Jcm 900 Power Transformer

Discussion in 'Marshall Amps' started by Utincutin, Aug 12, 2016.

  1. Utincutin

    Utincutin New Member

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    Hi peeps,

    I recently acquired a 1997 JCM 900 4100. It's in a bit of a rough shape with some pots that need replacing, along with a missing reverb tank. What i also noticed is that the power transformer is different than all the other 900 pictures. It is oriented vertically and it has a label on it that says "JMP100 February 2004". The amps serial dates it to 97', so i know this is not stock. My question is, is this PT hurting the amp, is it an improvement, or what is the deal.

    Thanks

    PT 900.JPG 01010_5jO6RMXXQT7_1200x900.jpg
     
    Last edited: Aug 12, 2016
  2. Matt_Krush

    Matt_Krush Well-Known Member

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    Hurting? I doubt it. As long as the correct voltages are being produced from the windings then there is nothing to be concerned with.
     
  3. danfrank

    danfrank Well-Known Member

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    That's not the power transformer, that's the output transformer. It's made for a 100 watt EL34 Marshall which is what you have. I have no idea who made it; aftermarket maybe?
     
  4. Rokinroller

    Rokinroller Well-Known Member

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    That's not a stock 900 OT for sure . As long as its working , no prob .
     

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