Question about Cobra 29 LTD CB Radio

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Cobra 29ltd CLassic, TX power and audio is ok, volume from spkr is good, squelch works but no cb recieve.

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Try a new Mic. Make sure its a working mic. If you have a bad mic, the receive will not work.

Posted on Aug 25, 2010

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Posted on Jan 02, 2017

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1 Answer

Plugged in my 29ltd classic no power nothing lites up cord and fuze ok


You blew a diode near back of radio.(1) Take back cover off.spkr side) (2), see if you spot a black diode with a white stripe in right hand side between audio transformer and chassis near power wires coming in. (3)replace that diode; solder it..it may work again.

May 24, 2011 | Cobra Radio Communications

1 Answer

Cb has power but no squelch,can't recieve or transmit


Begin with
  • Volume knob 12 o'clock position
  • Squelch knob full counter clockwise
  • RF gain knob full clockwise
  • Pa/CB switch to CB
  • Mic plugged in
  • Check coax and antenna connections.
  • Make sure your antenna gommet/insulator is installed correctly or it will directed gound. Treat antenna shaft as it is the positive portion of circuit.
If you have another CB check the antenna system with that rig. To verify it is a radio issue. Then dig deeper Microphone, PLL chip, Audio chip etc.

Jan 11, 2011 | Cobra 29 LTD CB Radio

2 Answers

My cb cobra 29 ltd problem is channel 1 is ok but channel 2 not receive


Did you have someone get on channel 2 to see??? Maybe channel 2 was quiet and channel one had better receive or noise.. You never know until you check it with another radio. That is NOT a common issue at all on those radios. Better off doing that test.
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS OF CB FUN!!!

Dec 28, 2010 | Cobra 29 LTD CB Radio

1 Answer

My radio recieves ok but only whistles when i key the mike is this a major fix?


Do you have talkback installed? It my be too loud and causing feed back. Back the mic gain down if so.

Could also be improper mic wiring. If you use a mic that is wired for a different radio, it could just cause a hum, buzz or squeal.

Another thing that can cause a hum, buzz or squeal is a faulty volume and or squelch knob depending on the radio.

  • Turn down or disable talk back.
  • If you cannot turn off or disable talk back, lower mic gain.
  • Try a different mic that you know is wired for cobra.
  • Play with volume and squelch knobs while TX and see if it stops at all. If it does replace knob.

Oct 12, 2010 | Cobra 150 GTL DX Base CB Radio

1 Answer

Cobra 29LTD speaker inop....No audio at all. Speaker Ohms out ok as do speaker leads from board to speaker. External speaker jack is inop. PA works in PA and CB modes. Other than speaker issues, radio...


There are some different things you could be facing like:
the speaker sound being cut-out by the mic switch, but my first guess is the switch in the external spkr. jack being faulty. Here is a schematic for you.

http://xbones_antennas.tripod.com/id21.html

Apr 12, 2010 | Cobra 29 LTD CB Radio

1 Answer

Cobra 142 gtl no audio on receive work on pa, an on ext spkr get talk back,,,,but there no talk back in radio.... no audio on int spkr. tx good...


Hi and welcome to FixYa,

Initially, the speaker of course has been checked?

Offhand, would partial schematic of the mic and speaker section help?

7008f3b.jpg

Good luck and thank you for asking FixYa.

Dec 18, 2009 | Cobra Radio Communications

2 Answers

Help with cb radio


Hello there
here is a link for the scematic ok?
best regards michael

  1. Cobra 29LTD ST, 29WX ST 29LTD ST Owners Manual. 29WX ST Owners Manual. DIAGRAMS. 29LTD ST Schematic Diagram ... WX Schematic Diagram. 29LTD, 29LTD ST, 29WX ST Factory Service Manual ...www.cbtricks.com/radios/cobra/29ltd_29ltd_st_29wx_st/index.htm - Cached

Sep 15, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 29ltd


You have antenna or Coax Problems...

Apr 17, 2009 | Cobra 29 LTD CB Radio

1 Answer

Cobra 75 wx st


Hi and welcome to FixYa,

Initially, pls a couple of ideas you may want to consider/explore or try/check:
  • PA/CB switch must be to CB;
  • RF Gain max clockwise;
  • Squelch counter clockwise;
  • Volume to your desired level;
  • Mute (off);
  • external speaker/speaker connection;
  • audio amp, verify if there is TX modulation;
  • antenna, antenna cable. SWR should be low.
Good luck and Thank you for using FixYa. Happy New Year.

Pls be informed that due to my current rank and rating, even a Helpful would be detrimental to my status. Should this solution not address your concern, it would be appreciated if you could just not rate this at all. Cheers.

Jan 01, 2009 | Cobra 75 WX ST 40-Channels Handheld CB...

1 Answer

Low volume and problems with squelch


Check your speaker for a short.

Jul 06, 2008 | Cobra 29 LTD CB Radio

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