Question about Cobra Radio Communications

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I have cobra 29 mobile cb an every now an then it dies out . Power is on on noise I can key the mike an the needle don't move an can't here talking

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  • 98 Answers

May be a chip inside there that controls receive and transmit. Its about a 16 pin chip. If its getting hot. you may need a new one.

Posted on May 24, 2011

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1 Answer

Trying to setup a cobra 29ltd chrome. Put on channel 20, switch set on cal, keyed up the mic, and when I turn the swr cal knob the needle won't move. Magnetic ant with acc outlet for power Any ideas


First, make sure that the CAL/SWR/RF switch is set to CAL. If you still can't move the needle, check the RF output. If the needle moves to the far right, you at least have output power, and something is wrong with the SWR circuitry. Does the needle move with incoming signals?? If the needle doesn't move, then you either have a damaged meter. If the needle moves on rec eived signals but not when you transmit and the switch is set to RF, then you most likely have a damaged transmitter output stage.

Oct 01, 2016 | Cobra 29 LTD CB Radio

1 Answer

My cobra 29 turns on but i have no sound i can hear it key up and the meter swings speakerand mike are good could it be the finels


Are you sure its not on PA mode? And if the meter swings forwards its not a finale. It could be a bad soldier or IC chip. If you don't have it on PA to see if your IC chip is good take an external speaker plug it into your PA jack in the back turn on the PA switch and then key up the radio.Does it squeal or make any kind of noise if yes the the chip is good if no then there's your problem.If it is good Then its could be just a simple bad soldier.

Jul 15, 2012 | Cobra 29 LTD CB Radio

1 Answer

Can not get static out of radio i have a cobra 29 with weather channel the squ knob seem 2 b not working sometimes can u help me


Turn the squelch down, and the RF gain all the way up.

You need to realize that some times, there is not a lot of noise out there. Right now lately there has been due to skip. But it does die down. When you hear a lot of noise for a while, then it goes away, it messes with your head. You don't hear anything, but that's because its quite out. I would test it by talking to some one on the radio. If you can hear them just fine even though you don't hear a lot of static, then its just quiet out.

Jul 23, 2011 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Cobra 29 nw when you key the radio the swr meter doesnt move and if you move the swicth to cal you can adjust it with out keying the mike but has good recive any help would be good thanks dwayne


To check the SWR, you put the swicth on CAL and key the mike with mike gain turned down all the way,then calabrate it to the meter on the CAL scale,then swicth it to SWR before you unkey the mike, then what ever the needle falls back to, that is your SWR reading.

Apr 26, 2010 | Radio Communications

1 Answer

I just installed a cobra 29 in a customers truck. Radio gets power but cannot get any feedback


Make sure you have the radio on cb not pa, turn the squelch to the left, turn RF gain to max. check the mike and antenna, key the mike, does it key up?....hope this helps....

Mar 11, 2010 | Cobra 29 LTD CB Radio

1 Answer

When I key the mic the needle on the meter does not move I have power to the radio and the mic is new


Try putting it on cb not pa,see if you hear other people talking,now try it.....could be the mike is not wired right,or bad meter..Put it on channel 19,ask for a radio check,if someone answer,s you its ok, maybe meter not adjusted...hope this helps..

Feb 28, 2010 | Cobra 29 LTD CB Radio

1 Answer

I have a cobra 29 NW ST LE. When I key the mike, the needle in the gauge does not move, but the light is on. I don't know if I am heard or not. The RX/TX indicator does change to red though. Could that be...


Check all of the switchs on the radio,
if all are were they belong then the meter is
bad,but you need to try to find someone to
give you a radio check onair.
Maybe this helped.

Aug 23, 2009 | Cobra Radio Communications

2 Answers

Cobra classic 29 ltd


Had fixed the same problem yesterday. My cobra worked when it wanted to, when it didn't it looked like you explained. I found out that on my cobra the blue wire on the mike connector was broken. When it disconnects, no sound. after soldering, everything works fine.

Dec 04, 2008 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 WX


This "talkback" feature may be due to someone having modified the radio by adding a small resistor between the speaker circuit & circuit ground.Another cause could be the shield lead in the mike plug shorting to the plug itself.

Apr 23, 2008 | Cobra 29 WX NW ST 40-Channels Base CB...

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