How on earth could a single transistor form the heart of a radio receiver with enough sensitivity and selectivity to be useful, you ask? The answer lies in an extremely clever circuit: the ...

He’s built himself an amazingly well constructed FM transmitter that’s powerful enough to be received a quarter mile away. The FM transmitter circuit ... drawers of any Radio Shack.

The broadcasts cannot be heard on a simple AM/FM radio receiver. There are many receiver options, however, ranging from handheld portable units which just pick up Weather Radio broadcasts ...