Some of my prototype and one-off builds. Let me know if you are interested, and I can see if I can make a pedal out of it


SuprFuzz is a derivate of the classic Univox Superfuzz. This is a prototype. It has the standard “Fuzz” and “Volume” controls (“Expander” and “Balance” respectively on the original Superfuzz), and also a “Tone” control that adjusts the amount of midrange scoop (instead of the “Tone” switch on the original, which disables of the filtering). I […]

Two-transistor germanium fuzz

This is a fuzz face style circuit with two NPN Soviet union Ge transistors. It doesn’t have any “fuzz” control, so it’s a one-knobber. Here is a sound clip. After a few seconds I turn up the guitar volume

Three-transistor germanium fuzz

Here’s a Tonebender Mk2 style of fuzz, with three Soviet union NPN Ge transistors. This one has a fuzz control, it is of more use in this circuit a think. Here’s a sound clip, the guitar volume is increased after a while:


This is a classic opamp distortion with some extras. First there is a JFET gain stage, that is like putting a boost pedal in front of an overdrive pedal. Then it is the opamp gain stage that has LEDs in the feedback loop to get a nice overdrive tone. After that there is a combination […]

Anaheim Booster

This preamp/booster pedal is inspired by the preamp section of 70s MusicMan amps. Those amps have opamps in the preamp, and EL34s in the power amp. Sometimes also a 12AX7 as the last preamp stage (one triode) and as the phase splitter (the other triode). This pedal runs on 18V internally (+/- 9V) and has […]

Single Transistor Overdrive

A one transistor overdrive. A common emitter amplifier with variable gain and a pair of clipping diodes. That’s it (such as, for example, the EQD Speaker Cranker, Lovepedal COT50, and many other). Sounds best pushing a tube amp or an overdrive pedal. Works great with bass too since it’s not cutting the low frequencies much. […]

Germanium Treble Booster

It’s more or less a Rangemaster, but with an NPN Germanium transistor and a switch to change between treble boost and a more flat-frequency boost. Great to push an overdriven amp more


Started to make a reverb pedal based on the Accutronics reverb module (known as a “Belton Brick”). As most such pedals, it’s based on the schematic from the application note on Accutronics web site. It has the pre-reverb-filtering from one of the Accutronics schematics, but an added after-reverb buffer and tone control section. There will […]