High Pitch Whine

My AM radio has a high pitch noise coming from the speakers and It does it only on certain channels.

I know there is a filter I can buy, but dont know which one is the right on or how to wire it into the system.


Is there anyone here that can point me in the right direction

you might try calling Matt Bunker at lakeshore rv, 231 788 2040, hes really good at helping over the phone!!
please post what the problem turned out to be so maybe this thread can assist others!! Thanks.

We had the same whine. Took it to the dealer and they discovered the stereo system wasn't grounded. That was the radio in general - CD's, iPod, FM, etc.