125B · 4 knobs
FusionDynamic Distortion
Based on the Suhr Riot· 2 other boards clone it
- Category
- Distortion
- Controls
- Drive · Tone · Volume · Presence
- Difficulty
- Easy
- Price
- $12.50in stock
From the vendor
A versatile distortion/overdrive noted for its Marshall-like “stack of amps” tone.
The Fusion Dynamic Distortion is an adaptation of the Suhr Riot Distortion, originally released in 2009. The Riot is in the family of Marshall-like pedals and is lauded for its high gain “stack of amps” tone.
The Riot was developed as a modified clone of the MI Audio Crunch Box from 2006, which in turn was a derivative of the Marshall Bluesbreaker along with some inspiration from the Fulltone OCD.
The updated version of the Fusion is very similar to the legacy PCB, but with the addition of an internal slide switch so that 9V and 18V modes can both be used instead of being hardwired for one or the other.
As in the legacy project, we’ve also brought over the internal Presence trimmer from the Crunch Box. The Riot never had one, though it had two fixed resistors that simulated a 20k trimmer set at around 1:00 (58% rotation). You can always set it to be exactly like the original, but by having the trimmer available, you have access to an expanded range of tones not found in the original Riot.
Note: This project uses a type of capacitor that has been temporarily discontinued by WIMA. Please see our news article about the issue and the substitution spreadsheet for project-specific recommendations. We are stocking a limited supply in the mean time. The build document has not yet been updated to reflect this.
Schematic
The schematic is in the vendor's build document, page 6. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 62 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| R1 | 1M | 1M | Metal film resistor, 1/4W | |
| R2 | 1k | 1k | Metal film resistor, 1/4W | |
| R3 | 1k | 1k | Metal film resistor, 1/4W | |
| R4 | 10k | 10k | Metal film resistor, 1/4W | |
| R5 | 1M | 1M | Metal film resistor, 1/4W | |
| R6 | 470R | 470 | Metal film resistor, 1/4W | |
| R7 | 470R | 470 | Metal film resistor, 1/4W | |
| R8 | 220R | 220 | Metal film resistor, 1/4W | |
| R9 | 100k | 100k | Metal film resistor, 1/4W | |
| R10 | 100R | 100 | Metal film resistor, 1/4W | |
| R11 | 22k | 22k | Metal film resistor, 1/4W | |
| R12 | 22k | 22k | Metal film resistor, 1/4W | |
| RPD | 2M2 | 2.2M | Metal film resistor, 1/4W | Input pull-down resistor. |
| LEDR | 10k | 10k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 18 | ||||
| C1 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 33pF | 33p | MLCC capacitor, NP0/C0G | |
| C3 | 100pF | 100p | MLCC capacitor, NP0/C0G | |
| C4 | 220n | 220n | Film capacitor, 7.2 x 2.5mm | |
| C5 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 100pF | 100p | MLCC capacitor, NP0/C0G | |
| C7 | 2.2uF | 2.2u | Film capacitor, 7.2 x 5mm | |
| C8 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 22n | 22n | Film capacitor, 7.2 x 2.5mm | |
| C10 | 1uF | 1u | Film capacitor, 7.2 x 3.5mm | |
| C11 | 2.2uF | 2.2u | Film capacitor, 7.2 x 5mm | |
| C12 | 470n | 470n | MLCC capacitor, X7R | Power supply filter capacitor. |
| C13 | 10uF | 10u | Electrolytic capacitor, 5mm | Power supply filter capacitor. |
| C14 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter capacitor. |
| C15 | 10uF | 10u | Electrolytic capacitor, 5mm | Power supply filter capacitor. |
| C16 | 470n | 470n | MLCC capacitor, X7R | Power supply filter capacitor. |
| C17 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Reference voltage filter capacitor. |
| C18 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. Mistakenly labeled C19 on initial release. |
| Diodes 12 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | Ge | GE | Germanium diode, DO-7 | |
| D3 | Ge | GE | Germanium diode, DO-7 | Any germanium diode should work the same in this circuit, so use |
| D4 | Ge | GE | Germanium diode, DO-7 | whatever you can find. See build notes for precautions about polarity. |
| D5 | Ge | GE | Germanium diode, DO-7 | |
| D6 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D7 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| D8 | 3mm blue | 3MM BLUE | LED, 3mm, blue water-clear | |
| D9 | 3mm red | 3MM RED | LED, 3mm, red diffused | |
| D10 | 3mm red | 3MM RED | LED, 3mm, red diffused | |
| D11 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D12 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| ICs 3 | ||||
| IC1 | JRC4580D | JRC4580D | Operational amplifier, DIP8 | |
| IC2 | JRC4580D | JRC4580D | Operational amplifier, DIP8 | |
| IC3 | TC1044SCPA | TC1044SCPA | Operational amplifier, DIP8 | Can also use LT1054. |
| Potentiometers 3 | ||||
| DRIVE | 100kB | B100k | 16mm right-angle PCB mount pot | |
| TONE | 10kC | C10k | 16mm right-angle PCB mount pot | |
| VOL. | 10kA | A10k | 16mm right-angle PCB mount pot | |
| Switches 3 | ||||
| CLIP | DPDT on-on-on | DPDT ON-ON-ON | Toggle switch, DPDT on-on-on | See build notes for correct switch configuration. |
| VOLT. | DPDT slide | DPDT SLIDE | DPDT slide, micro | E-Switch EG1271 |
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 6 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IC2-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IC3-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| 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. | 9V | 9V | 9V battery snap | Soft vinyl 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 Suhr Riot
- Fusion (Legacy) Aion FX · 1590B
- Crysis PCB Guitar Mania · 1590BB · €9.90