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Crystal radio: History, fundamentals, and design: Kinzie, P. A: 9781887736053: Amazon.com: Books
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Building a crystal radio set - OpenLearn - Open University
rf - How to design a crystal radio receiver on a bread board? - Electrical Engineering Stack Exchange
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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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Tuning Coil Construction High Selectivity Crystal Radios | Radio, Shortwave radio, Crystals
