LED voice transmission over 104 miles

[Andre Kesteloot]

LED voice transmission over 104 miles:
These Tasmanian hams transmitted voice over 104 miles between mountain 
peaks using  Luxeon LED-powered transmitters. The circuits and pictures 
of the rigs are described.

Check out the old school handset being used.

Of course they were dismayed that U.S. Army heliograph operators managed 
183 miles more than 100 years ago (Morse code).

Now that's old school!
http://www.makezine.com/blog/archive/2006/07/led_voice_transmission_over_10.html
 
(from one of our Correspondents)


André N4ICK
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