Enclosure not stated · 3 knobs
BOSS SD-1
Based on the Boss SD-1· 9 other boards clone it
- Category
- Distortion· Distortion Boost and Overdrive
- Price
- see vendor
- Tags
- Distortion Boost and Overdrive
Schematic
The schematic is the archived file. Open it at Experimentalists Anonymous, or browse its folder.
Parts list 36 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- 1N4146: as drawn; likely meant 1N4148
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×5 | 10K | 10k | input, Q1 emitter, after the first op amp, tone-stage feedback, output emitter; read from the schematic by eye | |
| ×1 | 470K | 470k | read from the schematic by eye | |
| ×4 | 100K | 100k | op-amp bias, two in the flip-flop, output pulldown; read from the schematic by eye | |
| ×2 | 4.7K | 4.7k | read from the schematic by eye | |
| ×3 | 33K | 33k | one in the drive loop, two in the 4.5V divider; read from the schematic by eye | |
| ×2 | 470R | 470 | tone leg, DC adaptor (-) lead; read from the schematic by eye | |
| ×5 | 1MEG | 1M | JFET drain bias, two JFET gate resistors, output buffer bias, footswitch pull-up; read from the schematic by eye | |
| ×2 | 22K | 22k | JFET switch sources; read from the schematic by eye | |
| ×1 | 1K | 1k | read from the schematic by eye | |
| ×1 | 3.9K | 3.9k | LED; read from the schematic by eye | |
| ×4 | 56K | 56k | flip-flop; read from the schematic by eye | |
| ×1 | 100R | 100 | footswitch; read from the schematic by eye | |
| Capacitors 11 | ||||
| ×4 | 0.047u | 47n | read from the schematic by eye | |
| ×2 | 0.018u | 18n | read from the schematic by eye | |
| ×1 | 0.027u | 27n | tone; read from the schematic by eye | |
| ×1 | 0.01u | 10n | tone feedback; read from the schematic by eye | |
| ×2 | 1u | 1u | read from the schematic by eye | |
| ×1 | 100u | 100u | 9V supply filter; read from the schematic by eye | |
| ×1 | 47u | 47u | 4.5V reference; read from the schematic by eye | |
| ×2 | 0.47u | 470n | JFET gate; read from the schematic by eye | |
| ×2 | 470p | 470p | flip-flop; read from the schematic by eye | |
| ×2 | 220p | 220p | flip-flop; read from the schematic by eye | |
| ×1 | 0.1u | 100n | footswitch debounce; read from the schematic by eye | |
| Diodes 5 | ||||
| ×1 | 1N4001 | 1N4001 | supply; read from the schematic by eye | |
| ×1 | 1N4146 | 1N4146 | in the DC adaptor (-) lead; read from the schematic by eye | |
| ×3 | 1N916 | 1N916 | clipping; read from the schematic by eye | |
| ×2 | 1N4148 | 1N4148 | JFET gates; read from the schematic by eye | |
| ×1 | 1N751 | 1N751 / 5V1 | 5.1V zener, LED supply; read from the schematic by eye | |
| Transistors 3 | ||||
| ×2 | 2SC732 | 2SC732 | input and output buffers; read from the schematic by eye | |
| ×2 | 2SK30A | 2SK30A | JFET bypass switches; read from the schematic by eye | |
| ×2 | 2SC1685 | 2SC1685 | flip-flop; read from the schematic by eye | |
| ICs 1 | ||||
| ×1 | 4558 | 4558 | dual op amp, both sections drawn; read from the schematic by eye | |
| Potentiometers 3 | ||||
| Drive | 1MEG | 1M | Potentiometer | read from the schematic by eye |
| Tone | 22K | 22k | Potentiometer | read from the schematic by eye |
| Level | 10K | 10k | Potentiometer | read from the schematic by eye |
| LEDs 1 | ||||
| ×1 | LED | LED | no part number given; read from the schematic by eye | |
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