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 13, 2015

Orpheum Fuzz

For #FuzzFriday, I give you the Orpheum Fuzz. There seems to be several versions of this circuit (germanium and silicon), but it's essentially a FuzzRite. Since I've already done a FuzzRite layout, I thought I'd do a different one with onboard pots. It's meant for use with silicon transistors, but you could use some NPN germaniums if you want. 100-150 hfe should work nicely for both.


  1. The circuit started working only after installing a 1M resistor between the base and the collector of the second transistor.

    1. Thanks for catching that. Layout has been updated. Good to go now.

    2. As a result, I put the resistor at 2M, to saturate the fuzz. And the second transistor can be replaced by a Germanium (Soviet MP36A Nfe 37, 1 MHz) sound juicy is not so dirty) If you swap it with the first transistor, there will also be an interesting sound)Q1-2N2222a or rus KT3102Г Hfe 643 (more frequencies). Q2-2N2222a,2N3904,bc547, or Ge soviеt МП36А, КТ312В.
      Thanks to your site and success.