Independent Sideband SSTV

 

Several expirimenters tried to come up with schemes to be able to simultaneously send SSTV pictures and talk about them. Receiving generally took place by simply taking two separate receivers, one tuned to 14230 upper sideband to receive the SSTV picture on a P7 monitor, and the other receiver on LSB picking up the simultaneous voice.

Transmitting was more difficult due to the difficulty of the high RF voltages involved. A few people made special exciters that used a matched set of mechanical or crystal filters to pass only the desired sidebands. The output of the low level exciters were then combined in a common driver which drove a common final amplifier. Others developed special coaxial rings that let two separate transmitters drive a common amplifier without adverse transmitter interaction.