Calling all electrical gurus! I've had a strange thing come up in my sound system. In my coach, the Direct TV DVR is in the cabinet above the driver. Whenever it's plugged in and the DVR is UNPLUGGED, I get a bad buzz through the sound system. Plug it in, buzz is gone. I've tried plugging into an extension cord to a different plug. Any suggestions on tracking down bad grounds and such?
First thing to do is to get one of the circuit testers from Home Depot or the likes and ee if the plug is properly connected and grounded. Then check all of the plugs on that circuit.
Does this happen when you are plugged in at one particular site of just one site?
Ken
__________________ Amateur Radio Operator (KE5DFR)|Full-Time! - 2012 6.7L Ford Crew Cab Dually -2013 HitchHiker Champagne 38RLRSB - Travel with one Standard Schnauzer and one small Timneh African Gray Parrot
Sounds like the typical feedback problem assosciated with non-common grounds. You should be able to fix it cheaply by installing a "Ground Loop Isolator" going to your speakers. This is a standand piece of equipment that Winnebago installs on the majority of their coaches between the OE sound system and the speakers. If removed it usually gives a bad "Hummmm" noise in the speakers. Here is a link to one at Radio Shack:
__________________
2003 Itasca Horizon 39QD (Bert) 330 Cat, Blue Ox Aventa LX, USGear UTB, Progressive Industries 50a Electrical Management w/Remote Display, FloJet Macerator, TST Color TPMS, Ultimate Trik-L-Start all being pushed down the road by a 2005 Jeep Liberty (named Ernie)!
It just needs to be inline going to the speakers usually
__________________
2003 Itasca Horizon 39QD (Bert) 330 Cat, Blue Ox Aventa LX, USGear UTB, Progressive Industries 50a Electrical Management w/Remote Display, FloJet Macerator, TST Color TPMS, Ultimate Trik-L-Start all being pushed down the road by a 2005 Jeep Liberty (named Ernie)!