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Cobra 29 can receive but transmission cant understand whats said tried different mic,coax,antenna same problem

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It could possibly be a problem with I.C.uPD 2816 . Take it to a cb shop and have them check the voltages on it and then your driver and final.

Posted on May 01, 2017

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Posted on Jan 02, 2017

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2 Answers

Cobra 29 ltd Classic no sound, no rx, all lights work rx,tx, lite up. The SWR meter moves when mic is keyed up.


Check speaker and plug external one in if you have it.

swap mic could be a broke wire or bad switch in handset.

check antenna and coax connections.

i know checks sound basic but they could save you a lot of headaches later

May 31, 2011 | Cobra 29 LTD CB Radio

1 Answer

I can't here people talking


There are some things that can cause this to happen that are simple fixes, and then others are issues inside the radio that need a tech's diagnosis.

I will give you the simple issues.

  • RF gain is down. turn it all the way clockwise.
  • Squelch is too high, turn it down until you hear fuzz, then turn it up until it stops.
  • You my have a problem with your mic. When there is a broken wire in the mic cord then the radio will not go into receive mode. Try a new mic.
  • You may have an antenna or coax problem. Make sure the antenna is tuned to the best SWR, and make sure there is no damage to the coax.
Hope this helps.

Oct 22, 2010 | Cobra 29 LTD CB Radio

1 Answer

Worked just fine in My big truck, but I upgraded to a BIGGER Radio and have installed my Cobra 29 LTD in my wifes truck. Used a mount and screwed it to the bed of the truck. Has 18' Coax, new mic., 3 ft...


is she getting bad motor noise? Make sure the ANL is on. Is the antenna tuned for best SWR? if the antenna is not tuned it can effect the receive.

Sep 14, 2010 | Cobra 29 LTD CB Radio

1 Answer

29 c0bra will transmit but wont receive antenna coax all good


Do you have any noise at all coming thur? If not do you have an external speaker try it still nothing then take your speaker plug and plug it into your pa jack key the mic do you hear anything if not its your IC chip,its bad it'll need to be replaced,if you do it could be a bad soilder on the board or a broken wire in the mic.

Apr 20, 2010 | Cobra 29 LTD CB Radio

1 Answer

Problem while matching CB


You need to understand how to tune an antenna and how the antenna works.

read this article

How to tune your antenna

and here is a list of causes for high SWR

Oct 28, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 wx st


IF YOU CAN RECIEVE THAT IS A VERY GOOD SIGN THAT YOUR SWR MATCH IS OFF....I DONT KNOW IF YOU MATCHED UP YOUR RADIO WITH YOUR ANT.IF NOT YOU CAN BUY A CHEAP SWR METER @ RADIO SHACK...CHECK THAT YOUR COAX CABLE IS OK TRY TO REPLACE THE COAX......GOOD LUCK

Feb 14, 2009 | Cobra 29 WX NW ST 40-Channels Base CB...

1 Answer

Cobra 29 LTD Classic not transmitting or receiving


ant. light should only come on if you have a high vswr a bad thing did you check that cb/pa switch is set to cb check your swr this is not a good place to mount ant. as it is close to metal of back of cab

Dec 20, 2008 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29 LTD Classic not transmitting or receiving


As I understand from a tech friend of mine, most truck beds are not grounded well enough. Perhaps you could borrow/purchase a magnet mount antenna and locate it on the roof, for testing. Then you would have it narrowed down to the location.

Dec 05, 2008 | Cobra 29 LTD CB Radio

3 Answers

Uniden pc78ltw


The pc78 is the same chassis as the cobra 29 so any info you san find on the cobra 29 will work the same for your pc78..What kind of problem are you having?? Chia

Dec 23, 2007 | Uniden Bearcat Pro PC78LTW 40-Channels...

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