I have been fighting this problem for several months. While I transmitting on ssb, the azmuth and elevation rotors would fluctuate several degrees.I had convinced myself it was an RFI issue.I tried bypass caps,clamp on ferrite chokes without success.I finally ran a ground wire between every piece of eqpt In the shack and it was 100% gone.It was not RF at all,it was a ground loop issue. Jeff , WB8RJY.

jeff broughton