Ramsey Electronics manual HR20 Amateur Receiver KIT, Required Tools, Additional Suggested Items

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HR20 AMATEUR RECEIVER KIT
Quick Reference Page Guide
Introduction to the HR20	................ 4
Circuit description	6
Parts list	7
Schematic diagram	9
Parts layout	10
Assembly instructions	11
Initial testing	14
Alignment	15
Troubleshooting guide	19
Warranty	26

REQUIRED TOOLS

•Soldering Iron Ramsey WLC100

•Thin Rosin Core Solder Ramsey RTS12

•Needle Nose Pliers Ramsey MPP4 or RTS05

•Small Diagonal Cutters Ramsey RTS04 <OR> Technician’s Tool Kit TK405

ADDITIONAL SUGGESTED ITEMS

•Holder for PC Board/Parts Ramsey HH3

•Desoldering Braid Ramsey RTS08

•Digital Multimeter Ramsey M133

Price: $5.00

Ramsey Publication No. MHR20 Assembly and Instruction manual for:

RAMSEY MODEL NO. HR20 AMATEUR RECEIVER KIT

TOTAL SOLDER POINTS

84

ESTIMATED ASSEMBLY

TIME
Beginner	3.0 hrs
Intermediate	2.0 hrs
Advanced	1.0 hr

HR20• 28

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Contents ALL Mode Receiver KIT Partial List of Available Kits Ramsey Transmitter Kits HR20 Amateur Receiver KIT Introduction Ramsey HR-SERIES Amateur ReceiversAbout Direct Conversion Receivers Circuit Description Capacitors Parts Supplied with the HR20 KITLEARN-AS-YOU-BUILD Receiver Assembly Strategy HR20 HR20 Parts Layout Diagram Receiver Assembly HR20 HR20 Initial Testing of Your HR20 Required for Initial Testing and AlignmentAlignment Alignment Hint for ALL Direct Conversion ReceiversUsing Your Receiver Tuning SSB SignalsCW Operation On the AIR TRANS-RECEIVINGSpeaker Operation More Audio Power Another WAY Adding AN LED Power on IndicatorTroubleshooting Tips Alternate Power Sources General Notes for Experienced QRP BuildersBandspread and Tuning Range Other Methods of Dial Calibration Frequency StabilityDirect Frequency Readout LM386 Audio Output HR20 Construction Notes Ramsey Kit Warranty Factory Repair of Assembled Kits Total Solder Points Estimated Assembly Time HR20 Amateur Receiver KITRequired Tools Additional Suggested Items