Enclosure not stated · 4 knobs
Zzoyds Black Velvet Fuzz
Based on the Zzoyds Black Velvet Fuzz
From the post
Zzoyds modified Dirty Boots by Apocalypse Audio. An extra germanium pre amp stage has been added to convert it from an overdrive into a fuzz. MP38's is fairly low gain NPN Ge so it can be subbed with 2N1302/2N1304, OC140, 104NU71 etc.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 26 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 120Ω | 120 | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| Capacitors 8 | ||||
| ×2 | 270pF | 270p | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | Germanium | GERMANIUM | D1, D2; legend says only Germanium, no part number; read from the layout by eye | |
| D3 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | MP37 | MP37 | legend: MP37/MP38, low gain Hfe; read from the layout by eye | |
| Q2 | MP38 | MP38 | Hfe 60-80; read from the layout by eye | |
| Q3 | MP38 | MP38 | Hfe 60-70; read from the layout by eye | |
| Potentiometers 4 | ||||
| Fuzz | B10K | B10k | Potentiometer | read from the layout by eye |
| Bass | B100K | B100k | Potentiometer | read from the layout by eye |
| Treble | B50K | B50k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |