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CB Radio Interference
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=82421		 Page 1 of 1
Author:  usa591 [ Sat Jun 20, 2015 6:34 pm ]
Post subject:  CB Radio Interference
Hi everybody,

I recently installed a CB radio in my rig, and I am getting some interference that rises and falls with the engine RPMs. Since there are no spark plugs, I am wondering where it is coming from. It is a distinctive tap tap tap sound that matches the engine RPMs. Is it from the fuel pump? Currently the radio is connected directly to the battery and I don't have the negative side grounded on the chassis.

I also have a Ham Radio that is connected to the battery in the same fashion, and I don't have any interference issues with that.
Author:  flash7210 [ Sat Jun 20, 2015 7:14 pm ]
Post subject:  Re: CB Radio Interference
My guess is that the interference is coming from the alternator.
It's the only thing that makes sense.

That or it's a problem with your radio set.
Author:  usa591 [ Sun Jun 21, 2015 3:03 am ]
Post subject:  Re: CB Radio Interference
flash7210 wrote:
My guess is that the interference is coming from the alternator.
It's the only thing that makes sense.


True.

I will ground it in a different way at some point and report back. Ground the radio, that it. Don't think I'll switch out the alternator just yet.
Author:  synthetic-oil [ Sun Jun 21, 2015 8:12 am ]
Post subject:  Re: CB Radio Interference
You have either a ground loop problem or a RFI problem. One way to narrow it down would be disconnect the antenna physically from the radio. If the problem goes away, it's a ground loop problem, If it stays, it's a RFI problem.
Author:  usa591 [ Mon Jun 22, 2015 1:51 am ]
Post subject:  Re: CB Radio Interference
synthetic-oil wrote:
You have either a ground loop problem or a RFI problem. One way to narrow it down would be disconnect the antenna physically from the radio. If the problem goes away, it's a ground loop problem, If it stays, it's a RFI problem.



I disconnected the antenna and it went away, ergo, ground loop problem.
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