Modding GCB95 Crybaby to sound like something Hendrix or Clapton would've used

Discussion in 'Burnt Fingers DIY Effects' started by Tom Freeman, Jun 14, 2016.

  1. Tom Freeman

    Tom Freeman TDPRI Member

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    May 11, 2016
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    Toronto
    This has probably been asked many times before, but what are the best mods to do to a crybaby wah if you're looking for a more vintage tone? I want to get a kind of sound like Cream-era Clapton, Hendrix, Truth-era Jeff Beck, etc.

    My wah is a run of the mill GCB95, and appears to have a red fasel in it. If it matters, I'm planning on converting the pedal to true bypass at some point.

    Thanks to anyone who has any suggestions as to how to change the sound the way I want.
     
  2. fraser

    fraser Tele-Holic

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    Location:
    Hamilton, Canada
    what i did was compared the schematic of an old clyde mcoy wah with my crybaby and swapped the values to match.
    was just a few parts and it got me almost bang on.
    didnt mess with the inductor or pot.
    i did swap the little cheap caps for nicer ones though.
    cost me a few bucks is all.

    did another crybaby to match the old coloursound wah as well.

    in the morning ill look for my notes on it-
    in the meantime, just google up the schematics for the clyde mccoy
    and compare them to the modern crybaby.

    they are already close.
    most important was swapping the 33k resistor coming off the inductor for a 100k-
    gets you most of the way right there.
     
    earsfull likes this.
  3. Iago

    Iago Friend of Leo's

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    Location:
    Brazil
    I think you have to try a few mods and see what it works for you.

    I always felt Hendrix's wah was a little throatier, which I liked, so I changed a cap in my BudWah (the "CF" cap from 10nf to 15nf) to get more bass and kill some of the hum and shrilllness from the toe-down position.

    The "Q Resistor" mod is a must try. I tried 47k, 51k, 56k, 68k and 100k and my favorite was 56k, but it's all a matter of personal taste.

    Another mod I've done was changing the 1.5k resistor to 2k, so the mids cut through better with the toe-back position and the lows don't sound so muffled. With all that done, I consider it a 100% better wah.

    A couple cool articles:
    http://www.geofex.com/article_folders/wahpedl/wahped.htm
    http://www.electrosmash.com/crybaby-gcb-95
     
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