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How does a cat's whisker diode actually work? : r/AskElectronics
Amazon.com: United Nuclear The Ultimate Crystal Radio Kit Authentic Cat's Whisker Diode - Vintage Crystal Radio Circuit Craftsman Radio Kit : Electronics
Crystal detector - Wikipedia
Amazon.com: United Nuclear The Ultimate Crystal Radio Kit Authentic Cat's Whisker Diode - Vintage Crystal Radio Circuit Craftsman Radio Kit : Electronics
Accidental LED Fabrication | Hackaday
Crystal radio hi-res stock photography and images - Alamy
TIL that near the 1940s it was popular to build DIY radios called "crystal sets." It needed no other power source but that received solely from the power of radio waves received by a wire antenna. : r/todayilearned
Crystal Detector: Cat's Whisker Radio Detector » Electronics Notes