Ramsey Electronics manual HR20 Amateur Receiver KIT

Page 3

Ramsey Publication No. MHR20

Price $5.00

KIT ASSEMBLY

AND INSTRUCTION MANUAL FOR

HR20 AMATEUR

RECEIVER KIT

TABLE OF CONTENTS

Introduction to the HR20	4
About Direct Conversion	5
Circuit description	6
Parts list	7
Schematic diagram	9
Parts layout	10
Assembly instructions	11
Initial testing	14
Alignment	15
Using your HR20	16
Troubleshooting guide	19
Notes for experienced users	20
Warranty	26

HR20• 3

Image 3

Contents ALL Mode Receiver KIT Partial List of Available Kits Ramsey Transmitter Kits HR20 Amateur Receiver KIT Ramsey HR-SERIES Amateur Receivers IntroductionAbout Direct Conversion Receivers Circuit Description Parts Supplied with the HR20 KIT CapacitorsLEARN-AS-YOU-BUILD Receiver Assembly Strategy HR20 HR20 Parts Layout Diagram Receiver Assembly HR20 HR20 Required for Initial Testing and Alignment Initial Testing of Your HR20Alignment Hint for ALL Direct Conversion Receivers AlignmentOn the AIR TRANS-RECEIVING Using Your ReceiverTuning SSB Signals CW OperationSpeaker Operation Adding AN LED Power on Indicator More Audio Power Another WAYTroubleshooting Tips General Notes for Experienced QRP Builders Alternate Power SourcesBandspread and Tuning Range Frequency Stability Other Methods of Dial CalibrationDirect Frequency Readout LM386 Audio Output HR20 Construction Notes Ramsey Kit Warranty Factory Repair of Assembled Kits Additional Suggested Items Total Solder Points Estimated Assembly TimeHR20 Amateur Receiver KIT Required Tools