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 to, you can have almost no notch… but why???
I usually like to include an octave pot in my builds, but I decided to keep the knob count down on this one. Easy enough to add; there’s space for this if you want to add it.
UNIVOX SUPER FUZZ – NOTCH FILTER MOD – VERO LAYOUT
UNIVOX SUPER FUZZ – ON THE BENCH
I used a few old transistors for low gain and a Motorola dual transistor for the long-tailed pair. The diodes are Soviet-era D9B, not that it makes much difference on a Super Fuzz (they don’t really do much).
I intentionally made a few resistors standing to leave room around the many 10uf capacitors and the sizeable dual transistor. 2 x 47uf capacitors have been used instead of the usual 100uf on the power filter, as the 100uf was too cramped.
