Ramsey Electronics
HR20
manual
Troubleshooting
HR20 Parts Layout Diagram
Tuning SSB Signals
Warranty
Receiver Assembly
Bandspread and Tuning Range
Initial Testing of Your HR20
More Audio Power Another WAY
ALL Mode Receiver KIT
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Contents
ALL Mode Receiver KIT
Partial List of Available Kits Ramsey Transmitter Kits
HR20 Amateur Receiver KIT
Ramsey HR-SERIES Amateur Receivers
Introduction
About Direct Conversion Receivers
Circuit Description
Parts Supplied with the HR20 KIT
Capacitors
LEARN-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 HR20
Alignment Hint for ALL Direct Conversion Receivers
Alignment
Tuning SSB Signals
Using Your Receiver
CW Operation
On the AIR TRANS-RECEIVING
Speaker Operation
Adding AN LED Power on Indicator
More Audio Power Another WAY
Troubleshooting Tips
General Notes for Experienced QRP Builders
Alternate Power Sources
Bandspread and Tuning Range
Frequency Stability
Other Methods of Dial Calibration
Direct Frequency Readout
LM386 Audio Output
HR20
Construction Notes
Ramsey Kit Warranty
Factory Repair of Assembled Kits
HR20 Amateur Receiver KIT
Total Solder Points Estimated Assembly Time
Required Tools
Additional Suggested Items
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