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The Complete Guide on How to Build a Crystal Radio—Plus How They Work « Steampunk R&D :: WonderHowTo
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Crystal Radio Sets & Cat's Whisker History » Electronics Notes
Remembering the Crystal Radio | Nuts & Volts Magazine
Crystal Radio Sets & Cat's Whisker History » Electronics Notes
The Complete Guide on How to Build a Crystal Radio—Plus How They Work « Steampunk R&D :: WonderHowTo
