Enclosure not stated · 2 knobs
Jack Deville Vintage Two-Knob FuzzVerified
Based on the Jack Deville Vintage Two-Knob Fuzz
From the post
I've been wanting to do a Fuzz Face with on-board pots for a while, and when I stumbled across a schematic of Jack Deville's (Mr. Black) take on the classic circuit, things just fell into place. This uses NPN germanium transistors (though you could use silicons if you must), and I tried to leave plenty of room for them if you're using some of the big Russian germaniums easily available off eBay (GT404, MP38, etc). You could build a standard Fuzz Face on this board, just mind the component changes and replace the resistor from Fuzz 1 to ground with a jumper.
Update 5/4/15:
Verified this last night. Here's a pic of my build.
Used some Russian мп38 germanium transistors (Q1: 80 hfe Q2: 110 hfe) and a 7.5k resistor in place of the 10k trimmer (ran out of those). For the input cap I tried out a couple different values (47n, 100n, 220n...) but settled on 39n, as it seemed to give more clarity that higher values. Socket and experiment.
Schematic
This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.
Parts list 15 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 820Ω | 820 | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | NPN germanium | NPN GERMANIUM | Q1, Q2; legend: Q1-2: NPN germanium; read from the layout by eye | |
| Potentiometers 2 | ||||
| Volume | A500K | A500k | Potentiometer | read from the layout by eye |
| Fuzz | C1K | C1k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10K | 10k | set to ~4.5v; read from the layout by eye | |