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AH-4
Service manual
Table Of Contents - Icom AH-4 Service Manual
Hf+50 mhz automatic antenna tuner
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Service manual
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Manual
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Instructions
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Table of Contents
Introduction
2
Danger
2
Ordering Parts
2
Repair Notes
2
Table Of Contents
3
Specifications
4
Inside Views
5
Top View
5
Side View
5
Circuit Description
6
General
6
Forward (Fwd) Power Detector Circuit
6
Swr Detector Circuit
6
Phase Detector Circuit
7
Impedance Detector Circuit
7
Logic Circuit
7
Adjustment Procedures
8
Preparation
8
Required Test Equipment
8
Connections
8
Antenna Tuner Adjustment
9
Parts List
11
Tuner Unit
11
Mechanical Parts And Disassembly
14
Chassis Parts
14
Accesories
14
Screw Abbreviations
14
Parts View
15
Semi-Conductor Information
16
Transistor And Fet's
16
Diodes
16
Board Layout
17
Schematic Diagram
18
Block Diagram
19
Transceiver
19
Voltage Diagram
20
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