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 itself is based off one of [Art Swan]’s ...
[Michael Rainey, AA1TJ] never quite forgot it. Back in 2009, he built “El Silbo”, a ham radio transmitter powered entirely by his voice. El Silbo is a Double Side Band (DSB) transmitter for 75 ...
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