I have had cb radios for 8 yrs. 3 months ago, like a switch, a loud screeching and arking started almost steady, non stop, full bars on my radios. Had power co. they hear a noise (RF) with theire antanna, it did it once, so as he lives 2 hrs. away, I bought a noise finder, the arking was from my pole in front of house, they finally replaced it, insulators, transformer, and steady noise still there, can't get noise person back yet, of course this isn't important to them. I have talked 1 time in 3 months, have $3,000. in my stuff. Wwhere do I go from here? I can hear it in my Pick up too, its not just in house, neighbor 2 driveways down hears in his. Weather doesn't make difference, goes all nite, if it quits, may be 10 min. or few seconds. I like my radios. thanks, Linda
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You may have picked up some gravel in the rear brakes. Does it happen every time you back up? Does the car act strangely when backing up, like it needs to work extra-hard to move? Does it happen when your foot is on the brake? When your foot is off the brake? Is one of your neighbors missing a cat?
Inverters are full of diodes and diodes are extremly noisy devices. Also the filtering in CB radios is not the best as manufactures try to keep costs down to compete. Try unplugging the antenna from the radio and see if the noise stops. If it does not stop, then buy an inline filter to go in the supply to the radio and place it as close to the radio as possible. If the noise DOES STOP when the antenna is unplugged then it is coming in through the antenna and there is not much you can do but maybe buy a much higher quality radio with better filtering. You might try moving the antenna. Magnet mounts are not as good at blocking noise as high quality permanent mounts. Work to get your SWR as low as possible. Use high grade low loss coax from the antenna into the radio and use high quality connectors like the Amphenol brand. It takes time and effort to solve this type problem and some times nothing works.
i have same issue... good luck to you and me we bought a car with so much unreliability. people have reported spending thousands on unusual repairs on this vehicle. oh god all i want to do now is sell it and get something that can be true to my wallet.
I'm not an expert but I am a daily operator. First check your ground connection, just because the radio turns on doesn't mean the ground is good enough. If this unit is mobile there are several things you can do to reduce the noise. First you need to find out if the noise is coming in thruogh the antena or the power supply; turn on your radio and vehicle, unhook the antena. If the noise goes away or is reduced you know that it is RF noise. this is interference from some outside source, powerlines, TV, just about any thing that uses electricity or electronics can cause noise. relocating the antena may help. Check you antena connections. Check your SWR. This is only a few of the things you can check.