Question about Cobra 29 LTD CB Radio

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When i talked no one can hear me but it move move the meter.

No can hear me when l key my mic . it moves their needle and moves my

needle on my meter. and i can hear everyone . i also tryed i new mic too!

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This may be a simple and very basic problem with all Cobra models. Honestly I wouldn't ever choose a Cobra, they're cheap radios. Instead buy a Galaxy or Uniden. But have you tried the Mic Gain? If not, turn the Mic Gain knob fully clock-wise and try asking for a radio check, if this doesn't solve it, you also might want to check the microphone's connecting ports, the connecting ports may be damaged or corrupted, if so, you can replace them by buying a new connecting port. If this doesn't work, your transmitter may be damaged or corrupted, this can be fixed, but it is expensive, you're better off getting a new radio. And don't forget, some truckers are dipshits (no offense) and ignore a lot of people.

Posted on Jul 01, 2008

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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

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Got a genaral lee radio that will not talk the recieve is awsome! when i key the mic the meter will begin to move but falls back. its like it wants to but it wont key, you can hear yourself on the talk...


May need some test equipment to find the fault on that one.
You could send it in to us and we can fix it.
*Just keep in mind that a new radio like that General Lee or Connex 3300 are only $199.99 MAX !!!+tax of course.. soo it depends on how much you have invested as if it is worth it to you to spend anything on it.
We do not charge to look at any radio -no bench fees-..
Let me know Ill get you any info that you need.

Oct 30, 2011 | Radio Communications

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Cx80, what does the code "rx" mean on the display



  • TX = Transmit. RX = Receive. Does your needle move when you key the mic? Does it modulate when you talk in the mic? Do you have an inline watt/SWR meter inline? What kind of a set up do you have? Mobile? Base? Get back to me if you want further help.
Regards, Tony

Oct 18, 2011 | Cobra 29 LTD CB Radio

1 Answer

I can only hear the others. When I talk they can't hear and my red anntenna keeps coming on when I push button to talk.


Assuming the antenna is mounted and grounded correctly,when you try to transmit/talk does your meter needle move to the right with your voice,if it doesn't make sure meter knob is set to receive/transmit or mod[modulate] does it move to right now,if not make sure the mic gain knob is turned up or if it is a power mic,is it turned up&have a fresh battery.The antenna light could mean high swr readings which you will have to adjust by tuning the antenna with the radio meter or external meter,you can search swr adjustment on your computer if unfamiliar..some antenna warning lights are factory set too sensitive but most times are telling you there is a problem.If all is set&tuned properly and you still can't get a local signal to respond, your radios transmit finals could be blown,which you'll need a qualified radio tech to determine..Good luck& 73's

Aug 13, 2011 | 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 25 ltd and when i key the mic the gauge of the db barley goes up. is something wrong ? also the gauge says its measuring tx power what does that actually mean/ do


TX means transmit. There are 3 settings for the meter. The top one is to measure your TX/RX that's transmit and receive. CAL is to calibrate the meter to check your SWR.

Reasons your needle may not be moving much when you key while on TX/RX. The dynamic is probably all the way down. That is your mic gain. If you turn that up when you talk the needle will swing more. If the radio is stock and not modded, you can turn this all the way up and leave it.

Also there could be something wrong with the mic. If people can hear you then its not the mic.

If people can hear you fine when you transmit, it may just be a bad meter. Not a big problem, you will just need an external meter to make sure you swr is not high.this is important because if it is over 1.5 you run the risk of blowing the final transistor.

Oct 11, 2009 | Cobra 29 LTD CB Radio

1 Answer

The mic doesnt work ...it use to but all the sudden it quit doesnt even key up so i can hear it my talk back


First, try another mic on the radio to be sure it's the mic and not the radio causing the problem. If it's the mic, check the wiring circuits for a bad switch or broken wire. Simply...the TX circuit is closed and the RX is open when the key is squeezed. The RX circuit is closed and the TX circuit is open when the key is released. Use a simple ohm meter to check for resistance between the pins on the mic (after removal from the radio of course). Open circuit will read 1, closed circuit should be very close to zero. You'll probably find the TX circuit never closes when the key is squeezed. Could be a broken wire or faulty switch in the handset.
Also check...If the mic "keys up"...you see the meter move normally, but no voice...it's either a faulty mic element (the little round thing you talk into) or the audio circuit of the radio has a defective component which a good CB shop can replace.

Jun 14, 2009 | Astatic 636L Noise Canceling Microphone...

1 Answer

I can hear people talking, but they can't hear me, or they say I sound like an alien


Check to see if the meter needle is swinging backwards when you key up. If it does your final may be bad. If the needle goes forward and others say they see your keying up but no sound your audio chip may be bad; especially if you have tried so many mics and antennas. If your radio has a swr warning light and it comes on this could extremely limit your range and others may not hear you and contiued use will damage your radio. Good luck!!!

Jul 26, 2008 | Cobra 29 LTD CB Radio

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