I have mobile Cobra 18WX-ST CB Radio hooked up to a 4ft Firestick no-ground antenna in a Motorhome. When I tur?
Question: antenna installed in a Motor composed When I turn the radio on it hum ms constantly. If I unplug the microphone, its stops.When I jam it back in its starts humming again. I have tried other microphones and it still does that.I had the 19 cobra radio before and it didn't do that.
Answer: Do you have fluorescent lights in the motor shelter? Try turning those off.







