I have an Astron VS-35M power supply for my Kenwood TS-440S radio. It buzzes when I transmit. A little bit on SBB (voice peaks). A lot on CW / RTTY. It didn't do this a few weeks ago, but I moved it from one shelf to another. I'm guessing RF is getting into the power supply. Besides moving my antenna 70' off the ground (not going to happen) or tuning my antenna to get from a 3:1 SWR to a better SWR (also not going to happen at this time), is there anything else I can do to prevent it from buzzing during transmit?