User Manual
Table Of Contents
- 1GENERAL
- 1.1Introduction
- 1.2Performance Specification
- 2THEORY OF OPERATION
- 2.1Amplifier Operation
- 2.2Power Requirements
- 2.3RF Circuitry
- 2.3.1VT-3/150 Lowpass Filter
- 2.4Power Control Circuitry
- 2.5Power Sensing Circuitry
- 2.5.1Output Power Sense
- 2.5.2VSWR Sense
- 2.5.3VSWR Overload
- 3VT-3/150 AMPLIFIER ALIGNMENT
- 3.1General
- 3.2Repair Note
- 3.3Recommended Test Equipment List
- 3.4Printed Circuitboard Numbering Convention
- 3.5Standard Factory Settings and Jumper Configuration
- 3.6VT-3/150 AmplifierAlignment
- 3.6.1General
- 3.6.2VT-3/150 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
- 4.1VT-3/150 VHF Amplifier Component Layout
- 4.2VT-3/150 VHF Amplifier Schematic Diagram
- 4.3VT-3/150 VHF Lowpass Filter Component Layout
- 4.4VT-3/150 VHF Lowpass Filter Schematic Diagram
- 5PARTS LISTS
- 5.1VT-3/150 Amplifier Electrical Parts List
- 5.2VT-3/150 Low Pass Filter Electrical Parts List
- 5.3VT-3/150 Amplifier Mechanical Parts List
- 6REVISION HISTORY
DE
DANIELS
ELECTRONICS
5-2
VHF Amplifier Instruction Manual VT-3 132 - 174 MHz
2
Ref
Desig Description Part No.
FB1 FERRITE BEAD,
SM,
43 MIX 1812 PKG 1213-43181200
FB2, FB3 FERRITE BEAD, 64MIX
3X3.5mm
OD 1210-64030350
FIL1-FIL5
FILTER,
EMI
PI/5500pF,
8-32 UNC 1302-P552D10D
J1 CONNECTOR, SMB, JACK,2 HOLE FLANGE 5120-J2SC01BG
J2 CONNECTOR, N JACK PANEL MNT, C/SNK 5184-10923011
L1-L3 INDUCTOR,
SM.,
180nH 20%, 1812 1255-2GR1800M
L4 CHOKE,
RF/MOULD.,
150nH 10%, .37 1251-2B00R15K
L5 INDUCTOR,
SM,
1.5µH
10%, 1812 1255-3G1R500K
L6, L7 INDUCTOR,
SM,
1.5µH
10%, 1812 1255-3G1R500K
L8 COIL, 1.5
TURNS,
18AWG, 3.83mmID 1220-1T501812
L9 CHOKE,
RF/MOULD.,
150nH 10%, .25 1251-2A00R15K
L10 CHOKE,
RF/MOULD.,
150nH 10%, .37 1251-2B00R15K
L11 COIL, 1.5
TURNS,
18AWG, 3.83mmID 1220-1T501812
LPF1
LPF,
ASSEMBLY VT-3/150 AMPLIFIER A21-LPF3/150
PCB
PCB,
VT-3/150 TX AMPLIFIER 4321-15932611
Q1
MOSFET,
IRF9540 P-CHANNEL, TO-220 2044-IRF95400
Q2
MOSFET,
D5P06V
P-CHAN.,
DPAK 2144-D5P06V00
Q3
TRANSISTOR,
PZT2222A NPN, SOT-223 2120-PZT2222A
Q4
TRANSISTOR,
BC817-25 NPN, SOT-23 2120-BC817025
Q5
TRANSISTOR,
PZT2222A NPN, SOT-223 2120-PZT2222A
Q6
TRANSISTOR,
BC817-25 NPN, SOT-23 2120-BC817025
Q7 TRANSI
STOR,
MRF262
VHF, TO-220 2025-MRF26200
R1
RES.,
SM,
30R1 1206, 1%,100ppm 1150-1B30R1FP
R2,
R3
RES.,
SM,
178R 1206, 1%,100ppm 1150-2B1780FP
R4
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R5
RES.,
SM,
4k53 1206, 1%, 100ppm 1150-3B4531FP
R6
RES.,
SM,
27k4 1206, 1%, 100ppm 1150-4B2742FP
(Default)
R6
RES.,
SM,
392k 1206, 1%, 100ppm 1150-4B3922FP (Exciter for VT-30)
R7
POT.,
SM,
50k 12 TURN, SIDE ADJUST 1172-M30503X5
R8
RES.,
SM,
3k48 1206, 1%, 100ppm 1150-3B3481FP
R9-R11
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R12,
R13
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R14
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R15-R17
RES.,
SM,
49R9 1206, 1%, 100ppm 1150-1B49R9FP
R18,
R19
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
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,
R27
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R28
RES.,
SM,
27k4 1206, 1%, 100ppm 1150-4B2742FP
R29
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R30
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R31,
R32
RES.,
SM,
10k0 1206, 1%, 100ppm 1150-4B1002FP
R33,
R34
RES.,
SM,
49k9 1206, 1%, 100ppm 1150-4B4992FP
R35
RES.,
SM,
1k00 1206, 1%, 100ppm 1150-3B1001FP
R36,
R37
POT.,
SM,
50k 12 TURN, SIDE ADJUST 1172-M30503X5