tone stack bypass mod for Champ?

Discussion in 'Shock Brother's DIY Amps' started by Ringo, Feb 19, 2009.

  1. Ringo

    Ringo Poster Extraordinaire

    Mar 16, 2003
    Memphis TN
    I just picked up a beater SF Champ, the speaker is bad anyway so I may go with a 10" speaker for more volume and better tone.
    Some years ago I had a Champ, someone kindly provided me with a prewired push pull pot and instructions on replacing the volume pot, when pulled out the switch bypassed most of the tone circuit for a rawer Tweed Champ tone.
    It was pretty cool, not something I'd use all the time, but I'm interested in doing that again.
    If anyone has some info on that mod please post it or send it to me.
  2. celeste

    celeste Friend of Leo's

    Jun 24, 2006
    The switch would break the ground connection to the bass pot. It could be on ether side of the 15K resistor.

    Passive tone controls work by bleeding part of the signal to ground, breaking the ground connection stops the bleeding and gives you more signal at the next stage.
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