This occurs all the time whether I'm on the road or sitting at home away from power wires.Hi Mike,
I have a ham friend that is having extreme noise from the power lines but only near his house. Have you tried checking the noise level a few miles from your house?
Larry in El Paso
Turning on the squech only turns off the static noise but I could still see the radio busy by the receive meter.assume you have tried to resolve with the squelch. But if not thats the first place I would look. Then my experience has been that the physical location of the antenna might be a problem, and or feedback from the ALT. I think one of the golden rules I recall was that you needed to get your ground and power feed directly from the battery.