Question about Cobra 29 LTD CB Radio

1 Answer

Cb radio transmitting problems

I get great reception ad ear clearly other drivers but I can't transmit at all I key it and it makes a noise but when I try to tune it the dial on the awe meter doesn't move at all

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Check your microphone and the SWR on the antenna.
SWR checks or bench checks should be free at a RadioShop or CBshops, and normally they will only charge for parts needed.

Posted on May 07, 2013

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Posted on Jan 02, 2017

Benimur
  • 6966 Answers

SOURCE: microphone

Hi,

If the radio receives OK and the TX red LED will not lit up when keying the mic, then it is a mic or mic cord or mic connector problem (or pin configuration). Internally to the mic, there is a switch for keying the PTT. This should be check down to the coiled cord to the connector.

If all of the above checks OK, then you would need to check the TX/RX regulator/switching circuitry.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Posted on Jul 31, 2008

  • 200 Answers

SOURCE: receiving fine but transmitting bad??

First off, that radio will not transmit very well anyways.  but for just off roading it should suffice.  You really should adjust your antenna's both of you.  First off this is almost definitely the problem if you can recieve but not send.  Also if you use the radio without a properly adjusted antenna it will destroy the radio over time, sometimes instantly.  pick up a cheap SWR meter and follow these steps: Plug the SWR meter into the radio, and the antenna. Start on channel 1, the meter should have a switch with 2 settings, one for adjustments and one for reading.  Key up (hold down talk button on mic) with the switch in adjust mode and adjust the knob until it reaches the adjustment marker. flip the switch to reading and key up again. Your goal is to get this reading as close to 1.1 as possible, anything above a 2.0 will damage your radio. if the reading is within range repeat for channels 20 and 40. good luck!

Posted on Jan 22, 2009

  • 773 Answers

SOURCE: cobra 29 ltd classic cb not transmitting

Check the ground. Make sure its grounded well on bare metal. To see if the ground is bad, or not making good connection, disconnect the antenna and turn it on. if it does not power up, that means your ground is bad, and it was grounding only through the antenna.

Make sure not to key up with out the antenna connected.

Posted on Feb 08, 2009

audio20
  • 22 Answers

SOURCE: swr meter not moving.

If the radio is working don't worry about the meter unless you absolutely want it. These little meters are not very accurate or reliable. Get an external SWR meter to check the antenna.

Posted on Apr 23, 2009

  • 2 Answers

SOURCE: No audio Transmit

Try a hand mic with the set, there may be a short within the radio.If not your problem is with the audio amp in the radio itself.Repair should be about $15.00.

Posted on Aug 09, 2009

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Hello Darren, Yes it sounds like the mic is wired bass ackwards,,! A cobra 25 mic wiring is
PIN #1- Shield or ground wire
PIN#2- Audio or Transmit modulation
PIN #3- Transmit or Dead Key
PIN #4- Receive Audio.
When your keying the mic, the RX wires are being connected to make the RX work,,,
*** Let me know how you get along with it. Either buy a new mic wired for your radio or you or someone comfortable with soldering needs to resolder the correct wires back on the mic plug,,,Like I said, let me know and have a great day,, Mechanic is back quiet!

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