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.

Wednesday, August 16, 2017

Simple CabSim

Came across this design in researching a different project and thought I'd draw it up. It uses 3 transistors and doesn't take up a lot of space, so you should be able to fit it in a 1590A or add it to another pedal. More info can be found here. Sounds like you can use pretty much any medium-high gain PNP/NPN pair for Q2-3 (2N5087/2N5088, BC560/BC550, etc).


  1. Mark it verified!! Sounds pretty good. Anybody know how I would go about increasing the volume. I tried a NOS 2n5060 and it gave me a signal but was about half the volume of the j201s. I got the j201s from for an upcoming sunn-t build I need to finish.

  2. So i use this in the Effects loop or infront of an amp.

    1. I feel like this is best suited for when you're recording without an amp or playing into a headphone amp. But for a live rig, I'd try it in both places and see what sounds better to your ears.

  3. I'm considering boxing up one of these together with a noisy cricket 1/2W amp. Should i run the noisy cricket before or after the cabsim? Would the amp output would be too loud for the cabsim input?

  4. can i request for a noisy cricket mkII? it would be helpfull for us all.. thanks in advance mr.david.. ๐Ÿ˜„๐Ÿ˜„๐Ÿ˜„

  5. i builded to put it into a diezel vh4 pedal and it sound better than others IR from my computer. I use mesa 4x12 IRs and this can be ecual or better...