 max
0,5 max
a With external shield connected to cathode of unit under test, except as noted.
- With external shield connected to ground.
• de component must not exceed 100 watts.
DIODESHARP-CUTOFF PENTOD!:
megohm
megohm
H
6KL8
Miniature type used in combined
if-amplifier and AM-detector service
in AM and AM/FM broadcast receivers. Pentode unit may also be used
as an rf- or if-amplifier or limiter tube;
the diode unit may be used for avc or detection. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be mounted in any
position. For curves of average plate characteristics for pentode unit, refer to type
6AU6A.
Relaled Iype:
12KL8
HEATER VOLTAGE (AC JOC). .
. ........... .
6.3
0,3
HEATER CURRENT .................... .
DIRECT INTERELECTRODE CAPACITANCES:
Pentode Unit:
Grid No.1 to Plate, .. "" ... " .... " .... , ........................ .
0.002 max
Grid No.1.to Cathode, Heater, Grid No.2, Grid No.3 and IntErnal St,ield
6
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield.
5
Pentod. Grid No.1 to Diode Plate...
. ......... .
o 0015 max
Pentode Plate to Diode Plate ...... '
0.09
volts
ampere
pf
pf
pf
pI
pI
PENTODE UNIT AS CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
300 max
PLATE VOLTAGE . . . . .
GRID-No.3 (SUPPRESSOR-GRID) VOLTAGE:
Negative value ....... .
Positive value. . . . . . .. ..,.. ........ . ..
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .. .
GRID-No.2 VOLTAGE ............... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Positive-bias value.. . ....... .
Negative-bias value ................. .
GRID-No.3 INPUT .......... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ........ .
For grid-No.2 voltages between 150 and 300 volts ...
PLATE DISSIPATION ... , ........... , .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode.
Heater positive with respect to cathode.
BULB TEMPERATURE (At hottest point).
<
•••••••••
-300
300
300
See
volts
max
volts
max
volts
max
volts
curve page 70
o max
-50 max
0.2 max
volts
volts
watt
0.6 max
watt
See curve page 70
3 max
watts
200 max
200-max
150 max
volts
volts
°C
Characteristics:
Plate Voltage ..................... ' . . . .. . ................ .
GiliN~ ............................ .
Internal ShIeld .................... .
Grid-N 0.2 Voltage ...................................... .
328
.......
100
volts
Connected to cathode at socket
Connected to cathode at socket
100
volts
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;0
Technical Data
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;=
Grid-No.1 Supply Voltage ............................................ .
Grid-No.1 Resistor (Bypassed) ........................................ .
Plate Resistance (Appro".) ........................................... .
Transconductance . .................................................. .
Plate Current ....................................................... .
Grid-No.2 Current ................................................... .
Grid-No.1 Voltage (Appro".) for plate current of 10 I'a ................... .
0
2.2
0.55
4300
5.5
2.2
4.2
volts
megohm.
megohm
I'mhos
rna
nia
volts
DIODE UNIT
Maximum Ratings, (Design-Maximum Values):
PLATE CURRENT ..•..•...............•.............•......••...•...•.•
PEAK HEATER-CATHODE VOLTAGE:
1 max
rna
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
200 max
200-max
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 2 rna .......................... .
-The de component must not exceed 100 volts.
10
volts
DIODETHREE-PLATE TETRODE
Po
Miniature type used in frequencydivider and complex-wave generator
circuits of electronic musical instruments. In such circuits the tetrode
PIBTR
PZ TR
unit can provide three independent
output-signal voltages; the diode unit can be used as a key in a vibrato circuit.
Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket
and may be mounted in any position.
6KM8
HEATER VOLTAGE (AC /oe) ............................................ .
HEATER CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECT INTERELECTRODE CAPACITANCES:
Tetrode Unit:
Grid No.1 to Plate No.1A ........................................ .
Grid No.1 to Plate No.1B ........................................ .
Grid No.1 to Plate No.2 .......................................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Internal Shield ........ .
Plate No.1A to. Cathode, Heater, Grid No.2, and Internal Shield ..... .
Plate No.1B to Cathode, Heater, Grid No.2, and Internal Shield ...... .
Plate No.2 to Cathode, Heater, Grid No.2, and Internal Shield ........ .
Tetrode Grid No.1 to Diode Plate ..................................... .
Tetrode Plate No.1A to Diode Plate ................................... .
Tetrode Plate No.1B to Diode Plate ...... , ........................... .
Tetrode Plate No.2 to Diode Plate ..................................... .
6.S
0.3
0.02
0.02
0.06
5.5
1.2
1.3
1.8
0.024
0.18
0.024
0.013
volts
ampere
max
mar
max
max
pf
pf
pf
pf
pf
pf
Pf
pf
pf
pf
pf
AVERAGE CHARACTERISTICS
TYPE 6KMB
Et-6.3 VOLTS
GRID-No.2 VOLTS-IOO
PLATES IA,IB, AND 2 CONNECTED
TOGETHER AT SOCKET•
...'"
...
...
,.
0:
2
::;
..J
0.1 0
ti
.;
Of
GAIO-No.1 VOLTS
8
~
o
a:
'"o
0:
6
E~O
r-
:7 ~ r4~
~
~ -...-. ~
2100-
-0.'
I
I
l'c~
-I
J",
EClaO
o
100
-2
-1'"--,--:
r-~
200
=== =--400300
PLATE VOLTS
o
00
6 o0
92CM-i17!'3Tt
329
RCA Receiving Tube Manual
TETRODE UNIT AS CLASS A, AMPLIFIER
Plates No. lA, lB, and II connected together
Characteristics:
Plate Voltage ....................................................... .
Grid-No.2 Voltage ................................................... .
Grid-No.1 Supply Voltage ............................................ .
Grid-N 0.1 Resistor (Bypassed) ........................................ .
Plate Resistance (Approx.) ........................................... .
Transconductance ................................................... .
Plate Current ................................................... , ... .
Grid-No.2 Current .........................•..........................
Grid-No.1 Voltage (Approx.) for plate current of 20 ,.a ................... .
100
100
volts
volts
volts
megohms
ohms
,.mhos
o
2.2
30000
3400
4.2
1.7
-4
ma
ma
volts
Triode Connection-Plates No.lA, lB, and II connected to grid No. II
Characteristics:
Plate Voltage ....................................................... .
Grid-No.1 Supply Voltage ............................................ .
Grid-No.1 Resistor (BypaBBed) ........................................ .
Transconductance .................................................. ..
Amplification Factor ................................................. .
Plate Current ....................................................... .
100
volts
volts
megohms
,.mhos
o
2.2
4500
45
5.5
Separate plate operation; plates not under tesl grounded
Pial.
lA
IB
Plate Voltage .............................. .
100
100
Grid-No.2 Voltage .......................... .
100
100
Grid-No.1 Supply Voltage ................... .
o
0
Grid-No.1 Resistor (Bypaased) ............... .
2.2
2.2
Transconductance .......................... .
2000
2000
Plate Resistance (Approx.) .................. .
0.1
0.1
Plate Current .............................. .
2.3
2.3
Grid-No.2 Current .......................... .
3.8
3.8
ma
2
100
100
volts
volts
volts
megohms
,.mhos
megohm
ma
ma
o
2.2
1800
0.12
2.1
3.3
TETRO DE UNIT AS FREQUENCY DIVIDER AND COMPLEX-WAVE GENERATOR
Maximum Ratings, (Design-Ma:!:irnurn Values):
PLATE VOLTAGE (Each plate) ......................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............................. .
GRID-No.2 VOLTAGE ................................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Positive-bias value ............................................... .
Negative-bias value .............................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ......................•.......
For grid-No.2 voltages between 165 and 330 volts ................... .
PLATE "DISSIPATION (Each plate) ....................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ....•..... " ................ .
330 rna:!:
volts
330 ma:!:
volts
See curve page 70
o ma:!:
-50 rna:!:
0.65 ma:!:
watt
See curve page 70
1 max
watt
200 rna:!:
200llma:!:
AVERAGE PLATE CHARACTERISTICS
TYPE 6KMB
E,.6.3 VOLTS
GRID-No.2 CONNECTED TO PLATES IA.
IB AND 2 AT SOCKET.
0
~
..
r' 5
c
,
:t!
(
;~O'
...:::;
~O/
ii
~I0
....
7
/
5
J
50
[7
[7
7
7
./
[£- V Y
o
330
1.",0/
..."'/
0"
V
V
V
V
[7
/
/
-
/
/
150
i1
,"'/
V1f2
_j'"
/ ,~
/ /
, / . . . . V ./V./Vl/r:->
,1....
yo
V V Y V
100
17
,/
-
""
,/
200
PLATE VOLTS
,_
.......... ~ '/V~
250
300
volts
volts
350
400
92CM-I0695T2
volts
volts
========= Technical Data =========
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For grid-No.l-resistor-bias operation ................................. .
2.2 max megohms
DIODE UNIT
Maximum Ratings, (Design-Maximum Values):
PLATE CURRENT .......... .
max
Characteristics, Instantaneous Values:
Tube Voltage Drop for plate current of 2 rna ..... .
-The de component must not exceed 100 volts.
G3P
H.IS
rna
10
volts
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a variety
of applications in television receivers.
The pentode unit is used as an if-amplifier tube, and the triode unit as a
KT
Pp
sync-separator or voltage-amplifier
tube. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact
socket and may be mounted in any position. Heater volts (ac/dc), 6.3; amperes, 0.6.
PT
6KT8
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .... .
GRID-No.2 VOLTAGE.... ..
. ............... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATiON ..................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ............... .
For grid-No.2 voltages between 165 and 330 volts ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...... .
Heater positive with respect to cathode .... .
Characteristics:
Plate Voltage..........
. ....................... .
Grid-No.2 Voltage..............
. ............... .
Grid-No.1 Voltage ...................................... .
Amplification Factor .............................. .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 20 p.a ...... .
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation ......................... ..
• The dc component must not exceed 100 volts.
H
Triode
Unit
330 max
o max
1 max
Pentode
Unit
330 max
volts
330 max
volts
See curve page 70
volts
o max
2.5 max
watts
0.55 max
watt
See curve page 70
200 max
200·max
200 max
200·max
volts
volts
250
125
125
-1
volts
volts
volts
150000
10000
12
4.5
-7
ohms
p.mhos
rna
rna
volts
-2
100
31500
3200
1.8
-3.5
0.5 max
1 max
0.5 max megohm
1 max megohm
HIGH-MU TRIODESHARP-CUTOFF PENTODE
6KV8
Miniature type with frame-grid
pentode unit used in black-and-white
Related type:
television receivers. The triode unit is
llKV8
used in general-purpose voltage-amplifier, sync-separator, and sound-ifamplifier applications. The pentode unit is used as a video output tube. Outline 8D,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position. For curves of average plate characteristics for triode
unit, refer to type 6A W8-A.
HEATER VOLTAGE (AC joc) . .......................................... .
HEATER CURR.ENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Triode Unit:
Grid to Plate ................................................. ..
6.3
0.775
3.7
volts
ampere
pf
331
RCA Receiving Tube Manual
Grid to Cathode, Heater, Pentode Cathode, Pentode Grid No.3,
.and Internal Shield ...
Plate to Cathode, Heater, Pentode Cathode, Pentode Grid No.3,
and Internal Shield.
Triode Grid to Pentode Plate.
Pentode Unit:
Grid No.1 to Plate ...
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and InternalShield
Plate to Cathode, Heater, Grid No.2, Grid No.3, and InternalShield.
Pentode Plate to Triode Plate ..
2,5
pf
2 4
0,015 max
pf
0.09 max
13
4,8
0,17 max
pf
pC
pf
pf
CLASS Al AMPLIFIER
Triode
Unit
300 max
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE. .. . ......... ,
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ...... .
GRID-No.2 VOLTAGE ....
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ...
PLATE DISSIPATION ....
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts. , ........ ' .
For grid-No.2 voltages between 150 and 300 volts ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .... .
Heater positive with respect to cathode ..... .
Characteristics:
Plate Supply Voltage.
GridcNo.2 Supply Voltage, .. .
Grid-No.1 Supply Voltage ........ , ..... .
Cathode-Bias Resistor ....... ,
Amplification Factor ......... ,
Plate Resistance (Approx.) .
Transconductance.
. ........... .
Plate Current,
Grid-N 0.2 Current ..... .
Grid-N 0.1 Voltage (Approx.) for plate current of 100 "a
o max
Pentode
Unit
300 max
volts
300 max
volt.
See curve page 70
o max
volt.
1 max
5 max
200 max
200·max
200
-2
70
17500
4000
4
-4.5
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation, .. , ....... , ...... .
For cathode-bias operation ...................... , ... .
0.5 max
1 max
200
125
0
68
volts
volts
volts
ohms
55000
21000
16.5
3,1
-3.8
75000
23000
19
3.1
-3.8
ohms
.umbos
rna
rna
volts
o.1
o.25
max megohm
max megohm
AVERAGE CHARACTERISTICS
PENTODE UNIT
TYPE
ffi
"-
a
:li.
:::;
..J
i
f
N
~4 0
v
I
o
"'
....
<>3
no
a
o
~2 0
...
:l"-I 0
+I
GRID-No.2 VOLTS
c
125
~ -~
",50
u
~
6KV8
Efa 6.3 VOLTS
' <:::: I£L f - -
Eer -0
-2
....100
200
300
400
PLATE VOLTS
332
volts
volts
125
125
0
82
• The de component must not exceed 100 volts.
~ 70
watts
1 max
watt
See curve page 70
92CM-1I946T
----------------=
P~
~C
___
2
7
H
H
I
NC
G2
8
K
Technical Data
----------------=
MEDIUM-MU TRIODE
G1a.s octal type used as detector, amplifier,
or oscillator in radio receivers. Outline 22, OUT-
LINES SECTION. Heater volts (ac/dc), 6.3;
amperes, 0.15. Typical operation and characteristics: plate volts, 250 rna",; grid volts, -9; plate
6L5G
rna., 8; plate reSIstance, 9000 ohms; amplifiea...
tion factor, 17; transconductance, 1900 IImhos;
grid voltage for cathode-current cutoff, -20.
Thi. is a DISCONTINUED type listed for
"~
· · · M~::='=~~:~n:~~':
GI
reference only.
6L6
O
;/
I !/
TYPE 6W6-GT
E.f:;:6.3 VOLTS
t--
II
17
ii
or-!-
r-li
j
II
u
"::;J
/
"
..
WID 0
~
J
/
0
/
V
/
/
I
/
/
100
J
L
V ./'V
200
300
/'
0
/
/
/
/
V
)1
I
/
CONNECTED TO PLATE
GRID-N~2
/
./
V
/
/
/
7
;
/
V
V
4 00
'00
PLATE VOLTS
/
600
700
92CM-7943T
351
RCA Receiving Tube Manual
SHARP-CUTOFF PENTODE
Glass octal type used as biased detector
or high-gain amplifier in radio receivers. Out"~
linell3, OUTLINES SECTION. Tube requires
6W '''\J
octal socket. Heater volts (ac/de), 6.3; amperes, 0.15. Maximum ratings: plate volts, 300
max; grid-No.2 (screen-grid) voltll,100 max; gridNo.2 3upply volts, aoo max; g;id-No.1 (controlgrid) volts, 0 max; plate dissipation, 0.5 maz
watt; grid-No.2 input, 0.1 max watt. Within its maximum ratings, t:tic type is identical electrically
Wltn type 6J7. Type 6W7-G is a DISCONTINUED type listed for reference only.
~H4
"3
FULL-WAVE VACUUM RECTIFIER
f,NC
P01
e
Miniature type used in power supply of automobile and ae-operated radio
receivers. Equivalent in performance
NC 2
7 K
R.I~':.!"'.
to larger types 6X5 and 6X5-GT. Type
6X4 requires miniature seven-contact
P~2
socket and may be mounted in any position. Outline 7C, OUTLINES SECTION.
It is especially important that this tube, like other power-handling tubes, be adequately ventilated. For discussion of Rating Chart and Operation Characteristics,
refer to INTERPRETATION OF TUBE DATA. Heater volts (ac/dc), 6.3 A ; amperes, 0.6.
6X4
FULL-WAVE RECTIFIER
Maximum Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE •••••.•.•.•.•.•.•.•••••.•.•.•.•.•.•.•.•.... 1250 max
volts
STEADy-8TATE PEAK PLATE CUlIlIENT (Per Plate) .••......•............... " 245 max
ma
AC PLATE SUPPLY VOLTAGE (Per Plate. rms). • • • • . . . • . • . • . • . . . . . . . . . . . . . . . . See Rating Chart
DC OUTPUT VOLTAGE (At tilterinput)t..................................... 350 max
volts
DC OUTPUT CUlIlIENT (Each plate)t. . .. .. . • . . . . . .. .. . . . .. . . . . . . . . . • . . . .. • . 45 max
ma
H0T-8WITCHING TRANSIENT PLATE CURRENT............................... #
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. .. • .. . . . .. • . • • • • • • . • . • . • • • • . . • • • 450 max
volts
Heater positive with respect to cathode ....................... " ••••. ..• 200·max
volts
FULLO~~~l6~~ITC~~~tECI~~~~Sid~1tTER
-
70o
~",--f--AS SHOWN I lOll
f--- f--60o
o
\
1\\
I"
:>
~40
~\ ,~ "f.
0
I' ,
~
~300
o
r/, /
"0
~c!~ ,
,
~'
>
,
\0
[f.(o
"
r-10o
352
20
;~~I---~ ~~
r-
0
:>
5.)~ ~
~400
450 ....
/
"
.....PLATE
I
g
A
40
60
80
100
DC LOAD MILLIAMPERES
92CM-8030TI
6
';';::;:SP~h.
................
& i""---.........
~r-.
g
'"..
r-:",
~I/-;:'Ioo...-
;300
~300~0
~
.....
_,
L-o~~I..::-+__I-+:!I.:-I-+__I-~
.~
... ,
B
,/
PER
......
/
250
V
C
7
400
jll / ~~.....
I!~~.
o
......... '-D
'':'00
II
ISOV/RMS
~4 ~-"
~600~'~~~~~4--4--+--+--~~
7 '.
3Jo
325
300
~ 1&.L200
TYPE 6X4
E .,,= 6.3 VOLTS
FILTER-INPUT CAPACITOR = lOll'"
TOTAL ErrEC~ PLATE-SUPPLY IMPEDANCE
PER PLATE {520 OHMS FOR CURVES 1-5
400 OHMS FOR CURVES 6-8
700 DE, = SEE RATING CHART
d
,.!-~
~\
\ , h~1y
1\ ',,'0 '~ ....
r-
FULL-w:..~ER~J~SI~. cS.~tc~~~~~rflJgbC~LTER
I
TYPE 6X4
SUPPLY ,REQUENCY=60CPS
E ~= 6.3 VOLTS
--CHOKES or INFINITE INDUCTANCE
----- CHOKES or VALUES SHOWN
- - BOUNDARY LINE FOR CHOKE VALUES
SHOWN
CBA=SEE RATING CHART
8
"
E
~~
""--i-- -4
-1--1-1'-1--1-- 1\
t--I--r-.
~2001~~~+-~~~-+--~-+--~-4~
o"~
"
100
o
~,
A
20 DC
L~Y> MILLI:~PERES 80
100
92CM-8031T1
========= Technical Data --========
Typical Operation:
Sine-Wa,,. Operation Vibrator Operation
Filler Input
Capacitor
Choke
Capacitor
AC Plate Supply Voltage (Each plate, rms)-..
326
400
volta
Filter Input Capacitor. . . . .. .... .. ..... .. .........
10
10
1'1
Effective Plate Supply Impedance (Each plate) . . . . .. 625
ohm.
FilterInput Choke .. " ..................... . .. ...
10
henries
70
DC Output Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
70
70
rna
DC Output Voltage at Input to Filter (Approx.). . ... 310
340
240
volta
• When the heater is operated from a 3-cell (nominal-6-volt) storage-battery source, the permissible
heater-voltage range is from 5 to 8 volts.
t This rating applies when the 6X4 is used in vibrator operation with a minimum duty cycle 01 75
per cent.
# If hot-switching is regularly required in operation, the use of choke-input circuits is recommended.
Such circuits limit the hot-switching current to a value no higher than that of the peak plate current.
When capacitor~input circuits are used, a maximum peak current value per plate of 1.1 amperes during
the initial cycles of the hot-switching transient should not be exceeded.
• The dc component must not exceed 100 volts.
- AC plate supply voltage is measured without load.
RATING CHART
TYPE 6X4
~
Ef ' 6.3 VO"::XIMUM OPERATING VALUCS WITH:
~ 50
.r.CHOKE -INPUT FILTER
.
...
t-:-::
F A 45
a:
...~40
a:
~
~ 30
::;
..I
i 20
.....
5
g
10
g
r CAPACITOR -INPUT FILTER
I--- Lt
1-31
1
1
1-2~
-
8!,
-- --- ~ r"
-- --- f~D
1
1
1
1
127
C
1
-j
1
1
1
1
350 G 450
100
200
300
400
~oo
AC PLATE SUPPLY VOLTS (RMS) PER PLATE (WITHOUT LOAD)
o
P02~PDI
3
H 2
7 H
,92CS-e02!H2
FULL-WAVE VACUUM RECTIFIER
Metal type 6X5 and glass octal
type 6X5-GT are used in power supply of automobile and ac-operated re-
6X5
6XSGT
c~ivers.
Outlines 5 and 14C, respecNC'6X5-(;T
tlvely, OUTLINES SECTION. Type
6X5-GT may be supplied with pin No.1 omitted. Both types require octal socket.
Type 6X5 should be mounted in vertical position, but horizontal operation is permissible if pins 3 and 5 are in horizontal plane. Type 6X5-GT may be operated in
any position. For maximum ratings, and typical operation, refer to type 6X4.
Type 6X5 is a DISCONTINUED type listed for reference only.
S6X5 1 8 K
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as combined
oscillator and mixer tube in television
Relaled types:
receivers utilizing an intermediate fre5XI,19XI
quency in the order of 40 megacycles
Pp
per second. In such service, the 6X8
gives performance comparable to that obtainable with a 6AG5 mixer and an
oscillator consisting of one unit of a type 6J6. When used in an AM/FM receiver,
the triode unit is used as an oscillator for both sections. In the AM section, the
pentode unit is used as a high-gain pentode mixer; in the FM section, the pent ode
unit is used either as a pentode mixer or as a triode-connected mixer depending on
signal-to-noise considerations. Outline 8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket and maybe mounted in any position.
6X8
353
RCA Receiving Tube Manual
HEATER VOLTAGE ..•...••..••.......•...... '" . " . " . " . " .....
HEATER CURRENT .........•.........•..........................
Without
DIRECT INTERELECTRODE CAPACITANCEs:
External
TRIODE UNIT:
Shield
Grid to Plate ...•..................................
1.5
Grid to Cathode and Heater ........................ .
2
Plate to Cathode and Heater ....................... .
0.5
PENTODE UNIT:
Grid No.1 to Plate ................................ .
0.09 max
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ..
4.6
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ... .
0.9
Pentode Grid No.1 to Triode Plate ..................... .
0,05 max
Pentode Plate to Triode Plate ......................... .
0.05 max
Heater to Cathode ................................... .
6.5
" With external shield connected to cathode except as noted.
- With external shield connected to pentode plate.
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ....................................... ..
GRID No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 137.5 volts ............. .
For grid-N 0.2 voltages between 137.5 and 275 volts ..... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .............. .
Heater positive with respect to cathode .............. .
6,3
0,46
With
External
Shield"
1.5
2.4
1
0,06 max
4.8
1.6
0,04 max
0.008 max
6.5-
Triode Unit
275 max
volt.
ampere
pf
pf
pf
pf
pf
pf
pf
pf
pf
Pen/ode Unit
275 max
volt.
275 max
volt.
See curve page 70
o max
volt.
2.3 max
watts
o max
1.7 max
0.45 max
watt
See curve page 70
200 max
200·max
volt.
volts
Characteristics:
Triode Unit Pen/ode Unit
Plate Voltage ........................................ '"
125
125
volt.
Grid No.3 ............................................. .
- Connected to cathode at socket
Grid-No.2 Voltage ...................................... .
125
volt
Grid-No.1 Voltage... ................... . ... .... .. .. ..... -1
-1
volt
Amplification Factor.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Plate Resistance (Approx.) ............................. " 6000
300000
ohms
Transconductance ....................................... 6500
5500
"mhos
Plate Current.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
9
rna
Grid-No.2 Current .................................... "
2.2
rna
Grid-No.1 Voltage (Approx.) for plate current of 20 "a, ..
-7
-6.5
volts
• The de component must not exceed 100 volts.
AVERAGE PLATE
,. v
CHARACTERISTICS
TRIODE UNIT
np£ 6X8
E.,.
=6.3 VOLTS
v
o
354
100
ISO
200
250
PLATE VOLTS
300
3.0
tZCM-1$3IT
Technical Data
AVERAGE PLATE CHARACTERISTICS
PENT ODE UNIT
•
/'
...
...
III
1/
II:
~2 0
.J
-1.0
/1\
Z
I
";;:1 0
\~" ~ \~
Y.' \ ..
• "...,
,
V
0
*
P0 2
3
~o
2
I
24
5
POI
6
H
~
"3
-I.~
lb
---- -- -.
100
-2.0
.-
+~~
_-2.5
:'3.0 -ECI=O
r-'
"0
"'-,;;.
ID
.- .--- --1,0
-4.0
2~0
200
PLATE VOLTS
300
92CM-7~32T
FULL-WAVE VACUUM RECTIFIER
4K
ES
H
-0.5
/
'•"
.II
r-
GRID-Nt 3 VOL.TS:;! 0
0
lb
£1•
"~
~;:=O~,!."~'-JOS~TS=I$O -
1... voLTS ie, =
G1RIO-N
II
-<
::;
:i
.:;
TYPE 6X8
+O.S
Gla•• type used in power supply of radio receivers. Maximum dimensions: over-all length,
4-3/16 inches; seated height, 3-9/16 inches; diameter, 1-9/16 inches. Heater volts (ac/dc), 6.3;
amperes, 0.8. The maximum ae plate voltage
per plate is 350 volt. (rms), and the de output
current i. 50 rna. This i. a DISCONTINUED
type listed for reference only.
6Y5
sCI
BEAM POWER TUBE
6Y6G
6Y6GA
Glass octal types used as output
amplifier in radio receivers. Also used
2
7
H
H
in rf-operated, high-voltage power sup16K
plies in television equipment. Except
NC
G3
for envelope size and direct interelectrode capacitances, type 6Y6-G and type 6Y6-GA are identical. Outlines 26 and
19B, respectively, OUTLINES SECTION. Tubes require octal socket and may be
mounted in any position.
HEATER VOLTAGE rAC/DC) ........................................... .
HEATER CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate. . . ...............................
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3
Plate to Cathode, Heater, Grid No.2, and Grid No.3.....
6Y6-G
0.7
15
11
6.3
1.25
6Y6-GA
0.7
12
7.5
volt.
amperes
pC
pC
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................. .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ........................................... .
GRID-N 0.2 INPUT:
For grid-No.2 voltages up to 100 volts ............................ .
For grid-No.2 voltages between 100 and 200 volts .................. .
PLATE DISSIPATION ............................................ '" .. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......... .
Heater positive with respect to cathode .... .
Typical Operation:
Plate Voltage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 (Control-Grid) Voltage ........................ .
Peak AF Grid-No.1 Voltage ........... .
135
135
-13.5
13.5
200 max
volts
200 max
vol t.
See curve page 70
1.75 max
watts
See curve page 70
12.5 max
watts
180 max
180 max
volts
volts
200
135
-14
14
volts
volts
volts
volts
355
RCA Receiving Tube Manual
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...... ................................ .
Load Resistance ...................................... .. .
Total Harmonic Distortion .............................. .
Maximum-Signal Power Output ...................... .
58
60
3.5
11.5
,9300
7000
2000
10
3.6
61
66
2.2
9
18300
7100
2600
10
6
ma
ma
ma
rna
ohms
IJrnhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ................
0'
••••••••
O. 1 max
O. 5 max
••••••••••••••
megohm
megohm
HIGH-MU TWIN POWER TRIODE
6Y7G
6Z4
Glass octal type used as class B amplifier
in output stage of radio receivers. Outline 22,
OUTLINES SECTION. For electrical characteristics, refer to type 79. Heater volts (ac/dc),
6.3; amperes, 0.6. This is a DISCONTINUED
type listed for reference only.
Refer to type 84/6Z4
FULL-WAVE VACUUM RECTIFIER
6Z5
Glass type used in power supply of radio
receivers. Maximum dimensions: over-all length,
4-3/16 inches; seated height, 3-9/16 inches; diameter ,1-9 /16 inches. Heater volts (ac/ de), 12.6
(series), 6.3 (parallel); amperes, 0.4 (series), 0.8
parallel). Maximum ac plate volts (per plate),
230; maximum de output rna., 60. This is a
DISCONTINUED type listed for reference only.
~
PO~
4K
H 2
Po,
.50
I
HM
6
H
HIGH-MU TWIN POWER TRIODE
Glass octal type used as class B amplifier
in output stage of radio receivers. Outline 22,
OUTLINES SECTION. Tube requires octal
socket. Heater volts (ac/dc), 6.3; amperes 0.3.
Typical operation and maximum ratings as
class B power amplifier: plate volts, 180 max;
grid volts, 0; peak plate mao per plate, 60 max;
average plate dissipation, 8 max watts; zero·
signal plate mao per plate, 4.2; plate-t.o-plate load resistance, 12000 ohms; output watts, 4.2 with average
input of 32.0 milliwatts applied between grids. This is a DISCONTINUED type listed for reference only.
6Z7G
FULL-WAVE VACUUM RECTIFIER
6ZY5G
Glass octal type used in power supply of
radio equipment where economy of power is
important. Outline 22, OUTLINES SECTION.
Tube requires octal socket and may be mounted
in any position. Heater volts (ac/dc), 6.3;
amperes, 0.3. Maximum ratings: peak inverse
plate volts, 1250; peak plate rna. per plate,
120; de output ma., 40; peak heater-cathode
volts, 450. This is a DISCONTINUED type
listed for reference only.
MEDIUM-MU TRIODE
7A4
356
Glass lock-in type used as detector, amplifier,oroscillatorin radio equipment. Outline13A,
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 6.3; amperes, 0.3.
Maximum ratings, typical operating conditions,
and curves for type 7 A4 are the same as for
metal type 6J5. Type 7 A4 is used principally
for renewal purposes.
~
POI
FOZ 3
2
7
H
H
I
B
NC
K
N~
~
NC
P
~C
3
b
2
7
I
H
8
as
H
G
K
Technical Data
NC
~
NC
BEAM POWER TUBE
Glass lock-in type used as output amplifier
3
6
in radio receivers in which the plate voltage
available for the output stage is relatively low.
2
7 G3
Outline 13B, OUTLINES SECTION. Tube rep
K
quires lock-in socket. Heater volts (ac/dc), 6.3;
I
8
amperes, 0.76. Typical operation and maximum
ratings as class At amplifier: plate volts, 110
H
as H
(125 max); grid-No.2 volts, 110 (125 max);
grid-No.1 volts, -7.5; peak af grid-No.1 volts, 7.5; plate resistance (approx.), 16,000 ohm3; transconG2
4
5
G,
7AS
ductance 5800 ",mhos; plate rna., zero-3ignal, 40 (maximum-signal, 41); grid-No.2 rna., zero-signal, 3
(maximum-signal, 7); load resistance, 2500 ohms; total harmonic distortion, 10 per cent; maximum-
signal power output, 1.5 watts; peak heater-cathode volts, 90 max. This type is used principally for
renewal purposes.
TWIN DIODE
BS
Glass lock-in type used as detector, lowvoltage rectifier, oravc tube. Outline 13A,OUTLINES SECTION. Tube requires lock-in socket. Heater volts (ac/dc), 6.3; amperes, 0.15.
Maximum ratings as rectifier: ac plate volts
per plate (rms), 150; dc output mao per plate,
8; peak mao per plate, 45; peak heater-cathode
volts, 330. The application of this type is similar
to that of metal type 6H6. Type 7A6 is used
7A6
principally for renewal purposes.
REMOTE-CUTOFF PENTODE
Glass lock-in type used ao rf or if amplifier
in radio receivers. Outline 13A, OUTLINES
SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 6.3; amperes, 0.3. For maximum
ratings, typical operation, and curves, refer to
metal type 6SK7. Type 7A7 is used principally
7A7
for renewal purposes.
OCTODE CONVERTER
Glass lock-in type used as converter in
superheterodyne circuits. Outline 13A, OUTLINES SECTION. Tube requires lock-in socket. Heater volts (ac/dc), 6.3; amperes, 0.15.
Typical operation and maximum ratings as frequency converter: plate volts, 250 (300 max);
grids-No.3-and-No.5
volts, 100 max; grid-No.2
BS
supply volts, 250 applied through a 20000-ohm
dropping resistor (300 max); grid-No.2 volts, 200 max; plate dissipation, 1 max watt; grids-No.3-andN 0.5input, 0.3 max watt; grid-N 0.2 input, 0.75 max watt; grid-N 0.4 volts, -3 (0 max); grid-N 0.1 resistor,
50000 ohms; plate ma., 3; grids-No.3-and-No.5 ma., 3.2; grid-No.2 ma., 4.2; grid-No.1 ma., 0.4; plate
resistance (approx.), 0.7 megohm; conversion transconductance, 550 I'mhos ;peak heater-cathode volts,
90 max. This type is used principally for renewal purposes.
7A8
POWER PENTODE
G
es
Lock-in type used in output stage of video
amplifier of television receivers. Outline 13B,
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 6.3; amperes, 0.6.
Characteristics and maximum ratings as Clas3
Al amplifier: plate supply volts, 300 max; gridNo.2 supply volts, 150 (300 max); grid-No.2
7AD7
volts, see curve page 70; grid-No.1 volts, posi-
tive-bias value, 0 max; griq.-No.2 input, for grid-No.2 voltages up to 150 volts, 1.2 max watts (for grid
No.2 voltages between 15q and 300 volts, see curve page 70); plate dissipation, 10 max watts; cathodebias resistor, 68 ohms; plate rna., 28; grid-No.2 rna., 7: plate resistance (approx.), 0.3 megohm; transconductance, 9500 "mhos; peak heater-cathode volts, 90 max. Type 7AD7 is a DISCONTINUED
type listed for reference only.
357
RCA Receiving Tube Manual
MEDIUM-MU TWIN TRIODE
Glass lock-in type used as voltage amplifier
or phase inverter in radio equipment. Outline
13A,OUTLINES SECTION. Tube requires lockin socket. Heater volts (ac/dc), 6.3; amperes,
0.3. Characteristics and maximum ratings as
Class Al amplifier (each unit): plate supply
volts, 250 (300 max); grid volts, positive-bias
value,O max; cathode-bias resistor, 1100 ohms;
BS
plate rna., 9; transconductance, 2100 ,umhos;
amplification factor, 16; plate resistance (approx.), 7600 ohms, peak heater-cathode volts, 90 max. This type is used principally for renewal
purposes.
7AF7
SHARP-CUTOFF PENTODE
G3
~
4
5
IS
Glass lock-in type used as rf amplifier in
G2
GI
3
6
ae/de receivers or in mobile equipment where
low heater current drain is important. Outline
13A, OUTLINES SECTION. Tube requires
2
7
lock-in socket. Heater volts (ac/dc), 6.3; amP
I<
peres, 0.15. Characteristics and maximum ratI
8
ings as class Al amplifier: plate and grid-No.2
H
H
as
supply volts, 250 (300 max); grid-No.1 volts,
positive-bias value, 0 max; plate dissipation, 2
max watts; grid-No.2 input, 0.75 max watt; grid No.3 and internal shield connected to cathode at
socket; plate resistance (approx.), greater than 1 megohm; transconductance, 4200 ,umhos; cathodebias resistor, 250 ohms; plate rna., 6; grid-No.2 rna., 2; peak heater-cathode volts, 90 max. This type is
used principally for renewal purposes.
7AG7
SHARP-CUTOFF PENTODE
G3
~
4
5
IS
Glass lock-in type used as rf amplifier in
G2
GI
high-frequency and wide-band applications.
3
6
Outline 13A, OUTLINES SECTION. Tube requires lock-in socket. Heater volts (ac/dc) , 6.3;
amperes, 0.15. Characteristics and maximum
2
7
P
K
ratings as class Al amplifier: plate and grid-No.
2 supply volts, 250 (300 max); grid-No.2 volts,
I
8
250 (see curve page 70); grid-No.1 volts, posiH
BS
H
tive-bias value, 0 max; plate dissipation) 2 max
watts; grid-N 0.2 input, for grid-No.2 voltages up to 150 volts, 0.7 max watt (for grid-N 0.2 voltages from
150 to 300 volts, see curve page 70); cathode-bias resistor, 250 ohms; grid No.3 and internal shield connected to cathode at socket; plate resistance (approx.), 1 megohm; transconductance, 3300 J.'mhos;
plate rna., 6.8; grid-No.2 rna .. l.9; peak heater-cathode volts, 90 max. Type 7AH7 is used principally
for renewal purposes.
HTI
7AH7
MEDIUM-MU TWIN TRIODE
Miniature type used as combined
vertical deflection amplifier and vertical deflection oscillator in television
I
receivers. This type has a controlled
heater warm-up time for use in rePT2
HM
ceivers employing series-connected heater strings. Each unit may also be used as a
horizontal deflection oscillator, or in audio mixer, phase inverter, multivibrator,
sync separator and amplifier, and resistance-coupled amplifier circuits in radio
equipment. Outline 8B, OUTLINES SECTION. Heater volts (ac/dc), 7 in series
arrangement, 3.5 in parallel arrangement; amperes, 0.3 (series), 0.6 (parallel);
warm-up time (average) in parallel arrangement, 11 seconds. Except for heater
ratings, this type is identical with miniature type 12AU7-A.
7AU7
(
HIGH-MU TRIODE
7B4
358
Glass lock-in type used in re~dstance
coupled amplifier circuit•. Outline 13A, OUTLINES SECTION. Tube requires lock-in socket. Heater volts (acid c) , 6.3; amperes, 0.3.
Except for interelectrode capacitances, this
type has the same maximum ratings and characteristics as metal types 6F5 and 6SF5. Type
7B4 is used principally for renewal purposes.
NC
NC
65
========= Technical Data ========-N~
~c
~
---
Gz 3
:::
6 (i,1
P 2
7 K
G3
I
8
as
H
H
POWER PENTODE
Gla.. lock-in type used in output stage of
radio receivers. Outline lSB, OUTLINES SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 6.S; amperes, 0.4. Except for
interelectrode capacitances, this type is the
same electrically as glass-octal type 6K6-GT.
Type 7B5 is used principally for renewal
purposes.
785
TWIN DIODE-HIGH-MU TRIODE
Glass lock-in type used as combined detector, amplifier, and ave tube. Outline lSA,
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 6.S; amperes, O.S.
Except (or interelectrode capacitances, this
type is the same electrically as metal type
6SQ7. Type 7B6 is used principally for renewal
purposes.
G3
~
4
G2 3
5
IS
786
REMOTE-CUTOFF PENTODE
6 C,
Glass lock-in type used as rf or if amplifier
in radio receivers employing ave. Outline 13A,
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ae/de),6.3; amperes, 0.15.
2
7
P
K
Characteristics and maximum ratings as class
Al amplifier: plate volts, 250 (SOO max); gridI
8
H
H
No.2 volts, 100 max; grid-No.1 volts, -3 (posBS
itive-bias value, 0 max); grid N o.S and internal
shield connected to cathode at socket; plate rna., 8.5; grid-No.2 rna., 1.7; grid-No.2 input, 0.25 max
watt; plate dissipation, 2.25 max watts; plate resistance (approx.) 0.75 megohm; transconductance,
1750 I'mhos; peak heater-cathode volts, 90 max. Type 7B7 is used principally for renewal purposes.
___
'4
787
5g~
~
---
G23
P
:::
6 G4
2
7
I
H
8
BS
N~
G2
K
H
W
6
P 2
7
I
H
8
BS
H
788
BEAM POWER TUBE
~c
3
PENT AGRID CONVERTER
Glass lock-in type used as frequency converter in superheterodyne circuits. Outline lSA
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 6.3; amperes, O.S.
Except for interelectrode capacitances, this type
is the same electrically as metal type 6A8. Type
7B8 is used principally for renewal purposes.
G,
~3
Glass lock-in type used as output amplifier
in radio receivers. Outline 13B, OUTLINES
SECTION. Tube requires lock-in socket. Heater volts (ac/dc), 6.S; amperes, 0.45. Refer to
metal type 6V6 for maximum ratings and typical operation as class At amplifier and as pushpull class Al amplifier. Type 7C5 is used principally for renewal purposes.
7C5
TWIN DIODE-HIGH-MU TRIODE
Glas. lock-in type used as combined detector, amplifier, and ave tube. Outline lSA,
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 6.S; amperes, 0.15.
Characteristics and maximum ratings of triode
unit as class Al amplifier: plate volts, 250 (SOO
max); grid volts, -1 (positive-bias value,O max);
as
plate rna., loS; amplification factor, 100; plate
resistance (approx.), 0.1 megohm; transconductance, 1000 I'mhos; peak heater-cathode volts, 90 max.
For diode operation curves and triode application, refer to miniature type 6AV6. Type 7C6 is used
principally for renewal purposes.
7C6
359
RCA Receiving Tube Manual
SHARP·CUTOFF PENTODE
G3
~
..
5
IS
Glass lock-in type used as biased detector
G23
e CI
orrfamplifier. Outline lSA, OUTLINES SECTION. Tube requireo lock-in socket. Heater
volts (ac/dc), 6.3; amperes, 0.15. Characteristics
z
7
and maximum ratings as cia.. Al amplifier:
P
~
plate volts, 250 (300 max); grid-No.2 supply
I
8
volts, 300 max; grid-No.2 volts, 100 max; gridH
BS
H
No.1 volts, -3 (positive-bias value, 0 max); grid
No.3 and internal shield connected to cathode at socket; grid-No.2 input, 0.1 max watt; plate dissipation,l max watt; plate resistance (approx.), 2 megohms; plate ma., 2; grid-No.2 ma., 0.5; transconductance, 1300 !,mhos; peak heater-cathode volts, 90 max. This type is utled principally for renewal purposes.
7C7
TWIN DIODE-MEDIUM-MU TRIODE
Glass lock-in type used as combined detector, amplifier, and ave tube. Outline 13A,
7E6
OUTLINES SECTION. Tube requires lock-in
aocket. Heater volts (ac/dc), 6.3; amperes, 0.3.
For maximum ratings, typical operation, and
curves, refer to miniature type 6BF6. Type 7E6
is a DISCONTINUED type listed for reference
only.
TWIN DIODE-REMOTE·CUTOFF
PENTODE
'DI
~
4
5
PD2 3
G2p
8 Glp
Glass lock-in type used as combined detector, amplifier, and ave tube. Outline 13A,
OUTLINES SECTION. Tube requires lock-in
Pp Z
7 K
socket. Heater volts (ac/dc), 6.3; amperes, 0.3.
G3p
Characteristics and maximum ratings of pen8
I
tode unit as class Al amplifier: plate volts, 250
H
BS
H
(300 max); grid-No.2 supply volts, 300 max;
grid-No.2 volts, 100 max; grid-No.1 volts, -3
(positive-bias value, 0 max); plate dissipation, 2 max watts; grid-No.2 input, 0.3 max watt; cathodebias resistor, 330 ohms; plate resistance (approx.), 0.7 megohm; transconductance, 1300 !'mhos; plate
rna .. 7.5; grid-No.2 ma., 1.6; peak heater-cathode volts, 90 max. For diode curves, refer to type 6AV6.
Type 7E7 i. used principally for renewal purposes.
7E7
BEAM POWER TUBE
p~C!
5'"
Glass octal type used as vertical
3
:::
deflection amplifier in television reH 2
7 H
ceivers employing series-connected
8
Related Iype:
6EY6
heaterstrings.OutJine14E,OUTLINES
K
SECTION. Tube requires octal socket
G3
and may be operated in any position. Heater volts (ac/dc), 7.2; amperes, 0.6;
warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with glass octal type 6EY6.
7EY6
HIGH·MU TWIN TRIODE
7F7
360
Glass lock-in type used as phase inverter or
resistance-coupled amplifier. Outline 13A, OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/de), 6.3; ampereo, 0.3.
For maximum ratings, typical operation as class
Al amplifier, and curves, refer to glass-octal
type 6SL7-GT. Type 7F7 i. used principally
Cor renewal purposes.
BS
;;;;;;;;;;;=======- Technical Data --=======MEDIUM-MU TWIN TRIODE
Glasslock-in type used as amplifier or oscillator in radio equipment. Outline 13A, OUTLINES SECTION, except over-all length is
2-9/32 max inches and seated length is 1-3/4
inches. Tube requires lock-in socket. Heater
volts (ac/dc), 6.3; amperes, 0.3. Characteristics
and maximum ratings as class Al amplifier (each
as
unit): plate supply volts, 250 (300 max); grid
volts, p03itive-bias value, 0 max; plate dissipation, 3.5 max watts (both units, 3.5 max watts); cathode-
7F8
bias resistor, 500 ohms; plate rna., 6.0; transconductance, 3300
~mhos;
amplification factor, 48; peak
heater-cathode volt., 90 max. This type i. used principally for renewal purposes.
3
~
4
5 IS
SHARP-CUTOFF PENTODE
Glass lock-in type used in video amplifiers
of television receivers and in other applications
requiring high transconductance. Outline 13A,
OUTLINES SECTION. Tube requires lock-in
7 K
socket. Heater volts (ac/dc), 6.3; amperes,
p2
0-.45. Characteristics and maximum ratings as
I
8
class Al amplifier: plate volts, 250 (300 max);
H
BS H
grid-No.2supplyvolts,300max;grid-No.2:volts,
100 max; plate dissipation, 1.5 max watts; grid-No.2 input, 0.3 max watt; grid-No.1 volts, -2; grid
No;3 and internal shield connected to cathode at socket; plate resistance (approx.), 0.8 megohm; transconductance, 4500 "mhos; plate rna., 6; grid-N 0.2 rna., 2.0; peak heater-cathode volts, 90 max. This type
is used principally for renewal purposes.
G2
GI
3
__ ._
3
~
4
7G7
6
5
IS
SEMIREMOTE-CUTOFF PENTODE
Glass lock-in type used as rf or if amplifier
in radio receivers. Outline 13A, OUTLINES
SECTION. Tube requires lock-in socket.
Heater volts (ac/de), 6.3; amperes, 0.3. Char2
7
acteristicsand maximum ratings as class Ai amP
K
plifier: plate volts, 250 (300 max); grid-No.2
I
8
supply volts, 300 max; grid-No.2 volts, 150 (see
H
BS H
curve page 70); grid-No.1 volts, positive-bias
value, 0 max; plate dissipation, 2.5 max watts; grid-No.2 input for grid-No.2 voltages up to 150 volts,
0.5 max watt (for grid-No.2 voltages between 150 and 300 volts, see curve page 70); grid No.3 and internalshield connected to cathode at socket; cathode-bias resistor ,180 ohms; plate resistance (approx.).
0.8 megohm; transconductance, 4000 "mhos; plate rna., 10; grid-No.2 rna., 3.2; peak heater-cathode
volts, 90 max. This type is used principally for renewal purposes.
. 6 GI
G23
7H7
TRIODE-HEPTODE CONVERTER
Glass lock-in type used as combined oscillator and heptode mixer in radio receivers. Outline 13A, OUTLINES SECTION. Tube requires
lock-in socket. Heater volts (ac/dc), 6.3; amperes, 0.3. For maximum ratings and typical
operation, refer to glass-octal type 6J8-G. Type
7J7 is used principally for renewal purposes.
7J7
as
TWINDIODE-HIGH-MU TRIODE
Glasslock·in type used as FM detector and
audio amplifier in circuita which require diode
and triode units with separate cathodes. Outline
13A,OUTLINES SECTION. Tube requires lockin socket. Heater volts (ac/de), 6.3; amperes,
0.3. For ratings and typical operation, refer to
glass-octal type 6AQ7-GT. Type 7K7 is used
principally for renewal purposes.
7K7
361
RCA Receiving Tube Manltal
3
~
SHARP-CUTOFF PENTODE
4
5
1$
Glass lock-in type used as rf and if ampliGz
GI
3
6
fier inradioequipment.Outline 13A,OUTLINES
SECTION. Tube requires lock-in socket.
Heater volts (ac/dc), 6.3; amperes, 0.3. Typical
2
7
operation as cla[s Al amplifier: plate volts, 250
P
K
(300 max); grid-No.2 volts, 100; grid-No.1
I
8
volts, -1.5; grid No.3 tied to cathode at socket;
t<
as H
cathode-bias resistor, 250 ohms; plate rna., 4.5;
grid-No.2 rna., 1.5; plate resistance (approx.), 1 megohm; transconductance, 3100 "mhos. This is a
DISCONTINUED type listed for reference only.
7L7
MEDIUM-MU TWIN TRIODE
7N7
Glass lock-in type used as voltage amplifier
or phase inverter in radio equipment. Outline
13B,OUTLlNESSECTIONc.Tuberequireslockin socket. Heater volts (ae/de), 6.3; amperes,
0.6. For maximum ratings and typical operation
of each triode unit, refer to metal type 6J5. The
application of this type is similar t"- tbat of
glass-octal type 6SN7-GT. Type 7N7 is used
principally for renewal purposes.
PT2
BS
7Q7
Glass lock-in type used as converter in
superheterodyne circuits. Outline 13A, OUTLINES SECTION. Tube requires lock-in socket.
Heater volts (acidc), 6.3; amperes, 0.3. For
maximum ratings. typical operation in converter service, and curves, refer to metal type 6SA 7.
Type 7Q7 is used principally for renewal
purposes.
~
--G14
PENT AGRID CONVERTER
<02
G4 3
~G5
---
G3
6
c
P 2
7 K
e
I
Ii
&$
Ii
TWIN DIODEREMOTE-CUTOFF PENTODE
Glass lock-in type used as combined detector ,amplifier,and a vc tube. Outline 13A,O UTLINES SECTION. Tube requires lock-in socket.
Heater volts (acidc), 6.3; amperes, 0.3. Char7 K
acteristics and maximum ratings of pentode
G3p
unit as class Al amplifier: plate volts, 250 max;
IS
grid-N 0.2 supply volts, 250 max; grid-N 0.2 volts,
100 (see curve page70) ; grid-N 0.1 volts, -1 (posB5
itive-bias value, 0 max); plate dissipation, 2 max watts; grid-No.2 input (or grid-No.2 voltages up to
125, 0.25 max watt (for grid-N 0.2 voltages between 125 and 250 volts, see curve page 70); plate resistance (approx.), 1.0 megohm; transconductance, 3200 SLmhos; plate rna., 5.7; grid-No.2 rna., 2.1;
peak heater-cathode volts, 90 max. Refer to type 6A V6 for diode curves. Type 7R 7 is used principally
for renewal purpose8.
7R7
TRIODE-HEPTODE CONVERTER
Glass lock-in type used as combined triode
oscillator and heptode mixer in radio receivers.
Outline 13A, OUTLINES SECTION. Tube requires lock-in socket. Heater volts (acidc), 6.3;
p
amperes, 0.3. Typical operation of heptode unit:
plate volts, 250 (300 max); grids-N 0.2-and-N 0.4
volts, 100; grid-No.1 volts, -2; plate resistance,
1.25 megohms; conversion transconductance,
525 "mhos; plate rna., 1.8; grids-No.2-and-No.4 rna., 3.0. Typical operation of triode unit: plate supply
volts,250 (300 max) applied through a 20000-ohm dropping resistor bypassed by a 0.1-,,1 capacitor; grid
resistor,{iOOOO ohms; plate rna., 6.0; total cathodec rna. (both units),c10.2. This is a DISCONTINUED
type listed for reference only.
757
362
Technical Data
G34
~s
~
G2
GI
3
========---
SHARP-CUTOFF PENTODE
6
Glass lock-in type used as rf or if amplifier
inradioreceivers.Outline13A,OUTLINESSECTION. Tube requires lock-in socket. Heater
P 2
7 K
volts (ac/dc), 6.3; amperes, 0.45. Characteristics and maximum ratings as class Al amplifier:
I
8
plate and grid-No.2 supply volts, 300 max; gridH
H
No.2 series resistor, 40000 ohms; plate dissiBS
pation, 4 max watts; grid-N 0.2 input, 0.8 max
watt; grid No.3 connected to cathode at socket; cathode-bias resistor, 160 ohms; plate resistance (approx.), 0.3 megohm; transconductance, 5800 I'mhos; plate ma., 10; grid-No.2 ma., 3.9; peak heatercathode Yolts, 90 max. This type is used principally for renewal purposes.
7V7
SHARP-CUTOFF PENTODE
Glass lock-in type used as rl or if amplifier
inradioreceivers.Outline 13A.OUTLINESSECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 6.3; amperes, 0.45. This type is
the same as type 7V7 except for socket CODnections. Type 7W7 is used principally for
renewal purposes,
as
7W7
TWIN DIODE-HIGH-MU TRIODE
Glass lock-in type used as combined detector, amplifier, and ave tube in circuits which
require diodes with separate cathodes. Outline
13B.OUTLINESSECTION.Tuberequireslockin socket. Heater yolts (ac/dc), 6.3; amperes,
7X7
0.3. Characteristics and maximum ratings of
triode unit as class Al amplifier: plate Yolts,
250 (300 max); grid Yolts, -1; amplification factor,100; plate resistance (approx.), 67000 ohms;
transconductance, 1500 I'mhos; plate rna., 1.9; peak heater-cathode Yolts, 90 max. This type i. used
principally for renewal purposes.
BS
FULL-WAVE VACUUM RECTIFIER
Glass lock-in type used in power supply 01
automobile radio receivers and compact aeoperated receivers. Outline 13A, OUTLINES
SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 6.3; amperes, 0.5. Maximum
ratings; peak inverse plate volts, 1250; peak
plate rna. per plate, 18B; de output rna., 70;
peak heater-cathode volts, 450. For typical operation, refer to miniature type 6X4. Type 7Y 4
is used principally for renewal purposes.
NC
P02
~
NC
4
7Y4
FULL-WAVE VACUUM RECTIFIER
Glass lock-in type used in power supply of
automobile and ac-operated radio receivers.
Outline 13B, OUTLINES SECTION. Tube requires lock-in socket. Heater volts (ac/dc), 6.3;
2
7
amperes, 0.9. Maximum ratings: peak inverse
NC
K
plate volts, 1250; peak plate rna. per plate, 300;
I
8
de output rna., 100; peak heater-cathode volts,
H
H
450. Typical operation with capacitor-input fiIBS
ter: ac plate-to-plate supply volts (rrns), 650;
total effective plate-supply impedance per plate. 75 min ohms; de ol!tput rna., 100. T~pical operation with
choke-input filter: ac plate-ta-plate supply volts (rms), 900; filter-mput choke, 6 m~n hennesj de output
rna., 100. This type is used principally for renewal purposes.
3
5
POI
b
7Z4
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide variety of applications in television receivers employing series-connected
heater strings. The pentode unit is used
as a video amplifier, an if amplifier, or
8AU8
Related type:
6AU8A
363
RCA Receiving Tube Manual
======
an agc amplifier. The triode unit is used in sync-amplifier, sync-separator, syncclipper, and phase-inverter circuits. Outline SD, OUTLINES SECTION. Heater
volts (ac/dc), S.4; amperes, 0.45. Except for heater ratings, this type is identical
with type 6A US.
HIGH-MU TRIODESHARP-CUTOFF PENTODE
8AW8A
Miniature type used in a wide variety of applications in television receivers employing series-connected
heater strings. The pentode unit is
used as an amplifier and the triode
unit is used in low-frequency oscillator or sync circuits. Outline SD, OUTLINES
SECTION. Heater volts (acldc), S.4; amperes, 0.45; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with miniature type
6AWS-A.
Related type:
6AW8A
TWIN DIODEMEDIUM-MU TWIN TRIODE
8Bl0
Duodecar type used as combined
horizontal-deflection
oscillator and
Related type:
horizontal phase detector in television
6Bl0
receivers employing series-connected
H
H
heater strings. Outline 12A, OUTLINES SECTION. Heater volts (acldc), S.5; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with duodecar
type 6BI0.
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide variety of applications in color and blackRelated type:
and-white television receivers employ6BA8A
ing series-connected heater strings. The
pentode unit is used as a video amplifier, an age amplifier, or a reactance tube. The triode unit is used in low-frequency
oscillator and phase-splitter circuits. Outline 8D, OUTLINES SECTION. Tube
requires miniature nine-contact socket and may be operated in any position.
Heater volts (ac/dc), S.4; amperes, 0.45. Except for heater ratings, this type is
identical with miniature type 6BA8-A.
8BA8A
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
8BH8
Miniature type used in a wide variety of applications in television receivers employing series-connected
heater strings. The pentode unit is used
as an if amplifier, a video amplifier, or
an agc amplifier. The triode unit is used in low-frequency oscillator circuits. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 8.4; amperes, 0.45. Except
for heater ratings, this type is identical with type 6BHS.
Related type:
6BH8
364
========= Technical Data =========
TWIN DIODEHIGH-MU TRIODE
Miniature type used in a wide variety of applications in color and blackand-white television receivers employRelated type:
ingseries-connected heater strings. The
6BNI
triode unit is used in burst amplifier,
af amplifier, and low-frequency oscillator applications. The diode units are used in
phase-detector, ratio-detector or discriminator, and horizontal AFC discriminator
circuits. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 8.4; amperes,
0.45. Except for heater ratings, this type is identical with type 6BN8.
8 BN 8
POWER PENTODE
Miniature type used in the output
stage of audio-frequency amplifiers
employing series - connected heater
Related type:
strings Outline 8E, OUTLINES SEC6BQ5
TION. Heater volts (ac/dc), 8; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this type
is identical with type 6BQ5.
8 BQ 5
H
MEDIUM-MU TWIN TRIODE
Miniature type used as combined
vertical deflection and horizontal deflection oscillator in television receivRetated type:
ers employing series-connected heater
6CG7
strings. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 8.4; amperes, 0.45; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with miniature type 6CG7.
8CG7
H
MEDIUM-MU DUAL TRIODE
Miniature type used as combined
vertical oscillator and vertical defl~ction amplifier in television receivRetated type:
ers employing series-connected heater
6CM7
PT2
KT2
strings. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 8.4; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6CM7.
8CM7
H
TWIN DIODEHIGH-MU TRIODE
Miniature type used as combined
horizontal phase detector and reactance tube in television receivers
Related type:
employing series-connected heater
6CN7
strings. The triode unit is used in syncseparator, sync-amplifier, or audio-amplifier circuits. Outline 8B, OUTLINES
SECTION. Heater volts (ac/dc), 8.4 (series), 4.2 (parallel); amperes, 0.225 (series),
0.45 (parallel); warm-up time (average), 11 seconds (parallel). Except for heater
ratings, this type is identical with type 6CN7.
8CN7
365
RCA Receiving Tube Manual
======
H
MEDIUM-MU DUAL TRIODE
Miniature type used as combined
vertical-deflection oscillator and vertiRelated type:
cal-deflection amplifier in television re6C57
ceivers employing series-connected
heater strings. Outline8D,OUTLINES
SECTION. Heater volts (ac/dc), 8.4; amperes, 0.45; heater warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with type 6CS7.
8CS7
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in television
receivers employing series-connected
Related type:
heater strings. Pentode unit is used as
6CX8
video amplifier; triode unit is used in
sound if amplifier, sweep-oscillator,
sync-separator, sync-amplifier, and sync-clipper circuits. Outline 8D, OUTLINES
SECTION. Heater volts (ac/dc), 8; amperes, 0.6; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with type 6CX8.
8CX8
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in color and
black-and-white television receivers
Related type:
employmg series - connected heater
6EBI
strings. The pentode unit is used as a
video output amplifier; the triode unit
is used in sync-separator, sync-clipper, and phase-inverter circuits. Outline 8D,
OUTLINES SECTION. Heater volts (ac/dc), 8; amperes, 0.6; warm-up time
(average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6EB8.
8EB8
H
BEAM POWER TUBE
Miniature type used as vertical
deflection amplifier in television reRelated type:
ceivers utilizing picture tubes having
6EM'
diagonal deflection angles of 110 degrees and employing series-connected
G2
p
heater strings. Outline 8E, OUTLINES SECTION. Heater volts (acjdc), 8.4;
amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6EM5.
8 EMS
H
TWIN DIODESHARP-CUTOFF PENTODE
Miniature type used in television
receivers employing series-connected
heater strings. The pentode unit is
I
used as a video amplifier and the diodes KOI III 02
are used as a horizontal phase in- ISOI III 02
verter. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact
socket and may be operated in any position. Heater volts (ac/dc), 8; amperes, 0.6;
warm-up time (average), 11 seconds.
8El7
366
========= Technical Data =========
PENTODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ..................................•..............
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ............................ .
For grid-No.2 voltages between 165 and 330 volts .................. .
PLATE DISSIPATION .................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...................... .
Heater positive with respect to cathode ........................... .
330 max
volt.
330 max
volts
See curve page 70
o max
volts
1 . 1 max
watt.
See curve page 70
5 max
watts
200 max
2000 max
volt.
volts
200
150
volts
volts
volts
ohms
ohms
Characteristics:
Plate Supply Voltage. . . ....................... ...... ....
Grid-No.2 Supply Voltage.. ... ..... ....... ...............
Grid-No.1 Voltage ...... , ....... ............... ...... ....
Cathode-Bias Resistor .................................. .
Plate Resistance (Approx.) .............................. .
60
150
0
Transconductance ... , .................................. .
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-N 0.2 Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.1 Voltage (Approx.) for plate current of 100 I'a ..... .
55IS-
100
60000
11500
25
5.5
-10
~mho8
rna
rna
volts
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
O. 1 max
0.25 max
megohm
megohm
DIODE UNITS
Maximum Ratings, (Design-Maximum Values):
DC PLATE CURRENT ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
3 max
rna
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 1.5 rna..........................
10
volts
° The dc component must not exceed 100 volts.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
•
MEDIUM-MU TWIN TRIODE
Miniature type used as combined
vertical- and horizontal-deflection osR.lated typ.:
cillator in television receivers employ6FQ7
ing series-connected heater strings.
Outline 8D, OUTLINES SECTION.
Tube requires miniature nine-contact socket and may be operated in any position.
Heater volts (ac/dc), 8.4; amperes, 0.45. Except for heater ratings, the 8FQ7 is
identical with type 6FQ7.
8FQ7
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in color and
bla.ck-and-white television receivers
R.lated ty.....
employing series-connected heater
6GNa,looNa
strings. Triode unit is used in voltageKT
amplifier applications; pentode unit is
used in output stage of video amplifier. Outline8D, OUTLINES SECTION. Tube
requires' miniature nine-contact socket and may be operated in any position.
Heater volts (ae/dc), 8; amperes, 0.6; heater warm-up time (average), llseeonds.
Except for heater ratings, this type is identical with type 6GN8.
367
8GN8
====== RCA Receiving Tube Manual ======
HIGH-MU TRIODESHARP-CUTOFF PENTODE
H
Miniature type used in a wide
variety of applications in television reRelated type:
ceivers, particularly those having low6JV8
voltage "B" supplies and employing
series-connected heater strings. The
t<.T
Pp
triode unit is used in sound-if, keyed-agc, sync-separator, sync-amplifier, and noisesuppression circuits. The pentode unit is especially useful as a video amplifier tube.
Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 8.5; amperes, 0.45;
warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6JV8.
8JV8
HIGH-MU TRIODESHARP-CUTOFF PENTODE
H
Miniature type used in color and
black-and-white television receivers
Related type:
employing series-connected heater
6KA8
strings. The triode unit is used in syncseparator circuits; the pentode unit
PT
Pp
has two independent control grids and is used in gated-agc-amplifier and noiseinverter circuits. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 8.4;
amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6KA8.
8KA8
MEDIUM-MU TWIN TRIODE
Miniature type used as combined
vertical-deflection-amplifier and verRelated type.:
tical-deflection-oscillator in television
7AU7, 12AU7A
receivers employing series-connected
,
heater strings. Outline 8B,OUTLINES
PT2
SECTION. Heater volts (ac/dc), 9.4 (series), 4.7 (parallel); amperes, 0.225 (series), 0.45 (parallel); warm-up time (average), 11 seconds (parallel). Except for
heater ratings, this type is identical with type 12A U7-A.
9AU7
TWIN DIODE-HIGH-MU TRIODE
H
Miniature type used as combined sync
separator and horizontal phase detector in television receivers employing series-connected
heater strings. Outline BB, OUTLINES SECTION. Tube requires miniature nine-contact
socket. Heater volts (ac/de), 9.4 (series), 4.7
(parallel); amperes, 0.3 (series), 0.6 (parallel);
warm-up time (average), 11 seconds. Characteristics of triode unit as class AI amplifier:
plate supply volts, 250 (300 max); cathode-bias resistor, 200 ohms; amplification factor, 60; plate resistance (approx.)~ 10900 ohms; transconductance, 4000 pmhos; plate rna., 10; plate dissipation, 2.5
max watts. Maximum ratings of diode unit: peak inverse plate volts, 300 max; pE:'ak plate rna., 60 max.
Peak heater-cathode volts: heater negative with respect to ca,thode, 300 max; heater positive with respect to cathode, 200 max (the dc component must not ex('eed 100 volts). This type is used principally
for renewal purposes.
9BR7
H
MEDIUM-MU TRIODESHARP-CUTOFF TETRO DE
Miniature type used as combined
oscillator and mixer in vhf tuners of
television receivers employing seriesconnected heater strings. Outline 8B,
OUTLINES SECTION. Tube requires
G'TR
miniature nine-contact socket and may be mounted in any position. Heater volts
(ac/dc), 9.5; amperes, 0.3; warm-up time_(average), 11 seconds.
9CL8
368
========= Technical Data =========
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Cenler Values):
PLATE VOLTAGE ....................................... ..
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
GRID-No.2 INPUT:
For grid-N 0.2 voltages up to 150 volts ................ .
For grid-N 0.2 voltages between 150 and 300 volts ...... .
PLATE DISSIPATION ..................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
- The de component must not exceed 100 volts.
Triode Unit Tetrode Unit
300 max
300 max
volts
300 max
volts
Bee curve page 70
o max
0 max
volts
2.7 max
0.5max
watt
See curve page 70
2.8 max
watts
200 max
200-max
200 max
volts
volts
125
125
125
-1
volts
volts
volt
ohms
200~ax
Characteristics:
Plate Supply Voltage ................................... .
Grid-NO.2 Supply Voltsge ............................... .
Grid-N 0.1 Voltage ...................................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a ...... .
66
40
5000
8000
15
-9
100000
5800
12
4
-10
ohms
IAmhos
ma
rna
volt.
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
0.5 max
1 max
0 25 max
1 max
megohm
megohm
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
KP.C3p
IS
Miniature type used in television
receivers employing series-connected
heater strings. Tube is used as comRelated typel:
5U8,6U8A
bined oscillator and mixer tube in vhf
CT
tuners of television receivers utilizing
an intermediate frequency in the order of 40 megacycles per second. Outline 8B,
OUTLINES SECTION. Heater voltage (ac/dc), 9.45; amperes, 0.3, warm-up
time (average), 11 seconds. Except for heater ratings, this type is identical with
type 6U8-A.
9U8A
POWER TRIODE
~G
Glass type used as an audio-frequency amplifier. Outline 28, OUTLINES SECTION.
Tube requires four-contact socket. Filament
volts (ac/dc), 7.5; amperes, 1.25. Typical operation as class Al af power amplifier: plate volts,
425 max; grid volts, -40; peak af grid volts, 35;
plate rna., 18; plate resistance, 5000 ohms;
r
r
transconductance, 1600 #'mhos; load resistance,
10200 ohms; undistorted output watts. 1.6. This is a DISCONTINUED type listed for reference only.
10
~
H
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in diversified applications in television receivers employing seriesconnected heater strings. The pentode unit is
used as a general-purpose amplifier tube; the
triode unit is used in vertical-deflection-oscillator, sync-separator, sync-clipper, and syncamplifier circuits. Outline8B, OUTLINES SECTION. Tube requires miniature nine-contact
socket. Heater volts (ac Ide), 10.5; amperes, 0.3;
warm-up time (average), 11 seconds. Characteristics of triode unit as class At amplifier: plate supply
volts, 250 (300 max); cathode-bias resistor, 390 ohms; amplification factor, 53; plate resistance (ap-
10C8
369
RCA Receiving Tube Manual
======
prox.), 12000 ohms; transconductance, 4400 JLmhos; plate rna., 7.3. Pentode unit: plate and grid-No.2
supply volts, 135 (300 max); cathode-bias resistor, 100 ohms; plate resistance (approx.), 0.19 megohm;
transconductance, 8000 .umhos; plate rna., 11.5; grid-No.2 rna., 3.2. Maximum ratings as vertical-deflection oscillator (triode unit) and amplifier (pentode unit) for operation in a 525-line, 30-frame system:
plate volts, 300 max; peak positive-pulse plate volts (amplifier), 1000 max; peak negative-pulse gridNo.1 volts, -400 max (oscillator), -250 max (amplifier); peak cathode rna., 35 max (oscillator), 55 max
(amplifier); average cathode rna., 12 max (oscillator), 18 max (amplifier); plate dissipation, 1 max watt
(oscillator), 2.5 max watts (amplifier); peak heater-cathode volts, 200 max (the dc component must not
exceed 100 volts). This type is used principally for renewal purposes.
DUAL TRIODE
Miniature type used as combined
vertical oscillator and vertical deflection amplifier in television receivRelated types:
6DE7,13DE7
ers employing series-connected heater
strings. Unit No.1 is a medium-mu
PTz
KTZ
triode unit used as a blocking oscillator in vertical-deflection circuits, and unit No.2
is a low-mu triode unit used as a vertical-deflection amplifier. Outline SD, OUTLINES SECTION. Heater volts (ac/dc), 9.7; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with miniature
type 6DE7.
10DE7
DUAL TRIODE
Miniature type used as combined
vertical-deflection-oscillator and verRelated type:
tical-deflection-amplifier tube in tele6DR7,13DR7
vision receivers employing series-connected heater strings. Outline SD,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
operated in any position. Heater volts (ac/dc), 9.7; amperes, 0.6; warm-up time
(average), 11 seconds. Except for heater ratings, the 10DR7 is identical with type
6DR7.
10DR7
HIGH-MU TRIODESHARP-CUTOFF PENTODE
H
Miniature type used in televisionreceiver applications. The triode unit
Related type:
is used as a sync-separator, sync-am6DX8
plifier, keyed-agc, or noise-suppressor
tube. The pentode unit is used as a
video output tube. Outline SD, OUTLINES SECTION. Heater volts (ac/dc), 10.2;
amperes, 0.45. Except for heater ratings, this type is identical with miniature type
6DXS.
10DX8
DUAL TRIODE
Glass octal type used as combined
vertical-deflection oscillator and vertical-deflection- amplifier in television
receivers employing series-connected
heater strings. Outline 19, OUTLINES
SECTION. Tube requires octal socket and may be operated in any position. Heater
volts (ac/dc), 9.7; amperes, 0_.6; _warm-up time (average), 11 seconds. For maximum ratings _and characteristics, refer to type 6EW7.
10EG7
370
----------------=
Technical Data
=--------------=
DUAL TRIODE
Glass octal type containing highmu triode and high-perveance, low-mu
triode in same envelope. Used as comRelaled types:
6EM7,13EM7
bined vertical-deflection oscillator and
vertical-deflection amplifier in television receivers employing series-connected heater strings. Outline 14A, OUTLINES
SECTION. Heater volts (ac/dc), 9.7; amperes, 0.6; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with type 6EM7.
10EM7
H
~
DUAL TRIODE
Novar type containing high-mu
and high-perveance, low-mu triode
units used as combined vertical-deflecRelated types:
tion amplifier and vertical-deflection
6GF7, 13GF7
GTI
oscillator in television receivers employing series-connected heater strings. Outline lOA, OUTLINES SECTION.
Heater volts (ac/dc), 9.7; amperes, 0.6; warm-up time (average), 11 seconds.
Except for heater ratings, this type is identical with novar type 6GF7.
10GF7
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in color and
black-and-white television receivers
employing series-connected heater
Related types:
strings. The triode unit is used as a
6GN8, 8GN8
Pp
sync-separator, sync-clipper, phase-inverter, or sound-if-amplifier tube. The pent ode unit is used in the output stage of
video amplifiers. Outline SD, OUTLINES SECTION. Heater volts (ac/dc), 10.5;
amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6GNS.
1OGN 8
H
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in color and
black-and-white television receivers
employing series-connected heater
Related type:
strings. Triode unit is used in high-gain,
6HF8
KT
P
sound-if stages and in sync-separator,
sync-clipper, and phase-inverter circuits; pentode unit is used as video-output
amplifier. Outline SD, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be operated in any position. Heater volts (ac/dc), 10.5; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6HFS.
lOHF8
HIGH-MU TRIODESHARP-CUTOFF TETRODE
Miniature type used in color and
black-and-white television receivers
employing series-connected heater
strings. The triode unit is used as a
sync separator, sync clipper, and phase
inverter; the tetrode unit is used as a video amplifier. Outline SD, OUTLINES
lOJA8
371
======.RCA Receiving Tube Manual
SECTION. Tube requires miniature nine-contact socket and may be mounted in
any position. Heater volts (ac/dc), 10.5; amperes, 0.45; warm-up time (average), 11
seconds.
CLASS A, AMPLIFIER
Triode
Unit
300 max
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ............... .
GRID-No.2 VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ..................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ................ .
For grid-No.2 voltages between 165 and 330 volts ...... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode .............. .
Characteristics:
Pia te Voltage ...................... .
Grid-No.2 Voltage ................. .
Grid-No.1 Voltage ................. .
Amplification Factor ............... .
Plate Resistance ................... .
Transconductance .................. .
Plate Current ..................... .
Grid-N 0.2 Current ................. .
Grid-No.1 Voltage (Approx.) for
plate current of 10 p.a ........ .
Triode Unit
135
200
-2
60
23000
2600
2
-2
70
17000
4000
4
-4.8
-7
Tetrode
Unit
330 max
volts
330 max
volts
See curve page 70
o max
volts
5 max
watts
o max
1 max
1.5 max
watts
See curve page 70
200 max
200·max
30
135
0
32"
14"
200 max
200·max
volts
volts
Tetrode Unit
135
200
135
135
-1. 5
-1.5
volts
volts
volts
6600
12600
17
4.2
7000
14000
18
4
obms
.umhos
-5
-5
volts
rna
rna
Maximum Circuit Values:
Triode
Tetrode
Grid-No.1-Circuit Resistance:
Unit
Unit
For fixed-bias operation ............................. .
0.5 max
0.25 max megohm
For cathode-bias operation .......................... .
1 max
1 max megohm
• The de component must not exceed 100 volts.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
DETECTOR AMPLIFIER
11
Glass type used as detector and amplifier
in battery-operated receivers. Filament volts
(de), 1.1; amperes, 0.25. Typical operation as
class At amplifier: plate volts, 135 max; grid
volts, -10.5; plate resistance (approx.), 15500
ohms; transconductance, 440 ,umhos; plate rna.,
3. This is a DISCONTINUED type listed for
reference only.
p~
,
.~
G
SEMI REMOTE-CUTOFF
TWIN PENTODE
Duodecar type used as if-amplifier tube in television receivers employRelated type:
ing series-connected heater strings.
6ARlI
Outline 12A, OUTLINES SECTION.
Heater volts (ac/dc), 11.2; amperes,
It
H
0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is
identical with duo de car type 6AR11.
11 AR11
DUAL TRIODE
Miniature type used in television
receivers employing series-connected
heater-strings. Low-mu triode unit is
Related type:
6CYT
used as vertical-deflection amplifier;
high-mu triode unit is used as verticaldeflection oscillator. Outline 8D, OUTLINES SECTION. Heater volts (acl de),
11; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater rating,
this type is identical with miniature type 6CY7.
11CY7
372
Technical Data
=========
HIGH-MU TRIODESHARP-CUTOFF PENTODE
Miniature type with frame-grid
pentode unit used in black-and-white
television receivers. The triode unit is
Relaled type:
6Kva
used in general-purpose voltage-amplifier, sync-separator, and sound-ifamplifier applications. The pentode unit is used as a video output tube. Outline 8D,
OUTLINES SECTION. Heater volts (ac/dc), 10.9; amperes, 0.45; warm-up time
(average), 11 seconds. Except for heater ratings, this type is identical with miniature type 6KV8.
DETECTOR AMPLIFIER
llKV8
~G
r
~
F
Glass type used as detector and amplifier
in battery-operated receivers. Filament volts
(dc), 1.1; amperes, 0.25. Typical operation as
clasB At amplifier: plate volts, 135 max; grid
volts, -10.5; plate resistance (approx.), 15500
ohms; transconductance, 440 Jo'mhos; plate rna,
3. This is a DISCONTINUED type listed for
reference only.
12
POWER PENTODE
G lass type used as output amplifier in ac Ide
radio receivers. Maximum dimensions: over-all
length, 4-3/16 inches; seated height, 3-9/16
inches; diameter, 1-9/16 inches. Heater volts
(ac /dc), 12.6 (series), 6.3 (parallel); amperes,
0.3 (series), 0.6 (parallel). Typical operation as
class Al amplifier: plate volts and grid-No.2
volts, 180 max; grid-No.1 volts, -25; plate rna.,
H
45; grid-No.2 rna., 8; plate resistance, 35000
ohms; transconductance, 2400 I'mhos; load resistance, 3300 ohms; output watts, 3.4. This is a DISCONTINUED type listed for reference only.
12A5
RECTIFIER-POWER PENTODE
Glass type used as combined half-wave
rectifier and power amplifier. Outline 24B, OUTLINES SECTION. Tube requires small sevencontact (0.75-inch, pin-circle diameter) socket.
Heater volts (ac/dc), 12.6; amperes, 0.3. Typical operation of pentode unit as class Al amplifier: plate volts and grid-No.2 volts, 135 max;
H
grid-No.1 volts, -13.5; load resistance, 13500
ohms; plate resistance, 100000 ohms; transconductance, 975· p.mhos; cathode-bias resistor, 1175 ohms;
plate rna., 9; grid-No.2 rna., 2.5; output watts, 0.55. Maximum ratings of rectifier unit with capacitorinput filter: ac plate volts (rms), 125; de output rna., 30. This is a DISCONTINUED type listed
for reference only.
12A7
GJ
G~ 4
~-~'~
Be
PENT AGRID CONVERTER
Glass octal type used as converter in ac/dc
receivers. Outline 15A, OUTLINES SECTION.
Heater volts (acidc), 12.6; amperes, 0.111'. Except for heater rating, this type is identical with
glass octal type 6AS-GT. Type lZAS-GT is
used principally for renewal purposes.
12A8GT
K
BEAM POWER TUBE
Miniature type used in the output stage of automobile radio receivers
operating from a 12-volt storage battery. Outline 8D, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be mounted
in any position.
12AB5
373
RCA Receiving Tube Manual
HEATER-VOLTAGE RANGE (AC/DC)-................................... 10.0 to 15.9
volts
HEATER CURRENT (Approx.) at 12.6 volts. . . . . • . . . . . . . . . . . . . . . . . . . . . . .
0.2
ampere
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate. . . . . . . .... ............ ..............•........
0.7 max
pf
Grid No.1 to Cathode, Heater, Grirl No.2, and Grid No.3... .........
8
pf
Plate to Cathode, Heater, Grid No.2, and Grid No.3.................
8.5
pf
• Forlongest life, itis recommended that the heater be operated within the voltage range of 11 to 14 volts.
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................. .
PLATE DISSIPATION ................................................ .
GRID-No.2 INPUT ................................................. ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) .............................. .
Typical Operation with 12.6 Volts on Heater:
Plate Supply Voltage ............................... .
Grid-N 0.2 Supply Voltage ........................... .
Grid-No.1 (Control-Grid) Voltage .................... .
Cathode-Bias Resistor .............................. .
Peak AF Grid-No.1 Voltage ......................... .
Zero-Signal Plate Current ........................... .
Maximum-Signal Plate Current ...................... .
Zero-Signal Grid-No.2 Current ....................... .
Maximum-Signal Grid-No.2 Current .................. .
Plate Resistance (Approx.) .......................... .
Transconductance .................................. .
Load Resistance .................................... .
Total Harmonic Distortion .......................... .
Maximum-Signal Power Output ...................... .
max
max
max
max
volts
volt.
watts
watts
90 max
90 max
250 max
volts
volts
·C
315
285
12
2
250
200
250
250
-12.5
270
10.5
33.5
36
1.6
3.2
75000
4000
6000
8
3.3
12.5
45
47
4.5
7
50000
4100
5000
8
4.5
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ........................................ ..
For cathode-bias operation ...................................... .
0.1 max
0.5max
volts
volts
volt.
ohms
volts
rna
rna
ma
ma
ohm.
,umhos
ohms
per cent
watt.
megohm
megohm
PUSH-PULL CLASS ABI AMPLIFIER
Maximum Ratings: (Same as for single-tube class Al amplifier)
Typical Operation with 12.6 Volts on Heater (Values are for two tubes):
Plate Voltage ..........................•...........................
Grid-N 0.2 Voltage ................................................. .
Grirl-No.1 Voltage ................................................. .
Peak AF Grid-N o.l-to-Grid-N 0.1 Voltage ............................ .
Zero-Signal Plate Current. ......................................... .
Maximum-Signal Plate Current ..................................... .
Zero-Signal Grid-No.2 Current. . . . . . . .. . .. . ........................ .
Maximum-Signal Grid-No.2 Current ............•.....................
AVERAGE CHARACTERISTICS'
250
....
'"~
200
"j
0(
i
NI50
.~
.0
b
ii' 100
..,
'"0
"...
..5
p-
-- -
-) . -i.V:r.
'<\
-
,
~ ~~ ~,
TYPE 12ABS
£f'= 12.8 VOLTS
.1
1 ~RID-N!Z
L
30 ~
20
+5
~+~
____ !.c.L:~
GRIO-N!ll
.I
50
V
....
l
-10
-15
1>
--
'::.
100
F:
200
Ii
0
-5
f - - 12.5
-201
-.J
:~~C'=i'5
300
400
PLAT[ VOLTS
374
3i"
10 "':..
VOLTS Ec =0
V
!::!
250
250
-15
30
70
79
5
13
500
-10
VOLTS: 250 - -
volts
volt.
volts
volts
rna
ma
ma
ma
========= Technical Data =========
Effective Load Resistallce (Plate-to-platel ............................. .
Total Harmonic Distortion ......................................... .
Maximum-Signal Power Output ..................................... .
10000
5
10
ohm.
per cent
watta
Maximum Circuit Values:
Grid-N 0.1- Circuit Resistance:
For fixed-bias operation. . . .. . .................................. .
For cathode-bias operation ...................................... .
*
~;
o. 1 max
o. 5
max
megohm
megohm
REMOTE-CUTOFF PENTODE
Miniature type used as rf and if amplifier
in automobile receivers operating from a 12H 3
b G2
volt storage battery. Outline 7B, OUTLINES
SECTION. Tube requires miniature seven-contact socket. Heater-voltage range (ac /dc), 10 to
93 2
7 K
15.9; amperes at 12.6 volts, 0.15. Characteristics
IS
as class Al amplifier: heater volts, 12.6; plate
I
and grid-No.2 volts, 12.6 (30 max); grid No.3
GI
connected to cathode at socket; grid-N 0.1 volts,
0; grid-No.1 resistor (bypassed), 2.2 megohms; plate resistance (approx.), 0.5 megohm; transconductance, 730 ~mhos; plate rna., 0.55; grid-No.2 rna., 0.2; cathode rna., 20 max; peak heater-cathode volts,
30 max. This type is used principally for renewal purposes.
12AC6
PENT AGRID CONVERTER
Miniature type used as combined oscillator
and mixer in low B + voltage automobile radio
receivers operating directly from a 12-volt storage-battery system. Outline 7B, OUTLINES
SECTION. Tube requires miniature seven-contact socket. Heater-voltage range (ac/dc), 10 to
15.9; amperes at 12.6 volts, 0.15. Typical operation in converter service: heater volts, 12.6;
plate and grids-No.2-and-No.4 volts, 12.6 (16
max); grid-No.3 volts,O max; grid-No.1 volts (peak-to-peak), 4.5; grid-No.3 resistor, 2.2 megohms;
grid-No.1 resistor, 33000 ohms; plate resistance (approx.), 0.4 megohmj conversion transconductance,
320 "mhos; plate rna., 0.35; grids-No.2-and-No.4 ma., 1.5; grid-No.1 ma., 0.06; total cathode ma., 1.6
(20 max); peak heater-cathode volts, 16 max. This type is used principally for renewal purposes.
12AD6
TWIN DIODEMEDIUM-MU TRIODE
Miniature types used as combined detector
and af voltage amplifier in automobile radio receivers operating from a 12-volt storage battery. Outline 7B, OUTLINES SECTION.
Tubes require miniature seven-contact socket.
Heater-voltage range (ac /de), 10 to 15.9; amperes at 12.6 volts, 0.15. Characteristics of
triode unit as class Al amplifier: heater volts,
12.6; plate volts, 12.6 (30 m.ax); grid volts, 0;
plate resistance (approx.), 13000 ohms; amplification factor, 16.7; transconductance,1300 "mhos; plate
rna., 1; total cathode rna., 20 max. Maximum diode plate rna. (each unit), 1 max. Peak heater-cathode
volta, 30 max. Type 12AE6 is a DISCONTINUED type listed for reference only. Type 12AE6-A is
used principally for renewal purposes.
12AE6
12AE6A
DUAL TRIODE
Miniature type with medium-mu and lowmu triode units used as transistor-driver in
audio-output stage of hybrid car radios. Outline
8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket. Heater-voltage
range (ac/dc), 10 to 15.9; amperes at 12.6 volts,
0.45. Characteristics as class Al amplifier:
heater volts, 12.6; plate volts, 12.6; grid resistor,
1.5 megohms (unit No.1), 1 megohm (unit No.
2); amplification factor, 13 (unit No.1), 6.4 (unit No.2); plate resistance (approx.), 3150 ohms (unit No.
1),985 ohms (unit No.2); transconductance, 4000 "mhos (unit No.1),6500 "mhos (unit No.2); plate ma.,
1.9 (unit No.1), 7.5 (unit No.2). Maximum ratings as audio driver (each unit); plate volts, 16 max;
grid volts, 0 -max; plate dissipation, 1 max wattj peak heater-cathode volts, 16 max. This type is used
principally for renewal purposes.
12AE7
375
------------ RCA Receiving Tube Manual-----------HALF-WAVE VACUUM RECTIFIER
Miniature type used as a damper
IC
tube in horizontal-deflection circuits
of television receivers employing seIe
Related type:
ries-connected heater strings. Outline
6AF3
9B, OUTLINES SECTION. Heater
Ie
p
volts (ac/dc), 12.6; amperes, 0.6; warm-up time (average), 11 seconds. Except for
heater ratings, this type is identical with miniature type 6AF3.
12AF3
REMOTE-CUTOFF
PE~TODE
H4
:
Miniature type used as if and rf amplifier
in automobile radio receivers operating from a
H
"2
3
6
12-volt storage battery. Outline 7B, OUTLINES SECTION. Tube requires miniature
seven-contact socket. Heater-voltage range
"32
7 1\
(ac Idc), 10 to 15.9; amperes at 12.6 volts, 0.15.
Characteristics as class AI amplifier: heater
IS
I
volts, 12.6; plate and grid-No.2 volts, 12.6 (16
max); grid No.3 connected to cathode at socket;
grid-No.1 supply volts, 0 max; grid-No.1 resistor (bypassed), 2.2 megohms; plate resistance (approx.),
0.35 megohm; transconductance, 1500 I'mhos; plate rna., 1.1; grid-No.2 rna., 0.45; peak heater-cathode
volts, 16 max. This type is used principally for renewal purposes.
12AF6
~
"I
MEDIUM-MU TWIN TRIODE
12AH7GT
Glass octal tube used as audio amplifier in
radioequipment.Outline14B,OUTLINESSECTION, except over-all length is 3-1/16 max
inches and seated length is 2-1/2 inches. Tube
requires octal socket. Heater volts (ac/dc), 12.6;
amperes, 0.15. Characteristics and maximum
ratings (each unit) as class AI amplifier: plate
volts, 180 max; grid volts, -6.5; amplification
factor, 16; transconductance, 1900 I'mhos; plate
resistance (approx.), 8400 ohms; plate rna., 7.6.
This type is used principally for renewal purposes.
TWIN DIODEHIGH-MU TRIODE
Miniature type used as combined detector
and af voltage amplifier in automobile radio receivers operating from a 12-voltstorage battery.
Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contact socket. Heater..
voltage range (ac/dc), 10 to 15.9 volts; amperes
at 12.6 volts, 0.15. Characteristics with heater
volts of 12.6 and maximum ratings of triode
unit as class AI amplifier: plate volts, 12.6 (30
max); grid volts, 0; amplification factor, 55; plate resistance (approx.), 45000 ohms; transconductance,
1200 I'mhos; plate rna., 0.75; total cathode rna., 20 max; peak heater-cathode volts, 30 max. Maximum
rating of each diode unit: plate rna., 1 max. This type i. used principally for renewal purposes.
12AJ6
TWIN DIODE
12AL5
Related types:
3AL5,6AL5
376
Miniature, high-perveance type
used as detector in FM and television
circuits. It is especially useful as a
ratio detector in ac/dc FM receivers.
Outline 7A, OUTLINES SECTION.
Heater volts (ac/dc), 12.6; amperes,
0.15. Except for heater rating, this
. type is identical with miniature type
6AL5.
~
H4
H 3
6 IS
2
PDZ
~KD2
7
I
K I
POI
========- Technical Data ========H
MEDIUM-MU TRIODEPOWER TETRODE
Miniature type used in automobile-radio
receivers operating from a 12-volt storage battery. The triode unit performs the trigger funetion and the tetrode unit performs the relayactuating function in automatic station-seleetion circuits. Outline 80, OUTLINES SECTION. Tube requires miniature nine-contact
socket. Heater-voltage range (ac/dc), 10 to
15.9; amperes at 12.6 volts, 0.55. Characteristics
of triode unit as class AI amplifier: heater volts, 12.6; plate volts, 12.6 (80 max); grid volts (developed
across 2.2-megohm resistor), -0.9; amplification factor, 18; plate resistance (approx.); 18000 ohms;
transconductance, 1000 /Amhos; plate ma., 0.5; cathode rna., 20 max. Tetrode unit: heater volts, 12.6;
plate volts, 12.6 (80 max); grid-No.1 (space-charge-grid) volts, 12.6 (16 ab80lul. max); grid-No.2 (control.grid) volts, (developed across 2.2-megohm resistor), -0.5 (-20 max); amplification factor (grid No.2
to plate), 7.2; plate resistance (approx.), 480 ohms; transconductance (grid No.2 to plate) ,15000 /Amhos;
plate rna., 40; grid-No.1 rna., 75. Peak heater-cathode volts, 80 max. This type is used principally for
renewal purposes.
12AL8
Pp
BEAM POWER TUBESHARP-CUTOFF PENTODE
Duodecar type used as FM detector and audio-frequency output amplifier in television receivers employR.I.tedly....
ing series-connected heater strings.
6ALll
H
H
Outline 12B, OUTLINES SECTION.
Heater volts (ac/dc), 12.6; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with duodecar type 6AL1l.
12AL11
BEAM POWER TUBE
Miniature type used as output
amplifier primarily in automobile radio receivers operating from a 12-volt
Relatedly,...
storage battery. Outline 7C, OUT5AQ5.6AQ5A
c;,
LINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.225. Except for heater ratings, this type is identical with
miniature type 6AQ5. Within its maximum ratings, the performance of the 12AQ5
is equivalent to that of the larger type 12V6-GT.
12AQ 5
TWIN DIODEHIGH-MU TRIODE
Miniature type used as combined
detector, amplifier, and avc tube in
compact acldc radio receivers. Outline 7B,OUTLINES SECTION. Heater volts (ac/dc), 12.6; amperes, 0.15.
Except for heater ratings, this type is
identical with ~iniature type 6AT6.
12AT6
R.latedly....
6AT6
HIGH-MU TWIN TRIODE
Miniature type used as push-pull
cathode-drive amplifier or frequency
converter in the;,RM""3wLtelevision
broadcast bands. Outline "SR, OUTLINES SECTION. Tube requires
"miniature nine-contact socket and may be mounted in any position. Each triode
12AT7
377
RCA Receiving.Tube Manual
unit is independent of the other except for the common heater. For typical operation as a resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION.
HBATER ARRANGEMENT:
S.,ie.
HBATER VOLTAGE (AC/OO) .................................. .
12.6
HBATER CURRENT .•.•.....•...•.•.........•.•.•...•.•••....
0.15
DIRECT INTERELECTRODE CAPACITANCES:
Grid-Drive Operation:
Grid to Plate (Each unit) ....................................... .
Grid to Cathode and Heater (Each unit) .......................... .
Plate to Cathode and Heater:
Unit No.1. .................................................... .
UnitNo.2 ...................................................... .
Cathode-Drive Operation:
Cathode to Plate (Each unit) .................................... .
Cathode to Grid and Heater (Each unit) .......................... .
Plate to Grid and Heater (Each unit) ............................. .
Heater to Cathode (Each unit) ....................................... .
Parallel
6.S
O.S
volt.
ampere
1.5
2.2
pf
pf
0.5
0.4
pf
pf
0.2
4.6
1.8
2.4
pf
pf
pf
pf
CLASS AI AMPLIFIER (Each Unil)
Maximum Ralings, (Deaign-Center Valuea):
PLATE VOLTAGE ....•.......................•......•......•.•.......
GRID VOLTAGE, Negative-bias value ................................. .
PLATE DISSIPATION ...........•......•.....................•....••..
PBAK HEATER-CATHOPE VOLTAGE:
Heater negative with respect to cathode .•.•••••.•.•••.••...•..•.•.
Heater positive with respect to cathode ........................... .
SOO max
-50 ma.,
2.5 ma.,
volt.
volt.
watt.
90 ma.,
90 ma.,
volt.
volt.
Characteristics,
Plate Supply Voltage ..................................... .
Cathode-Bias Resistor .................................... .
Amplification Factor ..................................... ..
Plate Resistance (Approx.) .•.•...........•.............•..•
Transconductance ...........................•......•......
Grid Voltage (Approx.) for plate current of 10 "a ............. .
Plate Current .............•.............•......•...•......
100
270
60
15000
4000
-5
S.7
250
200
60
10900
5500
-12
10
volt.
ohm.
ohm.
"mho.
volts
rna
AVERAGE PLATE CHARACTERISTICS
TYPE
12AT7
1--1-- ~~~~:,~~~;~SR ARR"NG~MtNT --+--l--II--~-+---I--+--I
3'm--~--+--+--4-~~-~-+--4--~-~--+--+--4-~
o
I 0
200
300
400
PLATE VOLTS
500
800
e2CM-70S,T
SHARP.CUTOFF PENTODE
12AU6
Relat... types,
3AU6, 4AU6, 6AU6A
378
Miniature type used in compact
ac/dc radio equipment as an rf amplifier especially in high-frequency, wideband applications. Outline 7B, OUTLINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except
for heater ratings, this type is identical with miniature type 6AU6.
~
H4
H
G3
.S
3
:
6
2
7
I
GI
Gz
1\
========= Technical Data =========
MEDIUM-MU TWIN TRIODE
12AU7
Miniature types used as phase inverter or push-pull amplifier in ac/dc
Related types:
radio equipment and in diversified
7AU7,9AU7
applications such as multi vibrators or
PT2
HM
oscillators in industrial control devices. Also used as combined vertical oscillator and vertical deflection amplifier,
and as horizontal deflection oscillator, in television receivers. The 12AU7-A is also
useful in applications critical as to microphonics. Outline 8B, OUTLINES SECTION. Tubes require miniature nine-contact socket and may be mounted in any
position. Each triode unit is independent of the other except for the common
heater. For typical operation as a resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER SECTION. Type 12AU7 is a DISCONTINUED type listed for reference only.
12AU7A
HEATER ARRANGEMENT:
Series
HEATER VOLTAGE (AC/DC)................................
12.6
HEATER CURRENT. ....... . ... ... ....... .. . ...... ....... .
0.15
DIRECT INTERELECTRODE CAPACITANCES for 12AU7-A (Approx.): Unit No.1
Grid to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 5
Grid to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . . .
1. 6
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . .
0.5
Parallel
6.3
0.3
Unit No.~
1.5
1.6
0.35
volts
ampere
pi
pf
pi
CLA'SS Al AMPLIFIER (Each Unit Unless Otherwise Specified)
Maximum Ratings for 12AU7-A, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
PLATE DISSIPATION:
Each Plate .... , ............................................... .
Both Plates (Both units operating) ............................... .
CATHODE CURRENT .................................................•
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..... .
Heater positive with respect to cathode ........................... .
• The de component must not exceed 100 volts.
330 max
volts
2.75 max
5.5 max
22 max
watts
watts
200 max
200·max
volts
volts
rna
Characteristics for 12AU7 -A:
100
Plate Voltage .......................................... .
Grid Voltage .......................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current. .................................... .
Grid Voltage (Approx.) for plate current of 10 I'a ...... .
o
19.5
6250
3100
11.8
250
-8.5
17
7700
2200
10.5
-24
volts
volts
ohms
pmhos
rna
volts
AVERAGE: PLATE: CHARACTE:RISTICS
EACH UNIT
TYPt 12AU7-A
Ef'=12.6 VOLTS
3
5~t~~:A~~~~~~T
30
!
5
0
5
o
.,tl
~/ 'I
// / / 7. '
/ / /
/p
/ / / / / lJi:,-r
/ II VI ~ V~..
VJ
V V/ V/ V, ~ ~ t0~
L/.: ~ ~ ~ ~ ~ ~ ~82
/
100
200
'
300
400
PLATE VOLTS
,'Ii~
~
_,0
500
92CM-I054&T
379
RCA Receiving Tube Manual
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ..................................... .
0.25 max
1. 0 max
megohm
megohm
OSCILLATOR (Each Unit, Unless Otherwise Specified)
For operation in a 525-line, SO-frame system
VerticalDeflection
Oscillator
Maximum Ratings for 12AU7-A, (Design-Maximum Values):
330 max
DC PLATE VOLTAGE . • . . . . . . . . . . . • . . . . . • . . . . . . . . . . . • . . . . •
PEAK NEGATIVE-PULSE GRID VOLTAGE . . . . . . . . . . . . . . . . . . . . .
-440 max
PEAK CATHODE CURRENT . . . • . . . . . . . . . • . . . . . . . . . . . . . . . • . •
66 max
22 max
AVERAGE CATHODE CURRENT . . . . . . . . . . . . • . • . . . . . . . . . . . • • •
Horizonta!Deflection
Oscillator
330 max
-560 max
330 max
22 max
volts
volts
rna
rna
2.75 max
5.5 max
2.75 max
5.5 max
watts
watts
200 max
200·max
200 max
volts
volts
Z.2 max
2.2 max megohms
PLATE DISSIPATION:
Each Plate ........................................ .
Both Plates (Both units operating) ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
~OO·max
Maximum Circuit Value:
Grid-Circuit Resistance ................................. .
VERTICAL-DEFLECTION AMPLIFIER (Each Unit Unless Otherwise Specified)
For operation in a 525-Zine, SO-frame system
Maximum Ratings for 12AU7-A, (Design-Maximum Values):
DC PLATE VOLTAGE . . . . . • . • . . . • . • . . . • . • . . . • . . . • . . . • . . . . . . . . . . . . . . . . .
PEAK POSITIVE-PULSE PLATE VOLTAGE# . • . . . . . . . • . . • • . . . • . . . . . . . . . . . . .
PEAK NEGATIVE-PULSE GRID VOLTAGE ....•.•.•...••......•.•.•........
PEAK CATHODE CURRENT • . . • . . . . . . . . . . . . . . • . . . . . • • . • . • . . • • . . . • • . . . . .
AVERAGE CATHODE CURRENT . . . . . . . . . . . . . . • . • • . . . . • . . . • . . . . . • • • • . . . . .
PLATE DISSIPATION:
Each Plate .................................................... .
Both Plates (Both units operating) ............................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .......................... .
Heater positive with respect to cathode ........................... .
330 max
1200 max
-275 max
66 max
22 max
volts
volts
volts
rna
rna
2.75 max
5.5 max
watts
watts
200 max
200·ma.
volts
volts
Maximum Circuit Values.
Grid-Circuit Resistance:
For cathode-bias operation ....................................... .
2.2 max megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
• The dc component must not exceed 100 volts.
BEAM POWER TUBE
p
~
~3 3·
__ _
Glass octal type used as horizontal
deflection amplifierin television receivH 2
.
7 H
ers employing series-connected heater
Related types:
6AV5GA,25AV5GA
strings. Outline 19B, OUTLINES SECI
8
TION. Heater volts (ac/dc), 12.6; amG1
G2
peres, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this type
is identical with glass octal type 6AV5-GA.
12AV5GA
TWIN DIODEHIGH-MU TRIODE
Miniature type used as combined
detector, amplifier, and avc tube in
Related types:
automobile and ac-operated receivers.
3AV6, 4AV6, 6AV6
Outline 7B, OUTLINES SECTION.
Heater volts (ac/dc), 12.6; amperes,
0.15. Except for heater ratings, this type is identical with miniature type 6AV6.
12AV6
380
========= Technical Data =========
MEDIUM-MU TWIN TRIODE
Miniature type used as frequency converter
in vhf tuners of television receivers, and as rf
amplifier, oscillator, or mixer. Outline BB, OUT12AV7
LINES SECTION. Tube requires miniature
nine-contact socket. Heater volts (ac Ide), 12.6
(series), 6.3 (parallel); amperes, 0.225 (series),
0.45 (parallel). Characteristics as class Al amplifier (each unit): plate volts, 150 (300 max);
cathode-bias resistor, 56 ohms; amplification
factor, 41; plate resistance (approx.), 4800 ohms; transconductance, 8500 Jtmho8; plate rna., 18; plate
dissipation, 2.7 max watts; peak heater-cathode volts, 90 max. This type is used principally for renewal
purposes.
~
4
5 P
SHARP-CUTOFF PENTODE
Miniature type used as an rf or if
12AW6
amplifier up to 400 megacycles in comK 2
7 G3
pact ac/dc FM receivers. Outline 7B,
IS
OUTLINES SECTION. Tube reGi
quires miniature seven-contact socket.
Heater volts (ac/dc), 12.6; amperes, 0.15. Except for heater ratings and terminal
connections, this type is identical with miniature type 6AG5.
H 3
___
6 G2
HALF-WA VE VACUUM RECTIFIER
Duodecar type used as damper
tube in horizontal-deflection circuits
12AX3
of television receivers employing seriesRelated typel:
connected heater strings. Outline 12C,
6AX3,17AX3
H
OUTLINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.6; warm-up time (average), 11 seconds. Except for
heater ratings, this type is identical with duodecar type 6AX3.
$
HALF-WAVE VACUUM RECTIFIER
12AX4GT
Glass octal types used as damper
tubes in horizontal deflection circuits12AX4GTA
K 3
of television receivers. Types 12AX4GTA and 12AX4-GTB have a con-12AX4GTB
trolled heater warm-up time for use in
2
7
IC
H
series-cDnnected heater strings. OutRelated type.:
I
8
line 14C, OUTLINES SECTION.
6AX4GT,6AX4GTB,
IC
H
· d WI'th'
Th ese t ypes may b e supp1Ie
pm 17AX4GT,17AX4GTA,
25AX4GTA
No.1 omitted. Heater volts (ac/dc),
12.6; amperes, 0.6; warm-up time (average) for 12AX4-GTA and 12AX4-GTB, 11
seconds. Except for heater rating, these types are identical with glass octal type
6AX4-GT. Type 12AX4-GT is a DISCONTINUED type listed for reference only.
p
HIGH-MU TWIN TRIODE
Miniature types used as phase in12AX7
verter or twin resistance-coupled amplifier in radio equipment. The 12AX7
12AX7A
I
is also used in diversified applications
PT,
such as multivibrators or oscillators in
industrial control devices. Type 12AX7-A has controlled hum and noise characteristics and is used in high-fidelity audio-amplifier applications. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position. Each triode unit is independent of the other except for
381
RCA Receiving Tube Manual
common heater. For characteristics and curves, refer to type 6AV6. For typical
operation as a resistance-coupled amplifier, refer to RESISTANCE-COUPLED
AMPLIFIER SECTION.
HEATER ARRANGEMENT:
HEATER VOLTAGE (AC/DC) ................................ .
HEATER CURRENT ....................................... .
Series
12.6
0.15
Parallel
6.3
0.3
volt.
ampere
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate (Each unit) . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid to Cathode and Heater (Each unit) . . . . . . . . . . . . . • •
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . .
Unit No.1
1.7
1.6
0.46
UnitNo.!2
1.7
1.6
0.34
pf
pf
pf
CLASS Al AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Maximum Values:)
PLATE VOLTAGE ........................................................ .
PLATE DISSIPATION ..........................•...........................
GRID VOLTAGE:
Negative-bias value ................................................. .
Positive-bias value .................................................. .
330 max
1.2 max
volts
watts
-55 max
o max
volts
volts
200 max
200_max
volt.
volts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .....•...........................
Heater positive with respect to cathode ................................ .
-The de component must not exceed 100 volts.
Equivalent Noise and Hum Voltage, (Reference to Grid, Each Unit):"
Average Value. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 1. 8
"volts rms
• Measured in "true rmg" units under the following conditions: Heater voltage (parallel connection).
6.3 volts ac; center tap of heater transformer grounded; plate supply voltage, 250 volts de; plate load
resistor, 100000 ohms; cathode resistor, 2700 ohms bypassed by 100-"f capacitor; grid resistor, 0 ohms;
and amplifier covering frequency range between 25 and 10000 cps.
H
HALF-WAVE VACUUM RECTIFIER
Novar type used as damper tube
in horizontal-deflection circuits of
Related types:
black-and-white television receivers.
6AY3, 17AY3
Tube has controlled warm-up time for
use in series-connected heater strings.
Outline 17A, OUTLINES SECTION. Heater volts (ac/dc), 12.6; amperes, 0.6;
warm-up time (average), 11 seconds. Except for heater rating, this type is identical with novar type 6AY3.
12 AY 3
MEDIUM-MU TWIN TRIODE
Miniature type used in the first
stages of high-gain audio-frequency
amplifiers where reduction of microphonics, leakage noise, and hum are
I
primary considerations. Outline 8E,
PTZ
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position. Each triode unit is independent of the other except for the
common heater. Use of the 12.6-volt connection with an ac heater supply is not
recommended for applications involving low hum. For typical operation as a
resistance-coupled amplifier, refer to RESISTANCE-COUPLED AMPLIFIER
SECTION.
12AY7
HEATER ARRANGEMENT:
Series
HEATER VOLTAGE (AC/DC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.6
HEATER CURRENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.15
AMPLIFICATION FACTOR (Each unit)* ....................... .
PLATE RESISTANCE (Each unit, approx.)* .......................... .
TRANSCONDUCTANCE* ............................................... .
* For plate volts, 250; grid volts, -4; plate rna., 3.
Parallel
6.3
0.3
44
25000
1750
volts
ampere
ohms
limhos
CLASS Al AMPLIFIER (Each Unit)
Maximum Ratings (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE:
Negative bias value .............................................. .
Positive bias value. . . .. . ....................................... .
382
300 max
volts
-50 max
o max
volts
volts
========= Technical Data =========
PLATE DISSIPATION ................................................. .
CATHODE CURRENT ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode . ........................... .
1.5 max
10 max
watts
90 max
90 max
volts
volts
rna
HTI
5
HIGH-MU TWIN TRIODE
Miniature types used in direct12AZ7
coupled cathode-drive rf amplifier circuits of vhf television tuners. Outline
8B, OUTLINES SECTION. Tubes require miniature nine-contact socket
and may be mounted in any position. Heater volts (ac/dc) :12.6 (series) ,6.3 (parallel);
amperes, 0.225 (series), 0.45 (parallel); warm-up time (average), 12AZ7-A, 11 seconds. Type 12AZ7 is a DISCONTINUED type listed for reference only. For characteristics, class Al amplifier, refer to miniature type 12AT7.
12AZ7A
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate (Each unit) ........................... .
Grid to Cathode and Heater (Each unit) .............. .
Plate to Cathode and Heater:
Unit No.1. ........................................ .
Unit No.2 ......................................... .
• With external shield connected to cathode of unit under test.
Without
External
Shield
2
2.6
With
External
Shield A
1.9
2.8
pi
pi
0.44
0.36
1.4
1.6
pi
pi
CLASS Al AMPLIFIER (Each Unit)
UAZ7
Maximum Ratings:
PLATE VOLTAGE ........................................ .
GRID VOLTAGE, Negative-bias value ...................... .
PLATE DISSIPATION ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOI,TAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
° The dc component must not exceed 100 volts.
12AZ7-A
Design-Center Design-MaxiValue.
mum Values
300 max
330 max
-50 max
-55 max
2.5 max
2.5 max
200 max
2000 max
volts
volts
watts
volts
volts
Maximum Circuit Values (Each Unit):
Grid-Circuit Resistance:
For fixed-bias operation . ........................................ .
For cathode-bias operation ....................................•..
0.25 max
1 max
megohm
megohm
LOW-MU TRIODE
Miniature type having high perveance used as vertical deflection amplifier in television receivers. This type
has a controlled heater warm-up time
for use in series-connected heater
strings. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact
socket and may be mounted in any position. Heater volts (ac/dc), 12.6 (series),
6.3 (parallel); amperes, 0.3 (series), 0.6 (parallel) ;warm-uptime(average),llseconds.
12B4A
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Value.):
PLATE VOLTAGE ............... " ..... " ............................ .
GRID VOLTAGE, Negative-bias value .......................•...........
PLATE DISSIPATION ................................... , " .........• , .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
550 max
-50 max
5.5 max
volts
volts
watts
200 max
2000 max
volts
volts
Characteristics:
Pia te Voltage ...................................................... .
Grid Voltage ....................................................... .
Amplification Factor ..........................................•......
Plate Resistance (Approx.) ....•......................................
150
-17.5
volts
volts
1030
ohms
6.5
383
RCA Receiving Tube Manual
Transconductance ....................................•..............
Plate Current ...................................................... .
Grid Voltage (Approx.) for plate current of 200 "a ........•... " ........•
Plate Current for grid voltage of -23 volts ............. " ..... " ....... .
6300
34
-32
9.6
IImhos
rna
volt.
ma
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ....•...................................
0.47 max
2.2 max
megohm
megohms
550 max
1000tmax
-250 max
105 max
30 max
5.5 max
volts
volts
volts
rna
rna
watts
200 max
volts
volts
VERTICAL DEFLECTION AMPLIFIER
For operation in a 51l5-line, SO-frame Bystem
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE . . • • . • . . . . • . • . . . . • • . . . . . . • . . . . . . . . . . . . . . . . . • • . . . .
PEAK POSITIVE-PULSE PLATE VOLTAGE# (Abso/ule Maximum) . .......... .
PEAK NEGATIVE-PULSE GRID VOLTAGE •....•...••••..•.•.•..•.....•••..
PEAK CATIIODE CURRENT. . . . . . . . . . .
. ................•............
AVERAGE CATIIODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION .•.•..•...••.•.•••••..•...••.•...•.••.•..•..•...••
PEAK HEATER-CATIIODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
2000 max
Maximum Circuit Value:
Grid-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max megohms
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
t Under no circumstances should this absolute value be exceeded.
o The dc component must not exceed 100 volts.
TRIODE-PENTODE
Glass octal type used as combined detector
and rf or if amplifier in ac/dc receivers. Heater
volts (ac/dc) ,12.6; amperes, 0.3. Characteristics
of triode unit: plate volts, 90; grid volts, 0;
amplification factor, 90; plate resistance, 37000
ohms; transconductance, 2400 IImhos; plate
H
rna., 2.8. Characteristics of pentode unit: plate
volts, 90; grid-No.2 volts, 90; grid-No.1 volts,
3; plate resistance, 200000 ohms; transconductance, 1800 J.'mhos; plate rna., 7: grid-No.2 rna., 2. This is
a DISCONTINUED type listed for reference only.
12B8GT
REMOTE·CUTOFF PENTODE
H~H4
_--_=:
6 Gz
Miniature type used as rf amplifier in ac/dc standard broadcast re--7 K
ceivers, in FM receivers, and in other G3 2
Related types:
wide-band, high-frequency applicaIS
I
3BA6.6BA6
tions. Outline 7B, OUTLINES SECG,
TION. Heater volts (ac/dc), 12.6; amperes, 0.15. Except for heater ratings, this
type is identical with miniature type 6BA6.
12BA6
PENT AGRID CONVERTER
12BA7
Related type:
6BA7
Miniature type used as converter in ac/dc
superheterodyne circuits especially those for the
FM broadcast band. Outline 8D, OUTLINES
SECTION. Heater volts (ae/dc), 12.6; amperes, 0.15. Except for heater rating, this type
is identical with miniature type 6BA 7. Type
12BA7 is used principally for renewal purposes.
:
REMOTE·CUTOFF PENTODE
12B06
Related type:
6806
384
Miniature type used as rC or if amplifier in
radio receivers. Outline 7B, OUTLINES SECTION. Heater volts (ac/dc), 12.6; amperes,
0.t5. Except for heater rating, this type is
identical with miniature type 6BD6. Type
12BD6 is used principally for renewal purposes.
H
:
~
G3
IS
3
6
2
7
,
G,
Gz
K
========-Technical Data
========-
PENT AGRID CONVERTER
m
~
4
H 3
sP
___
K 2
G!>
6 (;2
G4
7 G
3
I
(;1
Miniature type used as converter
in ac/dc receivers for both standard·
broadcast and FM bands. Outline 7B,
OUTLINES SECTION. Heater volts
(acjdc), 12.6; amperes, 0.15. Except
for heater ratings, this type is identical
with miniature type 6BE6.
12BE6
Related ty.... :
38E6,68E6
TWIN DIODEMEDIUM-MU TRIODE
Miniature type used as combined
detector, amplifier, and avc tube
Related type:
primarily in automobile radio receiv61F6
ers operating from a 12-volt storage
battery. Outline 7B, OUTLINES SECTION. Heater volts (ac/dc), 12.6; amperes, 0.15. Except for heater ratings, this
type is identical with miniature type 6BF6.
12BF6
MEDIUM-MU TWIN TRIODE
Miniature types used as combined
12BH7
vertical deflection amplifiers and vertical oscillators, and as horizontal de1
flection oscillators, in television receivPT2
HM
ers. Type 12BH7-A has a controlled
heater warm-up time for use in series-connected heater strings. These types are also
used in other applications including phase-inverter circuits and multivibrator circuits. Outline 8D, OUTLINES SECTION. Tubes require miniature nine-contact
socket and may be mounted in any position. Each triode unit is independent of the
other except for the common heater. Type 12BH7 is a DISCONTINUED type
listed for reference only.
12BH7A
HEATER ARRANGEMENT:
HEATER VOLTAGE (AC/DC) .......•.....•.... " ....•.. " ..
HEATER CURRENT ...................................•.•
HEATER WARM-UP TIME (Average) for 12BH7-A ........... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid to Plate ...••........••.•...•..................
Grid to Cathode and Heater ......................... .
Plate to Cathode and Heater ........................ .
Plate of Unit No.1 to Plate of Unit No.2 .............. .
s.,u.
12.6
0.3
Unit No.1
2.6
3.2
0.5
Pa,allel
6.3
0.6
11
Unit No.S
2.6
3.2
0.4
0.8
volt.
ampere
second.
pf
pf
pf
pf
CLASS Al AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ..............•.•.•................•.........•.......
GRID VOLTAGE:
N egative-I>ias value ••............................................
Positive-bias value •.............................................•
CATHODE CURRENT ................................................ ..
PLATE DISSIPATION:
Each Plate ...............................................•......
Both Plates (Both units operating) ................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ...... '" .................. .
Heater positive with respect to cathode .•••......................••.
• The dc component must not exceed 100 volts.
300 mao:
volta
-50 mao:
o mao:
20 maz
volta
volta
3.5 maz
7 mao:
watts
watta
200 maz
200_ao:
volta
volta
m.
Characteristics:
Plate Voltage ....•.....•.....•..•.......•.....•......•.•••.......•.•
Grid Voltage ..................................................... ..
250
-10.5
volts
volta
385
RCA Receiving Tube Manual
Amplification Factor .....•...................................•.......
Plate Resistance (Approx.) .•...............•.........................
Transconductance ..................................................•
Grid Voltage (Approx.) for plate current of 50 "a ....................... .
Plate Current ...................................................... .
Plate Current for grid voltage of -14 volts ............................. .
16.5
5300
3100
-23
11.5
ohms
"mhos
volt.
ma
ma
4
Maximum <:ircuit Values:
Grid-Circuit Resistance:
For fixed-bias operation .......................................... .
For cathode-bias operation ..•.....................................
0.25 max
1.0 max
OSCILLATOR (Each Unit)
For operation in a 525-line, 80-!rame sllBtem
Vertical
Deflection
Maximum' Ratings, (Design-Center Values):
Oscillator
DC PLATE VOLTAGE .••••••.•.•.••••••.•••..••...••.•••
450 max
PEAK NEGATIVE-PULSE GRID VOLTAGE ••..•• " ......••...
-400 max
PEAK CATHODE CURRENT .••.•••••••.•..••.•............
70 max
AVERAGE CATHODE CURRENT ......•...•....•.......•.••
20 max
Horizontal
Deflection
Oscillator
450 max
-600 max
300 max
20 max
volts
volts
ma
ma
3.5 max
7 max
3.5 max
7 max
watts
watts
200 max
2000 max
200 max
2000 max
volts
volts
2.2 max
2.2 max
megohms
450 max
-250 max
70 max
20 max
volts
volts
volts
rna
rna
3.5 max
7 max
watts
watts
200 max
2000 max
volt.
volt.
megohm
megohm
PLATE DISSIPATION:
Each Plate ........................................ .
Both Plates (Both units operating) ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater.negative with respect to cathode .............. .
Heater positive with respect to cathode .............. .
Maximum Circuit Values:
Grid-Circuit Resistance ..•..............•..............
VERTICAL DEFLECTION AMPLIFIER (Each Unit)
For operation in a 525-line, 80-!rame sllstem
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ••••••••••..••.•••••••..........•.•.••••••.•• " ••
PEAK POSITIVE-PULSE PLATE VOLTAGE# (Absolute maximum) .•• ..........
PEAK NEGATIVE-PULSE GRID VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK CATHODE CURRENT ...•.........••...••......•••••••••.....•••.
AVERAGE CATHODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION:
1500~ax
Each Plate .................................................... .
Both Plates (Both units operating) ............................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
Maximum. Circuit Value,
Grid-Circuit Resistance:
For cathode-bias operation........................................
2.2 max- megohm.
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds•
• Under no· circumstances should this absolute value be exceeded.
° The dc 3
receivers. Outline 7B, OUTLINES
31%6, 4.16, 6116
I
IS
SECTION. Tube requires miniature
<>1
seven-contact socket and may be
mounted in any position. Heater volts (acl dc), 12.6; amperes, 0.15. Except for
heater ratings, this type is identical with miniature type 6BZ6.
H 3
:::
6 <>2
---
HIGH-MU TWIN TRIODE
Miniature type used in sync-separator and sync-amplifier circuits of
television receivers. This tube is also
PT I
used in clipping circuits and in general2
purpose audio amplifier applications.
Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket
and may be mounted in any position. Heater volts (ac/dc), 12.6 (series), 6.3 (parallel); amperes, 0.3 (series), 0.6 (parallel).
128Z7
CLASS A, AMPLIFIER (EatJh Unit)
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE •••••••••••.•••••••••••••.••••••.••••••••••••••••••••
GRID VOLTAGE:
Negative-hias value ....................................•.........•
Positive-hias value ............................................... .
PLATE DISSIPATION ...•....•••••.•••••••.•••••••••••.••••••••••••••••
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ............................. .
300 ma",
volts
-50 ma",
1.5 ma",
volts
volts
watts
180 ilia",
180 max
volts
volts
250
volts
volts
31800
3200
2.5
ohms
,.mhos
Oma",
Characteristics:
Plate Voltage ....................... " .•.•............•.....•..•.•
X::'~Ift;~~~~~· F;"~to~·.·.·:: : ::::::::::::::::::::::::::::::::::::::::::::
Plate Resistance (Approx.) ....•...............••...•.................•
Transconductance .........................•.•.....................•.•
Plate Current .......•.............••...•..••.••.............•..••...
-2
100
rna
389
RCA Receiving Tube Manual
Maximum Circuit Value:
Grid-Circuit Resistance:
For contact-potential-bias operation ..............................•..
12C5
5 max meeohm.1
Refer to type 12CU5j12C5
TWIN DIODESEMIREMOTE-CUTOFF PENTODE
12C8
Metal type used as combined de~ctor,
amplifier, and ave tube in ac/dc receivers. Outline 3, OUTLINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except for heater
ratings, this type is identical with metal type
6B8. Type 12C8 is used principally for renewal
purposes.
BEAM POWER TUBE
12CA5
Miniature type used in the audio output
stages of television receivers. This type has a
R.I..... lyp."
controlled heater warm-up time for use in seriesconnected heater strings. Outline 7C, OUT6CAS,2SCAS
LINES SECTION. Tube requires miniature
seven-contact socket. Heater volts (ac/dc),12.6;
amperes, 0.6; warm-up time (average), 11 seconds. Peak heater-cathode volts: heater negative with respect to cathode, 300 max (the dc component must not exceed 200 volts); heater poeitive
with respect to cathode, 200 max (the dc component must not exceed leO volts). Except for heater and
heater-cathode ratings, this type is identical with miniature type 6CA5.
REMOTE-CUTOFF PENTODE
Miniature type used as if amplifier in automobile radio receivers operating from a 12-volt
storage battery. Outline 7C, OUTLINES SECTION. Tube requires miniature seven-contact
socket. Heater-voltage range (ac/dc), 10 to 15.9;
amperes at 12.6 volts, 0.45. Characteristics as
class Al amplifier: heater volts, 12.6; plate and
grid-No.2 volts, 12.6 (16 max); grid-No.1 volts
o max; grid-No.1 resistor (bypassed), 2.2 megohms; plate resistance (approx.), 0.04 megohm; transconductance, 3800 I'mhos; plate rna., 4.5; gridNo.2 rna., 3.5; peak heater-cathode volts, 16 max. This type is used principally for renewal purposes.
12CN5
~
---
4
sPp
DIODEREMOTE-CUTOFF PENTODE
H 3
:::
6 G2p
Miniature type used as combined
detector and audio amplifier in auto2
7 .
GIl'
mobile and ac-operated radio receiv- Po
I
ers. The diode unit is used as an AM
K
detector, and the pentode unit as an
G3p
automatic-volume-controlled audio amplifier. Outline 7B, OUTLINES SECTION.
Heater volts (acjdc), 12.6; amperes, 0.15. Except for heater ratings, this type is
identical with miniature type 6CR6.
12CR6
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
12CT8
390
Miniature type used in television receivers
employing series-connected heater strings. Pentode unit is used as video amplifier; triode unit
is used in sweep-oscillator sync-amplifier, syncseparator, and sync-clipper circuits. Outline 8D,
OUTLINES SECTION. Tube requires miniature nine-contact socket. Heater volts (ac/dc),
12.6; amperes, 0.3; warm-up time (average), 11
seconds. Characteristics of triode unit as class
========= Technical Data =========
AI amplifier: plate supply volts, 150 (300 max); cathode-bias resistor, 150 ohms; amplification [actor,
40; plate resistance (approx.), 8200 ohms; transconductance, 4900 I'mhos; plate rna., 9; plate dissipation, 2.5 max watts. Pentode unit: plate supply volts, 200 (3CO max); grid-No.2 supply volt., 125 (300
max); cathode-bias resistor, 82 ohms; plate resistance (approx.), 0.15 megohm j transc(Jnductance, 7000
I'mhos; plate rna., 15; grid-No.2 rna., 3.4; plate dissipation, 2.75 max watts; grid-No.2 input, 0.9 max
watt. Peak heater-cathode volts, 200 max (the dc component must not exceed 100 volts when heater is
positive with respect to cathode). This type is used principally for renewal purposes.
BEAM POWER TUBE
Miniature type used in the audio
output stage of television receivers employing series-connected heater strings.
Related types:
Outline 7C, OUTLINES SECTION.
6CU5, 17CU5
Heater volts (ac/dc), 12.6; amperes,
0.6; warm-up time (average), 11 seconds. Except for heater rating, this type is
identical with miniature type 6CU5.
12CU5
/12C5
Refer to type 12BQ6-GBT /12CU6
*
4
12CU6.
REMOTE-CUTOFF PENTODE
~p
Miniature type used as rf amplifier in low
B+ voltage automobile radio receivers operating directly from 12-volt storage-battery systems.Outline7B,OUTLINES SECTION, Tube
requiresminiatureseven-contactsocket. HeaterC32
7 K
voltage range (ac/dc), 10 to 15,9; amperes at
I
12,6 volts, 0,15, Characteristics as class AI amCI
plifier: heater volts, 12,6; plate and grid-No,2
volts, 12,6 (33 max); grid N 0,3 connected to
cathode at socket; grid-N 0,1 volts, 0 max; grid-N 0,1 resistor (bypassed), 2,2 megohms; plate resistance
(approx.), 0,04 megohm; transconductance, 3100 I'mhos; plate rna" 3; grid-No.2 rna" 1.4; peak heatercathode volts, 30 max. This type is used principally for renewal purposes.
H 3
:::
II C2
---
12CX6
p
~
HALF-WAVE VACUUM RECTIFIER·
Glass octal type used as damper
diode in horizontal-deflection circuits
IC 2
7 H
of television receivers employing seriesI
8
connected heater strings. Outline 14C,
IC
H
OUTLINES SECTION. Tube requires octal socket and may be mounted in any position. Socket terminals 1, 2, 4,
and 6 should not be used as tie points. This type may be supplied with pin 1 omitted. It is especially important that this tube, like other power-handling tubes, be
adequately ventilated. Heater volts (ac/dc), 12.6; amperes, 0.6; warm-up time
(average), 11 seconds.
K 3
12D4
DAMPER SERVICE
For operation in a 525-line, 30-frame Byotem
Maximum Ratings, (DeBign-Maximum ValueB):
PEAK INVERSE PLATE VOLTAGE# . . . . . . . , . , . , ... , . . . . . , .. , " " " ' , .... .
PEAK PLATE CURRENT.,."" .. , . , . , ' " " , .. , . , " " " " ' , . , . , ... ,.,"
DC PLATE CURRENT, . , , . . . . . , , . , , , . . . . . . , .... , ... , ..... , . , . , . , , .... ,
PLATE DISSIPATION, , ... , , , . , , . . . . . . . , . , ... , , , .... , , , . , .... , . , . , .... ,
PEAK HEATER-CATHODE VOLTAGE:
4400 max
900 max
155 max
5.5 max
volts
rna
rna.
watts
Heater negative with respect to cathode# ... , .. , ........... , ... , , , , , ,
4400'max
volts
Heater positive with respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
aOO·max
volts
# The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, aO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
, The dc component must not exceed 900 volts.
• The dc component must not exceed 100 volts.
391
RCA Receiving Tllbe Manllai
BEAM POWER TUBE
Miniature type used as verticaldeflection-amplifier tube· in television
receivers employing series-connected
heater strings. Outline 8D, OUTLINES SECTION, except all vertical
dimensions of this. type are 1/8 inch greater. Tube requires miniature nine-contact
socket and may be operated in any position. Heater volts (ac(dc), 12.6; amperes,
0.6; warm-up time (average), 11 seconds.
12D85
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values) :
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
300
150
1.25
10
ma",
ma",
rna",
ma",
volta
volta
watts
watta
volts
volt.
Typical Operation:
Plate Supply Voltage ............................................... .
Grid-No.2 Supply Voltage ........................................... .
Cathode-Bias Resistor .............................................. .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Plate Resistance (Approx.) .......................................... .
Tran.eonductance .................................................. .
Load Resistance ................................................... .
Total Harmonie Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
200
125
180
8.5
46
47
2.2
8.5
28000
8000
4000
10
3.8
volts
volts
ohm.
volta
ma
ma
ma
ma
ohm.
/'mhoB
ohms
per cent
watta
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bia. operation ...................................... .
0.1 rna", megohm
2.2 max megohms
VERTICAL-DEFLECTION AMPLIFIER
For operalion in a 5l15-lin., itO-frame sl/slem
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ............................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE (Absolule Ma",imum)" .. .......... .
DC GRID-No.2 (SCREEN-GRID) VOLTAGE .............................. .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............ .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
300 max
2000-max
150 rna",
-250 max
200 max
55 max
1.25 max
10 ma",
volts
volts
volts
volts
ma
rna
watts
watts
200 max
200-max
volts
volts
Maximum Circuit Values:
Grid-No.1-Circuit Re.istance:
0.1 max megohm
For fixed-bias operation ......................................... .
2.2 ma", megohm.
For cathode-bia. operation ..•....................................
- The de component must not exceed 100 volts.
" The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-framesystem,15 percent of one vertical scanning cycle is2.5 milliseconds.
• Under no circumstances should this absolute maximum value be exceeded.
DIODEREMOTE-CUTOFF PENTODE
Miniature type used in automobile radio
PD
receivers; pentode unit is used as rf or if amplifier. Outline 8B, OUTLINES SECTION.
Tube requires miniature nine-contact socket.
KO
Heater-voltage range (ae/dc), 10 to 15.9; amperes at 12.6 volts, 0.2. Characteristics of pentode unit a. cla.s Al amplifier: heater volts,
Kp
12.6; plate and grid-No.2 volts, 12.6 (30 max);
'grid No.3 connected to cathode at socket; grid-No.1 volts (developed across 2.2-megohm resistor),
-0.8; plate resistance (approx.), 0.3 megohm; transconductance, 1500 /'mhos; plate rna., 1.3; grid-No.2
ma., 0.5; cathode ma., 20 ma",; peak heater-cathode volts, 30 max. Maximum diode plate ma., 5; tube
voltage drop for plate current of 20 ma., 5 volts. This type is used principally for renewal purposes.
12DE8
392
----------------=
SHARP-CUTOFF PENTODE
p
~
--~
4
H 3
K
:::
6 G2
2
7
I
G3
IS
GI
Technical Data -----------------
Miniature type used as if-amplifier tube in television receivers. Outline7B,OUTLINESSECTION.Heater volts (ac/dc), 12.6; amperes, 0.15.
Except for heater ratings, this type
is identical with miniature type 6DK6.
12DK6
R.I..... typ...
3DK6,6DK6
TWIN DIODE - POWER TETRODE
Miniature type used as combined detector,
ave diode, and power amplifier in low B+voltage automobile radio receivers operating from
12-volt storage-battery systems. Outline SD,
OUTLINES SECTION. Tube requires miniaturenine-contact socket. Heater-vllltage range
(ac/dc), 10 to 15.9; amperes at 12.6 volts, 0.5.
Typical operation of tetrode unit as class At
amplifier: heater volts, 12.6; plate and gridNo.2 volts, 12.6 (30 ma.z); grid-No.1 resistor, 15 megohms; peak af grid-No.1 volts (from 0.2-megohm
signal source), 1.4; plate ma., 6 (zero-signal),2.5 (maximum-signal); load resistance, 3500 ohms; maximum-signal power output, 10 milliwatts; plate dissipation, 0.5 max watt; peak heater-cathode volts,
30 max. Diode characteristics (each unit); heater volts, 12.6; plate volts, 10; plate ma., 1. This type is
used principally for renewal purposes.
12DK7
TWIN DIODE-POWER TETRODE
Miniature type used as combined detector
and power amplifier driver in low B+ voltage
automobile radio receivers operating directly
from 12-volt storage-battery systems. Outline
SD, OUTLINES SECTION. Tube requires
miniature nine-contact socket. Heater-voltage
range (ac/dc), 10 to 15.9; amperes at 12.6 volts,
0.65. Typical operation of tetrode unit as audio
driver: heater volts, 12.6; plate volts, 12.6 (30
max); grid-No.2 (control-grid) volts (obtained by rectification through a 2.2-megohm resistor), -2
(-20 max); peak af grid-No.2 volts (obtained from O.l-megohm source), 2.5; grid-No.1 (space-chargegrid) volts, 12.6 (16 absalul. max); plate ma., 40 (zero-signal), S (maximum signal); grid-No.1 ma., 75;
load resistance, 800 ohms; maximum-signal power output, 40 milliwatts. Characteristics: plate, heater,
and grid-No.1 volts, 12.6; grid-No.2 volts, -0.5; plate resistance (approx.), 4S0 ohms; transconductance
(grid. No.2 to plate), 15000 "mhos; amplification factor (grid No.2 to plate), 7.2. Maximum diode plate
ma.(each unit), 5. Peak heater-cathode volts, 30 max. This type is used principally for renewal purposes.
12DL8
:
~
HALF-WAVE VACUUM RECTIFIER
Glass octal type used as damper
tube.in horizontal-deflection circuits of
Ie 2
a 7H
television receivers employing seriesReI..... typ.. ,
connected heater strings. Outline 14F,
6DM4,17DM4
H
OUTLINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater
rating, this type is identical with glass octal type 6DM4.
K 3
G!
~
p
s GI
12DM4
BEAM POWER TUBE
12DQ6A
12DQ6B
Glass octal types used as horizontal-deflection-amplifier tubes in teleH 2
7 H
vision receivers employing series-conI
a
nectedheaterstrings. Outline21, OUTRal.led types.
NC
.K
LINES SECTION. Heater volts
6DQ6A,6DQ6B,
G3
(ac/dc), 12.6; amperes, 0.6; warm-up
17DQ6A, 17DQ6B
time (average), 11 seconds. Except for heater ratings, these types are identical with
glass octal types 6DQ6-A and 6DQ6-B, respectively.
NC 3
___ =_=.
393
RCA Receiving Tllbe Manual
POWER PENTODE
H
Miniature type used as video-output-amplifier tube in television receivers employing
series-connected heater strings. Outline 8D,
OUTLINES SECTION. Tube requires miniature nine-contact socket. Heater volts (ac/dc),
12.6 (series), 6.3 (parallel); amperes, 0.3 (series),
0.6 (parallel); warm-up time (average), 11 seconds. Characteristics as class Al amplifier: plate
supply volts, 200 (330 max) ; grid- No.3 connected
to cathode at socket; grid-No.2 supply volts,
125 (330 max); cathode-bias resistor, 68 ohms; plate resistance (approx.), 53000 ohms; transconductance, 10500 umhos; plate rna., 26; grid-N 0.2 rna., 5.6; 'plate dissipation, 6.5 max watts; grid-No.2 input, 1.1 max watt; peak heater-cathode volts, 200 max (the de component must not exceed 100 volts
when heater is positive with respect to cathode). This type is used principally for renewal purposes.
12DQ7
TWIN DIODE-POWER TETRODE
H
Miniature types used as combined detectors and power-amplifier drivers in low B+voltage automobile radio receivers operating directly from12-volt storage-battery systems.Outline SD, OUTLINES SECTION. Tubes require, miniature nine-contact socket. Heater
voltage range (ac/dc), 10 to 15.9; amperes at
12.6 vol ts, 0.4. Maximum ratings of tetrode unit
as audio driver: plate and grid-No.2 (controlgrid) volts, 16 max; grid-No.1 (space-charge-grid) volts, -16 max; peak heater-cathode volts, 16 max.
Characteristics and typical operation with grid-No.2-resistor bias, refer to type 12DLS. Maximum
diode plate rna. (each unit), 5. Type 12DS7-A is a DISCONTINUED type listed for reference only.
Type 12DS7 is used principally for renewal purposes.
12057
12DS7A
H
BEAM POWER TUBE
Miniature type used as verticaldeflection-amplifier tube in television
Related type:
receivers employing series-connected
6DT5
heater strings. Outline8D, OUTLINES
SECTION. Heater volts Cae/de), 12.6;
Gz
amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with type 6DT5.
12015
HIGH-MU TWIN TRIODE
Miniature type used as push-pull
rf amplifier and as combined oscillator
and mixer in FM tuners. Also useful
Related type:
in a wide variety of applications in
6DTI
radio and television receivers ..Outline
8B, OUTLINES SECTION. Heater volts (ae/dc), 12.6; amperes, 0.15. Except for
heater ratings, interelectrode capacitances, and basing arrangement, this type is
identical with miniature type 12AT7. Except for heating ratings, type 12DT8 is
identical with miniature type 6DT8.
12018
TWIN-DIODE-POWER TETRODE
120U7
394
Miniature type used as combined detector,
ave, and power-amplifier driver in low B+voltage automobile radio receivers operating directly from12-volt storage-battery systems.Outline SB, OUTLINES SECTION. Tube requires
miniature nine-contact socket. Heater-voltage
range (ac/dc), 10 to 15.9; amperes at 12.6 volts,
0.25. Typical operation of tetrode unit as audio
driver: heater volts, 12.6; plate and grid-No.2
H
----------------- Technical Data ----------------volts, 12.6 (16 mao:); grid-No.1 voltsge obtained by rectification through 2.2-megohm l'tIIIiator; peak al
grid-No.1 volts, 2.2; load resistance, 2700 ohms; maximum....ignal power output,25 milliwatt&. M"';mum diode plate rna. (each unit), 1. Peak heater-cathode volts, 16 maz. This type js·uaed pciDcipally
for renewal purposes.
TWIN DIODE-POWER TETRODE
H
Miniature type used as combined detector
and powe.....mplifier driver in low B+ voltsge
G2TRautomobile radio receivers operating directly
from 12-volt storage-battery systems. Outline
8
SD, OUTLINES SECTION. Tube requires
KD &D miniature nine-eontact socket. Heater-voltage
9
2 range (ac Idc), 10 to 15.9; amperes at 12.6 volts,
"0,
0.375. Typical operation of tetrode unit as audio
driver: heater volts, 12.6; plate and grid-No.1
(space-eharge-grid) supply volts, 12.6 (16 mao:); grid-N 0.2 resistor, 4.7 megohms; cathode-bias resistor,.
IS ohms; peak af grid-No.2 supply volts (obtained from 0.3-megohm signal80urce), 1.2; plate resistance
(approx.), 900 ohms; transconductance (grid No.2 to plate), S500 I'mhos; amplification factor·(grid No.2
to plate), 7.6; indicated....ignal plate ma., 6.S; grid-No.1 ma., 54; load resistsnce,1250 ohms; indiea.tedsignal power output, 5 milliwatts. Maximum diode plate mao (eaeh unit), 5. Peak heater-eathode volts,
16 mao:. This type is used principally for renewal purposes.
Y,ff~--,=o;oN'7
12DV8
Is
DUAL TRIODE
12DW.7
Miniature type containing highmu and medium-mu triodes; used as
amplifier and phase inverter in audio
equipment. Outline 8B, OUTLINES
HM
SECTION. Tube requires miniature
nine-contact socket and may be operated in any position. Heater volts (ac/dc),
12.6 (series), 6.3 (parallel); amperes, 0.15 (series), 0.3 (parallel).
CLASS A, AMPLIFIER
Maximum Ratings, (Desilln-Mao:imum Values):
PLATE VOLTAGE •••••.•.•....•..•••••.•••••...•.........•
GRID VOLTAGE:
Unit No.1
330 mao:
UlIitNo.f4
330 mao:
Negative-bias value ................................. .
Positive-bias value ................................. .
55 mao:
o mao:
CATHODE CURRENT ••.•......••.••........•••.•..•.•.••.•
PLATE DISSIPATION .••..•.•.•..•..•..•.••.•.•.....••.••.•
PEAK HEATER-CATHODE VOLTAGE:
1.2 mao:
21.......,
3.3 mao:
Heater negative with respect to cathode ................ .
Heater positive with respect to cathode ............... .
200 mao:
200·mao:
200""""
200"......,
Characteristics:
UnilNo.1
Plate Voltsge .............................. .
100
250
-1
-2
Grid Voltage .............................. .
100
100
Amplification Factor ...............•.........
Plate Resistance (Approx.) .................. . SOOOO
62500
1250
1600
Transconductance .......................... .
Plate Current .............................. .
0.5
1.2
Grid Voltage (Approx.) for plate current of 10 I'a
¥Ciilts
volts
volta
UnitNo.$·
100
250'
-8:di
0
20
17
6500
7700
3100
2200·
11.S
10.a
-24
-DB.
"edts.
volts
¥lOtts
V 251111',.1OER5
heater strings. Outline7C, OUTLINES
SECTION. Heater volts (ac/dc),
G3
12.11:; ampel1es, 0.6; warm-up time (average), 11 seconds. Peak heater-cathode
voltage' Wihea: the heater is negative with respect to the cathode, 300 max. volts.
Ex-cept for' heater and heater-cathode ratings, this type is identical with miniature
type; SIlliS.
REMOTE-CUTOFF PENTODE
~H4
Miniature type used as if and rf amplifier
:
in low 8+ voltage .utomobile radio receivers
operating directly from 12-volt storage-battery
H 3
__ -_-_
II 10 2
systems. Outline 78, OUTLINES SECTION.
Tube requires miniature seven..contact socket.
--Heater-voltage range (ae/dc), 10 to 15.9; am103 2
7 K
peres at 12.6 volts, 0.19. Characteristics as class
IS'
A. amplifier: heater volta, 12.6; plate and gridI
No.2 volta, 12.6 (16 ma.:); grid No.3 connected
101
to.CId!iod.e.1Iitsneket;;grid-No.1supply volts, 0 maz; grid-No.1 resistor (bypassed), 2.2 megohms; plate
l!IIIIiioIIam!e: (.'PPr",,;); 0.05 megohm; transconductance, 4200 "mhos; plate ma., 4; grid-No.2 ma., 1.7;
peaIf:~de volta, 16 ma.:. This type is used principally for ren~wal purposes.
128(6
========= Technical Data
H4
~
TWIN-DIODE-HIGH-MU TRIODE
:02
Miniature type used as combined detector
and audio-amplifier tube in low B+ voltage
automobile-radio receivers operating directly
from 12-volt storage-battery systems. Outline
7B, OUTLINES SECTION. Tube requires
PT 2
7 K
miniature seven-contact socket. Heater-voltage
·1
range (ac Idc), 10 to 15.9; amperes at 12.6 volts,
Gr
0.15. Characteristics of triode unit as class AI
amplifier: heater volts, 12.6; plate volts, 12.6
(30 max); grid volts, 0; amplification factor, 55; plate resistance (approx.), 45000 ohms; transconductance, 1200 .umhos; plate rna., 0.75; cathode' rna., 20,max; peak heater-cathode volts, 30 max. Maximum
diode plate rna, (each unit), 1. This type is used principally for renewal purposes.
H 3
___
b POI
12EL6
DIODE-POWER TETRODE
Miniature type used as combined detector
and driver for transistorized power output stage
in low B+ voltage automobile-radio receivers
operating directly from 12-volt storage-battery
Ie systems. Outline SD, OUTLINES SECTION.
Heater voltage range (ae/de), 10.0 to 15.9;
amperes. (approx.) at 12.6 volts, 0.5. Characteristics for tetrode unit: plate resistance (approx.), 4000 ohms; transconductance, 5000
"mhos; plate and grid-No.2 volts, 12.6; grid-No.1 resistor (bypassed), 2.2 megohms; plate rna., 6;
grid-No.2 rna., 1. Maximum ratings, tetrode unit: plate and grid-No.2 volts, 30 max; plate dissipation,
0.5 max watts; peak heater-cathode volts, 30 max. Maximum ratings, tetrode unit: plate rna., 10 max.
Tube requires miniature nine-contact socket and may be operated in any position. Type 12EM6 is a
DISCONTINUED type listed for reference only.
Ie
~
G2
4
1:1
'12EM6
BEAM POWER TUBE
$
Glass octal type used as vertical-detlectionamplifier tube in television receivers employing
P3
series-connected heater strings. Outline 14C,
OUTLINES SECTION. Tube requires octal
socket. This tube may be supplied with pin
2
7
No.1 omitted. Heater volts (ac Idc), 12.6; am"
H
18K
peres, 0.6; warm-up time (average), 11 seconds.
NC
G3
Characteristics as class AI amplifier: plate volts,
200; grid-No.2 volts, 110; grid-No.1 volts, -9.5;
plate resistance (approx.), 28000 ohms; transconductance, 8000 }lmhos., Maximum ratings as vertical
deflection amplifier (for operation in a 525-line, 30-frame system): de plate volts, 300 max; peak positivepulse plate volts, 1200 max; dc grid-No.2 volts, 150 max; peak negative-pulse grid-No.1 volts, -250 max;
cathode rna., 175 (peak), 50 (average); plate dissipation, 7 max watts; grid-No.2 input,1.25 max watts;
peak heater"cathode volts: heater negative with respect to cathode, 300 max (the dc component must
not exceed 200 volts), heater positive with respect to cathode, 200 max (the de component must not exceed 100 volts). This type is used principally for renewal purposes.
12EN6
DIODEREMOTE-CUTOFF PENTODE
K
Miniature type used as combined
if amplifier and AM detector in AM
and AM/FM radio receivers. Outline
Rel.led Iypel:
6EQT,20EQ7
8D, OUTLINES SECTION. Tube reG3p
quires miniature nine-contact socket
and may be operated in any position. Heater volts (ac/dc), 12.6; amperes, 0.15.
Except for heater ratings, this type is identical with miniature type 6EQ7.
12EQ7
399
RCA Receiving Tllbe Manual
HIGH-MU TRIODE
12F5GT
Related type:
6F5GT
Ne
~
,.
Glass octal type used in resistance-coupled
amplifier circuits of ae Ide receivers. Outline 15A,
OUTLINES SECTION. This type may be supplied with pin No.1 omitted. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except for heater
ratings, this type is identical with glass-octal
type 6F5-GT. Type 12F5-GT is a DISCONTINUE D type listed for reference only.
4
5
I
8
C
Ne 3
2
7
H
H
we;
1\
TWIN DIODEREMOTE-CUTOFF PENTODE
Miniature type used as combined detector
and af voltage amplifier in low B+ voltage
automobile radio receivers 'operating directly
from 12-volt storage-battery systems. Outline
8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket. Heater-voltage
range (ac Ide), 10 to 15,9; amperes at 12.6 volts,
0.15. Typical operation of pentode unit as class
AI amplifier: heater volts, 12.6; plate and gridNo.2 volts, 12.6 (30 max); grid No.3 connected to cathode at socket; grid-No.1 volts, 0 max; plate resistance (approx.), 0.33 megohm; transconductance, 1COO "mhos; plate ma., 1; grid-No.2 ma., 0.38; peak
heater-cathode Yolts, 30 max. Maximum diode plate rna. (each unit), 1. This type is used principally
for renewal purposes.
12F8
TWIN DIODE-LOW-MU TRIODE
Miniature type used as combined
detector and af amplifier in low B+
voltage automobile radio receivers operating directly from 12-volt storagebattery systems. Outline 7B, OUTLINES SECTION. Tube requires miniature seven~contact socket and may be
mounted in any position.
12FK6
HEATER-VOLTAGE RANGE (AC/IlC) •.................................. 10.0 to 15.9
volts
HEATER CURRENT (Approx.) at 12.6 volts. . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.15
ampere
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Triode Grid to Triode Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.6
pf
Triode Grid to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 8
pf
Triode Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.7
pf
Plate of Diode Unit No.1 to Plate of Diode Unit No.2.............
0.9
pf
• For longest life, it is recommended that the heater be operated within the voltage range of 11 to 14 volts.
AVERAGE CHARACTERISTICS
•
TRIODE UNIT
",'7
TYPE 12FK&
E,.= 12.& VOLTS
..0
!i'0
V
/
/V
2
/
V
V
/
/
V
/
/
,
V
:7
/'
);-
/ ' . / / ' . /V , / ./'. / ;;./
/ ' ~ /'" .-/" . / ~ ~ ~
./'
,/
,/
."
I
,/
400
/
V
lY'
V
;Y
3
o
'0/
::::-
/
-::::::. :::::::
:::--
--
./
;::::::: ~ :::::::
12
-
II
PLATE VOLTS
--
20
,/
24
21
ezel/-170fT
========= Technical Data =========
TRIODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................. .
GRID VOLTAGE: .................................................. .
Positive-bias value ........................................... .
Negative-bias value .......................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......................... .
Heater positive with respect to cathode ......................... .
16 max
volts
o max
-16 max
volts
volts
16 max
16 max
volts
volts
Characteristics with 12.6 Volts on Heater:
Plate Voltage .................................................... .
Grid-Supply Voltage .............................................. .
Grid Resistor (Bypassed) .......................................... .
Plate Resistance (Approx.) ........................................ .
Transconductance ................................................ .
Amplification Factor .............................................. .
Plate Current .................................................... .
Grid Voltage (Approx.) for plate current of 10 p.a ..................... .
12.6
0
2.2
6200
1200
7.4
1.3
-4
volts
volts
megohm.
ohm.
~mho8
rna
volts
Maximum Circuit Value:
10 max megohms
Grid-Circuit Resistance ........................................... .
DIODE UNITS
Maximum Ratings, (Design-Center Values):
1 max
PLATE CURRENT (Each unit) ...................................... .
rna
TWIN DIODEMEDIUM-MU TRIODE
Miniature type used as combined detector
and af voltage amplifier in low B+ voltage
automobile radio receivers operating directly
from 12-volt storage-battery systems. Outline
7B, OUTLINES SECTION. Tube requires
miniature seven-contact socket. Heater-voltage
range (ac Ide), 10to 15.9; amperes at 12.6 volts,
0.15. Characteristics of triode unit as class AI
amplifier: heater volts, 12.6; plate volts, 12.6
(30 max); grid resistor (bypassed), 2.2 megohms; amplification factor, 10; plate resistance (approx.),
7700 ohms; transconductance, 1300 p.mhos; plate rna., 1; peak heater-cathode volts, 30 max. Maximum
diode plate rna. (each unit),!. This type is used principally for renewal purposes.
12FM6
HIGH-MU
TWIN DOUBLE-PLATE TRIODE
Miniature type used in frequencydivider and complex-wave-generator
circuits of electronic musical instruments. Outline 8B, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be mounted in any position. Heater volts (ac/dc), 12.6;
amperes, 0.15.
12FQ8
CLASS Al AMPLIFIER
Characteristics, (E""h Unit):·
Plate Voltage. . . . . . . . . . . . . . . .
. ......... .
Grid Voltage. . ..........
. ......... .
Amplification Factor. . . . .
. ........... .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Plate Current ................................................ .' ..... .
• Using either plate A or plate B, with plate not in use connected to ground.
250
-1.5
95
76000
1250
1.5
volts
volts
ohms
p.mhos
rna
FREQUENCY-DIVIDER AND COMPLEX-WAVE GENERATOR
E~h Unit
Maximum Ratings, (Design-Maximum Values):
PLATE A VOLTAGE .................................................. .
PLATE B VOLTAGE ............................................... " ..
GRID VOLTAGE, Positive-bias value ................................... .
PLATE A DISSIPATION ............................................... .
PLATE B DISSIPATION ..............................................••
330 max
330 max
o max
0.5 max
0.5 max
volts
volts
volts
watt
watt
401
RCA Receiving Til be Manllal
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........ .
o The de component must not exceed 100 volts.
200 max
2000 max
volts
volts
DIODEMEDIUM-MU TRIODEREMOTE-CUTOFF PENTODE
12FR8
Miniature type used as combined
if amplifier, af amplifier, and second
detector in low B+ voltage automobile
radio receivers operating directly from
12-volt storage-battery systems. Outline 8D, OUTLINES SECTION, except vertical dimensions are 3/16 inch shorter.
Tube requires miniature nine-contact socket and may be operated in any position.
Heater-voltage range (dc), 10 to 15.9; amperes at 12.6 volts, 0.32.
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ..... , ......... .
GRID-No.2 VOLTAGE .................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with' respect to cathode ............... .
Heater positive with respect to cathode ............... .
Triode
Unit
16 max
Pentode
Unit
16 max
16 max
16 max
16 max
16 max
volts
volts
volts
volts
volts
Characteristics. with 12.6 Volts on Heater:
Plate Voltage .......................................... .
Grid-No.2 Voltage ............................ , ......... .
Grid-No.1 Voltage· ..................................... .
Amplification Factor .................................... .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.)
for transconductance of 30 I'mhos .................... .
Grid Voltage (Approx.) for plate current of 10 I'a .......... .
• Developed across a 2.2-megohm grid-No.1 resistor.
12.6
12.6
12.6
-0.6
10
-0.8
volts
volts
volt
0.4
2700
1.9
0.7
megohm
J.Lmhos
rna
rna
-2.8
volts
volts
1200
1
-3.5
Maximum Circuit Values:
Grid-No.I-Circuit Resistance ............................ .
10 max
10 max megohms
DIODE UNIT
Maximum Ratings, (Design-Center Values):
PLATE CURRENT ................................................. .
5 max
rna
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 2 rna .......................... .
10
volts
MEDIUM-MU TWIN TRIODE
12FV7
Miniature type used in relay-control tuning units of television receivers.
Outline 8D, OUTLINES SECTION.
Tube requires. miniature nine-contact
socket and may· be mounted in any
position.
Serie8
HEATER ARRANGEMENT:
IIEATER VOLTAGE CAC/ne) ............................... .
12.6
HEATER CURRENT ...................................... .
0.45
DIRECT INTERELECTRODE CAPACITANCES (Each Unit, Approx.):
Grid to Plate .................................................. .
Grid to Cathode and Heater ..................................... .
Plate. to Cathode and Heater .................................... .
402
Parallel
6.3
0.9
6
0.6
5.5
volts
ampere
pf
pf
pf
========;;;;;;;;;; Technical Data ========;;;;;;;;;;;;;
CLASS A, AMPLIFIER (Eaell Unil)
Characteristics:
Plate Voltage ...................................................... .
Grid Voltage ....................................................... .
Amplification Factor ................................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance .................................................. .
Plate Current ...................................................... .
Grid Voltage (Approx.) for plate current of 100 "a ..................... .
100
-2
21".5
2250
9600
16
-10
volts
volts
ohms
"mhos
ma
volts
RELAY CONTROL (Each Unil)
Maximum Ratings, (De.ign-Maximum Value.):
PLATE VOLTAGE .................................................... .
GRID VOLTAGE, Positive-bias value ..........................•........•
CATHODE CURRENT .....................................•....••••...•
PLATE DISSIPATION:
For ON times up to 80 seconds in any 2-minute interval. ........... .
For ON times exceeding 80 seconds in any 2-minute interval. ........ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
800 max
80 max
volts
volts
ma
4.5 max
2.5 ma:z:
watts
watts
200 ma:z:
200·ma:z:
volts
volts
o ma:z:
Typical Operation with 5000-0hm Relay Load (Each Unil):
ON Time Up 10 80 Second. in An" !-Minule ]nler.al
Plate-Supply Voltage ............................................... .
Zero-Bias Plate Current ............................................. .
Grid Resistor ...................................................... .
Grid Voltage (Approx.) for plate current of 2 mao ...................... .
270
86
2.2
-18
megohms
volts
3.3
megohm.
volts
rna
Mf:Jximum Circuit Values.
Grid-Circuit Resistance ............................................. .
• The dc component must not exceed 100 volts.
AVERAGE PLATE CHARACTERISTICS
EACH UNIT
SERIES-HEATER
ARRANGEMENT.
II
40
I
If
/
I
J
/
/
I
V
I
V
I
/
/
If
I
V
1/
/
/
o
I
rl
i
1
t;~,U2~~
I
V
100
/
~
/
II
V
I
1
V
if
V
J
/
I:!
I
/
7
I iJ
V
I
V
/
.,/ . /V ...-V V
200
250
V
150
PLATE VOLTS
~
4
/
J
/
.. V V
/
7
/
300
l'
I
/
/
/
/
/
}
V
V
./" ~ V
350
<--
7'
~
400
92CM-1I458T
5GI
H
G2
POWER PENTODE
12FX5
Miniature type used in output
2
7
stages of audio amplifiers employing
Related type.
G,
P
series-connected heater strings. Out6OFX5
I( ,
line 7C, OUTLINES SECTION.
G3
Heater volts (acjdc), 12.6; amperes,
0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is
identical with miniature type 60FX5.
3
---
b
403
RCA Receiving Tube Manual
MEDIUM-MU TRIODEPENT AGRID CONVERTER
H,KT
12.FX8
Miniature type used as combined PHP 3
rf amplifier and frequency converter
in low B+ voltage automobile radio GIHP 2
receivers operating directly from 12volt storage-battery systems. Outline G2,G4HP
G3HP
8D, OUTLINES SECTION, except vertical dimensions are 3/16 inch shorter.
Tube requires miniature nine-contact socket and may be operated in any position.
Heater-voltage range (de), 10 to 15.9; amperes at 12.6 volts, 0.27.
HEPTODE UNIT AS CONVERTER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .............................. .
GRID-No.3 (CONTROL-GRID) VOLTAGE:
Negative-bias value ............................... .
Positive-bias value. . . . . . . . . . . . . . . . . . . . . . . ............. , .
GRIDS-No.2 and No.4 (SCREEN GRID) VOLTAGE ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ..................... .
Typical Operatian and Characteristics with 12.6 Volts on Heater:·
Plate Voltage .................................................. .
Grid-No.3 Voltage-................................................. .
Grids-No.2 and No.4 Voltage ........................................ .
RMS Grid-No.1 (Oscillator-Grid) Voltage ...................... .
Grid-N 0.1 Resistor ................................................. .
Plate Resistance (Approx.) ................................ .
Conversion Transconductance . ............................... , ...... .
Grid-No.3 Voltage (Approx.) for conversion transconductance of 10 I'mhos
Plate Current ..................................... .
Grids-No.2 and No.4 Current ........................ .
Oscillator Characteristics (Not Oscillating):*
Plate and Grids-No.2 and No.4 Voltage .............. , ................ .
Grid-No.3 Voltage ............. .
Grid-No.1 Voltage ........................................ .
Amplification Factor (between grid No.1 and grids
No.2 and No.4 connected to plate) ................ .
Transconductance (between grid No.1 and grids
No.2 and No.4 connected to plate) ............................ .
Cathode Current ................................................... .
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a .................. .
*With grids No.2 and No.4 connected to plate and with 12. ~ volts on heater.
Maximum Circuit Values:
Grid-N 0.3-Circuit Resistance ........................................ .
• With self-excitation.
- Developed across a 2.2-megohm grid-No.3 resistor.
TRIODE UNIT AS CLASS AI AMPLIFIER
Maximum Ralings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
Characteristics with 12.6 Volts on Heater:
Plate Voltage ................................................. .
Grid Voltageo ..................................................... .
Amplification Factor ................................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................ .
Plate Current ...................................................... .
Grid Voltage (Approx.) for plate current of 10 I'a ...................... .
° Developed across a 2.2 megohm grid resistor
404
16 max
volts
16 max
o max
16 max
volts
volts
volts
16 max
16 max
volts
volts
12.6
-0.5
12.6
1.6
33000
0.5
300
-3
290
1.25
volts
volt
volts
volts
ohms
megohm
J'mhos
volts
"a
rna
12.6
0
0
volts
volts
volts
9
3600
4.4
-4.5
I'mhos
rna
volts
10 max megohms
16 max
12.6
-0.8
10
7150
1400
1.3
-3.2
volts
volts
volt
ohms
I'mhos
rna
volts
Technical Data
~
4
~p
PENT AGRID CONVERTER
Miniature type used as converter in low
B+ voltage automobile radio receivers operatH 3
•••
b G~
ing directly from 12-volt storage-battery sys:::
G4
tems. Outline 7B, OUTLINES SECTION. Tube
requires minia tUre seven-contact Eocket. HeaterK2
7G
GS
3
voltage range (ac Ide), 10 to 15.9; amperes at
I
12.6 volts, 0.15. Typical operation as converter:
GI
heater volts, 12.6; plate and grids-No.2-andNo.4 volts, 12.6 (16 max); grid-No.3 supply
volts,O max; grid-No.3 resistor (bypassed), 2.2 megohms; rms grid-No.1 volts, 1.6; grid-No.1 resistor,
33000 ohms; plate resistance (approx.), 1 megohm; conversion transconductance, 140 .umhos; plate rna.,
0.3; grids-No.2-and-No.4 ma., 0.8; grid-No.1 ma., 0.06; peak heater-cathode volts, 16 max. This type
is used principally for renewal purposes.
G!
~
P
12GA6
~GI
:3 3 _.-.-_
BEAM POWER TUBE
Glass octal type used as horizon--tal-deflection amplifier in television reH 2
7 H
ceivers employing series-connected
8
heater strings. Outline 21, OUTLINES
G2
SECTION. Tube requires octal socket
and may be operated in any position. Heater volts (ae/de), 12.6; amperes, 0.6;
warm-up time (average), 11 seconds.
12 GC6
CLASS Al AMPLIFIER
Characteristics:
Plate Voltage .......................................... .
Grid-N 0.2 (Screen-Grid) Voltage .................. .
Grid-No.1 (Control-Grid) Voltage .. .
Triode Amplification Factor for
plate and grid-No.2 voltages of 150 volts.
. ........ .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 1 ma ...... .
60
150
0
345
30°
0
250
150
-22.5
volts
volts
volts
4.1
20000
6600
75
2.4
-46
ohms
JJ.mhos
ma
ma
volts
HORIZONTAL· DEFLECTION AMPLIFIER
For operation in a 51l5·line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGE-. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ............................... .
DC GRID-No.2 VOLTAGE ........................................... .
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ........................... .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATION-................................................ .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
max
max
max
max
max
max
max
max
max
volts
volts
volt.
volts
volts
ma
ma
watts
watts
200 max
200 0 max
220 max
volts
volts
°C
770
6500
-1500
220
-330
550
175
17.5
4.5
Maximum Circuit Values:
1 max megohm
Grid-N o.l-Circuit Resistance ........................................ .
o This value can be measured by a method involving a recurrent waveform such that the maximum
ratings will not be exceeded.
• This rating is applicable where the duration of tbe voltage pulse does not exceed 15 per cent of one
horizontal scanning cycle. In a 525-line, 30-frame system, 15 per cent of one horizontal scanning cycle
is 10 microseconds.
• An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
C The dc component must not exceed 100 volts.
405
RCA Receit1ing Tube Manual
BEAM POWER TUBE
Duodecar type used as horizontaldeflection-amplifier tube in television
receivers employing series-connected
Related types:
6GE5,17GE5
heater strings. Outline 20, OUTLINES
SECTION. Heater volts (ac/dc), 12.6;
amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with duodecar type 6GE5.
12GES
H
BEAM POWER TUBE
Novar type used in horizontal-deflection-amplifier circuits of television
IC
receivers employing series-connected
Related types:
6GJ5,17GJ5
heater strings. Outline 18A, OUTIC
LINES SECTION. Tube requires novar nine-contact socket and may be operated in any position. Heater volts (ac/dc),
12.6; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings,
this type is identical with novar type 6GJ5.
12GJS
SHARP-CUTOFF PENTODE
Miniature type with frame grid
used as video amplifier tube in television receivers employing series-connected heater strings. Outline 8D,
9
OUTLINES SECTION. Tube requires
K
G3.1$
miniature nine-contact socket and may be mounted in any position. Heater volts,
6.3 (series), 12.6 (parallel); amperes, 0.6 (series), 0.3 (parallel); warm-up time
(average), 11 seconds.
12GN7
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-NO.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts ............................ .
For grid-N 0.2 voltages between 165 and 330 volts .................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative witb respect to cathode ......................... .
Heater positive with respect to cathode ..................... .
400 max
vol t.
330 max
volts
See curve page 70
o max
volts
7.5 max
watts
1. 5 max
watts
See curve page 70
200 max
200·max
vol ts
volts
Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Grid-No.1 Voltage .......... ' ............................ .
Cathode-Bias Resistor .................................. .
Plate Resistance (Approx.) .............................. .
Transconductance ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.) for plate current of 100 p.a ..... .
50
125
o
250
150
o
56
0.05
36000
28
6.5
-5.7
volts
volts
volts
ohms
megohm
p.mhos
rna
rna
volts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance ...................................... .
0.25 max megohm
• The dc component must not exceed 100 volts.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
406
========= Technical Data =========
H
BEAM POWER TUBE
Novar type used as horizontaldeflection amplifier in television reRelaled Iypes:
ceivers employing series-connected
6GT5,17GT5
heater strings. Outline 17A, OUTG2'
LINES SECTION. Tube requires novar nine-contact socket and may be operated in any position. Heater volts (ac /dc),
12.6; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater ratings,
this tube is identical with novar type 6GT5.
12GT5
Nc~G!
p
5G,
BEAM POWER TUBE
Glass octal type used as horizontal-deflection amplifier in high-effiRelaled Iypes:
ciency deflection circuits of television
6GW6,17GW6
N~
8K
receivers employing series-connected
G3
heater strings, Outline 21, OUTLINES
SECTION. Tube requires octal socket and may be operated in any position.
Heater volts (ac/dc), 12.6; amperes, 0.6; heater warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with glass octal type 6GW6.
3
H 2
---
12GW6
7 H
~
024
5 POt
TWIN DIODE
Metal type used as detector, lowvoltage rectifier, or avc tube in aclde
H 2
7 H
Relaled Iype:
radio receivers. Maximum dimensions:
6H6
I
8
over-all length, 1-3/4 inches; seated
S
KOt
height, 1-3/16 inches, diameter, 1-1/32
inches. Heater volts (acldc), 12.6; amperes, 0.15. Except for heater ratings, this
type is identical with metal type 6H6.
P023
p~
___ 5G
2
7
H
H
I
8
NC
to(.
12H6
MEDIUM-MU TRIODE
Glass octal type used as detector, amplifier,
or oscillator in ac/dc radio equipment. Outline
14C, OUTLINES SECTION. This type may be
supplied with pin No.1 omitted. Heater volts
(ac/dcl, 12.6; amperes, ,0.15. Except for heater
rating and base, this type is identical with glassoctal type 6J5-GT. Type 12J5-GT is used principally for renewal purposes.
12J5GT
Relaled Iype:
6J5GT
SHARP-CUTOFF PENTODE
Glass octal type used as biased detector or
high-gain audio amplifier in ac/dc radio receivers.Outiine 15A,OUTLINESSECTION. Heater
volts (ac/dcl, 12.6; amperes, 0.15. Except for
heater rating, this type is identical with glas.octal type 6J7-GT. Type 12J7-GT is used
principally for renewal purposes.
H
12J7GT
Relaled Iype:
6J7GT
TWIN DIODE-POWERTETRODE
Miniature type used as combined detector
and audio driver in low B+ voltage automobile
radio receivers operating directly from 12-volt
storage-battery systems. Outline SB, OUTLINES SECTION. Tube requires miniature
nine-contact socket. Heater-voltage range
(ac Ide), 10 to 15.9; amperes at 12.6 volts, 0.325.
Typical operation of tetrode unit as audio
driver: heater volts, 12.6; plate and grid-No.2
12J8
407
RCA Receiving Tube Manual
volts, 12.6 (30 max); grid-No.1 volts, 0; peak af grid-No.1 volts, 2.26; grid-No.1 resisistor, 2.2 megohms
(bypassed by 1-llf capacitor); zero-signal plate rna., 12; zero-signal grid-No.2 rna., 1.5; plate resistance
(approx.), 6000 ohms; transconductance, 5500 Ilmhos; load resistance, 2700 ohms, maximum-signal
power output, 20 milliwatts. Maximum diode plate rna. (each unit), 5. Peak heater-cathode volts, 30
max. This type is used principally for renewal purposes.
H
BEAM POWER TUBE
12J 86
N ovar type used as high-efficiency
horizontal-deflection-amplifier tube in
Related types:
television receivers employing series6JB6,17JB6
connected heater strings. Outline 18A,
'
OUTLINES SECTION. Heater volts
G2
(ac/dc), 12.6; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater
ratings, this type is identical with novar type 6JB6.
POWER TETRODE
~H
4
5 G,
H 3
6 G,
Miniature type used as power amplifier driver in low B+ voltage autoG22
7 P
mobile radio receivers operating directly from 12-volt storage-battery
I
systems. Outline 7C, OUTLINES
K
SECTION. Tube requires miniature seven-contact socket and may be mounted in
any position. Heater-voltage range (ac/dc), 10.0 to 15.9; amperes (approx.) at
12.6 volts, 0.4. Maximum ratings and characteristics are the same as those of the
tetrode unit of miniature type 12DL8.
12 K5
REMOTE-CUTOFF PENTODE
12K7GT
Related type:
6K7GT
Glass octal type used as rf or if amplifier in
ac/de radio receivers particularly those employing ave. Outline 15A, OUTLINES SECTION.
Heater volts (ac/de), 12.6; amperes, 0.15. Except for heater ratings, this type is identical with
glass octal type 6K7-GT. Type 12K7-GT is
used principally for renewal purposes
TRIODE-HEXODE CONVERTER
12K8
Related type:
6K8
Metal type used as combined triode oscillator and hexode mixer in ac/de radio receivers.
Outline 4, OUTLINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except for heater
ratings, this type is identicalwith metal type 6K8.
Type 12K8 is used principally for renewal
purposes.
DIODESHARP-CUTOFF PENTODE
H
Miniature type used in combined
if-amplifier and AM-detector service
Related type:
in AM and AM/FM broadcast re6KL8
ceivers employing series-connected
heater strings. Pentode unit may also
be used as an rf- or if-amplifier or limiter tube; the diode unit may be used for avc
or detection. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 12.6; amperes, 0.15; warm-up time (average), 17 seconds. Except for heater ratings, this
type is identical with miniature type 6KL8.
12KL8
408
=========- Technical Data
~
24
~GI
BEAM POWER TUBE
Glass octal type used in audio output stages
of television receivers employing series-connect~3
edheatedstrings.OutlineI4C,OUTLlNESSECTION. This type may be supplied with pin No.
1 omitted. Heater volts (ac/dc), 12.6; amperes,
Related type.:
2
7
0.6;
warm-up time (average), 11 seconds. Peak
H
H
25L6, 25L6GT, 50L6GT
heater-cathode
volts:
heater
negative
with
re18K
spect to cathode, 300 max; heater positive with
Ne
G3
respect to cathode, 200 max (the de component
must not exceed 100 volts). Except for heater and heater-cathode ratings, this type is identical with
glass octal type 50L6-GT. Type 12L6-GT is used principally for renewal purposes.
12L6GT
TWIN DIODE-HIGH-MU TRIODE
Glass octal type used as combined detector,
amplifier, and ave tube in Be/de radio receivers.
Outline 15A, OUTLINES SECTION Heater
volts (ac/dc), 12.6; amperes, 0.15. Except for
heater rating, this type is identical with glass
octal type 6Q7-GT. Type 12Q7-GT is used
principally for renewal purposes.
BEAM POWER TUBE
Miniature type used as a vertical
deflection amplifier in television receivers employing series-connected
heater strings. Outline 7C, OUTLINES SECTION. Tube requires miniature seven-contact socket and may
be mounted in any position.
12Q7GT
Related type:
6Q7GT
12R5
HEATER VOLTAGE (AC/DC)............................................
12.6
volts
HEATER CURRENT...................................................
0.6
ampere
HEATER WARM-UP TIME (Average). . . .................................
11
seconds
PLATE RESISTANCE (Approx.)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13000
ohms
TRANSCONDUCTANCE*. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7000
"mhos
* For plate and grid-No.2 ·volts, 110; grid-No.1 volts, -8.5, plate rna., 40; grid-No.2 rna., 3.3.
VERTICAL DEFLECTION AMPLIFIER
For operation in a 525-line, aO-frame system
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ................................................ .
PEAK POSITIVE-PULSE PLATE VOLTAGEt (Absolute Maximum) . ........... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............ .
PEAK CATHODE CURRENT ............................................ .
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ................... .
150 max
1500·max
150 max
-150 max
155 max
45 max
4.5 max
1 max
volt.
volts
volts
volts
rna
rna
watts
watt
300 max
200·max
volts
volts
Maximum Circuit Value:
Grid-No.1-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 max megohm.
t The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds .
• Under no circumstances should this absolute value be exceeded.
• The dc component must not exceed 100 volts.
TRIPLE DIODE-HIGH-MU TRIODE
Glass octal type used as audio amplifier,
AM detector, and FM detector in AM IFM receivers. Outline 15B, OUTLINES SECTION.
Heater volts (ac Ide), 12.6; amperes, 0.15. Except for heater ratings, this type is identical
with glass octal type 6S8-GT. Type 12S8-GT is
a DISCONTINUED type listed for reference
only.
12S8GT
Related type:
658GT
409
RCA Receiving TlIbe Manttal
PENTAGRID CONVERTER
125A7
125A7GT
Related types:
65A7,65A7GT
Metal type 12SA 7 and glass octal
type 12SA7-GTused as converter in
ac/dc receivers. Outlines 2 and 14C,
respectively, OUTLINES SECTION.
Heater volts (ac/dc), 12.6; amperes,
0.15. Except for heater ratings, these
types are identical with metal type
6SA7 and glass octal type 6SA7-GT.
Type 12SA7-GT is used principally
for renewal purposes.
HIGH-MU TWIN TRIODE
125C7
Related type:
65C7
Metal type used as phase inverter or voltage amplifier in ac Idc radio equipment. Outline
2, OUTLINES SECTION. Heater volts (ac Idc) ,
12.6; amperes, 0.15. Except for heater ratings,
this type is identical with metal type 6SC7.
Type 12SC7 is used principally for renewal purposes.
HIGH-MU TRIODE
125F5
12SF5GT
Related types:
65F5, 65F5GT
Metal type 12SF5 and glass octal type
12SF5-GT used in resistance-coupled amplifier
circuits of ac Idc radio equipment. Outline 2 and
14C, respectively, OUTLINES SECTION.
Heater volts (ac Idc), 12.6; amperes, 0.15. Except for heater ratings, these types are identical
with metal type 6SF5 and glass octal type
6SF5-GT, respectively. Type 12SF5-GT is a
DISCONTINUED type listed for reference
only. Type 12SF5 is used principally for renewal
purposes.
DIODE-REMOTE-CUTOFF PENTODE
125F7
Related type:
65F7
Metal type used as combined rf or if amplifier and detector or avc tube in ac/dc radio
receivers. Outline 2, OUTLINES SECTION.
Heater volts (ac/dc), 12.6; amperes, 0.15. Except for heater ratings, this type is identical with
metal type 6SF7. Type 12SF7 is used principally for renewal purposes.
SEMIREMOTE-CUTOFF PENTODE
125G7
Related type:
65G7
410
Metal type used as rf amplifier in ac Ide re.ceivers in vol ving high-frequency, wide-band applications. Outline 2, OUTLINES SECTION.
Heater volts (ac Idc) , 12.6; amperes, 0.15. Except for heater ratings, this type is identical
with metal type 6SG7. Type 12SG7 is used principally for renewal purposes.
G~
___ :
K 2
7 H
I
S:l2sr~
NC:IZSf$-C:;T
8
H
========- Technical Data ========SHARP·CUTOFF PENTODE
Metal type used as rf amplifier in ae/de
receivers involving high-frequencY, wide-band
applications and as limiter tube in FM equipDlent. Outline S, OUTLINES SECTION. Heater volts (ae/de), 12.6; amperes, 0.15. Except for
heater ratings, this type i. identical with metal
type 6SH7. Type 12SH7 i. used principally for
renewal purposes.
SHARP·CUTOFF PENTODE
12SH7
1.1..... ty....
6SH7
12SJ7
Metal type 12SJ7 and glass-octal
type 12SJ7-GT used as rf amplifiers
12SJ7GT
and biased detectors in ac/dc radio
lelated ty.....
receivers. Outline 2 and 14C, respec6SJ7,65J7GT
tively, OUTLINES SECTION.
Heater volts (ac/dc), 12.6; amperes, 0.15. Except for heater ratings, these types are
identical with metal type 6SJ7 and glass-octal type 6SJ'Z-GT. Type 12SJ7-GT is
a DISCONTINUED type listed for reference only.
G3~G14
3
___
$K
6
G2
REMOTE·CUTOFF PENTODE
12SK7
12SK7GT
Metal type 12SK7 and glass octal
type 12SK7-GT used as rf and if amH 2.
7H
plifiers in ac/dc radio receivers. Outlel...dty_.
5:1251<7 1
6P
lines 2 and 14C, respectively, OUT6SK7, 7SK7GT
8C:1251<7-GT
LINES SECTION. Heater volts
(ac/dc), 12 .6; amperes, 0.15. Except for heater ratings, these types are identical
with metal type 6SK7 and glass octal type 6SK7-GT. Type 12SK7-GT is used
principally for renewal purposes.
HIGH-MU TWIN TRIODE
Glass octal type used as phase inverter or resistance-coupled amplifier
in ac/dc radio equipment. Outline 14C,
OUTLINES SECTION. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except
for heater rating, this type is identical
with glass octal type 6SL7-GT.
MEDIUM-MU TWIN TRIODE
12SL7GT
12SN7GT
12SN7GTA
Glass octal types used as combined
vertical oscillators and vertical deflection amplifiers, and as horizontal delelated ty....
flection oscillators in television receiv6SN7GTI
ers. May also be used in multivibrator
or resistance-coupled amplifier circuits in radio receivers. Outline 14C, OUTLINES
SECTION. Heater volts (ac/ de), 12.6; amperes, 0.3. Except for heater ratings,
these types are identical with glass octal types 6SN7-GT and 6SN7-GTB, respectively. Type 12SN7-GT is a DISCONTINUED type listed for reference only.
411
RCA Receiving Tube Manual
12SQ7
12SQ7GT
TWIN DIODE-HIGH-MU TRIODE
K~PD2
4
:01
3
PT
6
Metal type 12SQ7 and glass octal
1 H
type 12SQ7-GT used as combined de- GT 2
tector, amplifier, and avc tube in ac/dc
Related types:
65Q7, 65Q7GT
radio receivers. Outlines 2 and 14C, re- 5,125Q1 I
8 H
spectively, OUTLINES SECTION. eC'125Q1-GT
Heater volts (acl dc), 12.6; amperes, 0.15. Except for heater ratings, these types are
identical with metal type 6SQ7 and glass octal type 6SQ7-GT.
TWIN DIODEMEDIUM-MU TRIODE
~
''D204
SPOI
K
PT
3
6
Metal type 12SR 7 and glass octal type
12SR 7-GT used as combined detector, amplifier,
and ave tube in ae/de radio receivers. Outlines GT 2
--1 H
2and 14C ,respectively, OUTLINES SECTION •
Heater volts (ac/dc), 12.6; amperes, 0.15. ExI
8
Related types:
cept for heater rating, type 12SR7 is identical
5'12SR7
H
65R7, 65R7GT
with type 6SR7, and type 12SR7-GT is elec- eC:12SR1-GT
trically identical with type 6SR 7 except for interelectrode capacitances. Type 12SR 7 is used
principally for renewal purposes. The 12SR7-GT is a DISCONTINUED type listed for reference only.
12SR7
12SR7GT
MEDIUM-MU TWIN TRIODE
Miniature type used as general-purposeamplifier tube in automobile-radio receivers operating directly from 12-volt storage-battery
systems. Outline 8B, OUTLINES SECTION.
Tube requires miniature nine-contact socket
and may be mounted in any position. Heater
voltage range (ac/dc), 10.0 to 15.9; amperes
(approx.) at 12.6 volts, 0.15. Maximum ratings
(each unit) as class At amplifier: plate volts, 30
max; cathode ma., 15 max; peak heater-cathode volts, 30 max. This type is used principally for renewal
12U7
purposes.
BEAM POWER TUBE
204
~
SGI
__ _
Glass octal type used as output P: 3
amplifier primarily in automobile radio
1
receivers operating from a 12-volt stor- H 2
Related types:
H
5V6GT,6V6GT
age battery. Outline 14C, OUTLINES
18K
SECTION. Tube requires octal socket
NC
G3
and may be mounted in any position. Heater volts (ac/dc), 12.6; amperes, 0.225.
Except for heater rating, this type is identical with glass octal type 6V6-GT.
12V6GT
24
~
SCI
BEAM POWER TUBE
1'\3
Glass octal type used in the audio
output stages of television receivers em7 ..
ploying series-connected heater strings. H2
Related type:
6W6GT
Triode-connected, this type is used as
18K
a vertical deflection amplifier. Outline
NC
G3
14C, OUTLINES SECTION. This type may be supplied with pin No.1 omitted.
Heater volts (ac/dc), 12.6; amperes, 0.6; warm-up time (average), 11 seconds.
Peak heater-cathode volts: heater negative with respect to cathode, 300 max (the
dc component must not exceed 200 volts); heater positive with respect to cathode,
200 max (the dc component must not exceed 100 volts). Except for heater and
heater-cathode ratings, this type is identical with glass octal type 6W6-GT.
12W6GT
412
========;;;;;; Technical Data ========;;;;;;
~
H3
H
4
~
NC
~
FULL-WAVE VACUUM RECTIFIER
sPOt
Miniature type used in power
supply of automobile radio receivers
NC
1\
operating from a 12-volt storage batRelated type:
I
tery. Outline 7C, OUTLINES SEC6X4
PD.
TION. Heater volts (ac/dc), 12.6; amperes, 0.3. Except for heater ratings, this type is identical with miniature type 6X4.
2
12X4
7
HALF-WAVE VACUUM RECTIFIER
P~I\
~
H
H
Glass types used in power supply of ac Ide
receivers. Maximum dimensions: over-all length,
4-3/16 inches; seated height, 3-9/16 inches; diameter, 1-9/16 inches. Tube requires four-contact socket. Heater volts (ac Ide), 12.6; amperes,
0.3. Maximum ratings as half-wave rectifier:
peak inverse plate volts, 700 max; peak plate
rna., 330 max; de output rna., 55 max; peak
heater-cathode volts, 350 max. This is a DISCONTINUED type listed for reference only.
12Z3
HIGH-MU TRIODE
N uvistor type used in booster amplifiers of antenna systems serving multiple television receiver installations.
Outline 1, OUTLINES SECTION.
Heater volts (ac/dc), 13.5; amperes,
0.06. Except for heater ratings, this type
13CW4
R.lated type..
2CW4,6CW4
DUAL TRIODE
Miniature type used as combined
vertical-deflection-oscillator and vertical-deflection-amplifier tube in teleRelated type..
vision receivers employing series-con6E07,100E7
nected heater strings. Unit No.1 is a
medium-mu triode unit used as a blocking oscillator in vertical-deflection circuits,
and unit No.2 is a low-mu triode unit used as a vertical-deflection amplifier. Outline 8D, OUTLINES SECTION. Heater volts (ac/dc), 13; amperes, 0.45; warmup time (average), 11 seconds. Except for heater ratings, this type is identical with
miniature type 6DE7.
13DE7
DUAL TRIODE
13DR7
Miniature type containing highmu and low-mu triodes; used as combined vertical-deflection-oscillator and
Related type..
vertical-deflection-amplifier tube in
60R7, 100R7
television receivers. Outline 8D, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be operated in any position. Heater volts (ac/dc), 13; amperes, 0.45; warm-up time
(average), 11 seconds. Except for heater ratings, this type is identical with type 6DR 7.
413
RCA Receiving TlIbe Manual
DUAL TRIODE
Glass octal type containing highmu triode and high-perveance, lowRelated Iypes:
mu triode; used as combined vertical6EM7, 10EM7
deflection oscillator and vertical-deflection amplifier in television receivers
employing series-connected heater strings. Outline 14B, OUTLINES SECTION.
Heater volts (ac/dc), 13; amperes, 0.45; warm-up time (average), 11 seconds.
Except for heater ratings, this type is identical with type 6EM7.
13EM7
DUAL TRIODE
Glass type containinghigh-mu and
low-mu triode units used as combined
Related Iype:
vertical-deflection oscillator and verti6FD7
cal-deflection amplifier in television
receivers employing series-connected
heater strings. Heater volts (ac/dc), 13; amperes, 0.45; warm-up time(average), 11
seconds. Except for heater ratings, this type is identical with glass type 6FD7.
13FD 7
H
BEAM POWER TUBE
Neonoval type used as horizontaldeflection amplifier in television reGI
ceivers. Maximum dimensions: overalllength,4-7/64 inches; seated height,
GI
Ie
3-49/64 inches; diameter, 1-3/16 in.
Tube requires neonoval nine-contact socket and may be mounted in any position.
Heater volts (ac/dc), 13.3; amperes, 0.6. Typical instantaneous characteristics
(measured with recurrent waveform such that maximum ratings are not exceeded):
plate volts, 75; grid-No.2 volts, 200; grid-No.1 volts, -10; plate ma., 440; grid-No.2
ma., 37.
13GB5
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 5:1l5-line, IlO-frame 8118tem
Maximum Ratings, (De8ign-Maximum Values):
DC PLATE VOLTAGE • . • . . . . . . . • . • . . . . . • . . . • . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK POSITIVE-PULSE PLATE VOLTAGE- • • • . • . . . . . . . . . . . . . . . • . . . . . . . • . .
GRID-No.2 (SCREEN-GRID) VOLTAGE •••.........•...•.•.•....•....•....
AVERAGE CATHODE CURRENT . . . . • . . . . . . . . . • . . . . . • . . . . . • . . . . . . . . . . . • . .
PLATE DISSIPATION ••.....••..••.••••.•.•••.•.....•..•......•.•.....•
GRID-NO.2 INPUT .•••••••.•..••....•.........•••...•.•.....•........
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
275
7700
275
275
17
6
max
max
max
max
max
max
volts
volts
volts
ma
watts
watts
250·max
250·max
volts
volts
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
With drive into grid current (horizontal-deflection applications only) ..
2.2 max megohms
Without grid current ........................................... .
0.5 max megohm
- The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, SO-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• The dc component must not exceed 125 volts.
414
========= Technical Data ========H
NC
DUAL TRIODE
Novar type containing high-mu
and high-perveance, low-mu triode
units used as combined vertical-deflecRelated typ...
tion amplifier and vertical-deflection
6OF7, 10GF7
GTI
oscillator in television receivers employing series-connected heater strings. OUtline10A,OUTLINESSECTION. Heater
volts (ac/dc), 13; amperes, 0.45; warm-up time (average), 11 seconds. Except for
heater ratings, this type is identical with novar type 6GF7.
13GF7
POWER PENTODEBEAM POWER TUBE
13Jl0
Duodecar type used in FM and
television receivers employing seriesconnected heater strings. The pentode
unit is used in audio power-output
stages, and the beam power unit is
used as a gated-beam discriminator inFM and television limiter and discriminator
applications. Outline 12B, OUTLINES SECTION. Tube requires duodecar
twelve-contact socket and may be mounted in any position. Heater volts (acjdc),
13.2; amperes, 0.45; warm-up time (average), 11 seconds.
PENTODE UNIT AS CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN"GRID) VOLTAGE .................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT ........................................•..........
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
275
275
10
2
max
max
max
max
volts
volts
watts
watts
200 max
200·max
volts
volts
Characteristics and Typical Operation:
Plate Voltage ...................................................... .
Grid-No.2 Voltage .................................................. .
Grid-No.1 Voltage .................................................. .
Peak AF Grid-No.1 Voltage ......................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance ......................................•............
Zero-Signal Plate Current .......................................... ..
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Load Resistance ................................................... .
Total Harmonic Distortion (Approx.) ................................. .
Maximum-Signal Power Output ..................................... '"
volts
volts
volts
volts
megohm
I'mhos
rna
ma
rna
rna
ohms
per cent
watts
250
250
-8
8
0.1
6500
35
39
2.5
7
5000
10
4.2
,Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
;,..-'
, For fixed-bias operation ......................................... .
For ca thode-bias operation .............. ",' ..................... .
0.25 max megohm
0.5 max megohm
BEAM POWER UNIT AS GATED-BEAM DISCRIMINATOR
Maximum Ratings, (De8ign-MaximumValue8):
PLATE SUPPLY VOLTAGE ............................................. .
GRID-No.2 (ACCELERATOR-GRID) VOLTAGE ............................. .
PEAK POSITIVE GRID-No.1 VOLTAGE .................................. .
AVERAGE CATHODE CURRENT ........................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect. to cathode ........................... .
Hea.ter positive with respect to cathode ........................... .
• The dc component must not exceed 100 volts.
330
110
60
13
max
max
max
max
volts
volts
volts
200 max
200emax
volts
volts
rna
415
RCA Receiving Tube Manual
MEDIUM-MU TRIODE
14A4
Glass lock-in type used as detector, amplifier, or oscillator in ac/dc radio receivers. Outline 13A, OUTLINES SECTION. Tube requires
lock-in socket. Heater volts (ac/dc), 12.6; amperes, 0.15. Except for heater rating and capacitances. this type is electrically identical with
lock-in type 7A4 and metal type 6J5. Type
14A4 is a DISCONTINUED type listed for
reference only.
BEAM POWER TUBE
NC
NC
~
~
G2
GI
Glass lock-in type used as output amplifier in
3
6
ac Ide radio receivers. Outline 13A, OUTLINES
SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 12.6; amperes, 0.15. Typical op2
7 Gl
p
K
eration and ratings as class At amplifier: plate
volts and grid-No.2 volts, 250 (300 max); plate
I
8
diasipation, 7.5 watts; grid-No.2 input, 1.5
H
as H
watts; grid-No.1 volts, -12.5; plate rna., 32;
grid-No.2 ma., 5.5; plate resistance, 70000 ohms; transconductance, 3000 "mhos; load resistance, 7500
ohms; output watts, 2.S. This is a DISCONTINUED type listed for reference only.
14A5
REMOTE-CUTOFF PENTODE
14A7
Glasslock-in type used as rf or if amplifier in
ac Idc radio receivers. Outline 13A, OUTLINES
SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 12.6; amperes, 0.15. Except for
heater rating and capacitances, this type is electrically identical with metal type 6SK7 and
lock-in type 7A 7. Type 14A7 is used principally
for renewal purposes.
MEDIUM-MU TWIN TRIODE
14AF7
Glass lock-in type used as voltage amplifier
or phase inverter in radio equipment. Outline
13A, OUTLINES SECTION. Tube requires
lock-in socket. Heater volts (ac Ide), 12.6; amperes, 0.15. Except for- heater ratings, this type
is electrically identical with lock-in type 7AF7.
Type 14AF7 is used principally for renewal purposes.
TWIN DIODE-HIGH-MU TRIODE
1486
Glass lock-in type used as combined datector, amplifier, and ave tube in ac/dc radio
receivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except for heater
rating and capacitances, this type is electrically
identical with lock-in type 7B6 and metal type
6SQ7. Type 14B6 i. used principally for renewal
purposes.
PENT AGRID CONVERTER
1488
416
Glass lock-in type used as converter in
ac Ide radio receivers. Outline 13A, OUTLINES
SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 12.6; amperes, 0.15. Except for
heater rating and capacitances, this type is electrically identical with lock-in type 7BS and
metal type 6AS. Type 14BS is a DISCONTINUED type listed for reference only.
ii:
3
4
5
IS
G23
P
6 GI
2
7
e
I
H
BS
H
K
Technical Data =========;;;;;
NC
GZ
NC
5
~
3
6
P 2
7
I
~3
8
as
H
BEAM POWER TUBE
GI
H
~
G3
4
5
IS
Glassloek-in type used as output amplifier
in ac Ide radio receivers. Outline 13B, OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 12.6; amperes,
0.225. Except for heater ratings, this type is
electrically identical with lock-in type 7C5 and
metal type 6V6. Type 14C5 is a DISCO~
TINUED type listed for reference only.
14C5
SHARP-CUTOFF PENTODE
Glass lock-in type used as. rf amplifier and
biased detector in ac/dc radio receivers. Outline 13A, OUTLINES SECTION. Tube requires
lock-in socket. Heater volts (ac/dc), 12.6; am2
.
7
P
K
peres, 0.15. Typical operation and maximum
I
8
ratings as class AI amplifier: plate volts,250
(300 ",ax); grid-No.2 volts, 100; plate disH
as H
sipation, 1 ",ax watt; grid-No.2 input, 0.1
",ax watt; grid No.1 volts, -3; grid No.3 connected to cathode at socket; plate resistance, greater than
1 megohm; transconductance, 1575 "mhos; plate rna., 2.2; grid-No.2 rna., 0.7. Within the limits of its
maximum ratings, this type is similar in performance to metal types 6SJ7 and 12SJ7. Type 14C7 is used
principally for renewal. purposes.
G23
6 GI
14C7
TWIN DIODE-MEDIUM-MU TRIODE
Glass lock-in type used as combined detector, amplifier, and ave tube in ae/dc radio
receivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Heater volts,
(ac/de), 12.6; amperes, 0.15. Except for heater
ratings, this type is' electrically identical with
lock-in type 7E6 and miniature type 6BF6.
Type 14E6 is a DISCONTINUED type listed
for reference only.
TWIN DIODE-REMOTE;,.CUTOFF
PENTODE
~
POI
5 G2P.
4
POz 3
6 Glp
Pp 2
7 K
G3p
I
H
8
BS
GT24
H
~
PT2 3
oGTI
___ ..... _
6. PTt
2
7
KTZ
KT!
I
8
H
H
BS
14E6
Glass lock-in type used as combined detector, amplifier, and ave tube in ae/de re..
ceivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Heater volt.
(ac/dc), 126; amperes, 0.15. Except for heater
ratings, this type is electrically identical with
lock-in type 7E7. Type 14E7 is a DISCONTINUED type listed for reference only.
14E1
HIGH-MU TWIN TRIODE
Gla.s lock-in type used as phase inverter
or resistance-coupled amplifier in aelde radio
receivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Heater volts
(ae/de), 12.6; amperes, 0.15. Except for heater
ratings, this type is electrically identical with
lock-in type 7F7 and glass-octal type 6SL7-GT.
Type 14F7 is used principally for renewal
purposes.
14F7
MEDIUM-MU TWIN TRIODE
Glass lock-in type used as amplifier or
oscillator in ae Ide radio equipment. Outline 13A,
OUTLINES SECTION, except over-all length
is 2-9/32 max inches and seated length is 1-3/4
inches. Tube requires lock-in socket. Heater
volts (aclde), 12.6; amperes, 0.15. Except for
heater ra.tings, this type is electrically identical
with lock-in type 7F8. Type 14F8 is used
principally for renewal purposes.
14F8
417
RCA Receiving Tube Manllal
TWIN DIODE-HIGH-MU TRIODE
Miniature type used as combined
detector and af voltage amplifier in
radio receivers. Outline 8B, OUTLINES SECTION. Tube requires
miniature nine-contact socket and may
be operated in any position.
14GT8
HEATER VOLTAGE (Ac/oc).
HEATER CURRENT ..... ' .. .
volts
ampere
14
0.15
72
72000
1000
AMPLIFICATION FACTORo, . . . . . , ..
PJ;ATE'RESISTANCE (Approx.)O ..
TRANSCONDUCTANCEo . . .
o For triode unit; -plate volts, .250; grid volts,
~3;
ohms
.umhos
plate rna., 0.7.
TRIODE UNIT AS CLASS AI' AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ..................... .
GRID VOLTAGE, Positive-bias value, ... .
PLATE DISSIPATION.. .
' ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..... ,
Heater .positive with respect to cathode .... .
330 ",ax
o max
1.1 max
volts
volts
watts
200 max
200-max
volts
volts
DIODE UNITS (Each Unit)
Maximum Ralings, (Design-Maximum Values):
PLATE CURRENT ........................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. , ... .
Heater'positive with respect to' cathode .. .
5 max
rna
200 max
200·max
volts
volts
Characteristics, Instantaneous Value:
Tube Voltage Drop for plate current of 18 rna.
• The de component must not exceed 100 volts.
volts
AVERAGE PLATE CHARACTERISTICS
TYPE 14GTB
EI'"14 VOLTS
-;f ~~ '(!),'"
'v"
,,-"
b~&'/V / ;l,,/
VI V I ~)t
V/ V/ 1/ //
6
'I
5
~
2
:~6;
V VL ~ lL: V/ / ,1/0 'L' V ~ ~ ~~
'~ ~ ~ ~ ~ ~ ~ ~~
o
100
200
300
400
PLATE VOLTS
500
SEMIREMOTE-CUTOFFPENTODE
14H7
418
Glass lock-in type used as rf or if amplifier
in ac /dc radio receivers. Outline 13A. OUT. .
LINES SECTION. Tube requir~slock-in socket.
'Heater ;volts (ac/dc)" 12.6; amperes, 0.15. Except for heater 'ratings,_ this type is electrically
identical with type 7H7., Type 14H7 is a DISCONTINUED type listed for reference only.
G3",
'4
~
<>2
p.
5 IS
3
2
6
7
,
I
Has'
8
H
CI
K
=========- Technical Data
TRIODE-HEPTODE CONVERTER
Glass lock-in type used as combined triode
oscillator and heptode mixer in ae/de radio receivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Heater vol ts
(ac/dcl, 12.6; amperes, 0.15. Except for heater
ratings, this type is electrically identical with
lock-in type 7J7. Type 14J7 is a DISCONTINUED type listed for reference only.
as
T24
MEDIUM-MU TWIN TRIODE
~
PT2 3
.GTI
___ ___6 PTI
2
1
KTZ
KTI
I
H
8
G14
Gz
H
as
~
---
G3
6
P 2
1 K
I
H
8
as
Glass lock-in type used as voltage amplifier or phase inverter III ae/de radio equipment.
Outline 13B, OUTLINES SECTION. Tube requires lock-in socket. Heater volts (ac/ de) ,12.6;
amperes, 0.3. Exct'pt for heater ratings and
capacitances, this type is electrically identical
with lock-in type 7N7 and glass-octal type
6SN7-GT. Type 14N7 is a DISCONTINUED
type listed for reference only.
14N7
PENT AGRID CONVERTER
sG5
===
G4 3
14J7
H
Glass lock-in type used as converter in
ae Ide radio receivers. Outline 13A, OUTLINES
SECTIO;\[. Tube requires lock-in soeket. Heater
volts (ac/dc), 12.6; amperes, 0.15. Except for
heater ratings and capacitances, this type is
electrically identical with metal type 6SA 7 and
lock-in type 7Q7. Type 14Q7 is used principally
for renewal purposes.
14Q7
TWIN DIODEREMOTE-CUTOFF PENTODE
Glass lock~in type used as combined detector, amplifier~ and ave tube in ac/dc radio
receivers. Outline 13A, OUTLINES SECTION.
Tube requires lock-in socket. Heater volts
(ac/dc), 12.6; amperes, 0.15. Except for heater
ratings, this type is electrically identical with
lock-in type 7R7. Type 14R7 is used principally
for fe-newal purposesG
~
SHARP-CUTOFF PENTODE
G32
G,
P 2
:::
4
K
G3
I
H
~
H
14R7
Glass type used as rf amplifier in batteryoperated receivers. Outline 24B, OUTLINES
SECTION. Tube requires five-contact socket.
Heater volts (de), 2.0; amperes, 0.22. Typical
operation as class At amplifier: plate volts, 135
max; grid-No.2 (screen-grid) volts, 67.5 max;
grid-No.1 volts, -1.5; plate ma., 1.85; grid-No.2
rna., 0.3; plate resistance, 0.80 megohm; transconductance, 750 "mhos. This is a DISCONTINUED type listed for reference only.
15
DUAL TRIODESHARP-CUTOFF PENTODE
Duodecar type used in a variety
of applications in television receivers
Related type:
employing series-connected heater
6AFll
strings. The high-mu triode unit is used
H
H
in agc-keyer applications, the low-mu
triode unit in sync-separator applications, and the pentode unit in video-amplifier
applications. Outline 12C, OUTLINES SECTION. Heater volts (ac/dc), 14.7;
amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with duodecar type 6AFI1.
15AFll
419
RCA Receiving Tube Manual
Ne
DUAL TRIODE
Duodecar type used as combined
vertical-deflection oscillator and verRelated type:
tical-deflection amplifier in television
6FY7
receivers employing series-connected
heater strings. The high-mu triode unit
H
H
No.1 is used as an oscillator, and the low-mu triode unit No.2 is used as an amplifier. Outline 12D, OUTLINES SECTION. Heater volts (ac/dc), 14.7; amperes,
0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is
identical with duodecar type 6FY7.
15 FY7
II
POWER PENTODE
p
Miniature type used as vertical
deflection-amplifier tube in television
receivers. Outline SE, OUTLINES 6 1
Related type:
6HB6
SECTION. Heater volts (ac/de), 14.7;
amperes, 0.3; warm-up time (average),
K
63
11 seconds. Except for heater ratings, this type is identical with miniature type 6HB6.
15HB6
HIGH-MU TRIODEBEAM POWER TUBE
1/
N ovar type used in combined vertical-deflection-oscillator and verticaldeflection-amplifier applications in
black-and-white television receivers
having low-voltage "B" supplies and
KT
Gr
employing series-connected heater strings. Outline 10C, OUTLINES SECTION.
Tube requires novar nine-contact socket and may be mounted in any position.
15 KY 8
HEATER VOLTAGE (AC jnc).
HEATER CURRENT .. '
.................... .
. .......... .
HEATER WARM-UP TIME (Average). . .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Triode Unit:
Grid to Plate .....
Grid to Cathode and Heater .. .
Plate to Cathode and Heater .. .
Pentode Unit:
Grid No.1 to Plate. . .
. ........ .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 .. .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ........ .
15
0.45
10
volts
ampere
seconds
0.44
15
7
pf
pf
pf
0.048
2.6
0.28
pf
pf
pf
CLASS Al AMPLIFIER
Triode Unit Beam Power Unit
Characteristics:
250
50
135
120
Plate Vol tage ...
Grid-No.2 (Screen-Grid) Voltage.
120
120
*
-3
o
-10
-10
Grid-No.1 (Control-Grid) Voltage.
64
Amplification Factor ...... .
7
40000
Plate Resistance (Approx.).
18000
1600
8400
Transconductance ...
Plate Current ...
1.4
39
3
Grid-No.2 Current .....
Grid-No.1 Voltage (Approx.) for plate current of 1 rna
-24
volts
volts
volts
ohms
J.Lmhos
rna
rna
volts
VERTICAL·DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, 30-frame system
Triode
Unit
Maximum Ratings, (Design-Maximum Values):
Oscillator
DC PLATE VOLTAGE. . . .
. ......... .
330 max
PEAK POSITIVE-PULSE PLATE VOLTAGE# (Absolute Maximum)
DC GRID-No.2 VOLTAGE ................................ .
420
Beam Power
Unit
Amplifier
300 max
2200tmax
150 max
volts
volt.
volts
----------------- Technical Data ----------------PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE •..•.•••••.•.•..
PEAK CATHODE CURRENT . • • • . . . . . • . . . . . . . . . . . . . . . . . . . . . .
AVERAGE CATHODE CURRENT .•.••..••...•.•.•.•..........
PLATE DISSIPATION ••••••...................•.•.•........
GRII>-No.2 INPUT • • • • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . •
PEAK HEATER-CATHODE VOLTAGE:
-400 max
77 max
22 max
1.5 max
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
200 max
200,"",=
-250
200
60
12
1.9
max
max
rna"
max
max
volts
rna
ma
watts
watts
200 m=
200-max
volts
volts
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
2.2 max megohms
2.2 max
For grid-resistor-bias operation ....................... .
* Triode connection, grid No.2 connected to plate at socket.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
.
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system, 15 per cent of one vertical scanning cycle is 2.5 milliseconds.
t Under no conditions should this maximum value be exceeded.
- The de component must not exceed 100 volts.
AVERAGE CHARACTERISTICS
BEAM POWER UNIT
TYPE 15Kye
E f =15.0 VOLTS
GRIO-No.2 VOLTS =120
20 0
I
~
/; ,/*"
,,'/*"
0
I'
0
- ----
--
{,
~-
\..~S ECI,·2
~~::.;..;;.;
>b
-
~
~
'-
~
..
.,.,.
--=--J
20ffi
I-
-~ --
-8
I--'
(. r-
r
o
0
::;
2!
-10
:tb
_. _.
ION
d
Eel"
~
-12
-14
0
iE
0
200
100
400
300
'"
SOO
PLATE VOLTS
92CM-1I942T
AVERAGE PLATE CHARACTERISTICS
TRIODE UNIT
TYPE ISKYS
E,=15.0 VOLTS
14
2
0
,0
8
~,>'"
4
/
~V
o
50
V
~/ /
V/ /
V V
..-'
100
/
/ /
/ / I'/
//1 /
150
.../V
200
250
/1-
,"/
V
vy
~...
300
350
400
PLATE VOLTS
92CM-1I944T
421
RCA Receiving Tube Manual
H
DIODE
Miniature type used as booster
diodeinline-time-base circuits oftransformerless television receivers. Outline 9C, OUTLINES SECTION. Tube
requires miniature nine-contact socket
and may be mounted in any position. Heater volts (ac/dc), 16.4; amperes, 0.6.
16AQ3
Maximum Ratings, (Design-Center Values):
SUPPLY VOLTAGE
at zero current ...... .
SUPJ>LY VOLTAGE . . . . . . . . . . . . . . . . .
PEAK PLATE CURRENT . . . . . . . . . . . . . . . . . . . . .
AVERAGE PLATE CURRENT.......
. .......................... .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . .
PEAK NEGATIVE-PULSE PLATE VOLTAGE- ..
PEAK HEATER-CATHODE VOLTAGE:
550 max
250 max
550 max
220 max
5 max
-·6000-max
volts
volts
rna
rna
watts
volts
Heater negative with respect to cathode.. . . . . .
6600·max
volts
Heater positive with respect to cathode. , ...
6600-max
volts
• Under no conditions should an absolute maximum value of 7500 volts be exceeded.
• The pulse duration must not exceed 22 per cent of a cycle, or a maximum of 18 microseconds.
Ie
K
Ie
HALF-WAVE VACUUM RECTIFIER p 5
4
Duodecar type used as damper
tube in horizontal-deflection circuits
of television receivers employing seriesRelated types:
6AX3,12AX3
connected heater strings. Outline 12C,
H
OUTLINES SECTION. Heater volts
(ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for
heater ratings, this type is identical with duodecar type 6AX3.
17AX3
17AX4GT HALF-WAVE VACUUM RECTIFIER
octal types used as damper
17AX4GTA tubesGlass
in horizontal deflection circuits of
Related types:
6AX4GT,6AX4GTI,
12AX4GTA, 12AX4GTB,
$
p
K 3
2
7
television receivers employing seriesIe
H
connected heater strings. Outline 14C,
I
8
25AX4GT
OUTLINES SECTION. Heater volts
Ie
H
(ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater
ratings, these types are identical with glass octal types 6AX4-GT and 6AX4-GTB,
respectively.
H
HALF-WAVE VACUUM RECTIFIER
N ovar type used as damper tube in
horizontal-deflection circuits of blackRelated types:
and-white television receivers employ6AY3,12AY3
ing series-connected heater strings.
Ie
Outline 17A, OUTLINES SECTION.
Heater volts (ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11
Except for heater ratings, this type is identical with novar type 6A Y3.
17A Y3
HALF-WAVE VACUUM RECTIFIER
N ovar type used as dam per tube in
horizontal-deflection circuits of blackRelated types:
and-white television receivers employ61H3, 22BH3
ing series-connected heater strings.
Outline 17 A, OUTLINES SECTION.
Heater volts Cae/de), 17.0; amperes, 0.6; warm-up time (average), 11 seconds.
Except for heater ratings, this type is identical with novar type 6BH3.
178 H 3
422
========= Technical Data =========
Nc~G!
BEAM POWER TUBE
p
5"1
Glass octal type used as horizon_17BQ6GTB
tal deflection amplifier in television
Related typel:
H 2
7 H
•
I'
.
t d 6BQ6GTB/6CU6, 12BQ6·
receivers emp oymg senes-connec e GTB/12CU6, 25BQ6GTB/
I
8
heater strings. Outline 15C, OUT25CU6
NC,,~
LINES SECTION. Heater volts (ac/
dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater
ratings, this type is identical with glass octal type 6BQ6-GTB/6CU6.
3
L---
---
H
HALF-WAVEVACUUM RECTIFIER
Novar type used as damper tube in
horizontal-deflection circuits of blackIC
and-white television receivers employRelated Iype':
ing series-connected heater strings.
6B53,12B53
IC
K
Outline 10D, OUTLINES SECTION.
Heater volts (ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with novar type 6BS3.
17B53
SHARP-CUTOFF DUAL TETRODE
Miniature type used as vhf rf-amplifier and autodyne mixer tube. OutIine8B, OUTLINES SECTION. Heater volts (ac/dc), 16.8; amperes, 0.15.
Except for heater ratings, this type
is identical with miniature type 6C9.
~
~4
5 "I
H 3
b
"z
17C9
Relaled type:
6C9
BEAM POWER TUBE
Miniature type used in the audio
output stage of television receivers em"I
P
ployingseries-connectedheaterstrings.
Relaled Iype.:
I
Outline 7C, OUTLINES SECTION.
6CU5,12CU5/12C5
~3
Heater volts (ac/dc), 16.8; amperes,
0.45; warm-up time (averag~), 11 seconds. Except for heater ratings, this type is
identical with miniature type 6CU5.
2
$
17CU 5
7
p
HALF-WA VE VACUUM RECTIFIER.
K 3
Glass octal type used as damper
tube in horizontal-deflection circuits
Ie
H
of television receivers employing seriesRelated type: .
I
8
connected heater strings. Outline 14C,
6DA4
Ie
H
OUTLINES SECTION. Heater volts
(ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for
heater ratings, this type is identical with glass octal type 6DA4.
2
7
1704
423
RCA Receiving Tube AIanual
HALF-WAVE VACUUM RECTIFIER
$
p
K
3
Glass octal type used as damper
tube in horizontal-deflection circuits of
2
7
television receivers employing seriesRelated types:
Ie
e
H
connected heater strings. Outline 14F,
6DE4,22DE4
H
OUTLINES SECTION. Heater volts
(ac/dc), 17; amperes, 0.6; warm-up time (average), 11 seconds. Except for heater
ratings, this type js identical with glass octal type 6DE4.
17DE4
p
HALF-WAVE VACUUM RECTIFIER
$
K 3
Glass octal type used as damper
tube in horizontal-deflection circuits of
2
7
television receivers employing seriesRelated types:
Ie
a
H
6DM4,12DM4
connected heater strings. Outline 14F,
H
OUTLINES SECTION. Heater volts
(ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for
heater ratings, this type is identical with gla3s octal type 6DM 4.
17DM4
17DQ6A
·17DQ6B
BEAM POWER TUBE
NC~"!
~ "I
p
Glass octal types used as horizon3
tal deflection amplifier in television
H 2
-7 H
receivers employing series-connected
heater strings. Outline 21, OUTLINES
N~
aK
SECTION. Heater volts (ac/dc), 16.8;
GJ
amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings,
these types are identical with glass octal types 6DQ6-A and 6DQ6-B.
Related types:
6DQ6A, 6DQ68,
12DQ6A, I2DQ68
Ie
BEAM POWER TUBE
. Duodecar type used as horizontaldeflection-amplifier tube in television
Related types:
receivers employing series-connected
6GES, 12GES
. heater string3. Outline 20, OUTLINES
SECTION. Heater volts (ac/dc), 16.8;
H
H
amperes, 0.45; warm-up time (average), 11 seconds: Except for heater ratings, this
type is identical with duodecar type 6GE5.
17GES
H
BEAM POWER TUBE
N ovar type used in horizontal-deflection-amplifier circuits of television
,e
receivers employing series-connected
Related types:
6GJS, 12GJ5
heaterstrings.Outline18A,OUTLINES
SECTION. Tube requires novar ninecontact socket and may be operated in any position. Heater volts (ac/dc), 16.8;
amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings,
this type is identical with type 6GJ5.
17GJS
H
BEAM POWER TUBE
17GTS
Related 'ypes:
6GT5,12GT5
424
N ovar type used in horizontal-deflection-amplifier circuits of television
receivers employing series-connected
heater strings. Outlines 17 A, OUTLINES SECTION. Tube requires no-
========= Technical Data =========
var nine-contact socket and may be operated in any position. Heater volts (ac/de),
16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings,
this tube is identical with novar type 6GT5.
BEAM POWER TUBE
Duodecar type used as horizontaldeflection-amplifier tube in television
receivers employing series-connected
Related type:
heater strings. Outline 16C, OUT6GV5
H
H
LINES SECTION. Heater volts (ac/
dc), 16.8; amperes, 0.45.; warm-up time (average), 11 seconds. Except for heater
ratings, this type is identical with duo de car type 6GV5.
17G V 5
~
G!
P
SGI
BEAM POWER TUBE
Glass octal type used in horizontal-deflection-amplifier circuits of highefficiency deflection circuits of teleRelated types:
6GW6.12GW6
I
8
vision receivers employing series-conNC
l3
nectedheaterstrings.Outline21,OUTLINES SECTION. Tube requires octal socket and may be operated in any position. Heater volts (ac/dc), 16.8; amperes,0.45; warm-up time (average), 11
seconds. Except for heater ratings, this type is identical with glass octal type 6G W6.
NHC 3
2
:::
7 H
17GW6
BEAM POWER TUBE
N ovar type used as high-efficiency
.horizontal-deflection-amplifier tube in
television receivers employing seriesRelated types:
I
connected. heater strings. Outline 18A,
6JB6.12JB6
G2
OUTLINES SECTION. Heater volts
(ac/dc), 16.8; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater
ratings, this type is identical with novar type 6JB6.
17J86
·MEDIUM-MU TRIODEPOWER PENTODE
Duodecar type used as combined
vertical-deflection-oscillator and vertical-deflection-amplifier tube in television receivers employing series-conH
H
nected heater strings. Outline 12B,
OUTLINES SECTION. Tube requires duodecar twelve-contact socket and may be
mounted in any position. Heater volts (acjdc), 16.8; amperes, 0.45; warm-up time
(average), 11 seconds.
17JZ8
CLASS Ai AMPLIFIER
Triode
Unit
Characteristics:
Plate Voltage ....
Grid-No.2 (Screen-Grid) Voltage ... .
Grid-No.1 (Control-Grid) Voltage .. .
150
AmplificatiQn Factor ......... .
Plate Resistance (Approx.) ... .
Transconductance ..
Plate Current. . . . . . . . . .
..............
. ...........
Grid-No.2 Current .....................................
Grid-No.1 Voltage (Approx.) for plate current of 100 "a .....
Grid-No.1 Voltage (Approx.) for plate current of 10 "a ......
.
.
.
.
-5
21.5
11300
1900
3.3
-10
Pentade
Unit
120
110
-8
volts
volts
volts
- 11700
7100
46
174
-25
ohms
pmhos
rna
rna
volts
volts
45
110
0
-
122-
425
RCA Receiving Tube Manual
VERTICAL-DEFLECTION OSCILLATOR AND AMPLIFIER
For operation in a 525-line, SO-frame system
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE.
PEAK POSITIVE-PULSE PLATE VOLTAGE# .....
GRID-No.2 VOLTAGE ..
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE.
PEAK CATHODE CURRENT .....
AVERAGE CATHODE C.URRENT ..
PLATE DISSIPATION t ..... .
GRID-No.2 INPUT .... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode.
Heater positive with respect to cathode ....
Triode
Pentode
Unit
Oscillator
250 max
Unit
Amplifier
250 max
2000 max
200 max
-150 max
245 max
1 max
7 max
1.8 max
volts
volts
volts
volts
rna
rna
watts
watts
200 max
200-max
2QO max
200·max
volts
volts
-400 max
70 max
20 max
70 max
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
1 max
1 max megohm
For fixed-bias operation.
2 2 max megohms
For cathode-bias operation ..
2.2 max
• This value may be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
# The duration of the voltage pulse must not exceed 15 per cent of one vertical scanning cycle. In a
525-line, 30-frame system', 15 per cent of one vertical scanning cycle is' 2.5 milliseconds.
t An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
• The de component must not exceed 100 volts.
HALF-WAVE VACUUM RECTIFIER
H
Miniature type used as damper tube in
horizontal-deflection circuits of television rep
Ie
cei vers employing series-connected heater strings.
Outline SD, OUTLINES SECTION, Tube requires miniature nine-contact socket and may
be mounted in any position. Socket terminals 2,
6, 7, and 9 should not be used as tie points. It is
especially important that this tube, like other
power-handling tubes, be adequately ventilated.
Heater volts (ae Ide), 17.5; amperes, 0.3; warm-up time (average), 11 seconds. Maximum ratings for
damper service (for operation in a 525-line, 3D-frame system): peak inverse plate volts, 2000 max; peak
plate rna., 450 max; de plate rna., 75 max; plate dissipation, 3 max watts; peak heater-cathode volts;
heater negative with respect to cathode, 2000 max (the dc component must not exceed 500 volts);
heater positive with respect to cathode, 200 max (the dc component must not exceed 100 volts). This
type is used principally for renewal purposes.
17H3
BEAM POWER TUBE
p
~
---
Glass octal type used as horizontal-deflection-amplifier tube in television receivers employing series-connected heater strings. Outline
3
::. :
14E, OUTLINES SECTION. Tube requires
octal socket and may be operated in any position.
H 2
Heater volts (ae/dc), lS.5; amperes, 0.3; warmup time (average), 11 seconds. Characteristics
I
as class AI amplifier: plate volts, 200; grid-No.2
GI
volts, 125; grid-No.1 volts, -17; plate rna., 40;
grid-No.2 rna., 1.1; transconductance, 4800 .umhos; plate resistance (approx.), 27000 ohms.
~3.
l8AS
7 H
8
G2
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a S2S-line, 30-frame system
Maximum Ratings, (Design-Maximum Values):
DC PLATE VOLTAGE .................. .
PEAK POSITIVE-PULSE PLATE VOLTAGE# ..... .
PEAK NEGATIVE-PULSE PLATE VOLTAGE.
DC GRID-No.2 (SCREEN-GRID) VOLTAGE.
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE.
PEAK CATHODE CURRENT ............................... .
AVERAGE CATHODE CURRENT ............................ .
GRID-No.2 INPUT .............. .
PLATE DISSIPATION .............................................. .
426
350 max
3000 max
-600 max
160 max
-250 max
310 max
90 max
2.5 max
9 max
volts
volts
volts
volts
volts
rna
rna
watts
watts
Technical Data
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
200 max
ZOO-max
190 max
volts
volts
°C
Maximum Circuit Value:
Grid-No.I-Circuit Resistance:
For grid-resistor-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max megohm
# The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
o Under no circumstances should this absolute value be exceeded.
• An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
- The de component must not exceed 100 volts.
H4
~
sP
14
(;2
3
b
REMOTE-CUTOFF PENTODE
Miniature type used as rf- and ifamplifier tube in ac/dc radio receivers.
K
Outline 7B, OUTLINES SECTION.
1
Tube requires miniature seven-contact
(;,
socket and may be mounted in any
position. Heater volts (ac/dc), 18; amperes, 0.1; warm-up time (average), 18FW6-A, 20 seconds.
2
(;3
IS
18FW6
18FW6A
7
CLASS Al AMPLIFIER
Maximum Ratings. (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE ........................... .
GRID-No.2 VOLTAGE ................................................ .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
GRID-No.2 INPUT:
For grid-N 0.2 voltages up to 75 volts ............................. .
For grid-No.2 voltages between 75 and 150 volts ................... .
PLATE DISSIPATION ................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
150 max
volts
150 max
volt.
See curve page 70
o max
volts
0.6 max
watt
See curve page 70
2.5 max
watt.
100 max
100 max
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid No.3..............................................
Connected
Grid-No.2 Supply Voltage............................................
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Current.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Current. .................................................
Grid-No.1 Voltage (Approx.) for transconductance of 25I'mhos...........
H~H4
~p
___
&(;2
:::;;:
G4
vol t.
volt.
100
volt.
to cathode at socket
100
volts
68
ohms
0.25
megohm
4400
I'mhos
11
rna
4.4
rna
-20
volt.
PENT AGRID CONVERTER
Miniature type used for converter
applications in ac/dc radio receivers.
K 2
7 G3
Outline 7B, OUTLINES SECTION.
G~
Tube requires miniature seven-con1
GI
tact socket and may be mounted in
any position. Heater volts (ac/dc), 18; amperes, 0.1; warm-up time (average),
1BFX6-A, 20 seconds.
CONVERTER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRIOS-No.2-AND-No.4 (SCREEN-GRID) SUPPLY VOLTAGE ................. .
GRIOS-No.2-AND-No.4 VOLTAGE ...................................... .
GRIOS-No.2-AND-No.4 INPUT ........................................ .
18FX6
18FX6A
150 max
150 max
110 max
1.2 max
volts
volts
volts
watts
427
RCA Receiving Tube Manual
PLATE DISSIPATION . • . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
1 max
watt
Heater negative with respect to cathode ... ........................ .
Heater positive with respect to cathode ........................... .
100 max
100 max
volts
volts
Typical Operation (Separate Excitation):·
Plate Voltage..................... ...... ..........................
100
volts
Grids-No.2-and-No.4 (Screen-Grid) Voltage..... ............. ...... .....
100
volts
Grid-No.3 (Control-Grid) Voltage.....................................
-1.5
volts
Grid-N 0.1 (Oscillator-Grid) Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20000
ohms
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.4
megohm
Conversion Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
480
pmhos
Grid-No.S Voltage (Approx.) for conversion transconductance of 10 ",mhos
-21
volts
Plate Current.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3
rna
Grids-N 0.2-and-N 0.4 Current. . . . . . . . . . . . . .. . . . .. . . . . . . . . . . .. .. .. .. .. .
6.2
rna
Grid-No.1 Current. . . . . . . . . . . . . . . . . .. . . . . . . . . . .. . . . .. . .. . . . . .. . . . . . .
0.5
rna
Total Cathode Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
rna
Note: The transconductance between grid No.1 and grids No.2 and No.4 connected to plate (not oscillating) is approximately 7000 ",mhos under the following conditions: grids No.1 and No.3 at 0 volts;
grids No.2 and No.4 and plate at 100 volts. Under the same conditions, the plate current is 24 rna., and
the amplification factor is 22.
* The characteristics shown with separate excitation correspond very closely with those obtained in a
self-excited oscillator circuit operating with zero bias.
TWIN DIODE-HIGH-MU TRIODE
Miniature type used for combined
detector, amplifier, and avc tube in
compact ac/dc radio receivers. Outline 7B, OUTLINES SECTION. Tube
requires miniature seven-contact sockGT
et and may be mounted in any position. Heater volts (ac/dc), 18; amperes, 0.1;
warm-up time (average), 18FY6-A, 20 seconds.
18FY6
18FY6A
TRIODE UNIT AS CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
150 max
o max
PLATE VOLTAGE . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . •
GRID VOLTAGE. Positive-bias value . .................................. .
PLATE DISSIPATION . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ... ...... , ................. .
Heater positive with respect to cathode ........................... .
0.5 max
volts
volts
watt
100 max
100 max
volts
volts
Characteristics:
Plate Voltage ...................................................... .
Grid Voltage ...................................................... .
Amplification Factor. . . .
. ............. .
Plate Resistance (Approx.) .......................................... .
Transconductance . ........................ , ................... , .... .
Plate Current ...................................................... .
100
-1
100
77000
1300
0.6
volts
volt
ohms
JJ.mhos
rna
DIODE UNITS (Each Unit)
Maximum Ratings, (Design-Maximum Values):
1 max
PLATE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SHARP-CUTOff PENTODE
18GD6A
Miniature type used in the if, rf,
and converter stages of acjdc AM
radio receivers. Outline 7B, OUTLINES SECTION. Tube requires miniature seven-contact socket and may
be operated in any position.
HEATER VOLTAGE (AC/nc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . .
HEATER CURRENT . . . . . . • . . . . . . . . . . . . . . . . . • . . . . . . . . . . . • . . . . . . . . . . • • . •
WARM-UP TIME (AVERAGE) . . . . . . . . . . . . . . • . . . • . . . . . . . . . . . . . . . • • • . . . . . .
428
rna
H~H4
;
3
G3
2
b
7
,
,S
G2
K
c,
18
0.1
20
volts
ampere
seconds
----------------- Technical Data ----------------DIRECT INTERELECTRODE CAPACITANCES:·
Grid-No.1 to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0085
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield
6.0
Plate to Cathode, Heater, Grid No.2, Grid No.3 and Internal Shield...
5.0
o Values are same without external shield, or with external shield connected to cathode.
pf
pf
pf
CLASS A, AMPLIFIER
Characteristics:
Plate Supply Voltage. . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid No.3 (Suppressor Grid) .............. ' ...................... Connected
Grid-No.2 (Screen-Grid) Voltage......................................
Cathode-Bias Resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid-No.2 Current. . .. ..............................................
Grid-No.1 Voltage (Approx.), for plate current of 10 lOa. . . . . .. . . . . . . . . . . .
100
volts
to cathode at socket
100
volts
150
ohms
0.5
megohm
4300
I'mho.
5
ma
2
ma
-4.7
volts
RF AMPLIFIER AND CONVERTER
Maximum Ratings, (De.ign-Mazimum Values):
PLATE VOLTAGE ...•.................................................
GRID-No.2 SUPPLY VOLTAGE ......................................... .
GRID-No.2 VOLTAGE ................................................ .
PLATE DiSSiPATION ................................................. .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 75 volts ............................. .
For grid-No.2 voltages between 75 and 150 volts ................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
150 maz
volts
150 maz
volts
See curve page 70
2.5maz
watts
0.6 maz
watt
See curve page 70
100 maz
100 maz
volts
volts
HIGH-MU TWIN POWER TRIODE
p
I(
~
3 .
Glass type used in output stage of batteryoperated receivers. Maximum dimensions: overall length, 4-3/16 inches; seated height, 3-9/16
inches; diameter, 1-9/16 inches. Tube requires
six-contact socket. Filament volts (de), 2.0; amperes, 0.26. Except for filament current, this
type is electrically identical with type lJ6-GT.
Type 19 is a DISCONTINUED type listed for
reference only.
HALF-WAVE VACUUM RECTIFIER
19
19AU4
19AU4GTA
Glass octal types used as damper
diode in horizontal-deflection circuits
2
7
Ie
K
of black-and-white television receivers
R.I..... typ.:
I
8
employing series-connected heater
6AU4GTA
I
H
strings. Outline 14F, OUTLINES SECTION. Tubes require octal socket and may be mounted in any position. These
types may be supplied with pin 1 omitted. Socket terminals 1, 2, 4, and 6 should
not be used as tie points. It is especially important that these tubes, like other
power-handling tubes, be adequately ventilated. Heater volts (ac/dc), 18.9; amperes, 0.6; warm-up time (average), 11 seconds. Type 19AU4-GTA is used principally for renewal purposes.
DAMPER SERVICE
For operalion i .. a 5146-li..., SO-frame 8f/alem
•
R'
Max,mum
alongll
19AU4-GTA
19AU4
Design Mazimum Desig.. Ce,,'er
PEAK INVER8111 PLATIII VOLTAGEI. . ........................
4500 maz
45000 ma:r:
volts
PEAle; PLAT. CURRENT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1300 maz
1050 ma:r:
rna
DC PLATlil CUBlJENT.....................................
210 maz
175 max
rna
PLATE DiSSiPATION......................................
6.5 maz
6 maz
watt.
PEAK HBATER-CATHODE VOLTAGE:
Heater negative with respect to cathode. . . . . . . . . • . . . . . .
4500tmaz
4500·tmaz
volts
Heater positive with respect to cathode.. . . . . . . . . . . . . . .
300........
300 ....az
volts
The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525,.!ine, SO'-fn._.IIYateJa. 15 !IV cent of one horizontal scanning cycle is 10 microeeeonds.
o Under ne circumstances iIIouid thlii absolute value be exceeded.
t The dc comPolfent- mM noi:81Ceeed ..9oo volts.
• The dc component must not exceed 100 volts.
*
429
RCA Receiving Tube Manual
BEAM POWER TUBE
19BG6G
19BG6GA
Rel ...d type:
61060
Glass octal types used as output amplifiers
in horizontal deflection circuits of television
equipment of the Htransformerless" type where
high pulse voltages occur during short duty
cycles. Type 19BG6GA, Outline 25A, OUTLINES SECTION. Tubes require octal socket.
Vertical tube mounting is preferred but horizontal operation is permissible if pins No.2 and
No.7 are in vertical plane. Heater volts (ac/de),
18.9; amperes, 0.3. Except for heater rating and interelectrode capacitances, type 19BG6-GA is electrically identical with glass octal type 6BG6-G. Type 19BG6-G is a DISCONTINUED type listed
for reference only. Type 19BG6-GA is used principally for renewal purposes.
MEDIUM-MU TRIODESHARP·CUTOFF TETRO DE
H
Miniature type used as combined
vhf oscillator and mixer in television
!!elated types:
receivers employing series-connected
SClIA,6CL'A
heater strings. OutlineSB, OUTLINES
SECTION. Tube requires miniature
nine-contact socket and may be operated in any position. Heater volts (ac/dc),
1S.9; amperes, 0.15; warm-up time (average), 11 seconds. Except for heater ratings,
this type is identical with miniature type 6CLS-A.
19CL8A
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
7 Kp,C3p
,s
Miniature type used as combined
oscillator and mixer in television receivers employing series-connected
a.I....d typel:
heater strings and using an intermediate
!lEAI,6EA'
frequency in the order of 40 megacycles
per second. Outline SB, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be operated in any position. Heater volts (ac/dc), 1S.9;
amperes, 0.15; warm-up time (average), 11 seconds. Except for heater ratings, this
type is identical with miniature type 6EAS.
19EA8
SEMI REMOTE-CUTOFF PENTODE
H~H4
3
:
b
C2
Miniature type used as if-amplifier
tube in FM receivers employing seriesGJ 2
7 K
connected heater strings. Outline 7B,
aela ..d type:
OUTLINES SECTION. Heater volts'S
,
6HR6
(ac/dc), 1S.9; amperes, 0.15; warm-up
G,
time (average), 17 seconds. Except for heater ratings, this type is identical with
miniature type 6HR6.
19HR6
SHARP-CUTOFF PENTODE
H~H4
:
b C2
Miniature type used as if-amplifier
and limiter tube in FM receivers. Outline 7B, OUTLINES SECTION.
GJ 2
7
Rela..d type:
Heater volts (ac/de), 1S.9; amperes,
IS
I
6H56
G,
0.15; warm-up time (average), 17 sec~nds. Except for heater ratings, this type is identical to miniature type 6HS6.
19H56
430
K
========= Technical Data =========
H
HIGH-MU TRIODE.SHARP-CUTOFF PENTODE
Miniature type used as if-amplifier and af voltage-amplifier tube in
PT
radio· receivers employing series-connected heater strings. Outline SB, OUTLINES SECTION. Tube requires miniature nine-contact. socket and may be mounted in any position. Heater volts
(ac/dc), lS.9; amperes, 0.15.
19HV8
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ....
GRID-No.2 (SCREEN-GRID) SUPPLY VOLTAGE .....
GRID-No.2 VOLTAGE ..
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ...
PLATE DISSIPATION ...
GRID-No.2 INPUT:
For grid-No.2 voltages up to 165 volts .............. .
For grid-No.2 voltages between 165 and 330 volts ..
. PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode.
Heater positive with respect to.cathode.
Triode
Unit
330 max
max
O. 55 max
Pentode
Unit
volts
330 max
volt.
330 max
See curve page 70
volt.
0 max
watts
3 max
watt
O. 55 max
See curve page 70
200 max
200"max
200 max
200"max
volts
volt.
100
125
125
-1
volis
volts
volt
Characteristics:
Plate Voltage.
Grid-No.2 Voltage ... .
Grid-No.1 Voltage ... .
Amplification Factor. ... . ................. .
Plate Resistance (Approx.) .
. ......... .
Transconductance. . .
. ........ .
Plate Current. ...
Grid-No.2 Current .....
Grid-No.1 Voltage (Approx.) for plate current of 50 I'a.
Grid-No.1 Voltage (Approx.) for plate current of 20 I'a ...
-1
70
54000
1300
0.8
200000
6500
12
4
ohms
",mhos
-1.5
-9
rna
rna
volts
volts
. Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-,bias operation ...
For- cathode-bias operation ..... ,
• The de component must not exceed 100 volts.
0.5 max
1 max
25 max megohm
1 max megohm
MEDIUM-MU TWIN TRIODE
Miniature type used for converter service
in ac/dc AM. and FM receivers and as oscillator, amplifier, or mixer in television receivers
of-the "transformerless'~ type.Outline 7B, OUTLINES SECTION. Tube requires miniature
Related types:
seven-contact socket and may be mounted in
5J6,6J6
any position. Heater volts (ac/dc), 18.9; amperes, 0.15. For direct interelectrode capacitances, ratings, and typical operation as a class Al amplifier" and curves, refer to type 6J6. Maximum
ratings and characteristics [or mixer service (each unit): plate volts, 150 (300 max); cathode-bias
resistor, 810· ohms; peak oscillator volts, 3; plate resistance, 10200 ohms; conversion transconductance,
1900 I'mhos; plate rna., 4.8; plate dissipation, 1.5 max watts; peak heater-cathode volts, 90 max. Type
19J6 is used principally [or renewal purposes.
19J6
H
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as FM converter and rf-amplifier tube in radio
receivers. Outline SB, OUTLINES
SECTION. Tube· requires miniature
nine-contact socket and may be mounted in any. position. Heater volts (ac/dc), lS.9; amperes, 0.15.
19JN8
431
RCA Receiving Tube Manual
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Val"es):
PLATE VOLTAGE ............................... .
GRID-No.2 (SCREEN-GRID) SUPPI.Y VOLTAGE ....... .
GRID-No.2 VOLTAGE. . . . . . . . . . . . . .
. ......... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION .................................... .
GRID-No.2 INPUT:
For grid-No.2 voltages up to 150 volts ................ .
For grid-No.2 voltages between 150 and· 300 volts .... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Triode
Unit
300 max
Pentode
Unit
volts
300 max
volts
300 max
See curve page 70
volts
o max
watts
2.5 max
0 max
2.5 max
watt
0.55 max
See curve page 70
200 max
200-max
200 max
ZOO-max·
volts
volts
125
125
125
-1
volts
volts
volt
200000
7500
12
4
-8
ohms
Ilmhos
rna
rna
volts
Characteristics: .
Plate Vol tage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 Voltage ...................................... .
Amplification Factor ............................... .
Plate Resistance (Approx,) .............................. .
Transconductance ......................... , ............ .
Plate Current .......................................... .
Grid-No.2 Current. . . . . .
. ....................... .
Grid-No.1 Voltage (Approx.) for plate current of 10 ,..a ...... .
-1
46
5400
8500
13.5
-8
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
- The de component must not exceed 100 volts.
2.2 max
2.2 max
2.2 max megohms
2.2 max megohms
TRIPLE DIODE-HIGH-MU TRIODE·
19T8
Miniature type used as comhined audio
amplifier, AM detector, and FM detector in
AM/FM receivers of the alc or "transformer"
type. Outline 8B, OUTLINES SECTION.
Tube requires miniature nine-contact socket
and may be mounted in any position. Heater
volts (ae/dc), 18.9; amperes, 0.15. Except for
P03
PT
heater ratings, this type is identical with miniature type 6T8-A. Type 19T8 is used principally for renewal purposes.
Related types:
5T8,6T8A
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used as combined
oscillator and mixer tube in. "translIelated type.:
formerless" AM/FM receivers. Out5X8,6X8
line 8B, OUTLINES SECTION. Tube
requires miniature nine-contact socket
Pp
and may be mounted in any position. Heater volts (ac/dc), 18.9; amperes, 0.15.
Except for heater ratings, this type is identical with miniature type 6X8.
19X8
POWER fRI·ODE
20
432
Glass type used as output amplifier in drybattery-operated receivers. Filament volt. (de),
3.3; amperes, 0.132. Characteristics as class Al
amplifier: plate volts, 135 max; grid volts,
-22.5; plate rna., 6.5; plate resistance, 6300
ohms; amplification factor, 3.3; transcondue..
tance~ 525 "mhos; load resistance, 650{)'ohms;
output mw., 110. This i. a DISCONTINUED
type listed for reference. only.
P~.3<;
~
,.
F
=========- Technical Data =========
H
DIODE- REMOTE-CUTOFF
PENTODE
Miniature type used as combined
if amplifier and AM detector in AM
and AM/FM radio receivers. Outline
Related types:
8D, OUTLINES SECTION. Tube re6EQ7,12EQ7
quires miniature nine-contact socket
and may be operated in any position. Heater volts (ac/dc), 20; amperes, 0.1. Except for heater ratings, this type is identical with miniature type 6EQ7.
20EQ7
HIGH-MU TWIN TRIODE
Miniature type used in high-gain,
resistance-coupled, low-level audio amH
plifiers operating at low-signal levels,
such as preamplifiers for stereo phonoKTI
graphs. Outline 8B, OUTLINES SECTION. For typical operation as resistance-coupled amplifier, refer to RESIST ANCECOUPLED AMPLIFIER SECTION. Tube requires miniature nine-contact
socket and may be operated in any position.
20EZ7
HEATER VOLTS (AC/DC) . . . . . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER CURRENT......
. .................................... .
HEATER WARM-UP TIME (AVERAGE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DIRECT INTERELECTRODES CAPACITANCES:o
Unit No.1
Grid to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Grid to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . . .
Plate to Cathode and Heater. . . . . . . . . . . . . . . . . . . . . . . . .
1. 5
1.6
0.2
20
0.1
20
Unit No.2
1.5
1.6
0.3
volts
ampere
seconds
pf
pf
pf
CLASS Ai AMPLIFIER (Each Unit)
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE . • . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . • . . •
GRID VOLTAGE:
330 max
volts
Negative-bias value .................. , .......................... .
Positive-·bias value ............................................. .
55 max
o max
1.2 max
volts
volts
watts
200 max
200-max
volts
volts
PLATE DISSiPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ..... , ......... , ...... .
AVERAGE PLATE CHARACTERISTICS
~,1
TYPE 20EZ1
E f c 20 VOLTS
;if
3
2t--
'
~
i/I
~
II II II II ~
I;.
/ / L I / ! / / /t7 'I .,
I
"y
V
/
.,"1
1.
.,.
1/ II / / / / / / 7'
V/ [/ V ~ ~ v: ~ 0 ~
I
100
zoo
300
400
PLATE VOlTS
::
--
~.,
o
0
....
500
433
=====;;;;;;;;;;;;;. RCA Receiving Tube Manual
.' Clraracteristics:
Plate Voltage. . . . . . . . . . . . ... . . . . . . . . . . . . . . . . .. . . . . . . . . . . .
Grid Voltage. . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Amplification Factor... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Plate Resistance (Approx.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transconductance. . .. . .. . .. . .. . . . . .. . .. .. .. . . . . . . .. . . .. .
Plate Current.. . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . . . . . . .
o Without external shield.
• The dc component must not exceed 100 volts.
100
-1
100
80000
1250
0.5
250
-2
100
62500
1600
1.2
BEAM POWER TUBE
K
volts
volts
ohms
I'mhos
ma
~p
~GI
3
. Glass octal type used as horizon- G3
:::
tal~deflection amplifier in television re--Related type:
ceivers employing series-connected . Ii 2
.'
7 H
. 6EX6
heater strings. Outline 25A, OUT8
LINES SECTION. Tubes requires ocG2
tal socket and should be operated vertically (base down or up) or horizontally with
pins2·and 7 in a vertical plane. Heater volts (ac/dc), 21-5; amperes; warm-up time
(average), 11 ·seconds. Except for heater ratings, this. tube is identical' with glass
octal type 6EX6.
Ne
Ga
.21.EX6
.
'BEAMPOWER
.'. ·21 GY5
7
TUBE
Duodecar type used as horizontal-
' deflection-amplifier tube in television
receivers employing series-connected
. heater strings. Outline 16C, OUTLINES SECTION. Tube requires duo.decar twelve-contact sO'cket and may be mounted in any position .
.(ac/dc), 21; amperes, O.45;.warm-up time (average), 11 seconds.
CLASS A, AMPLIFIER
Characteristics:
Plate Voltage ........................................... .
volts
60
130
130
130
. Grid-No.2 .(Screen-Grid) Voltage ......................... .
volts
Grid-No.1 (Control-Grid) Voltage ........................ .
-20
volts
o
Triode Amplification Factor* ............................ .
4.7
Plate Resistance (Approx.) ................................ .
11000
ohms
Transconductance ............................ , .......... .
9100
I'mhos
Plate Current .................................. : ....... .
50
ma
ma
Grid-No.2 Current ...................................... .
1. 75
Grid-No.1 Voltage (Approx.) for plate current of 1 mao ..... .
-33
voits
* Triode connection, grid No.2 connected to plate.
• This v8'lue can .be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
HORIZONTAL. DEFLECTION AMPLIFIER
For ope.ration in a 5115-line, 30-frame BIIBlem
Maximum Ratings, (Design-Maximum ValueB):
DC PLATE SUPPLY VOLTAGE ......................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE# .............................. .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ............................... .
GRID-No.2 VOLTAGE ................................................ .
PEAK NEGATIVE-PULSE· GRID-No.1 VOLTAGE ............................ .
DC GRID-No.1 VOLTAGE ............................................ .
PEAK. CATHODE CURRENT ............................................ .
·AVERAGE CATHODE CURRENT ......................................... .
PLATE DISSIPATIONt ................................................ .
. GRID-No.2.INPUT .................................................. .
PEAK HIilATER-CATHODE VOLTAGE:
Heater negative with respect to' cathode ........................... .
Heater positive with respect to cathode .......... , ................ .
BULB TEMPERATURE (At hottest point) ................................ .
434
770 Inax
6500 Inax
-1500 max
220 max
-330 max
-55 ·max
800 max
280 max
18 max
3.5 max
200 max
200·max
220 max
volts
volts·
volts
volts
'volts
volts
rna
ma
watts
watts
volts
volts
·C
========= Technical Data =========
Maximum Circuit Values:
Grid-No.1-Circuit Resistance ..................................... .
1 max megohm
# The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
t An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
• The de component must not exceed 100 volts.
SHARP-CUTOFF TETRODE
~
GI
2
"2
3
I
..
•
r
Glass type used as rf amplifier in dry-hattery-operated receivers. Maximum over-all
length, 5-1/32 inches; maximum diameter, 113/16 inches. FIlament volts (dc), 3.3; amperes,
0.132. Characteristics as class Ai amplifier: plate
volts,135max; grid-No.2 (screen-grid) volts, 67.5
max;grid-No.1 volts, -1.5; plate ma., 3.7; gridNo.2 rna., 1.3; plate resistance, 325000 ohms;
transconductance, 500 p.mhoB. This is a DIS·
CONTINUED type listed for reference only.
22
HALF-WAVE VACUUM RECTIFIER
N ovar type used as damper tube in
horizontal deflection circuits of blackand-white television receivers employIe
Related typel:
68H3,178H3
ing series-connected heater strings.
Outline 17A, OUTLINES SECTION.
Heater volts (ac/dc), 22.4; amperes, 0.450; warm-up time (average), 11 seconds.
Except for heater ratings, this type is identical with novar type 6BH3.
22BH3
~
p
"
HALF-WAVE VACUUM RECTIFIER
Glass octal type used as damper
tube in horizontal-deflection circuits of
2
7
black-and-white television receivers
Related type.,
Ie
e
H
employing series-connected heater
6DE4, 17DE4
H
strings.Outline14F,OUTLINESSECTION. Heater volts (ac/de), 22.4; amperes, 0.45; warm-up time (average), 11 seconds. Except for heater ratings, this type is identical with glass octal type 6DE4.
3
22DE4
H
BEAM POWER TUBE
N ovar type used as horizontaldeflection-amplifier tube in low-B+,
GI
Ie
black-and-white television receivers
employing series-connected heater
G2
P
strings. Outline 17A,OUTLINESSECTION. Tube requires novar nine-contact socket and may be mounted in any position.
22JG6
HEATER VOLTAGE (AC ioc) ........................................... .
HEATER CURRENT. .
. ......••.....•..........•....•.•...
HEATER WARM-UP TIME (AV~'RAGE) .................................. .
DIRECT INTERELECTRODE CAI'ACITANCES (Approx.):
Grid No.1 to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. ........ .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ..... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................ .
22
0.45
11
volt.
ampere
seconds
0.7
22
pf
pC
pf
9
CLASS Al AMPLIfiER
TriodePentode
Connection Connection
Plate Voltage..
. .................. .
50
130
volts
125
Grid No.3 (Suppressor Grid) ............................. .
Connected to cathode at socket
Grid-No.2 (Screen-Grid) Voltage ......................... .
125
125
volt.
Grid-No.1 (Control-Grid) Voltage ........................ .
-20
0 -20
volts
Characteri.tic.:
435
RCA Receiving Tllbe Manllal
AVERAGE PLATE CHARACTERISTICS
10
1/
00
I""
l-00
V
-
--
~~
TYPE 22JG6
Ef= 22.0 VOLTS
GRID NO.3 CONNECTED TO
I
i--~
-- - -
CATHODE AT SOCKET•
GRID -No.1 VOLTS" 0
.ffi.
'>/0\-1SE¢5
GRIO~~
~
.1.92-
~ .....
75
I/~
50
00
I/~
o
100
200
1100
400
500
PLATE VOlTS
92CM-1l923T
4.1
Amplification Factor .•.......................•...........
Plate Resistance (Approx.) .............................. .
- 12000
- 10000
52580
32- 2.5
Transconductance ........... .
Plate Current .•....•....................................
Grid-No.2 Current ..................................... .
Grid-No.1 Voltage (Approx.), for plate current of 1 rna .•....
ohms
~mhos
rna
rna
volt.
-40
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a 5!i!5-line, SO-frame .".tem
Moximum Rolings, (Design-Maximum Values):
DC PLATE SUPPLY VOLTAGE ......................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE D • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • •
PEAK NEGATIVE-PULSE PLATE VOLTAGE ...................... .
DC GRID-No.3 VOLTAGE* •...........................................
DC GRID-No.2 VOLTAGE ...........•.............•...................
DC GRID-No.1 VOLTAGE, Negative-bias value ............•.............
PEAK NEGATIVE-PULSE GRID-No.1 VOLTAGE ........................... .
PEAK CATHODE CURRENT ..................•...............•.•.......
AVERAGE CATHODE CURRENT ........................................ .
PLATE DISSIPATIONt ................................................ .
GRID-No.2 INPUT ...•................................•..............
770
6500
-1500
75
220
-55
-330
950
275
17
3.5
max
max
max
max
max
max
max
max
max
max
max
AVERAGE CHARACTERISTICS
TYPE 22JG6
E f =22.0 VOLTS
GRID No.3 CONNECTED TO CATHODE AT SOCKET.
700 GRID-No.2 VOL rs:: 125
60
P
V l---
V
0
oe
100
V
o
,......
100
1--
~
\
....
-
IC
100
..."'"
G~
~
" --- - -
y
.e..
'>/o\.1~
:.... J...--
0
436
L-- l--
200
80;
w
0:
~
60 :I
-10
":::;
!--
,,!
:I
-15
40",
•
1b
--
3>0
z
-20
I-£"CI-O
400
PLATE VOLTS'
25
20
~
0
500
92CM-1I927T
volt.
volt.
volt.
volt.
volts
volts
volt.
rna
rna
watts
watts
-----------------=
Technical Data
----------------=
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
200 max
200#max
220 max
volts
volts
'C
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
2.2 max megohm.
For grid-N o.l-resistor-bias operation .............................. .
• With gdd No.2 connected to plate at socket.
o This value can be measured by a method invol ving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
o The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
* In horizontal-deflection-amplifier-service, a positive voltage (typical value, 30 volts) may be applied
to grid N 0.& to reduce "snivets" interference, which may occur in both vhf and uhf television receivers.
t An adequate bias resistor or other means is required to protect the tube in the absence of excitation.
# The dc component must not exceed 100 volts.
SHARP·CUTOFF TETRODE
Gz
~
GI
,___
p
2
---
4 k
Glass type used as rf amplifier or biased
detector in ac-operated receivers. Maximum
over-all length, 5-1/32 inches; maximum diameter, 1-13/16 inches. Tube requires five-contact
24A
socket. Heater volts (ac/dc), 2.5; amperes, 1. 75.
Typical operation and maximum ratings as
I
~
class AI amplifier: plate volts, 250 (275 rna,,);
H
H
grid-No.2 volts, 90; grid-No.1 volts, -3; plate resistance, 0.6 megohm; transconductance, 1050 I'mhos; plate rna., 4; grid-No.2 rna., 1.7 rna". This type
is used principally for renewal purposes.
POWER PENTODE
G24
~
SGI
P3
H 2
1 H
I
mum ratings as class A 1 amplifier: plate volts,
25A6
25A6GT
160; grid-No.2 volts, 135; plate dissipation, 5.3
watts; grid-No.2 input, 1.9 watts. These are
DISCONTINUED types listed for reference
only.
8
S'2SA6
NC '2sA6-GT
Metal type 25A6 and glass octal type
25A6-GT used in output stage of ac/de receivers. Outlines 5 and 14C, respectively, OUTLINES SECTION. Tubes require octal socket.
Heater volts (ac/dc), 25; amperes, 0.3. Maxi-
K
G)
RECTIFIER-POWER PENTODE
Glass octal type used as combined halfwave rectifier and power amplifier. Outline 14C,
OUTLINES SECTION. Heater volts (ac/dc),
25; amperes, 0.3. Typical operation of pentode
unit as class Al amplifier: plate volts and gridNo.2 volts, 100 (117 max); grid-No.1 volts, -15;
plate rna., 20.5; grid-No.2 rna., 4; plate resistance, 50000 ohms, transconductance, 1800
"mho.; load resistance, 4500 ohms; output watts, 0.77. Maximum ratings of rectifier unit: peak inverse
plate volts, 350; peak plate rna., 450; dc output rna., 75; peak heater-cathode volts, 175. This i. a
DISCONTINUED type listed for reference only.
25A7GT
p~
___ SG
2
7
H
H
I
Nt
8
K
HIGH-MU POWER TRIODE
Glass (lctal type used in output stage of
ac Idc receivers. Outline 14C, OUTLINES SECTION. Heater volts (ac/dc), 25; amperes, 0.3.
Maximum ratings: plate volts, 180 ma,,; plate
dissipation, 10 ma" watts. This is a DISCONTINUED type listed for reference only.
25AC5GT
437
RCA Receiving Tube Manual
BEAM POWER TUBE
~3*:::5P
Glass octal type used as horizontal-deflection amplifier tube in teleIi 2
7 H
vision receivers employing either transRelated types:
6AV5GA,12AV5GA
former coupling or direct coupling to
I
8
the deflecting yoke. Outline 19B, OUTG,
G2
LINES SECTION. Heater volts (ac/dc), 25; amperes, 0.3. Except for heater ratings, this type is identical with glass octal type 6A V5-GA.
25AV5GA
25AX4GT
HALF-WAVE VACUUM RECTIFIER
~p
Glass octal type used as a damper K 3
Related types:
tube in horizontal deflection circuits
6AX4GT,6AX4GTB,
of television receivers. Outline 14C,
Ie 2
7H
12AX4GTA, 12AX4GTB, OUTLINES SECTION. This type
I
8
17AX4GT, 17AX4GTA
may be supplied with pin No.1 omitIe
H
ted. Heater volts (ac/dc), 25; amperes, 0.3. Except for heater ratings, this type is
identical with glass octal type 6AX4-GT.
DIRECT-COUPLED POWER AMPLIFIER
2585
Glass type used as class Al power amplifier.
One triode, the driver, is directly connected
within the tube to the second, or output, triode.
Heater volts (ac/dc), 25; amperes, 0.3. Maximum ratings and characteristics are the same as
for type 25N6-G. Type 25B5 is' a DISCONTINUED type listed for reference only.
TRIODE-PENTODE
Glass octal type used as amplifier. Highmu triode unit and remote-cutoff pentode unit
are independent. Outline 14C, OUTLlNESSECTION. Heater volts (ac/de), 25; amperes, 0.15.
Typical operation of pentode unit as class A I
amplifier: plate and grid-No.2 volts, 100; gridNo.1 volts, -3; plate ma., 7.6; grid-No.2 rna., 2;
Kp I
plate resistance, 185000 ohms; transconducG3p
tance, 2000 ).Imhos. Triode unit: plate volts, 100; grid volts, -1; plate rna., 0.6; amplification factor, 112;
plate resistance, 75000; transconductance, 1500 ).Imhos. This is a DISCONTINUED type listed for
reference only ~
25 B8GT
POWER PENTODE
2586G
Glass octal type used in output stage of
ac/dc receivers. Outline 26, OUTLINES SECTION. Heater volts (ac/dc), 25; amperes, 0.3.
Typical operation as class Al amplifier: plate
volts,200 max; grid-No.2 volts, 135 max; gridNo.1 volts, -23; plate rna., 62; grid-No.2 rna.,
1.8; plate resistan'ce, 18000 ohms; transconductance, 5000 ).Imhos; load resistance, 2500
ohms; output watts, 7.1. This is a DISCONTINUED type listed for reference only.
<;2
~
GI
..
~
I
6
P3
H
2
1
~
N(;
<:3
BEAM POWER TUBE
25BK5
Related types:
6BK5, 12BK5
438
Miniature type used in audio output stages of television and radio receivers. Also used as video amplifier.
Outline 8D, OUTLINES SECTION,
Heater volts (ac/dc), 25; amperes, 0.3.
Except for heater rating, this type is
identical with miniature type 6BK5.
H
H
Technical Data
25BQ6GT
BEAM POWER TUBE
Glass octal types used as horizontal deflection amplifiers in circuits
television equipment. Outline 15C,
OUTLINES SECTION. These types
may be supplied with pin No.1 omitted.
Related types:
Tubes require octal socket and may be 6BQ6GTB/6CU6, 12BQ6.
mounted in any position. Heater volts GTB/12CU6,17BQ6GTB
(acldc), 25; amperes, 0.3. Except for heater rating, these types are identical with
glass octal types 6BQ6-GT and 6BQ6-GTB/6CU6, respectively. Type 25BQ6-GT
is a DISCONTINUED type listed for reference only.
of25BQ6GTB
/25CU6
BEAM POWER TUBE
Miniature type used in the audio
output stage of radio receivers. Because of its high power sensitivity and
Related type:
high efficiency at low plate and screen50C5
1'3
grid voltages, it is capable of providing a relatively high power output. Outline 7C, OUTLINES SECTION. Tube
requires miniature seven-contact socket and may be .mounted in any position.
Heater volts (ac/dc), 25; amperes, 0.3. Except for heater ratings, this type is
identical with miniature type 50C5.
25C5
24
~
sG,
BEAM POWER TUBE
P3
2
H
7
,
NC
*
H
4
5
2
25C6G
BEAM POWER TUBE
G,
H 3
G,
H
8 K
G3
Glass octal type used as output amplifier.
Outline 26, OUTLINES SECTION. Heater
volts (ac/dcl, 25; amperes, 0.3. Refer to type
6Y6·G for typical operation as a class Al am·
plifier. Type 25C6·G· is a DISCONTINUED
type listed for reference only.
z
b G
7
P
I
K
G3
Miniature type used in audio-output stage of radio and television receivers. Outline 7C, OUTLINES SECTION. Heater volts (ac/dc), 25; amperes, 0.3. Except for heater ratings,
this type is identical with miniature
type 12CA5.
25CA5
Related type.:
6CA5,12CA5
P5GI
~
K 3
G3
BEAM POWER TUBE
__ _
25CD6GA
Glass octal types used as horizontal deflection amplifiers in teleK 2
7 H
vision receivers employing seriesRelated type:
6CD6GA
connected heater strings. Type25CD6I
8
NC
G2
GB, Outline 25A, OUTLINES SECTION. Heater volts ~ac/ dc), 25; amperes, 0.6; warm-up time (average), 11 seconds.
Except for heater ratings, these types are identical with glass octal types 6CD6-G
and 6CD6-GA, respectively. Type 25CD6-GA is a DISCONTINUED type listed
for reference only.
---
25CD6GB
Refer to type 25BQ6GTB /25CU6
25CU6
439
RCA Receiving Tithe Manltal
BEAM POWER TUBE
Glass octal type used as horizontal deflection amplifier in television
receivers employing series-connected
heater strings. Outline, 25A, OUTLINES SECTION. Tube requires
(;2
octal socket. Vertical tube mounting is preferred but horizontal operation is permissible if pins 1 and 3 are in vertical plane.
25DN6
25
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
0.6
HEATER WARM-UP TIME (Average) .................................. .
11
PLATE RESISTANCE (Approx.)t ....................................... .
4000
9000
TRANSCONDUCTANCEt ................................................ .
4.35
Mu-FACTOR,t Grid No.2 to Grid No.1 .........................•........
t For plate and grid-No.2 ·volts, 125; grid-No.1 volts, -18; plate rna., 70; grid-No.2 rna., 6.3.
volts
ampere
seconds
ohms
"mhos
HORIZONTAL DEFLECTION AMPLIFIER
For operation in a 525-line, SO-frame system
Maximum Ratings, (Design-Center Values):
DC PLATE VOLTAGE ................................................. .
PEAK POSITIVE-PULSE PLATE VOLTAGE# (Absolute Maximum) ............ .
PEAK NEGATIVE-PULSE PLATE VOLTAGE ............................... .
DC GRID-No.2 (SCREEN-GRID) VOLTAGE .......................... .
PEAK NEGATIVE-PULSE GRID-No.1 (CONTROL-GRID) VOLTAGE ............. .
PEAK CATHODE CURRENT ......•......................................
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT ................................................... .
PLATE DISSIPATIONt ................................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ......................... .
BULB TEMPERATURE (At hottest point) ................................ .
700 max
6600 D max
-1500 max
175 max
-200 max
700 max
200 max
3 max
15 max
volts
volts
volts
volts
volts
rna
rna
watts
watts
200 max
volts
200-max
volts
225 max
°C
Maximum Circuit Value:
0.47 max megohm
·Grid-No.1-Circuit Resistance ......................................... .
# The duration of the voltage pulse must not exceed 15 per cent 01 one horizontal scanning cycle. In a
525-line. 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
o Under no circumstances should this absolute value be exceeded.
t An adequate bias-resistor or other means is required to protect the tube in the absence of excitation.
• The de component must not exceed 100 volts.
BEAM POWER TUBE
25EC6
Glass octal type used as horizontal deflection amplifier in television receivers employing series-connected
heater strings. Outline 25A, OUTLINES SECTION, except vertical.dimensions are 1/4 inch shorter. Tube
requires octal socket and may be
operated in any position.
HEATER VOLTAGE (AC/DC) ........................................ .
HEATER CURRENT ............................................ .
WARM-UP TIME (AVERAGE) ........................................... .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.3, and Grid No.2 ........... .
Plate to Cathode, Heater, Grid No.3, and Grid No.2 ................ .
25
0.6
11
volts
ampere
seconds
0.6
24
10
pi
pi
pi
135
135
-22.5
3.8
volts
volts
volts
CLASS Al AMPLIFIER
Charaderistics:
Plate Voltage ........................................... .
Grid-No.2 (Screen-Grid) Voltage ......................... .
Grid-No.1 (Control-Grid) Voltage ........................ .
Triode Amplification Factor ............................. .
440
60
135
o
;;;;;;;;;--;;;;;;;;;;----------= Technical Data ----=======
Plate Resistance (Approx.) .............................. .
Transconductance . ...................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Grid-No;1 Voltage (Approx.) for plate current of 1 ma ...... .
4700
7500
70
4. 6
-42
ohms
"mhos
rna
rna
volts
HORIZONTAL-DEFLECTION AMPLIFIER
For operation in a 5115-line, 30-!rame "llstem
Maximum Ratings, (Design-Maximum Values):
DC PLATE SUPPLY VOLTAGE ......................................... .
PEAK POSITIVE-PULSE PLATE VOLTAGE" .............................. .
PEAK NEGATIVE-PULSE PLATE VOLTAGE .............................. .
DC GRID-No.2 VOLTAGE ............................................ .
PEAK NEGATIVE-PULSE GRID-No.1 VOI.TAGE ........................... .
PEAK CATHODE CURRENT ........................................... .
AVERAGE CATHODE CURRENT ........................................ .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION" ................................................ .
P.EAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
700 max
7000 max
-1500 max
175 max
-300 max
700 max
200 max
4 max
10 max
200 max
200*max
225 max
volts
volts
volts
volt.
volts
rna
ma
watts
watts
, volts
volts
·C
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For grid-resistor-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1. 5 max megohms
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
" This rating.is applicable where the duration of the voltage pulse does not exceed 15 per cent of the
horizontal scanning cycle. In a 525-line, 30-frame system, 15 per cent of the horizontal scanning cycle
is 10 microseconds.
" An adequate bias resistor or other means -is required to protect the tube in the absence ,of excitation.
* The de component must not exceed 100 volts.
. POWER PENTODE
Miniature type used in the audio
output stage of radio and television
receivers and in phonographs. Outline
7C, OUTLINES SECTION. Heater
volts (ac/dc), 25; amperes, 0.3. Except
for heater rating, this type is identical
with miniature type 6EH5.
5
H 3
b Gz
~~-
2
7
GI
P
I
G3
Rel.ted type,:
6EH5,12EH5,SOEH5
BEAM POWER TUBE
GI
~
4
2SEHS
.Miniature type used in audio-output stage of, ac/dc radio receivers employingserie8-'connected heater strings.
Outline 7C, OUTLINES SECTION.
Tube requires miniature seven-contact
socket and may be mounted in any
position.
HEATER VOLTAGE (AC Inc) ........................................... .
HEATER CURRENT .................................................. .
HEATER WARM-UP TIME (AVERAGE) .................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... '.
Plate to Cathode, Heater,Grid No.2, and Grid No.8 ............... .
'2SFSA
26
0.15
17
volts
ampere
seconds
0.44
12
8
pf
pf
pf
CLASS A, AMPLIFIER
Maximum Ratings, (Deoign-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ................ .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
160 max
180 max
o max
5.5 max
l.lmax
volts
volts
volts
watts
watts
441
RCA Receiving Tube Manual
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..
Heater ,positive with respect to cathode. '..
BULB TEMPERATURE (At hottest point) ..
200 max
200·max
220 max
volts
volts
°C
Typical Operation and Characteristics:
Plate Voltage ..
Grid-No.2 Voltage ... .
Grid-No.1 Voltage ... .
Peak AF Grid-No.1 Voltage .. .
Plate Resistance (Approx.) ..... .
Transconductance ............ , ..
Zero-Signal Plate Current .. .
Maximum-Signal Plate Current. ..... .
Zero-Signal Grid-No.2 Current ....... .
Maximum-Signal Grid-No.2 Current ... .
Effective Load Resistance ......... .
Tota! Harmonic Distortion ... .
Maximum-Signal Power Output ...
110
110
-7.5
7.5
13000
6400
43
45
3.8
7.3
2500
7
volts
volts
volts
volts
ohms
ILmhos
rna
rna
rna
rna
ohms
per cent
watts
1.5
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias opera tion .
. ........................ .
For cathode-bias operation .... , ........ .
O. 1 max
o.5
megohm
max megohm
110
110
-8
14.4
82
88
7.2
12.5
4500
2.6
2.9
volts
volts
volts
volts
rna
ma
ma
rna
ohms
per cent
watts
PUSH-PULL CLASS AB, AMPLIFIER
Maximum Ratings: (Same as for Closs ABl amplifier)
Typical Operation (Value. are for two tubes):
PIa te Voltage.
. ........ .
Grid-No.2 Voltage....
. ............ .
Grid-No.1 Voltage.....
. ............................ .
Peak AF Grid-No.l-to-Grid-No.l Voltage ..................... .
Zero-Signal Plate Current ........................... : ............... .
Maximum-Signal Plate Curren t ...................................... .
Zero-Signal Grid-No.2 .Current ....................................... .
Maximum-Signal Grid-No.2 Current... ....... ........
. ............ .
Effective Load Resistance (Plate-to-plate) ............. .
Total Harmonic Distortion. . . .
. ............ .
Maximum-Signal Power Output ................ .
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
For fixed-bias operation ....................... .
For cathode-bias operation ...................... .
• The dc component must not exceed 100 volts.
O. 1 max megohm
O. 5 max megohm
AVERAGE CHARACTERISTICS
TYPE 25F5A
Ef"25 VOLTS
GRID-No.2 VOLTS=IIO
I I \.~s~ f G~.\O-~O~
-------
(
V
y
~
I--'"
--
V- ,~
-
~~
f--- ~
-:1-
rI--i--
IO
:CC2
100
15
I-
ECI=O
200
300
400
PLATE VOLTS
442
92CM-1!682T
========= Technical Data
G!
BEAM POWER TUBE
~
5GI
25L6
25L6GT
Metal type 25L6 and glass octal
H 2
--7 H
type 25L6-GT used in output stage
of ac/dc receivers. Outlines 5 and 14C,
Related types:
1
e K
respectively, OUTLINES SECTION.
12L6GT, 50L6GT
N~:~;t:-"T
"3
These tubes require octal sockets and
may be mounted in any position. Type 25L6-GT may be supplied with pin No.1
omitted. Heater volts (ac/dc), 25; amperes, 0.3. For maximum ratings and typical
operation, refer to type 50L6-GT. Refer to miniature type 50C5 for curves, installation, and application information, but take into consideration the differences in
heater ratings. Type 25L6 is used principally for renewal purposes.
p 3
:::
DIRECT-COUPLED TWIN
POWER AMPLIFIER
Glass octal type used as class Al power amplifier. Heater volts (ac/dc), 25; amperes, 0.3.
Characteristics as class At amplifier-input
triode: plate volts, 100 (180 max); grid volts, 0;
peak af grid volts, 29.7; plate rna., 5.8. Output
triode: plate volts, 180 max; plate rna., 46; load
resistance, 4000 ohms; output watts, 3.8. This is
a DISCONTINUED type listed for reference
only.
2SN6G
HALF-WAVE VACUUM RECTIFIER
p
~
K 3
2
7 I
-"H
Ie
I
Ie
e
H
Glass octal type used as damper tube in
magneth:-denection circuits of television receivers. Outline 14C, OUTLINES SECTION. This
type may be supplied with pin No.1 omitted.
Tu;w requires octal socket and may be mounted
in any position. It is especially important that
this tube, like other power-handling tubes, be
adequately ventilated. Heater volts (ac/dc) 25;
amperes, 0.3. This type is used principally for
renewal purposes.
25W4GT
DAMPER SERVICE
Maximum Ratings, (Design-Center Values):
For operation in a 525-line, 3D-frame system
PEAK INVERSE PLATE VOLTAGE# (Absolute Maximum) .................. .
PEAK PLATE CURRENT . . . . . . . . . . . . . . . . . . . . . . . • . • . . . . . . . . . . . . . . . . . . . . .
DC PLATE CURRENT . . . . . . . . . . . . . . . . .
PLATE DiSSiPATION . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
3850-max
750 max
125 max
3.5 max
volts
rna
rna
watts
Heater negative with respect to cathode (Absolute Maximum)......
500-max
volts
Heater positive with respect to cathode. . . . . . . . . . . . . . . . . . . . . . . . .
200"'max
volts
# The duration of the voltage pulse must not exceed 15 per cent of one horizontal scanning cycle. In a
525-line, 30-frame system, 15 per cent of one horizontal scanning cycle is 10 microseconds.
• Under no circumstances should this absolute maximum value be exceeded .
... The de component must not exceed 100 volts.
VACUUM RECTIFIER-DOUBLER
Glass type used as half-wave rectifier or vol tage doubler in ac Ide receivers. Maximum dimensions: over-all length, 4-3 /16 inches; seated
height, 3-9/16 inches; diameter, 1-9/16 inches.
Heater volts (ac /de) , 25; amperes, 0.3. Maximum ratings: peak inverse plate volts, 700; peak
plate rna. per plate, 450; peak heater-cathode
volts, 350; de output rna. per plate, 75. This is a
DISCONTINUED type listed for reference only.
2SYS
443
RCA Receiving Tube Manual
VACUUM RECTIFIER-DOUBLER
25Z5
Glass type used as half-wave rectifier or
voltage doubler in ae/de receivers. Maximum dimensions: over-all length, 4-3/16 inches; seated
height, 3-9/16 inches; diameter, 1-9/16 inches.
Tube requires six-contact socket and may be
mounted in any position. Heater volts (ac /dc),
25; amperes, 0.3. This type is electrically identical with metal type 25Z6. Type 25Z5 is used
principally for renewal purposes.
VACUUM RECTIFIER.-DOUBLER
*
02
3
4
KO,
2
~
Poz
H
I
•
Po,
H
~
KOZ4
sPOI
Metal type 25Z6 and glass octal type 25Z6GT used as half-wave rectifiers or voltagePOz 3
doublers in ae Ide receivers, particularly "transformerless" receivers. Outlines 5 and 14C, respectively, OUTLINES SECTION. Type 25Z6H 2
7
GT may be supplied with pin No.1 omitted.
Tubes require octal socket. Heater volts (ac /dc) ,
25; amperes, 0.3. Maximum ratings for halfKO, H
wave rectifier or voltage-doubler service: peak
inverse plate volts, 700 max; peak plate rna. (per plate), 450 max; dc output rna. (per plate), 75 max;
peak heater-cathode volts, 350 max. Typical operation as half-wave rectifier with filter-input capacitor
of 16 I'f: ac plate-supply volts per plate (rms) , 235; minimum total effective plate-supply impedance per
plate, 100 ohms; de output rna. per plate, 75; dc output volts at input to filter, 255 (at half-load current
of 75 rna.), 200 (at full-load current of 150 rna.); voltage regulation, 55 volts. Typical operation as voltage doubler: ac plate-supply volts per plate (rms), 117; filter-input capacitor, 16 I'f; minimum total effective plate-supply impedance per plate, 30 ohms (half-wave), 15 ohms (full-wave); dc output rna., 75.
Type 25Z6 is a DISCONTINUED type listed for reference only. Type 25Z6-GT is used principally
for renewal purposes.
25Z6
25Z6GT
N~'m:-~T 8
MEDIUM-MU TRIODE
26
Glass type used as rf voltage amplifier in
ae-operated receivers. Outline 27, OUTLINES
SECTION. Tube requires four-contact socket.
Filament volts (ac/dc), 1.5; amperes, 1.05. Typical operation as class At amplifier: plate volts,180
max; grid volts, -14.5, plate rna., 6.2; plate resistance, 7300 ohms; transconductance, 1150
I'mhos; amplification factor, 8.3. This is a DISCONTINUED type listed for reference only.
P~G
~
r
f
LOW-MU TRIODE
27
Glass type used as voltage amplifier or detectorin ac-operated receivers. Tube requires fi vecontact socket. Heater volts (ac/dc), 2.5; amperes, 1.75. Maximum ratings and characteristics as class At amplifier: plate volts, 250 max;
grid volts, -21; amplification factor, 9; plate
resistance, 9250 ohms; transconductance, 975
I'mhos; plate rna., 5.2. This type i. used principally for renewal purposes.
~
MEDIUM-MU TRIODE
30
444
Glass type used as voltage amplifier or detector in battery-operated receivers. Tube requires
four-contact socket. Filament volts (de), 2.0;
amperes, 0.06. Except for interelectrode capacitances, this type is electrically identical with
glass-octal type 1H4-G. Type 30 is a DISCONTINuED type listed for refetence only.
,
~
f
Technical Data
POWER TRIODE
~G
F
Glass type used in output stage of batteryoperated receivers. Tube requires four-contact
socket. Filament volts (de), 2.0; amperes, 0.13.
Typical operation as class Al amplifier: plate
volts, 180 max; grid volts, -30; plate rna., 12.3;
plate resistance, 3600 ohms; amplification factor,
3.8; transconductance, 1050 J.£mhos; load resistance, 5700 ohms; output watts, 0.375. This is a
DISCONTINUED type listed for reference only.
~
F
31
SHARP-CUTOFF TETRODE
~
G'
Glass type u.ed as rf amplifier or biased
detector in battery-operated receivers. Maximum over-all length, 5-1/32 inches; maximum
diameter, 1-13/16 inches. Tube requires fourcontact socket. Filament volts (de), 2.0; amperes,
0.06. Typical operation as class Al amplifier:
plate volts, 180 max; grid-No.2 rna., 0.4 max;
plate resistance, greater than 1 megohm; plate
rna., 1.7; transconductance, 650 p.mhos. This is a
DISCONTINUED type listed for reference only.
G2
2
3
,
..
r
F
H
~
4
H 3
5
G.,
b Ga
2
7
G,
,
P
K
G:s
POWER PENTODE
Miniature type used in audio output stage of compact ac/dc radio receivers. Outline 7C, OUTLINES SECTION. Tube requires miniature sevencontact socket and may be mounted
in any position. Heater volts (ac/dc),
32; amperes, 0.1; warm-up time (average) for type 32ET5A, 20 seconds.
32
32ET5
32ET5A
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE.
. . . . . . . . . . . . . . . . . . . . . . . .................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
GRID-N 0.2 INPUT .................................................. .
. ........................................ .
PLATE DISSIPATiON. . . . .
150
130
1. 2
5.4
max
max
max
max
volts
volts
watt.
watts
200 max
200-max
volt.
volts
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode. . . . .
. ............. .
Typical Operation and Characteristics:
Plate Voltage ...................................................... .
Grid-No.2 Voltage ..... "
.................................. .
Grid-No.1 (Control-Grid) Voltage.
. .............................. .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current. . . . . . .
. ............................. .
Zero-Signal Grid-No.2 Current. .
. ............................. .
Plate Resistance (Approx.) . .
. ............................... .
Transconductance. . . . .
. ............................... .
Load Resistance . . . . . .
. ............................... .
Total Harmonic Distortion.
. ............................... .
Maximum-Signal Power Output ...................................... .
110
110
-7.5
7.5
30
2.8
21500
5500
2800
10
1.2
volts
volts
volts
volts
ma
rna
ohms
IImhos
ohm.
per cent
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
• The de component must not exceed 100 volts.
O. 1 max
O. 5 max
megohm
megohm
445
RCA Receiving Tube Manual
RECTIFIER-BEAM POWER TUBE
Glass octal type used as combined halfwave rectifier and output amplifier in ac/dc
receivers. Outline 15A, OUTLINES SECTION.
Tube requires octal socket. Heater volts (ae/dc),
32.5; amperes, 0.3. Maximum ratings for rectifier unit: ac plate volts (rms), 125; dc output
rna., 60. Typical operation of beam power unit
as class Al amplifier: plate and grid-No.2 volts,
90; grid-No.1 volts, -7; plate rna., 27; grid-No.2 rna., 2; plate resistance, 17000 ohms; transconductance,
4800/Amhos; load resistance, 2600 ohms; maximum-signal output watts, 1.0. This is a DISCONTINUED
type listed for reference only.
32L7GT
POWER PENTODE
p~,~,
---
Glass type used in output stage 01 batteryoperated receivers. Outline 26, OUTLINES
SECTION. Tube requires five-contact socket.
Filament volts (dc), 2.0; amperes, 0.26. Typical
operation as class Al amplifier: plate and gridNo.2 volts,lS0 max; grid-No.1 volts,-18; plate
I
!J Cl
rna., 22; grid-No.2 rna., 5; plate resistance,
F'+
r55000 ohms; transconductance, 1750 /Amhos;
load resistance, 6000 ohms; output watts, 1.4. This is a DISCONTINUED type listed lor reference only.
00,
33
REMOTE-CUTOFF PENTODE
'"
~z
•
Glass type used as rl or il amplifier in bat2
J
tery-operated radio receivers, particularly those
employing ave. Maximum over-all length,
5-1/32 inches; maximum diameter, 1-13/16
inches. Tube requires four-contact socket. Filament volts (de), 2.0; amperes, 0.06. Charactert
4 G3
istics as class Ai amplifier: plate Yolts, 180 max;
r.
Fgrid-No.2 Yolts, 67.5 maxi grid-No.1 volts, -3
min; plate rna., 2.8; grid-No.2 rna., 1.0; plate resistance, 1.0 megohm; transconductance, 620 Jjrnhos.
This is a DISCONTINUED type listed lor reference only.
34
BEAM POWER TUBE
34GDS
34GDSA
Miniature types used in audio output stages of compact acjdc radio receivers. Outline 7C, OUTLINES SECTION. Tubes require miniature sevencontact socket and may be operated
in any position.
HEATER VOLTAGE (AC/DC).
. ........ .
HEATER CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER WARM-UP TIME (AVERAGE) lor 34GD5-A ..
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ....................... ' ........... . ..........
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ..
Plate to Cathode, Heater, Grid No.2, and Grid No.3:
For 34GD5.......
. ......... .
For 34GD5-A ............. .
34
0.1
20
volts
ampere
seconds
0.6
12
pf
pi
6
9
pf
pi
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ..................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ... .
GRID-No.1 (CONTROL-GRID) VOLTAGE:
Negative-bias value ....... .
Positive-bias value ........... .
GRID-No.2 INPUT ...
PLATE DISSIPATION.
. ....
PEAK HEATER-CATHOIJE VOLTAGE:
Heater negative with respect to cathode ...
Heater positive with respect to cathode.
BULB TEMPERATURE (At hottest point):
For 34GD5 .... .
For 34GD5-A ... .
446
150 max
130 max
volts
volts
50 max
o max
1.1 max
5 max
volts
volts
watts
watts
200 max
200·max
volts
volts
180 max
250 max
°C
°C
========= Technical Data
Typical Operation and Characteristics:
Plate Voltage ......................... .
Grid-No.2 Voltage...........
. ............................ .
Grid-No.1 Voltage ................. .
Peak AF Grid-No.1 Voltage ........ .
Zero-Signal Plate Current ............ .
Zero-Signal Grid-No.2 Current .. .
Plate Resistance (Approx.) .. .
Transconductance ......... .
Load Resistance .............. .
Total Harmonic Distortion ........... .
Maximum-Signal Power Output .. .
110
110
-7.5
7.5
35
volts
volts
volts
volts
rna
rna
3
13000
5700
2500
10
ohms
I'mhos
ohms
per cent
watt.
1.4
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation, ....... , ...... .
For cathode-bias operation ........ .
• The de component must not exceed 100 volts.
O. 1 max megohm
O. 5 max megohm
AVERAGE CHARACTERISTICS
~
-
L..--
..-
100
TYPE 34GD5-A
Ef -34 VOLTS
GRIO-NO.~ VOLTS-~...-
-2
..V
....
7
,[7
L-- ~
,~
0
,
/
Y
0
t-
GRIO- NO.1 VOLTS
-6
~V
, ...
V'"
l-- l-~-
V
-8
~
-- ~.!."O
20
G2
P?~~K
4.0
60
-10
-12
-
l:b
o
ECI-- 4
L-- I--
~~ L--
p
I \
J..--
V
,V
0
~
___0
80
100
PLATE VOLTS
- -- -
-14
- 16
120
140
160
92CM-I0179T
REMOTE-CUTOFF TETRO DE
Glass type used as rf or if· amplifier in ac
receivers. Maximum over-all length, 5-1/32
inches; maximum diameter, 1-13/16 inches.
Tube requires five-contact socket. Heater volts
(acldc), 2.5; amperes, 1.75. Characteristics as
class Al amplifier: plate volts, 250 (275 max);
grid-No.2 volts, 90 max; grid-No.1 volts, -3
H
H
min;. plate rna., 6.5; grid-No.2 rna., 2.5; transconductance, 1050 "mhos. This is a DISCONTINUED type listed for reference only.
~
~
N~
~c
3'
G2..
.
P 2
I
H
8
BS
H
.BEAM POWER TUBE
6
-, GI
7
35
~3
Glass lock-in' type used in output stage of
ac Ide receivers: Outline l3B, OUTLINES SECTION. Tube requires lock-in socket. Heater
volts.(ae/de), 35; amperes, 0.15. For'maximum
ratings.and typical operation; refer to, glass octal
type 35L6-GT. Type 35A5 is used principally
(or- renewa,l purposes.
3SAS
447
RCA Receiving Tltbe Manltal
======
BEAM POWER TUBE
Miniature· type used in output
stage of compact, ac/ dc radio receivers.
Because ofits high power sensitivity at
plate and screen-grid voltages available
in ac/dc receivers, it is capable of providing a relatively high power output. Outline 7C, OUTLINES SECTION. Tube
requires miniature seven-contact socket and may be mounted in any position.
Within its maximum ratings, type 35B5 is equivalent in performance to glass-octal
type 35L6-GT, and miniature type 35C5. Refer to type 35C5 for typical operation,
maximum circuit values, installation, application information, and curves.
35 B5
HEATER VOLTAGE (AC/DC) .......................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate .............................................. .
Grid No.1 to. Cathode, Heater, Grid No.2, and Grid No.3 ............ .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................. .
35
0.15
0.6
12
9
volts
ampere..
pC
pC
pC
CLASS Al AMPLIFIER
Ma>
II:
.I:)
OJ
~
t.
,..-
"
t ~~ ,-~--j
,
!..----"
tb
o
"
). ~
2
-'~Ot..T~:2G"'O-""·' ;::::;-
.;;..-
-----
$1)-
1=-=
o
'00
--
- -
i--
-
_2.5
-5.0
... 7.S
•.0
-'0
'2.5- i - .
ECI=+20
I
-- --
EC,I=_'$
1-17.5
+10,
200
PLATE VOLTS
400
300
12CU-6.)12TI
INSTALLATION AND APPLICATION
Type 35C5 requires miniature seven-contact socket and may be mounted in
any position. Outline 7C, OUTLINES SECTION. It is especially important that
this tube, like other power-handling tubes, should be adequately ventilated.
The 35-volt heater is designed to operate under the normal conditions of linevoltage variation without materially affecting the performance or serviceability
of the 35C5. For operation of the 35C5 in series with other types having 0.15ampere rating, the current in the heater circuit should be adjusted to 0.15 ampere
for the normal supply voltage.
HIGH-MU TRIODEPOWER PENTODE
35028
Miniature type used as two-stage
af amplifier where plate supply voltage
is obtained from .single half-wave rectifier connected directly to 120-volt ac
err
PT
line. Outline 8E, OUTLINES SECTION, except maximum vertical dimensions are 1/16 inch greater than shown.
Tube requires miniature nine-contact socket and may be operated in any position.
Heater volts (ac/dc), 35; amperes, 0.15.
CLASS A, AMPLIFIER
Maximum Ratings:
PLATE VOLTAGE ••.••.•.•.........•.•..•..•••.....•.....•
GRID-No.2 (SCREEN-GRID) VOLTAGE . • • . . . . . . . . . . • . . . . . . . . .
CATHODE CURRENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
PLATE DISSIPATION ••...•.•.•...•.••••..•.•••...•••.....•
GRID-No.2 INPUT •••••••••...•..••....•....•.••..•...••.
Triode
Unit
150 max
5 max
0.75 max
Pentode
Unit
150 max
135 max
60 max
6.5max
1.6 max
volts
volts
ma
watts
watts
449
RCA .Receiving Tube Manual
PBAK.HBATER-CATHODB VOLTAGB:
Heater negative with respect to cathode ............... .
Heater positive with respect to cathode ............... .
Triode
Unit
200 max
Pentode
Unit
200 max
200"max
volts
volts
120
145
120
'180
volts
volts
ohms
45
6
7500
2500
2
ma
ma
"hmos
ohms
watts
volts
200~max
T,ypical Operation and Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Cathode-Bias Resistor .................................. .
Amplification Factor .................................... .
Plate Current .......................................... .
Grid-No.2 Current ..................................... .
Transconductance ...................................... .
. Load Resistance ....................................... .
Power Output ......................................... .
Grid Voltage (Approx.), for.plate·current of 20 "a .......... .
1500
100
0.8
1400
-2.5
Maximum Circuit Values:
Grid-No.1-Circuit Resistance ............................ .
• ,The dc component must not exceed 100 volts.
5 max
O. 5 max megohms
POWER PENTODE
Miniature type used in the audio
output stage of radio and television
receivers and in phonographs. This type
has unusually high power sensitivity
and is capable of 'providing relatively
G3
·high.pow.er output at low plate and. screen-grid volta'ges with a low af grid-No.1
driving voltage. Outline 7C, OUTLINES. SECTION. Tube requires miniature
seven-contact socket and may be mounted in any position.
35EH5
HBA'IIBR VOL'!AGB (AC/oo) ........................................... .
HBATER CURRBNT .................................................. .
DIRECT INTERBLECTRODB CAPACITANCBS (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater,. Grid No.2, and Grid No.3 ............... .
35
0.15
0.65
17
9
volts
amperes
pf
pf
pf
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATB VOLTAGE ..................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGB .................................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ............... .
PLATE DISSIPATION ................................................. .
. GRID-No.2 INPUT ..•................................................
150 max
130 max
o max
5 max
1. 75 max
volts
volts
volts
watts
watts
PEAK HEATER-CATIrODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heatsr positive with respect. to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
200 max
200"max
225 max
volts
'volts
·C
Typical Operatian:
Plate Supply Voltage ............................................... .
Grid-No.2 .Supply Voltage ........................................... .
Cathode-Bias Resistor ......•........................................
. Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current .........•..................................
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-N 0.2 Current .......................................•
. Maximum-Signal Grid-No.2 Current ..................................•
Plats Resistance (Approx.) .......................................... .
·,Tral18COnductance .................................................. .
Load Resistance ................................................... .
Total Harmonic Distortion .................. '.' ...................... .
Maximum-Signal Power Output ....... , .............................. .
110
115
62
3
32
32
7.2
12
14000
3000
3000
8
1.2
volt.
volts
ohm.
volts
rna
ma
rna
ma
ohms
"mhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1-Ci.cuit Resistance:
.Fol' fixed-bias operation ........................................ ..
For cathode-bias operation ...................................... .
• The dc component must not exceed 100 volts.
450
0.1 max
O.Smax
megohm
megohm
========= Technical Data =========
In a series-heater circuit of the "de power line" type employing several 0.15ampere types and one or two 35C5s, the heater(s) of the 35C5(s) should be placed
on the positive side of the line. Under these conditions, heater-cathode voltage of
the 35C5 must not exceed the value given under maximum ratings. In a seriesheater circuit of the "universal" type employing rectifier tube 35W4, one or two
35C5s and several 0.15-ampere types, it is recommended that the heater(s) of the
35C5(s) be placed in the circuit so that the higher values of heater-cathode bias
will be impressed on the 35C5(s) rather than on the other 0.15-ampere types.
This is accomplished by arranging the 35C5(s) on the side of the supply line which
is connected to the cathode of the rectifier, i.e., the positive terminal of the rectified voltage supply. Between this side of the line and the 35C5(s), any necessary
auxiliary resistance and the heater of the 35W4 are connected in series.
As a power amplifier (class A,), the 35C5 is recommended for use either singly
or in push-pull combination in the power-output stage of ac/dc receivers. The
operating values shown under typical operation have been determined on the basis
that grid-No.1 current does not flow during any part of the input cycle.
AVERAGE CHARACTERISTICS
TYPE 35EH5
E.-= 35 VOLTS
VOLTS= II~
I- G~ID-NI:2
:::
..
:!i
~
80
GRIO-NSI VOLTS
:;
oJ
~
V
bO
~
1'\
:tz
/
\
I
V
o
rr
E~
Xb
i
40
OJ
-I
V
V
-2
-.
J< I-V '"',too::::
..,/
II:
o
..
~
~
~20
...
~
t
V. . .
c_
'-
l:b
./1/
Go
.~-
.,--
r--r
o
20
~
H4
-4
-, .-
40
60
80
100
PL.ATE VOLTS
CI=O
r'~_._
t-
r-
120
_6
-4
160
:2
BEAM POWER TUBE
Miniature type used in af poweroutput stage of radio receivers. Outline 7C, OUTLINES SECTION.Tube
has heater tap which may be used for
I
K,GlI
operating a 6.3-volt, 150-ma. panel
lamp in equipment using semiconductor rectifiers. For dc output currents greater
than 70 ma., a resistor shunting the panel lamp is required. Tube requires miniature seven-contact socket and may be operated in any position.
H 3
~ 2
.
:::
b HL
35GL6
7 P
Without
Panel
HEATER VOLTAGE (AC/DC):
ENTIRE HEATER (PINS 3 AND 4) , . , ' . ' . , .. , , .. , , , .. , .. .
PANEL LAMP SECTION (PINS 4 AND 6) . . . . , " " . , . , , ... .
HEATER CURRENT:
BETWEEN PINS 3 AND 4 ' , , . , . , ... ' ... , ... , ..... ' ..•..
BETWEEN PINS 3 AND 6 . , .... , .. ' . , . , .. , .. , ...•. , ....
With No.40
Lamp
or 47 Panel
Lamp
35
7
32
5.5
volts
volts
0,15
ampere
0,15
ampere
451
RCA Receiving Tube Manual
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
RMS HEATER-TAP VOLTAGE, when panel lamp fails .................... .
PLATE VOLTAGE ..................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TIilMPERATURE (At hottest point) ............................... .
14 max
150 max
130 ma.,
5.5 max
1.1 max
volts
volts
volts
watts
watt.
200 max
200 max
225 max
volts
volts
·C
Typical Operation and Characteristics.
Plate Voltage ...................................................... .
Grid-No.2 Voltage .•.................................................
Grid-No.1 (Control-Grid) Voltage .................................... .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Plate Reeietance (Approx.) .......................................... .
Transconductance .................................................. .
Load Resistance ..................................................... .
Total Harmonic Distortion .......................................... .
Maximum-8lgnal Power Output ...................................... .
110
110
-7.5
7.5
45
47
3
9
12000
7500
2500
8
1.8
volts
volts
volts
volts
ma
ma
ma
ma
ohms
pmhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-hias operation ......................................... .
For cathode-bias operation ...................................... .
BEAM POWER TUBE
0.1 max megohm
0.5 max megohm·
42
*
Cli
~3
li
Glass octal type used in output
stage of ac/dc radio receivers. Outline HC, OUTLINES SECTION.
H2
7H
Tube requires octal socket and may be
18K
mounted. in any position. This type
NC
3
may be supplied with pin No.1 omitted. Refer to miniature type 35C5 for installation, application information, and curves.
35L6GT
HEATER VOLTAGE (AC/OO) •......••.••......••......•..••.•...••.•••.•
HEATER CURRIilNT ................................................. ..
DIRECT INTERELECTRODE CAPACITANCIIlB (Approx.):
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 .••..........
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ...............•..
35
0.15
volts
ampere
0.6
13
9.5
pf
pf
pf
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Cenler Value.):
PLATE VOLTAGJIl .••.•..•.....••....••.....•....••....••••...........•
200 max
GRID-NO.2 (BCRJIlEN-GRID) VOLTAGE ................................... .
125 max
PLATE DISSIPATION •.....•••.....•...............•..•.••..•..••.•....
8.5 max
GRID-No.2 INPUT .................................................. .
1.0 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
90 max
Heater positive with respect to cathode ....•......•............•••.•
90 max
Typical Operatian:
Fixed Bias Cathode Bia.
Plate Supply Voltage....................................
110
200
Grid-No.2 Supply Voltage. . .............. .................
110
125
Grid-No.1 (Control-Grid) Voltage. . . . .. . .. .............••
-7.5
Cathode-Bias Resistor ..•................................
180
Peak AF Grid-No.1 Voltage ....•...•.•.....•..........•..
7.5
8
Zero-8ignal Plate Current ............................... .
40
43
Maximum-Signal Plate Current .•.........................
41
43
Zer0-8ignal Grid-No.2 Current .....................•.•..•.
3
2
Maximum-8ignal Grid-No.2 Current ...................•...
7
5.5
Plate .Resistance (Approx.) .............................. .
14000
34000
Transconductance ...................................... .
5800
6100
Load Resistance ....•.•.........................•........
2500
5000
Total Harmonic Distortion ...............•...............
10
10
Maximum-Signal Power Output ............•..............
1.5
3.0
volts
volts
watts
watt
volts
volts
volts
volts
volt.
ohms
volts
ma
ma
ma
ma
ohm.
pmhos
ohms
per cent
watts
Maximum Circuit Values.
Grid-No.1-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation .....................•.................
452
0.1 mao:
0.5 mao:
megohm
megohm
========- Technical Data ========-
*
H4
H 3
Ne 2
"
5P
6 HL
7 K
Ne
HALF.WAVEVACUUMRECTIFIER
Miniature type used in power supply of ac/dc receivers. Equivalent in
performance to glass-octal type
35Z5-GT. The heater is provided with
a tap for operation of a panel lamp.
HIllATER VOLTAGE (AO/OO):
*
ENTIRE HIllATER (PINS 3 AND 4). . . • . • . . . . . • . • . • . . . • • •• •
85
PANEL LAMP SECTION (PINS 4 AND 6) ..•••.•••.•.• , • • • • •
7.5
HIllATER CURRENT:
BETWEEN PINS 3 AND 4 ••..•. '.........................
0.15
BETWEEN PINS 3 AND 6 .•.•..••.••.•.•.••••....•••••••
With No.40 or No.47 panel lamp.
* Without panel lamp.
**
35W4
**
32
5.6
volta
volta
0.16
ampere
ampere
HALF-WAVE RECTIFIER
Maximum Ratings, (Deaign-Ma:rimum Value.):
PIllAK INVERSE PLATE VOLTAGE .•.••.•.••...•. '.•..••....•....•.•...•.•
PIllAK PLATE CURRENT .•..•...•.....•...•.•.......•.•..•....••.......
DC OUTPUT CURRENT:
With Panel Lamp and { No Sh.unting ~tor ....•...•....•...•••. ; ..
Shunting Reslator ..••....•...•••.•...••...••
Without Panel Lamp •••••...•••.•••..••..•••..... _•..•...•.......•
PANEL-LAMP-SECTION VOLT4GB (rma):
When Panel Lamp Faila.•..••..•....••••.•••....••.•. '.' •.........•
PEAX III11ATER-CATHODB VOLTAGE:
Heater negative with respect to eathode .••.•.•••.••••.••••..........
Heater positive with respect to cathode .••••••.••.••••.•••...••.•...
360 ma.,
860maz
volta
ma
66 maz
100 maz
110maz
ma
ma
ma
17 maz
volta
360 ma:r
360 maz
volta
volta
INSTALLATION AND APPLICATION
OPERATION CHARACTERISTICS
HALf-WAIiE RECTlfTER
I
TVPE35W4
Ei'=~i~'N1N'l,;r~6~~I~~'~.i')3
&
PL.ATE VOL. TS=1I7RMS
TOTAL. EffECTIVE PL.ATE-SUPPLV
IMPEDANCE=15 OHMS
C=CAPACITOR INPUT TO FIL.TER
~...
ii:
~
!i250
...~
C200
~>
~
150
5 '00
g
1ii!!O: ....
-C'4
......
Tube requires miniature seven-contact
socket and may be mounted in any position.
Outline 7C, OUTLINES SECTION. For
heater considerations, refer to miniature
type,35C5.
With the panel lamp connected as shown
in the diagram, the drop across R and all
heaters (with panel lamp) should equal 117
volts at 0.15 ampere. The shunting resistor
R. is required when dc output current exceeds 60 milliamperes. Values of R. for dc
output currents greater than 60 milliamperes
are given in tabulated data.
f
::!{
....... ..(
DC
50
o
OIJTPUT
25
50
75. 100
L.OAD MIL.LIAMPERE S
12CM-6615Tf
Typical Operation with Pariel Lamp:t
AC P1at;e-Supply Voltage (rma) ••••... " . • . • • • • . . • • • . • 117 117 117 117
Filter-Input Capacitor ......... " ................. : .. •
40
40
40
40
Minimum Total Effective Plate-Supply
..
16
Impedance .......... : . .. . . .. .. . . • . • .. . . . . . . . . . . ..
16
15
16
Panel-Lamp Shunting Resistor ••..•.....•.... '. . . • . . . . . .
800
160 100
90
DC Output Current..................................
60
70
80
t No.40 or No.47 panel lamp used in circuit given below with capacitor-input filter.
volta
pf
ohms
ohma
ma
Typical Operation without. Panel Lamp:
AC Plate-Supply Voltage (rma) ....................................... .
Filter-Input Capacitor ............................... : .............. .
Minimum Total Effective Plate-Supply Impedance .•••.......•....•...•.
DC Output Current ................................................. .
117
40
16
100
volta
pf
ohm.
ma
453
RCA Receivil1g Tube Mal1ual
DC Output Voltage at Input to Filter (Appro".):
At half-load current (50 rna.) ..................................... .
At full-load current (100 rna.) ..................................... .
Voltage Regulation (Appro".):
Half-load to full-load current. . . . . . . . . . . . . . . . . . . . .. . ............. .
135
120
volts
volts
15
volts
Maximum Circuit Values:
Panel-Lamp Shunting Resistor:*
70 rna ................................... .
For dc output current of 80 rna ................................... .
90 rna ................................... .
Required when de output current is greater than 60 milliamperes.
~
*'
HALF-WAVE VACUUM RECTIFIER
35Y4
Glass lock-in type used in power supply
of ac/dc receivers. The heater is provided with
tap for the operation of a panel lamp. Outline
13B, OUTLINES SECTION. Tube requires
lock-in socket. Heater volts (ac Ide), 35; amperes,
0.15. For maximum ratings, refer to glass octal
type 35Z5-GT. For typical operation and
curves, refer to miniature type 35W4. Type
35Y 4 is used principally for renewal purposes.
800 max
400 max
ohm.
ohms
ohms
250 max
~
HL4
,NC
NC 3
6 NC
P 2
7 K
I
H
8
BS
H
HALF-WAVE VACUUM RECTIFIER
35Z3
Glass lock-in type used in power supply of
ac Ide receivers. Outline 13B, OUTLINES SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 35; amperes, 0.15. For maximum
ratings and typical operation, refer to glass
octal type 35Z5-G T without panel lamp. Type
35Z3 is used principally for renewal purposes.
HALF-WAVE VACUUM RECTIFIER
35Z4GT
Glass octal type used in power supply of
ac Ide receivers. Outline 14C, OUTLINES SECTION. Tube requires octal socket. This type
may be supplied with pin No.1 omitted. Heater
volts (acldc), 35; amperes, 0.15. For maximum
ratings and typical operation, refer to glass octal
type 35Z5-GT without panel lamp. Type 35Z4GT is used principally for renewal purposes.
HALF-WAVE VACUUM RECTIFIER
BS
p
~
NC 3
H 2
7 H
I
He
8
"
HL~'P
Glass octal type used in power
supply of ac/dc receivers. The heater
2
7
is provided with a tap for operation
H
H
of a panel lamp. Outline 14C, OUTI
8
LINES SECTION. Tube requires
HC
K
octal socket and may be mounted in any position. This type may be supplied with
pin No.1 omitted. For installation and application considerations, refer to miniature type 35W 4.
35Z5GT
HEATER VOLTAGE (Ae/DC):
ENTIRE HEATER (PINS 2 AND 7) . . • • . . . . . . . . . • . . . . . . . • . .
PANEL LAMP SECTION (PINS 2 AND 3) ....•.•....•.......
HEATER CURRENT:
BETWEEN PINS 2 AND 7 .•••.•••..•...•.•...•.....•..••
BETWEEN PINS 3 AND 7 . • • . . . . . . . • . . • . . • • . . • . " .••....
* Without panel lamp.
35
7.5
0.15
••
32
5.5
volts
volts
0.15
ampere
ampere
•• With No. 40 or No. 47 panel lamp.
HALF- WAVE RECTIFIER
Maximum Ratings. (Design-Center Values):
PEAK INVERSE PLATE VOLTAGE . • • • • . . . . . . • . . • . . . • . . . . • . . • • . . . . • . . • • . .
PEAK PLATE CURRENT . • • . . . . . . . . . . . • . . . . . • . . . • . . . . . . . . . . . . . . . • • . . . . .
DC OUTPUT CURRENT:
With Panel Lamp and
{NO Sh.unting ilesistor ..................... .
Shunting ResIstor ........................ .
Without Panel Lamp ............................................ .
454
700 max
600 max
volts
rna
60 max
90 max
100 max
rna
rna
rna
========= Technical Data
PANEL-LAMP-SECTION VOLTAGE (rms):
When Panel Lamp Fails .........................•.................
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect'to cathode . ..... " .................... .
Heater positive with respect to cathode ............................ .
15 max
volts
350 max
350 max
volts
volts
Typical Operation with Panellamp:t
AC Plate-Supply Voltage (rms) . . . . . . . . . . . . . . . . . . . . . . 117
117
117
117
235
volts
Filter-Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . • . .
40
40
40
40
40
/oI f
Minimum Total Effective Plate-Supply Impedance. . . ..
15
15
15
15
100
ohms
150
100
Panel-Lamp Shunting Resistor. . . . . . . . . . . . . . . . . . . . . . .
300
ohms
DC Output Current. .. ............................
60
70
80
90
60
rna
t No.40 or No.47 panel lamp used in circuit with capacitor-input filter given under type 35W4.
Typical Operation without Panel lamp:
AC Plate-Supply Voltage (rms) .. .........................
Filter-Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Total Effective Plate-Supply Impedance. . . . ......
DC Output Current. . . . . ............ ....................
DC Output Voltage at Input to Filter (Approx.):
At half-load current (50 rna.) . . . . . . . . . . . . . . . . . . . . . . . . . .
At full-load current (100 rna.) . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage Regulation (Approx.):
Half-load to full-load current. . . . . . . . . . . . . . . . . . . . . . . . . .
117
40
15
100
235
40
100
100
volts
/oI f
ohms
rna
140
120
280
235
volts
volts
20
45
volts
Maximum Circuit Values:,
Panel.Lamp Shunting Resistor·:
70 rna ................................... .
For de output current of 80 rna .................................•..
90 rna ................................... .
• Required when de output current is greater than 60 milliamperes.
~
G2
~
800 max
400 max
260 max
ohms
ohms
ohms
SHARP-CUTOFF TETRODE.
Glass type used as rf or if amplifier or as
biased or grid-resistor detector in radio receivers. Outline 24B, OUTLINES SECTION. Tube
P 2
:::
4 K
requires five-contact socket. Heater volts
(ac/dc), 6.3; amperes, 0.3. Characteristics as
class Al amplifier: plate volts, 250 max; grid,
5
No.2 volts, 90 max; grid-No.1 volts, -3; plate
H
H
rna., 3.2; grid-No.2 rna., 1.7 max; plate resistance, 0.55 megohm; transconductance, 1080 "mhos. This is a DISCONTINUED type listed for reference only.
G,
~
H4
H 3
5P
36
HALF-WAVE VACUUM RECTIFIER
b HM
36AM3
Miniature types used in power supply of ac/dcreceivers. These types have
NC 2
7 K
a tapped heater so that the heater sec,
tion between pins 4 and 6 can be used
NC
as a limiting. resistance in the rectifier
plate circuit. This heater section is not to, be used as a panel-lamp shunt. Outline
7C, OUTLINES SECTION. Tubes require miniature seven-contact socket and
may be operated in any position. Type 36AM3 is a DISCONTINUED type listed
for reference only.
36AM3A
36AM3B
HEATER VOLTAGE (AC/DC):
ENTIRE HEATER (PINS 3 AND 4) ......................... .
TAP SECTION (PINS 3 AND 6) ..................................... .
HEATER CURRENT (PINS 3 AND 6) .................................... .
HEATER WARM-UP TIME (Average), For 36AM3-B ..................... .
36
32.
0.1
20
volts
volt.
ampere
seconds
HAlF-WAVE RECTIFIER
Maximum :Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE ...................... .
PEAK PLATE CURRENT ............................... .
DC OUTPUT CURRENT ............................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater 'negative with respect to cathode ........... .
Heater positive with respect to cathode ............... .
36AM3-A
36AM3-B
365 max
580 max
82 max
96AM8
365 max
530 max
82 max
voltS
rna
rna
350·max
200·max
volts
volt•.
455
RCA Receiving Tube Manual
Typical.. Operation with Capacilor Input to Filter:
AC Plate-Supply Voltage (rms) . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filter-Input Capacitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Total Effective Plate Supply Resistance .............. .
DC Output Current. ......... .... .. . ..... ..
DCOutputVoltage.......................
Characteristics:
Tube Voltage Drop for plate current of 150 rna ............ .
• Tbe dc component must not exceed 350 volts.
• The dc component must not exceed 100 volts.
120
40
117
40
75
118
75
lOr.
rna
volts
16
20
volts
MEDIUM-MUTRIODE
37
Glass type used as voltage amplifier or detector in radio receivers. Tube requires five...,contact
socket. Heater volts (ac/dc), 6.3; amperes, 0.3.
Characteristics as class AI amplifier: plate volts,
250 max; grid volts, -18; plate rna., 7.5; plate
resistance,8400 ohms; amplification factor, 9.2;
transconductance, 1100 "mhos. This is a DIS·
CONTINUED type listed for reference only.
POWER PENTODE
38
Glass type used in output stage of radio
receivers. Outline 24B, OUTLINES SECTION.
Tube requires five-contact socket. Heater volts
(ac/dc), 6.3; amperes, 0.3. Characteristics as
'class AI amplifier: plate and grid-N 0.2 volts, 250
max; gridcNo.l volts, -25; plate rna., 22; gridNo.2 rna., 3.8; plate resistance, 0.1 megohm;
transconductance, 1200 ~mhos; load resistance.
10000 ohms; output watts, 2.5. This is a DISCONTINUED type listed for reference only.
REMOTE-CUTOFF PENTODE
volts
"r
Set text above
''''~7"
}j¥
H
H
~
~2
GI
p- 2
---
4
K
(;3
~
I
H
H
~,
~
Glass type used as rf or if amplifier in radio
receivers, particularly those employing ave.
P 2
__ _
Outline 24B, OUTLINES SECTION. Tube re(;3
quires fi ve-con tact socket. Heater vol ts (ac/ dc),
6.3; amperes, 0.3. Characteristics as class AI amplifier: plate volts, 250 max; grid-No.2 volts, 90
I
~
H
H
max; grid-No.1 volts, -3 min;- plate rna., 5.8;
grid-No.2 rna., 1.4; plate resistance, 1.0 megohm: transconductance, 1050 "mhos. This is a DISCONTINUED type listed for reference only.
""
39/44
MEDIUM-MU TRIODE
40
Glass type used as resistance-coupled or
impedance-coupled amplifier in battery-operated receivers. Outline 27, OUTLINES SECTION. Filament volts (dc), 5; amperes, 0.25.
Characteristics as class AI amplifier: plate-supply volts, 180; load resistance. 250000 ohms;
grid volts, -3; plate rna., 0.2; plate resistance,
150000 ohms; amplification factor, 30; transconductance, 200 "mhos. This is a DISCONTINUED type listed for reference only.
POWER PENTODE
41
456
Glass type.used in output stage of radio receivers. Tube-requires six-contact socket. Heater
volts (ae /de), 6.3; amperes, 0.4. This type is electrically identical with type 6K6-GT. Type 41
is used principally for renewal purposes.
~G
r
~
r
P~':
," ." . "
G3
.1
H
6
H
Technical Data
G~
~
==.
..GI
P 2
S
1
POWER PENTODE
K
Gl
6
H
H
G~
~
4GI
•••
P 2
.
•••
'1
Glass type used in audio output stage of
ae receivers. Outline 27, OUTLINES SECTION. Tube requires six-contact socket. Heater
volts (ac/dc), 6.3; amperes, 0.7. This type is
electrically identical with type 6F6. Type 42 is
used principally for renewal purposes.
42
POWER PENTODE
S K
G3
6
H
========--
H
Glass type used in audio output stage of
ac/dc'receivers. Outline 27, OUTLINES SECTION. Tube requires six-contact socket. Heater
volts (ac/dc), 25; amperes, 0.3. This type is.
electrically identical with type 25A6. Type 43
is used principally for renewal purposes.
43
POWER TRIODE
~G
Glass type used in output stage of radio receivers. Outline 27, OUTLINES SECTION.
Tube requires four-contact socket. Filament
volts (ac/dc), 2.5; amperes,l.5. Typical operation as class AI amplifier: plate supply volts,
275 max; grid volts, -56; cathode-bias resistor,
1550 ohms; amplification factor, 3.5; plate resistance, 1700 ohms; transconductance, 2050
"mhos; plate rna., 36; load resistance, 4600 ohms; undistorted power output, 2 watts. This is a DISCONTINUED type listed for reference only.
45
,~,
HALF-WAVE VACUUM RECTIFIER
~
..
5
Ne
Miniature type used in power supply of
small, portable, ac/dc/battery receivers where
small size and low heat dissipation are important. Outline 7B, OUTLINES SECTION. Tube
7 H
P 2
requires miniature Beven~ontact socket and
may be mounted in any.position. Heater volts
I
(ac/dc), 45; amperes, 0.075. Maximum ratings:
H
peak inverse plate volts, 350 max; peak plate
rna., 390 max; dc output ma., 65 max; peak heater-cathode volts, 175 max. Typical operation with
capacitor-input filter: ac plate volts (rms), 117; minimum total effective plate-supply impedance, 15
ohms; de output.ma., 65. This is a DISCONTINUED type listed for reference only.
Ie 3
6 P
45Z3
HALF-WAVE VACUUM RECTIFIER
HL:W5P
Glass octal type used in power supply of
ac/dc receivers. The heater is provided with a
tap for operation of a panel lamp. Outline 14C.
OUTLINES SECTION. Tube requires octal
socket. Without panel lamp, heater volts (ac/dc)
of entire heater (pins 2 and 7), 45; amperes,
0.15. With panel lamp, heater volts (ac/dc) of
1
8
panel-lamp section (pins 2 and 3 with 0.15
He
K
ampere between pins 2 and 7), 5.S. Except for
difference in heater voltage, this type has the
same ratings and typical operation values as glass octal type 35Z5-GT. Type 45Z5-GT is a DISCONTINUED type listed for reference only.
H
2
7
45Z5GT
H
p~:'-.
DUAL-GRID POWER AMPLIFIER
Glass type used as class AI or class B amplifier in radio equipment. Outline 28, OUTLINES SECTION. Tube requires five-con2
•••
tact socket. Filament volts (ac/dc), 2.5;
G2
amperes, 1. 75. Typical operation a. class AI
amplifier (grid No.2 connected to plate at
1
5
socket): plate volts, 250 max; grid volts, -33;
plate rna., 22; plate resistance, 2380 ohms; amplification factor, 5.6; transconductance, 2350 "mhos; load resistance for maximum undistorted power
output, 6400 ohms; output watts, 1.25. This is a DISCONTINUED type listed for reference only.
,
46
,
457
======. RCA Receiving Tube Manual
POWER PENTODE
I
~
Glass type. used in audio output stage of
radio receivers. Outline. 28, OUTLINES SECTION. Tube requires five-contact socket and
P 2
:::
4 02
should preferably be mounted in vertical position. Horizontal operation is permissible if pins
1 and 5 are in vertical plane. Filament volts
I
$
r
r
(ac/dc), 2.5; amperes, 1.75. Typical operation
as cia.. Al amplifier: plate and grid-No.2 volts,
250 max; cathode-bias resistor, 450 ohms; plate ma., 31; grid-No.2 rna., 6; plate resistance, 60000 ohms;
transconductance, 2500 "mhos; load resistance, 7000 ohms; power output, 2.7 watts. This type is used
principally for renewal purposes.
47
POWER TETRODE
48
Glas. type used in audio output stage of
radio receivers designed to operate from de
power lines. Outline28,OUTLINES SECTION.
Heater volts (de), 30; amperes, 0.4. Typical
operation as class AI amplifier: plate volts,
125 .max; grid-No.2 volts, 100 max; grid-No.1
volts, -20; plate rna., 56; grid-No.2 rna., 9.5;
transconductance, 3900 #'mhoB; load resistance,
1500 ohms; output watts, 2.5. This is a DISCONTINUED type listed for reference only.
DUAL-GRID POWER AMPLIFIER
o~
~
P 2
401
---
I
$ K
•
If
H
P~:::.
Gla.. type used in output stage of batteryoperated receivers. Outline 27, OUTLINES
SECTION. Tube requires five-contact socket.
Filament volts (de), 2.0; amperes, 0.12. Typical
02
operation as class Al amplifier (grid No.2 connected'to plate at socket): plate volts, 135 max;
I
$
grid volts, -20; plate rna., 6; plate resistance,
•
r
4175 ohms; amplification factor, 4.7; transconductance, 1125 "mhos; load resistance, 11000 ohms; output watts (approx.), 0.17. This is a DISCONTINUED type listed for reference only.
49
POWER TRIODE
Glass type used in output stage of af amplifiers employing transformer input coupling.
Maximum over-all length, 6-1/4 inches; maximum diameter, 2-7/16 inches. Tube requires
four-contact socket and should be mounted in
vertical position with base down. Filament volts
(ac/dc), 7.5; amperes, 1.25. Characteristics as
cia.. Al amplifier: plate volts, 450 max; grid
F
r
volts, -84; cathode resistor, 1530 ohms; plate
rna., 55; plate resistance, 1800 ohms; amplification factor, 3.8; transconductance, 2100 "mhos; load
resistance, 4350 ohms; output watts, 4.6. This is a DISCONTINUED type listed for reference only.
~o
50
~
BEAM POWER TUBE
SOAS·
Ne
Glass lock-in type used in output stage of
ac Idc receivers. Outline 13B; OUTLINES SECTION. Tube requires lock-in socket. Heater
volts (ac/dc), 50; amperes. 0.15. For ratings
and data, refer to gla..-octal type 50L6-GT.
Type 50A5 is used principally for renewal
purposes.
BEAM POWER TUBE
Miniature type used in output
stage of compact ac/dc receivers. Be.
cause of its high power sensitivity at
plate and screen-grid voltages available in ac/dc receivers, it is capable of
providing a relatively high power output; Outline 7C, OUTLINES SECTION.
SOBS
458
========= Technical Data =========Tube requires miniature seven-contact socket and may be mounted in any position.
Except for basing arrangement, type 50B5 is identical with miniature type 50C5.
BEAM POWER TUBE
Miniature type used in output
H
stage of compact, ac/dc radio receivers. Because of its high power sensitivity and high efficiency at plate and
screen-grid voltages available in ac/dc
Relaled Iype:
receivers, the 50C5 is capable of pro25C5
vi ding a relatively high power output.
Within its maximum ratings, type 50C5 is equivalent in performance to glass octal
type 50L6-GT. The basing arrangement of the 50C5 simplifies the problem of meeting Underwriters' Laboratories requirements in the design of ac/dc receivers.
50C5
HEATER VOLTAGE (AC/DC) ............................................ .
HEATER CURRENT ................................................... .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ................................................ .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 .............. .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................... .
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ..................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .................. .
PLATE DISSIPATION .................................................. .
GRID-No.2 INPUT ................................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......... .................... .
Heater positive with respect to cathode .............................. .
BULB TEMPERATURE (At. hottest point) ................................. .
• The de component must not exceed 100 volts.
50
0.15
ampere
volts
0.6
13
8.5
pI
pI
pI
150 max
130 max
o max
7 max
1.4 max
volts
volts
volts
watts
watts
200 max
200·max
220 max
volts
volts
°C
Typical Operation:
Plate Voltage ....................................................... .
120
110
Grid-No.2 Voltage .................................................. ..
Grid-No.1 (Control-Grid) Voltage ...................................... .
-8
Peak AF Grid-No.1 Voltage ........................................... .
8
49
Zero-Signal Plate Current ............................................. .
Maximum-Signal Plate Current ........................................ .
50
Zero-Signal Grid-No.2 Current ........................................ .
4
Maximum-Signal Grid-N 0.2 Current ............•.......................
8.5
Plate Resistance (Approx.) ............................................ . 10000
Transconductance ................................................... . 7600
volts
volts
volts
volts
rna
rna
rna
rna
ohms
I'mhos
AVERAGE PLATE CHARACTERISTICS
PENTODE CONNECTION
20 0
TVPE
socs
E.f'=!lDVOLTS
17 $~ GRIO-N22 VOLTS=IIO
~
~
~
j
i
3
10 0
Eel :0
12
•
10 0
,
0
•
I--
Ix
~ ""'"
----
2
~
Ib
2
I-
-
-4
I
~ r-~
GRID-Nil VOLTS ECI=-6
Ee, :::0
~b
-8
-- --
=;,0\-
.....
40
I
-10
-I.
0
80
120
PLATE
160
VOLTS
200
240
9ZC.M-6603T
459
RCA Receiving Tube Manual
Load Resistance. • • . • . . . . . . . • . . . . . . . . . . . • . . • . . . . . . . . . . . . . . . . . . . . • . . • ..
Total Harmonic Distortion ..•..•.....•.... " . . • . . • . . . . . . . . . . . . . . . . . . . . •
Maximum-Signal Power Output. • • • • .. • • • • • • • . . . . . • . . . . . . . . • . . . . . • . . . .
Maximum Circuit Values.
Grid-No.1-Circuit Resistance:
For fixed-bias operation. • . . . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . . . . . . . . . .
For cathode-bias operation. . . . . . •. . . . .. .. . . . . . . . . . . . . . . . . • . . . . . . . . . .
2600
10
2.3
O. 1 max
0.6 max
ohms
per cent
watts
megohm
megohm
INSTALLATION AND APPLICATION
Type 50C5 requires miniature seven-contact socket and may be mounted in
any position. Outline7C, OUTLINES SECTION. It is especially important that
this tube, like other power-handling tubes, be adequately ventilated.
The 50-volt heater is designed to operate under the normal conditions of linevoltage variation without materially affecting the performance or serviceability
of the 50C5. For operation of the 50C5 in series with other types having 0.15ampere rating, the current in the heater circuit should be adjusted to 0.15 ampere
for the normal supply voltage.
In a series-heater circuit of the "dc power line" type employing several 0.15ampere types and one or two 50C5s, the heater(s) of the 50C5(s) should be placed
on the positive side of the line. Under these conditions, heater-cathode voltage of
the 50C5 must not exceed the value given under maximum ratings. In a seriesheater circuit of the "universal" type employing rectifier tube 35W4, one or two
50C5s, and several 0.15-ampere types, it is recommended that the heater(s) of the
50C5(s) be placed in the circuit so that the higher values of heater-cathode bias will
be impressed on the 50C5(s) rather than on the other 0.15-ampere types. This is
accomplished by arranging the 50C5(s) on the side of the supply line which is
connected to the cathode of the rectifier, i.e., the positive terminal of the rectified
voltage supply. Between this side of the line and the 50C5(s), any necessary
auxiliary resistance and the heater of the 35W4 are connected in series.
As a power amplifier (class AI), the 50C5 is recommended for use either singly
or in push-pull combination in the power-output stage of Hac/dc" receivers. The
operating values shown under typical operation have been determined on the basis
that grid-No.1 current does not flow during any part of the input cycle.
SOC6G
~
24
BEAM POWER TUBE
Glass octal type used in output stage of
ac/dc receivers. Outline 26, OUTLINES SECTION. Heater volts (ac/dc), 50; amperes, 0.15.
Except for heater rating, this type i. identical
with glass octal type 6Y6-G. Type 50C6-G is
a DISCONTINUED type listed for reference
only.
HALF-WAVE VACUUM RECTIFIER
SGI
P3
H
2
7
H
18K
NC
G3
*
H4
H 3
sP
b HL
Miniature type used in power supply of ac/dc radio receivers. The heater
NC 2
7 K
is provided with a tap for operation of
a panel lamp. For typical circuit, refer
I
to type 35W4. Outline 7C, OUTLINES
NC
SECTION. Tube requires seven-contact socket and may be mounted in any position.
500C4
HEATER VOLTAGE (AC/nc):
ENTIRE HEATER (PINS 3 AND 4) . . . . . . . . • . . . . . . . • . . . . . .
PANEL-LAMP SECTION (PINS 4 AND 6) • . • . . . . . • . . . . . . . . .
HEATER CURRENT:
BETWEEN PINS 3 AND 4 . . • . . . . . . . . . . . • . . . . . . . . . . . . . . .
BETWEEN PINS 3 AND 6 • . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
* Without panel lamp.
460
*50
**
45
7.5
5.5
volt.
volt.
volt.
0.15
ampere
ampere
0.15
** With No.40 or No.47 panel lamp.
========= Technical Data =========
HALF-WAVE RECTIFIER
Maximim Ratings, (Design-Maximum Values):
PEAK INVERSE PLATE VOLTAGE ...................................... .
PEAK PLATE CURRENT .............................................. .
DC OUTPUT CURRENT:
With Panel Lamp and J No Sh.unting !l-esi~tor ..................... .
I Shuntmg ResIstor ....................... .
Without Panel Lamp ........................................... .
PANEL-LAMP-SECTION VOLTAGE (rms):
When Panel Lamp Fails ........................................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
330 max
720 max
volt.
rna
70 mao;..
110 max
120 max
rna
16.5max
volts
330 max
330 max
volts
volts
rna
rna
Typical Operation with Panel Lamp:t
117
AC Plate-Supply Voltage (rms) ....................... . 117 117
117
volts
40
40
40
Filter-Input Capacitor .............................. .
40
p.f
15
15
15
Minimum Total Effective Plate-Supply Impedance ...... .
15
ohms
100
75
ohms
Panel-Lamp Shunting Resistor ....................... . 450 200
90
DC Output Current ................................. .
70
80
100
rna
t No.40 or No.47 panel lamp used in circuit with capacitor-input filter given under type 35W4.
Typical Operation without Panel Lamp:
AC Plate-Supply Voltage (rms) ...................................... .
Filter-Input Capacitor .............................................. .
Minimum Total Effective Plate-Supply Impedance ..................... .
DC Output Current ................................................ .
DC Output Voltage at Input to Filter (Approx.):
At half-load current (55 rna.) .................................... .
At full-load current (110 rna.) .................................... .
Voltage Regulation (Approx.):
Half-load to full-load current .................................. ~ ..
• Required when dc output current is greater than 70 milliamperes.
117
40
15
110
volts
p.f
ohms
130
110
volts
volt.
20
volts
rna
POWER PENTODE
Miniature type used in the audio
output stage of radio and television
receivers and in phonographs. Outline
7C, OUTLINES SECTION. Heater
volts (acjdc), 50; amperes, 0.15. Except for heater rating, this type is
identical with miniature type 6EH5.
G2
~
G,
50EH5
Related types:
6EH5, 12EH5, 25EH5
BEAM POWER TUBE
Glass octal type used in audio3
:::
output stages of compact stereophonic
--and monophonic phonographs and raH 2
7 H
dio and television receivers. Outline
Relaled type:
8
14F,OUTLINESSECTION. Tubere6FE5
K.G3
quires octal socket and may be mounted
in any position. Heater volts (ac/dc), 50; amperes, 0.15. Peak heater-cathode volts,
heater negative with respect to cathode, 200 max. Except for heater ratings and
heater-cathode voltage, this type is identical with glass octal type 6FE5.
p
4
5
50FES
POWER PENTODE
Miniature type used as audio output amplifier in ac/ dc radio receivers.
Outline 7C, OUTLINES SECTION.
Tube requires seven-contact socket
and may be operated in any position.
50FK5
461
RCA Receiving Tube Manual
HEATER VOLTAGE (AC/DC) ................... .
HEATER CURRENT ..................... .
DIRECT INTERELECTRODE CAPACITANCES:
Grid No.1 to Plate ..................................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 .. .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ....
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Vallles):
PLATE VOLTAGE. .
...
.
.,,;RID-No.2 (SCREEN-GRID) VOLTAGE .................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value.
PLATE DISSIPATION...
. ......... .
GRID-No.2 INPUT ............... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode.
Heater positive with respect to cathode.
BULB TEMPERATURE (At hottest point) ....
Typical Operation and Characteristics:
Plate Supply Voltage .....
Grid-No.2 Supply Voltage.
Cathode-Bias Resistor ...
Peak AF Grid-No.1 Voltage .. .
Zero-Signal Plate Current ...... ' .
Maximum-Signal Plate Current ..
Zero-Signal Grid-N 0.2 Current ...... .
Maximum-Signal Grid-No.2 Current ..
Plate Resistance (Approx.) ....
Transconductance .... .
Load Resistance ... .
Total Harmonic Distortion ....... .
Maximum-Signal Power Output. .. .
50
0.1
volts
ampere
0 65
17
9
pi
pI
pI
150 max
130 max
o max
5 max
1.75 max
volts
volts
volts
watts
watts
200 max
200-max
225 max
volts
volts
°C
110
115
62
3
32
32
8.5
12
14000
12800
3000
8
1.2
volts
volts
ohms
volts
rna
rna
rna
rna
ohms
.umhos
ohms
per cent
watts
0.1
0.5
megohm
megohm
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias operation ............. .
For cathode-bias operation ............. .
• The dc component must not exceed 100 volts.
AVERAGE PLATE CHARACTERISTICS
TYPE 50FK5
Ef
~
:!j
~50
VOLTS
GRID -No.2 VOLTS
tl5
t
.. 80
'"
GRID-No.1 VOLTS
~
:;;
~60
':!
~
.;
z
1
co
0:
o
40
I--I
i/ j..--
\
N
~
ECI"'O
:tb
' j 1/
~~
~
-3
...
IV
//
1/('.
-2
~
-~
20
-
~
-40
__ IC2_-
- -
&0
-=-=- I-:. E~I':O_
-- -
80
tOO
PLATE VOLTS
POWER PENTODE
-4
-
-2
-6
120
140
160
',CM-IOlI6T
H~H4
_:_:_::2
b HL
Miniature type used in audio-frequency power-output stage of radio receivers. Outline 7C, OUTLINES SEC- GI 2
7 p
TION. Tube requires miniature seven1
contact socket and may be mounted
K,G3
in any position. The heater is provided with a tap for operation of a panel lamp.
Heater volts Cac/dc), 50; amperes, 0.15; tap volts (without panel lamp), 7.
50HK6
462
========= Technical Data =========
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE.. . .
. ..................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ...... .
PLATE DISSIPATION ................ .
GRID-No.2 INPUT ..... .
RMS HEATER-TAP VOLTAGE WHEN PANEL LAMP FAILS ..
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ..... .
Heater positive with respect to cathode .... .
...........
..........
......... ".
.............
max
max
max
max
max
volts
volts
watts
watts
volts
200 max
200-max
volts
volts
150
130
5.5
1.1
14
Typical Operation and Characteristics:
Plate Voltage. " ....................... .
Grid-No.2 Voltage ............... .
Grid-No.1 (Control-Grid) Voltage. . .. .... .. ..
. ........ .
Peak AF Grid-No.1 Voltage.. ........... ....
. ........... .
Zero-Signal Plate Current. . . . . . . . . . . . . . . . . . .
. ......... .
Maximum-Signal Plate Current. . . . . . . . . .
. . , ................. .
Zero-Signal Grid-No.2 Current .. , ..........
. .......... .
Maximum-Signal Grid-No.2 Current .............................. .
Plate Resistance (Approx.) ............................. .
Transconductance. . . . . .
. .................................. .
Load Resistance ............................................. .
Total Harmonic Distortion (Approx.) ................................. .
Maximum-Signal Power Output ...................................... .
110
110
-7.5
7.5
49
50
4
8.5
10000
7500
2500
9
1.9
volts
volts
volts
volts
ma
ma
ma
rna
ohms
.umhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed-bias operation ..................................... .
For cathode-bias operation ............................ .
• The dc component must not exceed 100 volts.
24
~
0.1 max megohm
0.5 max megohm
BEAM POWER TUBE
Glass octal type used in output
stage ofac/dc radio receivers. Outline14C,OUTLINESSECTION.Tube
2
7
Related types:
H
H
requires octal socket and may be
12L6GT, 25L6, 25L6GT
18K
any
position.
This
type
mounted
in
NC
Gl
may be supplied with pin No.1 omitted. Refer to miniature type 50C5 for installation and application information.
5GI
P3
50L6GT
HEATER VOLTAGE CAC/DC) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate .............................................. .
Grid No.1 to Cathode, Heater, Grid No.2. and Grid No.3 ............ .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................. .
50
0.15
volts
ampere
0.6
15
9.5
pI
pf
pI
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ................................... .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ............................ .
Heater positive with respect to cathode ..•..........................
Typical Operation:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage .............................. ..
Grid-No.1 (Control-Grid) Voltage ........................ .
Peak AF Grid-No.1 Voltage ............................. .
Cathode-Bias Resistor .................................. .
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current. . ........................ .
Maximum-Signal Grid-N 0.2 Current ...........•...........
200 max
125 max
10 max
1.25 max
volts
volts
watts
watts
90 max
90 max
volts
volts
Fixed Bias Cathode Bias
110
200
110
125
-7.5
7.0
8.0
180
49
46
50
47
4
2.2
10
8.5
volts
volts
volts
volts
ohms
rna
ma
rna
rna
463
RCA Receiving Tube Manual
Plate Resistance (Approx.) ••...................•..........
Transconductance . ..................................... .
Load Resistance ................•........................
Total Harmonic Distortion . ........ _..................... .
Maximum-Signal Power Output .......................... .
13000
8000
2000
10
2.1
28000
8000
4000
10
3.8
ohm.
I'mho.
ohms
per cent
watt.
VACUUM RECTIFIER-DOUBLER
SOX6
Lock-in type used as half-wave rectifier or
voltage doubler in ae Idc receivers. Outline 13B,
OUTLINES SECTION. Tube requires lock-in
socket. Heater volts (ac/dc), 50; amperes, 0.15.
This type is electrically identical with glass
octal type 50Y6-GT and, except for heater
rating, with glass octal type 25Z6-GT. Refer to
type 25Z6-GT for maximum ratings, typical
operation, and curves. Type 50X6. is used
principally for renewal purposes.
VACUUM RECTIFIER-DOUBLER
NC4
~
SNC
P02
POI
3
6
K02 2
7 KOI
I
H
8
as
H
~
KD2 4
.
SPOI.
Glass octal type used as half-wave P02 3
rectifier or voltage doubler in ac/dc
receivers. This type is used particuH 2
.
7 H
larly in "transformerless" receivers of
I
8
either the ac/dc type or the voltage.
NC
KOI
doubler type. Outline 14C, OUTLINES
SECTION. This type may be supplied with pin No.1 omitted. Tube requires octal
socket, Heater volts (ac/dc), 50; amperes, 0.15. Except for heater rating, this type
is electrically identical with type 25Z6-GT.
SOY6GT
V ACUUM RECTIFIER-DOUBLER
K02
POI
~S
Glass octal type used as half-wave rectifier
or voltage doubler in ae/dc receivers. This type
P02 3
6 HL
is used particularly in "transformerless" receivers of either the ac/dc type or the voltagedoubler type. The heater is provided with a tap
H 2
7H
for operation of a panel lamp. Outline 14 C, OUTLINES SECTION. Tube requires octal socket.
I
8
Without panel lamp, heater volts (ac/dc) of
NC
KOI
entire heater (pins 2 and 7), 50; amperes, 0.15. With panel lamp, heater volts (ac/dc) of panel-lamp
section (pins 6 and 7 with 0.15 ampere between pins 2 and 7), 5.5. For maximum ratings and typical
operation as half-wave rectifier or voltage doubler without panel lamp, refer to glass octal type 25Z6-GT.
When operated with a panel lamp and 250-ohm panel-lamp shunting resistor, ratings and typical
operation are the same as for type 25Z6-GT, except that de output current per plate is 65 mao Type
50Y7-GT is used principally for renewal purposes.
SOY7GT
VACUUM RECTIFIER-DOUBLER
K024
~
SPOI
Glass octal type used as half-wave rectifier
P023
. b HL
or voltage doubler in ac/dc receivers. Outline
22, OUTLINES SECTION. The heater is provided with a tap for operation of a panel lamp.
2
7
Without panel lamp, heater volts (ac/dc) of
H
H
entire heater (pins 2 and 7), 50; amperes, 0.15.
I
8
With panel lamp, heater volts (ac/dc) of panelNC
KOI
lamp section (pins 6 and 7 with 0.15 ampere
between pins 2 and 7), 2. Maximum ratings as rectifier or doubler: peak inverse plate volts, 700 max;
peak plate mao per plate, 400 max; de output rna. per plate with panel lamp, 65 max; peak heatercathode volts, 350 max; panel lamp section volts (pins 6 and 7); 2.5 max. This is a DISCONTINUED
type listed for reference only.
50Z7G
HIGH-MU TWIN POWER TRIODE
53
464
Glass type used in output stage of acoperated receivers as a· class B power amplifier.
Outline 27, OUTLINES SECTION. Tube requires medium seven-contact (0.855-inch pincircle diameter) socket. Heater volts (ac/dc),
2.5; amperes, 2.0. Except for heater rating, this
type is electrically identical with metal type
6N7. Type 53 is a DISCONTINUED type
listed for reference only.
K
========= Technical Data =========
~
H4
sGI
H 3
POWER PENTODE
b G2
Miniature type used in output
2
7
stages of audio amplifiers, especially
GI
P
in two-tube series-string stereo sysRelated type:
KI
terns. This type has extremely high
12FX5
G3
power-sensitivity and can be driven to
full output by a ceramic or crystal phonograph pickup. Outline 7C, OUTLINES
SECTION. Tube requires seven-contact socket and may be mounted in any position.
60FX5
HEATER VOLTAGE (AC/DC) .............•..............................
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.8 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.8 ............... .
volts
ampere
0.65
17
pf
pf
pf
9
CLASS A, AMPLIFIER
Maximum Ratings, (Desig ....M""'imum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT ................................................... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
BULB TEMPERATURE (At hottest point) ............................... .
Typical Operation:
Plate Supply Voltage ............................................... .
Grid-No.2 Supply Voltage .......................................... ..
Cathode-Bias Resistor .............................................. .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ................................•......
Zero-Signal Grid No.2 Current ....................................... .
Maximum-8ignal Grid No.2 Current .................................. .
Plate Resistance ................................................... .
Transconductance ............ ; ..................................... .
Load Resistance ................................................... .
Total Harmonie Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
60
0.1
150 m"",
130 m"'"
5.5m"'"
2m"",
volts
volts
watts
watts
200m"",
200*m"",
225 ma",
volts
volts
·C
110
115
62
3
36
35
10
12
17500
13500
3000
8
1.3
Maximum Circuit Values:
Grid-No.1-Circuit Resistance:
For fixed"bias operation ......................................... .
For cathode-bias operation ...................................... .
volts
volts
ohms
volts
rna
rna
ma
ma
ohms
I'mhos
ohms
per cent
watts
0.1 ma",
0.5m"'"
megohm
megohm
AVERAGE CHARACTERISTICS
100
LD-J., ~oL ~1~ f -
TYPE 6OfX5
E.,=60 VOL.TS
GRID-N.l.2 VOLT5=1I5
0
'.
I
~~
/'
/
0
\ 1/ f..--
'/; V
-
f-;~
V
b
i:;>oC
-4
20
-2
-3
I
-- - - -- -- r---
40
60
80
PLATt: \/OL'I'S
100
-.-4
'-
1b
£.
o
-.I. f -
-
1//~i~
0
1b
-5
120
140
160
UCU-I0546T
465
RCA Receiving Tube Manual
RECTIFIER-BEAM POWER TUBE
Glass octal type used as combined halfwave rectifier and output amplifier in ac/dc
receivers. Outline 14E, OUTLINES SECTION.
Tube requires octal socket. Heater volts (ac/dc),
70; amperes, 0.15. Maximum ratings of rectifier
unit: peak inverse plate volts, 350; peak plate
rna., 420; dc output rna., 70; peak heatercathode volts,175; minimum total effective
plate-supply impedance, 15 ohms. Typical operation and maximum ratings of beam power unit as class
A, amplifier: plate and grid-No.2 volts, 110 (117 max); grid-No.1 volts, -7.5; plate rna., 40; grid-No.2
rna., 3; plate resistance, 15000 ohms; transconductance, 7500 j.lmhos; load. resistance, 2000 ohms;
output watts, 1.8; .plate dissipation, Ii max watts; grid-No.2 input, 1 max watt. This type is used
principally for renewal purposes.
70L7GT
TWIN DIODE-HIGH-MU TRIODE
75
Glass type used as combined detector, amplifier, and ave tube in radio receivers. Outline
24B, OUTLINES SECTION. Tube requires sixcontact socket.·Heater volts (ac/dc), 6.3; amperes, 0.3. Except for interelectrode capacitances and plate volts of 250 max, this type is
identical electrically with metal type 6SQ7.
Type 75 is used principally for renewal purposes.
REMOTE-CUTOFF PENTODE
78
Glass type used in rf and if stages of radio
receivers, particularly those employing ave.
Outline 24B, OUTLINES SECTION. Tube requires six-contact socket. Heater volts (ac/dc),
6.3; amperes, 0.3. Except for capacitances, this
type is. identical electrically with metal type
6K7.Type 78 is used principally for renewal
purposes.
FULL-WAVE VACUUM RECTIFIER
Glass type used in power supply of radio
equipment having moderate direct-current requirements. Outline 27, OUTLINES SECTION, except maximumover-alilength4 inches;
maximum seated length, 3-3/8 inches. Tube requires four-con tact socket and should be moun ted
preferably in a vertical position. Horizontal
mounting is- permissible if pins 1 and 4 are in a
horizontal plane. Filament volts (ac), 5.0; amperes, 2.0. For ·filament operation, refer to type5U4-G. Type 80 is electrically identical with glass octal
type 5Y3-GT. Type 80 is used principally for renewal purposes.
80
FULL-WAVE VACUUM RECTIFIER
'0; .
Glass type used in power supply of automobile and ac-operated -radio receivers. Maximum dimensions: over-all length, 4-3/16 inches;
seated height, 3-9/16 inches; diameter, 1-9/16
PO z
inches. Tube, requires five-contact socket.
Heater volts (ac/dc), 6.3; amperes, 0.5. MaxiI
~
mum ratings: peak inverse plate volts, 1250
H
H
max; peak plate rna., 180 max; dc output rna.,
60 max; peak heater-cathode volts, 450 max.
Typical operation with capacitor-input filter: ac plate-to-plate supply volts (rms), 650; minimum total
effective.plate-supply impedance per plate,. 150 ohms; de output rna., 60. Typical operation with chokeinput filter: ac plate-to-plate supply volts (rms), 900; minimum filter-input choke, 10 henries; de output rna:, 60. This type is used principally for renewal purposes.
84/6Z4
466
=========;;,; Technical Data
RECTIFIER-BEAM POWER TUBE
~
GIB4
~2B
Glass octal type used as combined halfwave rectifier and output amplifier in ae/de
receivers. Outline 14E, OUTLINES SECTION.
Tube requires octal socket. Heater volts (ac/dc),
117: amperes, 0.09. For ratings and operation
2
7
H
H
of rectifier unit, refer to type 117N7-GT. TypiI
8
cal operation of beam power unit as class At
KO
G3B
amplifier: plate and grid-No.2 volts, 105 (117
KB
max); grid-No.1 volts, -5.2; peak af grid-No.1
volts, 5.2; plate rna., 43 j grid-No.2 rna., 4 (zero-signal); 5.5 (maximum-signal); plate input, 6 max watts;
grid-No.2 dissipation, 1 max watt; plate resistance (approx.), 17000 ohms; transconductance, 5300
",mhos; load resistance, 4000 ohms; total harmonic distortion, 5 per cent: maximum-signal power
output, 0.85 watt. Type 117L7/M7-GT is used principally for renewal purposes.
PB 3
:::
117L7/
M7GT
6 Po
RECTIFIER-BEAM POWER TUBE
Glass octal type used as combined halfwave rectifier and output amplifier in ae/de receivers. Outline 14E, OUTLINES SECTION.
117N 7GT
Tube requires octal socket and may be mounted
in any position. Heater volts (ac/dc), 117; amperes, 0.09. Maximum ratings of rectifier unit
as half-wave rectifier: peak inverse plate volts,
350 max; peak plate rna., 450 max; dc output
rna., 75 max; peak heater-cathode volts (heater
negative with respect to cathode), 175 max. Typical operation with capacitor-input filter: ac plate
supply volts (rms), 177; minimum total effective plate-supply impedance, 15 ohms; dc output rna., 75;
dc output volts at input to filter, 122. Typical operation of beam power unit as class Al amplifier:
plate and grid-No.2 volts, 100 (117 max); grid-No.1 volts, -6; peak af grid-No.1 volts, 6; plate rna., 51;
grid-No.2 rna., 5; plate dissipation, 5.5 max watts; grid-No.2 input, 1 max watt; plate resistance (approx.)
16000 ohms; transconductance, 7000 JLmhos; load resistance, 3000 ohms; total harmonic distortion,
6 per cent; maximum-signal power output, 1.2 watts. This type is used principally for renewal purposes.
I
RECTIFIER-BEAM POWER TUBE
Glass octal type used as combined halfwave rectifier and output tube. Outline 14E,
OUTLINES SECTION. Tube requires octal
socket. Heater volts (acldc), 117; amperes, 0.09.
This type is electrically identical with glassoctal type 117L7/M7-GT. Type 117P7-GT is
used principally for renewal purposes.
~
H4
117P7GT
HALF-WAVE VACUUM RECTIFIER
sP
Miniature type used in power supply of
ac Ide battery radio receivers. The heater is designed for operation directly across a 117-volt
ac or nc supply line. Outline 7C, OUTLINES
SECTION. Tube requires miniature seven-con2
7
tact socket. This tube, like other power-hanNC
I
NC
dling tubes, must be adequately ventilated.
IC
Heater volts (ac/dc), 117; amperes, 0.04. Maximum ratings for half-wave rectifier service:
peak inverse plate volts, 330 max; peak plate rna., 540 max; dc output rna., 90 max; peak heater-cathode
volts: heater negative with respect to cathode, 175 max; heater positive with respect to cathode, 100
max. This type is used principally for ren€wal pUrpOE€S.
H
3
6
p
K
~
117Z3
HALF-WAVE VACUUM RECTIFIER
Glass octal type used in power supply of
ac/dc/battery radio receivers. Maximum overall length, 3 inches; maximum diameter, 1-5/16
inches. Tube requires octal socket. Heater volts
(ac/dc), 117; amperes, 0.04. Maximum ratings
H 2
7 H
as half-wave rectifier: peak inverse plate volts,
350
max; peak plate rna., 540 max; peak heaterI
8
NC
K
cathode volts, 175 max. Typical operation with
capacitor-input filter: ac plate supply volts
(rms), 117; minimum total effective plate-supply impedance, 30 ohms; dc output rna., 90. This is a
DISCONTINUED type listed for reference only.
NC 3
117Z4GT
467
RCA Receiving Tube Manual
VACUUM RECTIFIER-DOUBLER
~
K02 4
Glass octal type used as half-wave rectifier or
117Z6GT
~P.OI
.
P02
voltage doubler in ac Ide receivers. Outline 14C,
3
OUTLINES SECTION. Tube requires octal
socket and may be mounted in any position.
This type may be supplied with pin No.1 omitted. Heater volts (ac/dc), 117; amperes, 0.075.
Maximum ratings: peak inverse plate volts,
700 max; peak plate rna. per plate, 360 max;
de output rna. per plate, 60 max; peak heater-
H2
7H
I
8
He
KOI
cathode volts, 350 max. Typical operation as half-wave rectifier with capacitor-input filter or as halfwave or full-wave voltage doubler: ac plate supply volts per plate (rms), 117; filter-input capacitor,
50 I'f; minimum total effective plate-supply impedance per plate, 15 (30 for half-wave doubler service);
de output rna. per plate, 60. This type is used principally for renewal purposes.
H
SHARP-CUTOFF PENTODE
Miniature type used as audio
amplifier in applications requiring reduced micro phonics, leakage noise, and
hum. Especially useful in the input
stages of medium-gain public-address
GI
systems, home sound recorders, and general-purpose audio systems. Outline 8B,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position. For operation as resistance-coupled amplifier, refer to
RESISTANCE-COUPLED AMPLIFIER SECTION.
5879
HEATER VOLTAGE (AC/DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
HEATER CURRENT •••••••••••••.••••••••....•••••.••.•...••••.••••••.
DIRECT INTERELECTRODE CAPACITANCES:
Pentode Connection:
Grid No.1 to Plate ............................................... .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ............ .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ................. .
Triode Connection*:
Grid No.1 to Plate ............................................... .
Grid No.1 to Cathode and Heater ................................. .
Plate to Cathode and Heater ..................................... .
Grid No.2 and grid No.3 connected to plate.
*
CLASS Al AMPLIFIER
Triode
Connection*
275 max
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE •••••••••••..••..••••••...•.•••••••.•••
AVERAGE
6.3
0.15
volt.
ampere
pf
pf
pf
0.11 max
2.7
2.4
pf
pf
pf
1.4
1.4
0.85
Pentode
Connection
330 max
CHARACTERISTICS
PENTOOE CONNECTION
TYPE 5879
I
E.; '"6.3 VOL. TS
GRID-N!2 YOL.TS::IOO
GRID-N'3 VOL.TS: 0
EC:l=O
Ib
/r
-0.5
[
-1.0
-1.5
t--
K
~
V
-2.0
Ib
-~2.S
--
.!...Ci
GRID-Nil VOLTS Eel =-3.0
f-ECj:
1;- -- -t-='-
0
I
TYPE 6973
Ef! = 6.3 VOLTS
GRID-NS!2 VOLTS .. ZSO _
[C,=o
100
-- --1=
Ee,
200
0
300
400
PLA.TE VOLTS
.00
600
100
'ZeN-tl"T
471
RCA Receiving Tube Manual
PUSH-PULL CLASS ABI AMPLIFIER
Grid No.2 of Each Tube Connected to Tap on Plate Winding of Output Transformer
Maximum Ratings, (Design-Maximum Values):
410 max
. PLATE AND GRID-No.2. SUPPLY VOLTAGE ..................... " ........ .
PLATE DISSIPATION .. '............................................... .
12 max
GRID-No.2 INPUT .... '............................................... .
1.75max
PEAK HEATER-CATHODE VOLTAGE:
200 max
Heater negative with 'respect to cathode ............................ .
Heater positive with respect to cathode ............................ .
200"max
250 max
BULB TEMPERATURE (At hottest point) . . . . . . . . . . . . . . . . . . . .. . ......... .
Typical Operation, (Values are for two tubes):
Fixed Bias
Plate Supply Voltage ................................. .
375
Grid-No.2 Supply Voltage ............. , ............... .
*
-33.5
Grid-No.1 Voltage. . ................................ .
Cathode-Bias Resistor ................................. .
Peak AF Grid-No.1-to-Grid-No.1 Voltage ............... .
67
62
Zero-Signal Cathode Current ........................... .
95
Maximum-Signal Cathode Current ...................... .
12500
Effective Load Resistance (Plate-to-plate) ............... .
1.5
Total Harmonic Distortion ............................ .
18.5
Maximum-Signal Power Output ........ '" ............. .
Cathode Bias
370
#
355
62
74
84
13000
1.2
15
volt.
watt.
watt.
volts
volt.
°c
volts
volts
volts
ohms
volt.
rna
rna
ohm.
per cent
watts
Maximum Circuit Values:·
Grid-No.1-Circuit Resistance:
For fixed-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0; 5 max megohm
For cathode-bias operation. . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . .
1 max megohm
" The dc component must not exceed 100 volts.
* Obtained from taps on the primary winding· of the output transformer. The taps are located on each
side of the center tap (B+) so as to apply 50 per cent of the plate signal voltage to grid No.2 of each
output tube.
# Obtained from taps on the primary winding of the putput transformer. The taps are located on each
side of the center tap (B+) so as to supply 43 per cent of the plate signal voltage to grid No.2 of each
output tube .
• The type of input-coupling network used should not introduce too much resistance.!n the grid-No.1
circuit. ·Transformer- or impedance-coupling devices are recommended.
HIGH-MU TWIN TRIODE
Miniaturetype used as phase inverter or resistance-coupled amplifier
in high-quality, high-fidelity audio
I
amplifiers where low noise and hum
are primary considerations. Outline
PT2
8B, OUTLINES SECTION. This type is identical with miniature type 12AX7
except that it has a controlled equivalent noise and hum characteristic. For operation as resistance-coupled amplifier, RESISTANCE-COUPLED AMPLIFIER
SECTION.
7025
Equivalent-Noise and Hum Voltage Referenced to Grid, (Each Unit):
Average Value (rmslt ...............................................
1. 8
I'volts
Maximum Value (rms). ......................... ....................
7
I'volt.
t Measured in "true rms" units under following conditions: heater volts (ac), 6.3 (parallel connection);
center tap of heater transformer connected to ground; plate supply volts, 250; plate load resistor, 2700
'Ohms; cathode..bypass capacitor, 100 J.'f; grid resistor, 0 'Ohms; and amplifier covering frequency range
between 25 to 10000 cycles per second.
-Same conditions'ss for ','Average Value" except: cathode resistor is unbypassed and grid resistor,
0.05 megohm.
BEAM POWER TUBE
Glass octal types usedinpush~pull
7027
power amplifier circuits of high-fidelity
audio equipment. Tubes provide high
power sensitivity and high stability and
G2
K,G3
are capable of delivering high power
output.at low distortion. Double base-pin connections for both grid No.1 and grid
No.2 provide for flexibility of circuit arrangement and also cool operation of the
grids with the result that reverse grid current is minimized. Outline 19D, OUT-
7027A
472
========--
========---Technical Data
LINES SECTION, except diameter is 1-5/8 inches max. Tubes require octal
socket and may be mounted in any position. It is especially important that these
tubes, like other power-handling tubes, be adequately ventilated. Type 7027 is
a DISCONTINUED type listed for reference only.
HEATER VOLTAGE (AC/nc) ........................................... .
HEATER CURRENT .................................................. .
DIRECT INTERELECTRODE CAPACITANCES (Approx.):
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, Heater, Grid No.2, and Grid No.3 ............... .
6.3
0.9
volts
ampere
1.5
10
7.5
pf
pf
pf
250
250
volts
volts
volts
ohms
I'mhos
ma
ma
CLASS AI AMPLIFIER
Cha ra cte ristics:
Plate Voltage ...................................................... .
Grid-N 0.2 (Screen-Grid) Voltage ..................................... .
Grid-No.1 (Control-Grid) Voltage .................................... .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Plate Current ...................................................... .
Grid-No.2 Current ................................................ ..
-14
22500
6000
72
5
PUSH-PULL CLASS ABl AMPLIFIER
Maximum Ratings for 7027-A, (Design-Maximum Values):
PLATE VOLTAGE ................................................ ' . .
GRIn-NO.2 VOLTAGE ................................................ .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRIn-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
Typical Operation for 7027-A, (Values are for two tubes):
Fixed Bias
400
Plate Supply Voltage ...............
450
540
300
350
400
Grid-No.2 Supply Voltage ...........
-25" -30" -38·
Grid-N 0.1 Voltage ..................
Cathode-Bias Resistor ..............
Peak AF Grid-No.1-to-Grid-No.1
Voltage .........................
50
60
76
102
95
100
Zero-Signal Plate Current ...........
194
Maximum-Signal Plate Current. .....
152
220
Zero-Signal Grid-No.2 Current .......
6
3.4
5
Maximum-Signal Grid-No.2 Current ..
19.2 21.4
17
Effective Load Resistance (Plate-toPlate) ...........................
6600
6000
6500
600 max
500 max
35 max
5 max
volts
volts
watts
watts
200 max
200 "max
volts
volts
Cathode Bias
400
380
425
300
380
425
200
180
200
volts
volts
olts
ohms
57
112
128
7
16
68.5
138
170
5.6
20
86
150
196
8
20
volts
ma
ma
rna
ma
6600
4500
3800
ohms
AVERAGE PLATE CHARACTERISTICS
TYP( 7027-A
6.3 VOLTS
E.,=
GRID-N:!I VOI.TS=O
.. 0 0
"00
V30 0
~oo
V +-l-
300
~
20 0
f-10
l =250
GRID - NI 2 VOLTS EC 2
-
100
Or
100
100
Ir
[0.=00
100
200
300
400
PLATE
SOD
I
.00
VOLTS
473
RCA Receiving Tube Manual
Total Harmonic Distortion ......... .
Maximum-Signal Power Output.
2
34
1.5
50
2
76
2
32
3.5
per cent
watts
4
44
36
Maximum Circuit Values:
Grid-No.l-Circuit Resistance:
For fixed-bias operation· . ....................................... .
0.1 max megohm
For cathode-bias operation . ..................................... .
0.5 max megohm
• The dccomponent must not exceed 100 volts.
• The type of input coupling network used should not introduce too much resistance in the grid-No.1
circuit; Transformer- or impedance-cQupling'dev-ices are~recommended.
PUSH-PULL CLASS AB! AMPLIFIER
Grid No.2. of Each Tube Connected to Tap on Plate Winding of Output Tramform ..
Maximum Ratings, for 7027-A, (Design-Maximum Values):
PLATE AND GRID-No.2 SUPPLY VOLTAGE ........................... " ..
600 max
PLATE DISSIPATION ................................................. .
35 max
GRID-No.2 INPUT .................................................. .
4.5 max
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
200 max
Heater positive with respect to cathode ......................... , ..
200"max
volts
watts
watts
volts
volts
Typical Operation (Values are for two tubes):
Plate Supply Voltage ............................................... .
Grid-No.2 Supply Voltage .......................................... "
Cathode"Bias Resistor .............................................. .
Peak AF Grid-N o.l-to-Grid-N 0.1 Voltage ............................. .
Zero-Signal Cathode Current ........................................ .
Maximum-Signal Cathode Current ................................... .
Effective Load Resistance (Plate to plate) ............................. .
Total Harmonic Distortion . ......................................... .
Maximum-Signal Power Output ...................................... .
410
volts
volts
ohms
volts
*
220
68
134
155
8000
1.6
rna
rna
ohms
per cent
watts
24
Maximum Circuit Value:
Grid-N o.l-Circuit Resistance:
For cathode-bias operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
0.5 max megohm
• The dc component must not exceed 100 volts.
Obtained from taps on the primary winding of the output transformer. The taps are located on each
side of the center tap (B+) so as to apply 43 per cent of the plate signal voltage to grid No.2 of each
output tube.
*
AVERAGE CHARACTERISTICS
TYPE 7027-A
[,p:6.3 VOLTS
CRID-N~2 VOL T$=300 -+----jI---+--+--I---+--t~--+--+----jf----1
:-.=t.
100
200
300
400
bOO
"~CI~O
700
bOO
PLATE VOLTS
Q2C"-4-IOI33T
POWER PENTODE
7189
474
Miniature type used as power amplifier tube in high-fidelity audio equip-·
ment. Outline 8E, OUTLINES SECTION. Tube requires miniature ninecontact socket and may be mounted
in any position. Heater volts Cac/dc),
6.3; amperes, 0.76.
H
========= Technical Data
CLASS A, AMPLIFIER
Characteristics:
Plate Voltage. . . . . . . . . . .
. ......................... .
Grid-No.2 (Screen-Grid) Voltage ............................. .
Grid-No.1 (Control-Grid) Voltage ............................ .
Mu-Factor, Grid No.2 to Grid No.1. .................... .
Plate Resistance (Approx.) ............................. .
Transconductance .................................................. .
Plate Current ...................................................... .
Grid-N 0.2 Current ................................................. .
250
250
-7.3
19.5
40000
11300
48
5.5
volts
volts
volts
ohms
~mho8
rna
rna
PUSH-PULL CLASS AB, AMPLIFIER
Maximum Ratings, (Design-Center Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 VOLTAGE ............................... .
PLATE DISSIPATION . . . . . . . . . . . . . . , . . . . . . . . . . . . . . . . . . .
400
300
65
12
ZERO-SIGNAL GRID-No.2 INPUT .................... .
MAXIMUM-SIGNAL GRID-No.2 INPUT ................ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ......... .
Heater positive with respect to cathode ............... .
100 max
100 max
CATHODE CURRENT . . . . . . . . . . . . • . . . . . . . . . . . . . . . • . . . . . . . . .
max
max
max
max
2 max
4 max
max
max
max
volts
volts
rna
watts
watts
watts
100 max
100 max
volts
volt.
• max
65
12
2
4
Grid-No.!
Special
Connection •
375
Typical Operation, (Values are for two lubes):
Plate Supply Voltage ............................ .
Plate Voltare .......................................... .
Grid-No.2 Supply Voltage ............................... .
Grid-No.2 Voltage ...................................... .
Grid-N 0.1 Voltage ..................................... .
Cathode-Bias Resistor ................................. ..
Peak AF Grid-No.1 Voltage ............................. .
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
Effective Load Resistance (Plate-to-plate) ................. .
Total Harmonic Distortion .............................. .
Maximum-Signal Power Output. . .
. ................. .
Grid-No.2
Special
Connection •
375 max
400
300
-15
14.8
15
105
1.6
25
8000
4
24
volt.
volts
•
•
220
17.7
70
81
11000
3
16.5
volts
volts
ohms
volts
rna
rna
rna
rna
ohms
per cent
watts
Maximum Circuit Values:
Fixed Bias
Cathode Bias
Grid-N o.l-Circuit Resistance ............................ .
0.3 max
1 max megohm
• Grid No.2 of each tube connected to tap on plate winding of output transformer.
• Obtained from taps on primary winding of the output transformer. The taps are located on each side
of the center tap (B+) so as to supply 43 per cent of the plate signal voltage to grid No.2 of each output
tube.
MEDIUM-MU TRIODESHARP-CUTOFF PENTODE
Miniature type used in a wide
variety of applications in high-quality,
high-fidelity audio equipment, par~!e=9~9;'"
ticularly in phase-splitters, tone-conPT
GT
trol amplifiers, and high-gain voltage
amplifiers in which low hum and reduced noise are required. Outline 8B, OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
mounted in any position. For operation as resistance-coupled amplifier, refer to
RESISTANCE-COUPLED AMPLIFIER SECTION. In direct-coupled voltageamplifier phase-splitter circuits, the pentode unit should drive the triode unit.
H
7199
HEATER VOLTAGE (AC/DC) ........................................... .
HEATER CURRENT .................................................. .
6.3
0.45
volts
ampere
475
RCA Receiving Tube Manual
DIRECT INTERELECTRODE CAPACITANCES:
Triode Unit:
Grid to Plate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . ... .
Grid to Cathode and Heater ....................................... .
Plate to Cathode and Heater ....................................... .
Pentode Unit:
;
Grid No.1 to Plate ................................................ .
Grid No.1 to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield ..
Plate to Cathode, Heater, Grid No.2, Grid No.3, and Internal Shield .....
pf
pf
pf
2
2.3
0.3
0.06 max
5
2
pf
pf
pf
Equivalent-Noise and Hum Voltage Referenced to Grid:
Triode Unit
Pentode Unit
35I'volts
Median Value (rms) .................................... .
lot
I'volts
Maximum Value (rms) .................................. .
150t
100t Measured in "true rms" units under the following conditions: heater volts (ac), 6.3; center tap of
heater transformer connected to ground; plate-supply volts, 250; plate load resistor, 0.1 megohm;
cathode resistor, 1500 ohms; grid resistor, 0.05 megohm; and amplifier covering frequency range between 25 and 10000 cycles per second .
• Same conditions as for triode unit except: grid-No.2 supply volts, 250; grid-No.2 resistor, 0.33 megohm; grid-No.2-bypass capacitor, 0.22 I'f; cathode resistor, 1200 ohm.: and grid-No.1 resistor, 0.05
megohm.
CLASS Al AMPLIFIER
Triode
Unit
330 max
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ........................................ .
GRID-No.2 (SCREEN-GRID) VOLTAGE ....................... .
GRID-No.2 SUPPI,Y VOLTAGE ............................. .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value .... .
PLATE DISSIPATION ..................................... .
GRID-No.2 INPUT:
For grid_No.2 voltages up to 165volts .................. .
For grid-No.2 voltages between 165 and 330 volts ........ .
PEAK HEATER-CATHODE VOLTAGE:
Heater positive with respect to cathode ................ .
Heater negative with respect to cathode ................. .
Characteristics:
Plate Supply Voltage ............................... .
Grid-No.2 Supply Voltage ........................... .
Grid-No.1 Voltage .................................. .
Cathode-Bias Resistor ............................... .
Amplification Factor .................. : ............. .
Plate Resistance (Approx.) .......................... .
Transconductance . ................................. .
Grid-No.1 Voltage (Approx.) for plate current of 10 I'a .. .
Plate Current ...................................... .
Grid-No.2 Current .................................. .
AVERAGE
o max
2.4 max
Pentode
Unit
330 max
volts
See curve page 70
330 max
volts
o max
volts
3 max
watts
0.6 max
watt
See curve page 70
200 max
200-max
Triode
Unit
215
200 max
200-max
Pentode
Unit
100
220
50
130
volts
volts
volts
ohms
-8.5
17
0.0081
2100
-40
9
1000
62
1
1500
-4
1.1
0.35
0.4
7000
meghom
pmhos
volts
ma
ma
12.5
3.5
CHARACTERISTICS
TRIODE UNIT
25
TYPE 7199 1
Ef': 0.3 VOLTS
20
0
"
",'i
:::::;
:"
1!
/
/
~
".:J
.. 15
!i!
:
i
.......
~ 10
/
/
/
/
V
/
/
/
/
/
/
I
V
/
/
,~
VL
,,1
V / ./VV
V L V V ./'"
/
50
100
ISO
200
PLATE
476
,"'L
_t-
V ./' ./' ~ ~ v::: ~ ~V --- --/
o
/
,./
/
250
VOLTS
)!-
300
350
volts
volts
400
92cw-"'3 T
========= Technical Data =========
Maximum Circuit Values:
Triode Unit Pentade Unit
Grid-No.1-Circuit Resistance:·
0.5 max
0.25 max megohm
For fixed-bias operation ............................... .
1.0 max
1.0 max megohm
For cathode-bias operation ............................. .
• The de component must not exceed 100 volts.
* If either unit is operated at maximum rated conditions, grid-N o.l-circuit resistance for both units
should not exceed the stated values.
AVERAGE
TYPE
...
::l
,.-
~ 20
:J
=
rJ
OJ
~199J
Ef 6.3 VOLTS
GRID-N22 VOL 1s
0
=130
/
~
,./
71
t! 15
..
N
1\ 1.
Z
o
ir
'" 10
o
5
GRID-N!1 VOLTS ECI=-I
IA-
\
.
::!
CHARACTERISTICS
PENTODE UNIT
25
I
\
I~
....
."'"" I
It:
-
ICz ..:.
- r-- -
-2
EC,
'--
-I
-3
-.
-3
o
50
100
150
200
PLATE
2'0
300
-5
350
VOLTS
400
G2CIoI-nOIT
HTI
DUAL TRIODE
Miniature type used for combined
first- and second-stage audio preamplification in high-fidelity phonograph
or tape equipment. Tube has high-mu
unit and medium-mu unit. Outline 8B,
OUTLINES SECTION. Tube requires miniature nine-contact socket and may be
operated in any position. Heater volts (ac/dc), 12.6 (series), 6.3 (parallel); amperes, 0.15 (series), 0.3 (parallel).
7247
CLASS Al AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID VOLTAGE:
Negative-bias value ................................ .
Positive-bias value . ................................ .
CATHODE CURRENT . . . . . . . . . . . . . . . . • • . • . . . . . . . . . . . . . . . . . .
PLATE DISSIPATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode . .............. .
Heater positive with respect to cathode ............... .
Characteristics:
Plate Voltage .............................. .
Grid Voltage .............................. .
Amplification Factor ........................ .
Plate Resistance (Approx.) .................. .
Transconductance . ......................... .
Plate Current .............................. .
Grid Voltage (Approx.) for plate current of 10 I'a
Unit No.1
100
250
. -1
-2
100
100
80000
62500
1250
1600
0.5
1.2
Maximum Circuit Values:
Grid-Circuit Resistance:
For fixed-bias operation ............................. .
For cathode-bias operation .......................... .
Unit
No.1
330 max
Unit
No.1t
330 max
volts
55 max
o max
1.2 max
55 max
o max
22 max
3 max
volts
volts
rna
watts
200 max
2000 max
200 max
2000 max
volts
volts
Unit No.1t
100
250
0
-8.5
20
17
6500
7700
3100
2200
11.8
10.5
-24
Unit
No.1
15 max
volts
volts
ohms
I'mhos
ma
volts
Unit
No.1t
0.5 max megohms
1 max megohm
477
RCA Receiving Tube Manual
Hum Output Voltage:
/Lvolts
Average Value (rms, cathode bypassed)- ....... .
.8
/Lvolts
Maximum Value (rms, cathode unbypassed)-...
. .......... .
7
o The de component must not exceed 100 volts.
• Measured in "true rms" units under the following conditions: heater volts Cae). 6.3 (parallel connection); center tap of heater transformer connected to ground; de plate supply volts, 250; plate load
resistor, 0.1 megohm; cathode resistor, 2700 ohms; cathode-bypass capacitor, 100 J,Lf; grid resistor, 0
ohms; amplifier covering frequency range of 25 to 10000 cps.
• Same conditions as above, except that cathode resistor is unbypassed and grid resistor is 0.05 megohm.
POWER PENTODE
7355
Glass octal type used in the power-output stage of high-fidelity audiofrequency amplifier systems. Outline
14E, OUTLINES SECTION. Tuberequires octal socket and may be mounted
in any position. Heater volts (ac/dc),
6.3; amperes, 0.8.
'K
~
---
'p 3
::: 5
6 GI
H 2
7 H
8 G2
CLASS A, AMPLIFIER
Maximum Rating., (Design-Maximum Value.):
PLATE VOLTAGE ...................... .
GRiD-No.2 (SCREEN-GRiD) VOLTAGE ..... .
GRID-No.1 (CONTROL-GRID) VOLTAGE, Positive-bias value ...
PLATE DISSIPATION....
. " ."
., . . . . . .
DC GRiD-No.2 INPUT.....
. ........................... .
AVERAGE CATHODE CURRENT. .
. ............ .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode .....
Heater positive with respect to cathode ..
500 max
400 max
o max
18 max
3.5 e max
100 max
volts
volts
volts
watts
watts
ma
200 max
200-max
volts
volts
Typical Operation and Characteristics:
Plate Voltage ................................... .
Grid-No.2 Voltage ....... .
Grid-No.1 Voltage ............ .
Peak AF Grid-No.1 Voltage ... .
Plate Resistance (Approx.) . . . . . . . . . . . . . . .
. ......... .
Transconductance. . . . . . . . . . . . . . . . . .
. ........ .
Zero-Signal Plate Current. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. .......... .
Maximum Signal Plate Current ....................... .
Zero-Signal Grid-N 0.2 Current. . . . .
. .............. .
Maximum-Signal Grid-No.2 Current... ..
. ....................... .
Load Resistance ............................................. .
Total Harmonic Distortion (Approx.) ................................ .
Maximum-Signal Power Output ...................................... .
Grid-No.1 Voltage (Approx.) for plate current of 500 /La .............. .
250
225
-15
15
42000
7600
62
74
3.2
16.5
2500
15
9
-35
volts
volts
volts
volts
ohms
.umhos
rna
ma
ma
ma
ohms
per cent
watts
volts
Maximum Circuit Value.:
Grid-No.1-Circuit Resistance:
For fixed-bias operation .... .
For cathode-bias operation ... .
0.3 max
1 max
megohm
megohm
PUSH-PULL CLASS AS, AMPLIFIER
Maximum Rating', (Same as for Clas. A, amplifier):
Typical Operation (Values are for two tubes):
Plate Voltage.
. ........ .
300
400
Grid-No.2 Voltage ........... .
250
300
-21
Grid-No.1 Voltage ... .
-34
Peak AF Grid-No.1 Voltage .. .
42
60
Zero-Signal Plate Current. ..................... .
100
56
Maximum-Signal Plate Current .... .
185
175
Zero-Signal Grid-No.2 Current ............ .
5.5
3.5
Maximum-Signal Grid-No.2 Current. ...... .
24
24
Effective Load Resistance (Plate-to-plate) ........ .
4000
5000
Total Harmonic Distortion .............................. .
2
6
Maximum-Signal Power Output .................. .
28.5
40
• Grid-No.2 input may reach 7 watts during peak levels of speech and music signals.
• The de component must not exceed 100 volts.
478
volts
volts
volts
volts
rna
ma
ma
rna
ohms
per cent
watts
Technical Data
G2
BEAM POWER TUBE
~
4
~
1:1
P 3
H
2
7
H
18 K
NC
=========-
1:3
Glass octal type used as output amplifier tube in high-quality sound systems. Outline 14C, OUTLINES SECTION. Tube requires octal socket and
may be mounted in any position. Heater
volts Cac/dc), 6.3; amperes, 0.45.
7408
CLASS A, AMPLIFIER
Maximum Ratings, (D.sign-Maximum Values):
PLATE VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID-No.2 (SCREEN-GRID) VOLTAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GRID-No.2 INPUT . . . • . . . . . . . . . . . . . . . . . . . . . . • . . . . . . . . . • . . . . . . . . . . . . . .
PLATE DiSSiPATION . • . . . . . . . . . . . . . . . '" . • . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative.with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
max
max
max
max
volts
volts
watts
watts
200 max
200·max
volts
volts
350
315
2.2
14
Typical Operation and Characteristics:
Plate Vol tage .......................................... .
Grid-No.2 Voltage ...................................... .
Grid-No.1 (Control-Grid) Voltage ........................ .
Peak AF Grid-No.1 Voltage ............................. .
Zero-Signal Plate Current ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
Plate. Resistance (Approx.) .............................. .
Transconductance ...................................... .
Load Resistance ....................................... .
Total Harmonic Distortion .............................. .
Maximum-Signal Power Output .......................... .
60
250
0
10022-
250
250
-12.5
12.5
45
47
4.5
7
50000
4100
5000
7
4.5
volts
volts
volts
volts
rna
rna
rna
rna
ohms
I'mhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-No.1 Circuit Resistance:
O. 1 max megohm
For fixed-bias operation ......................................... .
0.5 max megohm
For cathode-bias operation ...................................... .
• The de component must not exceed 100 volts.
• This value can be measured by a method involving a recurrent waveform such that the maximum
ratings of the tube will not be exceeded.
H4
~
H
3
:
b
G2
.SHARP-CUTOFF PENTODE
7543
Miniature type used in compact
audio equipment, eSilecially in lowG3
K
hum, low-microphonic, high-gain, reIS
I
sistance-coupled-amplifier appliGI
cations. Outline 7B, OUTLINES SECTION. This type is identical with miniature type 6AU6 except that it has a controlled hum characteristic.
2
7
Hum Output Voltage:
Average Value (rms, cathode bypassed). ...............................
1.2t
millivolts
Average Value (rms, cathode unbypassed). . . . . . . . . . . . .. .. .. .. .. .. .. .. ..
0.9millivolt
t Measured in "true rms" units under the following conditions: heater volts (ac), 6.3; center tap of
heater transformer connected to ground; plate and grid-No.2 supply volts, 250; plate load resistor, 0.27
megohm; grid No.3 and internal shield connected to cathode at socket; grid-N 0.2 resistor, 0.68 megohm;
grid-No.1 resistor, 0.1 megohm; cathode resistor, 1000 ohms; grid resistor of following stage, 10 megohms; and stage gain, 340
• Same conditions as above except cathode resistor is unbypassed and stage gain is 110.
479
RCA Receiving Tube Manual
POWER PENTODE
7591
Glass octal type used as audiofrequency power-output tube in highquality audio applications. Outline
14C, OUTLINES SECTION. Tuberequires octal socket and may be mounted
in any position. Heater volts (ac/de),
6.3; amperes, 0.8.
~
G~
p 3
G:,K
:::'
6 G,
H 2
7 H
I
8 G2
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum Values):
PLATE VOLTAGE ............................................. .
GRID-No.2 (SCREEN-GRID) VOLTAGE .................................. .
CATHODE CURRENT ................................................. .
PLATE DISSIPATION ................................................. .
GRID-No.2 INPUT .................................................. .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathode ........................... .
550 max
440 max
85 max
19 max
a.3-max
volts
volts
rna
watts
watts
200 max
200·max
volts
volts
Typical Operation and Characteristics.
Plate Voltage ...................................................... .
Grid-No.2 Voltage .................................................. .
Grid-No.1 (Control-Grid) Voltage .................................... .
Peak AF Grid-No.1 Voltage ......................................... .
Zero-Signal Plate Current ........................................... .
Maximum-Signal Plate Current ...................................... .
Zero-Signal Grid-No.2 Current ....................................... .
Maximum-Signal Grid-No.2 Current .................................. .
Triode Amplification Factor* ........................................ .
Plate Resistance (Approx.) .......................................... .
Transconductance . ................................................. .
Load Resistance. . . . . ........................... , .................. .
Total Harmonic Distortion .......................................... .
Maximum-Signal Power Output ...................................... .
300
300
-10
10
60
75
8
15
16.8
29000
10200
3000
13
11
volts
volts
volts
volts
ma
ma
ma
ma
ohms
I'mhos
ohms
per cent
watts
Maximum Circuit Values:
Grid-N o.l-Circuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
0.3 max megohms
1 max megohm
PUSH-PULL CLASS AB, AMPLIFIER
MaxImum Ratings. (Same as for Class A, AmplifIer)
Fixed Bias
Typical Operation, (Value. are!or two tubes):
Cathode Bias
Plate Supply Voltage ............................. .
350
450
450
Grid-No.2 Supply Voltage ........................ .
350
400
400
Grid-No.1 Supply Voltage., ...................... . -15.5
-21
Cathode-Bias Resistor (Common to both cathodes) .. .
200
Peak AF Grid-No.1-to-Grid-No.1 Voltage .......... .
31
42
28
Zero-Signal Plate Current ........................ .
66
82
92
Maximum-Signal Plate Current ................... .
130
144
94
13
9.4
Zero-Signal Grid-No.2 Current .................... .
11.5
Maximum-Signal Grid-No.2 Current ............... .
28.6
30
22
Effective Load Resistance (Plate-to-plate) .......... .
6600
6600
9000
Total Harmonic Distortion ...................... ..
2
1.5
2
Maximum-Signal Power Output ................... .
30
45
28
- Grid-No.2 input may reach 6 watts during peak levels of speech and music signals.
• The dc component must not exceed 100 volts.
* Triode connection, grid No.2 connected to plate.
BEAM POWER TUBE
7695
480
N eon oval type used as af poweramplifier tube. Outline 11C, OUTLINES SECTION. Tube requires
neonoval nine-contact socket and may
be mounted in any position. Heater
volts (ac/de), 50 volts; amperes, 0.15.
volts
volts
volts
ohms
volts
ma
ma
rna
ma
ohms
per cent
watts
========_. Technical Data ========CLASS A, AMPLIFIER
Maximum Ratings,. (Design-Maximum Values):
PLATE VOLTAGE .................................................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE,.. " ............................... .
GRID-No.2 INPUT .................................................. .
PLATE DISSIPATION •.................................................
PE\AK HEATER-CATHODE VOLTAGE:
Heater negative with respect to cathode ........................... .
Heater positive with respect to cathede ........................... .
Typical Operation and Characteristics:
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Grid-No.1 (Control-Grid) Vol~age ........................ .
Cathode-Bias Resistor .................................. .
Peak AF Grid-No.1 Voltage ............................. .
Zero-Signal Plate Current. ; .............................. .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
Plate Resistance (Approx.) .............................. .
Transconductance . .. :-.................................. .
Load Resistance ........................................ .
Total Harmonic Distortion .............................. .
Maximum-Signal Power Output .......................... .
Fized
Bias
130
ISO
-11
11
100
108
5
15
7000
11000
1100
11
4.5
Maximum Circuit Values:
Grid-No.1-Cireuit Resistance:
For fixed-bias operation ......................................... .
For cathode-bias operation ...................................... .
• The dc component must not exceed 100 volts.·
PUSH-PULL CLASS.AB, AMPLIFIER
Maximum Ratings, (Same as for Class A, Amplifier):
Typical Operation,'(Values are for two lubes):
Plate Supply Voltage ................................... .
Grid-No.2 Supply Voltage ............................... .
Grid-No.1 Voltage ...................................... .
Cathode-Bias Resistor ................................... .
Peak AF Grid-No.1-to-Grid-No.1 Voltage ................. .
Zero-Signal Plate Curren t ............................... .
Maximum-Signal Plate Current .......................... .
Zero-Signal Grid-No.2 Current ........................... .
Maximum-Signal Grid-No.2 Current ...................... .
Effective Load Resistance (Plate-to-plate) ................. .
Total Harmonie Distortion .............................. .
Maximum-Signal Power Output ........................... .
Fized
Bias
130
130
-12
22.6
195
220
150
150
2.5
16
max
maz
max
max
volt.
volts
watts
watts
200 max
volts
volts
200~ax
Cathode
Bia.
140
140
100
11.S
100
100
5
14
1100
11
4.5
0.1 max megohm
0.5 max megohm
Cathode
Bia.
140
140
50
22.6
210
220
9
9
24
1800
20
1500
4
10
6
10
volts
'Zolts
volts
ohms
volts
rna
rna
rna
rna
ohms
I'mhos
ohms
per cent
watt.
volts'
volts
volts
ohms
volts
rna
rna
rna
rna
ohms
per cent
watts
H
POWER PENJODE
N ovar type used in output stages
of high-fidelity audio amplifiers or
radio receivers; used in applications
requiring relatively large power output. Outline lOC, OUTLINES SECTION. Tube requires novar nine-contact socket and may be operated in any position. It is especially important that this tube, like. other power-handling tubes, be
adequately ventilated.
7868
HEATER VOLTAGE (Ae/DC) ............................................ .
HEATER CURRENT ................................................... .
DIRECTINTERELECTRODE CAPACITANCES (Approx.) :
Grid No.1 to Plate ............................................. .
Grid No.1 to Cathode, Heater, Grid No.2, and Grid No.3 ........... .
Plate to Cathode, HeateF, Grid No.2, and Grid No.3 ................ .
6.3
0.8
volts
ampere
0.15
11
4.4
pC
pI
pC
481
RCA Receiving Tube Manual-
======
CLASS A, AMPLIFIER
Maximum Ratings, (Design-Maximum System):
PLATE VOLTAGE ................... .
GRID-No.2 (SCREEN-GRID) VOLTAGE ..
550.-max
440. max
19 max
PLATE DISSIPATION .. .
90. max
volts
volts
watts
watts
rna
20.0. max
20.0.°max
240. max
volts
volts
°C
a.a-max
.GRID-No.2 INPUT .... .
DC CATHODE CURRENT .......... .
PEAK HEATER-CATHODE VOLTAGE:
Heater negative_with respect to cathode ....
Heater positive with respect to cathode.
BULB TEMPERATURE (At hottest point) ...
Typical Operation and· Characteristics:
Plate Supply Voltage ...... .
Grid-No.2 Voltage ................ .
Grid-No.1 (Control-Grid) Voltage ..
Peak AF Grid-No.1 Voltage.
Zero-Signal Plate Current .....
Maximum-Signal Plate Current.
Zero-Signal Grid-No.2 Current ...
Maximum-Signal Grid-No.2 Current.
Plate Resistance (Approx.) .
Transconductance.
. ........... .
Effective_Load Resistance ................ .
Total Harmonic Distortion .... .
Maximum-Signal Power,Output.
.....
"','.
. ..........
. Maximum Circuit Values:
Grid-No~l-Circuit Resistance:
For fixed-bias operation.
For cathode-bias operation ..
30.0.
30.0.
-10.
10.
60.
75
8
15
290.0.0.
10.20.0.
30.0.0.
13
11
3 max
1 max
PUSH~PUll
volts
volts
volts
volts
rna
rna
rna
rna
ohms
.umhos
ohms
per cent
watts
megohm
megohm
CLASS AS , AMPLIFIER
Maximum Ratings,.(Same as for Class A, Amplifier)
Fixed Bias
Typical Operation (Values are for two tubes):
Plate Supply Voltage .....
30.0.
350.
40.0.
450.
Grid-ND.2 Supply Voltage ........... 30.0.
350.
350.
350.
GridcNo.1 Voltage ..
. ........ -12.5 -15.5
-16 -16.5
Cathode-Bias Resistor (Common
to both cathodes) ......
Peak AF· Grid-No.1-to-Grid-No.1
25
31
33
32
Voltage ............
74
72
64
Zew-Signal Plate Current ......
60.
Maximum-Signal Plate Current.
116
130.
135
142
Zero-Signal Grid-No,2 Current ....
10.
9.5
8
7.2
"Maximum-Signal Grid-No.2 Current.
28
32
28
26
Effective Load Resistance
660.0.
660.0.
660.0.
660.0.
(Plate-to-plate) .........
5
2.5
2
2.5
Total Harmonic Distortion ...
24
30.
34
38
Maximum-Signal Power Output ..
450.
40.0.
-21
Cathode
Bias
450.
40.0.
volts
volts
volts
70.
ohms
42
40.
145
5
30.
31
86
94
10.
20.
volts
rna
rna
rna
rna
660.0.
5
44
10.0.0.0.
2
28
ohms
per cent
watts
PUSH'PUll CLASS AS, AMPLIFIER
Grid No.2 of Each Tube Connected to Tap
on Plate Winding of Output Transfor.mer*
Maximum Ra.tings: (Same as for Class A, Amplifier)
Fixed
. Typi'cal Operation (Values are for two tubes):
Bias
Plate Supply Voltage. . . . .
40.0.
Grid-Na.2 Supply Voltage.
*
Grid-No.1 Voltage..
..
-20..5
Cathode-Bias Resistor (Common to both cathodes) ...
Peak AF Grid-No.1-to-Grid-No.1 Voltage.
41
Zero-Signal. Plate Current
60.
115
Maximum-Signal Plate Current.
Zero-Signal Grid-N 0.2 Current. ..... .
8
18
Maximum:-Signal Grid-No.2 Current ....... .
660.0.
Effective Load Resistance (Plate-to-plate) .. .
2.5
Total H'armonic Distortion ..
'23
Maximum-Signal Power Output. ,
Cathode
Bias
425
volts
volts
volts
185
ohms
42
volts
88
rna
1'0.0.
rna
12
rna
16
rna
660.0.
ohms
3.5
per cent
21
watts
• In push-pull circuits where the grid No.2 of each tube'is cOt1nected., to a, tap. on the plate winding of
.the output transformer, this maximum rating is 440 volts .
• ,Grid No.2 input may reach 6, watts during peak levels -of speech and music signals.
a The de eom'ponent must not exceed 100 volts.
*-Grid· No.2 supply voltage is obtained -from taps on the primary winding of the output transformer.
The-taps are located on each side of the cent.er tap (B+) so as to apply 50 per cent of the plate signal
voltage to. the grid No.2 of each output tube.
482
*
=---------------------- Technical Data ------------------------AVERAGE CHARACTERISTICS
TYPE 1868
E"6.~ VOlTS
GRID-No.2 VOLTS
'~OO
GRID-No.1 VOLTS
I
1
Ec' O
x~
~
n
LIt16 • llYs
E
M
70
Cavity Cap
12L
16000
FGm
14~
x 10%,
E
M
70
Cavity Cap
12L
16000
FGm
14J.i. IOU
M
M
70
Cavity Cap
12N
IBOOO
14%.10%
E
M
70
Metal-Shell Lip
12M
16000
Yes
Yes
Yes
Yes
Yes
~
@l
@l@l
@l
No
FFG
Yes
Yes
Yes
Yes
FG
15Ys x 1~
E
M
114
Cavity Cap
BJK
20000'>
No
FG
1574' x 12
E
M
114
Cavity Cap
BHR
20000·
No
FG
lSYsx12
E
M
114
Cavity Cap
BHR
17600,,"
No
FG
15Ys.12
E
M
114
Cavity Cap
7FA
19BOO"
No
®
No
FFG
17% Dia.
M
M
Metal-Shell Lip
12D
16000
Yes
@l@l
@l
@l
@l
Yes
Yes
Yes
Yes
Yes
66'
FG'
lS}i x 12h6
E
M
114
Cavity Cap
BHR
20000·
No
FG
lSVs x 12
E
M
114
Cavity Cap
BHR
23000·
No
FG
lSYs x 12
E
M
114
Cavity Cap
BHR
23000·
No
FG
17
x 12%
M
M
70
Cavity Cap
12N
IBOOO
Yes
FG
17
x 12%
E
M
70
Cavity Cap
12L
16000
Yes
Active RCA· Picture·Tube Types shown
here can replace more than 300 different
types of industty pictw'c tubes. The RCA
Picture Tube Replacement and Interchanleability Chart is available on request.
Unless otherwise noted, all picture tubes
listed have 6.3-volt, 600-milliampere
beaters.
~
Metal rectangular.
•
Spherical, unless otherwise specified.
®
Metat round •.
b
CL
Clear glass.
FG
FilterglaSl.
ANODE is defined as the electrode, or tbe
electrode in combination with one or more
additional electrod(ls connected within the
tube to it, to which is applied the hiihest
de voltage for accelerating the electrons in
the beam prior to its dellection.
Glass feetancular.
M
Magnetic.
Glass round.
E
Electrostatic.
d
Projection type.
484
FFG Frosted Filterglass.
Design·Center Value, unless otherwise in·
dicated.
-,-- .
---------------Picture Tube Characteristics ---------------
@
TwI
fIItIIto
-
........
.1.ck.. n....White Typel
[Q)
Yes
21AWP4
21C.P4A
21CQP4
21DEP4A
21DFP4
21DLP4
21 DSP4
21 EP4.
21EQP4
21 EVP.r
21FAP4
21FDP4
21FP4C
21MP4
21WP4A
21XP4A
21YP4A
21ZP4.
23AHP4
23ALP4'
23IJP4
23IKP4
231LP4
23CP4
23EP4
23FP4A
23JP4'
23YP4
24AEP4
24AHP4
24ATP4
24AUP4
241AP4
24CP4A
27MP4
271P4
_SIll
I-
.-
F...... IIIIIIcIiII
11-
5:
.
....... ,
filii
II1II
Y1IIIp
::.
Tnlll
l1li11
(All*b)c
'Ills
I....TIIII
II.....
RIIUIII
19,," x IS,,"
M
M
90
Cavity Cap
12N
lBOOO
18~x
M
M
70
Metal-Shell Lip
120
lBOOO
Yes
19,," x 15,,"
E
M
72
Ca.vity -Cap
12L
20000
Yes
lI'G
19,," x 15,,"
M
M
72
Cavity Cap
12N
18000
Yes
lI'G
19,," x 15,,"
E
M
90
Cavity Cap
12L
20000
No
Yeo
FG
19,," x 15,,"
E
M
110
Cavity Cap
7FA
lBOOO
No
Yes
FG
19,," x IS,,"
E
M
110
Cavity Cap
8HR
20000
No
Yes
lI'G
19,," x IS,,"
E
M
110
Cavity Cap
8HR
18000
No
Yes
FG
·19,," x IS,,"
E
M
Cavity Cap
I2L
20000
No
Yea
lI'G
19,," x IS",
E
M
90
go
Cavity Cap
12L
20000P
No
Yea
Fa-
19~xI3%
M
M
70
Cavity Cap
12N
18000
Yes
Yes
lI'G
19,," x IS,,"
E
M
110
Cavity Cap
8JR
18000
No
Yeo
lI'G
19,," x IS,,"
E
M
1I0
Cavity Cap
BJK
20000>
No
Yeo
FG
19,," x IS,,"
E
M
110
Cavity Cap
8JR
22000>
No
21AMP4A
21AP4
21 AVP4.
F........
.....
lI'G
~
No
FFG
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
Yes
FG
Yes
Yes
[I!I
[Q)
[Q)
[Q)
13',,"
Yes
Yes
FG
19,," x IS,,"
E
M
110
Cavity Cap
8KW
20000h
No
Yes
Fa-
19~x13%
E
M
70
Cavity Cap
I2L
lBOOO
Yes
~
No
FFG
E
M
70
Mctal-Sbe11 Lip
12M
16000
Y ..
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
[Q).
[QJo
[Q).
[Q).
[Q)
[Q).
[Q).
[Q)
[Q)
[Q)
[Q)
[Q)
[Q)
Yeo
lI'G
17%xI3%
M
M
70
Cavity Cap
12N
lBOOO
Yes
Yea
lI'G
17%x 13%
E
M
70
Cavity Cap
12L
18000
Yes
Ye.
lI'G
19,," x 1#16
E
M
70
Cavity Cap
12L
18000
Yes
Yea
lI'G
19,," x 1#16
M
M
70
Cavity Cap
12N
18000
Ye.
Yea
lI'G
19~x IS~
E
M
92
Cavity Cap
12L
2200Ql0
No
Yes
lI'G
19~
E
M
114
Cavity Cap
8HR
22000h
No
18~x
13',,"
x IS~
Yes
lI'G
19~xIS~
E
M
92
Cavity Cap
I2L
2S00ohP
No
Yes
lI'G
l~xlS~
E
M
92
Cavity Cap
12L
2S00ohP
No
Yes
FG<
l~xlS~
E
M
92
Cavity Cap
12L
No
Yes
lI'G
l~x1S~
E
M
110
Cavity Cap
SHR
25000""
22001)10
Yes
lI'G
l~xIS~
E
M
liD
Cavity Cap
8K1>
22000hP
No
Yes
lI'G
19~ x 1S~
E
M
1I4
Cavity Cap
SHR
23500>
No
Yes
lI'G
19~x1S~
E
M
1I0
Cavity Cap
7FA
22000'"
No
Yes
lI'G
l~x1S~
E
M
92
Cavity Cap
12L
22000>
No
Yes
lI'G
21l{,x 16%
E
M
90
Cavity Cap
12L
20000
No
Yes
lI'G
21l{,x 16%
M
1I0
Cavity Cap
8HR
20000
No
Yes
lI'G
21l{,x 16%
E
E
M
90
Cavity Cap
121.
20000P
No
Yes
lI'G
21l{,x 16%
E
M
90
Cavity Cap
12L
20000
No
Ye.
lI'G
21l{, x 16%
M
110
Cavity Cap
SHR
20000P
No
Yes
lI'G
21l{,x 16%
E
M
M
90
Cavity Cap
12N
20000
Yes
No
~
Yea
FFG
18~
M
M
90
Metal-SheU Lip
120
lBOOO
Yes
[Q)
Yes
lI'G
24~xIB%
M
M
90
Cavity Cap
12N
20000
Yes
@
@
@
.@
@w
Ye.
CL
lI~x
8%
E
M
45·
l4etal Flange
20A
20000
No
Yes
lI'G
19,," x
15~
E
M
70·
Metal Shell
14AH
25000
No
Yes
lI'G
19~x IS~
E
M
70· Two Cavity Caps 14AL
25000
No
Yes
lI'G
19~x15%
B
M
70·
Cavity Cap
14AU
27500h
No
Yes
Fa'
19~xI5~
E
M
700
Cavity Cap
14AU
27500>
No
23l{, x
Color Typel
15GP22"
r,zlAXP22A'
21CYP22Au
21FIP22'
21FJP22'
•
Horizontal dd1cctioa aqIe.
,
Typical deflection f.elon (volts dc:/Io.) lot
ultor voItII&e ol6iOOO volb:
" 6.3-vo1t... 4SO-miIHamperc heater.
.. CylindricailacepJlIte.
"
III. .•• 4·volt. 4S0-milliampere beater.
"
I
Deaicn-MaK'imum Value.
2.fi8-volt. 4S0-miUiampere beater.
Bipanel type..
P RcIClTed to Grid No. 1: CathocSe-Drive
Service: Hal 10w lfid-2 voItqe ratine.
r Treated to reduce lJ)eCuiar ~ction.
q
•
I
2.3S-volt, 6iOQ.milHampere heater.
This type has a 8at~ aluminiled f filterc1U1 f
~-dot screen plate.
6.3-voIt, l.8-ampere
(three heater.
Jl&falleled internally).
_ter
u
6i.3-vo1t, 1.6-ampere heater (three heater.
paralleled internally).
y
This type hat an intelP'al protective window.
W'
Tbis type has an internat ma&netic shield.
For basing diagrams, see page 486.
485
RCA Receiving Tube Manual
Basing Diagrams for RCA Picture Tubes
H
8H.
7FA
ANODE"" 03
+ Os + CL
FOCUSING ELECTRODE = 0"
+
ANODE. - 03
Os + CL
FOCUSING ELECTRODE = G.f
H
H
IJK
ANODE,., 0a+ GS+CI.
FOCUSING ELECTRODI .. 0 ..
GI~G4::::Cb•2
:::
ANOOE
7 K
IK.
+
+ CL
= 0"
ANODE = 03
Os
FOCUSING ELECTRODE
...
I
•
H
+
ANO.f - 0.
CL
FOCUSING ELECTRODE <= 0 3
H
..W+
+
ANODE"" 03
Os
Cl
fOCUSING ELECTRODI ... 0 ..
ANODE
ANOO(
H
12A.
ANODE = 03
Os
+
H
+ CL
fOCUSING ELECTRODE = 0"
H
H
12C
ANODE=> G.. + (L
FOCUSING ELECTRODE = 03
H
12.
ANODE = 0 3
+ CL
ANODE
ANOD£
12
m
+
ANODI - 0 3 + Os
C1
'OCUSING ILECfRODI = 0 ..
H
H
12M
+
+-
ANODE .. 0,
Os
C1
'OCUSING 11ICrRODE = G..
H
12N
ANODE = 03
+ Cl
114AU
CA' OYER "N No. I
= 04 + 05
CA., OVII 'IN No.2-ANODE
-= 06 + C1 & HIGH-VOLTAGE
TERMINAL C.... nect HI.....V.1ta,. Supply t. fhl. Cap and .r••
conMct SO.OOO~Dhm,
beI_n thl' Cop and tho Cap
ove, Pin No.1.
fOCUSING ELEClRODE = G3
-"'''to,
14AH
ANODE ... 04+ Os
+ (L+
R
14"L
FOCUSING ELECTRODE = 03
ANODE = 04 + aS + CL
FOCUSING ELECTRODI = G3
486
I ••
ANODI =< 02 + G4 + CL
'OCUSING ELECTRODE'" 03
20A
ANODI = 05 + 0, + CL
FOCUSING ELECTRODE = G3
Electron Tube
Testing
The electron tube user.~service
man, experimenter, or non-technical
radio listener-is interested in knowing
the condition of his tubes, since they
govern the performance of the device,in '
which they are used. In order to determine the condition of a tube, some
method of test is necessary. Because the
operating capabilities and design features of a tube are indicated and described by its electrical characteristics,
a tube is tested by measuring its characteristics and comparing them with values established as standard for that type.
Tubes which read abnormally high with
respect to the standard for the type are
subject to criticism just the same as
tubes which are too low.
Certain practical' limitations are
placed on the accuracy with which a
tube test can be correlated with actual
tube performance. These limitations
make it impractical for the service man
and dealer to employ complex and costly
testing equipment having laboratory accuracy. Because the accuracy of the tubetesting device need be no greater than
the accuracy of the correlation between
test results and receiver performance"
and since certain fundamental characteristics are virtually fixed, by the manufacturing technique of leading tube manufacturers, it is possible to employ a
relatively simple test in order to determine the serviceability of a tube.
In view of these factors, dealers and
service men will find it economically expedient to obtain adequate accuracy and
'simplicity of operation by employing a
device which indicates the status of a
single characteristic. Whether the tube
is satisfactory or unsatisfactory is judged
from the test result of this single characteristic. Consequently, it is very desirable
that the characteristic selected for the
test be one which is truly representative
of the tube's over-all condition.
The following information and circuits are given to describe and illustrate
general theoretical and practical tube-
tester considerations and not to provide
information on the construction of a
home-made tube tester. In addition to
the problem of determining what tube
characteristic is' most ·representative of
performance capabilities in all types of
receivers, the 'designer of a home-made
tester faces the: difficult problem of determining satisfactory limits for his particular tester. Getting information of this
nature, if it is to be accurate and useful,
isa bigjob. It requires the testing of many
tubes of each type, testing of many types,
and correlation of the data with performance in many kinds of equipment.
Short-Circuit Test
The fundamental circuit of ashort-,
circuit tester is shown in Fig. 99. Although this circuit is suitableJor tetrodes
and types having. less than four electrodes, tubes of more electrodes may be
tested by adding more indicator lamps
to the circuit. Voltages are applied between the various electrodes with lamps
in series with the electrode leads. The
value of the voltages applied will depend
Fig. 99
on the type of tube being tested and its
maximum ratings. Any two shorted electrodes complete a circuit and light one
or more lamps. Since two electrodes may
be just touching to give a high-resistance
short, it is desirable that the indicating
lamps operate on very low current. It is
also desirable to maintain the filament
487
====== RCA Receiving Tube Manual ==;;;;;;;;;;:;;===
or heater of the tube at its operating stant temperature, a low positive volttemperaturedul'ingtheshort-circuittest, age is applied to the plate and the elecbecause short-circuits in a tube may . tron emission is read on the meter. Readsometimes occur only when the elec- ings which are well below the average for
trodes are heated. However, a short- a particular tube type indicate that the
circuit tester having too high a sensi- total number of available electrons has
tivity may indicate very-high-resistance been so .reduced that the tube is no
shorts that do not adversely affect tube longer able to function properly.
operation.
Selection of a Suitable
Characteristic for Test
Some characteristics of a tube are far
more important in determining its operating worth than are others. The cost of
building a device to measure anyone of
the more important characteristics may
be considerably higher than that of a
device which measures a.less representative characteristic. Consequently, three
methods of test will be discussed, ranging from relatively simple and inexpensive equipment to more elaborate, more
accurate, and more costly devices.
An emission test is perhaps the
simplest method of indicating a tube's
condition. (Refer to Diodes, in ELECTRONS, ELECTRODES, AND ELEC. TRON TUBES SECTION, for a discussion of electron emission.) Since emission
falls off as the tube wears out, low emission is indicative of the end of tube
serviceability. However, the emission
test is subject to limitations because it
tests the tube under static conditions
and does not take into account the actual operation of the tube. On the one
hand, coated filaments, or cathodes,
often develop active spots from which
the emission is so great that the relatively small grid area adjacent to these
spots cannot control the electron stream.
Under these conditions, the total emission may indicate the tube to be normal
although the tube is unsatisfactory. On
the other hand, coated types of filaments
are. capable of such large emission that
the tube will often operate satisfactorily
after the emission has fallen far below
the original value.
Fig. 100 shows the fundamental circuit diagram for an emission test. All of
the electrodes of the tube, except the
cathode, are connected to the plate. The
filament, or heater, is operated at rated
voltage; after the tube has reached con488
Fig. 100
A transconductance test takes
into account a fundamental operating
principle of the tube. (This fact will be
seen from the definition of transconductance in the Section on ELECTRON
TUBE CHARACTERISTICS.) It follows that transconductance tests, when
properly made, permit better correlation
between test results and actual performance than does a straight emission test.
There are two forms of transconductance test which can be utilized in a
tube tester. In the first form (illustrated
by,Fig. 100 giving a fundamental circuit
with a tetrode under test),appropriate
operating voltages are applied to the
Fig. 101
electrodes of the tube. A plate current
depending upon the electrode voltages
will then be indicated by the meter. If
the bias on the grid is then shifted by
the application of a different grid voltage, a new plate-current reading is obtained. The difference between the two
plate-current readings is indicative of
the transconductance of the tube. This
Electron Tube Testing
method of transconductance testing is
commonly called the "grid-shift" method, and depends on readings under static
conditions. The fact that this form of
test is made under static conditions imposes limitations not encountered in the
second form of test made under dynamic
conditions.
The dynamic transconductance test
illustrated in Fig. 102 gives a fundamental
circuit with a tetrode under test. This
method is superior to the static transconductance test in that ac voltage is
applied to the grid. Thus, the tube is
tested under conditions which approximate actual operating conditions. The
alternating component of the plate current is read by means of an ac ammeter
of the dynamometer type. The transconductance of the tube is equal to the
Fig. 102
ac plate current divided by the inputsignal voltage. If a one-volt rms signal
is applied to the grid, the plate-currentmeter reading in milliamperes multiplied by one thousand is the value of
transconductance in micromhos.
The power-output test probably
gives the best correlation between test
results and actual operating performance
of a tube. In the case of voltage amplifiers, the power output is indicative of
the amplification. and output voltages
obtainable from the tube. In the case of
power-output tubes, the performance of
the tube is closely checked. Consequently, although more complicated to
set up, the power-output test will give
closer correlation with actual performance than any other single test.
Fig. 103 shows the fundamental circuit of a power-output test for class A
operation of tubes. The diagram illustrates the method for a pentode. The ac
output voltage devElop€d across the
plate-load impedance (L) is indicated by
the current meter. The current meter is
isolated as far as the dc plate current is
concerned by the capacitor (C). The
power output can be calculated from the
Fig. 103
current reading and known load resistance. In this way, it is possible to determine the operating condition of the tube
quite accurately.
Fig. 104 shows the fundamental circuit of a power-output test for class B
operation of tubes. With ac voltage applied to the grid of the tube, the current
in the plate circuit is read on a dc milliammeter. The power output of the tube
is approximately equal to:
(Ib' x RL)/OA05,
where Po is the power output in watts,
h is the dc current in amperes, and RL
is the load resistance in ohms.
Fig. 104
Essential Tube-Tester Requirements
1. The tester should provide for
making a short-circuit test before measurement of the tube's .characteristics.
2. It is important that some means
of controlling the voltages applied to the
electrodes of the tube be provided. If the
tester is ac operated, a line-voltage con-
489
RCA Receiving Tube Manual
trol permits the supply of proper electrode voltages ..
3. It is essential that the ·rated volt"
age'applied to the filament or heater be
maintained accurately.
4. It is suggested that the characteristics test follow one of the methods described. The method selected and the·
quality of the parts used in the test will
depend upon the user's requirements.
Tube-Tester.Lim-itations
A tube-testing device can only indicatethe difference between a given tube's
490
characteristics and those which are standard for that. particular type. Since the
operating conditions imposed' upon. a
t.ube of a given type may vary within
wide limits, it is impossible for a tubetesting device to 1lvaluate tubes in terms
of performance capabilities for 'all tlppli-{
cations. The tube tester, therefore, cannot be looked upon as a final authority
in determining whether or not a tube is
always satisfactory. Actual operating
test in the equipment in which the tube
is to be used will give the best possible
indication of a tube's worth.
Resistance-Coupled
Amplifiers
Resistance-coupled, audio-frequency
voltage amplifiers utilize simple components and are capable of providing essentially uniform amplification over a relatively wide frequency range.
Suitable Tubes
In this section, data are given for
over 50 types of tubes suitable for use
in resistance-coupled circuits. These types
include low- and high-mu triodes, twin
triodes, triode-connected pentodes, and
pentodes. The accompanying key to tube
types will assist in locating the appropriate data chart.
Circuit Advantages
For most of the types shown, the data
pertain to operation with cathode bias;
for all of the pent odes, the data pertain to
operation with series screen-grid resistor.
The use of a cathode-bias resistor where
feasible and a series screen-grid resistor
where applicable offers several advantages
over fixed-voltage operation.
The advantages are: (1) effects of
possible tube differences are minimized;
(2) operation over a wide range of platesupply voltages without appreciable
change in gain is feasible; (3) the low
frequency at which the amplifier cuts off
is easily changed; and (4) tendency toward motorboating is minimized.
Number of Stages
These advantages can be enhanced
by the addition of suitable decoupling
filters in the plate supply of each stage
of a multi-stage amplifier. With proper
filters, three or more amplifier stages can
be operated from a single power-supply
unit of conventional design without encountering any difficulties due to coupling
Type
Chari Na.
3AU6
3AV6
3BC5
3CB6
3CF6
2
9
11
10
11
Type
CharlNa.
6CG7
6CN7
6EU7
6FQ7
6J5
8
5
9
8
8
5
8
5
3
8
4AU6
4BC5
4BQ7A
4BZ7
4CB6
10
10
11
6SL7GT
6SN7GTB
6T8A
7AU7
8CG7
5BK7A
5BQ7A
5T8
6AB4
6AG5
10
10
5
4
11
12AT6
12AT7
12AU6
12AU7A
12AV6
5
4
2
3
9
6AT6
6AU6A
6AV6
6BC5
6BK7B
5
2
9
11
10
12AX7
12AX7A
12AY7
12SL7GT
12SN7GTA
9
9
1
5
8
6BQ7A
6BZ7
6C4
6CB6
6CB6A
6CF6
10
10
3
11
11
11
20EZ7
5879P
5879T
7025
7199P
7199T
2
11
9
6
7
9
12
13
T=Triode Unit or Triode Connection
p= Pentode Unit or Pentode Connection
KEY TO CHARTS
491
RCA Receiving Tube Manual
through the power unit. When decoupling
filters are not used, not more than two
stages should be operated from a single
power-supply unit.
Symbols Used in ResistanceCoupled Amplifier Charts
C = Blocking Capacitor (I'f).
Ck = Cathode Bypass Capacitor (I'f).
Cg 2 = Screen-Grid Bypass Capacitor
(pf).
Ebb = Plate-Supply Voltage (volts).
Voltage at plate equals platesupply voltage minus drop in R"
and Rk.
Rk = Cathode Resistor (ohms).
Rg. = Screen-Grid Resistor (megohms).
Rg = Grid Resistor (megohms)
for following stage.
R" = Plate Resistor (megohms).
V.G.= Voltage Gain.
Eo = Output Voltage (peak volts).
This voltage is obtained across
Rg (for following stage) at any
frequency within the flat region
of the output vs. frequency curve,
and is for the condition where the
signal level is adequate to swing
the grid of the resistance-coupled
amplifier tube to the point where·
its grid starts to draw current.
Note: The listed values for Eo are the peak output voltages available when the grid is driven
from a low-impedance source. The listed values
for the cathode resistors are optimum for any
signal source. With a high-impedance source, protection against severe distortion and los. of gain
due to input loading may be obtained by the use
of a coupling capacitor connected directly to the
input grid and a high-value resistor connected
between the grid and ground.
General Circuit Considerations
In the discussions which follow, the
frequency (f.) is that value at which the
high-frequency response begins to fall
..
!:i
51
I
EO
~ ~~f~I----~4~20~~~-------f~a--FA£QUENCV-
492
off. The frequency (fl) is that value at
which the low-frequency response drops
below a satisfactory value, as discussed
below. A variation oflO per cent in values
of resistors and capacitors has only slight
effect on performance. One-half-watt resistors are usually suitable for Rg2, Rg ,
R p , and Rk resistors. Capacitors C and
Cg• should have a working voltage equal
to or greater than Ebb. Capacitor Ck
may have a low working voltage in the
order of 10 to 25 volts.
Triode Amplifier
Heater-Cathode Type
Capacitors C and Ck have been
chosen to give an output voltage equal
to 0.8 Eo for a frequency (fl) of 100
cycles. For any other value of fl, multiply values of C and Ck by 100/fl. In the
Diagram No.1
case of capacitor Ck , the values shown
in the charts are for an amplifier with dc
heater excitation; when ac is used, depending on the character of the associated circuit, the gain, and the value
of fl, it may be necessary to increase the
value of Ck to minimize hum disturbances. It may be desirable to operate the
heater at a positive voltage of from 15
to 40 volts with respect to the cathode.
The voltage output at fl of "n" like
stages equals (0.8)n X Eo, where Eo is
the peak output voltage of final stage.
For an amplifier of typical construction,
the value of f. is well above the audiofrequency range for any value of R".
Pentode Amplifier
Filament-Type
Capacitors C and Cg • have been
chosen to give an output voltage equal
to 0.8 X Eo for a frequency (fl) of 100
Resistance-Coupled Amplifiers
100 cycles. For any. other value of f.,
multiply values of C, Ck , and Cg • by
100/flo In the case of capacitor Ck , the
values shown in the charts are for an
amplifier with dc heater excitation; when
cycles. For any other value of f1, multiply values of C and Cg • by 100/f,. The
voltage output at f 1 for un" like stages
equals (0.8)n X Eo where Eo is peak output voltage of final stage. For an amplifier of typical construction, and for Rp
values of 0.1, 0.25, and 0.5 megohm, approximate values of f. are 20000, 10000,
and 5000 cps, respectively. Note: The
C
Eo
Rp
c
1
-=-
Ebb
j
-=-
Diagram No.3
ac is used, depending on the character
of the associated circuits, the voltage
gain, and the value of f1, it may be necessary to increase the value of Ck to minimize hum disturbances. It may be desirable to operate the heater at a positive
voltage of from 15 to 40 volts with respect to the cathode. The voltage output at f. for un" like stages equals (0.7)n
X Eo where Eo is peak output voltage
of final stage. For an amplifier of typical
construction, and for Rp values of 0.1,
0.25, and 0.5 megohm, approximate values of f. are 20000, 10000, and 5000 cps,
respectively.
Ebb
Diagram No.2
values of input-coupling capacitor in
microfarads and of grid resistor in megohms should be such that their product
lies between 0.02 and 0.1. Values commonlyused are 0.005).1f and 10 megohms.
Pentode Amplifier
Heater-Cathode Type
Capacitors C, Ck , and Cg 2 have
been chosen to give an output voltage
equal to 0.7 X Eo for a frequency (f.) of
(See page 492 for explanation of column headings)
I Ebb I
Rp
I
Rg
90
0.1
0.24
0.51
0.24
0.51
1.0
180
0.1
0.24
0.51
0.24
0.51
1.0
300
0.1
0.24
0.51
0.24
0.51
1.0
I R g2 I
-
---
Rk
1800
3700
7800
1300
2800
5700
1200
2300
4800
I
C g2
---
--
I Ck I
-.
-
---
C
---
--
I Eo* I
v.G·1
14
16
24
26
27
31
33
33
27
29
30
58
30
S6
28
30
31
13
12AY7See Circuit
Diagram 2
*
• One triode unit.
Peak volts •
• Coupling capacitors should be selected to give desired frequency response. Cathode
resistors should be adequately bypassed.
493
RCA Receiving Tube Manual
(See page 492 Jor explanation oj column headings)
Ebbl
®
3AU6
4AU6
6AU6A
12AU6
90
0.22
0.47
1.0
0.340
0.370
0.380
2700
2900
3100
0.057
0.050
0.050
5.8
5.4
5.3
0.0081
0.0055
0.0034
16
22
25
79
104
125
0.47
0.47
1.0
2.2
1.00
1.00
1.00
6000
6200
6300
0.027
0.023
0.027
2.8
2.7
2.8
0.0042
0.0027
0.0019
13
17
25
105
137
161
1.0
2.2
1.90
2.40
10800
13100
0.017
0.017
1.7
1.7
0.0025
0.0017
10
19
139
184
0.22
0.22
0.47
1.0
0.520
0.520
0.520
1340
1390
1420
0.059
0.059
0.059
8.8
8.7
8.6
0.0081
0.0053
0.0032
31
43
48
143
192
223
0.47
0.47
1.0
2.2
1.05
1.15
1.20
2700
2880
2960
0.039
0.037
0.036
5.5
5.4
5.4
0.0041
0.0027
0.0019
34
43
50
189
249
294
1.0
2.2
2.40
2.70
5500
6000
0.028
0.022
3.2
2.8
0.0023
0.0015
33
40
230
323
0.22
0.22
0.47
1.0
0.530
0.540
0.540
780
783
800
0.077
0.077
0.077
13.2
13.2
13.1
0.0082
0.0053
0.0033
53
65
74
200
270
316
0.47
0.47
1.0
2.2
1.15
1.22
1.31
1590
1650
1720
0.057
0.049
0.045
8.4
7.4
7.2
0.0045
0.0027
0.0017
56
72
82
275
357
418
1.0
2.2
2.50
2.80
3300
3500
0.036
0.031
5.3
4.2
0.0022
0.0015
57
72
352
466
1600
18QO
2000
-
3.2
2.5
2.0
0.061
0.033
0.015
9
11
14
10
11
11
1.6
1.1
1.0
0.032
0.015
0.007
10
IS
18
11
11
11
-
0.7
0.5
0.43
0.015
0.0065
0.0035
14
20
24
11
11
11
--
3.9
2.9
2.5
0.062
0.037
0.016
20
26
29
11
12
12
1.9
1.4
1.1
0.032
0.016
0.007
24
33
40
12
12
12
0.8
0.56
0.48
0.015
0.007
0.0035
31
44
54
12
12
12
4.1
3.0
2.4
0.065
0.034
0.016
38
52
68
12
12
12
1.9
1.3
1.1
0.032
0.016
0.007
44
68
80
12
12
12
0.9
0.52
0.46
0.015
0.007
0.0035
57
82
92
12
12
12
1.0
1.0
90
6C4
7AU712AU7A-
0.047
0.047
0.1
0.22
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.0
0.047
0.047
0.1
0.22
0.1
0.22
0.1
180
0.47
See Circuit
Diagram 1
300
I Eo* I v.G·1
0.22
See Circuit
Diagram 3
300
I Cg2I Ck I
Rg
1.0
180
I R g21
Rp
0.22
0.22
0.47
1.0
0.047
0.047
0.1
0.22
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.0
• One triode unit.
--
-
-
-
Rk
3000
3800
4500
6800
9500
11500
920
1200
1400
2000
2800
3600
5300
8300
10000
870
1200
1500
1900
3000
4000
5300
8800
11000
*Peak volts.
-
-
--
C
======. Resistance-Coupled Amplifiers
.(See page 49ft for explanation of column heading.)
. 90
.180
·0.1
0.22
0.47
0.22
.0.22
0.47
1.0
0.47
0.47
1.0
2.2
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.0
0.47
0.47
1.0
2.2
..--
0.1
' 0.22
0.47
.--
0.1
300
90
-
0.1
0.22
0.22·
0.47
1.0
0.47
0.47
1.0·
2.2
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.0
.180
0.22
. 0.47
0.47
t.O
0.1
0.1
0.22
0:47
.0.22
0.22
0.47
0.1
.0.47
0.47
1.0
2.2
2.2
,300
,e One triode unit.
1407
16·74
1786
--
2890
3860
4660
6960
8450
9600
974
,1404
2169
-
2510
4200
4950
-- .
--
5700
8720
9700 '
.--
0.1
0.22
0.47'
'0.22
0.47
1.0
10900
12500
13500
-
:U
'0.1
5500
6300
6930
--
0.47
1.0
0.47
2680
3060 '
3390
4200
4600
4800
----
.7000
7800
8100
12000
14000
15000
1900
2200
'2500
--
3400
4100
' 4600
_.i
--
-
~-
-
--
-
--
6600
8100
91-00
,
1500
1800' .
2100
2600
3200
3700
5200
6300
7200
* Peak volts.
--
--
-- .
-
·2.4
.2.00
1.84
0.026
0.014
0.0074
8
11
13
24
25
28
.1.33
1.01,
0.92
0.0136
0.0067
0.0038
10
14
15
25
28
28
0.63
0.52
0.47
0.007
0.0043
0.0031
13
14
18
26
28.
28
-
3.6
3.0
2.6
0.029
'0;016
0.0083
20
28
31
31
33
34
--
1.75
1.34
. 1.14
0.0140
. 0.0077
0.0047
24
35
42
33
33
33
0:83
0.67
0.55'
0.0075
0.0046
0.0032
31
39
45
31
32
32
4.0
3.1
2.5
0.028
0.015
0.0083
37
57
78
34
.34
33
1.9
1.3
1.1
0.015
0.0074
0.00'46
50
,78
85
33
33
32
57
81
88
33
32
32
-
--
----.
--
-
----
-
--
---
0.90
0.0076
'0.62 .0;0041
'0.57 . ,0,0030 '
.2.5
2.2
·2.0
0.025 .
0.014
0.11065
5.4
7.5
9.1
,22
27
30,
1.5
' 1.3
1.1
0.013
0.007
0,0035
7.3"
10
12
30
34
31
0.83
. 0.7
0.6
0.006
'0.0035
0.002
10
14
16
36
39
41
3.6·
'3.1
2:8
o.on
0.014 .
0.0065
19
.25
.U
30
35
37
2.2
1.7
1.5
0.014
0.0065
0.0035
24
34
38
38
42
44
1.1
0.9
0.8
0.0065
0.0035
0.002
29·
38
43
44
46
47
4.4
3:6
3.0
0.027
0.014
0.0065
40
·54
63
34
38
41
2.5
1.9
1.6
0.013
0.0065
·0.0035
51
65
17
42
46
48
1.2
1.0
0.9
0.006
0.0035
0.002
61
74
85
48
6AB4
12AT7·
See Circuit
Diagram 1
ST8
,'6AT6
6CN7
, 6SL7GTe
6T8A
12AT6
.T2SL7GTe
See Circuit
'Diagram 1
SO
51
495
RCA Receiving Tube Manual
(See page 49l! for explanation of column headings)
C
90
5879
See Circuit
Diagram 3
180
3.0.0
o
9.0
See Circuit
Diagram 1
18.0
3.06
.0.1
0.22
0.47
0.35
1700
.0.044
0.046
0.047
4.6
4.5
4.4
0.020
0.012
0.006
13
17
20
29
39
47
0.22
0.22
0.47
1.0
0.80
3000
0.034·
0.035
0.036
3.2
3.1
3.0
0.010
0.0.05
0 ..0.03
15
21
24
43
59
67
.0.47
0.47
1.0
2.2
1.9
1.0.0.0
.0.621
.0 ..022
.0.023
1.8
1.7
1.1
.0 ..005
0.003
0.002
21
25
28
59
75
87
.0.1
0.1
0.22
0.47
0.35
700
0.060
0.062
0.064
7.4
7.3
7.2
0.020
0.012
0.006
24
28
33
39
56
65
0.22
0.22
0.47
1.0
0.80
1200
0.045
0.046
0.048
5.5
5.3
5.2
0.010
0.005
0.003
24
31
34
'65
87
101
.0.47
0.41
1.0
2.2
1.9
2500
0.033
0.634
.0.035
3.5
3.4
3.3
0.005
0.003
0.0.02
27
32
37
98
122
14.0
0.1
0.1
.0.22
0.41
.0.35
3.0.0
.0 •.075
0 ..071
.0 •.080
1.0.8
1.0.6
1.0.5
.0 •.02.0
.0 . .012
.0 •.0.06
25
32
35
51
68
83
0.22
0.22
.0.47
1•.0
.0.8.0
6.0.0
0 •.056
0.051
.0 ..058
7.9
1.5
7.4
.0 ..01.0
.0.0.05
.0 ..0.03
28
31
41
81
1.011
123
.0.47
0.47
1..0
2.2
1.3
12.00
.0 •.044
.0.046
.0.047
5.3
5.2
5.1
.0 •.0.05
.0 •.0.03
0.002
34
42
48
125
152
174
0.041
0.041
0;1
.0.22
2.9
2.4
2.3
0.060
.0 ..033
.0 •.016
9
12
14
10
11
21
.0.1
.0.1
.0.22
0.47
1.8
1.3
1.0
.0 •.027
.0.015
0.001
10
13
16
12
13
13
.0.22
0.22
.0.41
1..0.0
.0.81
0.53
.0.49
0.015
.0 •.0.06
.0 ..003
12
16
19
13
13
!4
.0 ..041
0 ..041
.0.1
.0.22
3.5
2.6
2.4
.0 •.063
.0 •.033
.0 . .016
21
29
35
12
13
\3
.0.1
.0.1
.0.22
.0.41
1.9
1.35
1.1
.0 ..031
.0 •.015
.0 •.0.01
26
33
4.0
13
14
14
.0.22
.0.41
1.00
0.92
0.61
0.52
.oms
.0.22
.0.006
0 ..0.03
28
39
47
14
14
J4
.0 . .041
.0.041
.0.1
.0.22
3.9
2.8
2.5
.0 •.063
.0.033
.0 •.016
42
65
11
13
13
14
.0.1
.0.22
* Peak volts.
496
\ V.G.\
0.1
As Triode:
5879
IEo*
.0.1
0.22
0.41
0.22
.0.47
1..00
-
-
1800
2100
22.00
32.00
390.0
4300
62.0.0
810.0
90.0.0
12.0.0
16.0.0
18.0.0
22.0.0
29.0.0
34.00
45.00
64.0.0
82.00
11.0.0
15.0.0
110.0
--
2.0.00
340.0
37.0.0
4300
-
2.1
1.4
1.1
0.91
0.032
.0 •.015
0 •.007
.0.015
45
74
83
50
15
15
720.0
1400
-
0.63
0.63
.0.0.07
88
94
15
15
-
.0 •.0.03
IS
15
!
Resistance-Coupled Amplifiers
(See page 49:! for explanation of column headings)
\ Ebb \
90
180
300
90
180
300
Rk \ C g2\ Ck \
Rp \ Rg \ R g2\
-
0.047
0.047
0.1
0.22
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.00
0.047
0.047
0.1
0.22
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.00
-
0.047
0.047
0.1
0.22
-
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.00
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.0
-
-
--
-
-
-
0.1
0.22
0.22
0.47
1.0
0.47
0.47
1.0
2.2
0.1
0.1
0.22
0.47
0.22
0.22
0.47
1.0
0.47
0.47
1.0
2.2
---
-
v.G·1
-
3.1
2.5
2.1
0.063
0.031
0.016
14
18
20
13
14
14
-
1.8
1.3
1.1
0.034
0.015
0.006
15
20
23
14
14
15
0.80
0.65
0.60
0.013
0.007
0.004
16
22
25
14
14
15
-
-
-
3.6
2.9
2.2
0.066
0.055
0.015
33
41
47
14
14
15
2750
3550
4140
-
-
1.8
1.4
1.3
0.028
0.015
0.007
35
45
51
15
15
16
5150
7000
7800
-
1.0
0.71
0.61
0.016
0.007
0.004
36
45
51
16
16
16
3.6
3.0
2.5
0.061
0.032
0.015
59
73
83
14
15
16
1.9
1.4
1.2
0.031
0.014
0.0065
68
82
96
16
16
16
0.95
0.69
0.58
0.015
0.0065
0.0035
68
85
96
16
16
16
2.7
2.4
2.3
0.023 0.013
0.007
5
6
8
29
35
41
---
1.6
1.4
1.3
0.012
0.006
0.003
6
9
39
45
48
0.9
0.8
0.7
0.006
0.003
0.002
'9
13
48
52
55
4.0
3.5
3.1
0.025
0.013
0.006
18
25
32
40
47
52
--
2.4
2.1
1.8
0.012
0.006
0.003
24
34
39
53
59
63
1.3
1.1
1.0
0.006
0.003
0.002
30
39
45
62
66
68
4.6
4.0
3.6
0.027
0.013
0.006
43
57
66
45
52
57
3.0
2.3
2.1
0.013
0.006
0.003
54
69
79
59
65
68
1.6
1.3
1.1
0.006
0.003
0.002
62
77
92
69
73
75
1300
1580
1800
-
-----
-
I E o *\
1500
1860
2160
4800
6500
7800
---
0.1
0.22
0.47
7000
9100
10500
-
0.47
3370
4100
4800
2500
3130
3900
-
0.47
1.0
2.2
- One triode unit.
-
1870
2230
2500
C
4400
4700
4800
7000
7400
7600
12000
13000.
14000
1800
2000
2200
3000
3500
3900
5800
6700
7400
1300
1500
1700
2200
2800
3100
4300
5200
5900
-
--
-
-
,---
-
---
--
-
--
11
11
6CG7'
6FQ7
6J5
6SN7GTB8CG7
12SN7GTA'
See Circuit
Diagram 1
3AV6
6AV6
6EU7'
12AV6
12AX7'
12AX7A •
20EZ7'
7025See Circuit
Diagram 1
* Peak volts.
497
;;;;;;;;;;===== RCA Receiving Tube, Manual,;;;;;;;;;;=====
,(See page 49l! for explanation of column headings)
90
4BQ7A4BZ75BK7/i.., 5BQ7A6BK7B6BQ7A. 6BZ7-
0.047
0.047
0.10
0.22
---
1580
1760
1820
0.1
0.1
0.22
0.47
-
2920
,3570
4020
0.22
0.22
0.47
1.0'
,-,
0.0'47
0;0'47
0'.1
0'.22
-
694
. 817
90S '
'0'.10'
0.1
0'.22
0'.47
--
1596
1630'
1860'
0.22
0'.22
.0.47
1.0
---
3950
4SDD
5530'
180'
300
90
12
17 '
20
--
0.98
0.78
0'.63
0.0135
0.0075
0.0'0'36
16
,21
25
19,
20
20
6.0 '
4.4
4.0'
0.0'62
0.0'32
0.0'155
25
32
35
23
24
25
2.80' ' 0.030
0'.0'152
2.30'
2;00'
0'.0073
3D
'32
38
23
24
24
1.24
0.96
0.79
0.0150'
0.0072
0,00'38
35 •
. 41
49
22
23
23
6.70
' 5.50'
4.30
0.0'62
0.032
0.016
38
48
57
26
27
27
0.031 .
0'.015
0'.0'074
42
56
64
25 '
26
' 25
' 50' .
70'
84
24
24
24
-
-
-
-
--
,
19
20
20
-
1009
1332
1689
--
3.5 ,"
"2.5
2.1
0'.22,
0.47
1.0'
-
0'.22
2623
390'0'
4920'
-
0'.0'15
1.5
,0'.0'0'73
'.1.10':.88 ' 0.00'39
0'.22
0'.22 ' 0'.480 380'0'
0.47 ., 0'.480 ,380'0'
0.50'0' 4400'
1.0'
0'.0'46
0'.0'49,
0'.0'45
5.5
5.5
5.3
0.00'84
0'.0'054
0'.0'0'34
10'
16
23
89
114
128
0'.47
0.47
1.0'
2.2
1.0'4
1.0'4
1.10
7200'
770'0'
840'0
0,033
0'.0'33
0'.0'31
2.9
2.8
2.6
0.0044
0'.0'0'29
0'.0'0'20'
10'
' IS
18
111
133
152
1.0'
2.2
2;50
2.50'
16000
1860'0'
0'.018
0';0'16
1.4
1.2
0.00'23
'0.0'0'17
10
11
118
139
0'.5,50 _160'0'
0.620' 1800'
0'.650' 190'0'·
'0'.0'72
0.0'62
0.0'62
9.5'
8.5
8.5
'0.00'90'
0.0053
' 0'.0'034
,30
36
·43
161
208
239
""j, },0.47 ' 1;0'0, ·3400'
. 0'.'00'48
0.0'031 '
0'.0'0'20
34
41
46
183
229
262
' 0'.10'
0.47
1.0
. 0'.22
0'.47'
1:0'
-
-
-
1.0'
2.2
1.0'0' 3500'
1.00' ' ·380'0'
0.0'59
,0'.0'59
0.0'59
6.0'
6.0'
.5.8
1.0'
2.2
2.60 '
2.60
730'0'
7400'
0.029
0.0'29
2.7
2.1
0'.00'22
. 0.00'16
33
38
. 227
281
0.22
0'.22
0.47
1.0
' 0'.600
6.680
0.700
980
1090
1150
0.085
0.084
0.081
13.0
12.0
11.0
' 0.0085
0.0055
0.0033
51
64
' 74
223
288
334
'0.47
0.47
'1.0 '
2.2
1.25
1.34
1.53
2000'
2150
2350
' 0.064,
0.061
0.057
7.9
7.6
7.1
0.00'45
0.0029
0.00'19
52
67
79
285
363
416
,1.0
2.2
2.60'
3.00
4060
4700'
··,0.044,.
'0.038
5.2
4.3
0i0023
0.0015
'51
69
334
427
1.0
_ One triode unit.
498
-
,0.029
0.015
,0;0075
0.10
'0'.22
·.0,47
"6CF6
See'€ircuit
'Diagram 3
16
2.1
1.7
1.4
13
438
542,
644
,~6AG5
30'0
, 18
19
20
0.058
0.032'
,0.015
-
0'.22
6BC5
6CB6
,·6CB6A
-
9'
4.0
3.5
3.0
--
1.0'
180
~
,
0.047
, 0.047 ' 0.1
0.22
"
3BC5
3CB6
3CF6
4BC5
4CB6
6040
,7500
8800
"
See Circuit
Diagram 1
®
--
---
'" Peak volt••
Resistance-Coupled Amplifiers
(See page 49!e for explanation of column headings)
c
90
0.22
0.560
0.600
0.640
3700
3900
4200
0.046
0.043
0.039
4.50
4.30
4.00
0.0090
0.0055
0.0033
12
17
19
73
95
109
0.47
0.47
1.0
2.2
0.870
0.980
1.00
6000
6700
6700
0.036
0.044
1>.043
2.70
3.00
2.80
0.0046
0.0030
0.0020
16
22
25
95
113
131
1.0
2.2
2.00
2.20
12200
12800
0.021
0.024
1.44
1.74
0.0028
0.0016
15
21
119
167
0.22
0.22
0.47
1.0
0.530
0.600
0.650
1570
1730
1820
0.069
0.064
0.061
7.50
7.40
7.30
0.0088
0.0064
0.0034
32
38
45
82
164
190
0.47
0.47
1.0
2.2
1.12
1.40
1.57
3200
3500
3740
0.053
0.042
0.040
5.30
5.10
5.40
0.0046
0.0028
0.0019
35
40
45
147
209
250
1.0
2.2
2.50
3.40
6500
7500
0.039
0.026
2.80
2.30
0.0024
0.0015
34
39
179
277
0.22
0.22
0.47
1.0
0.600
0.670
0.720
9200
1010
1100
0.086
0.076
0.076
11.2
10.5
10.0
0.0085
0.0052
0.0033
52
66
77
182
236
257
0.47
0.47
1.0
2.2
1.25
1.43
1.45
1950
3210
2200
0.060
0.053
0.055
7.0
6.4
6.3
0.0044
0.0027
0.0019
41
72
82
221
296
345
1.0
2.2
3.00
3.30
'4100
4340
0.040
0.037
4.2
3.6
0.0022
0.0016
57
74
295
378
3.3
2.8
2.4
0.060
0.032
0.016
8
10
11
12
1.60
1.24
1.10
0.029
0.015
0.008
9
12
14
13
13
14
0.70
0.51
0.44
0,015
0.0077
0.0045
12
16
18
12
12
12
4.0
3.5
2.9
0.061
0.032
0.016
16
20
24
14
14
15
2.0
1.6
1.2
0.031
0.016
0.0082
17
24
30
14
14
13
0.79
0.57
0.47
0,015
0.0078
0.0046
24
33
41
13
12
12
4.0
3.6
3.0
0.061
0.031
0.015
27
38
44
15
15
15
2.3
1.7
1.31
0.031
0.0155
0.0078
26
41
51
15
14
14
0.93
0.69
0.56
0,015
0.0079
0.0045
36
51
55
13
13
13
1.0
180
1.0
300
1.0
90
180
300
IEo* IV.G·I
0.22
0.47
1.0
0.047
0.047
0.1
0.22
0.10
0.1
0.22
0.47
0.22
0.22
0.47
1.0
0.047
0.047
0.1
0.22
0.10
0.1
0.22
0.47
0.22
0.22
0.47
1.0
0.047
0.047
0.1
0.22
0.10
0.1
0.22
0.47
0.22
1.0
0.22
0.47
-
--
--
--
--
1292
1401
1470
2630
3090
3440
6550
8270
9130
723
836
948
1543
2002
2522
4390
6122
8060
534
726
840
1117
1613
2043
3133
4480
4930
------
--
-
--
13
13
@
7199
Pentode
Unit
See Circuit
Diagram 3
@
7199
Triode Unit
See Circuit
Diagram 1
• Peak volts.
499
Outlines
II
II
(All dimensions are in inches)
METAL TYPES
1 I
.400
MAX.
CERAMIC
TWELVAR
BASE
~---rt
.~~~_
1
MAX.
I
.-i
---~~
.800
MAX.
~o 1
1.4351~
---o-j MAX.
I-
-1-
II~MAXI
+1
:l:2_~llT _IJ'~" II ~~.I
it L"" f.~,,, rL
Lt
J\f
-
lfa MAX.
-J
_I
j~MAX'1
=i2
\SMALLWAFER
OCTAL
"'u
I1
'r.L~ :'U~'l __
MTIOA
or
I~ MAX.
MAX.
rr
I:!.
L[ J\SM:~L-
I~
WAFER
OCTAL
~
I~:I:~
-4-
-5-
-6-
GLASS TYPES
~~MA~~
G8
!-1l
]J JjX.
X
52
y
L MINIATURE
SMALL-BUTTON
7-PIN
-7Oullin. X
Y
Z
7A 1-3/4 1-1/2 1-1/8 = 3/32
7B 2-1/8 1-7/8 1-1/2 = 3/32
7C 2-5/8 2-3/8
2 = 3/32
500
=i~M:t
[811
L MINIATURE
SMALL-BUTTON
9-PIN
-8Outline X
Y
Z
8A 1-3/4
1-1/2
1-1/8 =3/32
8B 2-3/16 1-15/16 1-9/16 = 3/32
8C 2-13/32 2-5/32 1-25/32 = 3/32
2-3/8
80 2-5/8
2=3/32
8E 3-1/16 2-18/16 2-7/16 = 3/32
SMALL-BUTTON
MINIATURE 9-PIN
-9Outlin. X
Y
9A 2-27/82 2-7/16=1/8
9B 3-9/32 2-7/8=1/8
9C 3-1/2 3-1/4 mao;.
Outlines
==========-
rr'~ll ~~"~F
11
"IJI ,:I.- L".,'_'"",.
"JJ~j'
l
.0<
,
~
-10-
Outline X
lOA 3.000
lOB 3.080
10C 3.110
10D 3.410
NEONOVAL 9-PIN
\SMALL-BUTTON
NOVAR 9-PIN
Y
2.620
2.700
2.730
3;030
Z
2.100-2.280
2.050-2.230
2.210-2.390
2.510-2.690
SMALL-BUTTON
DUODECAR 12-PIN
_11_
-12-
Outline X
Y
Z
llA 2.630 2.320 1.770-2.010
11B 2.930 2.620 2.070-2.310
llC 3.230 2.920 2.370-2.610
Outline
12A
12B
12C
12D
X
1.875
2.375
2.625
2.875
Y
1.250-1.500
1. 750-2.000
2.000-2.250
2.250-2.500
ll~ MAX~~
,,11
I---~J M~X.
J 0J;J,
I~
MAX.
~
TYPE
-13-
Y
Outline
X
13A 2-25/32 2-1/4
l3B 3-5/32 2-5/8
-14-
Outline X
14A 2-7/8
14B 3
14C 3-5/16
14D 3-3/8
14E 3-7/16
14F 3-13/16
Y
2-5/16
2-7/16
2-3/4
2-13/16
2-7/8
3-1/4
-15-
Z
1-9/32
1-9/32
1-5/16
1-9/32
1-9/32
1-9/32
Outline
15A
lOB
15C
15D
X
3-5/16
3-9/16
3-7/8
4-1/16
Y
2-3/4
3
3-5/16
3-1/2
Z
1-5/16
1-9/32
1-9/32
1-9/32
501
RCA Receiving Tube Manual
['""l~~~' r~'~' ~
11.:,
l
11
noo"ill U'" ill
3.375
3.625
3.625
4.125
Y
2.750-3.000
3.000-3.250
3.000-3.250
3.500-3.750
Z
1.188
1.188
1.563
1.563
SKIRTED
MINIATURE
'li
LARGE-BUTTON
NOVAR 9-PIN
LARGE -BUTTON
NOVAR 9-PIN
16A
16B
16C
16D
It
'" btJ
-17Outline X
1.562 MAX,
-18-
Outline X
Y
Z
17A 3.410 3.030 2.510'" 0.090
17B 4.160 3.780 3.260 - 3.440
Outline X
Y
18A 3.55 3.04 '" 0.13
18B 4.60 4.09'" 0.13
SKIRTED
1
1•563 MAX,
TI2
t'~ MAX.J ___ MI~~1.URE
r~1
Tl2
:.t
~gj:
L>- -,,~~
- <~
LARGE-BUTTON
DUODECAR 12-PIN
-19Outline X
19A
19B
19C
19D
19E
3-7/8
4
4-1/4
4-5/8
4-3/4
-20Y
3-5/16
3-7/16
3-11/16
4-1/16
4-3/16
Z
1-13/32
1-13/32
1-3/8
1-3/8
1-11/16
-21-
r=s~t::-~-- rfJj~i :'~·~"'_llMf~f;~E
If
3~
L
L'
I!
3~
14
4
±~
8
3
H
\ OCTAL
-22502
11J
\ OCTAL
-23-
ffi
Outlines
==========I
[
~ MAX.j /CAP
SMALL
",~ll
J
~,
LI- ,- ~ slJ
M-:----!,'
SMALL -SHELL
SMALL 4-,5-,6-, OR 7-PIN
-24--
Outline
X
24A 4-15/16
24B 4-17/32
if
-25-
y
4-3/16"" 1/8
3-25 /32 "" 1 /8
Outline
25A
25B
X
5
5-7/32-
y
4-7/16
4-1/4
l~MAX.~
j.1~
r-I-:-
....J
MAX .
-;;:1-
1.!1.
.L
32
1
3:
+j6
OCTAL
-26-
-27-
-28-
503
II
Circuits
II
The circuits included in this Manual used (tapped or transformer-coupled).
illustrate some of the more important
The voltage ratings specified for
applications of RCA receiving tubes; capacitors are the minimum dc working
they are not necessarily examples of voltages required. Paper, mica, or ce. commercial practice. These circuits have ramic capacitors having higher voltage
been conservatively designed and are ratings than those specified may be used
capable of excellent performance. Elec- except insofar as the physical sizes of
trical specifications are given for circuit such capacitors may affect equipment
components to assist those interested in layout. However, if electrolytic capacihome construction. Layouts and mechan- tors having substantially higher voltage
ical details are omitted because they ratings than those specified are used,
vary widely with the requirements of in- they may not "form" completely at the
dividual set builders and with the sizes operating voltage, with the result that
and shapes of the components employed. the effective capacitances of such units
Circuits designed for operation from may be below their rated value. The wattboth ac and dc voltage supplies should age ratings specified for resistors assume
be installed. in non·metallic cabinets or methods of construction that provide
properly insulated from metallic cabi- adequate ventilation; compact instalnets. Potentiometer shafts and switches lations having poor ventilation may reshould make use of insulated (plastic) quire resistors of higher wattage ratings.
knobs. In practical use, no metallic part
Circuits which work at very high
of an "ac/dc" chassis should be exposed frequencies or which are required to
to touch, accidental or otherwise. When handle very wide bandwidths demand
such circuits are tested outside of their more than ordinary skill and experience
cabinets, a line isolation transformer in construction. Placement of component
such as the RCA WP-25A Isotap should parts is quite critical and may require
be used.
considerable experimentation. All rf
Performance of these circuits de- leads to components including bypass
. pends as much on the quality of the com- capacitors must be kept short and must
ponents selected. and the care employed be properly dressed to minimize undein layout and construction as on the cir- ·sirable coupling and capacitance effects.
cuits themselves. Good signal reproduc- Correct circuit alignment and oscillator
tion from receivers and amplifiers re- tracking may require the use of a cathquires the use of good,quality speakers, ode-ray oscilloscope, a high-impedance
transformers, chokes, and input sources vacuum-tube voltmeter, and a signal
(microphones,. phonograph pickups, etc). generator capable of supplying a propCoils for the receiver circuits may erly modulated signal at the appropriate
be purchased at local parts dealers by frequencies. Unless the builder has had
specifying the characteristics required: considerable experience with broadband,
for rf coils, the circuit position (antenna high-frequency circuits, he should not
or interstage), tuning range desired, undertake the construction of such cir"and tuning capacitances employed; cuits.
Information on the characteristics
for if coils or transformers, the intermediate frequency, circuit position and application features of each tube
(1st if, 2nd if, etc.), and, in some cases, type are given in the TECHNICAL
the associated tube types; for oscillator DATA FOR RCA RECEIVING
coils, the receiver tuning range, the in- TUBES SECTION. This information
termediate frequency, the type of con- should be helpful in the understanding
vetter tube, and the type of winding and utilization of the circuits.
504
Circuits
===========
LIST OF CIRCUITS
22-1
Portable Battery-Operated Superheterodyne Receiver ........... "
22-2
Portable 3-W ay Superheterodyne Receiver. . . . . . . . . . . . . . . . . . . . ..
22-3
AC-Operated Superheterodyne Receiver ....................... "
22-4
ACjDC Superheterodyne Receiver.. . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-5
Automobile Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-6
144-McSuperregenerative Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-7
Citizens-Band Transceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-8
AMjFM Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-9
TRF AM Tuner (for high-fidelity local broadcast reception). . . . . ..
22-10 FM Tuner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-11 Three-Stage IF Amplifier Limiter and Ratio Detector (for monaural
or stereo tuner). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-12 FM Stereo Multiplex Adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-13 High-Fidelity Audio Amplifier (class AB 1 ; power output, 15 watts).
22-14 High-Fidelity Audio Amplifier (class AB 1 ; power output, 30 watts).
22-15 High-Fidelity Audio Amplifier (class AB 1 ; power output, 50 watts).
22-16 Two-Channel Sterophonic Amplifier (power output,
1 watt each channel) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-17 Two-Channel Sterophonic Amplifier With Tone Control
(power output, 1 watt each channel) . . . . . . . . . . . . . . . . . . . ..
22-18 Two-Channel Audio Mixer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-19 Phonograph Amplifier (power output, 1 watt) . . . . . . . . . . . . . . . . . ..
22-20 Microphone and Phonograph Amplifier (power output, 8 watts) .. "
22-21 Preamplifier for Amateur Receiver for 10-Meter (30Megacycle) Band (power gain, 25 to 35 db). . . . . . . . . . . . . ..
22-22 Preamplifier for Magnetic Phonograph Pickup (with RIAA
equalization) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-23 Preamplifier for Ceramic Phonograph Pickup (cathode. follower, low-impedance output) . . . . . . . . . . . . . . . . . . . . . . . ..
22-24 Low-Distortion Preamplifier (for low-output, highimpedance microphones) . . . . . . . . . . . . . . . . . . . . . . . . .
22-25 Two-Stage Input Amplifier (cathode-follower, lowimpedance output) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22-26 Bass and Treble Tone-Control Amplifier Stage. . . . . . . . . . . . . . . . . ..
22-27 Audio Control Unit (with volume and tone controls). . . . . . .
22-28 Code-Practice Oscillator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-29 Intercommunication Set (with master unit and two or
more remote units) .................... , . . . . . . . . . . . . . . ..
22-30 All-Purpose Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-31 Cathode-Ray Oscilloscope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-32 Audio-Signal Generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
22-33 Electronic Volt-Ohm Meter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..
Page
506
507
508
509
510
511
512
514
515
516
517
518
519
520
521
522
523
524
524
525
526
526
527
527
528
528
529
529
530
531
532
534
535
505
====== .BCA Receiving,Tube Manual
(22-1)
PORTABLE BA·TTERY;":-OPERA 'fED SYPERHETERODTNE RECEIYER.,
o,----Vl/lli...........=,- IIII
'B'
67.5 V
&.5MA
Ct C. - Ganged tuning capacitors: Ct, 10-274 pf; C"
7.5-122.5 pf
C, C. = Trimmer capacitors,
2-15 pf
C3= 56 pf, ceramic
C. C, CIO ClI = Trimmer capacitors for if transformers
C.=0.05 pl, paper, 50 v.
C. C,,=0.02 "f, paper, 100 v.
C,,=82 pf, ceramic
CII C,.=0.002 ilf, paper, 150 v.
C,,=33 pf, ceramic
C17=10 "f, electrolytic, 100 v;
506
C,,=O.0022 "f, paper; 600 v.
Lt = Loop antenna or ferriterod antenna, 540-1600 Kc
(with specified .values of
capacitance for Ct and C,)
Rl=O.l megohm, 0.25 watt
R.-15000 ohms, 0.25 watt
R.=3.3 megohms. 0.25 watt
R. = 68000 ohms, 0.25 watt •
R. = Volume control, potentiometer,2 megohms
R,=10 megohms,O.25 watt
R, = 4.7 megohms, 0.25 watt
R.R.=l megohm, 0.25 watt
RIO = 390 ohms, 0.25 watt
SI = Switch, double-pole, singlethrow
T, = Oscillator coll for use
with tuning-capacitor of
7.5-122.5""f, and 455 Kc if
transformer
T, T. = Intermediate-frequency
transformers, 455 Kc
(permeability-tuned type
may be used)
T. = Output transformer for
matching impedance of voice '
coil to 10000-ohm tube load
Circuits
(22-2)
PORTABLE 3-WAY SUPERHETERODYNE RECEIVER
POWER AMPLIFIEFI
TYPE 3V4
FlF' AMPLIF'lEFI
L.I
TYPE IT4
_L CI1ASSIS-DO NOT
mn CQIIINEtT TO GROUND
c. C. C. = Ganged tuning ca-
pacitors, 20-450 pf
C. C. C,=Trimmer capacitors,
4-30 pf
C. C.o C .. C17=100 pf, eeramic
C.=82 pf, ceramic
C,=5S0pf, eeramic
ell CIt Cu C16=Trimmer capacitors for if transformers
Cu=O.Ol "f, paper 400 v.
CIS C.. =0.002 "f, paper, 400 v.
C19=270 pI, eeramic
C.o=0.02 "f, paper, 400 v.
C .. C .. =0.005 "f, paper, 400 v.
C .. =0.1 "f, paper, 400 v.
C .. =0.05 "f, paper, 200 v.
C .. =0.05 "f, paper, 50 v.
C .. C" C .. =0.05 "f, paper, 400 v.
C .. =40 "f, electrolytic, 25 v.
C .. = 1S0 "f, electrolytic, 25 v.
C31C,,=20 "f, electrolytic,150 v.
L. = Loop antenna or ferrite-rod
antenna, 540-1S00 Kc (with
specified values of capacitanee for C. and Col
R. R. RlI=4.7 megohms, 0.25
watt
R. = 2.2 megohms. 0.25 watt
R,=O.l megohm, 0.25 watt
R.=5.S megohms, 0.25 watt
&=27000 ohms, 0.25 watt
R,=S8000 ohms, 0.25 watt
Rs = 3.3 megohms, 0.25 watt
R. = Volume control, potentiometer,l megohm
RIO = 10 megohms, 0.25 watt
RI2=0.22 megohm, 0.25 watt
Ru=l megohm, 0.25 watt
R" R .. =1800 ohms, 0.25 watt
R,,=0.22 megohm, 0.5 watt
RI7=1000 ohms, 0.25 watt
RI8 = 2700 ohms, 0.25 watt
RIO = 1500 ohms, 0.25 watt
R .. = 1800 ohms, 10 watts
R .. = 2300 ohms, 10 watts
S. = Switch, 4-pole doublethrow
S. = Switch, double-pole, singlethrow
T. = RF transformer, 540-1600
Kc
T, = Oscillator coil for use with
a 560-""f padder, 20-450 ""f
tuning capacitor, and 455 Kc
if transformer
T. T. = Intermediate-frequency
transformer•• 455 Kc
(permeability-tuned type
may be used)
T. = Output transformer for
matching impedance of voice
coil to 10000-ohm tube load
507
RCA Receiving Tube Manual
(22-3)
AC-OPERATED SUPERHETERODYNE RECEIVER
c. c. Cs= Ganged tuning
capacitors, 10-365 pf
C2. Co Cp=Trimmer capacitors,
4-30 pf
C. ClI=0.05I'f, paper, 50 v.
C.=0.05 I'f, paper, 400 v.
C7=Oscillator padding
cap'aeitor-follow oscillatorcOli manufacturer's recom ..
mendation
C.o= 56 pf, mica
en CI2 Cu C15=Trimmer
capacitors for if transformers
C.G C17=180 pf, mica
C.s C,,=O.Ol I'f, paper, 400 v.
C •• =20 I'f, electrolytic, 450 v.
C 20 =80 I'f, electrolytic, 450 v.
C 21 =120 pf; mica
C" C24=O.02 I'f, paper, 400 v.
508
C .. =20 I'f, electrolytic, 50 v.
C26=0.05I'f, paper. 600 v.
L=Loop antenna or ferrite-rod
antenna, 540-1600 Kc (with
specified values of capacitance for C, and C,)
R, R5=180 ohms, 0.& watt
R2=12000 ohms, 2 watts
R3=33000 ohms, 0.5 watt
R. R6=2.2 megohlll9. 0.5 watt
R7=0.1 megohm, 0.5 watt
Rs=Volume control,
potentiometer, 1 megohm
R, Ru=10 megohms, 0.5 watt
R.o= 1800 ohms, 2 watts
Ru R12=0.22 megohm, 0.5 watt
R14 R.6=0.47 megohm, 0.5 watt
R .. =8200 ohms, 0.0 watt
R.7=270 ohms, 5 watts
R18=15000 ohm., 1 watt
S=Switch on volume control
T,=RF transformer, 540-1600
Kc
T2=Oscillator coil for use with
10-365-l'l'f tuning capacitor
and 455-Kc if transformer
T. T.=Intermediate-frequency
transformers, 455 Kc
(permeability-tuned type
may be used)
T,=Power transformer. 250-0250 volts rms, 120 rna. de
T,=Output transformer for
matching impedance of voice
coil to a 10000-ohm plate-toplate tube load
Circuits
(22-4)
AC/DC SUPERHETERODYNE RECEIVER
PENTAGRID
~~~~~~~~~
POWER
AMPLIFIER
TYPE 50C5
DIODE DETECTOR,AVC,
T2
,-------,
1~¢rl':.PI~I~~~R
T3
AUD~~:EMti~~~ER
,..------...,
I
~2
I
I'
J
(
I
I
I
1
I "
l--"
CHASSIS
117-V.
AC
LINE
TYPE
126E6
TYPE
126A6
~'~J-_ _ _ _ _ _ _ _ _ _ _ _ _ _~_ _~
SWI
Cl C.=Ganged tuning capacitors; C" 10-365 pf; C" 7-115
pf
C,=Trimmer capacitor, 4-30 pI
C.=0.05 "f, paper, 50 v.
C.=O.1 "f, paper, 400 v.
C.=Trimmer capacitor, 2-17 pI
C, = 56 pf, ceramic
C.=30 "f, electrolytic, 150 v.
C. ClO=150 pf, ceramic
Cll Cu=0.02I'f, paper, 400 v.
C,,=0.002I'f, paper, 400 v.
ClI=330 pf, mica
C,,=0.05I'f, paper, 400 v.
C,,=50 I'f, electrolytic, 150 v.
L=Loop antenna or ferrite-rod
antenna, 540-1600 Kc (with
specified values of capacitance for C, and C,)
R,=0.22 megohm, 0.5 watt
R,=33000 ohms, 0.5 watt
R.=100 ohms, 0.5 watt
R.=3.3 megohms, 0.5 watt
R,=47000 ohms, 0.5 watt
R,=Volume control, potentiometer, 0.5 megohm
R7=4.7 megohms, 0.5 watt
R, R.=0.47 megohm, 0.5 watt
RlO=150 ohm., 0.5 watt
Rll=1200 ohms, 1 watt
Tl = Oscillator coil for use with
7-115-l'l'f tuning capacitor
and 455-Kc intermediatefrequency transformer
T, T,=Intermediate-frequency
transformers, 455 Kc
(permeability-tuned type
may be used)
T.=Output transformer for
matching impedance of voice
coil to 2500-ohm tube load
NOTE 1: The following tube types are recommended for a 100-ma-heater tube complement: 18FX6A
converter, 18FW6A if amplifier, 18FY6A detector and audio amplifier, 34GD5A power amplifier, and
36AM3B rectifier.
509
RCA Receiving Tube Manual
(22-5)
AUTOMOBILE RECEIVER
Ca
L-~~-----fL~3
:c~C~2~1------~::~~~~
F
L4
~ L5
10-150-0. ~0"'---------------.... TO ALL
;:'•• 1. ~2;'" 1. 1.;~~'
HEAlERS
VOLTS -
C" C" C18=Ganged tuning
capacitors; C" 7-100 pf;
C" C18; 80-350 pf
C2, C3, Cs, Ct3, C19, C2o=100pf,
mica
C.=27 pf, mica
C,=0.047I'f, paper, 100 volts
C., CI6=O.I}'f, paper, 100 volts
Cit, CIO, Cu, C14=Trimmer
Capacitors for if transformers
C,,=330pf, mica
C .. =125 pf, mica
CI7=130 pf, mica
C21=0.0056I'f, paper, 100 volts
C .. = 0.01 I'f, paper, 100 volts
C", C .. =0.47 I'f, paper, 100
volts
Cu, C,,=300 pf, mica
C,,= 500 }'f, electrolytic, 25 v.
C .. =250 I'f, electrolytic, 25 v.
C .. =500 I'f, electrolytic, 3 v.
F=Fuse,5 a.
L.=Antenna Coil foruse-.rith C.
510
C23~ ~2t25~ ~C26
L,= RF coil for Use with C,
L,=Oscillator coil, tapped, for
use with C18, and 262.6-Kc
if transformer
L.=RF choke, 6 a.
L.=Filter choke, 10 mh., 5 a.
R.=0.56 megohm, 0.5 watt
R,=0.47 megohm, 0.5 watt
R3, R .. =2.2 megohm, 0.5 watt
R.=150 ohms, 0.5 watt
R,= 1 megohm, 0.5 watt
R.=88000 ohms, 0.5 watt
R,=100 ohms, 0.5 watt
R., RD, RI3=4.7 megohms,
0.5 watt
R.o=22 megohms, 0.5 watt
R,,=47000 ohms, 0.5 watt
R,,=10 megohms, 0.5 watt
R,,=82000 ohms, 0.5 watt
R .. =Volume control,
potentiometer, 1 megohm,
tapped at 0.3 megohm
R17=Tone control,
potentiometer, 1 megohm
R18=47 ohms, 1 watt
R .. =220 ohms, 1 watt
R .. =15 ohms, 0.5 watt
R .. =1 ohm, 1 watt
S=Snaker, 3.2-ohm voice coil
T'26l5i~cut transformer,
T,=IF output transformer,
262.5 Kc
T.=Audio driver transformer;
impedance of primary, 2200
ohms; of secondary, 10
ohms; dc resistance of
primary, 180 ohms; of
secondary, 1.6 ohms;
primary current, 15 mao dc.
T.=Audio output transformer;
impedance of primary, 20
ohms, of secondary, 4 ohms;
dc resistance of primary, 2
ohms max.; primary current,
0.5 amperes dc.
(22-6)
144-McSUPERREGENERATIVERECEIVER
C\ C,= 0.1 "f, paper, 400 v.
C. C.= 100 pf, mica, 500 v.
C. eli. C1= 20 ",f, electrolytic,
460 v.
C.= 251'f, electrolytic, 50 v.
C. = 25 "f, electrolytic, 25 v.
C" = 0.002· "f, paper, 600 v.
ClI"; 0.01 "f, paper, 400 v.
C" = 0'.005 "f, paper, 400 v.
en =50'pf, ,silver mica, 300 v.
Cl;j,= Ganged or split-stator tuning capacitor, 10 pf max. pe-r
.section
CIS = 0.006 "f, mica. 300 v.
C16=Quench-freqliency control,
trimmer eapacitor, 3-30' pf,
ceramic or mica
F:;::Fuse, 0.5 ampere
Jl = Jack for earphones
Ll L2= rf transformer; LI,
1 turn No. 18 Enam. wire;
L,,4 turns of No. 12 Enam.
copper wire on a 7'2" I.D.
form (144 Mc): adiust spacing to set band
L3=Filter choke, 12 henries,
70 rna.
. Rl=Potentiometer, 50000
, ohms, 1 watt, wire wound
R, R, = 47000 ohms, 1 watt
R. = 27000 ohms, 0.5 watt
Rs = 2700 ohms, 1 watt
R, R7=0.1 megohm, 0.5 watt
R. = 270 ohms, 1 watt
R9 = Volume control, potentiometer"O.5 megohm
RIO = 4.7 megohms. 0.5 watt
RFCI = One-quarter wavelength
(20.5 inches at 144 Mc) of No.
23 ·Enam. close wound on a
Ji" form
RFC, = RF choke. 8 mho
Tl = Power transformer,
300-0-300 volts rms, 70 rna.;
6.3 volts, 1.5 amperes
T2=OUtpUt transformer for
matching impedance of voice
coil to 5000-.ohm tube load
NOTE:' The use of an rf amplifier is recommended to minimize radiation from the superregenerative
detector.
511
RCA Receiving Tube Manual
(22-7)
CITIZENS-BAND TRANSCEIVER
512
Circuits
(22-7)
CITIZENS-BAND TRANSCEIVER (Conl'd)
C,=470 pf, ceramic, 500 v;
C,=3.3 pf, ceramic, 500 v.
C3 C, C, C. ClO CI3 C14 C16 Cao
C .... C.. C61=1000 pf, ceramic,
500v.
C. C.=5 pf, ceramic, 500 v.
Co=190 pf, ceramic, 500 v.
Cu = 18 pf, mica, 500 v.
C12=24 pf, mica, 500 v.
C15=10 pf, ceramic, 500 v.
CI,=50 I'f, electrolytic, 500 v.
C18=8 pf, ceramic, 500 v., N750
C19 C.. Coa C .. C.. C.. C41 C.. C"
C" C .. = O.Oll'f,'ceramic,
500 v.
C20=2.2 pf, ceramic, 500 v.
C2I=270 pf, mica, 500 v.
C" C.. =56 pf, mica, 500 v.
C,,=62 pf, mica, 500 v.
C.. = 18 pf, ceramic, 500 v., N750
C26=56 pf, ceramic, 500 v., N330
C27=0.015I'f, paper, 400 v.
C •• = Variable, 2.3-15 pf
C..= Variable, 1.5-10 pf,
ceramic, 600 v.
C.. C,,= Part of T,
C" C.. =Partof T.
C .. C.. C" C.. C..= 5000 pf,
ceramic, 500 v.
C .. C51= 100 pf, ceramic, 500 v.
C" C.. =Part of T,
Coo=3300 pf, paper, 600 v.
C" C,,=200 pf, mica, 500 v.
C,,=10 I'f, electrolytic; 50 v.
C .. = 150 pf, mica, 500 v.
CR=Diode,IN34
Ll = Oscillator coil, transmitter,
RCA stock No. 226183 or
equiv.
L, L.= 500 I'f, rf choke
L3= Power-amplifier coil, RCA
stock No. 226184 or equiv.
L,=2nd-harmonic trap, RCA
stock No. 226187 orequiv.
Rl R, R15 R19 R20=47000 ohms,
0.5 watt
R3= 56 ohms, 0.5 watt
R. Ru R23=27000 ohms,
0.5 watt
R, &.=56000 ohms, 0.5 watt
R6=5600 ohms, 1 watt
R,=1000 ohms, 2 watts
R.=0.18 megohm, 0.,5 watt
R. R21=68 ohms, 0.5 watt
RlO=27000 ohms, 1 watt
R12 R,,=4700 ohms,l watt
R13 R .. =10 megohms, 0.5 watt
R14 R .. R36=2.2 megohms,
0.5 watt
R16=39 ohms, 0.5 watt
Rn=82 ohms, 0.5 watt
R18= 15000 ohms, 1 watt
R .. R .. = 1.5 megohms, 0.5 watt
R" R •• R" R47=0.47 megohm,
0.5 watt
R26= 150 ohms, 0.5 watt
R" R30=O.1 megohm, 0.5 watt
R,.=0.68 megohm, 0.5 watt
R31=27000 ohms, 2 watts
R,,= 68000 ohms, 0.5 watt
R .. = 3 megohms, 0.25 watt
R,,=0.33 megohm, 0.5 watt
R .. =l megohm, 0.5 watt
R .. =2 megohms, 0.5 watt
R41 R .. =0.22 megohm, 0.5 watt
R .... = 330 ohms, 1 watt
R .. =8.2 megohms, 0.5 watt
S, = Rotary switch, channel
select transmit, RCA stock
No. 226189 orequiv.
S2= Rotary switch, channel
select receive, RCA stock
No. 226189 orequiv.
Tl=RF interstage transformer,
RCA stock No. 226191
orequiv.
T2=Oscillator coil, receiver,
RCA stock No. 226192
or equiv.
T. T. T,= IF transformers,
RCA stock No. 226193
or equiv.
To=Output and modulation
transformer, RCA stock
No. 226194 or equiv.
NOTE: See general considerations for construction of high-frequency and broadband circuits on page 504.
513
---------------= RCA Receiving Tube Manual ....--------------(22-8)
AM/FM RECEIVER
RF AMP./FM CONY.
1ST IF AMP.
AUDIO
OUTPUT
2ND FM IF
AMP.ILIM.,
AMDET.
G
F
R33
J.C~
120
*
·C52
:J.;:
CR2
52
R35
VOLTS~>-----"--~--"""'--,\Mr--------; ·C57
C53
AC-DC~
~N-OFF
Csa
" I.ON S 3
OFF)
TYPE
50C5
-¥
TYPE
12BE6
TYPE
i9HR6
TYPE
12AU6
TYPE
I4GT8
J1 L:!::J -
CHASSIS
R36
-
* On FM, the ae line serves as an FM antenna by means of a special line cord having a third wire which
is not physically connected to the line.
NOTE: See general considerations for construction of high-frequency and broadband circuits on page 504.
514
Circuits
(22-9)
L
TRF AM TUNER
For High-Fidelity
Local Broadcast Reception
RF AMPLIFIER
TYPE 6BA6
5
TYPE 6X4
Rg
Cl C.= Ganged tuning ca pacitors, 10-365 pI
C2 Cs=Trimmer capacitors,
4-30 pI
C3= 0.01 p.f, paper or ceramic,
200 v.
C4= 0.01 p.f, paper or ceramic,
400 v.
C. Cll=O.l 1'1, paper, 400 v.
C7=250 pI, mica or ceramic
400 v.
C.=10 uf, electrolytic, 350 v.
Clo=250 pC, mica or ceramic,
200 v.
C12=25 1'1, electrolytic, 25 v.
C13=O.05 1'1, paper, 200 v.
C14=20 1'1, electrolytic, 450 v.
C,,=80 I'f, electrolytic, 450 v.
F=Fuse, 1 ampere
L=Loop antenna or lerrite-rod
antenna, 540-1600 Kc (with
specified values 01 capacitance lor Cl and C,)
Rl = 180 ohms, 0.5 watt
R2=Sensitivity control, potentiometer, 5000 ohms
R.=33000 ohms, 1 watt
R. R.= 1000 ohms, 0.5 watt
R,=O.1 megohm, 0.5 watt
R7=0.15 megohm, 0.5 watt
R.= 1500 ohms, 0.5 watt
R.=0.47 megohm. 0.5 watt
R!O=7000 ohms, 10 watts
TI=RF transformer, 540-1600
Kc.
T,= Power transformer, 250-0250 volts rms, 40 ma.;
6.3 volts, 1.2 amperes
Parts List for AM/FM RECEIVER
CI=PartofRI
c,= Part of R,
C,= 36 pf, ceramic, 500 v.
C. Cll=Ganged tuning capacitors, tune Ll and T2 to
88-108 Me
Cil C12= Trimmer capacitors,
1-7 pf
C6 Cs=6.8 pf, ceramic, 500 V"
N220
C7 C" C,,=1000 pf, feedthrough, 500 v.
C.=l1 pf, ceramic, 500 v.
Clo=68 pr, ceramic, 500 v.
C13=21 pI, ceramic, 500 v.
C14=500 pf, feedthrough, 500 v.
ClII=O.22",f, ceramic disc, 500 V.
C17 C" C56=2000 pI, feedthrough, 500 v.
C18=0.15I'f, paper, 200 v.
C" C21=2 pf, feedthrough, 500 v.
C22=Tuning capacitor; value,
with cable capacitance,
tunes T, to 10.7 Me
C23=4700 pf, ceramic, 500 v.
C" C30=2700 pf, ceramic, 500 v.
Cos C27=Part of T.
C" C28= Part of T5
C29 C32= 100 pi, ceramic,
500v.,NPO
C:" C",=Part of T,
C" C49=1000 pf, ceramic, 500 v.
Cali C47 CSI C56=O.Ol p.i, ceramic,
500 v.
C" C37=330 pf, mica, 500 v.
C38=O.Oll'f, paper, 200 v.
C,,=2 I'f, electrolytic, 50 v.
C40= 5600 pfJ ceramic, 500 v.
C41=O.ll'f, paper, 200 v.
C42=0.022I'f, paper, 200 v.
C .. C .. = Ganged tuning
capacitors, tune T. to 5401650 Kc
eu C46=Trimmer capacitors,
12 pC
C .. C,,= Part of T,
C,,'= 501'1, electrolytic, 150 v.
C,,=0.047 1'1, paper, 400 v.
C,,=80 I'f, electrolytic, 150 v.
Cfl8=0.1 p.i, ceramic, 500 v.
CR1=AFC crystal diode
CR,=Silicon rectifier, 1N3756
LI=RFcoil
L2=Antenna, air loop with
back cover
L,= 11'f, rf choke
Rl =0.5 megohm (includes Cl)
R,=0.5 megohm (includes C,)
R,=2200 ohms, 0.5 watt
R,= 1200 ohms, 0.5 watt
R, R19=33000 ohms, 0.5 watt
R, R18=47000 ohms, 0.5 watt
R7 R27 R,,=0.47 megohm,
0.5 watt
R.=3900 ohms, 0.5 watt
R. R,,=22000 ohms, 0.5 watt
RIO R33= 1 megohm, 0.5 watt
Rn R17=68 ohms, 0.5 watt
R12=4700 ohms, 0.5 watt
R,,=0.33 megohm, 0.5 watt
R14=220 ohms, 0.5 watt
R" R,,=1000 ohms, 0.5 watt
R16=3.3 megohms, 0.5 watt
R2
AI4
1.7
AI2
TYPE
- TO )
SPEAKE A
VOICE
COIL
7868
1.7
9
A21
t
Cg
+
0
A22
+
CIO
CII
AUXILIAAY
POWEA FOA
PREAMPLIFIER,
TONE - CONTROL,
AND MIXER
CIRCUITS
'='
c.=25 pf, electrolytic, 50 v.
C2=22 pi, ceramic or mica,
600 v.
, C.=80 pf, electrolytic, 450 v
C. C.=0.25 pf, paper, 600 v.
C.=O.Olpf, paper, 600 v.
C, Ca=0.05 pf, paper, 600 v.
C. Cll=40 pl, electrolytic,
500 v.
C.o=100 pf, electrolytic, 50 v.
C •• =20 pf, electrolytic, 450 v.
F=Fuse, 3 amperes, 150 v.
R.=Volume control, potentiometer,l megohm
R.=10000 ohms, 0.5 watt
520
&=0.22 megohm, 0.5 watt
R.=820 ohms, 0.5 watt
R,= 10 ohms, 0.5 watt
R.=0.18 megohm, 0.5 watt
R,=15000 ohmsd:5 per cent,
2 watts
Ra= 15000 ohms d: 5 per cent,
0.5 watt
R.=1000 ohms, 0.5 watt
R.o=22000 ohms, 0.5 watt
Rll=2000 ohms, 2 watts
R .. R13=O.l megohm, 0.5 watt
R .. R .. =1000 ohms, 0.5 watt
R16 R17=56 ohms, 0.5 watt
R18=270 ohms, 0.5 watt
Ru=Hum balance adjustment,
potentiometer, 100 ohms,
0.5 watt
R,,=120 ohms, 10 watts
R21=50 ohms, 10 watts
R,,=10000 ohms, 2 watts
TI = Output transformer (having 16-ohm tap for feedback
connection) for matching
impedance of voice coil to
6600-ohm plate-to-plate tube
load; 50 watts; frequency
response, 10 to 50000 cps.
T.=Power transformer, 375-{}..
375 volts rms, 160 rna.; 6.3
v., 5 a.; 5 v., 3 a.
Circuits
(22-15)
HIGH-FIDELITY AUDIO AMPLIFIER
Class AB 1; Power Output, 50 Watts
RII
+
CI~
TO }
SPEAKLR
VOICE
COIL
117 V
~
~
AUXILIARY POWER
rOR PREAMPLIFIER.
TONE A~NTROL,
MIXER d~CUITS.
C, C.=40 "f, electrolytic, 450 v.
C. C.=0.02"f, paper, 400 v.
C. C.=l ,d, paper, 400 v.
C7=0.002 "f to 4-ohm tap;
0.0015 "f to 8-ohm tap; or,
0.001 "f to 16-ohm tap;
paper, 400 v.
C. C.=0.05 "f, paper, 600 v.
C,o=20 "f, electrolytic, 600 v.
Cu = 100 "f, electrolytic, 150 v.
C,,=40 "f, electrolytic, 450 v.
F=Fuse, 5 amperes
L=Choke,8 h., 250 ma., dc
resistance 60 ohms, or Ie...
R,=Volume control, potentiometer, 0.5 megohm
R.=4700 ohms, 0.5 watt
R3=0.82 megohm, 0.5 watt
R.=0.22 megohm, 0.5 watt
R.=8200hms, 0.5 watt
R.=10 ohms, 0.5 watt
R7 R,=15000 ohms, 2 watts
R. R,o= 1.5 megohms, 0.5 watt
Ru=83000 ohms, 2 watts
R" R,,=1.3 megohms, 0.5 watt
R13=47 ohms, 0.5 watt
R" R19=0.15 megohm, 0.5 watt
R" R18=390 ohms, 0.5 watt
R17=AC balance control,
potentiometer, 500 ohms,
Note 4
R.o=0.15 megohm, 1 watt
R21 R .. =0.83 megohm, 1 watt
R" R .. =0.12 megohm, 2 watts
R .. R .. =O.l megohm, 0.5 watt
R27 R28=4700 ohms, 0.5 watt
R'9=600 ohms to 4-ohm tap;
820 ohms to 8-ohm tap; or,
1200 ohms to 16-ohm tap;
0.5 watt
R30=Hum balance adjustment,
potentiometer, 100 ohms,
Note 3
R31=0.12 megohm, 5 watts
R .. R" Ra, R37=33000 ohms,
2 watts
R .. =Bias adjustment, potentiometer 50000 ohms, Note 1
R36=0.27 megohm, 1 watt
R38=10000 ohms, 1 watt
R,,=Screen-grid voltage adjustment, potentiometer,
25000 ohms, 2 watts, Note 2
R.o=15000 ohms, 2 watts
R .. = 12000 ohms, 2 watts
R"",0.22 megohm, 2 watts
R .. =22000 ohms, 2 watts
SR=Selenium rectifier, 20 ma.,
135 volts rms
T,=Output transformer for
matching impedance of voice
coil to 5000-ohm plate-toplate tube load; 50 watts;
frequency response, 10 to
50000 cps.
T,=Power transformer, 600-0600 volts rms, 200 ma., 6.3
v., 5 a.; 5 v., 3 a.
T3=Filament transformer, 6.3
volts, center tapped,
1 ampere
NOTES: All of the following adjustments should be made before amplifier is placed into operation.
(1) With 5R4.GYB rectifier out of socket, adjust R .. for reading of -40 volts hetween junction of R"
and R .. and B-. (ground bus). (2) With speaker connected, adjust R3. for reading of 400 volts between
pin 2 of 6GF7 and -B (ground bus). (3) With input shorted, adjust R30 for minimum hum from speaker.
(4) With input open and volume controlR, set for maximum volume, adjust R17 for minimum hum
from speaker.
521
RCA'Receiving Tube Manual
(21-16)
TWO-CHANNEL STEREOPHONIC AMPLIFIER
Power Output, 1 Watt Each Channel
0-1:.
R.
/
RU
INPUTCRYSTAL OR
aRA~
~-r-4~-------r~~~--~--~---r--,
~
C" C.-O.22 ,d, 400 V;, paper
C.-0.1 ,.t, 400 V., paper
Co, C,-60 pf, 25 v.,.electrolytic
C.- 60,d 150 V., electrolytic
Cf, c.-56 ,.t, 150 V., electrolytic
F-Fw!e, a amperes
522
IE
SPEAKER
VOICE COIL
R" R.-Volume control,
potentiometer, 1.6 megohms,
ganged
R" Ro=47000 ohms, 0.5 watt
R.=Balance control,
potentiometer, 2 megohms
R., R,=60 ohms, 1 watt
R.-220 ohms, 2 watts·
&-280 ohms, 2 watts
Rlo=12 ohms, 1 watt
Ru=O.22 megohm, 0.5 watt
T .. To-Output tranaformer
for matching impedance of
voice coil to aOOO-ohm tube
load.
Circuits
(22-17)
TWO·CHANNEL STEREOPHONIC AMPLIFIER
With Tone Control
Power Output, 1 Watt Each Channel
TI
~
TO
SPEAlI(R
VOICE
COIL
Cl2
T2
INPUT
CRYSTAL OR
CERAMIC
PHONOGRAPH
PICKUP
"
AC
'V
Cl Cu=0.047 pf, paper, 150 v.
C, C.=0.01 pf, paper, 150 v.
C. C.=0.022 I'f, paper, 150 v.
C.=8 I'f, electrolytic, 150 v.
C, C.=680 I'l'f, ceramic or
mica, 400 v.
C. CIO=50 I'f, electrolytic, 25 v.
C12=0.068r.f, paper, 150 v.
C13=200 I' , electrolytic, 150 v.
C14=100 I'f, electrolytic, 150 v.
F=Fuse,2 amperes
Rl R,=Volume control,
potentiometer, 2 megohms,
ganged.
R, R,=l0 megohms, 0.5 watt
R. R.=0.22 megohm, 1 watt
R,=0.022 megohm, 2 watt.
R. R.= Tone control, potentiometer, 2 megohms, ganged.
RIO Rn=0.47 megohm, 0.5 watt
R12 R13 R .. = 0.22 megohm, 0.5
watt
R14R,,=120 ohms, 2 watts
R16=750 ohms, 2 watts
R17=6.8 ohms, 2 watts
R18=lOO ohms, 10 watts
Tl T,=Output transformer for
matching impedance of voice
coil to 1000-ohm plate tube
load. Turns ratio 20 to 1;
primary current 90 mao dc;
power-handling capacity,
3.5 watts minimum.
523
RCA Receiving Tube Manual
(22-18)
TWO-CHANNEL AUDIO MIXER
Voltage Gain From Each Grid of 6EU7 to Output is Approximately 20
C2ToUTPUT TO
GRID OF
NEXT STAGE
RS
Ra
+250 V
R. R. R8=1 megohm, 0.5 watt
R, R.=0.1 megohm, 0.5 watt
C.=10 "f, electrolytic, 25 v.
C.=0.05 "f, paper, 400 v.
R. R7=Potentiometers, 0.1
megohm audio taper
R.=1200 ohms, 0.5 watt
(22-19)
PHONOGRAPH AMPLIFIER
Power Output, 1 Watt
·J-J"'"--------1
v '---- - - - - - - ----~
--1 I
CI
I I
TGO
SPEAKER
VOICE
COIL
CHASSIS
117 V
7
AC
o
C.=0.02 "f, paper, 400 v.
C.=0.082 "r, paper, 400 v.
C. C.= 40"r, electrolytic, 150 v.
F=Fuse, 1 ampere
J =Input connector, shielded,
for crystal phonograph
pickup.
524
R.=Volume control, potentiometer, 0.5 megohm, audio
taper
R.=10000 ohms, 0.5 watt
R.=0.22 megohm, 0.5 watt
R. R,=56 ohms, 0.5 watt
R.=22 ohms, 0.5 watt
R7=3300 ohms, 1 watt
R8=210 ohms, 10 watts
T=Output transformer for,
matching impedance of voice
coil to 3000-ohm tube load.
Circuits
(22·20)
MICROPHONE AND PHONOGRAPH AMPLIFIER
Power Output, 8 Watts
c
C, C,=100 pf disc-ceramic,
300 v.
C3=0.05 I'f, paper, 200 v.
C.=8 I'f, electrolytic, 450 v.
C.= 16 I'f, electrolytic, 450 v.
C.=25 I'f, electrolytic, 450 v.
C7=0.1 I'f, paper, 200 v.
C.=O.OOI "f, disc-ceramic, 300 v.
C.=O.Oll'f, disc-ceramic, 300 v.
ClO=470 pf,disc-ceramic,300v.
CIl=4700 pf, disc-ceramic,
300 v.
C12=4 I'f, electrolytic, 450 v.
C13= 0.05 I'f, paper, 600 v.
C14=25 I'f, electrolytic, 25 v.
C" C16 C17=20 I'f, electrolytic,
450 v.
F=Fuse, 1 ampere
J,=Jack for high-impedance
crystal microphone input;
max. input: 2 millivolts peak
J,=Jack for crystal phonopickup input; max. input:
0.5 volt peak
L=Filter choke, 5 henries,
200 rna.
R, R16= 10000 ohms, 0.5 watt
R,=Volume Control, potentiometer,l megohm
R3=2.2 megohms, 0.5 watt
R. Rs R20=0.22 megohm, 0.5
watt
R,=27000 ohms, 0.5 watt
R,= 1200 ohms, 0.5 watt
R7 R13=O.l megohm, 0.5 watt
R9 R11 =Tone control, potentiometer, 0.5 megohm
RlO=22000 ohms, 0.5 watt
R12=12000 ohms, 0.5 watt
R14= 1800 ohms, 0.5 watt
R,,=0.47 megohm, 0.5 watt
R17=0.15 megohm, 0.5 watt
R18=180 ohms, 2 watts
R19=47000 ohms, 1 watt
R21=50 ohms, 10 watts
R" = 8200 ohms, 2 watts
S,=Switch, SPST
S,=Switch, SPDT
T,=Power transformer, 3000-300 v., 90 rna.; 6.3 v., 3.5 a.
center tapped; 5 v., 2 a.
T,=Output transformer for
matching impedance of voice
coil to 4000-ohm tube load;
10 watts
525
RCA Receiving Tube Manual
(22-21)
PREAMPLIFIER FOR AMATEUR RECEIVER
FOR lO-METER (30-MEGACYCLE) BAND
Power Gain, 25 to 35 db
TYPE
6CW4
TYPE
6CW4
•
+100 TO
150 V
~------------------~-----------o61cV
C" C7=5 pf, 500 v., mica
C2, Ca, C., Cli, C6, Cs, C9=O.OOl
pI, 500 v., ceramic
L., L,= 18 turns of N 0.32
Enam. copper wire wound
on ~" J.D. slug-tuned form.
Lt tuned to 32 Mc; L. to
29.5 Mc. Input and output
link, 1 ~ tUrns. Input and
output impedance, 75 ohm••
Rt, R.=100 ohm., 0.5 watt
R,=0.47 megohm, 0.5 watt
R,= 1000 ohm., 0.5 watt
(22-22)
PREAMPLIFIER FOR MAGNETIC PHONOGRAPH PICKUP
With RIAA Equalization
Rg
.----,......VlI\r....,.--.-,..--N /'----O+250V.
J
Ra
C. C.=25 "f, electrolytic, 25 v.
C, C.=20 "f, electrolytic, 450 v.
C,=O.l "f, paper. 600 v.
C.=0.00S3 "r ,., 5 per cent.
paper, 600 v.
C,=O.OI "f ,., 5 per cent,
paper, 600 v.
C.=180pf,., 5 percent,
ceramic or mica, 500 v.
(includes capacitance of
output cable)
526
"7
J =Input connector, .hielded,
for high-impedance magnetic
phono pickup (10 my. output,
approx.)
Rt = Value depends on type of
magnetic pickup used. Follow pickup manufacturer'.
recommendations.
R, R7=2700 ohms, 0.5 watt
R, R,=0.1 megohm, 0.5 watt
R.=39000 ohms, 0.5 watt
R,=0.47 megohm, 0.5 watt
R,=0.68 megohm, 0.5 watt
R.= 15000 ohm., 1 watt
RlO=22000 ohm., 0.5 watt
(22-23)
PREAMPLIFIER FOR CERAMIC· PHONOGRAPH PICKUP
Cathode-Follower {Low-Impedance) Output
r-----.-~~----~----o+230-300V
RI
J
AF" OUTPUT
(LOAO= 50000
OHMS MIN.)
C.=O.l I'f, paper, 400 v.
C,=O.Oll'f, paper, 400 v.
C3=20 I'f, electrolytic, 400 v.
C.=0.25I'f, paper, 400 v.
C,=0.22I'f, paper, 600 v.
J =Input connector, shielded,
for high-impedance ceramic
phono pickup (0.5 v. output)
R.=1.8 megohms, 0.5 watt
R.=Volume control, potentiometer, 0.5 megohm, audio
taper
R3=0.82 megohm, 0.5 watt
R.=0.22 megohm, 0.5 watt
R,=lOOO ohms, 0.5 watt
R. R.=47000 ohms, 0.5 watt
R,=4700 ohms, 0.5 watt
R,=l megohm, 0.5 watt
RlO=1800 ohms, 0.5 watt
(22-24)
LOW-DISTORTION PREAMPLIFIER
For Low-Output High-Impedance Microphones
+250-300
-------1
v
OUTPUT
(LOAD. 220000 OHMS MIN.)
-~----
INPUT
C.=25 I'f, electrolytic, 25 v.
C.=40 I'f, electrolytic, 450 v.
C,=0.047 I'f, paper, 400 v.
R.=2.2 megohms, 0.5 watt
C,=0.22 I'f, paper, 400 v.
R.=O.l megohm, 0.5 watt
Sensitivity= 3 lnillivolts for output of 220 millivolts
R3= 1 000 ohms, 0.5 watt
R.=0.47 megohm, 0.5 watt
R,=22000 ohms, 0.5 watt
527
RCA Receiving Tube Manual
(22-25)
TWO-ST AGE INPUT AMPLIFIER
Cathode-Follower (Low-Impedance) Output
r-_----o
O. 0.-0.1I'f, paper, 400 v.
0.-25 I'f, electrolytic, 25 v.
0.-0.5 I'f, paper, 200 v.
+ 300 V,
R.=Volume control, potentiometer, 0.5 megohm
R,= 0.22 megohm, 0.5 watt
R. R.=5600 ohms, 0.5 watt
&,-27000 ohms, 0.5 watt
R,=0.56 megohm, 0.5 watt
(22-26)
BASS AND TREBLE TONE-CONTROL AMPLIFIER STAGE
cs
~~""'''''''''''~~(~'''''--O
OUTPUT
(LOAD = 100000
OHMS MIN.)
0.0.=20 I'f, electrolytic, 450 v.
0.=0.0022 I'f, paper, 400 v.
0.=0.047 I'f, paper, 400 v.
R.=0.47 megohm, 0.5 watt
0.=0.1pf, paper, 400 v.
R2= 1500 ohms, 0.5 watt
0,=0.22 I'f, paper, 400 v.
R. R7= 15000 ohms, 0.5 watt
C.=0.0022 I'f, paper, 400 v.
R.=22000 ohms, 0.5 watt
07=0.022 I'f, paper, 400 v.
R, R. R11=0.1 megohm, 0.5 watt
0.=220 pf, ceramic or mica,
500 v.
Sensitivity=0.5 volt rms for output of 1.25 volts with controls set for
528
R,=1000 ohms, 0.5 watt
R.=Bass control, potentiometer, 1 megohm
R .. =10000 ohms, 0.5 watt
R12=Treble control, potentiometer, 1 megohm
fiat response.
Circuits
(22-27)
AUDIO CONTROL UNIT
With Volume and Tone Controls
B+
TO PHONO
PREAMP.
Re
+300 V
03
~4s
~
PHONO
R27
R.=1.5 megohms, 0.5 watt
R.=2 megohms, 0.5 watt
R.=Potentiometer, 0.5
megohm, audio taper
R.=0.83 megohm, 0.5 watt
R, Rl. R,,= 15000 ohms, 0.5 watt
R.=0.56 megohm, 0.5 watt
R .. =2200 ohms, 0.5 watt
R11 R16=0.22 megohm, 0.5 watt
R .. R27=l megohm, 0.5 watt
R13 R21=O.l megohm, 0.5 watt
0.0,=0.01 "f, paper, 400 v.
0,011=20 "f, electrolytic, 450 v.
O. O.=O.l"f, paper, 400 v.
R.0 .. =25 "f, electrolytic, 25 v.
0.=0.001 "f, paper, 400 v.
0,=470 pf, mica, 800 v.
0.=4700 pf, mica, 800 v.
0 .. 0 .. =0.47 "f, paper, 400 v.
0 .. =0.088 "f, paper, 400 v.
R. R, R,=0.27 megohm, 0.5
watt
R,,=1200 ohms, 0.5 watt
R17 R .. = Potentiometers, 0.5
megohm, audio taper
R .. =22000 ohms, 0.5 watt
R,,=2700 ohms, 0.5 watt
R22=5600 ohms, 0.5 watt
R23=27000 ohms, 0.5 watt
R,,=0.47 megohm, 0.5 watt
R,,= Potentiometer, 0.1
megohm, audio taper
(22-28)
CODE-PRACTICE OSCILLATOR
~~
~
r
ex
0.0,=20 "f, electrolytic, 150 v.
0.=0.001 "f, paper, 200 v.
0.=0.03 "f, paper, 200 v.
F=1/8 ampere
x
J = Input jack for key
R.=1500 ohms, 1 watt
R2=Potentiometer,0.1
volts rms, 15 rna; 6.3 volts,
0.6 ampere
T2=OUtPUt transformer,
universal
megohm, 0.5 watt
T.=Power transformer, 125
NOTE: Select any two terminals of secondary of T, to give desired tone.
529
RCA Receiving Tube Manual
(22-29)
INTERCOMMUNICATION SET
With Master Unit and Two or More Remote Units
REMOTE UNIT
REMOTE UNIT
CI C,=0.0022 ILl, paper, 200 v.
C.=0.005 ILl, paper, 200 v.
C. C,=60 ILl, electrolytic, 150 v.
F=Fuse,l ampere
RI = Volume control, potentiometer, 0.5 megohm, audio taper
taper
R,=6.8 megohms, 0.5 watt
R. R.=0.47 megohm, 0.5 watt
R,=10000 ohms, 0.5 watt
R, R7=68 ohms, 0.5 watt
R8=2200 ohms, 1 watt
SI S,S.=Speaker, permanentmagnet, voice-coil impedance
3-4 ohms
SWI=On-off switch, single-pole
single-throw, attached to volume control RI
SW,=Talk-listen switch,
double-pole double-throw
SW.=Station-selector switch,
rotary
TI =Input transformer, 4-ohm
primary, 25000-ohm secondary
T, = Output transformer, 3000-ohm
primary, 4-ohm secondary
Ta=Power transformer, 125
volts rms, 50 rna., 6.3 volts
rms, 2 amperes
NOTES: The leads from the LISTEN-TALK switch to TI and T, should be kept as far apart as possible
to prevent undesirable regeneration effects.
Connections to the remote speaker units should be made with low-resistance wire, preferably shielded
"intercom" cable.
530
Circuits
===========
(22-30)
ALL-PURPOSE POWER SUPPLY
TI
E
&.3 V
:
--.!:!..
RI
TO HEATERS
B+
!~b!
TO FILTER
lOR Z
CII
cZI
=
FILTER I
B-
-
~+
I =
POWER SUPPLY I
*
Cz
RB
BlliU
B-
RZ
RI
B+
TO HEATERS
CII
TO FILTER
I,Z,OR 3
cZI
-
FILTER 3
B-
POWER SUPPLY 2
POWER
SUPPLY
1
(6BC3)
TRANSFORMER
Rl
140. rna, 7h, 33 ohms
Stancor
166 ohms
5W
PC or PM
Stancor C1421
8177
or equiv.
(300-0-30.0.)
or equiv.
Stancor
PC or PM
8412
(40.0.-0-~0.0.)
or equIV.
2
(6X4)
CHOKE (Ll)
Stancor
P-6368
(30.0-0-30.0.)
or equiv.
Stancor
PM or PC
8419
(240.-0-240.)
or equiv.
20.0. ma, 4h,
146 ohm.
Thordarson
20.C64
or equiv.
66 ohms
10.W
R.
Cl
C.
OUTPUT
FILTER VOLTS
MA
360.
340.
320.
60.
80.
120.
236
230.
215
60.
80.
120.
450.
425
no.
120.
160.
20.0.
310.
30.0.
280.
120.
160.
20.0.
350.
30.0.
260.
20.
40.
60.
2
260.
230.
220.
20.
40.
60.
3
346
30.0.
260.
20.
40.
60.
1
266
223
190.
20.
40.
60.
2
20.0.
180.
170.
20.
40.
60.
3
260.
220.
180.
20.
40.
60.
40. pf
40. "f
450. Vdc 450. Vdc
2
40. "f
40. "f
60.0. Vdc 60.0. Vdc
80. ma, 12h, 50.0. ohm. 60.0. ohms 40. "f
40. "f
460. Vdc 450. Vdc
375 ohm.
5W
3W
Thordarson
20.C53
or equiv.
80. ma, 12h, 50.0. ohm. 60.0. ohms 40. "f
40."f
450. Vdc 450. Vdc
375 ohms
6W
3W
Thordarson
20.C63
or equiv.
2
NOTE: Bleeder RB can he omitted if an external load i. permanently connected acro.s the output
terminals. Bleeder current should he approximately In per cent of the load current.
531
RCA Receiving Tube Manual
(22-31)
CATHODE-RA Y OSCILLOSCOPE
OSCILLOGRAPH
TUBE
TYPE
I• .........!AQPI
8
J
6BR8AJ
jl2AT7J
6BK7tX4
532
6~ ~IO
ll2AT7
92CL-12068
Circuits
(22-31)
CATHODE-RAY OSCILLOSCOPE (Cont'd)
Cl C, C6 c. Cll = Trimmer
capacitors, 4-40 pI, Arco
No.422 or equiv.
C, C" COl Cu C"=0.1,,I,
paper, 400 v.
C.=64 pI, ceramic disc, 500 v.
C,=22 pI, ceramic disc, 500 v.
C,=140 pI, ceramic disc, 500 v.
C,=410pl, ceramic disc, 500 v.
CI() en C40 C43=20 p.f, electrolytic, 450 v.
C12= 1500 pi, ceramic disc,
500v.
C14= 1200 pf, ceramic disc,
500v.
CI6 C24 C25= 0.02 p.f, ceramic
disc, 600 v.
Cn C .. =10 "I, electrolytic,
450 v.
C18 C42=40 "I, electrolytic,
450 v.
C20=560 pI, ceramic disc, 500 v.
C22= 0.05 p.f, ceramic disc, 200 v.
C"=0.05,,I, paper, 200 v.
C26=5 pf, ceramic disc, 150 v.
C27=0.22 "I, paper, 400 v.
C,,=0.022 "I, paper, 400 v.
C .. =2200 pI, ceramic disc, 400 v.
C,,=220 pI, ceramic disc, 400 v.
Cal = 15 pf, ceramic disc, 500 v.
C,,= 180 pI, ceramic disc, 200 v.
Caa= 150 pI, ceramic disc, 200 v.
C34 Ca6 C37 Cu=O.l p.f, paper,
200 v.
C3D Gi5 C46=O.Ol p.i, ceramic
disc. 600 v.
C44=0.5"I, paper, 1000 v.
Cn= 12 pf, tubular ceramic,
150 v.
ID1=Pilotlamp, No.47
Ll = Peaking coil, 20 "h
L2 L.=Peaking coil, 36"h
(wound on lO,OOO-ohm,
0.5-watt resistor)
Rl=0.68 megohm, 0.5 watt
R, R" R" R68 R79=0.47
megohm, 0.5 watt
R.=0.91 megohm, 0.5 watt
R,·=O.l1 megohm, 0.5 watt
R,R, R12 R21 R40R41=1
megohm, 0.5 watt
R6=33000 ohms, 0.5 watt
R. R .. R" R.,= 10000 ohms,
0.5 watt
R. R62 R71 R .. = 15000 ohms,
0.5 watt
R,,=820 ohms, 0.5 watt
Rll=47000 ohms, 0.5 watt
R13= Variable, wire-wound,
5000 ohms, 2 watts, ClarostatA43-5000 or equiv.
R14=6800 ohms, 1 watt
R15 R,o R" R38= 1200 ohms,
0.5 watt
R16=2200 ohms, 0.5 watt
R17= Wire-wound, 2500 ohms,
5 watts, IRC Type PW5 or
equiv.
R18= 100 ohms, 0.5 watt
R19=4700 ohms, 1 watt
R22=820 ohms, 1 watt
R23=0.22 megohm, 0.5 watt
R,.=82000 ohms, 0.5 watt
R,,=120 ohms, 0.5 watt
R" R37= 1800 ohms, 1 watt
R" R .. =1000 ohms, 0.5 watt
R31 = Wire-wound, 2400 ohms,
5 watts, IRC Type PW5 or
equiv.
R,,=5000 ohms, 0.5 watt
R,,= 1.2 megohm, 0.5 watt
RIl R .. R" R66=0.82 megohm,
0.5 watt
R42 R48= Variable, 1 megohm,
0.5 watt
R46= Variable, 0.1 megohm,
0.25 watt
R46=0.18 megohm, 0.5 watt
R., Rn=Variable, 0.25
megohm, 0.5 watt
R,,=O.l megohm, 1 watt
Rso=68000 ohms, 0.5 watt
R" =3300 ohtllS, 0.5 watt
R,,=0.27 megohm, 0.5 watt
R,,=680 ohms, 0.5 watt
R .. =39000 ohms, 0.5 watt
Raa= Variable, 5 megohms,
0.5 watt
Rr,6 R59 R67=2. 7 megohms,
0.5 watt
R57=3.3 megohms, 0.5 watt
R58 R72 R7!i R81=0.12 megohms,
0.5 watt
Roo R70= 10 megohms, 0.5 watt
R61 R69=2400 ohms, 0.5 watt
R64= Variable, 2 megohms,
0.5 watt
R,,=Variable, 50000 ohms,
0.5 watt
R73=O.l megohm, 0.5 watt
R74=Variable,10000 ohms,
0.25 watt
R,,=4700 ohms, 0.5 watt
R78= Wire-wound, 1500 ohms,
7 watts, IRC Type PW7 or
equiv.
R80= Variable, 0.5 megohm,
0.5 watt
R82= Variable, 75000 ohms, 0.5
watt (includes ac switch)
SI=Rotary switch, vertical
range selector, 9 positions,
4 sect.ions, RCA stock
N 0.219199 or equiv.
S,=Rotary switch, horizontal
sweep selector, 6 positions, 5
sections, RCA stock No.
219200 or equiv.
S,=Switch, dpdt, sync, Stackpole Type SS-33 or equiv.
Tl = Power transformer t 117
volts, 60 cps, RCA stock
No. 218122 or equiv.
X, Y, Z,=Testpoints
NOTE: For home construction of this circuit, the complete Kit RCA-WO-33A (K)
is recommended because of the large number of special components used. This
circuit is also available in wired form as the RCA-WO-33A.
533
RCA Receiving Tube Manual
(22-32)
AUDIO SIGNAL GENERATOR
SINE-WAVE OSCILLATOR
SHAPERS
AUDIO
SIGNAL
OUTPUT
;~; CI4
Ci5
L.:s: __ ~I~ _ _ _ _ .J
Cl=O.l /Lf, ceramic, 400 v.
C, C.=0.25 1'1 ceramic, 400 v.
C3 C6 C7=20 1'1, electrolytic,
350 v.
C4=Trimmer capaC'itor, 5-80 pf
C,= 11'1, paper, 200 v.
C, C17=40 1'1 electrolytic, 150 v.
CIO= 100 1'1, electrolytic, 150 v.
ell en C20= 3-section electrolytic; 20 1'1, 250 v.; 60 1'1,
450 v; 20 1'1, 450 v.
C12=2.2 pf, ceramic
C13= 3.3 pI, ceramic, 500 v.
Ca=7.5 - 81'1, trimmer
Cls=27 pf, ceramic, 600 v.
C16= Variable, 2 gang; RCA
stock N 0.220226 or equiv.
534
C18=50 1'1, electrolytic, 250 v.
II=Lamp, 3 watts, 120 v.
1,= Pilot lamp, No.47
LI = Reactor, RCA stock
No.220215 or equiv.
RI = 3900 ohms, 2 watts
R, RI2 R,,= 1 megohm, 0.5 watt
R3=4700hms, 1 watt
RI=3900 ohms, 1 watt
R,= 12000 ohms, 1 watt
R6=Potentiometer, 12000 ohms
R7=3300 ohms, 0.5 watt
R, R.=22000 ohms, 1 watt
Rlo= 56000 ohms, 0.5 watt
Ru=Potentiometer, 2500 ohms,
0.5 watt
R13 R14= Potentiometer,
5000 ohms
R15=8200 ohms, 0.5 watt
R16=12000 ohms, 0.5 watt
R17=4700 ohms, 1 watt
RI,=0.47 megohm, 0.5 watt
RI9=0.27 megohm, 0.5 watt
R20= 15000 ohms, 2 watts
R21=Potentiometer, 750 ohms
R23=36000 ohms, 0.5 watt
R24=0.36 megohm, 0.5 watt
R,,=3.6 megohms, 0.5 watt
R" = 36 megohms, 1 watt
R27=8 megohms, 1 watt
R,,=0.8 megohm, 0.5 watt
R,.=80000 ohms, 0.5 watt
R,,=8000 ohms, 0.5 watt
R31 R" R,,=6200 ohms, 0.5 watt
R" R34=750 ohms, 0.5 watt
R36=680 ohms, 0.5 watt
Circuits
AUDIO SIGNAL GENERATOR (Cont'd)
R37=Potentiometer, 100 ohms
R38=Potentiometer, 100 ohms,
with switch 8-3
8. = Rotary switch, function
selector, 8 position, 3 wafer,
RCA stock No. 220216 'or
equiv.
82= Rotary switch, range
selector, 4 position, 2 wafer,
RCA stock N 0.220217 or
Tl~~!~ertransformert 117
volts rms, 60 cps, RCA stock
No.2202140requiv.
(22-33)
ELECTRONIC VOLT.OHM METER
F B
8
~
RI9
B=Battery,1.5 v.
C.=470 pf, ceramic disc, 1600 v.
C,= O.OOl"f, ceramic disc, 500 v.
C.= 0.47 "f, tubular, 400 v.
C, C,=0.02"f, ceramic disc,
400 v.
C. C,=0.005"f, ceramic disc,
200 v.
C.= 10 "f, electrolytic, 400 v.
F=Fuse, 0.5 ampere
CR=8elenium rectifier, Radio
Receptor Co. #8Y1Borequiv.
M. = Meter, dc, 0-200 "a
NE,= Neon lamp
R.= DC-voltage probe isolating
resistor, 1 megohm, 0.25 watt
R,= 138000 ohms, 0.25 watt
R.= 320000 ohms, 0.5 watt
R,=0.9 megohm,l watt
R, R18= 1 megohm, 0.25 watt
R, R16 R" R27= 10000 ohms,
0.5 watt
R,=20000 ohms, 0.25 watt
R.= 70000 ohms, 0.26 watt
R.=0.2 megohm, 0.25 watt
RlO= 0.7 megohm, 0.25 watt
Ru=2 megohms, 0.25 watt
R12= 7 megohms, 0.25 watt
RI3=8.2 ohms, wire-wound,
0.5 watt
R14= 100 ohms, 0.25 watt
R .. = 1000 ohms, 0.26 watt
R17=O.l megohm, 0.25 watt
RlO=lOmegohms, 0.25 watt.
R20=20 megohms, 0.26 watt
R21=91 megohms, 0.5 watt
R .. = 10000 ohms, potentiometer, ac calibration, 0.5 watt
R23= 10000 ohms, potentiometer dc calibration, 0.5 watt
R,,= 15000 ohms, potentiometer, ohms adjustment,
0.25 watt
R26= 10000 ohms, potentiometer, zero adjustment,
0.26 watt
R28=3.3 megohms, 0.5 watt
R,,=6.8 megohms, 0.5 watt
Roo Ru=330 ohms, 0.5 watt
R32= 16000 ohms, 0.6 watt
R33=27000 ohms, 0.5 watt
R .. = 10000 ohms, potentiom.
eter, ac balance, 0.5 watt
R36=47000 ohms, 0.5 watt
R36=0.22 megohm, 0.6 watt
8. = Range selector switch, 7
position, RCA stock No.
217924 or equiv.
8,= Function selector switch,
6 position, RCA stock No.
217928 or equiv.
T.=Power transformer, 105-125
volts rms, 50-60 cps, RCA
stock No. 217921 orequiv.
NOTE: Switches are shown in their maximum counterclockwise positions (SI=
1.5 v., R X 1; S2="OFF"). For home construction of this or a similar circuit, the
complete Kit RCA-WV-77E (K) or RCA-WV-98C (K) is recommended because
of the large number of special components used.
535
Index
Page
Absolute Maximum System of Ratings. . .. 69
ACIDC Superheterodyne Receiver... .... 509
AC-Operated Superheterodyne Receiver .... 508
Admittance, Input. . . . . . . . . . . . . . . . . . . . . .. 16
All-purpose Power Supply. . . . . . . . . . . . . . . 531
AM Detection. ................ ........
42
AMIFM Receiver... . . . . . . . . . . . . . . . . . . . 514
Amplification. . . . . . . . . . . . . . . . . . . . . . . . . .
14
Amplification Factor (,,) . . . . . . . . . . . . . . . .. 12
Amplifier:
audio control unit, circuit. . . . . . . . . . . . 529
audio-frequency. . . . . . . . . . . . . . . . . . . .. 14
audio mixer, circuit. . . . . . . . . . . . . . . .. 524
cathode-drive. . . . . . . . . . . . . . . . . . . . . .. 27
cathode-follower. . . . . . . . . . . . . . . . .. 27, 30
cathode-follower, circuit ........... 527, 528
class A ............................ 14, 17
class AB .......................... 14, 22
class ABI. . . . . . . . . . . . . . . . . . . . . . . . .... 23
class AB,. . . . . . . . . . . . . . . . . . . . . . . . . .. 25
class B ........................... 14, 26
class C............................. 14
high-fidelity ............... 26, 66, 519-521
intermediate-frequency. . . . . . . . . . . . . .. 517
limiter ............................ 36, 45
low-distortion input, circuit. . . . . . . . .. 527
luminance...................... ..... 38
parallel......... ... ........... ...... 17
phase-in verter. . . . . . . . . . . . . . . . . . . . . .. 33
preamplifier, circuit .. ............ . 526, 527
push-pull .......................... 17, 20
radio-frequency .................... 14, 36
remote-cutoff ...................... 16, 50
resistance-coupled .............. 15, 29, 491
sharp-cutoff. . . . . . . . . . . . . . . . . . . . . . . .. 50
sync................................ 39
television. . . . . . . . . . . . . . . . . . . . . . . . . .. 36
tone-control. . . . . . . . . . . . . . . . . . . . . . . .. 34
tone-control, circuit. . . . . . . . . . . . . . . .. 528
video............................... 37
voltage. ............................ 14
volume-expander .................... , 32
Amplitude Modulation (AM) . . . . . . . . . . . .. 42
AM Tuner. . . . . . . . . . . . . . . . . . . . . . . . . . . .. 515
5
Anode ............. ~...................
Application Guide for RCA
Receiving Tubes. . . . . . . . . . . . . . . . . . . .. 75
Arc-Back Limit. ........................ 72
Audio Control Unit with Volume and
Tone Controls .................... " 529
Audio Mixer......................... .. 524
Audio Signal Generator. . . . . . . . . . . . . . . . .. 534
Automatic Frequency Control (AFC). . . . .. 56
Automatic Gain Control (AGC) ........ .46, 48
Automatic Volume Control (AVC)......... 46
Automobile Receiver... . . . . . . . . . . . . . . . .. 510
Bass'and Treble Tone-Control
Amplifier Stage. . . . . . . . . . . . . . . . . . . .. 528
Beam Power Tubes. . . . . . . . . . . . . . . . . . . . .
8
Bias:
battery............................
60
cathode (self) ...................... 60, 61
diode..............................
43
536
Page
grid-resistor ................... .44, 60, 62
self (cathode) ...................... 60,61
Bypassing. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
61
Calculation of:
amplification factor. . . . . . . . . . . . . . . . .
12
cathode (self-bias) resistor ........... 60, 61
cathode load resistor. . . . . . . . . . . . . . . .
31
13
control-grid-plate transconductance. . .
filament resistor power dissipation. . . . . 59
filament (or heater)' resistor value. . . . .
59
harmonic distortion ............. 19, 21, 25
heater warm-up time. . . . . . . . . . . . . . . .
69
load resistance .................. 19,20,24
operating conditions from
conversion nomograph.. . . . . . . . . . . .
21
peak inverse plate voltage. . . . . . . . . . . .
72
plate efficiency ........... : . . . . . . . . .
13
plate resistance. . . . . . . . . . . . . . . . . . . . .
12
power output .................. 19, 21, 24
power sensitivity.. .. . . . . . . . . . . . . . . . .
13
70
screen-grid voltage dropping resistor.. .
transconductancll ................... 13, 30
voltage amplification (gain) ...... 15, 30, 32
Capacitor-Input Filter. . . . . . . . . . . . . . . . . .
65
Cathode:
bias...............................
60
bypassing. . . . . . . . . . . . . . . . . . . . . . . . . .
61
connection. . . . . . . . . . . . . . . . . . . . . . . . .
60
current.. ..........................
directly heated. . . . . . . . . . . . . . . . . . . . .
drive...............................
follower ... _.............. 27, 30, 527,
indirectly heated. . . . . . . . . . . . . . . . . . . .
ionic-heated. . . . . . . . . . . . . . . . . . . . . . . .
resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . .
types..............................
Cathode-Ray Oscilloscope. . . . . . . . . . . . . . .
Characteristic Curves, Interpretation of. . .
Characteristics:
amplification factor. . . . . . . . . . . . . . . . .
control-grid-plate transconductance. . .
conversion transconductance. . . . . . . . .
dynamic...........................
plate resistance. . . . . . . . . . . . . . . . . . . . .
static... . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Charts and Tables:
grid-No.2 input rating chart. . . . . . . . .
picture tube characteristics chart. . . .. .
outline drawings....................
resistance-coupled amplifier. . . . . . . . ..
Choke-Input Filter. . . . . .. . . . . . .. . .. . .. .
. Chrominance Channel...................
Circuit Diagram of:
ac/dc superheterodyne receiver. . . . . . .
ac-operated superheterodyne receiver. .
All-purpose power supply. . . . . . . . . . . .
AM/FM receiver.... ........... ....
audio-control unit. . . . . . . . . . . . . . . . . .
audio signal generator. . . . . . . . . . . . . . .
automobile receiver. . . . . . . . . . . . . . . . .
bass and treble tone-control amplifier
stage............ ................
cathode-ray oscilloscope. . . . . . . . . . . . .
citizens-band transceiver. . . . . . . . . . . .
59
3
27
528
4
6
61
3
532
73
12
13
13
12
12
12
70
484
500
491
65
38
509
508
531
514
529
534
510
528
532
512
INDEX (Continued)
Page
code practice oscillator. . . . . . . . . . . . . . 629
electronic volt-ohm meter ........... " 636
FM stereo multiplex adapter. . . . . . . . . 518
FM tuner. . . . . . . . . . . . . . . . . . . . . . . . . 616
high-fidelity. 15-w audio amplifier. . . . . 619
high-fidelity. 30-w audio amplifier. . . . . 620
high-fidelity. 60-w audio amplifier..... 621
intercommunication set. . . . . . . . . . . . . . 630
low-distortion preamplifier. . . . . . . . . . . 627
microphone and phonograph preamplifier 626
phonograph amplifier. . . . . . . . . . . . . . . 624
portable superheterodyne receiver. . . . . 606
portable 3-way superheterodyne receiver 607
preamplifier for 10-m. 30-Mc amateur
receiver. . . . . . . . . . . . . . . . . . . . . . . . . 626
preamplifier for ceramic phonographpickup. . ........................ 627
preamplifier for magnetic phonographpickup.......................... 626
superregenerative (144-Mc) receiver... 611
three-stage if amplifier/limiter and
ratio detector. . . . . . . . . . . . . . . . . . . . 517
TRF AM tuner. . . . . . . . . . . . . . . . . . . . 616
two-channel audio mixer. . . . . . . . . . . . 624
two-ehannel. 1-w stereo amplifier. . . . . 622
two-channel. 1-w stereo amplifier
with tone control. .......... " . . . . 623
two-stage input amplifier. . . . . . . . . . . . 628
Citizens-Band Transceiver. . . . . . . . . . . . . . 612
Code Practice Oaeillator .. , , . . . . . . . . . . .. 429
Color Picture Tubes. . . . . . . . . • . . . . . . . . . .
11
Color Television. . . . . . . . . . . . . . . . . . . . . . .
38
Contact Potential. . . . . . . . . . . . . . . . . . . . . .
63
Conversion Nomograph. Use of. . . . . . . . . .
21
Conversion Transconductance.. . . . . . . . . . .
13
Corrective Filter. . . . . . . . . . . . .. . . . . . . .. .
32
Cross-Modulation ...................... 16. 62
Current:
cathode............................
69
dc output. . . . . . . . . . . . . . . . . . . . . . . . . .
71
grid .............................. 14. 23
peak plate. . . . . . . . . . . . . . . . . . . . . . . . .
71
plate..............................
5
Curves. Interpretation of Characteristic. . .
73
Cutoff ................................ 16. 75
Dark;. Heater. . . . . . . . . . . . . . . . . . . . . . . . . .
Deflectioll Circuits:
horizontal output. . . . . . . . . . . . . . . . . . .
verti~1 output. . . .. . .. .. .. .. .. . . .. ..
Degeneration (See Inverse Feedback) . . . . .
Delayed Automatic Volume Control
(DAVC).. ........ .................
Demodulation.... . . . . . . . . . . . . . . . . . . . .. .
Design-Center System of l\atings... . . . . . .
Design-Maximum System of Ratings. . . . . .
Detection:
diode..............................
discriminator. . . . . . . . . . . . . . . . . . . . . . .
full-wave diode. . . . . . . . . . . . . . . . . . . . .
grid bias. . . . . . . . . . . . . . . . . . . . . . . . . . .
grid resistor end, capacitor. . . . . . . . . • .
ratio detector.. .. . .. . . . . .. . . . . . . . . . .
4
53
52
28
47
42
69
69
42
46
43
44
44
46
Page
Diode:
biasing............................
48
5
considerations. . . . . . . . . . . . . . . . . . . . . .
detection. . . . . . . . . . . . . . . . . . . . . . . . ..
42
'load resistor.. .. . . . . . . . . . . . . . . . . . . . .
43
Discriminator. . . . . . . . . . . . . . . . . . . . . . . . . .
46
Dress of Circuit Leads. . . . . . . . . . . . . . . . . .
64
Driver ............................ 17.28.26
Dynamic Characteristics. . . . . . . . . . . . . . . .
12
Electron:
considerations. . . . . . . . . . . . . . . . . . . . . .
8
secondary ...........•............•.. 8. 9
Electronic Volt-Ohm Meter.............. 535
Electrons. Electrodes. and Electron
Tubes.............................
8
Electron Tube Application. . . . . . . . . . . . . . .
14
Electron Tube Characteristics.... . . . . . . . .
12
'Electron Tube Installation..... . . . . . . . . . .
58
Electron Tube Testing. . . . . . . . . . . . . . .. .. ' 487
Electron-Ray Tubes. . . . . . . . . . . . . . . . . . . .
49
Emiaaion:
current............................
6
secondary ........................... 8. 9
teat. .............................. 488
28
Feedback. Inverse. . . . . . . . . . . . . . . . . . . . . .
Filament (also see Heater and Cathode):
operation ........................... 8. 68
resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . .
59
58
series operation.. . . . . . . . . . . . . . . . . . ..
shunt resistor.... . . . . . . . . . . . . . . . . . ..
69
supply voltage.. . . . . . . . . . . . . . . . . . . . .
68
Filter:
capacitor-input ............ ',' . . . . . . .
66
choke-input. . . . . . . . . . . . . . . . . . . . . . . .
66
corrective.. . . . . . . . . . . . . . . . . . . . . . . ..
32
radio-frequency.. . . . . . . . . . . . . . . . . . . .
65
smoothing. . . . . . . . . . . . . . . . . . . . . . . . .
65
FM Detection. . . . .. . . . . . . . . . . . . . . . . . . .
46
FM Stereo Multiplex Adapter. . . . . . . . . . . 618
FM Tuner. . . . . .. ...... . . . . . . . . . . . . . . . 516
Formulas (see Calculation)
Frame Grid. . . . . . . . . . . . . . . . . . . . . . . . . . .
7
Frequency Conversion. . . . . . . . . . . . . . . . . .
54
Frequency Modulation (FM) ............ 42. 46
Full-Wave Diode Detection..............
48
Full-Wave Rectifier ..................... 6.40
Fuses. Use of. . . . . . . . . . . . . . . . . . . . . . . . . .
60
Gain (Voltage Amplification) ........ ' . . .
15
Generic Tube Types. . . . . . . . . . . . . . . . . . . .
4
Grid:
anode.............................
66
bias. ..............................
60
bias detection. . . . . . . . . . . . . . . . . . . . . .
44
control. ............................. 6. 7
current ........................... 14. 2S
resistor ........................... 16, 62
44
resistor and capacitOr detection. . . . . . .
screen.............................
7
suppressor. . . . . . . . . . . . . . . . . . . . . . . . .
8
voltage supply . . . . . . . . . . . . . . . . . . . ..
60
537
INDEX (Continued)
Grid-Plate Capacitance .. ; . . . . . . . . . . . . . .
Grid-Plate Transconductance. . . . . . . . . . . .
Page
Page
7
18
Noise ................................. 36, 73
Noise Figure ......................... .
37
10
Novar ............................... .
Novar Tube, Parts of., ................ .
74
Nuvistor............................. .
10
Nuvistor Tube, Structure of ............ .
2
Half-Wave Rectifier ..................... 5,40
Harmonie Distortion ............... 19, 21, 25
Heater:
cathode............................
4
cathode bias.... . . . . . . . . . . . . . . . . . . . .
60
cathode connection... . . . . . . . . . . . . . . .
60
resistor. . . . . . . . . . . . . . . . . . . . . . . . . . . .
59
series operation. . . . . . . . . . . . . . . . . . . . .
58
shunt resistor.. .. .. . . . . . . . . . . . . . . . . .
59
supply voltage... . . . . . . . . . . . . . . . . . . .
58
warm-up time. . . . . . . . . . . . . . . . . . . . . .
69
Hexode Mixer.. .. . . . . . . . . . . . . . . . . . . . . . .
55
High-Fidelity Amplifiers ................ 26, 66
High-Fidelity, 15-w Audio Amplifier...... 519
High-Fidelity, 30-w Audio Amplifier...... 520
High-Fidelity, 50-w Audio Amplifier. ..... 521
53
High-Voltage Regq\ation. . . . . . . . . . . . . . . .
58
Horizontal Output Circuits. . . . . . . . . . . . . .
Hum and N oiBe Characteristics. . . . . . . . . .
73
IF Amplifier/Limiter and Ratio Detector .. 517
Impedance, Input......................
16
Input Capacitance... . . . . . . . . . . . . . . . . . . .
78
Instantaneous Peak Voltage. . . .. . . . . . . . .
72
Intercommunication Set. . . . . . . . . . . . . . . .. 580
Intereleetrode Capacitanees .............. 7, 78
Intermediate Frequeney, Production of. . .
54
Interpretation of Tube Data ..... ',' . . . . . .
69
Inverse Feedback:
29
constant-current type. . . . . . . . . . . . . . .
constant-voltage type. . . . . . . . . . . . . . .
28
Key: Baaing Diagrams ...... Inside Back Cover
Kinescopes. . . . .. .. . .. . . . . . . . .. . . . . . . . .
10
Limiters ............. n................
36
Load:
resistance. . . . . . . . . . . . . . . . . . . . . . . . .
20
resistance line ...................... 18, 28
Low-Distortion preamplifier. . . . . . . . . . . .. 527
Luminance Amplifier.. ... . . . . . . . . . . . . . . .
88
Maximum Ratinge .................. , ,"
69
Mercury-Vapor Rectifier:
6
considerations. . . . . . . . . . . . .. . . . . . . . .
interference ,from. . . . . . . . . . . . . . . . . . .
66
Mho-micromho.........................
18
Microphone and Phonograph Amplifier. ... 525
Miniature Tube, Structure oL . . . . . . . . . . .
82
Mixer:
audio .............................. 524
hexode.............................
55
pentagrid. . . . . . . .. . . . . . . . . . . .. .. . . .
55
Modulated Wave ...................... 42, 45
Modulation. . . . . . . . . . . . . . . . . . . . . . . . . . . .
42
Modulation-Distortion............... , ... 16, 62
Multi-Electrode and Multi-Unit Tubes. . . .
9
Multiplex Adapter for FM Stereo. . . . . . . . 518
Multivibrator. . . . . . . . . . . . . . . . . . . . . . . . . . ,50
Mutual Conductance (see Transconductance)
538
Operation, Typical Values..............
Oscillator:
considerations. . . . . . . . . . . . . . . . . . . . . .
multivibrator ...................... :
relaxation. . . . . . . . . . . . . . . . . . . . . . . . . .
synchroguide. . . . . . . . . . . . . . .. . . . . . . .
Oscilloscope. . . . . . . . . . . . . . . . . . . . . . . . . . .
Outlines of Tubes. . . . .. .. . .. .. . .. .. . .. .
Output Capacitance. . . . . . . . . . . . . . . . . . . .
Output Circuits:
horizontal. .. . . . . . . . . . . . . . . . . . . . . . . .
vertical. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output-Coupling Devices. . . . . . . . . . . . . . . .
73
50
50
50
51
582
500
73
58
52
66
Parallel Operation ..................... 17, 40
Peak Inverse Plate Voltage. . . . . . . . . . . . . .
72
Peak Plate Current. . . . . . . . . . . . . . . . . . . . .
71
Pentagrld Converter .................... 9, 54
Pentagrid Mixer. . . . . .. . . .. . . . . . . . . . . . .
55
Pentode Considerations. . . . . . . . . . . . . . . . . .
8
Phase Inverter. . . . . . . . . . . . . . . . . . . . . . . . .
33
Phonograph Amplifier................... 524
Phonograph and Tape Preamplifiers. . . . . .
85
Picture :rube:
basing diagrams . . . . .. . . . . . . . . . . . . .. 486
characteristiea chart. . . . . . . . . . . . . . . .. 484
corona considerations. . . . . . . . . . . . . . . .
68
10
deflection. . . . . . . . . . . . . . . . . . . . . . . . . .
dust considerations. . . . . . . . . . . . . . . . .
68
essential elements. . ... . . . . . . . . . . . . . .
10
handling precautions. . . . . . . . . . . . . . . .
68
68
high-voltage considerations... . . . . . . . .
humidity considerations. . . . . . . . . . . . .
68
safety considerations. . . . . . . . . . . . . . . .
68
screen............................. 10
structure. . . . . . . . .. . . . . . . . . . . . . .. . .
10
x-ray radiation precautions. . . . . . . . . . .
68
Plate:
current............................
5
dissipation. . . . . . . . . . . . . . . . . . . . . . . . .
70
efficiency ...................... ,. . .
13
load...............................
20
resistance. . . . . . . . . . . . . . . . . . . . . . . . . .
12
60
voltage supply......................
Plate-Cathode Capacitance .............. 7, 73
Portable Superheterodyne Receiver. . . . . . . 506
Portable 8-Way SuperheterodyneReceiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . 507
Power Output:
calculations ................. 18, 20, 21, 24
teat ............................ ; .. 489
Power Sensitivity.......................
18
Power Supply ........................ 58, 531
Preamplifier for Amateur Receiver. . . . . . . 526
Preamplifier for Ceramic Phonograph
Pickup.............................. 527
INDEX (Continued)
Page
Page
Preamplifier for Magnetic Phonograph
Pickup.............................. 526
35
Preamplifiers, Phonograph and Tape. . . . .
Push-Pull Operation ................... 17, 20
Radio-Frequency:
amplifier .......................... 14, 36
filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65
Ratings:
absolute-maximum system. . . . . . . . . . .
69
design-center system. . . . . . . . . . . . . . . .
69
design-maximum system............ .
69
Ratio Detector '.' ..................... 46, 517
Reading List. . . . . . . . . . . . . . . . . . . . . . . . . .. 544
Receiving Tube Chart. . . . . . . . . . . . . . . . . .
75
Rectifiers:
full-wave ........................... 5, 40
half-wa ve .......................... 5, 40
ionic-heated cathode. . . . . . . . . . . . . . . .
6
40
parallel operation of. . . . . . . . . . . . . . . . .
plate-characteristics curves. . . . . . . . . . .
73
voltage doubler. . . . . . . . . . . . . . . . . . . . .
41
Relaxation Oscillator. . . . . . . . . . . . . . . . . . . .
50
Remote-Cutoff Tubes .................. 16, 50
Resistance-Coupled Amplifier .......... 15, 491
33
Resistance Coupling. . . . . . . . . . . . . . . . . . . .
Resistor:
cathode (self-biasing). . . . . . . . . . . . . . . .
61
center tap.... . . . . . . . . . . . . . . . . . . . . . .
60
filament. . . ........................
59
filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
65
grid............... ................
15
plate load ......................... 20, 21
screen-grid ........................ 63, 70
Saturation Current. . . . . . . . . . . . . . . . . . . . .
5
Screen Grid (Grid No.2):
considerations. . . . . . . . . . . . . . . . . . . . . .
7
input..............................
70
voltage supply. . . . . . . . . . . . . . . . . . . . . .
63
Secondary Electrons ..................... 8, 9
Secondary Emission. . . . . . . . . . . . . . . . . . . .
8
Self Bias (cathode bias) . . . . . . . . . . . . . . . . .
60
Shielding. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
64
Short-Circuit Test. . . . . . . . . . . . . . . . . . . . .. 487
Signal Generator. . . . . . . . . . . . . . . . . . . . . . . 534
37
Signal-to-Noise Ratio. . . . . . . . . . . . . . . . . . .
Space Charge ........................... 5, 9
Static Characteristics. . . . . . . . . . . . . . . . . . .
12
Stereo Circuits .................. 518, 522, 523
Superheterodyne Receiver:
ac/dc......................... ..... 509
ae-operated. . . . . . . . . . . . . . . . . . . . . . .. 508
portable. . . . . . . . . . . . . . . . . . . . . . . . . .. 506
portable 3-way. . . . . . . . . . . . . . . . . . . .. 507
Superregenerative Receiver. . . . . . . . . . . .. 511
Suppressor Grid (Grid No.3) . . . . . . . . . . . .
8
Symbols Used in Resistance-Coupled
Amplifier Charts.. . . . . . . . . . . . . . . . . . .
Sync Circuits. . . . . . . . . . . . . . . . . . . . . . . . . .
Synchrognide. . . . . . . . . . . . . . . . . . . . . . . . . .
492
39
51
Tables and Charts (see Charts and Tables)
Technical Data for Tube Types. . . . . . . . . .
83
Television Picture TUbes. . . . . . . . . . . . . . . .
10
Television RF Amplifiers ...............
36
39
Television Sync Circuits. . . . . . . . . . . . . . . . .
Testing Electron Tubes. . . . . . . . . . . . . . . .. 487
Tetrode Considerations. . . . . . . . . . . . . . . . .
7
Three-Stage IF Amplifier/Limiter
and Ratio Detector ............. '"
517
Tone-Control Amplifier Stage. . . . . . . . . . .. 528
Tone Control. . . . . . . . . . . . . . . . . . . . . . . . . .
34
Transceivers, Citizens-Band. . . . . . . . . . . . . 512
Transconductance:
conversion. . . . . . . . . . . . . . . . . . . . . . . . .
13
grid-plate. . . . . . . . . . . . . . . . . . . . . . . . . .
13
test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 488
TRF AM Tuner. . . . . . . . . . . . . . . . . . . . . .. 515
Triode Considerations. . . . . . . . . . . . . . . . . . .
6
Tube:
outlines. . . . . . . . . . . . . . . . . . . . . . . . . . . . 500
ratings, interpretation of.. . . . . . . . . . . .
69
tester requirements. .. . . . . . . . . . . . . . .. 489
Tube Types, Technical Data. . . . . . . . . . . . .
83
Tuner:
FM ............................... 516
TRFAM .......................... 515
Tuning Indicators. . . . . . . . . . . . . . . . . . . . . .
49
Twin diode-triode ..................... 9,43
Two-Channel Audio Mixer. . . . . .. ...... 524
Two-Channel Stereophonic Amplifier ... 522, 523
Two-Stage Input Amplifier, CathodeFollower (Low-Impedance) Output. . . . 528
Typical Operation Values,
Interpretation of. . . . . . . . . . . . . . . . . . . .
73
Vertical Output Circuits. . . . . . . . . . . . . . . .
Video Amplifiers. . . . . . . . . . . . . . . . . . . . . . .
Voltage:
amplification, class A. . . . . . . . . . . . . . . .
doubler rectifier. ... . . . . . . . . . . . . . . . . .
peak heater-cathode. . . . . . . . . . . . . . . . .
peak in verse plate. . . . . . . . . . . . . . . . . . .
supply.... ... ......................
Voltage Doubler...... ..................
Volt-Ohm Meter. . . . . . . . . . .
52
37
14
41
71
72
58
41
535
Volume Control:
automatic (AVC) . . . . . . . . . . . . . . . . . . .
by grid-voltage variation.... . . . . . . . . .
by screen-grid-voltage variation.... . . .
delayed automatic (DA VC) . . . . . . . . . .
Volume Compressor and Expander. . . . . . .
46
62
64
47
32
Zero-Bias Operation. . . . . . . . . . . . . . . . . . . .
60
539
RCA Technical Publications
on Electron Tubes, Semiconductor Products, Batteries,
and Test and Measuring Equipment
Copies of the pUblications listed below
may be obtained from your RCA distributor or from .Commercial Engineering, Radio Corporation of America,
Harrison, N. J.
Electron Tubes
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audio circuits and equipment. Written
for the design engineer, student, and experimenter. Contains 1000 illustrations,
2500 references, and cross-referenced index of 7000 entries. Edited by F. Langford-Smith of Amalgamated Wireless
Valve Co., Pty., Ltd. in Australia. Price
$7.00.*
• RCA TRANSMITTING TUBES - TT-5
(8~" x 5%")-320 pages. Gives data
on over 180 power tubes having plate540
input ratings up to 4 kw and on associated
rectifier tubes. Provides basic information on generic types, parts and materials, installation and application, and
interpretation of data. Contains circuit
diagrams for transmitting and industrial
applications. Features lie-flat binding.
Price $1.00.*°
• RCA MAGNETRONS AND TRAVELlNGWAVE TUBES- MT-301A (10Ys" x
8%")-48 pages. Operating theory for
magnetrons and traveling-wave tubes,
application considerations, and techniques for measurement of electrical parameters. Price 60 cents. *0
• RCA INTERCHANGEABILITY DIRECTORY
OF FOREIGN vs. U.S.A. RECEIVING-TYPE
ELECTRON TUBES-ICE-197B (8%" x
10Ys")-8 pages. Covers approximately
800 foreign tube types used principally
in AM and FM radios, TV receivers, and
audio amplifiers. Indicates U.S.A. direct
replacement type or similar type if available. Price 10 cents. *0
• RCA POWER TUBES-PG101E (10Ys"
x 8%")-46 pages. Technical information on 200 RCA vacuum power tubes,
rectifier tubes, thyratrons, and ignitrons.
Includes terminal connections. Price 75
cents. *0
• RCA RECEIVING-TYPE TUBES FOR INDUSTRY AND COMMUNICATIONS- RIT104C (10Ys" x 8%")-44 pages. Technical information on over 190 RCA "special red" tubes, premium tubes, nuvistors, computer tubes, pencil tubes, glowdischarge tubes, small thyratrons, lowmicrophonic amplifier tubes, vacuumgauge tubes, mobile communications
tubes, and other special types. Includes
socket-connection diagrams. Price 35
cents. *0
• RCA RECEIVING TUBES AND PICTURE
TUBES-·1275-K (10%,' x SYs")-64
pages. New booklet contains classification chart, characteristics chart, and
base and envelope connection diagrams
on more than 1050 entertainment receiving tubes and picture tubes. Price 50
cents. *0
• RCA INTERCHANGEABILITY DIRECTORY
OF INDUSTRIAL-TYPE ELECTRON TUBESID-l020D (10%" x SYs") -12 pages.
Lists more than 1600 basic type designations for 20 classes of industrial tube
types; shows the RCA -Direct Replacement Type or the RCA Similar Type,
when available. Price 35 cents. *0
devices, traveling-wave tubes, pencil
tubes, integral-cavity pencil tubes, magnetrons, and solenoids for travelingwave tubes. Single copy free on request.
• RCA PENCIL TUBES-1CE-219 (lOW' x
8Ys")-2S pages. Contains operating
theory for pencil tubes, electrical and
mechanical circuit-design considerations, environmental considerations, application considerations, and data for
commercial types. Price 50 cents. *0
.RCA PHOSPHORS-TPM-150SA (lOW'
x 8Ys")-20 pages. Contains defining
data for over 25 different industrial
phosphors, spectral-energy emission
curves, persistence curves, and quickreference classification charts. Price 75
cents.*o
• RCA NUVISTOR TUBES FOR INDUSTRIAL
AND MILITARY APPLICATIONS - 1CE280 (lOys" x SYs")-16 pages. Describes
unique features of nuvistors and includes
tabular data, dimensional outlines,
curves, terminal diagrams, and socket
information. Price 25 cents. *0
• TECHNICAL BULLETINS-Authorized
information on RCA transmitting tubes
and other tubes for communications and
industry. Be sure to mention tube-type
bulletin desired. Single copy on any type
free on request.
• RCA PHOTO AND IMAGE TUBESlCE-269 (lOys" x SYs")-32 pages. Includes concise data on RCA multiplier
phototubes, gas and vacuum photodiodes, and image-converter tubes. Features recommended multiplier phototub~ and image-converter tubes and
quick selection charts for phototubes.
Includes response curves for photo and
image tubes, sockets and shields for
phototubes, and dimensional outlines
for photo and image tubes. Price 60
cents. *0
• TV SERVICING. Bulletin TVa-l030
(10ys" x SYs")-48 pages. Contains articles on TV trouble shooting, TV tuner
alignment, and TV circuit analysis by
RCA's expert in the field of TV servicing
and test equipment-John R. Meagher.
Price 35 cents. *0
• TV SERVICING, SUPPLEMENT 1. Bulletin TVa-l03l (10%" x. 8Ys")-12page booklet by John R. Meagher on
solving trouble shooting problems in
those hard-to-service television receivers known to service technicians as
"'.-,ugh" sets or "dogs." Price 15 cents. *0
• RCA STORAGE AND CATHODE-RAY
TUBES-lCE-270 (10%" x 8Ys Ii )-12
pages. Includes technical data on RCA
Semiconductor Products
display-storage tubes, computer-storage
•
RCA SEMICONDUCTOR PRODUCTS
tubes, scan-converters, radechons, oscillograph-type cathode-ray tubes, and HANDBOOK-HB-10. Two binders, each
special-purpose kinescopes including 7Ys" L x 5%" W x 2%" D, having goldmonoscopes, transcriber types, monitor imprinted red covers. Contains over
types, flying-spot types, projection 1000 pages of loose-leaf data and curves
types, and view-finder types. Gives on RCA semiconductor devices such as
latest JEDEC "Kelley Chart" and de- transistors, silicon rectifiers, silicon conscriptive material on the characteristics trolled rectifiers, tunnel diodes, and tunof phosphors used in RCA industrial nel rectifiers. Available on subscription
basis. Price $10.00* including service for
tubes. Price 20 cents. *0
first year. Also available with RCA Elec• RCA MICROWAVE TUBES AND PACK- tron Tube Handbook HB-3 at special
AGED SOLlD- STATE DEVICES - lCE- combination price of $25.00*. Write to
l80E (lOys" x 8Ys")-16 pages. In- Commercial Engineering for descriptive
cludes technical data on RCA solid-state flyer and order form.
541
• RCA TRANSISTOR MANUAL- SC-lO
(8%" x 5%")-304 pages. Contains detailed technical data on RCA semiconductor devices. Easy-to-read text includes information on basic theory, application, and installation of transistors,
silicon rectifiers, and semiconductor diodes. Includes circuit diagrams and
parts lists for many typical applications.
Features lie-flat binding. Price $1.50.*°
• RCA TUNNEL DIODE MANUAL- TD30 (8%" x 5%")-160 pages. Describes
the microwave and switching capabilities of tunnel diodes. Contains information on theory and characteristics, and
on tunnel-diode applications in switching circuits and in microwave oscillator,
converter, and amplifier circuits. Includes data for over 40 RCA germanium
and gallium arsenide tunnel diodes and
tunnel rectifiers. Price $1.50. *0
• RCA SEMICONDUCTOR PRODUCTS
GUIDE-60-S-l6R5 (l0Ys" x 8%")-12
pages. Contains application guide, index, and ratings and characteristics arranged for easy access to RCA's entire
line of semiconductor products, as well
as digital microcircuits, memory products, and photocells. Single copy free on
request.
• RCA TRANSISTOR REPLACEMENT GUIDE
-lLlll5 (lOYs" x 8%")-36 pages.
Contains RCA transistor and rectifier
replacement data for more than 1000
portable radio receivers, table radio receivers, tape recorders, and portable
equipment of 145 manufacturers. Price
35 cents.*o
• RCA SILICON RECTIFIER INTERCHANGEABIlITY DIRECTORY -lCE-229A (lOYs"
x 8%")-16 pages. Contains replacement information, ratings, characteristics, and physical dimensions for more
than 400 silicon and selenium rectifiers.
Price 25 cents. *0
• TRANSISTORIZED VOLTAGE REGULATORS APPLICATION GUIDE-lCE-254
(lOYs" x 8%")-12 pages. Discusses
transistorized voltage regulators of the
series and shunt types. Included are design considerations, step-by-step design
procedures, and the solutions to sample
design problems. An appendix contains
the derivation of design equations. Price
542
25 cents. *0
• RCA SILICON POWER TRANSISTORS
APPLICATION GUIDE-lCE-215 (lOW'
x 8%")-28 pages. Describes outstanding features of RCA silicon power transistors and their use in many critical industrial and military applications. Includes construction details, discussion
of voltage ratings, thermal stability conditions, and equivalent circuits for these
transistors. Price 50 cents. *0
• RCA SILICON VHF TRANSISTORS APPLICATION GUIDE-lCE-228 (lOW' x
8%")-20 pages. Describes unique capabilities of RCA silicon vhf transistors
and their use in critical industrial and
military applications up to 300 Mc.
Price 50 cents. *0
• TECHNICAL BULLETINS - Authorized
information on RCA semiconductor
products. Be sure to mention type-number bulletin desired. Single copy on any
type free on request.
Batteries
• RCA BATTERIES-BAT-134F (lOW' x
8%")-24 pages. Technical data on 113
Leclanche, alkaline, and mercury-type
dry batteries, for radios, industrial applications, flashlights, lanterns, electronic toys, and for photoflash service.
Price 35 cents. *0
• RCA BATTERY MANUAL-BDG-lll
(lOYs" x 8%")-64 pages. Contains information for the designer, application
engineer, experimenter, and student on
dry cells and batteries: carbon zinc
(Leclanche), mercury, and alkaline types.
Includes battery theory and applications, detailed electrical and mechanical
characteristics, a classification chart, dimensional outlines, and terminal connections for each battery type. Price 50
cents. *0
• RCA ALKALINE BATTERIES -lCE-237
(lOYs" x 8%")-2 pages. Contains technical data, curves, and dimensional outlines for 4 alkaline batteries in applications having a wide range of currentdrain requirements. No recovery period
required; batteries have exceptionally
long shelf life. Single copy free on request.
Test and Measuring
Equipment
INSTRUCTION BOOKLETS - Illustrated
instruction booklets, containing specifications, operating and maintenance data,
application information, schematic diagrams, and replacement parts lists, are
available for all RCA test instruments.
Booklets for the following popular instruments are available at the prices indicated. Prices for booklets on other instruments are available on request.
W A-44A (Audio Signal
Generator) .......... $0.50·
WA-44C (Audio Oscillator) . . . .. 1.00*
WE-93A (Transistor Radio
Dynamic Demonstrator
Kit)' ................ 0.25*
viVE-95A (VOM Dynamic Demonstrator Kit) ....... 0.10·
WO-33A (Super-Portable
Oscilloscope) . . . . . . .. 1.00·
WO-88A (5-in. Oscilloscope). . .. 0.50*
WO-91A (5-in. Oscilloscope). . .. 1.00*
WR-36A (Dot-Bar Generator).. 0.50*
WR-46A (Video Dot/Crosshatch
Generator) .......... 0.75*
WR-49A (RF Signal Generator) 0.50·
WR-49B (RF Signal Generator) 1.00·
WR-50A (RF Signal Generator) 1. 00·
WR-51A (Stereo FM Signal
Simulator) .......... 1. 00*
WR-61B (Color-Bar Generator) 1.00*
WR-64A (Color-Bar/Dot/
Crosshatch Generator) 1.00·
WR-67A (Test-Oscillator) ...... 0.25*
WR-69A (TV-FM Sweep
Generator) .......... 1.00·
WR-70A (RF-IF-VF Marker
Adder) ..............
WR-86A (UHF Sweep
Generator. . . . . . . . . ..
WR-99A (Marker Calibrator) ..
WV-37B (Radio Battery Tester)
WV-38A (Volt-OhmMilliammeter) .......
WV-65A (VoltOhmystt) ......
WV-74A (High-Sensitivity
AC VTVM). . . . . . . ..
WV-75A (VoltOhmystt) .......
WV-76A (AC VTVM) ........
WV-77A (VoltOhmystt) .......
WV-77B (VoltOhmystt) .......
WV-77E (VoltOhmystt) .......
WV-84C (ffitra-Sensitive
DC Microammeter) ..
WV-95A (VoltOhmystt).. . . . ..
WV-97A (VoltOhmystt) .......
WV-98B (Senior VoltOhmystt).
WV-98C (Senior VoltOhmystt).
195-A
(VoltOhmystt) ......
WT-100A (Electron-Tube
MicroMhoMeter, Ser.
No. 1001 and over) ..
WT-100A (Tube Chart ICE
-163) ..............
WT-llOA (Automatic ElectronTube Tester) . . . . . . ..
WT-llOA (ICE-174 Card
Punch Data) ........
WT-llOA (lCE-234 Card
Punch Data) . . . . . . ..
0.75*
O. 50·
1.00*
0.25*
0.50*
0.25*
0.75*
0.25*
0.75*
0.25*
0.25*
1.00*
0.75*
0.25*
0.50*
1.00*
0.50*
0.25*
2.00*
3.00·
1.00*
0.25*
1. 00*
tTrade Mark Reg. U.S. Pat. Off.
·Prices shown apply in U.S.A. and are subject to
change witbout notice.
'Optional List Price.
543
Reading List
This list includes references of both elementary and advanced character.
Obviously, the list is not inclusive, but it will guide the reader to other references.
ALBERT, A. L. Electrons and Electron Devices, The MacMillan ,Co.
BECK, A. H. W. Thermionic Valves, Cambridge University Press.
CHUTE, G. M. Electronics in Industry. McGraw-Hill Book Co., Inc.
DOME, R. B. Television Principles. McGraw-Hill Book Co., Inc.
Dow, W. G. Fundamentals of Engineering Electronics. John Wiley and Sons, Inc.
EASTMAN, A. V. Fundamentals of Vacuum Tubes. McGraw-Hill Book Co., Inc.
EDSON, W. A. Vacuum Tube Oscillators, John Wiley and Sons, Inc.
FINK, D. G. Television Engineering. McGraw-Hill Book Co., Inc.
GHIRARDI, A. A. Radio and Television Receiver Circuitry and Operation. Rinehart
and Co., Inc.
GRAY, T. S. Applied Electronics. John Wiley and Sons, Inc.
GROB, B. Basic Television. McGraw-Hill Book Co., Inc.
HENNEY, KEITH. Radio Engineering Handbook. McGraw-Hill Book Co., Inc.
HOAG, J. B. Basic Radio. D. Van Nostrand Co., Inc.
KOLLER, L. R. Physics of Electron Tubes. McGraw-Hill Book Co., Inc.
MAEDEL, G. F. Basic Mathematics for Television and Radio. Prentice-Hall, Inc.
MARCUS, A. Elements of Radio. Prentice-Hall, Inc.
MARKUS AND ZELUFF. Handbook of Industrial Electronic Circuits. McGraw-Hill
Book Co., Inc.
MILLMAN AND SEELY. Electronics. McGraw-Hill Book Co., Inc.
MOYER AND WOSTREL. Radio Receiving and Television Tubes. McGraw-Hill Book
Co., Inc.
PENDER, DELMAR, AND McILWAIN. Handbook for Electrical Engineers-Communications and Electronics. John Wiley and Sons, Inc.
PREISMAN, A. Graphical Constructions for Vacuum Tube Circuits. McGraw-Hill
Book Co., Inc.
HICKEY, H. V., and VILLINES, JR., W. M. Elements of Electronics. McGraw-Hill
Book Co., Inc.
RCA TECHNICAL BOOK SERIES. Electron Tubes, Vol. I and Vol. II. RCA Review.
REICH, H. J. Theory and Applications of Electron Tubes. McGraw-Hill Book
Co., Inc.
RICHTER, WALTHER. Fundamentals of Industrial Electronic Circuits. McGraw-Hill
Book Co., Inc.
SEELY, S. Electron Tube Circuits. McGraw-Hill Book Co., Inc.
SPANGENBERG, K. R. Vacuum Tubes. McGraw-Hill Book Co., Inc.
STURLEY, K. R. Radio Receiver Design. Chapman and Hall, Ltd.
TERMAN, F. E. Fundamentals of Radio. McGraw-Hill Book Co., Inc.
TERMAN, F. E. Radio Engineers H~ndbook. McGraw-Hill Book Co., Inc.
The Radio Amateurs Handbook. Am~rican Radio Relay,League.
ZWORYKIN AND MORTON. Televjsion: The Electronics of Image Transmission. John
Wiley and Sons, Inc.
544
KEY: BASING DIAGRAMS (Bottom Views)
•BC
BS
C
CL
DJ
ES
F
F+
Gas-Type Tube
Base Sleeve
Base Shell
External Conductive Coating
Collector
Deflecting Electrode
External Shield
Filament
Filament
(positive only)
FFM
G
H
HL
HM
IC
IS
K
Filament
(negative only)
Filament Tap
Grid
Heater
Heater Tap for
Panel Lamp
Heater Tap
Do Not Use
Internal Shield
Cathode
LC
NC
P
RC
S
TA
Do Not Use,
Except As
Specified in
Data
No Internal
Connection -May Be Used
As Tie Point
Plate (Anode)
Ray-Control
Electrode
Shell
Target
Subscripts for multi-unit types: B, beam unit; D, diode unit; HP, heptode unit; HX,
hexode unit; P, pentode unit; T, triode unit; TR, tetrode unit.
Many tube types are available in addition to the home-entertainment types
described in this manual. For industrial and specialized applications, other
small receiving-type tubes are available, such as nuvistor tubes, "premium"
tubes. thyratrons, cold-cathode (glow-discharge) tubes, computer tubes, tubes
for mobile communications applications, and Special Red tubes. Other lines
of RCA electron devices include:
POWER TUBES
Transmitting and
Industrial Types
TELEVISION CAMERA TUBES
Image Orthicons,
Vidicons, and
Monoscopes
PHOTOTUBES
Single-Unit, Twin-Unit,
and Multiplier Types
PHOTOCELLS
Photoconductive and
Photojunction Types
THYRATRONS and IGNITRONS
For sales information,
write to Sales
MICROWAVE TUBES
Magnetrons, Traveling-Wave
Tubes, Pencil Tubes
CATHODE-RAY TUBES
Special-Purpose Kinescopes,
Storage Tubes, and
Oscillograph Types
SPECIAL TYPES
Vacuum Gauge Tubes,
I mage Converters
SEMICONDUCTOR DEVICES
Germanium and Silicon
Transistors, Silicon Rectifiers,
Tunnel Diodes, Microelectronics,
Memory Devices
For technical information, write
to Commercial Engineering
RADIO CORPORATION OF AMERICA
ELECTRONIC COMPONENTS AND DEVICES
HARRISON,
N. J.
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