Originally Posted by drock2
If I use my CB while driving I seem to pick up engine noise through the speaker. Both the radio and antenna are grounded. The CB isn't wired directly to the battery, which I've heard could be a problem. I've also seen filters. What would be my best bet for fixing the problem?
The solution is to put a "Choke Filter" in line on the positive power feed.
I was able to get information on the WWW about this filter.......The NF-20 is one of the best DC power line filters on the market today. Better than the filters offered by the big chain stores. Handles up to 10 amps at 16 VDC maximum.
Tech Tip: If you plan to use this filter with a CB radio, you should test to make sure that the noise is actually coming through the power line. Simply disconnect the coax from the radio. If the noise disappears, the noise is coming from your antenna and a power line noise filter will not help you. If the noise remains after disconnecting the antenna from the radio, the NF20 should work for you.
I hope this helps.