Request - here you go & I hope this is what you were after. Could shave off a column or two if that's a bother.
The Fortin is a pretty stock silicon fuzz face with an input blend, a 10k trimmer in place of the usual 8k2 resistor and a 100n cap on the output. A few smallish caps on the collector and base of transistors to tame the fizz. It's not unlike the D*A*M Drag n Fly DF-05 and no doubt a few other fuzz faces with an input blend.
I came across a series of photos of this build on the PedalPCB forum, and there seemed to be a bit of confusion around the schematic. Thought it was worth documenting some of the observed values here for reference.
The board shown below is from the wedge enclosure. There’s also a more pedalboard friendly version, which includes an internal tone control. It looks to be implemented with a trimmer and a capacitor in series at the output of the circuit — not unlike the approach used in a Marshall Supafuzz MKI. I tried a 4n7 in series with a A1M pot on the breadboard - worked just fine. There also appears to be a resistor and a small value capacitor in parallel to ground on the input of the circuit - kind of hard to see that bit, but it looks like 2M and 1300pf.
A few of the capacitor values are non-standard, and there are some variations in the resistor values as well — clearly some biasing tweaks and tuning by ear going on here.
The Zonk / MKI switch is a nice touch. It adds a 2n7 capacitor in series with a 10n capacitor at the input. It’s a clever implementation too - mounting the 2n7 directly on the switch reduces the number of connections back to the board and keeps everything neat and tidy.
They're all impeccably built - amazing work.
Q1: TI 2N1307
Q2: OC45
Q3: TI 2G308
Yes, it's another MKI. I designed this layout based on a Zonk to fit a specific enclosure width. So nothing remarkable, just one for me to use later.
It's missing the 33k resistor that normally sits across the 50k pot, cause I like to use an A25k instead. I sometimes make a few other taste related changes, depending on the transistors, etc.
One that I've probably overlooked a little, given its place in the early history of English fuzz pedals - which was likely inspired by the Maestro...
There was a three-transistor version prior to this called "Fuzzy" which by all accounts is a Maestro. The later versions dropped the input buffer and made the jump from 3 to 9 volts.
These are gated nasty wonders of the fuzz world.
I'd never heard of these until this morning - and I could not believe the second-hand prices of the original... especially considering the new price of a hand-made pedal from the builder.
It's kind of a Timmy x boutique Tubescreamer type thing - can find the schematic here. Dual tin can opamp is required - hope this is the layout you were looking for.
One of my projects - just a MKII layout built to suit a particular enclosure and layout style that I've been working with lately.
The board is just the right size for this enclosure. Most of the assembly is done on a wiring jig first, before transferring it into the enclosure - would be a nightmare to do it any other way.
Sounds pretty good. The OC75 adds some texture without the need to go all out and use three of them. They're a little expensive for that these days. The OC84 are pretty decent.
