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Discussion in 'General CB Services Discussion' started by Ziploc, Aug 31, 2021.

  1. Ziploc

    Ziploc Well-Known Member

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    Morning all, so this just started and is getting more sporadic. I key up and talk the amp is still keyed here click light is on however my needle on radio goes to nothing and my talk back goes silent. I have talk back on to . So basically mid sentence I don’t here myself talking no more radio needle is to zero but I look and amp light is still engaged and keyed? Mic going bad ? Help thanks all .


     

  2. OldTech03

    OldTech03 Sr. Member

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    What does the radio do without the amp turned on/or without the amp in line at all?
     
  3. Ziploc

    Ziploc Well-Known Member

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    Same
     
  4. OldTech03

    OldTech03 Sr. Member

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    Well, then you have a radio problem! can't tell you what it is as it could be many things that are causing it. You are sure the antenna is still functioning as it should?
     
  5. Ziploc

    Ziploc Well-Known Member

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    I’ll meter it tonight thanks
     
  6. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    I have seen a funky microphone switch do this. It keys the radio but does not switch the audio from the mic element. What microphone is it? Maybe just need to clean the switch contacts with some deoxit or wd40. If it does the same thing with a different mic, then the problem is probably in the radio.
     
    AudioShockwav, Ziploc and Slowmover like this.
  7. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

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    Should see a TX light, if not then you are losing TX (LOCK) and so the meter falls to Zero, no Audio in Talkback and it's trying to go into RX mode, but you don't hear it because the TX mode is not locked - to the PLL to produce RF so you can send RF, but the TX mode is enabled, so that shuts down the RX side from even working - on top of; if you have a radio that needs Speaker Return - it's (Microphone Key switch) not there to enable the internal speaker to work (Plunger is in, versus being out sort of thing)- so it sits silent, looking back at you.

    You have to figure out why it's not staying in Transmit.

    Could be many things including a a power supply regulation issue - it's in shutdown mode. May be not the main one, (13.8V) it's the regulated 8V one inside that is shutting down.
     
    Shadetree Mechanic and Slowmover like this.
  8. Ziploc

    Ziploc Well-Known Member

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  9. Ziploc

    Ziploc Well-Known Member

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    Thanks guys. I’ll look into them if not off to R&R Communications
     
  10. Ziploc

    Ziploc Well-Known Member

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    Is there nothing you don’t know . Lol
     
  11. nomadradio

    nomadradio Analog Retentive

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    Well hey, if there is he'll look it up.

    73
     
    Handy Andy and Ziploc like this.
  12. Ziploc

    Ziploc Well-Known Member

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    He’s helped me out every time
     
  13. Ziploc

    Ziploc Well-Known Member

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    Newest update::: so different mics didn’t change a thing. So still mid sentence radio goes silent and needle goes to left however my friends still here my transmission. And yes does it with amp on or off. Some days are worse then others.I believe it’s just old school talk back trucker mod . Please help? Any ideas?
     
  14. CorruptHawkeyez

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    Not sure if I'm just not seeing it or it just hasn't been listed. What radio is this happening on?
     
    Shadetree Mechanic likes this.
  15. Ziploc

    Ziploc Well-Known Member

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    Did you read the whole thread? It’s a comp cobra 29.
     

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