Why do I hear myself through my stereo speakers?

What your getting is called RF feed back or by pass. What it is is the signal from your CB antenna is getting into the amlifier section of your AM/FM/Stereo and bleeding into the speakers. The best way to stop it is to wrap your speaker wires around a turoid this will sheild them. The other thing is to ground you stereo system itself to a good ground. Also ground your CB and your CB antenna and make sure they are grounded to the frame. The grounding alone should help but if not check the routing of you coax from the CB to the antenna if it runs along the same path as the stereo speaker wire it would help to reposition it away from the speakers.

 

Is a iron powder graphite disk that is made to wrap wires around it will block harmonic freq from passing thru it. they sell them at radio shack under the name of rf chokes, or feride beads.

 

Put the modulation limiter back into the cb, problem solved!

 

Don't worry about the limiters because you said you never had the radio "tuned or peaked". Tuning or peaking eventually leads to adjusting or mis-adjusting the modulation limiter control.

As said in another post, your stereo is acting as an unintended receiver for the cb band. It's most likely caused by the stereo's speaker leads acting as an antenna, picking up a fair amount of cb signal power & overloading the sensitive audio preamp stages in the main amplifier section.

You need to find out if your cb antenna is grounded to the mirrors well & there's a good swr reading. If there's a fairly high swr, some of your cb's transmit power is coming back down your cable & radiating into the close by speaker leads.

If everything is otherwise good, use those Toroid cores that someone mentioned. You used to be able to find them at radio shack. They look like a square once they're snapped closed.

To use, wrap the extra speaker leads around the open toroid form as per the directions & then simply snap it closed. Put the toroids nearest the stereo as possible. The closer to the stereo the better. This effectively limits the length of speaker wire that can act as an antenna.

If the toroids don't eliminate or reduce it to a livable level, you'll need to hit a cb or stereo shop for the remainder of the cures.

A last thought, move the cb antenna away from what you believe is the stereo's antenna. It too, could be the culprit in bringing too much cb signal back to the stereo amplifier.

 

I would bet you money that if he got the radio from a CB shop it was clipped before he walked out the door with it, no matter if he told them to do it or not! The only way the radio would do the things you say is if were over modulating, a stock unmodified radio will not do this especially with an SWR that low. Find a CB shop and have it checked and if it's doing more than 20 watts it's been clipped!