Enclosure not stated · 4 knobs
Tokai Metal DriverVerified
Based on the Tokai TMD-1 Metal Driver· 1 other board clones it
From the post
The Tokai Metal Driver was built in Japan in the early-mid 80s and is very similar to the Pearl OD-5 of the same era. In some ways it's basically a Tube Screamer, with the same input/output buffers, but the tone control is rather unique and the sound is apparently very different from your standard TS-9. Original units use 2SC1571 transistors with BCE pinouts, but I've drawn the layout for CBE transistors that you're more likely to have on hand. Here's one of the few demos I could find of it. Skip ahead to around 2:30.
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 24 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×2 | 1M | 1M | read from the layout by eye | |
| ×7 | 10K | 10k | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×2 | 47K | 47k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×4 | 47nF | 47n | read from the layout by eye | |
| ×3 | 5.6nF | 5.6n | read from the layout by eye | |
| ×2 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| ×1 | 1N4001 | 1N4001 | printed 4001; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3904 | 2N3904 | legend: Q1-2: 2N3904, 2N5088, etc.; read from the layout by eye | |
| Q2 | 2N3904 | 2N3904 | legend: Q1-2: 2N3904, 2N5088, etc.; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | 4558 | 4558 | printed 4558, no designator; read from the layout by eye | |
| Potentiometers 4 | ||||
| Drive | B1M | B1M | Potentiometer | read from the layout by eye |
| Frequency | B500K | B500k | Potentiometer | dual; read from the layout by eye |
| Level | A20K | A20k | Potentiometer | read from the layout by eye |
| Bright | B10K | B10k | Potentiometer | read from the layout by eye |
Other boards based on the Tokai TMD-1 Metal Driver
- Tokai TMD-1 Metal Driver Dirtbox Layouts