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  1. vswr

    Cobra 142 GTL

    I ised your charts to check the VCO frequencies. Even the skips are at a 10k jump. One fellow said I should replace the 8719 but Its perfect on thevtruth table pin outs. It hascto be a coil, diode, crystal or cap. Disc caps are funny things. Ive seen them shorted, hi and low resistnce short, or...
  2. vswr

    Cobra 142 GTL

    I have my own shop. Im alone there Transmit is spot on.
  3. vswr

    Cobra 142 GTL

    I pick up everyone from 38L on 39L. Superbowl is on 7. 28 is now 29. My SDR is my test radio. Its dead on. The problem is in the 142 receive. No doubt about it.
  4. vswr

    Cobra 142 GTL

    AM transmit is good at 7.800mhz. Channels all transmitnon freq. Its the rx thats 10k off. Cant seem to figure this one out.
  5. vswr

    Cobra 142 GTL

    I have not touched ct1 or ct2 at all. Im still not there becausenof my 20k and clarifier issue. You can seevthe blob of scum that was covering that diode. Im still goingbto clean it properly.
  6. vswr

    Cobra 142 GTL

    Here Ivreplaced the ct3 trimmer and put the 11.11125 crystal back into its home. Notice the blob of solder on the top ofvthat crystal? It was attacedvto the top of 2 other crystals using solder wick. A real mess and obviously overheated.
  7. vswr

    Cobra 142 GTL

    Here is that cap that seens to do nothing.why was it installed during the hack?
  8. vswr

    Cobra 142 GTL

    The red white wire is goingbto a 3.3k resistor. I could have used a better color but its temporary until I sort out all then issues. Here is that disc cap that joins the cut run. As you can see bybthe solder, its a aftermarket hack. Again, it just alters the frequency very slightly and just...
  9. vswr

    Cobra 142 GTL

    As soon as I can get my proper L13 frequency I'll know more. I do have a spare but I dont think its the problem because the truth table checks out.
  10. vswr

    Cobra 142 GTL

    The PLL
  11. vswr

    Cobra 142 GTL

    Great level of instruction there. I appreciate it. My plans though, were to remove all the mods. Technically, I couldnt explain it the way you did, but I knew hiw the circuits work interdependentl and dependently. A good refresher so thanks for that. . Im not having luck sending pics due to my...
  12. vswr

    Cobra 142 GTL

    Ok. I will. I will bebgetting back into this radio in an hour or so. Thanks for your support.
  13. vswr

    Cobra 142 GTL

    Yes. It had a ground strap on it and on the other 2 upper and lower crystals. Did I mention that thiscwas a ebay hack? Full of issues. Im trying to put it back stock. 73s
  14. vswr

    Cobra 142 GTL

    Yeah. I took off 1 lead andnit changed nothing. Im gonna getbthat pic of the cap under the board also...
  15. vswr

    Cobra 142 GTL

    I will look into L24. Thanks. Im using a 100mhz cathode ray tube type scope. The i have avdigital scope also but prefer thhe crt. The C1 and C2 i went nowhere near them as Im still atuck on the first adjustments because my only service info was a sams set with misleading info that has thrown me...
  16. vswr

    Cobra 142 GTL

    Im on it! Thanks!
  17. vswr

    Cobra 142 GTL

    Don't see anything rude there. Lol. I'll bounce it around and see. I did notice a warble in tone when shifting channels and clarifier. The reason why I did this about 5 times is because I had a helluva time with the clarifier when it was unlocked and putting all my money on the 5 volts at L13...
  18. vswr

    Cobra 142 GTL

    Im working at it not that easy. Its horrible andbI have no idea why they just didnt use rtv.
  19. vswr

    Cobra 142 GTL

    Thanks Jeff. Yeah it starts to upload and at around 15% it just stops. I can upload pics no problem. Pdf is another matter.
  20. vswr

    Cobra 142 GTL

    This is the order in which I started the alignment.