1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

Cobra 148 GTL production date Mar 1989 Phillipines

Discussion in 'CB Radio Modifications' started by JLsenior, Sep 12, 2018.

  1. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    What can you do to turn down the swing. Meter reads 1.5 watts on and needle hits red before I even talk into mic. You can turn the gain down and the dynamike down to no effect. It has been modded with extra freq, clarifier..."peaked and tuned/clipped and snipped.


     

  2. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    20180911_185622.jpg
     
  3. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    R129 is clipped. If I replace this will anything get messed up when powered up?
     
  4. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    So is r44, and d52. If I reatach will my radio burn up on power up?
     
  5. Low_Boy

    Low_Boy Well-Known Member

    Joined:
    Jan 21, 2010
    Messages:
    572
    Likes Received:
    125
    Probably work better and sound better. Those clipped resistors are all doing or should I say were doing something to make your radio not swing and not over modulate. I hate people that butcher radios.
     
  6. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,763
    Likes Received:
    2,432
    R131 clipped?
    TR24 missing?
    Any of the coils deformed/smashed in the back of the radio near the antenna connector?
     
  7. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    No smashed coils
     
  8. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    If I repair those then the swing will go back to what it was from factory?
     
  9. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,763
    Likes Received:
    2,432
    Check the mA on the driver and final in SSB mode.
    Wow, original caps.
    Nnnnnnnn.
     
  10. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    Probably is the scary part of your comment...
     
  11. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    Sounds easy Rob. Can you explain in lamens terms please.
     
  12. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,763
    Likes Received:
    2,432
    Just do it by the book in the Service Manual.
    Otherwise it is a lot to write up; but if must - I will.
     
  13. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    Robb can you post a link to the correct schematic for this model. I had looked at a schematic before I originally posted and thats why I am so lost.
     
  14. Robb

    Robb Yup

    Joined:
    Dec 18, 2008
    Messages:
    10,763
    Likes Received:
    2,432
  15. JLsenior

    JLsenior New Member

    Joined:
    Sep 11, 2018
    Messages:
    17
    Likes Received:
    2
    Thank you sir.
     

Share This Page

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.
  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!