Question about Cobra 29 WX NW ST 40-Channels Base CB Radio

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Radio lights up but nothing else

The face will light up but it will not transmit or recieve. the PA will also not work i took off the cover and no capacitors looked blown(that i could see) or anything else apparently wrong any help would be greatly appreciated

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  • earboy29 Jan 16, 2009

    the meter on my 29 ST LTD does not work. It will not transmit or receive. What possible problems could i have?

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Take the mic apart, and check the PTT switch. I have fixed the same problem on 4 different mics and there was nothing wrong with the radio.

Posted on Jan 26, 2009

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I have 4 vertex VH-160 radios, two of them have stopped transmitting, all have been dowlaoded witht he same frequencies. Batteries are good. Whe transmit buton is pushed, the is one beep then nothing. ...


The VX 160's may have bad oscillators. It is not user repairable. The simple thing to check are the antennas. Vertex radios are very susceptible to broken antennas and will not transmit. This is true of Uhf and Vhf. Replace one and try it on all the radios. Never transmit without a antenna. It can cause the PA in the radios to fail.

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Flashing red light on radio where it thinks its recieving. Transmits fine but does not recieve.


Three things come to mind:
1) The radio is receiving, hence the light, but you may have a different PL code than the other radio and it is muting the transmission. Check your programming to be certain both radios are programmed alike. The red light indicates activity on your frequency.
2) Your radio may have a problem with the receive side of the radio or a bad speaker.
3) The transmitting radio may have a problem with transmit. This can be a sign of a bad battery. Swap batteries and see if the problem moves to the other radio. If so, replace the battery. (It takes more energy to transmit than to receive, so loss of transmit is common with a bad battery.)
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My galaxy dx959 was droped when I put in my truck it doesn't transmit or rec. do you know what may of happen?


  • Anything could have happened. More than likely it took some "front end" damage. Do you get any transmit? Receive? Lights. When a PA speaker is hooked up and the CB set to PA do you hear any response? If yes then the voice chip is probably good. You may open the cover and see if anything looks like it came loose. Really there needs to be some testing done on a scope.

  • If you have any comments please feel free to leave them here.
  • Hope this helps and thank you for using FixYa.

Regards, Tony

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Just bought an 88hl. I know nothing about it other than it seems to be stuck on PA and when I key the mike it plays a song. It has been modified and has a switch on the side of it . Does not seem to be...


Hi xtreme, my name is John. Welcome to FixYa. You should have a switch that says PA/CB. Put the switch on CB, AM, turn the Dial to channel 26 27.225 and try that, let me know how it goes. Thanks for choosing FixYa...John

Dec 07, 2010 | Galaxy Radios DX- 88HL Base CB Radio

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I have a cobra 29 LTD that has no audio in the PA mode or the CB (transmit or recieve) mode i've changed mics and also changed the audio IC to no avail. where do i look now?


look into buying a new radio. If you had researched further you would have found out that unless you are on cb your radio will not operate . If you are on PA the you can only transmit through the PA system not the cb. If you changed the audio IC then you probably did a cold solder on it. You need an external speaker to operate the pa mode and an external speaker to operate the CB mode .If you decide to fix it more it will cost you more then buying a new radio.

Jul 14, 2010 | Cobra 29 LTD CB Radio

2 Answers

29 cobra ltd c.b. wont transmit or receive. mic antenna coax are good


make sure the RF gain is all the way up, and the dynamic is all the way up or most of the way up.

When you say the antenna is good, have you checked the SWR's and or have tuned the antenna to be the correct length for the radio? If this has not been done ever, your radio could be a brick.

Also, make sure the PA/CB switch is on CB. if its on PA(public address) it will not receive or transmit because it is on PA mode, which if you have one hooked up, a PA speaker, then you can talk to people through it out side your car.

Also, make sure the S/RF SWR CAL switch, its the first one on the left, is all the way up on S/RF. this is your signal/ receive setting for the meter. When you hold the key, does this needle swing forward? As well does the RX/TX light turn red? If it does, then the radio is transmitting.

There is another light on the radio under the TX/RX light. It is the Antenna warning light. If this light comes on when you transmit, or has come on all the time during transmit, and now it doesn't then the radio is a brick. That is a warning light. It means that the antenna is not matched, or has not been tuned to the radio. If this has not been done ever, you have killed the radio.

Here is why. When you transmit, you are sending off a radio wave. This radio wave, at 27mhz, is about 36 feet long. In order for the wave to radiate off the antenna, the length of the antenna has to match the length of the radio wave. Now it does not have to be a full 36 feet. It can be an exact multiple of 36 feet. In other words it can be 1/4( one quarter) or 5/8(five eights) of a wave in length. 1/4 of a wave is 108 inches, or 9 feet long. Your antenna is still probably does not seem 9 feet long, but there is usually a loading coil that is not exposed making up the rest of the length of antenna, so that it matches the length of the radio waves electrically. If you were to stretch the coil out with the antenna whip, it would be 9 feet long.

When the antenna does not match the wave length, part of the RF energy does not leave the antenna, and goes back down the feed line(coax) and hits the transmit transistor. Prolonged reflection to the transmit transistor, otherwise known as the final will blow it out. As well depending on how bad the length was off, the more off, the more reflect energy, the more RF energy you are blasting back into the radio, and this causes more things then just the transmit to blow out. Some time the receive goes along with it when it finally goes.

So if the RF gain is up all the way, which by the way is basically how much receive you have, and there really is no reason to have it down at all, and the CB/PA switch is on CB and the needle does not swing forward when its on the S/RF setting, chances are that the radio is now no good.

It is fixable, but if there are no CB shops near you then you will have to send it out. And Cobra will not cover this under warranty because its stated in their warranty that they do not cover damage due to high SWR.

Apr 06, 2010 | Cobra 29 LTD CB Radio

1 Answer

My galaxy66vc.b.radio stop transmitting


Take the cover off,you will need a vom-ohm meter,check the final and regulator,if the led light is working, then its not the keying transistor,check D77,under the mike plug, original #MA27T, the sub is NTE-605A varistor. Also check the mike plug,see if pa works. ..hope this helps..

Mar 25, 2010 | Galaxy Radios DX-66V Base CB Radio

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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

Doesn't Work


i know this may sound stupid. I can not tell you how many times a radio came into the shop with this problem.try this make shure that the cb/pa switch is on cb not PA.  

Oct 24, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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