Enclosure not stated · 2 knobs
Gary Hurst Tone Bender MKI
Based on the Gary Hurst Tonebender MKI· 2 other boards clone it
- Category
- Fuzz
- Price
- see vendor
- Also as
- Vero layout · from Revolution Deux
- Tags
- freestompboxes.org trace
From the vendor
Gary Hurst's own build of the Tone Bender MKI, the same three-transistor germanium circuit as the Sola Sound unit with a few extra parts: a 2.2K/33K divider around the Attack pot, an electrolytic coupling cap between Q2 and Q3, and a 56K load after the output cap. The post says RnFR's vero can build either version by leaving out the Hurst parts.
Schematic
The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.
Parts list 20 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 11 | ||||
| R1 | 1M | 1M | read from the schematic by eye | |
| R2 | 8.2K | 8.2k | Q1 emitter; read from the schematic by eye | |
| R3 | 470K | 470k | Q2 base bias; read from the schematic by eye | |
| R4 | 2.2K | 2.2k | read from the schematic by eye | |
| R5 | 33K | 33k | read from the schematic by eye | |
| R6 | 2.2K | 2.2k | Q2 collector; read from the schematic by eye | |
| R7 | 8.2K | 8.2k | read from the schematic by eye | |
| R8 | 15K | 15k | Q3 collector; read from the schematic by eye | |
| R9 | 56K | 56k | read from the schematic by eye | |
| R10 | 2.2M | 2.2M | read from the schematic by eye | |
| R11 | 47K | 47k | read from the schematic by eye | |
| Capacitors 4 | ||||
| C1 | 10n | 10n | input; read from the schematic by eye | |
| C2 | 25u | 25u | electrolytic; read from the schematic by eye | |
| C3 | 25u | 25u | electrolytic; read from the schematic by eye | |
| C4 | 100n | 100n | output; read from the schematic by eye | |
| Transistors 3 | ||||
| Q1 | OC75 | OC75 | germanium PNP, Mullard; read from the schematic by eye | |
| Q2 | 2G381 | 2G381 | germanium PNP, Texas Instruments, hFE 120; read from the schematic by eye | |
| Q3 | 2G381 | 2G381 | germanium PNP, Texas Instruments, hFE 92; read from the schematic by eye | |
| Potentiometers 2 | ||||
| Attack | 50K | 50k | Potentiometer | read from the schematic by eye |
| Volume | 500K | 500k | Potentiometer | read from the schematic by eye |
Other boards based on the Gary Hurst Tonebender MKI
- Gary Hurst Tonebender MKI Tagboard Effects
- Tonebender MKI Tagboard Effects