Hi rebulx,

Just a couple of specific questions, so I can add your experience to my list of "ground-loop fixes".
So when you refer to the "the cable", do you mean the TV-cable feed to your outboard cable-TV tuner set-top box? And did you feed the cable-TV to the surge protector, then to the Cable-TV box?

And which cable did you unplug from the cable box when the hum got louder? I'm trying to get this straight in my mind.

Regards,

Alan Lofft,
Axiom Resident Expert (Retired)