Cobra 29LX receives but won’t transmit!

Discussion in 'CB Radio Forum' started by Midnightrider909, Nov 11, 2021.

  1. Night Stalker10

    Night Stalker10 Road Train Member

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    Ya I guess this radio does have talk back. Either way TB or PA will accomplish the same thing. I think it also has RF power in diagnostics, but I'm not sure how reliable it is, but the OP can try it.
     
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  3. RoadSideDown

    RoadSideDown Light Load Member

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    I know nothing about CB except at my former quarry job when this happened it meant our squelch was turned up too high. You could hear the other trucks talking, your transmit light would blink but nobody could hear you.
     
  4. Midnightrider909

    Midnightrider909 Road Train Member

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    I tried the PA and no sound at all when I key the mic.
     
  5. Night Stalker10

    Night Stalker10 Road Train Member

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    I'm sorry, I posted incorrectly. The talk back works through the internal speaker. The PA works through the external speaker. The external speaker has to be plugged in the PA jack on the back of the radio.
     
  6. Ridgeline

    Ridgeline Road Train Member

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    Oh come on midnight, pull the radio, take it to any shop and have them test it, you can afford the $20. Chances are it has an audio issue internally,.

    Just so you know the dual antenna system is a combination am/fm-cb antenna system and it is best to run a separate coax to the left side abs mount a new antenna for just the cb, leaving the right one for the am/fm radio.
     
    jdchet Thanks this.
  7. jdchet

    jdchet Medium Load Member

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    Maybe use your fuel points and pick up a new radio for free at a truck stop? I picked up a Uniden PC78 for free with my points at a T/A 3 years ago. It was on sale for $80 and it always works when I need it. I use it as a backup radio for my big radios and when I have to get in a spare truck with a less than stellar antenna.
    https://www.amazon.com/Uniden-PC78L...3DT3,B01MQDYF66,B00A1VSO9M&srpt=TWO_WAY_RADIO

    JD
     
    Midnightrider909 Thanks this.
  8. Midnightrider909

    Midnightrider909 Road Train Member

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    I never use the am/fm. If I was going to continue this career beyond the next 10 days I would get it checked out. I’m guessing it is an internal fault.
     
  9. flood

    flood Road Train Member

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    Have you tried the cb selftest...

    Also have it checked because for some reason some of the cobras will over time get off frequency... display shows ch19 but it's actually transmitting on just above or below that
     
  10. Midnightrider909

    Midnightrider909 Road Train Member

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    I did all of the self tests and calibration described in the owners manual. I think it is probably an internal fault of some sort.
     
  11. mustang190

    mustang190 Road Train Member

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    I believe that those Volvo’s you need a metal post to mount the antenna on?
     
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