[Laser] Laser Digest, Vol 85, Issue 2

[Barry Chambers]

Steve

Gordon, G0EWN, and I have worked 42km in full mid-day sunlight using 
baseband AM signals. The Tx were based on a 3 watt Luxeon LED with an A4 
size Fresnel lense. The Rx were based on a silicon photodiode fitted 
with a narrow bandpass filter and an A4 size Fresnel. During the 
contact, the ambient light was so bright that the distant Tx could not 
be seen even through 7x50 binos. We believe that much longer DX is possible.

Barry, G8AGN



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