Enclosure not stated · 5 knobs
Snouse Black Box Overdrive 2
Based on the Snouse Black Box Overdrive 2
From the post
Yet another modified Bluesbreaker. Did some mods that might be useful. First, Drain, resistors for the J FETs is replaced with trimpots for easy biasing. Two: internal DIP switches is replaced with external toggle switches.. The 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 37 rows
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Check before you build · 1 value the reader of this layout was not sure of
- 2.2uF and 10uF at the top right (rows B-C, columns 16-18) are drawn as translucent circles: taken as electrolytics
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×5 | 1M | 1M | read from the layout by eye | |
| ×2 | 100Ω | 100 | read from the layout by eye | |
| ×2 | 12K | 12k | read from the layout by eye | |
| ×2 | 6.8K | 6.8k | read from the layout by eye | |
| ×2 | 47K | 47k | read from the layout by eye | |
| ×1 | 33K | 33k | read from the layout by eye | |
| ×1 | 240K | 240k | read from the layout by eye | |
| ×1 | 27K | 27k | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| Capacitors 9 | ||||
| ×6 | 10nF | 10n | read from the layout by eye | |
| ×4 | 100nF | 100n | read from the layout by eye | |
| ×1 | 1nF | 1n | read from the layout by eye | |
| ×1 | 10pF | 10p | read from the layout by eye | |
| ×1 | 470pF | 470p | read from the layout by eye | |
| ×1 | 220pF | 220p | read from the layout by eye | |
| ×2 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×4 | 1N4148 | 1N4148 | D1-D4; read from the layout by eye | |
| D5 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q2 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | TL072 | TL072 | read from the layout by eye | |
| Potentiometers 5 | ||||
| Preamp | B250K | B250k | Potentiometer | read from the layout by eye |
| Gain | C100K | C100k | Potentiometer | read from the layout by eye |
| Tone | B25K | B25k | Potentiometer | read from the layout by eye |
| Presence | B50K | B50k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×2 | 50K | 50k | read from the layout by eye | |
| Switches 3 | ||||
| Boost | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| Clip | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| Smooth | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |