Bob, G4APV, and I are grateful to Peter, G3PHO, for putting together a video of our activities on 30THz over the past two months. It can be viewed here
I hope you find it of interest.
73 Barry, G8AGN
I'm not getting it. Is it an actual "signal"? or just a version of a light/heat source being received by a photocell.
I must have missed the first days class.
The Germans in WW2 had a voice comms unit using light. Lichtsprechgerät 80/80