User Manual
Table Of Contents
- 1GENERAL
- 1.1Introduction
- 1.2Performance Specification
- 2THEORY OF OPERATION
- 2.1Amplifier Operation
- 2.2Power Requirements
- 2.3RF Circuitry
- 2.3.1UT-3/400 Lowpass Filter
- 2.4Power Control Circuitry
- 2.5Power Sensing Circuitry
- 2.5.1Output Power Sense
- 2.5.2VSWR Sense
- 2.5.3VSWR Overload
- 3UT-3/400 AMPLIFIER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Recommended Test Equipment List
- 3.4Printed Circuitboard Numbering Convention
- 3.5Standard Factory Settings and Jumper Configuration
- 3.6UT-3/400 AmplifierAlignment
- 3.6.1General
- 3.6.2UT-3/400 Amplifier Adjustment
- 3.6.2.1General Set-Up
- 3.6.2.2Output Power Alarm (Forward Power)
- 3.6.2.3Output Power
- 3.6.2.4Antenna VSWR Alarm (Reverse Power)
- 3.6.2.5Antenna VSWR Overload
- 3.6.2.6Procedure Verification
- 4ILLUSTRATIONS AND SCHEMATIC DIAGRAMS
- 4.1UT-3/400 UHF Amplifier Component Layout
- 4.2UT-3/400 UHF Amplifier Schematic Diagram
- 4.3UT-3/400 UHF Lowpass Filter Component Layout
- 4.4UT-3/400 UHF Lowpass Filter Schematic Diagram
- 5PARTS LISTS
- 5.1UT-3 / UT4 UHF Amplifier Electrical Parts List
- 5.2UT-3/400 UHF Amplifier Mechanical Parts List
- 5.3UT-3/400 UHF Low Pass Filter Electrical Parts List
- 6REVISION HISTORY

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