1590B · 2 knobs
Zonky
Based on the John Hornby Skewes Zonk Machine MKI
- Category
- Fuzz
- Controls
- Fuzz · Swell
- Price
- £4.50in stock
From the vendor
This board replicates the much sought after John Hornby Skewes Zonk Machine MKI pedal produced in Leeds England in 1965 – 1966. A three transistor circuit that needs careful biasing – socket your resistors on this one! It has 2 knobs, Fuzz and Swell – it’s a classic fuzz for a fraction of the price of hunting down and finding an original. Whilst you can put it in any box from a 1590B upwards, we suggest a big enclosure like the original’s came it – it will add more mojo fuzz or something 🙂
Schematic
The schematic is in the vendor's build document, page 1. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 25 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| R1 | 1M | 1M | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R2 | 1M | 1M | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R6 | 3k3 | 3.3k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R7 | 3k3 | 3.3k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R3 | 4k7 | 4.7k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R4 | 470k | 470k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R5 | 2k2 | 2.2k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R8 | 15k | 15k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R9 | 10k | 10k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R10 | 56k | 56k | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| R11 | 2M2 | 2.2M | R Axial DIN0207 L6.3mm D2.5mm P7.62mm Horizontal | |
| Capacitors 6 | ||||
| C2 | 22u | 22u | CP Radial D5.0mm P2.00mm | |
| C4 | 22u | 22u | CP Radial D5.0mm P2.00mm | |
| C1 | 10u | 10u | CP Radial D5.0mm P2.00mm | |
| C3 | 1n | 1n | C Rect L7.0mm W2.0mm P5.00mm | |
| C5 | 100n | 100n | C Rect L7.0mm W2.0mm P5.00mm | |
| C6 | 47n | 47n | C Rect L7.0mm W2.0mm P5.00mm | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | D DO-41 SOD81 P7.62mm Horizontal | |
| Transistors 3 | ||||
| Q1 | A02650 | A02650 | Trans-Can-WIDE | |
| Q2 | OC75 | OC75 | Trans-Can-WIDE | |
| Q3 | OC44 | OC44 | Trans-Can-WIDE | |
| ICs 1 | ||||
| U1 | TC1044SCPA | TC1044SCPA | DIP-8 W7.62mm Socket | |
| Potentiometers 2 | ||||
| FUZZ | A50K | A50k | Potentiometer Alpha just holes | |
| SWELL | A500K | A500k | Potentiometer Alpha just holes | |
| Other 1 | ||||
| G*** | LOGO | LOGO | fcp-logo-head-29mm | |