1590B · 1 knobs
From the vendor
Hybrid Si/Ge fuzz to rip the soul out of your tone. Luckily it adds a whole lot of evil to fill the void.
Based on a 3-knob Tone Bender, the first two germanium transistors have been replaced with a single high-gain silicon can. This feeds into a final-stage germanium to give you that growly warmth missing from a full silicon circuit. The result is a lot more agressive than you'd expect from a 3KTB, but still has the range and response of that old favourite. Cleans up nicely with the guitar volume control. Perfect stoner territory.
Designed for board-mounted pots (round shaft - you'll need set-screw fitting knobs), but you can wire in 'normal' splined shaft if you prefer. It's the kind of pedal some people might like in a massive box.
NOTE: does require a small hack for now. See that ceramic cap next to the ribbon cable? That needs to straddle the IN and GND pads. Will be fixed when these boards a gone, but it's such a tiddler that it didn't seem right to bin this lot.
Partial kit: PCB, all board-mounted components, pots.
Full kit: As above, plus footswitch and appropriate daughterboard/components for your selected bypass type (see Downloads section for details of those), jack sockets, DC socket, battery snap, hook-up wire, LED.
Enclosure (pre-drilled) is only available with full kits, and will take a battery. Knobs are not included.
Builds are only available with full kits including enclosures. Please choose appropriate knobs.
Difficulty: Medium
PCB size: 50 x 30mm
Knobs required: 3
Enclosure: 1590B
Direct Connect compatible (4 way)
Download the INSTRUCTION PDF
Schematic
The schematic is in the vendor's build document, page 2. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 28 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| R1 | 1M | 1M | ||
| R2 | 47K | 47k | ||
| R3 | 470K | 470k | ||
| R4 | 10K | 10k | ||
| R5 | 330R | 330 | ||
| R6 | 10K | 10k | ||
| R7 | 1K | 1k | ||
| R8 | 10K | 10k | ||
| R9 | 33K | 33k | ||
| R10 | 1K | 1k | ||
| R11 | 10K | 10k | ||
| R12 | 2K2 | 2.2k | (CLR) | |
| Capacitors 11 | ||||
| C1 | 1u | 1u | Electrolytic capacitor | |
| C2 | 47p | 47p | ||
| C3 | 100u | 100u | Electrolytic capacitor | |
| C4 | 1u | 1u | Electrolytic capacitor | |
| C5 | 10u | 10u | Electrolytic capacitor | |
| C6 | 470p | 470p | ||
| C7 | 10n | 10n | ||
| C8 | 1u | 1u | Electrolytic capacitor | |
| C9 | 22u | 22u | Electrolytic capacitor | |
| C10 | 1u | 1u | Electrolytic capacitor | |
| C11 | 100p | 100p | ||
| Diodes 2 | ||||
| D1 | 1N4148 | 1N4148 | ||
| D2 | 1N4001 | 1N4001 | ||
| Transistors 2 | ||||
| Q1 | MPSA18 | MPSA18 | ||
| Q2 | NPN Ge** | NPN GE | ||
| Potentiometers 1 | ||||
| VOL | 100KA | A100k | ||