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President Jackson export does not key

Discussion in 'CB and Export Equipment and Accessories' started by Lkaskel, May 24, 2021.

  1. nomadradio

    nomadradio Analog Retentive

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    Probably the smartest thing to check first.

    73


     
    Dmans likes this.

  2. Lkaskel

    Lkaskel Active Member

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    Alright men, here is my update (after being out of town for work for a few weeks). I decided to start with a re-cap as that would need to be done anyway. Don't you know, after that it began transmitting. YAY!!!! The alignment doc (service manual) I downloaded had a number of errors in it but I was able to get it through an alignment as well. The only issue I see is that on AM transmit it the power shows a backwards reading on my bird meter when I set it to 10 watts (per the manual). I re-aligned the transmit section again and the only way it will forward drive is if I set it to 5 watts. I am wondering if the alignment specs are not right. The manual I used is from CBTricks President/Jackson.
     
  3. Dmans

    Dmans Sr. Member

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    Lkaskel,
    I just finished one of these a week or two ago for a friend using the same manual and the attached as a "supplement". The attached is Lou Franklin's work and has some good tips for this chassis. (Check page 18 AND 19).

    http://www.zen96216.zen.co.uk/cb/uniden-esm.htm


    I am pretty certain that bad and leaky electrolytic kept the one I repaired from transmitting as well.

    Good Luck

    73
    David
     
  4. 999

    999 Well-Known Member

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    That is very typical of the Jackson. Every one that I have seen does that. You will see good forward peak numbers, but the average swings backwards on AM.
     
    tecnicoloco likes this.
  5. nomadradio

    nomadradio Analog Retentive

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    The AM modulator in that radio is the same chintzy circuit used in the HR2510 radio. Not a record-setter.

    73
     
    tecnicoloco likes this.

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