Spare The Rod? Spoil the Crystal Set - Part 1
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27:12
Ferrite Rod Fun Part 2
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24:53
Shortwave Crystal Set - BFO! Part 2
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20:23
Crystal Radio Part 2
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29:34
Crystal Radio--Hi Q Hoop Coil--Copper vs Litz (4K)
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7:57
A Look At Two Crystal Radios
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12:26
И что слышно на детекторный? Простая электроника 86
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16:05
crystal3.mpg
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10:50