| | | Antique-style crystal radio kit. Heathkit may be out of business but you can still get old and old-style crystal radio kits from www.xtalman.com.  I put this one together with my six-year-old: Can you tell?  Crystal radios use germanium diodes because they have a lower voltage drop than silicon, and are therefore more sensitive to weak radio signals.
 Source: Borden Radio Company
 Contributor: Theodore Gray
 Acquired: 18 April, 2003
 Text Updated: 11 August, 2007
 Price: $16.50
 Size: 6"
 Purity: 99.99%
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