094 903286B_Hallicrafters_SR 150_Operating_And_Service_Instructions_May63 903286B Hallicrafters SR 150 Operating And Service Instructions May63

User Manual: 094-903286B_Hallicrafters_SR-150_Operating_And_Service_Instructions_May63

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hallicraliers

OPERATING AND SERVICE INSTRUCTIONS

COMMUNICATIONS
TRANSCEIVER
MODEL SR-1SO

IMPORTANT
BEFORE OPERATING THE SR-1S0 REFER TO PAGE 16 OF THIS
MANUAL, PARAGRAPH 8-3 (BIAS ADJUSTMENT). THE BIAS ADJUSTMENT ON THE POWER SUPPLY MUST BE SET PROPERLY TO PREVENT PERMANENT DAMAGE TO THE FINAL AMPLIFIER TUBES AND
FOR OPTIMUM PERFORMANCE OF THIS EQUIPMENT.

"Th e Hallicrafter's Company u;arrants each neu; radio product manufa ctured by it to be fr ce. from defective material and u;orkmanship
and agrees to re medy allY SIIeI. de fect or to fllTllish a neu; part in exchange for any part of any unit of its manllfacture u;hich under normal installation, use and service discloses such d efcct, provided the
unit is d eli vcred by the ou;ner to Oll r auth orized radio d ealer, u;holesaler, fr om u;/lOm pllrchased , or, auth orized service center, ill tact , for
examination, u;ith all tran s/JO rtation charges pre paid u;ithin ninety
days from the dat e of sale to original /,urchaser and provided that
such examination discloses in Ollr ;udgment that it is thus d efective.
This u;arranty does not extend to any of our radio products u;hich
have been sub;ected to misuse, neglect, accident, incorrect u;irin g not
our ou;n, improper instal/at ion, or to use in violation of instructions
furnish ed by us, nor exte nded to units u;hich have been re paired or
altered outside of our factory or authorized scrt;ice center, nor to cases
u;he re the serial number thereof has bee n removed , defa ced or changed ,
not to accessories used thereu;ith not of our own manufacture.
Any part of a unit approved for rem edy or exchange hereunder u;i1/
be rem edied or exchanged by the auth orized radio dealer or u;holesaler u;ithout charge to the ou;ner.
This u;arranty is in lieu of all other u;arranties expressed or implied
and no re presentative or person is aut/lOrized to assum e for "" allY
other liability in connection u;ith th e sale of our radio produ cts:'

pliXff} hallicraliers CS@o

092·017851

Figure I. Hol/icroffers Model SR· 150 Transceiver.

SECTION I
GENERAL DESCRIPTION
The Hallicrafters Model ,SR-150 Transceiver is
a precision-built, compact, high-performance
radio equipment of advanced design. This transceiver utilizes 19 tubes and a dual conversion
IF to provide for the transmission and reception
of single-sideband (SSB) and continuous wave
(CW) signals on the 80, 40 , 20, 15, and 10 meter
bands.

Another special feature is the amplified Automatic
Audio Level Control (AALC) which functions in
the transmit mode. The AALC circuitry prevents
splatter due to severe flat-topping of the final
amplifier by providing about 15 DB of compression after a small amount of flat-topping occurs.
Other features of the Model SR-150 Transceiver
include:

The versatility of SR-150 equipment permits it
to be operated as a fixed station or as a mobile
equipment. A 117-volt, 50/ 60-cycle, AC power
supply, complete with speaker (Model PS-150120) , is available for fixed-station use; a 12-volt
DC power supply, Model PS-150-12, and amobile
mounting rack (Model MR-150) are available
when the transceiver is to be used in a mobile
configuration.

• A stable, accurately-calibrated VFO.
• A built-in, 100-KC crystal calibrator.
• Upper and lower sideband, MaX, (push-totalk), VOX, Manual CW, and break-in CW
operation.
• A crystal-lattice filter.
• A product detector.

An advanced feature of the SR-150 equipment
is the Receiver Incremental Tuning (RIT) control. This control enables the operator to unlock
the receiver frequency and tune the receiver
apprOXimately two KC either side of the transmitter frequency. Flipping the RIT switch OFF
automatically returns the equipment to the transceiver condition.

• An S-meter / RF output level indicator.
IMPORTANT

Do not, under any circumstance, attempt
to operate the SR-150 equipment before
becoming completely familiar with the instructions contained within this manual.
·1·

SECTION II
TECHNICAL DATA

TUBES AND FUNCTIONS

Vl1

6T8A

Receiver First Audio, AGC Detector, VOX
Diode, and QT Diode.

V12

OA2

Voltage Regulator.

VB

6AQ5A

Receiver Audio Output.

VI

6AZ8

Receiver RF Amplifier and Calibrate Oscillator.

V2

12BA7

Receiver and Transmitter First Mixer

V3

6EA8

6.0-MC to 6.5-MC IF Amplifier and Audio
Cathode Follower.
Receiver Second Mixer.

V14

12BA7

V4

6EA8

V5

Receiver Second !650·KC IF Amplifier and
AALC Amplifier.

V6

12BE6

Product Detector.

V7

6AH6

Transmitter Second Mixer.

12DQ6B/

12GW6
V15

Power Amplifier.

12DQ6B/

12GW6

Power Amplifier.

V16

12BY7A

Transmitter Driver.

V17

6EA8

Receiver and Transmitter 1650-KC IF Amplifier
and Meter Amplifier.

V8

12AT7

Heterodyne Oscillator and Cathode Follower.

V9

6EA8

VFO and Cathode Follower.

V18

12AX7

First and Second Microphone Amplifier.

Vl0

12AT7

Carrier Oscillator/BFO.

V19

12AT7

VOX Amplifier and VOX Relay Amplifier.

FREQUENCY COVERAGE:

Ambient Temperature Range -

Eight-band capability - Full coverage provided
for 80, 40, 20, 15, and one segment of the 10meter band. Provisions made and crystals
available for the remaining three segments of
the 10-meter band. Other frequencies are available on request.

Construction -

Rugged, lightweight aluminum.

Dimensions (HWD) - 6-1/2 by 15 by 13 inches.
Net Weight - 17-1/2 pounds.
Shipping Weight - 22 pounds (approx).

OPERATION:

TRANSMITTER:

Single Sideband - VOX or MOX (push-to-talk).

Output Tubes - Two 12DQ6B tubes in parallel.

CW - Manual or break-in.

Output Impedance - Fixed, 50-ohm pi-network.

FRONT PANEL CONTROLS:

Power Input - SSB . . . . 150 watts PEP MAX.
CWo . . . . 125 watts MAX.

Tuning;
Band Selector;
Final Tuning; RF
Level - Mic Gain; Preselector; RIT; RF
Gain - AF Gain; Operation (Off/Standby/MOX/
VOX); Function (CW/USB/LSB); Cal; Cal Adj.

Carrier and Unwanted
Sideband Suppression - 50 DB.
Distortion Products - 30 DB.

GENERAL:
Dial Calibration -

Minus 20° to
plus 50°C.

Audio Response - 600 CP S to 2800 CP S @ 3 DB.
5-KC increments (Built-in,
100-KC crystal calibrator).

Microphone Input - High impedance.
RECEIVER:

Calibration Accuracy - Less than 2 KCbetween
100- KC points after indexing.

Sensitivity - 1 microvolt for a 20-DB signal-tonoise ratio.

VFO - 500-KC tunable range.

Audio Output - 2 watts.

stability - Less than 300 CPS after warmup.

Output Impedance -

Tubes -

Overall Gain -1 microvolt for 1/2 watt output.

18 plus one voltage regulator, ten
diodes, and one varicap.

3.2 ohms and 500 ohms.

Antenna Input""::" 50 ohms.
- 2-

Input Power Requirements:

IF - Dual Conversion:

Transmit (CW) . . . . 19 amperes.
Receive . . . . . . . . . 14 amperes.

First IF . . . . 6.0 MC to 6.5 MC variable
(tunes with the VFO).
Second IF ... 1650 KC, crystal-lattice filter.
Heterodyning Crystals -

Dimensions (HWD) - 3-3/4 by10 by6-3/4 inches.

Type CR-23/U, third
overtone, series resonant.

Net Weight - 5-1/2 pounds.
Shipping Weight - 9 pounds (approx).
117-volt AC Power Supply Model PS-150-120 Styled as a companion unit to the Model SR-150
Transceiver, this supply also contains a 4-inch
by 6-inch speaker ... one-cable connection carries
power to, and audio from, the transceiver .. may
be plugged into any 115-voltwall outlet.. contains
five silicon diode rectifiers.

ACCESSORIES:
Mobile Mounting Rack Model MR-150 - Quick
release design adaptable to transmission hump
or floor mount ... all connections made simultaneously ... access holes for VOX controls.
Net Weight - 10 pounds.
Shipping Weight -

Input Power Requirements:

12-3/4 pounds (approx).

Transmit (CW) . . . . 290 watts.
Receiver . . . . . . . . 150 watts.

12-volt DC Power Supply Model PS-150-12
Designed for out-of-the-way trunk installation ...
terminal strip provides for quick-and-easy
connection to the cable from the mounting
rack ... contains five silicon diode rectifiers
and four transistors.

Dimensions (HWD) - 6-1/4 by7-1/2 byl0 inches.
Net Weight - 22 pounds.
Shipping Weight - 28-1/2 pounds (approx).

SECTION III
INSTALLATION
be in the down (common) position and the antenna
connected to the bottom connector. If separate
antennas are used, the switch should be up, the
receiver antenna should be connected to the top
connector (Jl), and the transmitter antenna connected to the bottom connector (J2).

WARNING

LETHAL HIGH VOLTAGE IS PRESENT
WITHIN THIS EQUIPMENT. BE CAREFUL WHEN INSTALLING THE UNIT,
WHEN MAKING BIAS ADJUSTMENTS,
AND
WHEN PERFORMING CHECKS
UNDER THE CHASSIS.

Figure 3 shows an installation, in block diagram form, making use of a linear amplifier and
an external antenna changeover relay. Connections
to the power supply from the antenna changeover
relay are internal solder connections. Refer to
figures 14, 15, 17, and 18 for the internal chassis
views and schematic diagrams of the power supplies used in conjunction with the Model b'R-150
Transceiver. In the installation Shown, the receiver is connected directly to the relay through
the top antenna connector (Jl); the transmitter is
connected through the bottom antenna connector
(J2) to the linear amplifier which, in turn. is connected to the relay. If desired, two separate antennas may be used in the installation shown, eliminating the use of the antenna changeover relay.

3·1. UNPACKING.

Carefully remove this equipment from its
carton and packing material and examine it for
any possible damage which may have occurred
during transit. Should any sign of damage be apparent, immediately file a claim with the carrier
stating the extent of the damage. Check all shipping labels and tags for special instructions before
removing or destroying them.
3·2. LOCATION.

The Model SR-150 Transceiver maybeplaced
in any location permitting free air circulation
through the ventilation openings in the cabinet.
However, excessively warm locations such as
those adjacent to. radiators and heating units
should be avoided.

NOTE

Never operate the transceiver without
making a connection to a proper antenna
or to a resistive dummy load.

3·3. ANTENNAS.

Antenna connections are provided on the rear
of the transceiver, as shown in figure 2. If a common antenna is used, the antenna switch (S2) should
·3·

Refer to the ARRL handbook or similar publications for the selection and installation of
antennas.

52

JI

J4

J7

J2

J5
092-017850

Figure 2. Rear View of Transceiver.

3-4. MOBILE INSTALLATION.

The Model SR-150 Transceiver may be installed in any vehicle having a 12-volt DC power
source. To complete this mobile installation, a
Model PS-150-12 Power Supply and a Model
MR-150 Mobile Mounting Rack will be required.
The PS-150-12 Power Supply, as shipped, is wired
for vehicles having the negative side ofthe battery
grounded_ If this equipment is to be installed in
vehicles having the positive side grounded, make
the wiring change noted in figure 18, schematic
diagram of the Model PS-150-12 Power Supply.

Set the mounting rack on a work bench
with the rear of the rack on the bench and
the side panels open. Make sure the four
nuts securing the power and antenna connectors have been loosened.

2.

Holding the transceiver with the front
panel up, very carefully slide the transceiver into the rack until the power and
antenna connectors mate with those in the
mounting rack.

4.

Carefully remove the transceiver from
the mounting rack and proceed with the
installation.

The SR-150 Transceiver may be installed at
this time if desired. Before installing the transceiver in the mounting rack, ascertain that the
antenna switch on the rear panel is in the down
(common) position. Slide the transceiver back into
the MR-150 Mounting Rack so that a good connection is made to the power and antenna receptacles
on the rear inside of the mounting rack. Secure the
units together by means of the wing screws on both
sides of the mounting rack.
The Model PS-150-12 Power Supply may be
installed in any convenient location. In the installation discussed in this book, the power supply will
be installed in the trunk '(see figure 5). Mount the
power supply securely, using self-tapping screws.
Position the power supply in such a manner that
the side with the terminal strips is accessible.

IMPORTANT

Extreme care must be exercised inperforming this step to prevent damaging the
connectors on the transceiver and in the
mounting rack.

With the transceiver securely in position,
turn the equipment on its side and tighten
the four nuts holding the connectors in the
mounting rack in place.

A base bracket and mounting straps are provided for installing the Model MR-150 Mounting
Rack under the dashboard or on the transmission
hump (see figure 4). When selecting a location for
installing the mounting rack, an open area should
be allowed on the top or bottom to provide adequate
ventilation for the transceiver when it is inplace.

Before installing the equipment, it is necessary to set the position of the connectors in the
rear of the mounting rack. This may be accomplished as follows:
1.

3.

-4-

LINEAR

AMPlIFIE.R

IN
, - - --0

OUT

POWER
SUPPLY
PS-150-120

ANTENNA ~
SWITCH
(UP)

D

L..o

A

\[7
EXTERNAL
ANTENNA RELAY

SR - I 50
TRANSCEIVER

b

TRANSMIT

RECEIVE
POWER
SOCKET
(MALE)

I -0

.... I
I

I

!O PIN

II

(?
TO EXTERNAL
117 V-GO CPS

II

PIN 10

POWER
PLUG
(FEMALE)

)

092·017686B

Figure 3. Base InstalIation, Using a Linear Amplifier.

Connect the speaker to the jack provided on
the side of the mounting rack. This jack accepts
a standard PL55 type plug.

Run the cable from the mounting rack under the
floor mat and under the rear seat into the trunk.
Since this cable is weatherproof, it may be
threaded underneath the vehicle if desired. Cut the
cable to the desired length, strip the wires, and
connect these wires to the terminal strip on the
power supply (see figures 5 and 17 for color coding
and terminal numbering).

Use of the auto radio loud speaker is not
recommended unless a switch is installed to
remove the speaker from the auto radio when
operating the SR-150.

IMPORTANT

Install the antenna in the manner recommended by the antenna manufacturer. Connect the
coaxial cable from the antenna, through the hole
in the right side of the mounting rack, and solder
to the rear of the phono-pin-plug type connector
in the rear of the mounting jack. Use care when
soldering. Solder on the outside of the center pin
must be removed to prevent possible damage to
the female antenna connector in the transceiver.
If desired, prior to installing the mounting rack,
a length of coaxial cable may be connected from
this phono-pin-plug type connector to a coaxial
connector attached to the right side of the mounting rack in the space provided. If this is done,
when the antenna is installed, it may be attached
to the connector using a mating connector.

Before connecting to the vehicle's battery, check the transceiver, if already
installed, to ascertain that the OP ERATION switch is in the OFF position.
Connect the two NO. 8 AWG wires supplied
between the two-connector terminal strip on the
power supply and the battery. The red/white wire
should be connected from the top terminal on the
power supply to the positive (+) side of the battery
and the red/black wire from the bottom terminal
to the negative (-) side ofthe battery. These wires
should be cut to a suitable length before being connected to the battery. The positive lead should be
connected to the battery through a 30-ampere fuse
block (not supplied, see figure 5). If the vehicle has
a positive ground electrical system, fuse the negative lead.

Connect a suitable microphone to the jack
provided on the front panel. It is important that
the internal wiring of the microphone be as
shown in figure 6.

CAUTION

USE CARE WHEN MAKING CONNECTIONS TO THE BATTERY IN THE
VEHICLE. THE POWER IN ABATTERY
CAN CAUSE DANGEROUS BURNS AND
EVEN
EXPLOSION
IF
SHORT
CIRCUITED.

IMPORTANT

·5-

Before proceeding, refer to alignment
procedure, paragraph 8-3, for bias
adjustment.

1111111111111111111111111111111111111111111111111t- DASH

BOARD

~--

,
\

----

---",\\~\ \ \ \ \ \ \ \\\\\
0 0 0
\

\

\

,

\

,

,----).
\

I'

\

\

\
TRANSMISSION HUMP

092·019687

Figure 4. Installing the Moclel MR·150 Mounting Rack.

Hallicrafters has available a Mobile NoiseSuppression Kit, Model HA-3, which will fulfill
any suppression requirements of this installation.

Only after familiarizing yourself with the
controls and their functions, as outlined in
Sections IV and V, should you perform an operational check. It is recommended that the engine be
running while operating the Model SR-150 Transceiver to prevent drainingpower from the battery.

Additional information, concerning the proper
suppression of mobile noise, is available in the
Handbook of Instructions for Hallicrafters' Model
HA-3 Mobile Noise Suppression Kit and in other
current handbooks on the same subject.

3·5. MOBILE NOISE SUPPRESSION.
The following suggestions may be helpful in
the suppression of noise encountered in mobile
operation. Install resistor-type spark plugs and
coaxial bypass capacitors in the ignition coil,
generator, and voltage regulator leads. Install
bracket-mounted coaxial capacitors in the generator and battery leads to the voltage regulator and
connect a 0.005 microfarad mica or disc capacitor
from the generator lead to ground. Chokes maybe
used in the generator field and armature leads
instead of the bypass capacitors - approximately
12 turns of NO. 18 wire on a 1/4-inch powdered
iron core for the field lead choke and approximately 12 turns of NO. 12 or NO. 14 wire on a
1/4-inch powdered iron core for the armature
lead choke.

3·6. BASE INSTALLATION.

The Model SR-150 Transceiver, as a base
station, may be used with or without a linear
amplifier. To operate from 117 volts AC, the
Model PS-150-120 Power Supply, or an equivalent,
is required. Merely connect the power plug from
the power supply to the receptacle on the rear of
the transceiver, connect the AC cord from the
power supply to the wall outlet, and connect to an
antenna installation as described in paragraph 3-3.
A four by six inch speaker is contained in the
power supply and is interconnected to the transceiver through the power plug.
·6·

2

RED #18; 250V
@175 MA
WHITE #18; NEGATIVE
BIAS
BLACK/WHITE #18;
SWITCHING

BROWN #12; HEATERS
BLACK #12; GROUND
ORANGE # 18; SPARE

PS-150 -12
POWER SUPPLY

m
"

I

TO POSITIVE POST
OF BATTERY

30 AMP FUSE

TO TOP (+)
TERMIN,AL ON
POWER SUPPLY

Figure 5. Wiring Diagram 01 Mobile Installation.

IMPORTANT

r - - - -. -

Before operating the SR-150, the bias
adjustment control on the power supply
must be set. See paragraph 8-3 of the
alignment procedure.

I
I

I
I
PLUG

I

MICROPHONE

L_

- - -

If a linear amplifier and an antenna changeover relay are used, the cap on the plug of the
power supply cable must be loosened, enabling
wires to be soldered to pins 10 and 11 of the plug
(see figure 3), thus providing a control circuit for
the relay.
..
.

I
-.J

089·003330

Figure 6. Required Microphone Wiring.,

SECTION IV
FUNCTION OF OPERATING CONTROLS
All controls utilized during normal operation of Hallicrafters Model SR;;.150
Transceiver are located' on the front
panel (see figure 7). .

shafts. The ON/OFF function of the lever control
either puts the variable-element RIT control in or
out of operation. This control, in the ON position ,
enables the operator to fine-tune the receiver plus
or minus two KC by means of the RIT potentiometer (round knob) without disturbing the.initial
calibration or tr.an~mitting frequency. Returning
the control to the OFF position locks Ule receiver
frequency to the transmitter frequency.

4-1. RIT CONTROL - ON/OFF.
,

:

.'

The Receiver Incremen.tal
. Tuning (RIT) ·con. .
trol is made up of two controls;with concentI:~c
-7-

092-0 17 8 49

Figure 7. Front Panel View of Transceiver .

4-2. RF GAIN - AF GAIN.

4-4. MIC JACK.

The RF GAIN and AF GAIN controls are two
controls mounted on concentric shafts. The RF
GAIN control (lever contr-ol) varies the gain of the
receiver RF amplifier and mixer. Maximum sensitivity is obtained with the control set at 10
(fully clockwise).

The MIC jack provides for the connection of
a push-to-talk microphone for use in MOXtransmission. Thepush-to-talk switch is bypassed when
transmitting in the VOX mode.
4-5. FUNCTION.

The FUNCTION control is a three-position
switch. This switch is used to select the mode of
operation: CW, LSB, or USB.

The AF GAIN control (round knob) adjusts the
the audio output level at the speaker terminals and
PHONES jack. Clockwise rotation increases the
signal applied to the grid of the audio amplifier,
thus increasing the audio output.

4-6. CALIBRATION ADJUSTMENT (CAL ADJ) .

The CAL ADJ control varies the frequency of
the Variable Frequency Oscillator (VFO) over a
small range so that its frequency can be set
precisely when compared to a standard.

4-3. OPERATION.

The OPERATION control is a four-position
switch. In the OFF pOSition, all power is disconnected from the circuitry. In the STBY position,
the receiver portion of the unit is in operation
and all circuits common to both receiver and
transmitter are in the receive condition. In this
position, those functions used only in the transmit
mode are biased off. In the MOX (push-to-talk)
, position, the transmitter portion of the unit is in
operation and all circuits common to both transmitter and receiver are in the transmit condition.
In this pOSition, those circuits used only in the
receive mode are automatically biased off when
the transmitter is keyed (microphone button
depressed). In the VOX position, the transmitter
is energized by voice or part of the first character of a CW transmission. In the absence of
voice or keying, the unit is automatically placed
in the receive mode. This portion can also be
referred to as Automatic.

4-7. TUNING (VFO).

The TUNING control tunes in the frequency
to which you are listening. This control is connected to the tuning dial which presents a visual
indication of the frequency in the left-hand window
on the panel. As an added feature, the position of
this knob may be adjusted by using the bristol
wrench supplied. Loosen the two set screws and
position the TUNING knob on the shaft against the
felt pad for the desired amount of dragor torque.
4-8. OFF-CALI BRA TE (CAL).

-8-

The OFF-CAL control is a two-position
switch used to turn the crystal calibrator off or on.
When in the CAL or on position, it provides standard frequencies at 100-KC intervals to accurately
calibrate the VFO.

4-12. RF LEVEL-MIC GAIN

4-9. BAND SELECTOR.

The RF LEVEL and MIC GAIN controls are
two controls mounted on concentric shafts. The
RF LEVEL control (lever control) varies the output of the transmitter mixer, thereby varying the
RF output. Maximum drive to the output stages is
obtained with the control set at 10 (fully clockwise).
The RF LEVEL control functions only in the CW
mode of operation.

The BAND SELECTOR control is an eightposition switch used to select the desired band
for receiving or transmitting. This control also
indicates the low-frequency end of the band and
which scale, red or black, to read on the dial for
direct frequency determination.
4-10. PHONES JACK

The MIC GAIN control (round knob) varies the
audio level from the microphone amplifier stages
to the balanced modulator. The control has sufficient range to permit adjustment of any high-level
crystal microphone or low-level dynamic microphone normally used for voice communication.

The PHONES connector provides for the use
of commercially available headphones. When
headphones are used, the internal wiring to the
speaker terminals is disconnected.

4-13. FINAL TUNING.

4-11. PRESELECTOR.

The FINAL TUNING control consists of a
continuously tunable capacitor with a bandsegment indicator. This control tunes the final
output stage to the operating frequency.

The PRESELECTOR tunes to the desired
frequency within a given band, as indicated by the
setting of the BAND SELECTOR. The function of
the PRESELECTOR, however, is determined by
the OPERATION control. With the OPERATION
control in the STBY position, the PRESELECTOR
tunes the receiver RF and first mixer stages;
with the OPERATION control in the MOX or VOX
position, the PRESELECTOR tunes the transmitter
mixer and driver stages.

4-14. S-METER.

This meter functions as an indicator of rei ative signal strength in the Receive mode and as a
relative power output indicator in the Transmit
mode.

SECTION V
TUNING PROCEDURE
5-1. GENERAL.

PRESELECTOR . . . . Desired band segment

The tuning procedure of the Model SR-150
Transceiver is not complicated; however, care
should be exercised when tuning to insure peak
performance of the equipment. The following
paragraphs describe the procedures for receiver
and transmitter tuning.

RIT . . . . . . . . . . . . OFF
CAL . . . . . . . . . . . CAL (on)
CAL ADJ . . . . . . . . As required.
To calibrate, set the TUNING control to
the 100-KC point on the dial nearest the desired
frequency. Rotate the CAL ADJ control for zero
beat. It may be necessary to increase the AF
GAIN control to get sufficient indication at or
near zero beat. The RIT control switch must be
in the OFF position when calibrating. Turn the
CAL switch to OFF and tune to the desired
frequency. Peak the PRESELECTOR control for
maximum S-meter indication.

IMPORTANT

Before operating the SR-150, the Bias
Adj. control on the power supply must
be set. See paragraph 8-3 of alignment
procedure.
5-2.

RECEIVER CALIBRATION.

Preset the controls as indicated:

NOTE

OPERATION . . . . . . STBY (receive,powero~

The CAL switch should be in the OFF
pOSition in normal use of the receiver.
It should be in the CAL position only
when calibrating the receiver.

RF GAIN . . . . . . . . Maximum
AF GAIN . . . . . . . . As required
FUNCTION . . . . . . . Desired sideband
5-3.

BAND SELECTOR .. Desired band

BASIC TUNE-UP.

Preset the indicated controls as follows:

TUNING . . . . . . . . . 100-KC point nearest
desired frequency

OPERATION . . . . . . MOX
- 9-

switch to the VOX position. Adjust the delay control
(see figure 12) for the desired drop-out delay;
delay increases with clockwise rotation. Theunit
is now ready for break-in CW operation.

FINAL TUNING. . . . Desired band segment
FUNCTION . . . . . . . CW
BAND SELECTOR .. Desired band
TUNING . . . . . . . . . Desired frequency
PRESELECTOR ... Desired band segment

5-6. PUSH-TO-TALK SSB OPERATION (MOX).

RF LEVEL .. -.... Between 4 and 5, or as
required.

Use the procedure given in paragraphs 5-2,
5-3, and 5-4. Set the FUNCTION switch to the desired sideband (USB or LSB). SettheOPERATION
switch to MOX. Depress the microphone switch
(push-to-talk) and advance the MIC GAIN control
(while speaking into the microphone in a normal
voice level) until the S-meter indicates approximately one-half the level shown at saturation. The
MIC GAIN setting is not critical, because of the
action of the AALC circuitry, and may be advanced
slightly beyond this point to increase compression.
Typical settings will run from 5 to 8.

Adjust the RF LEVEL control until a small
indication is seen on the S-meter. In the transmit
mode, the S-meter indicates relative RF output
voltage. Adjust the FINAL TUNING control for
maximum output and then adjust the PRESELECTOR for maximum output indication. AdjusttheRF
LEVEL control as required to keep the S-meter
reading below S9, while tuning the PRESELECTOR.
5-4. MANUAL CW OPERATION.

Use the procedure as given in paragraphs 5-2
and 5-3. (If a key is plugged into the Key jack, J5,
it must be closed.) AdvancetheRFLEVELcontrol
to just below. saturated output.

5-7. VOICE CONTROLLED SSB OPERATION (MOX).

For voice operated transmission, use the
tuning procedure in paragraphs 5-2, 5-3, and 5-4.
Set the FUNCTION switch to the desired sideband
(USB or LSB). Set the OPERATION switch to the
VOX position. Set the receiver AF GAIN to "0" or
a low level. While speaking into the microphone,
advance the VOX gain control clockwise (see figure
12) until the VOX relay closes; use no more VOX
gain than necessary. Adjust the delay control for
the desired drop-out delay; delay time increases
with clockwise rotation. It may be necessary to readjust the VOX gain slightly because of interaction
between the controls. Adjust the receiver AF GAIN
to the desired listening level. Advance the QT
(anti-trip) control (see figure 12) clockwise until
received signals do not actuate the VOXrelay. Use
no more anti-trip gain than necessary.

Saturated output is determined in the following
manner. start at "0" settingoftheRF LEVEL control and slowly increase the control (clockwise)
while observing the S-meter. Set the control at a
point where further rotation does not cause an appreciable increase in the S-meter reading. This is
saturated output; operate slightly below this level.
The transmitter is now ready to key. To
receive, it is necessary to turn the OPERATION
switch to the STBY position.
5-5. BREAK-IN CW OPERATION.

Use the tuning procedure as given in paragraphs 5-2, 5-3, and 5-4. Set the OPERATION

-10-

SECTION VI
THEORY OF OPERATION

6-1. GENERAL.

6-3. TRANSMITTER SECTION.

The Model SR-150 Transceiver consists of a
double-conversion receiver and a double-conversion transmitter. The VFO circuitry, the
heterodyne crystal oscillator circuitry, and the
crystal filter/IF circuitry are common to both
the transmitter and receiver_Refer to figure 8
for a block diagram of the equipment and to
figure 21 for a schematic diagram_

The signal from the microphone is applied
through the first and second microphone amplifiers (VI8A and VI8B) and fed to an audio cathode
follower (V3B). The output of V3B is presented to
the balanced modulator along with the selected
signal from the carrier oscillator (VI0), to produce a double- sideband suppressed carrier signal.
The balanced modulator output signal is applied to the first 1650-KC IF amplifier (VI7A),
through the crystal-lattice filter (FLl) which
attenuates the unwanted sideband, to the receiver
and transmitter mixer (V2) where the signal is
added to the VFO (V9) output signal. The sum of
these signals (in the 6.0-MC to 6.5-MC range) is
then amplified by the tunable IF amplifier (V3A)
and fed to the transmitter mixer (V7) where it
is subtracted from the heterodyne crystaloscillator (V8) signal.

6-2. RECEIVER CIRCUIT.

The signal at the antenna is applied to the
receiver's RF amplifier stage (VIA) through the
antenna relay located in the transmitter final
amplifier section. This signal is amplified and
then fed to a mixer (V2), where it is mixed with
the signal from the heterodyne crystal oscillator
(V8), resulting in a variable IF signal of 6.0 MC
to 6.5 MC. The RF amplifier and mixer tuned
circuits are selected by the BAND SELECTOR
switch and tuned by the PRESELECTOR control.

The output of the transmitter mixer is the
desired operating frequency and is amplified by
the transmitter driver (VI6) and then fed to the
transmitter final amplifiers (V14 and VI5). The
selected final output signal is applied through the
antenna relay to the antenna.

The variable IF signal is amplified by a
tunable IF amplifier (V3A) and then mixed with
the signal from the VFO (variable frequency
oscillator), V9, in the receiver mixer (V4), resulting in a second IF signal of 1650 KC. This
signal is amplified by the first 1650-KC IF
amplifier (VI7A), passed through the crystallattice filter (FLl), and applied to the second
1650-KC IF amplifier (V5A). The output from
V5A is fed to the product detector (V6) where it
is mixed with the correct carrier oscillator
output to present the desired detected sideband
signal to the receiver first audio amplifier (VllA).

The tuned circuits of the transmitter mixer
and transmitter driver are selected by the BAND
SELECTOR switch and tuned by the PRESELECTOR control, while the final amplifier output
tuned circuit is selected by the BAND SELECTOR
switch and tuned by the FINAL TUNING control.
The Automatic Audio Level Control (AALC)
circuitry operates in the following manner. When
a small amount of flat-topping occurs in the final
amplifier, an audio Signal appears on the amplifier bias line, in proportion to the amount of flattopping. This audio signal, which is not present
without final amplifier flat-topping, is coupled to
the AALC amplifier (V5B) whose output is rectified by diodes CR7 and CR8. The resulting DC
voltage, which is in direct proportion to the
amount of flat-topping occurring in the final
amplifier, is connected to the 6.5-MC to 6.0-MC
IF amplifier and the first 1650-KC IF amplifier
as gain control bias.

The output of the first audio amplifier is
applied to the audio output stage (VI3) and then
to the speaker. The proper sideband is selected
by a shift in the VFO frequency coupled with a
selection of the proper carrier oscillator and the
passage of the signal through the crystal-lattice
filter, thereby rejecting the undesired sideband.
- 11 -

RECEIVER
RF
AMPLIFIER

RECEIVER
AND
TRANSMITTER
MIXER

I, R
T

TUNEABLE

12

I.

RECEIVER
MIXER

IF
AMPLIFIER

f2

CRYSTAL
LATTICE

f3

SECOND
1650KC
IF
AMPLIFIER

f3

FILTER

13

.--

RECEIVER
FIRST
AUDIO

X3

R

tf•

X,

I

t

X2

ANTENNA

X,

RECEIVER
AUDIO
OUTPUT

X3

R~

f,

PRODUCT
DETECTOR

tf.

f3

f3

T

X2
I,

X2

FIRST
1650KC
IF
AMPLIFIER

13

,

CARRIER
OSCILLATORS

VFO
6f ~500KC

yf.
I

HETERODYNE
CRYSTAL
OSCILLATOR

X,
ANTI-TRIP
RECTIFIER

"'11

.0'

X,

I,

t:

I
YDC

12

;0

I

,-

?>
OJ

0-

,...

;:::;

'"a

TRANSMITTER
FINAL
AMPLIFIER

f-----

VOICE
RECTIFIER

I-

0

-

-I

BALANCE
MODULATOR

a
"n

--+-

I
I

~

AUDIO
CATHODE
FOLLOWER

SECOND
MICROPHONE

f5

-----

RELAY
CONTROL
AMPLIFIER

Af5
f,

"...

..<'

VOICE
AMPLIFIER

DC

I

n

t:l
Q'

15

HETERODYNE SYSTEM
BAND
80
40

FREQUENCY
(f,)
3,5
4.0
7.0

HETERODYNE
CRYSTAL (X,)
10MC
13.5MC

7.3
20
15
10
10
10
10

14.0
14.35
21.0
21.45
28.0
28.5
28.5
29.0
29.0
29.5
29.5
29.7

20.5MC
27.5MC
34.5MC
35.0MC
35.5MC
36.0MC

TUNEABLE
IF (12)

VFO (X2)
UPPER SB LOWER SB

6.5
6.0
6.5

6.2

4.5483

4.5519

6.5
6.15

4.4983

4.5019

4.3983

4.4019

CARRIAGE OSCILLATOR (X,) OR LAST IF(I,)
UPPER S8

LOWER SB

1.6517

1.6481

SYMBOLS
~SIGNAL FREQUENCY (AMATEUR BANDS)

rI~ ~TUNEABLE
f

IF(6.5-6.0MC)

I I, ~FIXED IF
• f. ~RECEIVER AUDIO
f5 ~TRANSMITTER AUDIO
X, ~HETERODYNE OSCILLATOR. 8 CRYSTALS (I PER BAND)
X. ~VFO(61~500KC)
X, ~CARRIER OSCILLATOR. 2 CRYSTALS (UPPER S8. LOWER S81

6.5
6.05

SIGNAL PATH LEGEND
TRANSMITTER SIGNAL

6.5
6.0

-{>-

6.5

-.-

6.0

~ COMMON SIGNAL

6.5

...:;.-

OSCILLATORS

6.0

-;.-

VOICE RELAY

6.5
6.3

4.6483

RECEIVER SIGNAL

4.6519
MIXER FUNCTIONS

THE HETERODYNE SYSTEM UTILIZES TYPE CR-23/U, THIRD-OVERTONE,

MIXER
RECEIVE and TRANSMIT

IN RECEIVE
f, Xl;:; f2 OUTPUT

IN TRANSMIT

SERIES -RESONANT CRYSTALS.

RECEIVER

f2. X2-= f3 OUTPUT

NOT OPERATIVE

NOT OPERATIVE

XI-f2~f,

TRANSMITTER

---._ _ _ _ _ _ _ _ _ _ _

~

_ ______'=_'_'__=__-o-

f,+X2~ 12 OUTPUT

OUTPUT

15

MICROPHONE

SPEAKER

~

SECTION VII
SERVICE DATA
If a malfunction occurs when operating on
one particular band and/or mode of operation,
the unit should be checked on all other bands and
in all other modes of operation to isolate the
difficulty. A careful study of the block diagram
(figure 8) will give a quick clue as to which tubes
should be checked. The voltage and resistance
charts (figures 9 and 10) and schematic diagram
(figure 21) will also aid in isolating and correcting
a malfunction.

7-1. COVER AND CHASSIS REMOVAL.

A. TOP COVER REMOVAL. - Loosen the
four top-cover screws 1/4 turn only and remove
cover. To replace cover, tighten cover screws
1/4 turn only, so that the plastic latch nuts will
not be damaged.
B. BOTTOM COVER REMOVAL. - Remove
the four bottom cover screws located in the feet,
and remove the cover. When replacing the bottom
cover, make certain that the grounding clip on the
cover engages properly at the final amplifier
shield partition.

7-4. SERVICE AND OPERATING QUESTIONS.

For further information regarding operation
or servicing of the Model SR-150 Transceiver,
contact the dealer from whom the unit was purchased. The Hallicrafters Company maintains an
extensive system of Authorized Service Centers
where any required service will be performed
promptly and efficiently at no charge if this
equipment is delivered to the service center
within 90 days from date of purchase by the
original buyer and the defect falls within the
terms of the warranty. It is necessary to present
the bill of sale in order to establish warranty
status. After the expiration of the warranty,
repairs will be made for a nominal charge. All
Hallicrafters Authorized Service Centers display
the sign shown below. For the location of the
one nearest you, consult your dealer or your
local telephone directory.

C. CHASSIS REMOVAL. - To remove the
chassis from the cabinet, it is first necessary to
remove the bottom cover (see paragraph 7-1B).
Remove the four cabinet screws at the bottom
near the cabinet feet and carefully slide the
chassis and panel assembly out from the front
of the cabinet.
7-2. TUBE AND DIAL LIGHT REPLACEMENT.

Access to the dial light and all tubes may be
obtained by removing the top cover of the cabinet.
See paragraph 7-1A.
7-3. TROUBLESHOOTING.

In the design of this transceiver, full consideration was given to keep maintenance problems at an absolute minimum. As in all welldesigned electronic equipment, maintenance and
repair problems are generally confined to the
checking and replacement of tubes and semiconductor devices which may become defective.
Malfunctions of this nature are usually easily
isolated and corrected. However, it is entirely
possible that a more obscure malfunction may
arise. In this event, only thoroughly trained
technical personnel should attempt to service
eqUipment of this complexity.

Make no service shipments to the factory
unless instructed to do so by letter, as The
Hallicrafters Company will not accept responsibility for unauthorized shipments.
The Hallicrafters Company reserves the
privilege of making revisions in current production of equipment and assumes no obligation
to incorporate such revisions in earlier models.

A recommended aid to troubleshooting the
Model SR-150 Transceiver is ageneral-coverage
receiver which can be used to provide a quick
check on the various oscillator circuits within
the SR-150. A lead connected to the antenna of
this receiver, when placed in the proximity ofthe
oscillator tube in the circuit to be checked, can
determine the presence or absence of signal
from the stage in question.
- 13 -

AUDIO OUTPUT
VI3
6A05A

VOLTAGE REGULATOR
VIZ
---~
OA2

REc.tST AUDIO-AGC DET-VOX DIODE -aT DIODE
VII-A-B-C-D
6TSA

I.
2.

NOTES:
VARIES WITH SETTING of RF GAIN CONTROL.
CAL SWITCH ON.
--

*

'**
4. **** VARIES WITH RF LEVEL CONTROL.
5. ***** DEPENDS ON~ ACTIVITY (NOMINAL VOLTAGE INDICATED)

3. iE*iVARIES WITHBAND SELECTOR SETTING.

6, UNLESS OTHERWISE SPECIFIED,THE FIRST VOLTAGE LISTED IS FOR
RECEIVE CONDITION AND THE SECOND IS FOR TRANSMIT CONDITION.
1~ ALL MEASUREMENTS ARE MADE FROM TUBE SOCKET PIN TO CHASSIS,

FIRST a SECOND
MICROPHONE AMPLIFIER
VIS A-8
12AX7

FINAL AMPLIFIER
VI5
12GW6 /12D06B

RELAY AMPLIFIER /
vox AMPLIFIER
V19- A- 8
12AT7

FINAL AMPLIFIER
VI4
12GW6 /12DQ6B

PRODUCT DETECTOR
V6
12BE6

CARRIER OSCILLATOR / BFO
VIO
12AT7

t~~tk~o *****

, ,," ,_",,- t~~ti.;
TRANSMITTER DRIVER
VI6
128Y7

<

!!..
Q

H***

SECOND 1650 KC IF AMPLIFIER
AALC AMPLIFIER
V5 -A-B
6EAS

}.oI-----------

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r---/--o 6
07

SWITCH

BLACK/ WH I TE *' 18

HTRS

BROWN #'2

8L A CK

*,

2

ORANGE (S PA RE ) *rB

NOTES :
I.

C AUTIO N : OBSERVE POL A RIT Y.

2. THE WIRING SHOWN IS FOR NEGATIVE GROUNDED VEHIC LE S . IF TH IS UNIT IS
INSTALLED I N vEH IC LE S HAV IN G POSI TI vE GROU NDED BA T T E RI ES , L EA DS
MARKED 3 AND 4 ON TH IS SCHEMATIC M U ST 8E UNSOLD E RED AND INTERC HANGED
LEAD 3 .

SO THA T LEAD I CON N E C TS WITH LEAD 4 A N D LEAD 2 WITH

08 9-0029 79 B

Figure 18. Schematic Diagram of Moclel PS·150·12 DC Power Supply.

-25 -

SECTION XI
MOBILE MOUNTING RACK MODEL MR-150
11-1. DESCRIPTION.

Hallicrafters' Model MR-150 Mobile Mounting
Rack is a sturdy, compact unit designed to facilitate mobile installation of the Model SR-150
Transceiver. This mounting rack, with mounting
bracket and straps supplied, permits transmission
hump, floor, and/or under dash mounting of the
transceiver (see figures 4 and 5).
This rack is equipped with a cable for connection to the PS-150-12 Power Supply, an audio
connector brought out to the side for connection
to speaker, and provisions for a direct connection
to a suitable antenna.
The side panels of the mounting rack fit
snuggly against the transceiver for a secure
installation. Wing screws are supplied to attach
the transceiver to these side panels.
Details for installing this equipment in a vehicle are described in paragraph 3-4 and in
figures 4 and 5 of this handbook.

092-017932

Figure 19. Hallicrafters Model MR-1S0 Mobile Mounting Rack.

J 401

10

n

=

1/

12

0

REO/WHITE ·,8

t}-

~

7

4

r--=

-c::::J

B

5

9

J

,....,

575V

~

I

......

RED'#'8

2
2S0V

2

I:l$l

t::a

6

3

WHITE #,8
J402

~

3
-9SV

V

BLACK / WHITE '#'B

cp

4

BROWN ·,2

NOTE I

0- - - - -

-=-

BIAS

SWITCH

J
J403

TO TS S02 ON
PS-150-12.PINS
AS MARKED.
(SEE FIGURE IT)

I

/\
-1

BLACK

S~

·,2

FILAMENTS

6
GROUND

1

-

ORANGE'#'8

7
SPARE

U
NOTES;
THE AREA DOTTED IN SHOWS WIRING NECESSARY IF A COAXIAL
CONNECTOR IS AFFIXED TO THE SIDE OF THE MOUNTING RACK AND
INTERNAL COAXIAL CABLE ADDED BETWEEN THIS CONNECTOR AND
J403. IF DESIRED. THE ANTENNA MAY BE CONNECTED DIRECTLY TO
J403.

Figure 20. Schematic Diagram of Model MR-1S0 Mobile Mounting Rack.

- 26-

089-003331 B

REPAIR PARTS LIST FOR MR-1SO

Bracket, Mounting

067-010870

Cable Assembly

087-007656

Clamp, Cable •

076-002744

Connector, Phone Type (Speaker)

036-000338

Connector, Power (12-pin) . • •

010-002585

Connector, RF Type (Antenna)

035-000082

Guide Pin . . . . . . . . . . . .

074-002792

Knob, Decorative, Wing-Screw (2)

015-001768

Pad, Side Bracket (Left)

014-000475

•

Pad, Side Bracket (Right) • •

014-000483

Strap, Mounting (2) • • • • •

076-003202

- 27-

'. NOTES:

- 28-

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CR7 0.0.01
9f'__
IN295
IN2951.' 0.22

~~'55"

t-"f-a

,r-g-'-g2-,
CI27 CI2a

CI29

80M
~---+-----------; CI24

,
L33
0.7
MH

0.7
MH

l.'~~~

C~'

c'45r,1 C147-tlt
18 ~L39 85~L40 135
UUF
UUF
UUF

C!44

3B~ l'

CI34
0.001

UUF
RIOO
2700

L41

Rill

0.0051'

i~O

RI11
2.2
MEG

9

ZERO 5DK
MI

LSB

11'121

10

2

-

±g[~J5

BAL

CRll

l'gl~~

67-+-"-----::-:~-__,.C"'6R3-;:::::t=::!. ;~~~

t-1-N..

\

\

--

RI22
3300

2

.--c-,
3 2 2:.K
10 \~3
~'~.

\

S5

FRONT

9r[A;;4

REAR

\ LS
\

USB

RI24-~~I\

~ ~~aT r9 7~ 4":g~k

RI21
3300 820

CR 10
IN 87

[8

'~1fUUF
"

12AX7/EceS3
2ND MIC AMPL

~I~~

1/~~~A8

~ I

.);.,0',
'.~02'
""-,_+---,,190"-0{
-,

l':g!a

f.' ~ \

1- REAR I

RI;:

'0

\\
lOOK
\

,,

PTT IFUNCTIONI

S6

I

0.001'"

6--- ~I

FRONT
RI38 RI39
.
4700~M~G
MIC DISABLE

VISA
RI44
1/2
3900 12AX7 IECGB3
1ST MIC AMPL

:l'CjlgB
350V

"-

6_7

CI72
0001

3

;!:C[73
"'U'OUOF

~i: I

CI74~RI5!

R-95 VDC

VOICE

T: GNO

RI27
56K

AMPL

CRYSTALS NOT SUPPLIED.

** SEPARATE
ANTENNAS OR LINEAR AMPLIFIER WITH
ANTENNA SWITCHING RELAY USE THIS POSITION.
RESISTANCE MAY VARY FROM VALUE SHOWN. IF
REPLACEMENT IS NECESSARY, USE SAME VALUE
AS PART REMOVED.

'---/

RI54
_ II(

R157

6aK

,L·~·-~B~li~

2

~-_--+

DELAY

MEG

~

RELAY

MEG

RI56
6.2
MEG
ACTUATE

C 118

0.221'
~nJ5

.r---w

-

KEY
R: -95VOC

-,,

T: GND

UI\lLESS OTHERWISE SPECIFIED;
ALL RESISTORS ARE IN OHMS - 10 Yo,1/2 WATT.
ALL CAPACITORS ARE IN UF (SEE PARTS LIST FOR VOLfAGE RATING}
I OPERATION SWITCH IS SHOWN IN OfF (FULL CCW) POSITiON
FUNCTION SWITCH IS SHOWN IN CW(FULL CCW) POSIT[ON.
2 BAND SWiTCH IS SHOWN IN 3.5 Me {FULL CCWl POSITiON.
3. ALL FEEDTHRU CAPACITORS ARE IOOC UUF.

TO POWER SUPPLY

Figure 21, Schematic Diagram of Model SR-150 Transceiver,

3F-

CW BREAI(-IN KEYING

NOTES.
*

3

:or

+ 575VOC

VDC (WHT/RED)

~

CI77
001

RI5;-n~156
10
~2)

R F LEVEL DISABLE

BIAS
DIVIDER

Rlf2

~'-~i

I

PTT
INHIBIT

~__________________________________~XM~T~R~B_'A_S____R_._-9~5~VO_C___
T_:-_5_5_V_0_C______________________________~_____ 4_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __+----------~R~.--~95~_V~0~C~_T~:-~5~5~VD~C~____~33K

SWITCHlNG

CI76
0001

RI48
MEG
470K 5'Uc::.!IOOI(

RI26

CR61RI02
IN295 100 K

RELAY
TUBE

RI5,~H~

-: ..

R14!
RI43 Rl46 RI45
2200 _
I
I
470
MEG MEG

VI98

1/212AT7

RI53
330K

ISENS
MEG

-~'

··i -~--'-- - RI40

VI9A
VII D
I/ZI2AT7 6TSA
VOICE
VOX
AMPL
RECTIFIER

VOX

RI47
lOOK

pn

CW BREAK-IN KEYING
RELAY ACTUATE

l' 0.005

rd6~

FOLLOWER
C166* ~

I
CI67
~
9 rl0~

I

'6'"

g~~~

CATHODE

R131

B

~2d
I I

VISS
112

USB

CI65
0.22

LSB

\ !

\

:r

CI53
0.001

RI32
220K

t~-~-f-~-~-~-~-~-t-~-~'~~~~~~~~~~r~-:-~-~-=~~-~-=-~-~-~-~-~-~~1UF~~=B=A=L
=4~7~Kt~4dJ
,
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\
USB

~,!~

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0-1

a---·[
1~1[8

RI30
2700

RF LEVEL DISABLE

BIAS

+ 575

RI12
470K

-

METERIW
10K
82K RI23
R[20P
I

glgrl'

LSB

RI33
470
RI31
250

Rl34
470

RI08
L42
4700
270K
0.7
MH
+250VDC
C 146 t----::R...
[0~7~------~t-C-,4-9.;.;;;.;;..;.;;..-+---'

RF LEVEL DISABLE
R[OI
4700 el20
0.1

RIl4
IK

CI4~W!t

1

l'JJ? t9u~I l'J3?

L'.

----"

MI~~;~~~PL

147

I

l:.tf3!~CR95
~~ 3 lN295

RII~8

r - -,
L341

+250VDC

VDC

+150VDC REG

~
CI35
100

T: 1.5VDC

R:16VDC

T:1.SVDC

+250VDC

(BAND SELECTORI

I

t--I-

.".

IPHONESI
J3

i::T!1111t===l!==0=.0='='l'==C!==========~::::=====::::::::=:+:'5:0:VD:C=i:R:':G\t-_O_'
_~f~~
l

I

t6-

RIGO
1500

50arL

47
IW

-0--

KEYING

--- -- ---I----r-- - ---- -----------,

'd~!

MEG

__ 5 6

,.IOOK

1

~09K8

r

R 6

2F ___-~ -"'L~:
~6-c-l-I-B~R~9:A76L; o;,Ocr.01'6(~[t"iR~~6~3
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-8? ~~ ?C ~L?FO L
~

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I

,.

0~89_~3

=

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[

R

R79 ~CIOI
470K-

CR4
vloa

!

UUF

-

25K

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L30

1~105K ~~5

R60-

113:t

CUiU:'

CR3

C911'

.

. 0005

I-~

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3
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-

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220KT27
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_
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~2i'iqC981~102 ~~~~.
~::~Ir=;V7iI7i0:====T=4~~1r-:::J~.

L26

clla
0.1

2500

.--~R~:A~V~C~_T~:~G~N~D~~--------+_------_+------------+------------------_4--_+~~~
R:16VDC

R97
8.2
M G

5 R95

. - -_ _- - '

~2:=====::::;-1 ,i6::~~it I, ~:~ 4~ ~6
-f~~Q5 C~~ ~+-l~~~;~:--· ~g~if;::TH1~!-'F:-0-~-L-0-W-E-R---i-i _+I(-~ t-,~:c;:9S" :-7-"U-H~sl:!2'~9:O"~;;
;

III

I...

:'-',,,4"--_ _ _ _ _ _ _ _ _- ,

....------'8

~~go

R40
47K

*~62
5 't o.001
l;;

Itf~6

R29
470K

0.011'

7

C42;:[ R24
O.Olt 41K

C39

-

R20
220K

I

I
LP ~

46~2~~

I
I

~~4

Ll5 1
I

L_

[1;

R23
15 K

3

:

~Rl

R F GAIN

2

-

I

I

_J_~~I:~!.':'--j:,r:=t=:t::j'::NT:
'

..
~

I

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I
C37

:=;-

6

V6
12 BE6
PRODUCT
DETECTOR

'j
r!~~~52~

~,-----

,

T

R:

~~; ~iS~~C

IXER

r+~2~5~O~V~0~C:I~~~~~~~~~~~~~~~~~:t~~~~~~~~~~~~~~=t~=t~~~+~2=5=0~V~DC~~~~~~~~~~~~~~~~~i1--------------~rc~~~~~~~--------r_----1+~25~0~V~0~C
____' _____L___~~~:::_11--JE~----------------------------------_r+~2~50~V~D~C~_____:~~~~--t1------~~--~'OW
_
_____
_
--r
_ _ _ _ _ _ _ fBA_NDSELECTORI _____
i
C85p+150VDCREG:
+150VDCREG
~~~
+150VDCREG
G~iN

:,

RFLEVEL DISABLE

J

r;c~-~+-~-_~~_6t=1~~,-M-C$--+--:---' RECIE~:E~ ~

C

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__

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IPRESELECTOR I ___________ +[

3-

V4

L~AG~C~_____________l------------------------~~------------------~AG~C~------~_+----~-=======~========~======t==+==t=========~A&G£C~~=======+=====t======:t~~====~==~=+==AA~G£C====~====~=============t~~~~~~~====~-T~R~.A~N~SMM~IT~T~E~R~G~N~D~--------~.._~

C33

[
R:4

(

R: GND

,

"470"

C7E

Ul!F"

~-

T2

1650KC

:

:_,:5

C7B

1

:3_____ ~ __

__

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-

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TRAP

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9

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J/26EA8

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81~ o~~~f Tg~:

7
~l3
Rll
IL 2
07
I~
M H 47t27 -

I

------------r---------:7--

19.

Ll2lL----..::

RF GAIN

,
ISANDSELECTORI:

3

gj'

tr---:

100
UUF

I~

!

I

C 16

6.0-6.5
MC

~O~ t---------<

;~L;;kC24

SIF

FRONT6\i'::'::: 'I'J,';F
~----1(_---------+__--~C23
C26
CI7
3900

5-25T125
""UUF ""UUF

, -_ _ _

:,- h,

10

~

l'O.005

T. - a5VDC

1'0<-0'~4

I
MEG-

C20

...

C6
10
UUF

I

~>n

t~~Fti\CB51~RIOI

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R6

R5

47K

TI

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RI63
220K

I

,

V2

cbY'

:

SI'
FRONT

------

______ +-_--l_I-_-_-_+-_-_-1_E-_-i
_______________________________

:

COMMON OR J 2
TRANS ONLY>--..--l\U-.+--------'
0.7
_MH

-

R3 :

I
MEG

MEG

40M

~

IN456
R2

RI

[

--

~ 'I='-

CRI2

u~9BOO
C7A

20M

--

.-------.-L-6--------------.

~~

C6

U2U2Fl'

_

15M

-

VIB
1/2 6AZ8
100KC XTAL CAL

~_2'___+_~15-K___i
;*'
*'
lJ~F~R~0~NT~6~5~~~tM1~~==l-11B~~~~~U:U~F~~l~~~-~5
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-

V3A

,----T-,",,",'12J)2 3
3

-

SERVICE REPAIR PARTS LIST MODEL SR-150
Schematic
Symbol

Description

Hallicraiters
Part Number

Schematic
Symbol

CAPACITORS
482-132180

C104,105

482-161850
493-121350-334

C114
C115 A&B
C119,123

482-132150

C121

482-132220

C122
C124

10 1"11 F, 5%, 500V,
Plastic Mica
47 IlIlF, 20/" 500V,
Plastic Mica
Cl0,11,37,
000211 F, 20%, 600V,
55,61,112,117, Ceramic Disc
137,168,169,
170,171,179,
180
C12,13,29,
0.005 I" F, 20%, 500V,
30,35,36,41,
Ceramic Disc
68,69,75,79,
102,113,132,
133,146,149,
150,151,162,167
C14,17,22,26, 100 IlIlF, 2%, 500V,
27,57,74,78,
Plastic Mica
81,126,130,
135,136,173,
174
Variable, Trimmer,
C15,164
51lllF to 251lllF
C16
125 Illl F, 2%, 500V,
Plastic MiCa
C21
33 I'll F, 2%, 500V,
Plastic Mica
C28,31,34,
O.OIIlF, 20%, 500V,
39,40,42,43,
Ceramic Disc
44,46,51,53,
54,56,64,67,
82,84,107,
110,152,154,
159,160,177,
181
C32A,B,C,
Variable, TUNING
D,&E
C38
39 Illl F, 2%, 500V,
Plastic Mica
C45,47,49,62, 0~001 Il F, 20%, 500V,
Ceramic Disc
65,80,83,99,
111,116,134,
153,155,161,
166,172,176
C48
361l1lF, 2%, 500V,
Plastic Mica
C52,72
821l1lF, 2%, 500V,
Plastic Mica
C58,157,
0.22IlF, 10%, 200V,
Paper Tubular
165,178
C60,109
470IlIlF, 2%, 500V,
Plastic Mica
C63,100
5 11 F, 25V, Electrolytic
C66,118,
001 IlF, +80%,-20%, 100V,
120
Ceramic Disc
C73
1201l~F, 2%, 500V,
Plastic Mica
6~8 Illl F, ±0,5 Illl F, 500V,
C77
Plastic Mica
C85,91,98,
1000 Illl F, GMV, Ceramic
Feed-Through
101,156
C86
3.3 ~Il F, ±0,5 1111 F, 300V,
Plastic Mica
C87

482-132100

C3,20,148
C4,24,25,143
C5,70
C6,23
C7A,B,C,
D,&E
C8,33,59,
76,108
C9,50,71

482-361392
C125
048-000526

482-151470
C138
047-100471
C140,141
C142
047-100442

C90
C92
C93,94
C95
C96,139
C97
Cl03,106

C144
C158
C175

51 MIL F J 29;" N30,
Ceramic Tubular
12 I'll F, 5%, N470,
Ceramic Tubular
43 IlIlF, 2%, 300V,
Plastic Mica
910 Illl F, 2%, 300V,
Plastic Mica
181"1lF, 5%, 300V,
Plastic Mica
Variable, Trimmer)
008 I'll F to 13 Ill' F, 3000V
(Piston type with hardware)
681'IlF, 2%, 300V,
Plastic Mica
Variable, Trimmer,
8 ~~F to 50 i"ilF

Schematic
Symbol

3301l1lF, 2%, 500V,
Plastic Mica
10 Il F, 50V, Electrolytic
2 x 30 Il F, 350V, Electrolytic
0.001 Il F, 20%, 3000V,
Ceramic Disc
51l1lF, ±0,51lIlF, 500V,
Plastic Mica
Variable, FINAL TUNING
220IlIlF, 2%, 500V,
Plastic Mica
150 Illl F, 2%, 500V,
Plastic Mica
390 IlIlF, 2%, 500V,
Plastic Mica
0.01 Il F, +80%,-20%, 500V,
Ceramic Disc
lOOOIlIlF, 2%, 500V,
Plastic Mica
510IlIlF, 2%, 500V,
Plastic Mica
270 Illl F, 2%, 500V,
Plastic Mica
680 Illl F, 2%, 500V,
Plastic Mica
0.1 IlF, 10%, 200V,
Paper Tubular
0.002 IlF, 20%, 500V,
Ceramic Disc

482-161331
045-000755
045-000902
047-100397
493-110050-531
048-000525
482-161221
482-161151

493-121250-334
482-151330

R1,2,8,139,
143,146,149,
152,158
R3
R4 and 91,
R46 and 140

047-100354

048-000522
482-151390
047-001671

482-151360
482-161820
046-001298-04
482-261471
045-000938
047-001428
482-161121
493-140680-531
047-001308
493-140330-521
044-000568

491-024510-31
491-005120-83
481-151430
481-261911
481-132180
044-000520

138
R58
E6!
R62
R68
R70,83,100,
130
R71, 129, 157
R72
R76
R78
R80

R82
H85,86,121
R89,90
R95
R96,150
R97,156
R99

R126
R127
R131
R144
R153
R155

482-261102
482-261511
482-161271

R160
R161,162

2700 Ohms, 1 watt
470 Ohms, 1 watt
47K Ohms, 2 watts
270K Ohms
820K,Ohms
2.2 Megohms
3300 Ohms
82K Ohms, 1 watt
Variable, 50K Ohms, 20%,
0.2 watt, Meter Zero
33K Ohms
56K Ohms
Variable, 250 Ohms,
0.3 watt, Balance
3900 Ohms
330K Ohms
Variable, 10 Megohms,
20%, 0.2 watt, Delay
1500 Ohms
10 Ohms

451-352272
451-352471
451-652473
451-252274
451-252824
451-252225
451-252332
451-352823
025-002065
451-252333
451-252563
025-002064
451-252392
451-252334
025-002066

Description

047-100395

451-252105

Ll
L2
L3
L4
L5
L6,13,16,
25,26,29,
33,36,42
L7,37
L8,38
L9,39
LlO,40
Lll,41
L12
L14,15
L17,18

451-252184
451-252153
451-252154
451-252222
451-252101
451-652153
451-252102

L19,20
L21
L22
L23
L24

451-252221
451-252474

L27
L28
L30
L31

451-252224

L32
L34,35

451-252223
451-252820
451-252104

Tl,2
T3
T4,6

451-252471

T5

451-252182
451-2"2103

Coil, Antenna, 15 Meters
Coil, Antelma, 20 Meters
Coil, Antenna, 40 Meters
Coil, Antenna, 80 Meters
Coil, Antenna, 10 Meters
Coil, 0.7 MH RF Choke

051-003350
051-003347
051-003345
051-003346
051-003531
053-000530

Coil, Mixer and Driver,
10 Meters
COil, Mixer and Driver,
15 Meters
Coil, Mixer and Driver,
20 Meters
Coil, Mixer and Driver,
40 Meters
Coil, Mixer and Driver,
80 Meters
Coil, 600-MC to 605-MC
Trap
Coil, IF, Filter Termination
Coil, Crystal Oscillator,
10 Meters
Coil, Crystal OSCillator,
10 Meters
Coil, Crystal Oscillator,
15 Meters
Coil, Crystal Oscillator,
20 Meters
Coil, Crystal Oscillator,
40 Meters
Coil, Crystal Oscillator,
80 Meters
Coil, VFO
Coil, 27 IlH RF Choke
Coil, 1 MH RF Choke
Coil, Final Amplifier
RF Choke
Coil, Final Amplifier
Pi-Output
Coil, Parasitic Choke
Assembly
Transformer, Variable
IF, 605 MC to 600 MC
Transformer, IF, 1650 KC
Transformer, BFO and
Balanced Modulator OUtput
Transformer, Output

051-003532

SIC,D,
F,H
SIG
SIJ
S2
S3
S4
S5
S6
S7

Vi

22K Ohms, 1;·1 watt
16K Ohms, 1/4 watt

45]" 152223
451,,152183
451-152273
451,,652472
451-252272

Vll

Typt: 6AZB

V7
V8,lO,19

Tube,
Tube,
Tube,
Tube,
Tube,
Tube,

Tyl''' 6EA8
Type 12BE6
TYVe 6AH6
Type 12AT7
Type 6TEA
Type OA2
Type 6AQ5A
Type
Type
Type 12AX7/ECCB3
Type lN295

Part Number

Rotary, BAND SELECTOR
(Inc. SlA ONLY)
Wafer, Crystal Oscillator
and Transmitter Mixer
Wafer, Antenna, RF
Amplifier, Mixer, and
Final Input
Wafer, Driver Output
Wafer, Final Pi-OUtput
SPST, Antenna
Rotary, CAL-OFF
SPST, RIT-OFF/ON
Rotary, FUNCTION
Rotary, OPERATION
(Inc. S7)
SPST, POWER

060-002442
062-000195
062-000196
062-000198
062-000197
060-100440
060-002555
Part of R82
060-002441
060-002443
Part of 86

CRYSTALS

Yl
Y2
Y3
Y4
Y5
Y6
Y7
Y8
Y9

***
***

***

YIO

Yll

100 KC, Crystal Calibrate
36,0 MC, 10 Meters
35.5 MC, 10 Meters
35.0 MC, 10 MeterS
3405 MC, 10 Meters
2705 MC, 15 Meters
2005 MC, 20 Meters
13.5 MC, 40 Meters
1000 MC, 80 Meters
164801 KC, LSB
1651.7 KC, USB

019-002712
019-002940-08
019-002940-07
019-002940-06
019-002940-05
019-002940-04
019-002940-03
019-002940-02
019-002940-01
019-002945-01
019-002945-02

*** Not Suppliedo
CONNECTORS

051-003349
051-003342

Jl,2,4

051-003340
051-003341

J3,5
J6
J7

053-000665

051-003343
051-003529
051-003344
051-003530
051-003351
051-003509
053-000666
053-000580
053-200426

FLI

051-003348
053-000676
050-000786
050-000890
050-000881
055-000469

090-901417
()90-901474
090-901350
090-900040
090-900793
090-000034
090-901403
090-900001
090-901331
090-901475
090-901192

451,~25268:;

Via

451
451-152222
451-252273
025-002061

1,'1.8

025-002062

CR4

451-252821
451-252475
024-001467
025-0()2067

lN87
019-002941
CR12
Diode" Type lN456
019-002964
** See Seetion H J Page 3 for Tube Functions,

048-000464

Bristol Wrench
(TUNING Knob)
Cabinet
Cable Assembly (Harnessed)
Coupler, Solid
Cover, Cabinet Bottom
Cover, Cabinet Top
Cover, VOX Relay
Dial Window
Disc, Dial (TUNING)
Emblem, Hallicrafters Logo
Escutcheon
Escutcheon Plate
Filter, Crystal Lattice
Foot, Plastic (4)
Front Panel
Gear, Pinion
Gear, Spur (Fixed)
Gear, Spur
Handle, Knob
Iron Core (Coil Slugs)
Iron Core (L27 Only)
Knob, AF GAIN, MIC GAIN,
and RIT (Round)
Knob, BAND SELECTOR
and FUNCTION
Knob, CAL ADJ and
CAL-OFF
Knob, FINAL TUNING and
PRESELECTOR

033-001071-11
150-003099
087-007664
029-100264
066-003141
066-003140
066-201460
022-000696
083-001012
007-000850
007-000812
007-000813
049-000216
016-201072
068-001174
026-001087
026-001088
026-001089
030-000793
003-203388
003-203305
015-001773
015-001760
015-001755-02
015-001690-21
Ol5-GG1T75

140,,01

Ml
DS!

1(2,3

Kl
019-301980

Antenna (Receive and
036-100041
Common), 500-0hm
Output
036-200210
PHONES and Key
Microphone (lnco Hardware) 010-101569
Power Input (12-pin Jones
010-002586
type)
MISCELLANEOUS

050-000801
051-003353

**ELECTHON TUBES & DIODES

Type

451-252825
451-352470

SI
SIB,E

451-252152
451-252100

COILS & TRANSFORMERS

451-2521?2

68K Ohms
680 Ohms
2200 Ohms, 1/4 watt
27K Ohms
Variable, 25K Ohms, 30%,
1/3 watt, CAL ADJ
VarIable, 25K Ohms, 30%,
1/3 watt, RIT (Inc. S4)
820 Ohms
407 MEgohms
2500 Ohms, 5%1 10 watts
1

Hallicraiters

Schematic
Symbol

SWITCHES

482-261681

4700 Ohms

27K Ohms, 1/4 walt
4700 Ohms, 2 watts
2700 Ohms

Hallicrafters
Part Number

* All RESISTORS are carbon type, 10%, 1/2 watt unless
otherwise statecL

046-001294-04

180 Ohms
451-252181
Variable, Dual: 10K Ohms,
025-002063
30%, 1 watt, RF GAIN and
500K Ohms, 30%, 1/4 watt,
AF GAIN; 10K Ohms, 30%,
1 watt, RF LEVEL and
500K Ohms, 30%, 1/4 watt,
MIC GAIN
47K Ohms
451-252473

R5,1l,17,24,
31,36,37,39,
40,49,52,77,
113,136,137,
159
180K Ohms
R6,81
15K Ohms
R7,27,30
R9
150K Ohms
2200 Ohms
Rl0,38,43,
141
R12
100 Ohms
15K Ohms, 2 watts
R13,23
RI4,15,18,
1000 Ohms
28,33,42,
50,53,54,55,
56,57,59,60,
63,69,73,114,
128,154
RI6,22,32
220 Ohms
RI9,29,51,66, 470K Ohms
79,112,148
R20,34,64,67, 220K Ohms
74,92,93,94,
132,163
R21,65,124
22K Ohms
R25
82 Ohms
R26,35,41,75, lOOK Ohms
84,87,102,110,
115,125,135,
142,147,151,
470 Ohms
R44, 103, 133
134,145
1800 Ohms
R45
10K Obms

481-161680
044-200437

I Megohm

R104
Rl07
Rl09
Rll1
R116
R117
R118,122
R119
R120

482-161391
047-100224

*RESISTORS

044-100473

Description
* RESISTORS (CONT)

482-161101

Nil.e;;}

C89

CI27,128,
129
C131

481-151270

CB8

Part Number

CAPACITORS (CONT)

181l1lF, 5%, 500V,
Plastic Mica
85 Illl F, 2%, 500V,
Plastic Mica
135 IlIlF, 2%, 500V,
Plastic Mica
151l1lF, 5%, 500V,
Plastic Mica
22 IlIlF, 5%, 500V,
Plastic Mica
3900 /lI.L F, 2'1'-, 500V,
Plastic Mica
Variable, PRESELECTOR

Cl,18,145,
163
C2,19,147

Hallicrafters

Description

NO. 1815
Pointer,
TUNlliC
and PHESELECTOR
POinter, TUNING Dial
Relay, RF Swilchmg and
Antenna
Relay, VOX
Screw, Machine (TUNiNG
knob spinner)
Skirt, TUNll'iG Knob
Spring, Anti-Backlash
Switch Wafer
Washer, TUNING
6'pinner

083·001015
075-000841
052-()00205
426·003543

094-9032868

563

Printed in U.S.A.



---

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