125B · 4 knobs
WyvernSilicon Drive
Based on the Dinosaural Tube Bender· 2 other boards clone it
- Category
- Fuzz· Overdrive / Fuzz
- Controls
- Drive · Tone · Level · Tone Shift
- Difficulty
- Easy
- Price
- $12.50in stock
From the vendor
A reproduction of a rare silicon-transistor drive pedal designed by Dan Coggins, formerly of Lovetone, handbuilt in small quantities from 2003–2007.
The Wyvern Silicon Drive is an adaptation of the Tube Bender, a silicon transistor overdrive designed by Dan Coggins of Dinosaural (and formerly of Lovetone). It was originally designed as a DIY project and kit by Guitar Magazine (UK) in February 2003.
In October of the same year, Dan tweaked the voicing of the circuit and added the “Tone Shift” switch and began building it commercially under the Dinosaural name. Around 140 of them were made before production ceased in 2007. In 2016, Dan built another 12 units using the original circuit board, parts and internal wiring, with the only difference being the black enclosure compared to the original white.
Despite the low number of units in existence, the Tube Bender found its way into the hands of several musicians and producers in the UK, including Snow Patrol who have several of them. (According to their manager, their “Eyes Open” album from 2006 had Tube Benders all over it.)
As the name implies, it was designed to land somewhere in between the Tube Screamer and Tone Bender in sound, although the circuit shares nothing in common with either of them from an engineering perspective. And while the schematic does resemble other silicon fuzz circuits such as the Hot Silicon, it’s definitely not voiced like a fuzz.
The Wyvern is based on the commercial version of the Tube Bender which was traced by Aion FX in 2020. The earlier magazine version can also be built with a few parts substitutions that are provided. The only modification in the Wyvern is the use of a 3-position switch for the Tone Shift so you can have a third setting in between the other two.
Schematic
The schematic is in the vendor's build document, page 7. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 42 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 17 | ||||
| R1 | 1k5 | 1.5k | Metal film resistor, 1/4W | 1k2 in magazine project. |
| R2 | 1M | 1M | Metal film resistor, 1/4W | |
| R3 | 120k | 120k | Metal film resistor, 1/4W | 100k in magazine project. |
| R4 | 1k2 | 1.2k | Metal film resistor, 1/4W | |
| R5 | 2k2 | 2.2k | Metal film resistor, 1/4W | |
| R6 | 150R | 150 | Metal film resistor, 1/4W | |
| R7 | 1k2 | 1.2k | Metal film resistor, 1/4W | |
| R8 | 10k | 10k | Metal film resistor, 1/4W | 22k in magazine project. |
| R9 | 1k2 | 1.2k | Metal film resistor, 1/4W | 2k2 in magazine project. |
| R10 | 10k | 10k | Metal film resistor, 1/4W | 22k in magazine project. |
| R11 | 10k | 10k | Metal film resistor, 1/4W | 22k in magazine project. |
| R12 | 22k | 22k | Metal film resistor, 1/4W | 68k in magazine project. |
| R13 | 22k | 22k | Metal film resistor, 1/4W | |
| R14 | 22k | 22k | Metal film resistor, 1/4W | |
| R15 | 100R | 100 | Metal film resistor, 1/4W | Power supply resistor. |
| RPD | 2M2 | 2.2M | Metal film resistor, 1/4W | Input pulldown resistor. Can be as low as 1M. |
| LEDR | 4k7 | 4.7k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 10 | ||||
| C1 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | 100n in magazine project. |
| C3 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | 100n in magazine project. |
| C4 | 3n3 | 3.3n | Film capacitor, 7.2 x 2.5mm | 4n7 in magazine project. |
| C5 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 33n | 33n | Film capacitor, 7.2 x 2.5mm | |
| C7 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | Modification that adds a 3rd Tone Shift position from the original. Can experiment with 15n or 22n here as well. |
| C8 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter capacitor. |
| C9 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C10 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| Transistors 4 | ||||
| Q1 | 2N5088 | 2N5088 | BJT transistor, NPN, TO-92 | Original uses BC549C. 2N5088 is the USA standard equivalent. |
| Q2 | 2N3906 | 2N3906 | BJT transistor, PNP, TO-92 | Original uses BC307B (obsolete). 2N3906 is equivalent. |
| Q3 | 2N5088 | 2N5088 | BJT transistor, NPN, TO-92 | Original uses BC549C. 2N5088 is the USA standard equivalent. |
| Q4 | 2N5088 | 2N5088 | BJT transistor, NPN, TO-92 | Original uses BC549C. 2N5088 is the USA standard equivalent. |
| Potentiometers 3 | ||||
| DRIVE | 100kA | A100k | 16mm right-angle PCB mount pot | 50kA in magazine project. |
| TONE | 100kB | B100k | 16mm right-angle PCB mount pot | 50kA in magazine project. |
| LEVEL | 100kB | B100k | 16mm right-angle PCB mount pot | 50kA in magazine project. |
| Switches 1 | ||||
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 3 | ||||
| IN | 1/4" stereo | 1/4" STEREO | 1/4" phone jack, closed frame | Switchcraft 112BX or equivalent. |
| OUT | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| DC | 2.1mm | 2.1MM | DC jack, 2.1mm panel mount | Mouser 163-4302-E or equivalent. |
| Hardware 2 | ||||
| BATT | Battery snap | BATTERY SNAP | 9V battery snap | Optional. Use the soft plastic type—the hard-shell type will not fit. |
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |
Other boards based on the Dinosaural Tube Bender
- Tube Bender Fuzz Dog · 1590B · £31.20
- Pipe Stretcher Overdrive PedalPCB · 125B · $10.00