Posted: 12/28/2012 5:08:26 PM EDT
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I have a FT8800 in my 2002 trailblazer, and there has been a lot of static on the "main" band lately. I'm finally figuring out it only happens when I step on the brake. It just seems weird that it only breaks squelch on the main band, never on the sub band, and it's just beginning about a year after I installed the radio.
Anyway, I'm wondering what might be causing it, and what I can do to stop it. Any help would be great. |
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Quoted:
I have a FT8800 in my 2002 trailblazer, and there has been a lot of static on the "main" band lately. I'm finally figuring out it only happens when I step on the brake. It just seems weird that it only breaks squelch on the main band, never on the sub band, and it's just beginning about a year after I installed the radio. Anyway, I'm wondering what might be causing it, and what I can do to stop it. Any help would be great. Are you wired to the battery directly? Does it do this with the ignition OFF? |
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Yes it is wired direct to the battery. If squelch is broken when I turn the car off, it stays open until I release the brake pedal, then braking again doesn't break squelch.
It's only 2 meter. And I noticed its not the main band necessarily, it's just the left band. |
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Some cars use Pulse Width Modulation controllers to operate LED lights. This type of a circuit is known to cause RF noise.
Get a small battery operated radio. Walk around the car and try to localize the source of the noise, Placing Split Open ferrite beads around the wiring may fix the problem. Usually it takes a lot of rf noise to affect VHF FM radios. |
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Also hook it up to a stand alone battery in your car so you can see if its in the air or wires Also mabey a ferrite core I'll check it with a jump box when I get a chance. Driving under stop lights (specifically the ones with the UHF monitoring systems in my hometown always seems to break squelch on my FT-2900 in my 04 Trailblazer.
I actually did notice it the other day when turning, and wondered about something like this as well. However, I then noticed it while turning without braking in a parking lot quite a ways away. Makes me think it is something in the wiring and not actually being recieved from outside the vehicle. Some cars use Pulse Width Modulation controllers to operate LED lights. This type of a circuit is known to cause RF noise.
Get a small battery operated radio. Walk around the car and try to localize the source of the noise, Placing Split Open ferrite beads around the wiring may fix the problem. Usually it takes a lot of rf noise to affect VHF FM radios. I don't believe there are any LEDs in my car, but I'm not sure. I'll try going around with a handheld. Where would I put the ferrite beads? Near the radio, or near the interferance source if I find it? Thanks everybody. |