The Crystal Radio Receiver Kit
by James K. Sayre
When I was about thirteen or so, I ordered a Crystal Radio Receiver Kit by mail. My father helped string up the required fifty foot radio antenna in our backyard. After the Kit was easily assembled, I could use earphones to listen to AM radio stations, all without any external AC or battery power source. The receiver was powered by the radio signals collected by the long antenna.
Nowaways, in our age of paranoia and uncertainty in the 21st century, a crystal radio receiver could also serve nicely as an emergency radio receiver: no batteries to wear out and its works just fine when the electrical power has gone out.
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Web page last updated on 19 October 2007.