QRP PROJECT ZM-4 - User Manual

1
DL-QRP-AG
© QRPproject Molchstr. 15 12524 Berlin Alt-Glienicke http://www.QRPproject.de Telefon: +49(30) 85 96 13 23 e-mail: support@QRPproject.de
Handbucherstellung: Peter Zenker DL2FI email:dl2fi@qrpproject.de
ZM-4 ATU for symmetrical and unsymmetrical Antennas
Please read the manual compleate for better understanding before you start assembling
Manual Version 1.3UK

Summary

ZM-4 ATU for Symmetrical and Unsymmetrical Antennas

The Z-Match Principle

Explains the Z-Match circuit, bandpass characteristic, and SWR measurement capabilities.

Assembling the ZM4

Provides detailed instructions for building the ZM4 ATU, including toroid winding and PCB assembly.

Front Panel Connectors and Switches

Switch and Capacitor Functions

Details the operation of front panel controls like SW4, C1, C2, S1, and S3 for tuning and band selection.

Backplane Connections and Switches

Rear Panel Component Descriptions

Describes rear panel connectors (BNC IN) and switches (S2, S5) for antenna type and impedance selection.

Circuit Schematic and Component Layout

ZM-4 Circuit Diagram

Illustrates the complete circuit diagram of the ZM-4 ATU, showing component connections and signal flow.

QRP PROJECT ZM-4 Specifications

General

Brand	QRP PROJECT
Model	ZM-4
Category	Tuner
Language	English