Voice-powered RF transmitter

Fred points out this schematic for a rather interesting radiotelephone transmitter instantaneously powered by the operator’s voice. [via]
One of the neatest minimalist amateur radio transmitter circuits around – this one is voice powered – it provides DSB, (double side band)modulation and power from an ordinary 8-ohm speaker – if are in doubt that the circuit works, the maker has the contacts and the voice recordings to prove it!
Voice-powered RF transmitter - [Link]
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November 5th, 2009 at 12:50 am
Reminds me of http://en.wikipedia.org/wiki/Thing_%28listening_device%29