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  1. HavaV10

    No Mic Audio Cobra 148 GTL

    IC4 voltages RX Pin 1 8.3 Pin 2 14.2 Pin 3 8.3 Pin 4 0 Pin 5 14.4 Pin 6 8.3 Pin 7 not there Pin 8 0 TX Pin 1 8.3 Pin 2 13.5 Pin 3 8.3 Pin 4 0 Pin 5 0 Pin 6 0 Pin 7 not there Pin 8 8.3 Does this look normal or should I replace IC4
  2. HavaV10

    No Mic Audio Cobra 148 GTL

    Also noticed that TR25 and TR26 are missing.
  3. HavaV10

    No Mic Audio Cobra 148 GTL

    I checked voltage at C18 and yes there is 6V positive on both receive and transmit.
  4. HavaV10

    No Mic Audio Cobra 148 GTL

    changed out C18 still no transmit audio. Also changed out all the 10V and 16V caps still the same. Might just change them all out. Think I'm going to replace the CB/PA switch next.
  5. HavaV10

    No Mic Audio Cobra 148 GTL

    tested IC4 this morning. Pin 8 has 8V when Mic is keyed. No voltage on pin 4 of IC4
  6. HavaV10

    No Mic Audio Cobra 148 GTL

    Looking more into the 148 I see that TR25 has been removed it's not there.
  7. HavaV10

    No Mic Audio Cobra 148 GTL

    thanks, yes receives fine on the channel selected. I changed out TR22 and TR23 with no change. There is barely I mean barely audio coming through the mic. Had another radio next to it on the same channel. Super super weak audio I can hear my voice barely but doesn't move the S/RF meter at all...
  8. HavaV10

    No Mic Audio Cobra 148 GTL

    yeah I checked the SM C468 ok to be in there.
  9. HavaV10

    No Mic Audio Cobra 148 GTL

    I found that TR23 C945 transistor has a C458 in that location.
  10. HavaV10

    No Mic Audio Cobra 148 GTL

    not the mic tried multiple ones that work on my cobra 2000
  11. HavaV10

    No Mic Audio Cobra 148 GTL

    Picked up this Taiwan made Cobra 148 GTL the other day. Very clean inside and hasn't been chopped up. No extra channels either. It has a issue, no audio going through when the mic is keyed up. Also the Green/Red led does not turn red when the mic is keyed up. Also no audio coming out of the PA...
  12. HavaV10

    Early President Washington D858

    thanks Mr. Loosecannon it's the weaker signals that have the not so clear audio. They sound very choppy and not smooth sounding like they should. I'll mess with it a little. It's working pretty good right now. The (NO ADMIT) sticker is still covering L2 and has never been messed with.
  13. HavaV10

    Early President Washington D858

    Got it Larry, your awesome! Thank You a ton!
  14. HavaV10

    Early President Washington D858

    I just checked and VR2 is almost maxed out. What is the function of VR2
  15. HavaV10

    Early President Washington D858

    thanks BC for the info. Very interesting.
  16. HavaV10

    Early President Washington D858

    Looking for a .pdf service manual for President Washington. Uniden PC-196AB Thanks
  17. HavaV10

    Early President Washington D858

    Mr. Nomad, hey I looked and looked and I just can't find C605. The PCB is a PC-196AB Uniden. Spent over 20 minutes and couldn't locate that C605 Cap. Help please.
  18. HavaV10

    Early President Washington D858

    Thank you Mr. Nomad
  19. HavaV10

    Early President Washington D858

    Hello all. Just picked up a super clean President Washington manufactured in Japan in late 1977. I friend gave it to me for free. Only issue I'm seeing with it is when on SSB and the NB is pushed in signals sound slightly garbled and when the NB is off the SSB signals sounds good and clean...