Codan Radio Communications UT-4-400 UT-4x400 UHF Transmitter User Manual IM23D UT4400AMP 1 UHF Ampli

Codan Radio Communications UT-4x400 UHF Transmitter IM23D UT4400AMP 1 UHF Ampli

manual

MT-3
/MT-4
RADIO
SYSTEMS
UHF AMPLIFIER
INSTRUCTION MANUAL
UT-3 / UT-4
406 - 470 MHz
Covers models:
UT-3/400 Amplifier
UT-4/400 Amplifier
Copyright © 1998
Daniels
Electronics
Ltd.
All
rights reserved. No part of this
publication
may be
reproduced, stored in a
retrieval
system or
transmitted
in any form or by any means,
electronic,
mechanical,
photocopying, recording or otherwise, without the prior written consent of
Daniels
Electronics
Ltd.
DE™
is a
registered
trademark
of
Daniels
Electronic
Ltd.
registered
in the United States Patent and
Trademark
Office.
Issue:
Peliminary
Previous Issue: N/A
Issue
Date:
October
98 Previous Issue
Date:
N/A
Daniels
Electronics
Ltd.
Printing
Date:
October
98
Victoria,
B.C.
Part No.:
IM23D-UT
34400AMP
PRINTED IN
CANADA
DE
DANIELS
ELECTRONICS
ii
UHF Amplifier Instr
uction Manual UT-3 406 - 512 MHz
Reviewed By:
Quality
Assurance:
Larry
Freeman
_________________
Name Signature
Date
NOTE:
The
user's
authority
to
operate
this
equipment
could be revoked through any
changes or
modifications
not expressly approved by
Daniels
Electronics
Ltd.
The design of this
equipment
is subject to change due to continuous
development. This
equipment
may
incorporate
minor changes in
detail
from the
information
contained
in this manual.
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3/UT-4 406 - 512 MHz
iii
TABLE OF CONTENTS
Page
1 GENERAL....................................................................................... 1-1
1.1
Introduction
............................................................................. 1-1
1.2 Perf
ormance
Specification
............................................................ 1-1
2
THEORY OF OPERATION
................................................................... 2-1
2.1
Amplifier
Operation
.................................................................... 2-1
2.2 Power
Requirements
................................................................... 2-2
2.3 RF
Circuitry
............................................................................ 2-2
2.3.1
UT-3/400 Lowpass
Filter
.................................................... 2-2
2.4 Power Control
Circuitry
............................................................... 2-3
2.5 Power Sensing
Circuitry
.............................................................. 2-3
2.5.1
Output
Power Sense.......................................................... 2-3
2.5.2
VSWR Sense.................................................................. 2-4
2.5.3
VSWR
Overload
.............................................................. 2-4
3
UT-3/400 AMPLIFIER ALIGNMENT
...................................................... 3-1
3.1 General.................................................................................. 3-1
3.2 Repair Note............................................................................. 3-1
3.3
Recommended
Test
Equipment
List................................................. 3-1
3.4 Printed
Circuitboard
Numbering
Convention
....................................... 3-2
3.5 Standard Factory Settings and Jumper Configuration............................. 3-2
3.6 UT-3/400
Amplifier
Alignment
....................................................... 3-2
3.6.1
General......................................................................... 3-2
3.6.2
UT-3/400
Amplifier
Adjustment
............................................ 3-3
3.6.2.1
General Set-Up....................................................... 3-3
3.6.2.2
Output
Power
Alarm
(Forward Power) ........................... 3-4
3.6.2.3
Output
Power......................................................... 3-5
3.6.2.4
Antenna
VSWR
Alarm
(Reverse Power).......................... 3-5
3.6.2.5
Antenna
VSWR
Overload
........................................... 3-6
3.6.2.6
Procedure
Verification
............................................... 3-6
4
ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
.................................... 4-1
4.1 UT-3/400 UHF
Amplifier
Component
Layout..................................... 4-2
4.2 UT-3/400 UHF
Amplifier
Schematic
Diagram
..................................... 4-3
4.3 UT-3/400 UHF Lowpass
Filter
Component
Layout............................... 4-5
4.4 UT-3/400 UHF Lowpass
Filter
Schematic
Diagram
............................... 4-5
DE
DANIELS
ELECTRONICS
iv
UHF Amplifier Instr
uction Manual UT-3 406 - 512 MHz
5 PARTS LISTS...................................................................................5-1
5.1 UT-4/400 UHF
Amplifier
Electrical
Parts List......................................5-1
5.2 UT-4/400 UHF
Amplifier
Mechanical
Parts List...................................5-4
5.3 UT-3/400 UHF Low Pass
Filter
Electrical
Parts List..............................5-4
6
REVISION HISTORY
..........................................................................6-1
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
1-1
1
GENERAL
1.1 Introduction
The UT-3/400
Amplifier
provides the final stage of RF
amplification
and
filtering
for the
entire
UHF
Transmitter
UT-3 406 -512 MHz family. The
amplifier
has four
distinct
frequency ranges:
406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz and 490 to 512 MHz as well as two
distinct
output power ranges: 0.5 to 2.0 Watts and 2.0 to 8.0 Watts. The UT-3/400
Amplifier
is housed in
a
machined
aluminum
case that ensures
optimum
RF shielding, provides a good
ground,
and also
acts as a heatsink.
Additionally,
the UT-3/400
Amplifier
is equipped with output power and VSWR sensing lines
which can be
individually
configured as open
collector
or
linear
outputs. The
internal
VSWR
sensor protects the
amplifier
from high
antenna
VSWR by
approximately
halving the amplifier's
RF gain when a VSWR overload
condition
is present.
Output
filtering
for the UT-3/400
Amplifier
is provided by the UT-3/400 Lowpass
Filter
Board.
The lowpass
filter
assembly is mounted in a
separate
compartment
of the
amplifier
case in order to
provided
maximum
attenuation
of
harmonic
and other spurious signals.
Refer to Section 4 for the UT-3 406 - 512 MHz UHF
amplifier
and lowpass
filter
component
layouts and
schematic
diagrams
1.2
Performance Specification
Type: MT-3 series UHF
Amplifier
module.
Compatibility:
MT-3 series
Transmitter
Main
Board.
Frequency Range: 406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz or
490 to 512 MHz.
RF Power
Output:
adjustable
0.5 to 2.0 Watts or 2.0 to 8.0 Watts
RF power Input:
nominal
level
adjustable
from +4 dBm to +10 dBm,
held within +/- 2 dB of nominal.
Ouput
Impedance
and
VSWR:
50 , Type N
connector;
3:1 max. VSWR.
Input
/Output
Isolation:
> 60 dB
Duty
Cycle:
100%: Continuous
operation
from -40˚ C to
+60˚C.
DE
DANIELS
ELECTRONICS
1-2
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
Harmonic Emissions: Less than -80 dBc .
Transmitter
Mismatch
Protection:
20:1 VSWR at all phase angles.
Transmitter
Alarm:
Forward power sense and reverse
VSWR;
- open
collector
output
(separate
or
'
OR'ed
configuration);
-
linear
output
(separate
lines only).
Operating
Temperature
Range: -30˚ C to +60˚ C,
optional
-40˚ C
temperature
test.
Operating
Humidity:
95% RH (non-condensing) at +25˚ C.
Operating
Voltage:
+13.8
Vdc Nominal (range +11 to +16 Vdc),
+9.5
Vdc Regulated.
Transmit
Current: 0.7 Amp
typical
; 1.1 Amp
maximum
Amplifier
Standby Current: less than 0.5 mA.
Amplifier
Enable:
Active
to
ground.
Amplifier
Enable
Response:
typically
overdamped, rising to within 90% of full power
within 5 msec;
maximum
(underdamped)
overshoot of
30%.
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
2-1
2
THEORY OF OPERATION
2.1
Amplifier Operation
The
operation
of the UT-3/400
Amplifier
varies
slightly
according
to whether the
amplifier
is a low
power
(0.5-2.0
W) or a high power
(2.0-8.0
W) version. The low power
amplifier
does not use
transistor Q1 to boost the output power; consequently, it does not require the
+13.8
Vdc supply.
In both versions the power control
circuitry
monitors the RF output power of
amplifier
U4 and
keeps the power constant. Therefore, the output power from the high power
amplifier
will change
as the
unregulated
+13.8
Vdc supply varies. Note that the frequency band does not change how the
amplifier
operates;
it only changes a few
component
values in the RF circuitry.
Power for the UT-3/400
Amplifier
is provided from the MT-3
Transmitter
Board. The
+13.8
Vdc
supply (if required) is
continuously
connected
to the
amplifier;
whereas, the
+9.5
Vdc supply is
always switched by the transmitter's PTT circuitry. The UT-3/400
Amplifier
will not consume any
power from the
+13.8
Vdc supply
until
+9.5
Vdc is switched on for the amplifier's
circuitry
and
an RF input signal is present. The synthesizer or crystal control module controls the
+9.5
Vdc to
the amplifier's
circuitry;
switching it on by grounding the amplifier's input
enable
line. The
synthesizer will ground the input
enable
line only when the
synthesizer's
RF signal is phase
locked. This prevents unwanted spurious emissions during
transmitter
start-up. A
typical
start-up
sequence is
listed
below:
1)
+13.8
Vdc is always present
2) the
transmitter
is keyed on
3)
+9.5
Vdc is switched on by the PTT
circuitry
and the synthesizer
or crystal control module PTT line is pulled low
4) an RF signal is output to the
amplifier
5) the amplifier's input
enable
line is
activated
6) the
amplifier
outputs RF power
DE
DANIELS
ELECTRONICS
2-2
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
2.2
Power Requirements
Typical
current
requirements
for the UT-3/400
Amplifier
at
different
power levels are given in the
Table
2-1 below. The current drawn from the
+9.5
Vdc supply should never
exceed
1.2 Amps
and the current drawn from the
+13.8
Vdc supply should never
exceed
1.5 Amps.
Table 2-1
UT-
3/400 Amplifier Current Consumption
0.5 to 2.0 Watt Amplifier
2.0
to
8.0
Watt
Amplifier
Output
+9.5
Vdc
Output
+9.5
Vdc
+13.8
Vdc
Power Supply Current Power
Supply Current
Supply Current
0.5 W 0.65 A 2.0 W 0.64 A 0.51 A
1.0 W 0.87 A 4.0 W 0.79 A 0.75 A
1.5 W 1.02 A 6.0 W 0.89 A 0.93 A
2.0 W 1.17 A 8.0 W 1.04 A 1.10 A
Note:
Current consumption measured at 470 MHz
2.3 RF Circuitry
The RF
circuitry
consists of several blocks: a 5 dB input pad (R1, R2, and R3), an RF
amplifier
module
(U4),
an output power boosting transistor (Q1), three
directional
couplers (TL1, TL3, and
TL4), and the UT-3/400 Lowpass Filter. The heart of the UT-3/400
Amplifier
is RF
amplifier
module
U4.
This module
amplifies
a 1 mW signal up to a
maximum
of 2.0 W, at the
antenna
connector, for a low power unit. In high power units, the output of U4 is further
amplified
by Q1
to a
maximum
of 8.0 Watts at the
antenna
connector.
Capacitors
C17 and C24 provide tuning for
transistor
Q1's
input and output match.
Although
the input
match
and the output
match
for Q1 are
tunable, the networks have been made broadband so that the high power
amplifiers
will
operate
over the same frequency range as the low power amplifiers. The frequency band of the UT-3/400
Amplifier
is
determined
by the
operating
frequency range of the RF
amplifier
module
U4.
Directional
couplers (TL1, TL3, and TL4) are used to sample forward and reverse
power.
The
sampled power is used by the sensing and power control
circuits
to control the amplifier's
operation. The final step in the RF path is output
filtering
and, as
mentioned
earlier, this is done by
the UT-3/400 Lowpass Filter.
2.3.1
UT-3/400 Lowpass Filter
The UT-3/400 Lowpass
Filter
is a 50 ohm, 9 pole,
reciprocal
filter
with a 3 dB cutoff frequency of
approximately
512 MHz. The lowpass
filter
assembly
attenuates
the desired
signal's
harmonics as
well as any other out-of-band emissions so that a
'clean'
RF signal is output to the
antenna
connector.
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
2-3
2.4
Power Control Circuitry
The UT-3/400
Amplifier
employs a closed loop power control which uses a sample of the forward
RF power to control the gain of RF
amplifier
U4.
Op-amp U1b compares the sampled RF
voltage
to the output power
setpoint
and
generates
an error signal which Q3 uses to control the
voltage
on
U4's
gain control pin. The output power
setpoint
is
determined
by R7, the
Output
Power
Adjust
potentiometer.
In low power
amplifiers
jumper JU5 is
installed
and the forward power is sampled by TL3, D6,
C27, R18, L11, R19, and C28. In high power
amplifiers
jumper JU5 is not
installed
and the
forward power is sampled by TL1, D5, C14, R13, L6, R12, and C15. In both high power and
low power amplifiers, the power control
circuitry
keeps the output power of U4 constant.
Therefore, in high power amplifiers, the amplifier's output power will
fluctuate
with
variations
in
the
+13.8
Vdc supply voltage.
2.5
Power Sensing Circuitry
The UT-3/400
Amplifier
is equipped with output power and VSWR sensing lines which can be
individually
configured as open
collector
or
linear
outputs. In open
collector
configuration, the
output is
active
low, that is, when a fail
condition
is detected (not enough output power or too high
antenna
VSWR) the open
collector
transistor is turned on. In
linear
configuration, a
voltage
proportional
to the sensed output power or
antenna
VSWR is output.
Both the
Output
Power
Alarm
setpoint
and the VSWR
Alarm
setpoint
are
individually
adjustable;
however, the
Output
Power
Alarm
setpoint
must always be adjusted before the VSWR
Alarm
setpoint. This is because the
Output
Power
Alarm
setpoint
is used as a
reference
by the VSWR
Alarm
circuitry.
2.5.1 Output
Power Sense
The output power sense
circuitry
uses
directional
coupler TL3 to sample some of the forward
power.
The sampled power is
rectified
by diode D6 and
capacitor
C27 and then
amplified
by
op-amp
U3b.
Op-amp
U3b's
amplification
is
controlled
by R21, the output power
alarm
adjust
potentiometer.
The
amplified
voltage
is then output
directly
in
linear
operation
(JU1 installed, JU2
not
installed)
or
compared
to
+6.3
Vdc by op-amp U1a which then drives transistors Q5 and Q6
for open
collector
operatio
n (JU1 not installed, JU2 installed).
In open
collector
configuration, Q6 (the open
collector
output transistor) is turned on when an
alarm
condition
occurs. The
adjustment
range for the output power
alarm
can vary depending on
the
setting
of R21 (the
Output
Power
Alarm
Adjust
potentiometer).
DE
DANIELS
ELECTRONICS
2-4
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
2.5.2
VSWR Sense
The VSWR sense
circuitry
uses
directional
coupler TL4 to sample some of the power
reflected
from the
antenna
terminal. The
reflected
power is
rectified
by diode D7 and
capacitor
C33 and then
amplified
by op-amp
U2b.
Op-amp
U2b's
amplification
is
controlled
by R36, the VSWR
Alarm
Adjust
potentiometer.
The
amplified
voltage
is then output
directly
in
linear
operation
(JU4
installed, JU3 not
installed)
or
compared
to the output power
alarm
setpoint
by op-amp U3a which
then drives transistor Q7 for open
collector
operation
(JU4 not installed, JU3 installed).
In open
collector
configuration, Q7 (the open
collector
output transistor) is turned on when an
alarm
condition
occurs. The
adjustment
range for the VSWR
Alarm
can depending on the
setting
of R36 (the VSWR
Alarm
Adjust
potentiometer).
2.5.3 VSWR Overload
The VSWR overload
circuit
protects the UT-3/400
Amplifier
from excessive
antenna
VSWR by
reducing the amplifier's gain (output power) when an overload
condition
occurs. The VSWR
overload
circuit
(R38 to R41, R8,
U2a,
and Q4) is an extension of the VSWR sense
circuit
and
operates the same as the VSWR sense open
collector
circuit. The VSWR
Overload
Adjust
potentiometer
(R38) reduces the
voltage
level
of the VSWR
Alarm
Setpoint. The
voltage
set by
R38 is the
compared
to the output power
alarm
setpoint
by op-amp U2a which then drives
transistor Q4. When transistor Q4 turns on,
signaling
an overload condition, resistor R8 is
grounded which reduces the output power setpoint. Reducing the output power
setpoint
lowers the
UT-3/400 Amplifier's gain and protects the
amplifiers
from excessive current draw resulting from
high
antenna
VSWR.
The VSWR overload circuit's range of
adjustment
depends on the
setting
of the VSWR
Alarm
Adjust
potentiometer
(R36).
The VSWR overload transistor Q4 can be
activated
at the same point
at which the VSWR
alarm
becomes
active
or the VSWR overload
circuit
can be disabled by turning
R38
completely
counterclockwise.
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
3-1
3
UT-3/400 AMPLIFIER ALIGNMENT
3.1
General
Connections to the power supply,
alarm
and
transmit
enable
lines (ENA), are
clearly
marked on the
amplifier
case. The
amplifier
is
enabled
when the
enable
line (ENA) is grounded.
If the
amplifier
is
installed
in the transmitter,
alignment
is
simplified
by using an SR-3 Subrack,
SM-3 System Monitor, and RF
extender
cable
to provide
transmitter
power and signal
interconnection
(see the
Transmitter
Main
Board
Manual
for details). For
complete
transmitter
alignment, the
Transmitter
Main
Board, Synthesizer,
Amplifier,
and Audio Processor should be
tuned in the
aforementioned
order. Please refer the corresponding manuals for each module.
If the input RF
level
is not changed,
adjustments
to the output power and
alarm
thresholds may be
made without removing the
amplifier
cover.
However,
in the case of a
complete
amplifier
alignment, the
amplifier
should be
separated
from the
Transmitter
Main
Board and the
amplifier
cover removed to expose all
amplifier
circuitry.
All
jumpers and test points are
clearly
marked.
3.2 Repair Note
The UT-3/400
Transmitter
is
mainly
made up of surface mount devices which should not be
removed or
replaced
using an ordinary soldering iron.
Removal
and
replacement
of surface mount
components should be performed only with
specifically
designed surface mount rework and repair
stations
complete
with
ElectroStatic
Dissipative
(ESD) protection.
When removing Surface
Mount
Solder
Jumpers,
it is
recommended
to use solder braid in
place
of
manual
vacuum type desoldering tools when removing jumpers. This will help prevent
damage
to
the circuitboards.
3.3 Recommended Test Equipment List
Alignment
of the
transmitter
requires the following test
equipment
or its equivalent.
Dual
Power Supply:
Regulate
d
+9.5
Vdc at 0.1 A.
Regulated
+13.8
Vdc at 2 A - Topward TPS-4000
Oscilloscope
/
Multimeter:
Fluke 97
Scopemeter
Current
Meter:
Fluke 75
multimeter
Radio
communications
test set :
Marconi
Instruments 2955R
VSWR 3:1
mismatch
load:
JFW 50T-035-3.0:1
coaxial
test
cable
set three 50 cables of
incremental
length 20 to 40 cm
Alignment
Tool:
Johanson 4192
DE
DANIELS
ELECTRONICS
3-2
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
It is
recommended
that the radio
communications
test set be frequency locked to an
external
reference
(WWVH,
GPS,
Loran C) so that the high
stability
oscillator
may be
accurately
set to
within its ±1 ppm frequency tolerance.
3.4
Printed Circuitboard Numbering Convention
To ease
troubleshooting
and
maintenance
procedures,
Daniels
Electronics
Limited
has adopted a
printed
circuitboard
(PCB) numbering
convention
in which the last two digits of the
circuitboard
number represent the
circuitboard
version. For
example:
• PCB number 43-9120
10
indicates
circuitboard
version 1.0;
• PCB number 50002-
02
indicates
circuitboard
version
2.0.
All
PCB's
manufactured
by
Daniels
Electronics
are
identified
by one of the above conventions.
3.5
Standard Factory Settings and Jumper Configuration
The UT-3/400
Amplifier
is factory configured as follows:
• Open
collector
configuration
for
Output
Power
Alarm
(3 dB
drop).
• Open
collector
configuration
for
Antenna
VSWR
Alarm
(VSWR 3:1).
Output
power of 2 Watts or 6 Watts for low and high power
amplifiers
respectively.
The corresponding jumper settings are:
• Jumper JU1: not
installed
Output
power
alarm
-
linear
output
• Jumper JU2:
installed
Output
power
alarm
- open
collector
output
• Jumper JU3:
installed
Antenna
VSWR
alarm
- open
collector
output
• Jumper JU4: not
installed
Antenna
VSWR
alarm
-
linear
output
• Jumper JU5:
installed
Low power (2 W)
transmitters
• Jumper JU5: not
installed
High power (8 W)
transmitters
3.6 UT-3/400 Amplifier
Alignment
3.6.1 G
eneral
The UT-3/400
Amplifier
is a frequency
sensitive
module that is factory assembled to
operate
in one
of four frequency bands: 406 to 430 MHz, 450 to 470 MHz, 470 to 490 MHz or 490 to 512
MHz. The
amplifier
is
available
in a low power version, 0.5 to 2.0 Watts output
power,
and a
high power version, 2.0 to 8.0 Watts output
power.
Both
amplifier
versions require 5 dBm of
input power and in both versions the
amplifiers
output power is
continuously
adjustable
over the
its
respective
power range. The UT-3/400
Amplifier
provides
Output
Power and
Antenna
VSWR
Alarm
outputs which can be configured for open
collector
output or
linear
operation. The
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
3-3
amplifier's output power level,
alarm
levels, and tuning for the transistor
matching
circuit
in the
high power version can be set without
detaching
the
amplifier
from the
transmitter
board.
However,
if the output power
alarm
or the
Antenna
VSWR
alarm
output
configuration
requires
changing, the UT-3/400
Amplifier
must be
detached
from the MT-3
Transmitter
Board. Refer to
section 4 page 2 "UT-3/400
Amplifier
Component
Layout" for the
location
of solder jumpers JU1
to
JU5.
3.6.2
UT-3/400 A
mplifier
Adjustment
The
Amplifier
alignment
consists of two
adjustment
procedures; (i) a
general
set up (section
3.6.2.1)
procedure which sets up the proper bias
conditions
for the RF transistors and (ii) the RF
threshold
adjustments
which set up the desired
alarm
threshold levels as well as the RF output
power.
The
general
alignment
procedure is required following major repair operations, changes in
RF input levels or large changes in
operating
frequency
(greater
than ± 1.0 MHz).
The RF output and
alarm
threshold
level
adjustments
are more easily
accessible
so that fine
adjustments
can be made in the field.
Depending
on user requirements, the RF
alarm
threshold
levels should be
checked
whenever a
significant
change in
operating
frequency 0.5 MHz) is
made. As the
antenna
VSWR
alarm
is
dependent
on the output power alarm, the output power
alarm
should always be set first. The order of
adjustment
should be:
The
adjustment
procedures for the high power and the low power version
amplifiers
are
identical
after the
matching
for transistor Q1 is tuned in the high power version. As the
antenna
VSWR
alarm
is
dependent
on the output power alarm, the output power
alarm
should always be set first.
The order of
adjustment
should be:
1) High Power
Amplifiers
Only Tune the transistor
matching
circuit
at the
desired frequency and
power.
2) Set the desired output power
alarm
level
(section
3.6.2.2).
3) Set the desired output power
level
(section
3.6.2.3).
4) Set the desired
Antenna
VSWR
alarm
level
(section
3.6.
2.4).
5) Set the desired overload
condition
level
(section
3.6.2.5).
Details
for the
preceding
four steps are
outlined
below.
3.6.2.1
General Set-Up
1 Connect the transmitter's
antenna
output
connector
to the type N input of the radio
communications
test set through a short section of low loss 50
coaxial
cable.
2 Turn all four (4) of the
adjustment
potentiometers
(R7, R21, R36, and R38) fully
counterclockwise.
DE
DANIELS
ELECTRONICS
3-4
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
3 Turn on the power to the transmitter.
4 For high power
amplifier
units, follow steps 5 to 7 below. For low power amplifiers,
skip to the
Output
Power
Alarm
procedure.
5 Tune the output
matching
capacitor
for
maximum
output
power.
This should be
approximately
8 Watts.
6 For single frequency applications, tune the input
matching
capacitor
so that
+9.5
Vdc
current is
minimized
without
sacrificing
output
power.
For wideband
applications
it
is best to tune the
amplifier
at the highest frequency in the band of
interest
and then
tune the input
matching
capacitor
so that the
+9.5
Vdc current never exceeds 1.2
amps over the desired frequency band.
7 For single frequency applications, re-peak the output
matching
capacitor. For
wideband
applications
it is best to tune the
amplifier
at the highest frequency in the
band of
interest
and then re-peak the output
matching
capacitor
so that the
+13.8
Vdc
current never exceeds 1.5 amps over the desired frequency band.
3.6.2.2
Output Power Alarm (Forward Power)
Open
Collector
Output
*
note:
the output power
alarm
output is factory configured as an open
collector
output
so a pull-up resistor may be required on
transmitter
pin B26 if one is not
already
present.
1
Adjust
R7, the output power adjustment, to the output power at which the
Output
Power
Alarm
is to be
activated.
2
Monitor
transmitter
pin B26, the
Output
Power
Alarm
line, and slowly turn R21, the
output power
alarm
adjustment, clockwise
until
pin B26 goes low. The
alarm
is now
set for the current output power of the transmitter.
Linear
Output
1 Open the
amplifier
case to disable (open c
ircuit)
jumper JU2 and
enable
(short)
jumper
JU1.
2
Monitor
transmitter
pin B26 with a voltmeter.
3
Adjust
R7, the output power adjustment, for full
transmitter
output
power.
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
3-5
4
Adjust
R21, the output power
alarm
adjustment, so that the
voltmeter
indicates
+7.5
Vdc for full
transmitter
output
power.
5 Turn R7, the output power adjustment, fully counterclockwise. The
voltmeter
should
read
approximately
+3 Vdc.
6
Disconnect
the voltmeter.
3.6.2.3 Output Power
1 Turn R7, the output power adjustment, clockwise to the desired
transmitter
output
power.
3.6.2.4 Antenna VSWR Alarm (Reverse Power)
Open
Collector
Output
*
note:
the
antenna
VSWR
alarm
output is factory configured as an open
collector
output so a pull-up resistor may be required on
transmitter
pin Z26 if one is not
already
present. The output power
alarm
must be set first before the
antenna
VSWR
alarm
can be set.
1
Disconnect
the radio
communications
test and
terminate
the
transmitter
with the 3:1
mismatch
load.
2
Monitor
pin Z26, the
Antenna
VSWR
Alarm
line, and turn R36 fully
counterclockwise. Pin Z26 should be high. Slowly turn R36 clockwise
until
pin
Z26 is pulled low. Put the 50 ohm load back on again, Pin Z26 should go high. The
reverse power trip point is now set for a VSWR of 3:1.
Linear
Output
1 Open the
amplifier
case to disable (open
circuit)
jumper JU3 and
enable
(short)
jumper
JU4.
2
Monitor
transmitter
pin Z26 with a voltmeter.
3
Disconnect
the radio
communications
test set and
terminate
the
transmitter
with the
3:1
mismatch
load.
DE
DANIELS
ELECTRONICS
3-6
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
4
Adjust
R36, the VSWR
alarm
adjustment, so that the
voltmeter
indicates
+5 Vdc for a
3:1 mismatch.
5 Put the 50 ohm load back on again. The
voltmeter
should read
approximately
0 Vdc.
6
Disconnect
the voltmeter.
3.6.2.5 Antenna VSWR Overload
1
Disconnect
the radio
communications
test set and so that the
amplifier
is
terminated
with an open circuit.
2
Monitor
the current from the
+9.5
Vdc supply.
3
Adjust
R38, the VSWR overload adjustment, clockwise
until
a
noticeable
drop in the
+9.5
Vdc current occurs.
4
Reconnect
the radio
communications
test set and, the
+9.5
Vdc current should return
to the previous level.
3.6.2.6
Procedure Verification
1
Verify
that the current drawn from the
+13.8
Vdc supply is less than 1.5 A and from
the
+9.5
Vdc supply is less than 1.2 A when
transmitting
full 8 W RF output
power.
2 Turn off the power to the transmitter.
DE DANIELS
ELECTRONICS
4-1 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
4 ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
This Page Intentionally Left Blank
VICTORIA B.C .
DATE.:
DWG No:
TITLE:
DDANIELS
ELECTRONICS
BOARD No.:
DWG REV DATE:
NOVEMBER 9, 1993 43-931613
Components installed on bottom of board
+
Components mounted on case
9316A6A
M3 x 8 Screws
M2.5 x 6 Screws
M3 x 8 - M2.5 Cap Sock
D2
Q1
L7 L10
R15
FB1 FB2
L5
C17
L8
C20
L9
C24
C19
WIRE
TL5
UT-3/400 LOWPASS FILTER ASSEMBLY
TL2
TL2
Q2
U4
TL3
TL4
IRF9540
1N5402
MRF641
100R
SEL
150n
0.6p-3.5p
150n
4u7
0.6p-3.5p
SEL
16 AWG, RED
UT-3/400 AMPLIFIER TH DESIGNATIONS AND VALUES
VICTORIA B.C .
DATE.:
DWG No:
TITLE:
DDANIELS
ELECTRONICS
BOARD No.:
DWG REV DATE:
Factory installed jumpers
UT-3/400 AMPLIFIER SM LAYOUT
NOVEMBER 9, 1993 43-931613
9316A4
Not required for low power units
C15
R25
C9
R1
R2 R3
R4
L1 L3
L2 L4
C4 C6
C7
C8
C1 C3
C2
C5
TL1
D3
D4
Q3
R5
D1
R6
R7
R8
U1
R9
C10
C11
R10
C12 C13
D5 R14
R13
L6
R11
C16 C18
C21 C22 C23
C25
C26
TL3
TL4
R32 R17
D6
C27
R18
L11
C28 R19
C29 C30
R20
R21
U3
U2
R24 R22 R23
R44
C31
C36
R34 C35
R42 R43
D7 L12
C33 R33
C34 R35
Q4
R39 R41 R40
R38 R36
R37
Q7
Q6
JU4
JU3
JU2JU1
R28
R29
R31
Q5 R30
R27
R26
C32
C14
JU5
R12
9316A5
1n
SEL
49k9
180n 180n
180n 180n
18n 18n
4u7
4u7
18n 18n
18n
18n
DIRECTIONAL
COUPLER
BYD17J
BYD17J
D5P06V
4k53
MBZ5233B
4k53
50k
27k4
33172
10k0
10n
100n
10k0
100n 10n
MMBD701 49R9
22k6
1u5
49k9
10k0
100n 10n 1n
DIRECTIONAL
COUPLER
DIRECTIONAL
COUPLER
49R9 49R9
MMBD701
150p
SEL
1u5
10n SEL
100n 10n
10k0
50k
33172
1k00 49k9 49k9
10k0
10n
10n
SEL 100n
1k00 27k4
MMBD701 1u5
150p SEL
10n 10k0
BC817
1k00 10k0
50k 50k
1k00
PZT2222A
PZT2222A
1k00
27k4
10k0
10k0
BC817 49k9
100k
49k9
10n
150p
33172
N/I
15p N/I
SEL
SEL
SEL SEL
UT-3/400 AMPLIFIER SM DESIGNATIONS AND VALUES
10n
MMBD701
4.1 UT-3/UT-4 UHF Amplifier Component Layout
4-2
DE DANIELS
ELECTRONICS
UT3AMPM1A
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
Q2
IRF9540
D2
1N5402
TL5
MMBD701
WIRE
C37
10nF
C38
10u
+
OUTPUT POWER SELECT VALUES
COMPONENT
R18
0.5 - 2.0 Watts 2.0 - 8.0 Watts
R19
R33
R34
39k2
49k9
4k53
49k9
49k9
22k6
49k9
39k2
C25* 7.5 pF 4.7 pF
C26* 4.7 pF 3.0 pF
denotes components only installed on high power (2.0 - 8.0 Watt) units.
FREQUENCY BAND SELECT VALUES
COMPONENT 406 - 430 MHz 450 - 470 MHz
C19* 47 pF 39 pF
U4 MHW707-1 MHW707-2
NOTE: *
3.0 pF
3.0 pF3.0 pF
Not Installed
470 - 495 MHz 495 - 512 MHz
30 pF 30 pF
MHW707-3 MHW707-4
UT-3 / UT-4 SELECT VALUES
COMPONENT
R1
UT-3 406-470 UT-4 406-470
R2
R3
12k1
422R
422R
-
0R0
NOT INSTALLED
NOT INSTALLED
-
-
VICTORIA B.C.
DE DANIELS
ELECTRONICS
DE DANIELS
ELECTRONICS
DWG REV DATE: 19 OCTOBER 1998DWG No: UT3AMPM2B
TITLE: UT-3/UT-4 AMPLIFIER SCHEMATIC DIAGRAM
4.2 UT-3/UT-4 UHF Amplifier Schematic Diagram
4-3
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
C38 D7
APRVD:DATE: 23 JANUARY 1991 DWN BY: MICHAEL GAUBE
BOARD No: 43-931613 BOARD REV: VERSION 1.3
ANTENNA
VSWR
ALARM
OUTPUT POWER
ALARM ADJUST
VSWR
OVERLOAD
ADJUST
R16
U4TL5
R44Q7L12
JU5J2FIL5
FB2
OVERLOAD VSWR ALARM SETPOINT
UNUSED REFERENCE DESIGNATORS
HIGHEST REFERENCE DESIGNATION
RF IN
OUTPUT POWER
SETPOINT
OUTPUT
POWER
ADJUST
OUTPUT
POWER
ALARM
+13.8 VDC
AMPLIFIER
ENABLE INPUT
+9.5 VDC
RF OUT
VSWR
ALARM
ADJUST
OUTPUT POWER
ALARM SETPOINT
2 dB PAD
R9
10k0
C2
18nF
C10
10nF
R7
50k
R5
4k53
R10
10k0
C11
100nF
DS
Q3
D5P06V
R3
SEL
R1
SEL
R4
49k9
D2
IN5402
LPF
FIL1
LPF
FIL2
LPF
FIL3
C9
1nF
C1
18nF
C3
18nF
C5
18nF
C6
18nF
C4
18nF
+ C7
4.7uF
L1
180nH
DS
Q2
IRF9540
R6
4k53
D4
BYD17J
R2
SEL
D3
BYD17J
L3
180nH
L4
180nH
L5
150nH
R35
10k0
C34
10nF
Q7
PZT2222A
R44
10k0
R36
50k
C33
150pF
R33
SEL
R42
1k00
R43
27k4
R23
49k9
C31
10nF
C36
10nF
6
5
8
7
4
U2b
MC33172
D7
MMBD701
R22
49k9
R20
10k0
R19
SEL
C28
10nF
C27
150pF
R18
SEL
L11
1.5uH
D6
MMBD701
Q5
BC817-25 R29
10k0 R25
1k00
R28
27k4
Q4
BC817-25
R41
10k0
R39
1k00
R27
100k
C32
10nF
R26
49k9
R30
49k9
Q6
PZT2222A
R31
10k0
R38
50k
R37
1k00
JU1
JU4
R24
1k00
2
3
1
MC33172
U3a
2
3
1
MC33172
U2a
6
5
8
7
4
U3b
MC33172
C29
100nF
C30
10nF
LPF
FIL4 JU2
LPF
FIL5 JU3
C35
100nF
R21
50k
L6*
1.5uH
C14*
150pF
D5*
MMBD701
L2
180nH
R40
Not Installed
TL3
DIRECTIONAL COUPLER
TL4
DIRECTIONAL COUPLER
R17
49R9
R32
49R9
J2
TL5
CONFORMABLE
COAX
LPF
LOWPASS FILTER
MHW 707
MHW707-SEL
U4
JU5
C12
100nF
C13
10nF
2
3
4
1
8
U1a
MC33172
6
5
7
MC33172
U1b
L12
1.5uH
R11
10k0
R12*
49k9
R13*
22k6
C15*
10nF
R8
27k4
R34
SEL
TO ALL SWITCHED
+9.5V
+13.8 VDC
SWITCHED
+9.5V
SWITCHED+9.5V
SWITCHED
+9.5V
SWITCHED
+9.5V
SWITCHED
+9.5V
Q1*
MRF641
+13.8 VDC
+ C8
4.7uF
TL2
CONFORMABLE
COAX
L9*
5.0 TURN
C16*
15pF
FB1*
C19*
SEL
C26*
SEL
+
C20*
4.7uF
C22*
10nF
C21*
100nF
C23*
1nF
L7*
0.75 TURN
L10*
1 TURN
FB2*
R15*
100R
TL1*
DIRECTIONAL COUPLER
R14*
49R9
C25*
SEL
SEL
C18*
C24*
0.6-3.5pF
L8*
150nH
C17*
0.6-3.5pF
D1
MBZ5233B
C37
10nF
10uF
C38
SMB
J1
DE DANIELS
ELECTRONICS
4-4 UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
This Page Intentionally Left Blank
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
4-5
4.3
UT-3/400 UHF Lowpass Filter Componen
t Layout
4.4 UT-3/400 UHF Lowpass Filter Schematic Diagram
DE
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ELECTRONICS
4-6
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
This Page Intentionally Left Blank
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
5-1
5 PARTS LISTS
5.1
UT-3 / UT4
UHF Amplifier Electrical Parts List
NOTE:
Reference
Designators
labeled
with an asterisk (*) are used only in 2.0 - 8.0 Watts amplifiers.
Ref
Desig Description Part No.
C1-C6
CAP.,
SM,
18nF
CER,
1206, X7R 1008-4B183K5R
C7,
C8
CAP.,
SM,
4.7µF
TANT., 10%, 16V
1055-5B475K16
C9
CAP.,
SM,
1nF
CER,
1206, C0G
1008-3B102K1G
C10
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C11,
C12
CAP.,
SM,
100nF
CER,
1206, X7R 1008-5B104K5R
C13
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C14*
CAP.,
SM,
150pF
CER,
1206, C0G
1008-2B151J1G
C15*
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C16*
CAP.,
SM,
15pF
PORCEL.,
±5%,
500V 1036-1B2150J5
C17*
CAP.
TRIM,
0.6-3.5pF
VERT.,
>9T 1082-C0R6003G
C18*
CAP.,
SM,
NOT INSTALLED NOT INSTALLED
C19*
CAP.,
SM,
47pF
PORCEL.,
±5%,
500V 1036-1B2470J5 (406-430 MHz)
C19*
CAP.,
SM,
39pF
PORCEL.,
±5%,
500V 1036-1B2390J5 (450-470 MHz)
C19*
CAP.,
SM,
30pF
PORCEL.,
±5%,
500V 1036-1B2300J5 (470-490 MHz)
C19*
CAP.,
SM,
30pF
PORCEL.,
±5%,
500V 1036-1B2300J5 (490-512 MHz)
C20*
CAP.,
4.7µF
DIP. TANT., 10%, 35V 1054-5E475K35
C21*
CAP.,
SM,
100nF
CER,
1206, X7R 1008-5B104K5R
C22*
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C23*
CAP.,
SM,
1nF
CER,
1206, C0G
1008-3B102K1G
C24*
CAP.
TRIM,
0.6-3.5pF
VERT.,
>9T 1082-C0R6003G
C25*
CAP.,
SM,
7.5pF
PORCEL.,
±0.25pF
1036-0B2759C5 (406-430 MHz)
C25*
CAP.,
SM,
4.7pF
PORCEL.,
±0.25pF
1036-0B2479C5 (450-470 MHz)
C25*
CAP.,
SM,
3.0pF
PORCEL.,
±0.25pF
1036-0B2309C5 (470-490 MHz)
C25*
CAP.,
SM,
NOT INSTALLED NOT INSTALLED (490-512 MHz)
C26*
CAP.,
SM,
4.7pF
PORCEL.,
±0.25pF
1036-0B2479C5 (406-430 MHz)
C26*
CAP.,
SM,
3.0pF
PORCEL.,
±0.25pF
1036-0B2309C5 (450-470 MHz)
C26*
CAP.,
SM,
3.0pF
PORCEL.,
±0.25pF
1036-0B2309C5 (470-490 MHz)
C26*
CAP.,
SM,
3.0pF
PORCEL.,
±0.25pF
1036-0B2309C5 (490-512 MHz)
C27
CAP.,
SM,
150pF
CER,
1206, C0G
1008-2B151J1G
C28
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C29
CAP.,
SM,
100nF
CER,
1206, X7R 1008-5B104K5R
C30-C32
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C33
CAP.,
SM,
150pF
CER,
1206, C0G
1008-2B151J1G
C34
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C35
CAP.,
SM,
100nF
CER,
1206, X7R 1008-5B104K5R
C36
CAP.,
SM,
10nF
CER,
1206, X7R 1008-4B103K5R
C37
CAP.,
10nF
FILM,
MMK5, 10%,63V 1016-4A103K63
C38
CAP.,
10µF
DIP. TANT., 20%, 25V 1054-6E106M25
D1 DIODE, MBZ5233B 6.0V ZENER, SOT-23
2102-MBZ5233B
D2 DIODE, IN5402 3A
RECT,
DO-201AD 2001-1N540200
D3, D4 DIODE, BYD17J R
ECTIFIER,
SOD-87
2101-BYD17J00
D5* DIODE, MMBD701 HOT
CARRIER,
SOT-23 2105-MMBD7010
D6, D7 DIODE, MMBD701 HOT
CARRIER,
SOT-23 2105-MMBD7010
DE
DANIELS
ELECTRONICS
5-2
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
Ref
Desig
Description
Part
No.
FB1* FERRITE BEAD, 64 MIX 3x3.5 mm OD 1210-64030350
FB2* FERRITE BEAD, 64 MIX 3x3.5 mm OD 1210-64030350
FIL1, 2
FILTER,
EMI
PI/5500pF,
8-32 UNC 1302-P552D10D
FIL3*
FILTER,
EMI
PI/5500pF,
8-32 UNC 1302-P552D10D
FIL4, 5
FILTER,
EMI
PI/5500pF,
8-32 UNC 1302-P552D10D
J1
CONN.,
SMB, JACK,2 HOLE FLANGE 5120-J2SC01BG
J2 CONNECTOR, N JACK PANEL MNT,
C/SNK
5184-10923011
L1-L4 INDUCTOR,
SM,
180nH 20%, 1812 1255-2GR1800M
L5 CHOKE
RF/MOLDED,
150nH 10%, 0.37 1251-2B00R15K
L6* INDUCTOR,
SM,
1.5µH
10%, 1812 1255-3G1R500K
L7* COIL, 0.75 TURN 16AWG, 4.0 mm ID $1220-0T751615
L8* CHOKE
RF/MOLDED,
150nH 10%, 0.25 1251-2A00R15K
L9*
COIL/RF,
5.0 TURN 18AWG, 0.18"ID $1220-5T001817
L10* COIL, 1 TURN 16AWG, 4.0 mm ID $1220-1T001617
L11, L12 INDUCTOR,
SM,
1.5µH
10%, 1812 1255-3G1R500K
Q1*
TRANSISTOR,
MRF641
470 MHz, 15W 2025-MRF64100
Q2 MOSFET, IRF9540 P-CHANNEL, TO-220 2044-IRF95400
Q3
MOSFET,
D5P06V P-CHANNEL, DPAK 2144-D5P06V00
Q4, Q5
TRANSISTOR,
BC817-25 NPN, SOT-23 2120-BC817025
Q6, Q7
TRANSISTOR,
PZT2222A NPN, SOT-223 2120-PZT2222A
R1
RES.,
SM,
12R1 1206, 1%, 100ppm 1150-1B12R1FP (UT-3 406-470 MHz)
R1
RES.,
SM,
ZERO OHM
JUMPER,1206
1150-0B0R0000 (UT-4 406-470 MHz)
R2,
R3
RES.,
SM,
422R 1206, 1%, 100ppm 1150-2B4220FP (UT-3 406-470 MHz)
R2,
R3 NOT INSTALLED NOT INSTALLED (UT-3 406-470 MHz)
R4
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R5,
R6
RES.,
SM,
4k53 1206, 1%, 100ppm 1150-3B4531FP
R7
POT.,
SM,
50k 12 TURN, SIDE ADJUST 1172-M30503X5
R8
RES.,
SM,
27k4 1206, 1%, 100ppm 1150-4B2742FP
R9-R11
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R12*
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R13*
RES.,
SM,
22k6 1206, 1%, 100ppm 1150-4B2262FP
R14*
RES.,
SM,
49R9 1206, 1%, 100ppm 1150-1B49R9FP
R15*
RES.,
100R METAL
FILM,
5%, 2W 1105-2A0101JI
R16 UNUSED
REFERENCE
DESIGNATION
R17
RES.,
SM,
49R9 1206, 1%, 100ppm 1150-1B49R9FP
R18
RES.,
SM,
39k2 1206, 1%, 100ppm 1150-4B3922FP (0.5 - 2.0 Watts)
R18
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP (2.0 - 8.0 Watts)
R19
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP (0.5 - 2.0 Watts)
R19
RES.,
SM,
22k6 1206, 1%, 100ppm 1150-4B2262FP (2.0 - 8.0 Watts)
R20
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R21
POT.,
SM,
50k 12 TURN, SIDE ADJUST 1172-M30503X5
R22,R23
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R24,R25
RES.,
SM,
1k00 1206, 1%, 100ppm 1150-3B1001FP
R26
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R27
RES.,
SM,
100k 1206, 1%, 100ppm 1150-5B1003FP
R28
RES.,
SM,
27k4 1206, 1%, 100ppm 1150-4B2742FP
R29
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
5-3
R30 R
ES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R31
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
Ref
Desig
Description
Part
No.
R32
RES.,
SM,
49R9 1206, 1%, 100ppm 1150-1B49R9FP
R33
RES.,
SM,
4k53 1206, 1%, 100ppm 1150-3B4531FP (0.5 - 2.0 Watts)
R33
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP (2.0 - 8.0 Watts)
R34
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP (0.5 - 2.0 Watts)
R34
RES.,
SM,
39k2 1206, 1%, 100ppm 1150-4B3922FP (2.0 - 8.0 Watts)
R35
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R36 POT.,
SM,
50k 12 TURN, SIDE ADJUST 1172-M30503X5
R37
RES.,
SM,
1k00 1206, 1%, 100ppm 1150-3B1001FP
R38
POT.,
SM,
50k 12 TURN, SIDE ADJUST 1172-M30503X5
R39
RES.,
SM,
1k00 1206, 1%, 100ppm 1150-3B1001FP
R40
RES.,
SM,
NOT INSTALLED NOT INSTALLED
R41
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R42
RES.,
SM,
1k00 1206, 1%, 100ppm 1150-3B1001FP
R43
RES.,
SM,
27k4 1206, 1%, 100ppm 1150-4B2742FP
R44
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
TL1* COAX, DIRECTIONAL COUPLER 0.5" 7496-30CR005T
TL2 COAX, CONFORMABLE 50 OHM,
0.083",
60 mm 7482-5024T083
TL3, TL4 COAX, DIRECTIONAL COUPLER 0.5" 7496-30CR005T
TL5 COAX, CONFORMABLE 50 OHM,
0.083",
29 mm 7482-5024T083
U1-U3
I.C.,
MC33172 DUAL OP
AMP,
S0-8 2302-33172N08
U4
AMP,
RF,
MHW707-1 7W, 403-440 MHz 2257-MHW70701 (406-430 MHz)
U4
AMP,
RF,
MHW707-2 7W, 440-470 MHz 2257-MHW70702 (450-470 MHz)
U4
AMP,
RF,
MHW707-3 7W, 470-500 MHz 2257-MHW70703 (470-490 MHz)
U4
AMP,
RF,
MHW707-4 7W, 490-512 MHz 2257-MHW70704 (490-512 MHz)
PCB UT-3/400 AMPLIFIER 4323-15931613
LPF UT-3/400 LOWPASS FILTER ASSEMBLY A23-LPF-3
DE
DANIELS
ELECTRONICS
5-4
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
5.2
UT-3/400 UHF
Amplifier Mechanical Parts List
Description Part No. Qty.
CAP
SCREW,
8-32 X
1/4,
HEX
BUTTON
- 9/64 5806-832BH04S 1 (0.5 - 2.0 Watts)
CASE,
MT-3 VHF/UHF
AMPLIFIER,
ALUMINUM
3702-66102130 1
HEATSHRINK, 1/8" DIA, RED, 1" LENGTH CONSUMABLE 1 (2.0 - 8.0 Watts)
INSULATOR, THERM. COND. TO-220 5622-1T220701 1
LABEL, IDENTIFICATION/TEST, FOIL CONSUMABLE 1
LID, CASE MT-3
AMPLIFIER,
ALUMINUM
3702-66102151 1
SCREW,
M2 X 6,
PAN/PHIL.,
A2 5812
-2M0PP06S
2
SCREW,
M2 X 4,
PAN/PHIL.,
A2
5812-2M0PP04S
10
SCREW,
M2.5
X 6,
PAN/PHIL.,
A2
5812-2M5PP06S
3
SCREW,
M3 X 6,
FLAT/PHIL.,
A2
5812-3M0FP06S
4
SCREW,
M3 X 8,
PAN/PHIL.,
A2
5812-3M0PP08S
9
SCREW,
M3 X 8,
CAP
SOCK-M2.5 5816-3M0SH08S 4 (0.5 - 2.0 Watts)
SCREW,
M3 X 8,
CAP
SOCK-M2.5 5816-3M0SH08S 6 (2.0 - 8.0 Watts)
SET
SCREW,
M3 X 3, HEX
SOCKET,
A2 5817-3M0AC03S 1
SHOULDER WASHER, M3 0.24" OD, NYLON 5674-120N2440 1
TURRET TERMINAL, 4-40
0.188L,
Tn 5053-144M188T 1
WIRE, PVC/STRANDED 16AWG, RED, 70 mm 7110-16S26302 1 (2.0 - 8.0 Watts)
5.3 UT-3/400 UHF Low Pass Filter Electrical Parts List
Ref
Desig Description Part No.
C1
CAP.,
SM,
7.5pF
PORCEL,
±0.25
pF 1036-0B2759C5
C2-C4
CAP.,
SM,
15pF
PORCEL,
±5%,
500V 1036-1B2150J5
C5
CAP.,
SM,
7.5pF
PORCEL,
±0.25
pF 1036-0B2759C5
L1 - L4 COIL, 2 TURNS 16 AWG BELD, 4.0 mm ID 1220-2T001622
PCB
PCB,
LPF,
VT-3/150 & UT-3/400 4321-16931712
DE
DANIELS
ELECTRONICS
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
6-1
6
REVISION HISTORY
ISSUE
DATE
REVISION
1
October
98 First
Issue.
DE
DANIELS
ELECTRONICS
6-2
UHF Amplifier Instruction Manual UT-3 406 - 512 MHz
ISSUE
DATE
REVISION

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