125B · 2 knobs
1991 Drive
Based on the 1981 DRV
- Category
- Distortion· Vintage
- Controls
- Cut · Drive
- Difficulty
- Average
- Price
- €9.90out of stock
Heads up Builders widely report inconsistent quality from PCB Guitar Mania boards, and whether a given board works is a gamble. Read recent forum reports before ordering.
From the vendor
Project overview
This is an exceptional, vintage, versatile, highly interactive, nuanced preamp/distortion circuit. A little gem inspired by the well-thought-out 1981 DRV, resulting in something genuinely worthwhile of attention.
Introduction
1991 Drive delivers refined open and responsive distortion and overdrive tones, all immersed in its distinct vintage aura.
Created by the pure necessity of a vintage distortion pedal able to achieve unique soundings, this circuit was crafted with a lot of consciousness, caring, and passion; and all that shows in the final result. With only three highly interactive knobs, you can find a wide variety of sounds. It has a broad range of great drive waves, from clean tone shaping or shiny drive to entirely saturated distortion tones. It can also be a fantastic dirty boost, shaping your amp to get a perfect distortion with an airy and open breakup that also tightens into more precise playing.
This board includes an internal charge pump powered by IC3 LT1054*. You can use 7660s or Max1044, among others, but you must connect the two pads under IC3 with a little solder bridge.
Controls
• Cut
• Drive
• Volume
For further analysis on this circuit take a look at this thread on Free Stomp Boxes Forum.
For any technical questions regarding this build don’t forget to check out our Facebook Group and our forum at Free Stomp Boxes.
1991 Drive – Building Docs
1991 Drive – Drilling template
Schematic
The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 48 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 20 | ||||
| R1 | 2m2 | 0.0022 | ||
| R2 | 100k | 100k | ||
| R3 | 1k | 1k | ||
| R4 | 2m2 | 0.0022 | ||
| R5 | 470r | 470 | ||
| R6 | 10k | 10k | ||
| R7 | 2k2 | 2.2k | ||
| R8 | 1k | 1k | ||
| R9 | 2m2 | 0.0022 | ||
| R10 | 1k | 1k | ||
| R11 | 470r | 470 | ||
| R12 | 1k | 1k | ||
| R13 | 1k5 | 1.5k | ||
| R14 | 10k | 10k | ||
| R15 | 2m2 | 0.0022 | ||
| R16 | 2m2 | 0.0022 | ||
| R17 | 470r | 470 | ||
| R18 | 4k7 | 4.7k | ||
| R19 | 10k | 10k | ||
| R20 | 10k | 10k | ||
| Capacitors 18 | ||||
| C2 | 4u7 | 4.7u | ||
| C4 | 47u | 47u | ||
| C8 | 4u7 | 4.7u | ||
| C12 | 4u7 | 4.7u | ||
| C13 | 100u | 100u | ||
| C14 | 10u | 10u | ||
| C15 | 10u | 10u | ||
| C18 | 47u | 47u | ||
| C1 | 22n | 22n | ||
| C3 | 390p | 390p | ||
| C5 | 100n | 100n | ||
| C6 | 3n3 | 3.3n | ||
| C7 | 220n | 220n | ||
| C9 | 3n3 | 3.3n | ||
| C10 | 22n | 22n | ||
| C11 | 3n3 | 3.3n | ||
| C16 | 100n | 100n | ||
| C17 | 100n | 100n | ||
| Diodes 5 | ||||
| D0 | 1n5817 | 1N5817 | ||
| D1 | 1n914 | 1N914 | ||
| D3 | 1n914 | 1N914 | ||
| D5 | 1n5817 | 1N5817 | ||
| D7 | 1n5817 | 1N5817 | ||
| ICs 3 | ||||
| IC1 | TL072 | TL072 | ||
| IC2 | TL072 | TL072 | ||
| IC3 | LT1054* | LT1054 | ||
| Potentiometers 2 | ||||
| CUT | 100KA | A100k | Potentiometer | |
| DRIVE | 100KA | A100k | Potentiometer | |