Mike Peebles "PO-1956" Amplified Crystal Set
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10:50
Rádio caseiro sem eletricidade. Fabricado artesanalmente e seu curioso funcionamento
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27:44
Your First Crystal Radio
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25:41
Philmore Crystal Radio Kit
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11:45
How to Make/Build a Crystal Radio
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12:41
2.4Ghz Crystal Radio
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29:34
Crystal Radio--Hi Q Hoop Coil--Copper vs Litz (4K)
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7:35
Variable inductor crystal set drives a speaker
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23:16