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.

Friday, November 25, 2016

CultureJam Stein Fuzz

For Fuzz Friday, here's another one from CultureJam.

The Stein Fuzz is a lightly modified version of the Roger Mayer Stone Fuzz* pedal (which is itself a lightly modified Fuzz Face). The main difference is more standardized part values (the pots mainly). 

It's meant to be a positive ground circuit (center positive, so not daisy chain-able with standard center negative/negative ground effects), but looks like a good candidate to convert to negative ground. The perf side of the layout below reflects the positive ground orientation of parts, and the PCB side reflects negative ground.


  1. I've been trying for hours to get a lot of these smaller pcbs to print on the same page.
    Even with Illustrator, im forced to "trace" the image, which screws everything up.These images look like they are created by a "vectory" program.

    Any ideas?I cant be the first one not wanting to waste a full page of photo paper for one small pcb :D

  2. Atherinas
    put on a Word file and then print

  3. I use Photoshop. Keep Them 300 dpi (like the original) and you'll be fine.
    I normally make a little montage of a couple pcb files to fill out a 160x100mm copper board to make the most out of my materials.

  4. so if a build the pcb the center will be negative?

    1. Yes. Though if you want center positive, just rotate any polarized components 180º and use PNP transistors.

  5. The voltage on the collector of q2 is -6.5 on both my breadboard layout and the perf. The result is with any trim pot resistance of 42k or below it cuts out. On other ff circuits, the voltages at q1 collector is higher (-1.5 vs -.6) and much lower on q2 (-1.5 vs -6.5). Any ideas on how to have the bias work through its entire range and how to balance the voltages closer to a traditional ff?

  6. Can you please verify the output cap value?