Enclosure not stated · 4 knobs
Walus Audio 385 OverdriveVerified
Based on the Walrus Audio 385 Overdrive· 2 other boards clone it
From the post
This one has a pretty interesting backstory. It is supposed to be be based or simulate the tube section of Filmosound projector from the 1950s. After listening t o the demos it seems to be a Tweed style overdrive. Schematic is avaiable HERE.
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 31 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×2 | 15K | 15k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×2 | 33K | 33k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 1.5K | 1.5k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | 5.1K | 5.1k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 39K | 39k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 7 | ||||
| ×2 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×3 | 100nF | 100n | read from the layout by eye | |
| ×2 | 560nF | 560n | read from the layout by eye | |
| ×2 | 10uF | 10u | electrolytic, rated min 25V; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | 1N4148 | 1N4148 | D1, D2; read from the layout by eye | |
| D3 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | J201 | J201 | JFET; read from the layout by eye | |
| Q2 | J201 | J201 | JFET; read from the layout by eye | |
| Q3 | J201 | J201 | JFET; read from the layout by eye | |
| Q4 | J201 | J201 | JFET; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TC1044SCPA | TC1044SCPA | read from the layout by eye | |
| Potentiometers 4 | ||||
| Gain | A1M | A1M | Potentiometer | read from the layout by eye |
| Bass | B100K | B100k | Potentiometer | read from the layout by eye |
| Treble | B100K | B100k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×3 | 100K | 100k | read from the layout by eye | |
Other boards based on the Walrus Audio 385 Overdrive
- 385 Drive Five Cats Pedals · 1590B · £4.50
- Projectile Overdrive PedalPCB · 125B · $12.00