"econof" wrote in message
news:dElpb.70518$ao4.195390@attbi_s51...
I recently installed a cobra 29 in my Ford Explorer. I understand the
previous owner had the radio "tuned". If I key the mike while my factory
car
stereo is on, I can hear it through the speakers. I called a cb shop and
one
guy claimed the interference wasn't because of the increased radio power,
but rather interference through the car's factory amp. Does anyone have
any
insight on this? If this is true , would bypassing the factory amp and
installing a new stereo cure this?

Unlikely.

I run both CB and much higher powered ham gear in both an explorer, and an
expedition, no problem at all with the factory radio.

Poor wiring or antenna work could be causing the problems. Any normal CB
should not interfere with your car stereo at all.

It's possible that a new stereo would be even worse.

Have someone who knows their business, check for RF on the coax. There
should be none.
Check where the CB is taking it's power from. Ideally, you should run a
separate feed to the battery. There's a convenient unused grommet under the
carpeting, on the passenger side.