Tools, Tones and Toys for Guitarists
I’ll have to admit that I always thought these two guitar effects were the same circuit – well they’re almost identical; it’s amazing what a difference two resistors can make. That being said – they will sound almost the same on most settings, but there will be subtle differences primarily due to the lower boost … Read more
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 TONE POT MOD It’s a nice simple one and the most common mod. The tone switch is replaced with a pot … Read more
I started this layout ages ago and never finished it for some reason – anyways, here it it, the Univox SQ-150 Square Wave. Mark Hammer mods included below. UNIVOX SQ-150 SQUARE WAVE – VERO LAYOUT UNIVOX SQ-150 SQUARE WAVE – MARK HAMMER MODS – VERO LAYOUT ORIGINAL SQUARE WAVE SCHEMATIC
A quite simple old japanese compressor by Univox. For part substitutions (since stock parts is long gone obsolete…) the transistor were a low gain NPN silicon so PN2222 or 2N3903 should work. MD234 were silicon signal diodes so 1N4148s is a near enough sub. The spec of the original vactrol remains unknown so socketing a … Read more
This is a handy little mod for the Univox Super Fuzz – especially for those who always leave the tone switch on the notch setting. Instead of a tone switch, there’s a pot from the 100n capacitor to ground in the bridged-t notch filter, so the amount of notch can be dialled in. If you really want … Read more
Univox Unidrive boost with Aion FX mods The original Univox Unidrive was a straight boost, with a bit of dirt – it was a large rocker pedal with preset gain levels on a rotary switch, and the rocker controlled the output level, not unlike a regular volume pedal, but with the increased level of a booster. The don’t … Read more
The Univox Super Fuzz is indeed super – possibly my most favourite octave fuzz ever… that was until I discovered the Foxx Tone Machine. It’s now second on the list, although it’s kind of special to me, largely due to Poison Ivy from the Cramps. It’s a legendary fuzz sold under many different names, … Read more
This one has been modified for regular stompbox use and more useful controls. Also a feedback trimpot has been added to achieve more gain on tap. Aion’s Monad projects suggest a 10k trimpot but I suggest a much larger value to be able to turn it into a heavy high gain fuzz.
Not much info on this one, but basically it was a compressor made by Univox in the 70’s as part of their “foot” series. Seems to be loved by many and was recently requested. In addition to the schematic posted in the request section I found another schematic posted over at FSB, so I made … Read more
