Put a working radio in a new truck, and now there is no audio receiving signals

Discussion in 'CB Radio Forum' started by Saienga, Apr 3, 2020.

  1. Saienga

    Saienga Medium Load Member

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    Forgive me if this question has been asked. I had some issues navigating the search function.

    So. Cobra 29LTD Chrome. Also regular Cobra 29. I've tried both CBs in this W900 that I've just gotten into, and I can transmit and receive. I have a decent carrier, because if I call out a radio check, I'll get responses indicated by the needle clearly jumping in proper signal fashion. But I've got no audio. Either from the CBs themselves or from the external speaker built in to the truck. My personal external speaker is at home, so that's not an option.

    For both radios: Squelch is wide open. Rf gain is all the way up. Dynamike 100%. No ANT light on TX. I'm getting dirty background according to the needle. Internal SWR says antennas are a little long (again, both radios), but acceptable. I get out well enough for folks to hear me over short distances, at least, because I get clean signal responses. But no audio.

    My 29LTD worked just fine 2 weeks ago in the previous truck, and it didn't face temperature extremes or rough handling in the vacation between trucks.

    Help me Obi-Wan Kenobi...
     
  2. Night Stalker10

    Night Stalker10 Heavy Load Member

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    Are you saying you have no audio in the receive mode of your radio? Are you using the same microphone with both radios?, or are using two different microphones and you have the same symptoms.
    If you're using the same microphone and you have that problem with both radios, the problem is probably in your microphone.
     
  3. Saienga

    Saienga Medium Load Member

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    Yep. No audio in receive. I didn't think of the mic thing. I'll have to try that out. Appreciate it.
     
  4. Night Stalker10

    Night Stalker10 Heavy Load Member

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    It sounds like the wire on pin 4 of the Mic connector came loose. I just noticed you said no receive audio in the thread title...my mistake.
     
  5. Ridgeline

    Ridgeline Road Train Member

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    Stupid question, do you have an external speaker plugged in?
     
  6. Saienga

    Saienga Medium Load Member

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    I've tried both radios with the speaker plugged in and unplugged.
     
  7. craig_sez

    craig_sez Road Train Member

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    Odd that 2 radios in that one trk dont rec..
     
  8. Saienga

    Saienga Medium Load Member

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    Update:

    I pulled apart the connector on the mic cable, and sure enough, one of the wires was snapped off right at its attachment point to the connector. Mic is toast. It could probably (possibly) be fixed, but it's finer work than I want to do, and not something I'm going to pay for. Plus the mic was at least 9 years old.

    I'm going to order a matching replacement and see how that goes. I've gotten compliments on how clean my CB sounds with the Astatic over the years, so why switch ponies mid-race?

    The mic in question
     
  9. craig_sez

    craig_sez Road Train Member

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    I would keep the mic,have it cleaned and a new end put on it.. Not many new mics sound worth the cost...
     
  10. Night Stalker10

    Night Stalker10 Heavy Load Member

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    Well good, glad it was something simple. Thanks for the update.
     
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