Your First Varactor Tuned Crystal Radio
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27:44
Your First Crystal Radio
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29:19
Regen Secrets!
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29:34
Crystal Radio--Hi Q Hoop Coil--Copper vs Litz (4K)
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17:25
xtal1
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27:21
EMP Proof Your Crystal Set
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17:34
2ª GUERRA MUNDIAL, RADIO DEL AGENTE MILORG - OLGA
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10:50
RADIO casera SIN ELECTRICIDAD. Fabricación a mano de la RADIO GALENA y su curioso funcionamiento
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23:42