Question about Radio Shack TRC-503 CB Radio

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I have a TRC 502A CB radio that hasn't been used in about 5 yrs. I recently tried to use it and when I transmitted, the audio came thru the speaker. Any idea what's wrong?

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My Radio Shack TRC-503 has the same problem. Did you solve the problem? My radio had a bad speaker, and it worked great with another speaker hooked-up. But after installing a new speaker today, it started doing feedback during transmit, no matter what speaker I use.

Posted on Feb 24, 2013

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It could be grounded inside...Somebody may had it set for Talkback features.. Take it apart look for speaker wires (see if soldered to resistors) if its shorted seperate wires ..just have speakers wires attached. Try external SPKR. Try different mics or radio may have gone bad completely.

Posted on Apr 07, 2011

  • Steve Tompkins
    Steve Tompkins Feb 25, 2013

    Its grounded somewhere or the final(transistor 3 prongs bolted to chassis) has gone bad or preamp before Transmit finals are shorted. Needs done at Radio Shack. They service their own products at a decent price.

  • Steve Tompkins
    Steve Tompkins Feb 25, 2013

    Its a Radio Shack brand radio they service their own there.

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