> Danny Douglas N7DC wrote: > The best use of DSB in ham radio would be for SSTV or some > such. You could have the picture on one side, and voice > talking about it on the other.
Hi Danny, That's commonly known as ISB (Independent Side Band). DSB, or AMSC, is commonly what you get when you amplitude modulate, and suppress the carrier. I remember some inexpensive early Trio (Kenwood) monoband DSB rigs in Japan in the 60's. There was a 15m and a 40m version, and it had no clarifier! On the air, most of the SSB ops didn't realize they were talking to a DSB station. My friend JH1GNL, worked the world on 15m with one of those rigs. There is a big problem with DSB receivers trying to receive DSB signals, but they do fine with SSB signals. When working another DSB station, if you are not exactly tuned within a small fraction of a hertz, the phase or beat frequency between USB and LSB will drive you nuts trying to listen to it. :) Bonnie VR2/KQ6XA
