I'm not sure on newer trailers but on the old converters there was only one or two "clean" dc outputs for electronics. When I installed a car radio in the bedroom I got an ac hum from the circuit I tapped into when on shore power. I was able to eliminate it with a Line Choke from Radio Shack. Do you only get the hum when connected to shore power or all the time. As mentioned above check all grounds first.
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Hank & Lynn
2007 Cougar 290RKS, E-Z Flex, 16" XPS RIBs ( SOLD .. Gonna miss her ... looking for new 5r)
2004.5 Dodge 2500 QC, LB, 5.9HO, WestTach gauges, Ride-Rite
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