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  1. C

    Cobra 29 Constant Key Up

    I can do that when I get back but the transistor works. I swapped it with another radio with no change. The other radio works fine with the transistor from the nonworking radio. I can’t recall those voltages off the top of my head but I believe the trace for the collector, middle leg, was...
  2. C

    Cobra 29 Constant Key Up

    Thanks for that. And FYI all 3 legs of TR21 are w/in .1v of 8 volts at all times.
  3. C

    Cobra 29 Constant Key Up

    NZ8n Everything back to stock: Radios stays keyed up. Red TX light is on. R95 lifted: Radio unkeys (no rf power output) but red TX light still stays on.
  4. C

    Cobra 29 Constant Key Up

    Sorry, I failed to mention, I replaced it.
  5. C

    Cobra 29 Constant Key Up

    Thanks. I replaced c117 w/ new. TR21 still receiving ~8vdc Thanks Nomad. Middle leg is receiving 8 volts. Desoldering center leg unkeys radio. Trying to trace down the short. Thanks Nomad. Middle leg is receiving 8 volts. Desoldering center leg unkeys radio. Trying to trace down the short...
  6. C

    Cobra 29 Constant Key Up

    Update: I was in the correct area yesterday as I was trying to trace down the issue. TR21 has 7.24/7.93/8.05 volts to each leg. Unsoldering center leg unkeys the radio. Today: Replaced C117 w/ new and no change. Lifting r95 also unkeys radio.
  7. C

    Cobra 29 Constant Key Up

    Thanks. I’ll be checking all these things the first chance I get today. Will let y’all know.
  8. C

    Cobra 29 Constant Key Up

    I’ll get back at it tomorrow.
  9. C

    Cobra 29 Constant Key Up

    I believe this is the schematic https://web.archive.org/web/20190712225721/http://www.cbtricks.com/radios/cobra/29ltd_chr/graphics/cobra_29ltd_chr_sch.pdf
  10. C

    Cobra 29 Constant Key Up

    It’s pretty much a new radio. Cobra 29 Chrome.
  11. C

    Cobra 29 Constant Key Up

    Which one is that?
  12. C

    Cobra 29 Constant Key Up

    Radio keys up constantly (with or without a microphone). Besides that, everything works. A quick check of PTT pin 3 does NOT show a short to ground. What info can I provide for further help?
  13. C

    Galaxy DX2547 No Receive Audio - GNF affect

    Well, that was easy. J413 was plugged in backwards. The nf board was only receiving power when the galaxy noise filter button was pressed. Thanks alot guys.
  14. C

    Galaxy DX2547 No Receive Audio - GNF affect

    Finally had a little time to check this out. The new part did not resolve the issue so I need to start checking voltages etc. will update.
  15. C

    Galaxy DX2547 No Receive Audio - GNF affect

    Will have to see if it does the trick. I’ll let y’all know. Thanks for the help. https://stores.goldeneagleradios.com/anf-gnf-ic-assembly-complete-dx959-and-other-models/
  16. C

    Galaxy DX2547 No Receive Audio - GNF affect

    I’ll contact Galaxy and see if they have a part or I’ll look at Barkett Electronics @ GoldenEagleRadios.com.
  17. C

    Galaxy DX2547 No Receive Audio - GNF affect

    Have a little time to get back at this. I jumped the input to the output and sound immediately came back; temporarily as long as the jumper was connected.
  18. C

    Galaxy DX2547 No Receive Audio - GNF affect

    thanks, everybody. I’m going to get back on it tomorrow. I wouldn’t be surprised if it’s as easy as one of the plugs being plugged in backwards. Wouldn’t that be nice?
  19. C

    Galaxy DX2547 No Receive Audio - GNF affect

    Thanks. It’s a weird deal.
  20. C

    Galaxy DX2547 No Receive Audio - GNF affect

    Dx2547 base - 69000 board. Same as dx959 mobile *No receive audio **If I press the GNF (galaxy noise filter) the receive audio then works. Smh Receiving signal fine PA audio works Talkback audio works TX audio works
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