This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Monday, October 31, 2016

CMAT Mods Signa

Got a request for this one. It's a barely modified Tube Screamer with a clipping switch to go between silicon and red LEDs. The switch is a SPDT on/off/on by the way. Gearmandude really seems to like it.


  1. couldn't agree more with Gearmanndude, this is indeed the beAst OD around

    you're awesome as usual buddy

  2. Can you find a schematic and make a Kent 6400 distorter?
    It's got 4 resistors and 5, 15 & 25uf caps, even though it may seem similar to a Schaller fuzz it's different and am keen to hear it. Uses ac 151r transistors.

    I use 47pF instead of 51
    It makes sense now why Gearmanndude loves it XD. it sounds amazing

    thank you for this one buddy,
    you are awesome like usual!!

  4. Thank you! My request was hear. Cmatmods excellent pedal and your layouts too.
    p.s. With the tone of figured out, everything works.

  5. I do not find drilling template for this pedal Dude.

  6. Hello everybody, is it really a 2k tone pot, instead of a 20k tone potentiometer? Thank you very much.

  7. Do you have the scheme please