Guest Post: Building a DIY Crystal Radio Receiver

(Before It's News)

Crystal radios were first introduced during the early World Wars by tech-savvy soldiers, who built them behind enemy lines with whatever materials they could scavenge.  It is merely a primitive receiver that requires no battery power, because it counts on the power of the radio waves themselves.  As a radio receiver, it is a crude solution only built from materials you can find and scavenge.  It is not extremely effective, so don’t expect wonders.  It is an emergency tool, rather, that you can build when there is no other choice.

The most difficult component to obtain…

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2013-02-26 13:47:58

Source: http://www.backwoodssurvivalblog.com/2013/02/guest-post-building-diy-crystal-radio.html