Enclosure not stated
BOSS HM-2
Based on the Boss HM-2· 6 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 39 rows
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Check before you build · 1 value the reader of this schematic was not sure of
- D: three IC1B feedback diodes take the single 1N4148 label drawn between them
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×9 | 10k | 10k | read from the schematic by eye | |
| ×4 | 100k | 100k | two in transistor stages, two in EQ filter; read from the schematic by eye | |
| ×2 | 470k | 470k | read from the schematic by eye | |
| ×2 | 68k | 68k | read from the schematic by eye | |
| ×2 | 22k | 22k | read from the schematic by eye | |
| ×2 | 3.3k | 3.3k | read from the schematic by eye | |
| ×3 | 330 | 330 | EQ filter outputs; read from the schematic by eye | |
| ×1 | 1M | 1M | read from the schematic by eye | |
| ×1 | 1k | 1k | read from the schematic by eye | |
| ×1 | 220k | 220k | IC1B feedback; read from the schematic by eye | |
| ×1 | 82k | 82k | read from the schematic by eye | |
| ×1 | 47k | 47k | read from the schematic by eye | |
| ×1 | 150 | 150 | read from the schematic by eye | |
| ×1 | 120 | 120 | Q7 emitter; read from the schematic by eye | |
| ×1 | 22 | 22 | Q6 emitter; read from the schematic by eye | |
| Capacitors 12 | ||||
| ×4 | 47nF | 47n | read from the schematic by eye | |
| ×3 | 10pF | 10p | read from the schematic by eye | |
| ×2 | 47uF | 47u | electrolytic, supply; read from the schematic by eye | |
| ×2 | 10uF | 10u | electrolytic; read from the schematic by eye | |
| ×2 | 1uF | 1u | electrolytic; read from the schematic by eye | |
| ×1 | 1nF | 1n | read from the schematic by eye | |
| ×1 | 68nF | 68n | read from the schematic by eye | |
| ×1 | 6.8nF | 6.8n | read from the schematic by eye | |
| ×1 | 4.7nF | 4.7n | read from the schematic by eye | |
| ×1 | 1.5uF | 1.5u | electrolytic; read from the schematic by eye | |
| ×1 | 0.15uF | 150n | polarized; read from the schematic by eye | |
| ×1 | 0.1uF | 100n | polarized; read from the schematic by eye | |
| Diodes 2 | ||||
| ×5 | 1N4148 | 1N4148 | three in IC1B feedback, two clipping to ground; read from the schematic by eye | |
| ×2 | Ge | GE | germanium diodes labeled GE.DIOD, no part number given; read from the schematic by eye | |
| Transistors 3 | ||||
| Q1 | 2SK30 | 2SK30 | JFET; BF245 also given; read from the schematic by eye | |
| Q6 | 2SC2240 | 2SC2240 | read from the schematic by eye | |
| Q7 | 2SA970 | 2SA970 | read from the schematic by eye | |
| ICs 3 | ||||
| IC1 | M5216L | M5216L | dual op amp, IC1A/IC1B; read from the schematic by eye | |
| IC2 | M5616L | M5616L | IC2A/IC2B; possibly M5216L; read from the schematic by eye | |
| IC3 | M5616L | M5616L | IC3A/IC3B; possibly M5216L; read from the schematic by eye | |
| Potentiometers 4 | ||||
| Dist | A250K | A250k | Potentiometer | 250k LOG; read from the schematic by eye |
| High | B10K | B10k | Potentiometer | LIN; read from the schematic by eye |
| Low | B10K | B10k | Potentiometer | LIN; read from the schematic by eye |
| ×1 | A10K | A10k | Potentiometer | output level, 10k LOG; read from the schematic by eye |
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