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Old 08-06-16, 03:21 PM
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Does anybody know what this is? It was attached to an old mobile CB radio of my Dad's. I don't recall how it was wired to it. I'm thinking it's a filter or a 24 to 12 volt resistor? The CB may have been in a vehicle with a 24 volt system. The red and blue wire have continuity Attachment 69304
 
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Old 08-06-16, 03:41 PM
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Probably a noise/static filter.
 
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Old 08-06-16, 03:53 PM
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Thanks, I believe you are right... now to figure out how to wire it up
 
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Old 08-06-16, 04:09 PM
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Filter........................ Red blue go in line of power cable to CB. Black is ground..
 
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Old 08-06-16, 05:51 PM
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thank you I will give it a try
 
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Old 08-07-16, 01:12 AM
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It's probably a choke/capacitor combination. Most newer vehicles don't generate the noise that was designed to filter. It may remove alternator whine if you have that problem.

I don't recall any 24v CB's. He may have had a 24v>12v convertor.
 
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Old 08-07-16, 04:21 AM
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I wired it up to my CB and it didn't make a difference I still have a whining noise through the speaker, I tried (red) wire power in (Blue) power out and then reversed them... Ran separate wire from black to ground. Maybe it is faulty? Thanks for all your help, I may order a new one
 
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Old 08-07-16, 11:57 AM
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A whining noise that changes pitch when the engine rpm changes ?
That would require a choke.

Most CB's have an ANL switch on them.... does that one and does it help ?
 
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Old 08-08-16, 04:18 AM
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Yes it changes pitch with the engine... The switch is in the ANL position, it helps a bit but still whines. I will search for a choke filter. I didn't realize there were more than one kind of filter, Thanks for your help
 
 

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