Skreddy PedalsTM

Circa 1965-1966 style fuzz

A modified and improved version of the oldest fuzz circuit I know of

The Skreddy Pedals™ Bloody Knuckle is an ALL GERMANIUM 3-transistor fuzz.

The original Maestro™ Fuzz Tone was made famous with the Rolling Stones' hit "Satisfaction."  Then the first version of the Tone Bender was made by Gary Hurst, basically a direct copy, only using different transistors and a few different resistor values, ostensibly to give it more sustain.  (also a bit less of an angry bees in a jar thing)

What I've done is...

  1. ...Take that same old design and improve the "Attack" control such that it has a gradual sweep and is very useful all the way from top to bottom

  2. ...Fix the bias, BUT JUST BARELY, so it has plenty of sustain and does not have a gated (on or off) effect.  Instead what it does is it breathes and sags, kind of like a weak tube rectifier in an old amp.  You can defeat the sag effect by simply turning down the Attack control a bit or by adding some neck pickup.  It sags the most with the bridge pickup when droning some low E and playing power riffs on the A string--you can make it almost choke out using this technique.  Fun stuff!

  3. ...Use AC127 transistors, the same germanium devices used in my  Screw Driver and Hybrid Fuzz Driver.  This is an NPN transistor, meaning it uses a standard negative-ground power supply.

  4. ...Improve the sound quality.  The Maestro Fuzz Tone utilized a 100k resistor at the input of the effect, resulting in a weak, low-fi signal.  On the other hand the Tone Bender Mk1 used a 2 megaohm resistor at its output to pad the volume down, again resulting in a low-fi signal.  I am using 100 ohms in series at input (just enough to soften the attack a tiny bit and warm it up) and zero ohms in series with the output (other than the volume pot).  I am instead padding the output signal with a voltage divider, the same way the Fuzz Face design does, giving a clear, well-defined sound.


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discontinued 11-APR-2014

I kinda want to go slow on these germanium transistors right now.  Since this one uses three of them, and it's not even a unique Skreddy Pedals design anyway, I'd rather save the transistors for my Hybrid Fuzz Drivers, which use only one.


Familiar, slightly sick, slightly splatty, a bit of a sluggish attack, but still fairly straightforward and ultimately satisfying & addictive fuzz tones


Level: Gives a healthy amount of volume unlike some originals

Attack: Useful range from top to bottom, from spitting, sustaining, saggy fuzz to robust, full-bodied distortion to grungy, under-powered dirt


The two songs that inspired me to make this pedal were "What is Life" by George Harrison (the opening fuzz tone riff) and the rhythm guitar in the song "Baby Blue" by Badfinger.  You can get the former fuzz tone effect by turning up the Attack control all the way, and you can get the latter grungy rhythm tone by turning it down a great deal.  Also does a lot of Zeppelin type fuzz tones.

This pedal works best when driven by a strong pickup like a humbucker.  But, you do not want to run active pickups into it, nor have a boost of any kind in front of it.  Works great after wah pedals, though!  (remember Mick Ronson)

Does a nice liquid/"woman" tone using the neck pickup playing leads on high frets, too.  It's not all about fizz and spit and glitchiness.  There is still a fair amount of your guitar's actual sound coming through!

US orders will be sent via USPS Priority Mail (signature required).

International orders will be sent USPS Global Priority (where available).

We will not declare your package at a lower value for customs; be prepared to pay your country's import duty when you receive the package.


It uses typical, normal 9v negative-ground; no special power requirements at all.

9v battery is not included.
If you use a battery, then remember to un-plug the input cable from the pedal’s input jack when not in use to prevent draining (or you can also just plug in a power-supply, which disconnects the battery).

You may supply external power through an AC adapter.  All Skreddy Pedals accept the industry-standard 9v DC plug (5.5mm barrel x 2.1mm center coax), negative tip.  Please use a quality, regulated, filtered power supply.