1971 cap question

Discussion in 'Let's Talk Vintage' started by Chris4189, Oct 4, 2019.

  1. Chris4189

    Chris4189 Well-Known Member

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    The seller came back and made me an offer I couldn’t refuse honestly. Well below the asking price. The OT is a C1998 and appears to be original to the amp, the PT was replaced at some point and it is a Classic Tone.

    While I totally agree it’s value is shot as a collector’s amp, I think for the price I paid it’s a total players amp. New face plate will cover the MV hole and allow for the pilot light to go back to its original home aside from that my plan of it is to:
    1) check the PT volts and see what this thing is throwing out and replace if necessary.
    2) recap properly and remove the replacements from the board and put bleed resistors on the caps
    3) disconnect the polarity switch
    4) Replace the power tube screen resistors and the electrolytic bias capacitors on the board.
    5. Remove MV completely
    6) see what’s up with the orange aftermarket resistor on V1a cath resistor

    and roll from there.
     
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  2. ampmadscientist

    ampmadscientist Well-Known Member

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    Start the reactor... Free Mars!
    Well I hope you are paying less than $1100 for it.
     
  3. Matthews Guitars

    Matthews Guitars Well-Known Member

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    Just FYI, if you know of any butchered Marshall JMP era amps that can be had for well under 1000 bucks, clue me in on them. You'd be surprised at how far I'd go to restore an amp. If I am willing to have a chassis stripped and re-galvanized, filling in extra punched or drilled holes and making them disappear first isn't too much of a stretch for me to do.
     
  4. South Park

    South Park Well-Known Member

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    If you want a amp to play with you should build one.that amp should be restored
     
  5. Chris4189

    Chris4189 Well-Known Member

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    This one looks a little better inside. Original OT but PT has been replaced
     

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  6. neikeel

    neikeel Well-Known Member

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    The OT is not a C1998.

    Unless they grafted in new wires

    The original C1998 has cloth covered secondary wires.
     
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  7. neikeel

    neikeel Well-Known Member

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    Having looked again - maybe they are?
     
  8. South Park

    South Park Well-Known Member

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    This amp needs to be gone thru if you can’t do the work then is it a deal if you pay some tube tech .
     
  9. Metroman

    Metroman Well-Known Member

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    If I could build amps, Id go to Valvestorm, and buy the best parts they have for whatever amp I decided on, which would be the JTM45/100...... They have Mustard caps, PEC pots.
     
  10. Chris4189

    Chris4189 Well-Known Member

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    I can preform repairs and mods without reservation but I don’t have the time to take a full build on nor do I have the confidence yet to do so.

    I’ve passed on the amp that started this thread. It has more going against it then it does for it IMHO. The search continues.
     
  11. South Park

    South Park Well-Known Member

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    You should take on a build. You would learn a lot
     
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  12. Trapland

    Trapland Well-Known Member

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    I think building an amp is very rewarding. And it’s easier than cosmetic restoration. Cosmetics is an art form.
     
  13. South Park

    South Park Well-Known Member

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    The 2204 is a great build you can source all the parts. You will learn alot
     

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