By Homer L Davidson: Radio Receiver Projects You Can Build

Radio Receiver Projects You Can Build: A Comprehensive Guide by Homer L. Davidson

• Beginners who’ve built a flashlight and are ready for RF.
• Hobbyists nostalgic for the days of Radio Shack project enclosures.
• Teachers looking for classroom-friendly circuits.
• Anyone who wants to hear a distant station on something they built with their own hands.

AM and Shortwave Receivers: Projects for standard AM broadcast bands and shortwave listening. Radio Receiver Projects You Can Build By Homer L Davidson

• What is regeneration? Positive feedback. By feeding a tiny bit of the output back into the input, the gain of a single tube or transistor explodes.
• Davidson’s Design: He uses a variable resistor (potentiometer) to control the "reaction" just below the point of oscillation.
• The Result: A simple 2-transistor regenerative receiver can rival a 5-transistor superheterodyne in sensitivity. You will hear SSB (single sideband) and CW (Morse code) clearly.
• Troubleshooting: Davidson dedicates a full chapter to curing the "thump" and "hiss" of regenerative detectors.

Tips and Tricks