Icom AH-4 - User Manual

Inside the Icom AH-4 Tuner!
This paper describes the Icom AH-4 wide range antenna tuner. It attempts to compensate for a rather
sparse instruction manual by providing information on how to interface the AH-4 with any HF radio. In
addition, it also provides recommendations regarding antennas for fixed locations. An overview and
description is presented as well. Those who are interested in antenna tuners (the AH-4 in particular)
and those who just plain like to look into the guts of hardware and see how things work will want to
read on.!
Chris, K9EQ!
Table of Contents
Table of Contents" 1!
1. Overview" 2!
2. AH-4 Design" 3!
3. Inside the AH-4" 4!
4. AH-4 Radio Interface Operation" 6!
5. Electrical Interface" 8!
6. Revision History" 8
AH-4 Operation
K9EQ
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Icom AH-4 Specifications

General

Brand	Icom
Model	AH-4
Category	Tuner
Language	English

Summary

Icom AH-4 Tuner Overview

Icom AH-4 Tuner Design and Block Diagram

Icom AH-4 Tuner Internal View and Balanced Antenna Use

Icom AH-4 Tuner Radio Interface and Operation Sequence

Icom AH-4 Tuner Electrical Interface Details

Icom AH-4 Tuner Revision History