Ramsey Electronics manual QRP20 20 Meter CW Transmitter KIT

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Ramsey Publication No. QRP20

Price $5.00

KIT ASSEMBLY

AND INSTRUCTION MANUAL FOR

QRP20 20 METER CW TRANSMITTER KIT

TABLE OF CONTENTS

Introduction to the QRP20	4
Understanding Power Levels	5
QRP20 Circuit Description	7
Block Diagram	8
Parts List	9
Schematic Diagram	10
Parts Layout Diagram	11
QRP20 Assembly Instructions	12
Crystal Oscillator Testing	16
Initial Tests	17
Verifying RF Power	18
Maximizing RF Power Output	19
Options for Finishing Project	20
Enclosure Ideas	20
Choosing Crystals	20
Troubleshooting Guide	21
Ramsey Kit Warranty	22

RAMSEY ELECTRONICS, INC.

590 Fishers Station Drive

Victor, New York 14564

Phone (585) 924-4560

Fax (585) 924-4555

QRP-20 • 3

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Contents CW Transmitter Ramsey Transmitter Kits QRP20 20 Meter CW Transmitter KIT Introduction Watts vs 1 Watt Understanding the Difference QRP-20 Circuit Description WHO should USE a QRP TRANSMITTER?Block Diagram Capacitors Parts Supplied with QRP20 Transmitter KITQRP-20 QRP20 Parts Layout Diagram First Assembly Steps LEARN-AS-YOU-BUILD Transmitter Assembly StrategyQRP-20 Building the VXO Variable Crystal Oscillator Halftime Suggestion Crystal Oscillator Testing Further AssemblyBuffer and RF Amplifier Wiring Initial Tests Your Power Supply and RF Output PowerVerifying Transmitter RF Output TRANS-RECEIVE Operation Maximizing RF Power OutputOther Enclosure Recommendations Ramsey Electronics CASE, Knob & Hardware OptionFinal Considerations Troubleshooting GuideQRP-20 Ramsey Kit Warranty Ramsey Model NO. QRP20 Meter CW Transmitter KIT