I have a refrigerator with a thermostat that transmits the nastiest heterodyne across the entire radio spectrum to the point that it trips on the sub-woofer in the living room! Funny thing is it's the most efficient best running fridge I've ever had. My question-could that interference ruin anything in my old trans-oceanic if it strikes while radio is on? I'm always nearby so I can kill the radio until it stops, but I wonder if it's necessary.

Frank: replacing the thermostat may be best, but in the meantime, you might want to try putting some snap-on ferrite cores (rf chokes) on the wiring to and from the thermostat. You can find various sizes on the internet. This will help supress any rf radiating from the wiring, and the snap-on design allows you to install them without having to remove and replace wiring. Also check that your frig is grounded properly.
Steve

Thanks for the help, Steve!