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Search results

  1. J

    Cobra 138 23 Channel, SSB Manual

    I have the Sams book for that radio, I no longer have a scanner but i can try to take a clear photo of it and post it later on this afternoon,
  2. J

    Can A/c that goes thru a tramsformer share a "ground" with a D/c ground?

    Yes sir! Thank you! I was pretty sure it would be ok, but i have learned long ago to ask of those who know much more than myself, Now i can continue and feel safe. Again thank you!
  3. J

    Can A/c that goes thru a tramsformer share a "ground" with a D/c ground?

    Hello again Next project and i need help with. I read that its a no-no to have A/c and D/c use the same ground if it is transformer less. I am removing the 12vac that is powering a pair of 6 volt tubes and am replacing it with a19 volt transformer and a bridge rectifier and filter cap. As i am...
  4. J

    Troubleshooting Muddy buzzing receive D&A Mavrick

    THANK YOU!!! You have given me a whole lot to do and try. I really appreciate the step by step guide. I will go though each step very carefully and will wait a week and post back and i really hope i will be thanking you even more. Off to my workbench. And It is a MDX200 it does not have a rec...
  5. J

    Troubleshooting Muddy buzzing receive D&A Mavrick

    Thank you for the response, What should i be looking for? Some kind of hint? I do not see anything that looks burned or damaged. I can follow schematics and i can test parts but after that i am lost.
  6. J

    Troubleshooting Muddy buzzing receive D&A Mavrick

    thank you, it does seem that that is the next area for me to try. I am planning on switching tubes as soon as i rebuild the filament power. I do have one spare set of old NOS TUBES in six volts, I will test those and then if that does fix it i will then do the upgrade to higher voltage tubes.
  7. J

    Troubleshooting Muddy buzzing receive D&A Mavrick

    Well i replaced all the caps and it did not fix the problem. I also cleaned both relays with a dollar bill and Deoxit and the problem still is there. Anyone else have any ideas? Can a tube cause that kind of problem? Its driving me crazy trying to troubleshoot?
  8. J

    Troubleshooting Muddy buzzing receive D&A Mavrick

    Hello I have been trying to figure out the problem with a D&A MDX200/Mavrick that has been sitting in my fixit stack. When its pluged in and turned on it works fine for a while and then after sometime when listening the audio from the radio starts to become muddy or buzzy? Its not a 60cycle hum...
  9. J

    Another Cobra 2000gtl Question

    Thank you, I would have thought that if thats the case the PA would not work or work correctly? As mine works just like it should? Oh well i guess i will just leave it as is.
  10. J

    Another Cobra 2000gtl Question

    Hello again, So As i am doing my alignment i noticed that on my board i am missing TR27. Now i know not every mark part on the PC board is used, But i did look at the parts list from the manual and it does show a part. So i have searched the web the last day or so looking at every "MOD" i could...
  11. J

    CB Modification Website

    I thank you so much, This is a goldmine of information in one place. You sir have done a great job! I thank you for doing it.
  12. J

    CB Modification Website

    Ok this time i got the Server upgrade in progress. But that is a great looking page holder!
  13. J

    CB Modification Website

    Hmmm I just tried but nope......
  14. J

    What do i really need to align a CB radio?

    i do have one also. I also have a Sencore CB42 CB analyzer.
  15. J

    General Electronic Part question

    Sounds like a great idea, I will test them tomorrow. Thank you.
  16. J

    General Electronic Part question

    I did think that it looked like a MOV but when i did a search of schmatic symbols i did not see any like that "SA" and the only MOV i have ever seen were blue. Anyways when i just looked up MOV symbol it is not the same as on the schematic. I will go thru my parts bin to see if i have any. For a...
  17. J

    General Electronic Part question

    Hello, I long ago blew up my old trusty Micronta 22-220 fet Vom. What ever i did when i switch over to the audio cont. checker it just has tone always no matter what i do. Everything else works on it but i really want that feature back. I opened it up and found the part that was destroyed...
  18. J

    What do i really need to align a CB radio?

    When i said old well its a Radio Shack/Micronta 22-220 FET VOM anolog Is that old enough?
  19. J

    What do i really need to align a CB radio?

    All right i have fixed the problems and recapped my Cobra 2000gtl, Now i am ready to tackle the alignment. All of my Sams's books call for using a VTMM along with Signal generator, Scope . Now i do really need a VTMM? I have cheap and good DMM i even have a Old analog voltmeter. Do i really need...