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, February 20, 2015

D*A*M FR-70 FuzzRong

This is DAM's take on the silicon FuzzRite. Loud, snarly, and nasty fuzz tones in this circuit. Q1 is a KSP42, which seems to be pretty similar (if not the same) to a MPSA42. I've read of MPSA18s working in that spot as well. Q2 is a 2N4401, which should be easier to track down, though a 2N3904 should work just fine there as well. As always, socket and experiment. The depth pot is listed at 470k, but a 500k will work just fine. I've added power filtering, polarity protection, and an LED resistor on board and the whole thing should fit nicely in a 1590a.


  1. This comment has been removed by the author.

  2. Built and verified! It sounds awesome but it has low volume event with the knob wide open..any suggestions for some mods?