1590B · 2 knobs
ProAnalog MkIII Fuzz
Based on the ProAnalog MkIII Fuzz
From the post
Here's a variation of the classic Tone Bender Mk II Professional from ProAnalog Devices. It uses PNP transistors, so you'll have to use either a battery or voltage inverter to daisy chain this with other pedals. It seems they've used several different transistors, but they're outlined in the schematic from Scotty himself. Easy fit in a 1590B. And if you want to make it as a negative ground effect, use NPN germanium transistors and flip all polarized components in the layout.
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 21 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 1.8K | 1.8k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×2 | 47pF | 47p | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4001 | 1N4001 | printed 4001; read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | PNP Germanium | PNP GERMANIUM | legend: Q1-3: PNP Germanium; read from the layout by eye | |
| Q2 | PNP Germanium | PNP GERMANIUM | read from the layout by eye | |
| Q3 | PNP Germanium | PNP GERMANIUM | read from the layout by eye | |
| Potentiometers 2 | ||||
| Fuzz | C1K | C1k | Potentiometer | read from the layout by eye |
| Level | A500K | A500k | Potentiometer | read from the layout by eye |