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voice powered radio

Found on the AM Forum.

Occasionally in ham radio, there a few things that turn  up now and
again that make my jaw drop- this is one of them.

Http://mjrainey.googlepages.com/elsilbo

"This double-sideband (DSB) radiotelephone transmitter is powered
entirely by the instantaneous (not stored) energy produced in the
operator's voice. The RF output power in my prototype falls within the
range of 5 to 15mW. The circuit is essentially a high-level DSB
modulator/crystal-controlled RF oscillator."

Seems the louder you shout , the further you get.

73s Brian GM4DIJ
--
Brian Howie

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