
What is a Crystal Radio?
Crystal radio's were popular back in the early 1900's when the rectifying property of crystals was discovered and applied to radio receivers (source: http://en.wikipedia.org/wiki/Crystal_radio). Since then the crystal component has been replaced by a diode.That's where the name "crystal" radio came from. Now-a-days a better name might be the diode radio.
So, why would...