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, June 20, 2016

Catalinbread SFT

Here's a really versatile overdrive from Catalinbread. The SFT is based on Ampeg amps from the 70s, using JFETs to simulate tubes (like many of Catalinbread's other overdrives). The Stones/Stoner switch allows you to go from verge of breakup tones to near fuzz tones with the flip of a switch. This can be run off 18 volts and this gives extra headroom, so it may not be a bad idea to include a charge pump in your build. This layout reflects the newest version of the SFT, and the schematic can be found here.


  1. 18v really brings this one alive

  2. Hello,

    Please make PCB for Catalinbread DLS MKIII


  3. The 33k resistor should be 2k2

  4. Verified! I went with J201 for the trannies, a single 2n4393 costs like four pounds here. Also tried with 2n5458 but those made the breakup nasty and sputtery and a bit gated. Now it is really gainy, wonder how it sounds with a set of 2n5457. I wired the switch as the tagboardfx-layout suggests: lug 2 & 3 goes to bottom, and lug 5 & 6 to the top holes.
    Thanks for the layout!

    1. I got my 2n4393s on Aliexpress for less. Didnt use them in my build yet, so i dont know how they compare to j201.

      The tagboardfx uses a differend numbering for the switch imho.

  5. Cool, thanks! Is there any tranny/combination that you prefer?

  6. Hello I had a problem with mine on the stones mode i have a really low gain and volume and when i switch to stoner everything seems like the video. I cheked every value and everything seems correct , the trannies i used are KS4393 which only have different layout from the stock ones. Is there a way i can boost the stones mode a little bit? Thanks in advance