I have a 2002 F250 Desiel with the factory radio. I listem to AM talk radio. When I turn on the A/C I can hear a buzz when the compressor kicks in and out. When I load my 2000 Lance 1010 Truck campe...
Googled AM Radio Buzz Filter This was a common problem years ago. There was a condenser that you placed across the radio power input but I see they have become more sophisticated. These seem to be inline to the antenna.
The type of sparkplugs used affected the problem as well. The buzz frequency would change with engine RPM. I think that is a thing of the past now.
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