Enclosure not stated · 3 knobs
Exar OD-02 OverdriveVerified
Based on the Exar OD-02 Overdrive· 1 other board clones it
From the post
Recently traced at FSB by VitaliiBobrov, i find this very interesting. Discrete opamp overdrive, that leaves a lot of room for tweaking and modding. Sounds pretty great even as it is. There are never too many discrete opamp designs... /edit - There was an error on the gain pot label. That's now fixed. Also, the telpod-brand pots on the origal unit use A for linear and B for log tapers. So you should use log pots for gain and tone. Anyway. This is verified.
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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.
Parts list 21 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×7 | 10K | 10k | read from the layout by eye | |
| ×3 | 1M | 1M | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×2 | 2.2K | 2.2k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×3 | 47nF | 47n | read from the layout by eye | |
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×3 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| ×3 | 1N4148 | 1N4148 | D2, D3, D4; read from the layout by eye | |
| Transistors 4 | ||||
| ×3 | J113 | J113 | JFET; read from the layout by eye | |
| ×1 | BC550 | BC550 | try other NPN; read from the layout by eye | |
| ×1 | BC547 | BC547 | try other NPN; read from the layout by eye | |
| ×1 | BC560 | BC560 | PNP; try other PNP; read from the layout by eye | |
| Potentiometers 3 | ||||
| Drive | A1M | A1M | Potentiometer | read from the layout by eye |
| Tone | A22K | A22k | Potentiometer | read from the layout by eye |
| Level | A22K | A22k | Potentiometer | try linear; read from the layout by eye |
Other boards based on the Exar OD-02 Overdrive
- Exar OD-02 Overdrive Dirtbox Layouts