Anyone have a sugestion for noise in big truck ?

[mackmobile43]

What model pete do you have? I drive trucks also so this helps me.

 

[bubby1]

Daycab 379.

 

[mackmobile43]

Nice trucks, but lacking counterpoise and not much you can do about that so the best you can do to make sure the antenna mount has a good bond to the frame of the truck and the cab chassis to the frame and as said before try to locate the source of interference.

 

[bubby1]

Thanks again mack for the suggestions.

 

[JoeDirt]

Radio is a magnum s3.By chance where is the power supplied from to the roof mounted power points?I noticed when the headliner was down that the 2 wires coming off the power points lead to a small white connector which had a tag that read cb.I could not follow any further due to all the wiring up there so much in fact that I could barely get my hands in there.

Look for a LC filter they sell them for ham radios, also make sure EVERYTHING is grounded good!