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Hammond 125E as OT for Champ?

Discussion in 'Shock Brother's DIY Amps' started by Tapatio, Mar 12, 2018.

  1. Tapatio

    Tapatio Tele-Meister

    126
    Jun 13, 2016
    New Jersey, USA
    I’m thinking of embarking on an entirely scratch-built Champ project. I have most parts on hand including a Hammond 125E OT. My question is: Is this transformer appropriate for this circuit? I know it’s supposed to be for push-pull applications, but would this be OK? What’s the difference between this and say the 125SE (which supposed to be for single ended use)?
     

  2. peteb

    peteb Friend of Leo's

    Apr 25, 2003
    Cascadia
    the PushPull needs a center tap on the primary
    the single ended one does not.
     

  3. printer2

    printer2 Poster Extraordinaire

    May 24, 2010
    Canada
    A single ended amp needs more iron and has a gap to reduce saturation (simple explanation). Use the transformer and do a self-split push-pull circuit. Or better yet do an amp with a phase inverter.

    [​IMG]
     

  4. nasdak

    nasdak Tele-Meister

    171
    Mar 22, 2013
    france
    Don't
    try and find a old little SE vintage transformer, it has to be old and worn to make your champ sing like a real champ :)
     

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