If you hear a whining or a high pitched whir that changes as the engine speed changes then you have to add filters (capacitors) to the alternator. If you hear cracks and pops then you have problems with the ignition wires. You do need to bond (electrically connect) the ground of the CB antennae to the frame. Not only will this reduce interference it will give you a lot more range as the entire car cam become the "Ground Plane". All of the S/S panels and the trim around the windshield are supposed to be bonded by small wires. You may have to repair some of them. This is not really "feedback" so much as intererence created by the motor and picked up by the CB. Get an AM radio and set it in between stations. You will hear the interference and can use it like a direction finder to locate the source. The closer you get the louder it will be. You may also have to add filters on the power line to the CB radio to reduce the noise on the DC power to the radio. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxxxxxx, "Alan Roberts" <twodelo2@xxxx> wrote: > Patrick, > Your feedback problem is in effect, having isolation between the antenna ground and the CB ground. This is complicated in that the coax from the radio to the antenna is supposed to be for isolation, keeping the signal going through the cable from being affected by the signal being radiated from the antenna. Without a good ground to the car c To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/