Enclosure not stated · 3 knobs
Fulltone 70Verified
Based on the Fulltone 70· 1 other board clones it
From the post
For #fuzzfriday, here's the Fulltone 70 fuzz. Like the Fulltone 69, the 70 is a tweaked Fuzz Face circuit, following the silicon version. Like the original silicon Fuzz Face it uses BC108 transistors, though others can be used. Q2 should be higher gain than Q1. One of the nice things about the 70 is the added Mids control, which adjusts the some of the voltage reaching Q2 and the output capacitor. You can board mount the pots using right angle PCB mount types from the solder side.
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 19 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 220Ω | 220 | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×2 | 10pF | 10p | 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 | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N914 | 1N914 | read from the layout by eye | |
| D2 | 1N34A | 1N34A | read from the layout by eye | |
| ×1 | 1N4001 | 1N4001 | printed 4001; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | BC108C | BC108C | legend: BC108c or 2SC1815; read from the layout by eye | |
| Q2 | BC108C | BC108C | legend: BC108c or 2SC1815; read from the layout by eye | |
| Potentiometers 3 | ||||
| Fuzz | C1K | C1k | Potentiometer | read from the layout by eye |
| Mids | B1K | B1k | Potentiometer | read from the layout by eye |
| Volume | A250K | A250k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 5K | 5k | read from the layout by eye | |
Other boards based on the Fulltone 70
- Fulltone 70 Tagboard Effects