Monday, October 3, 2022

UNIVOX: Common Super Fuzz Mods

While cleaning up some old posts, I thought I might turn back on one of my old favourites - the Univox Super Fuzz.

Here are some common mods on LTspice.

STOCK SUPER FUZZ SCHEMATIC

STOCK SUPER FUZZ SCHEMATIC


TONE POT MOD


It's a nice simple one and the most common mod.  The tone switch is replaced with a pot to sweep between the notch and unfiltered outputs.  I think, in the process, this actually reduces the depth of the notch.




SUPERFUZZ NOTCH POT MOD



Another common mod - this time, the pot dials in the notch.  There is no unfiltered output, just varying degrees of the notch.




SUPER FUZZ DIODE POT MOD


This one can be a bit more subtle tonally, as it doesn't specifically effect the frequency response - the pot dials in a bit of extra resistance before the diodes hit ground.  Given the signal is already heavily clipped before it hits the diodes, this one is often referred to as changing the 'body' of the fuzz and is a little rougher around the edges.




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