Enclosure not stated
Sheepylove· PCB007
OD81 - A super one
Based on the Boss SD-1· 2 other boards clone it
- Category
- Overdrive· OD
- Price
- €10.00in stock
From the vendor
The Boss SD-1 Super Overdrive is a cornerstone of guitar history. Since its release in 1981, its design has remained virtually unchanged, a rarity in the rapidly evolving world of guitar gear.
The SD-1 was born as an evolution of the revolutionary Boss OD- 1 Overdrive, which in 1977 pioneered the “overdrive” category by using a patented asymmetrical clipping circuit to mimic the natural saturation of a tube amplifier.
While the OD-1 was groundbreaking, it lacked a tone control. After the Ibanez Tube Screamer gained market dominance by offering a tone knob (using symmetrical clipping to avoid Boss’s patent), Boss responded in 1981 by releasing the SD-1 as a direct competitor.
Schematic
The schematic is in the vendor's build document, page 4. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 41 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 19 | ||||
| R2 | 22 | 22 | ||
| R3 | 33k | 33k | ||
| R4 | 33k | 33k | ||
| R20 | 33k | 33k | ||
| R5 | 2M2 | 2.2M | ||
| R6 | 10k | 10k | ||
| R7 | 10k | 10k | ||
| R8 | 10k | 10k | ||
| R14 | 10k | 10k | ||
| R22 | 10k | 10k | ||
| R9 | 470 | 470 | ||
| R10 | 4k7 | 4.7k | ||
| R13 | 4k7 | 4.7k | ||
| R11 | 22k | 22k | ||
| R12 | 1M | 1M | ||
| R15 | 1k | 1k | ||
| R18 | 470k | 470k | ||
| R19 | 100k | 100k | ||
| R21 | 100k | 100k | ||
| Capacitors 11 | ||||
| C1 | 100u | 100u | ||
| C2 | 47u | 47u | ||
| C3 | 47n | 47n | ||
| C6 | 47n | 47n | ||
| C14 | 47n | 47n | ||
| C4 | 10n | 10n | ||
| C5 | 27n | 27n | ||
| C7 | 1u | 1u | ||
| C13 | 1u | 1u | ||
| C10 | 18n | 18n | ||
| C12 | 18n | 18n | ||
| Diodes 4 | ||||
| D1 | 1N5817 | 1N5817 | ||
| D6 | 1S2473 | 1S2473 | Si diode, 1N4148/1N914 is a substitute | |
| D7 | 1S2473 | 1S2473 | Si diode, 1N4148/1N914 is a substitute | |
| D8 | 1S2473 | 1S2473 | Si diode, 1N4148/1N914 is a substitute | |
| Transistors 2 | ||||
| Q1 | 2SC1815 | 2SC1815 | Easy to find in SMD. | |
| Q2 | 2SC1815 | 2SC1815 | Easy to find in SMD. | |
| ICs 1 | ||||
| IC1 | RC4558 | RC4558 | Most dual op-amps will work. | |
| Potentiometers 3 | ||||
| POT1 | B10k | B10k | ||
| POT2 | B1M | B1M | ||
| POT3 | B20k | B20k | ||
| LEDs 1 | ||||
| D2 | LED | LED | ||