This is a library of perfboard and single-sided PCB effect layouts for guitar and bass. I'm not an electrical engineer by any stretch of the imagination, just a DIY'er who likes drawing layouts. It is meant for the hobbyist (so commercial use of any of these layout is not allowed without permission) and as a way to give back to the online DIY community.

Friday, January 30, 2015

Maestro FZ-1S Super Fuzz-Tone

The Maestro Super Fuzz-Tone was introduced in the early 70s.  It uses 6 transistors, 2 of which are used as clipping diodes. Original transistors were 2N5133s, but 2N5088s or BC109Cs can be good subs. I've built 2 clones of this pedal in the past (though not with this layout) and used 2N5088s with good results. The original Balance control was a 30k dual gang pot, which you would probably have a very hard time sourcing. In both my clones I used a 50k with no problems, but if you want you can put 82k resistors between lugs 1 and 3 to get the dual gang pot to around 31k, though it will mess with the taper some. Said Balance control acts almost like a clean blend, and the switch offers 2 different tones. If you're tired of Big Muffs, give this one a try. Works great on bass too.

Here's a couple really short demos I did on guitar and bass on one of the clones I built a few years ago (pardon my butchering of a couple Black Keys songs).


  1. Love the FZ-1S clone I bought from CBC Pedals. Captures that late 60's/early 70's Biker Flick fuzz tones. While the masses are happy with the Big Muff variants, I'll stick to the weird, often ignored fuzzes!

  2. Verified.

    The Balance control works pretty well. The in-between positions sound like two guitar tracks, one fuzzy and one clean, playing simultaneously.

    The thin position on the tone switch is louder than the full-range position. Someone on the vero site suggested lowering the 470k resistor off the switch to a 180k to even out the volume levels.

    The Sustain pot controls how fast the fuzz side decays, rather than working as a normal gain control as I'd assumed. The decay always sounds a bit glitchy at the end, though.

  3. Anyone have an idea what would cause the balance knob to effect both signals identically instead of inversely?