Question about Cobra 29 LTD CB Radio

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I have an old 23 channel cobra 29. it lights up but does nothing

I have an old 23 channel cobra 29. it lights up but no sound, no transmit, nothing. i've tried three different working mics, still nothing. where do i look for the problem?

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It is not a dirt issue, the final transmitter is bad. This is caused normaly from a bad antenna or wire going to the antenna. These can be replaced. There is one big on near the back of the radio, 3 prong black transistor connected to a piece of metal (heat sink), unsolder the old one and obtain an exact replacement. (perhaps radio shack or repair shop), solder the new one in. This will sometimes be screwed to the heatsink on the very back of the board connected to the rear of the radio.

Before reconnecting the radio have the antenna checked for damage.

Posted on Sep 25, 2009

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I had the exact problem but the radio was bought brand new. Come to find out it was originally strapped on the board to be a ham radio, or so I was told. However, it was covered by warranty and sent back and strapped to work correctly as a CB.
May be that this is the case with your radio.

Posted on Sep 27, 2009

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If the radio has sat for a long time,sometimes the
channel slector will get dirtty and not make good
contack,try a can of tunner cleaner spray inside
on the channel slector an turn it back & forth,
let it set for a few min. and try the radio.
If that don't work you have problems inside on
the board.
Maybe this will help

Posted on Sep 24, 2009

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  • 55 Answers

That old radio had a "power" mic. Check the battery in the battery box on the back of the mic. good luck.

Posted on Mar 12, 2011

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Posted on Jan 02, 2017

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hope this helps.......good luck!

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