Enclosure not stated · 3 knobs
Monolith Oracle FuzzVerified
Based on the Monolith Oracle Fuzz· 4 other boards clone it
From the post
This is a pretty cool fuzz box. It's a cross (sonically anyway) between an early Vox Tone Bender and a Big Muff. It uses PNP germanium transistors, but still uses a negative ground power supply. Originals have OC76 transistors with hfe of around 100 for Q1 and 300 for Q2. 300 is high for most PNP germ. devices and might be hard to source, but I've read of people using trannies with typical Fuzz Face gains (70, 100) with good results. The switch on the original is a push/pull on the 250k pot, but a DPDT switch can also be used.
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 20 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 820Ω | 820 | read from the layout by eye | |
| ×2 | 100K | 100k | one on the board, one on the switch; read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 12K | 12k | on the switch; read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 47pF | 47p | read from the layout by eye | |
| ×1 | 56nF | 56n | read from the layout by eye | |
| ×1 | 6.8nF | 6.8n | read from the layout by eye | |
| ×1 | 1uF | 1u | read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | OC76 | OC76 | PNP germanium, hfe 100; read from the layout by eye | |
| Q2 | OC76 | OC76 | PNP germanium, hfe 300; read from the layout by eye | |
| Potentiometers 3 | ||||
| Density | B1M | B1M | Potentiometer | read from the layout by eye |
| Color | B250K | B250k | Potentiometer | read from the layout by eye |
| Output | A500K | A500k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Switch | DPDT on/on | DPDT ON/ON | toggle, with the 100K and 12K resistors on its lugs; read from the layout by eye | |
Other boards based on the Monolith Oracle Fuzz
- Monolith Oracle Fuzz Dirtbox Layouts
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- Monolith Fuzz Oracle Tagboard Effects
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