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.

Tuesday, February 27, 2018

Vertex Steel String

Here's a relatively new effect from Vertex–the Steel String Clean Drive. It's supposed to sound like a Dumble amp and is 2 muamps going into a BMP tone stack. Schematic can be found here.

More progress with the tutorial. Actually wrapping up the DIYLC portion before moving onto the Photoshop bits.


  1. Hell yeah, a simple Dumble style OD! Awesome

  2. Tag it and bag it, this one is verified. Awesome pedal.

  3. Will this work of the bat without being able to trim the transistor drain voltage? and how does one know which type of transistors and capacitors to use?

    1. Because the transistors are in a muamp set up they should work without biasing. If it doesn't work, it's probably more likely an error elsewhere in the build, or transistors that are really out of spec. Transistors are J201s and caps are whatever your preference is.