Enclosure not stated
Boss MD-2
Based on the Boss MD-2
- 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 47 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- power-section diode at x550: drawn between the rails beside a broken wire, counted as one diode
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 17 | ||||
| ×11 | 10k | 10k | read from the schematic by eye | |
| ×11 | 56k | 56k | four in the flip-flop bypass switch; read from the schematic by eye | |
| ×9 | 1M | 1M | read from the schematic by eye | |
| ×6 | 100k | 100k | read from the schematic by eye | |
| ×5 | 22k | 22k | two in the VCC/2 divider; read from the schematic by eye | |
| ×4 | 2k2 | 2.2k | read from the schematic by eye | |
| ×4 | 1k | 1k | read from the schematic by eye | |
| ×3 | 4k7 | 4.7k | read from the schematic by eye | |
| ×3 | 330k | 330k | read from the schematic by eye | |
| ×3 | 100R | 100 | read from the schematic by eye | |
| ×2 | 5k6 | 5.6k | read from the schematic by eye | |
| ×2 | 3k9 | 3.9k | read from the schematic by eye | |
| ×1 | 15k | 15k | Gain Boost network; read from the schematic by eye | |
| ×1 | 33k | 33k | read from the schematic by eye | |
| ×1 | 47k | 47k | tone network; read from the schematic by eye | |
| ×1 | 3k3 | 3.3k | tone network; read from the schematic by eye | |
| ×1 | 1k2 | 1.2k | LED; read from the schematic by eye | |
| Capacitors 16 | ||||
| ×7 | 1uF | 1u | electrolytic; read from the schematic by eye | |
| ×6 | 47uF | 47u | electrolytic; read from the schematic by eye | |
| ×4 | 47n | 47n | read from the schematic by eye | |
| ×4 | 10uF | 10u | electrolytic; read from the schematic by eye | |
| ×3 | 470p | 470p | one in the Distortion loop, two in the flip-flop; read from the schematic by eye | |
| ×3 | 10n | 10n | flip-flop; read from the schematic by eye | |
| ×1 | 39n | 39n | read from the schematic by eye | |
| ×1 | 1n5 | 1.5n | read from the schematic by eye | |
| ×1 | 33uF | 33u | tantalum; read from the schematic by eye | |
| ×1 | 22uF | 22u | tantalum, Gain Boost; read from the schematic by eye | |
| ×1 | 220p | 220p | read from the schematic by eye | |
| ×1 | 27n | 27n | read from the schematic by eye | |
| ×1 | 100n | 100n | tone network; read from the schematic by eye | |
| ×1 | 56n | 56n | tone network; read from the schematic by eye | |
| ×1 | 2n2 | 2.2n | tone network; read from the schematic by eye | |
| ×1 | 100uF | 100u | electrolytic, supply; read from the schematic by eye | |
| Diodes 3 | ||||
| ×6 | Diode | DIODE | no part number given; three at the 2SK118 switches, three in the supply; read from the schematic by eye | |
| ×1 | 6V2 | 6V2 | zener, supply regulator; read from the schematic by eye | |
| ×1 | 5V6 | 5V6 | zener, LED driver; read from the schematic by eye | |
| Transistors 4 | ||||
| ×3 | 2SK184 | 2SK184 | JFET; read from the schematic by eye | |
| ×3 | 2SK118 | 2SK118 | JFET switches; read from the schematic by eye | |
| ×2 | 2SA1048 | 2SA1048 | PNP; read from the schematic by eye | |
| ×8 | 2SC2458 | 2SC2458 | NPN; two in the supply, two in the flip-flop; read from the schematic by eye | |
| ICs 1 | ||||
| ×2 | TL072P | TL072P | dual op amp; four halves drawn; read from the schematic by eye | |
| Potentiometers 5 | ||||
| Distortion | 100k | 100k | Potentiometer | wired as variable resistor; read from the schematic by eye |
| Gain Boost | 100k | 100k | Potentiometer | read from the schematic by eye |
| Botton | 100k | 100k | Potentiometer | label as drawn, probably Bottom; read from the schematic by eye |
| Tone | 100k | 100k | Potentiometer | read from the schematic by eye |
| ×1 | 50k | 50k | Potentiometer | unlabeled, at the output: level; read from the schematic by eye |
| LEDs 1 | ||||
| ×1 | LED | LED | read from the schematic by eye | |