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Rfx dummy

Discussion in 'Amateur Radio Modifications' started by Timmydav, Jan 13, 2018.

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How to make my radio talk again

  1. I got ya man

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  2. I do this all THA TIME

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  1. Timmydav

    Timmydav New Member

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    So I installed a rfx 85 on my cobra 29 lx today and got no tx on my radio.I'm pretty new at working on radios and poor but I really dig playing with em! Any way I've checked and rechecked and I didn't miss any parts so why won't it talk it says RX power failure on the radio what do I do.


     

  2. Tallman

    Tallman W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    #2 Tallman, Jan 13, 2018
    Last edited: Jan 13, 2018
  3. Timmydav

    Timmydav New Member

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  4. Timmydav

    Timmydav New Member

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    There was a yellow and a blue wire but the instructions from cb tricks said to cut them off but there was the orange one thats hooked to 12 volts.
     
  5. Timmydav

    Timmydav New Member

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    Plus the red power nd the ground if i touch the center pole of the final snd the driver they both have power. The talllkback workks the meter on the radio comes up as youu key up then drops to zero i have a dosy meter that doesnt even budge..
     
  6. Tallman

    Tallman W9WDX Amateur Radio Member, KW4YJ EXTRA class

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    Can you give me a link to the installation directions on cbtricks?
     
  7. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Wow there is all kinds of stuff you have to do to install it. I was thinking about one of these too but maybe I will get an external amp instead.
     
  8. Chevboy0167

    Chevboy0167 Active Member

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    I don't see any instructions for the LX version on there.... Timmydav, what year is your 29LX manufactured?

    I have seen the older/earlier 29LX guts look and act the same as the regular Cobra 29's. But there may be some minor differences in the new versions. Check out some YouTube vids for a full install on an LX and recheck your work.
     
  9. Timmydav

    Timmydav New Member

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    Well guys I've checke and rechecked my work,took the amp out and put the radio back to stock and still can't modulate confused! I've replaced the final,driver,audio transformer,2 electrolytic caps and it still won't talk!
     
  10. Timmydav

    Timmydav New Member

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    It's a 2015 model bone stock and it worked fine when I started.
     
  11. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Maybe a transistor somewhere went out? Sometimes the magic quits when their circuits are disturbed.
     
  12. Chevboy0167

    Chevboy0167 Active Member

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    Now wait a minute.... first you say it won't TX... now it won't modulate? Which is it? The OP states "RX Power failure". This is a bit confusing.....
     
  13. Robb

    Robb Yup

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    Well then; you couldn't have checked it well enough yet. That much is obvious, since it worked before you started. So you will have to go over every part of the radio that you've messed with and thought you set straight. You are the one with the radio in front of you.
     
  14. Chevboy0167

    Chevboy0167 Active Member

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: Help, Amp, Trouble.

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