125B · 4 knobs
MonolithSilicon Fuzz
Based on the Lovetone Big Cheese· 2 other boards clone it
- Category
- Fuzz· Distortion / fuzz
- Controls
- Fuzz · Tone · Volume · Mode
- Difficulty
- Intermediate
- Price
- $12.50in stock
From the vendor
A legendary silicon transistor fuzz that has been spotted in the rigs of many high-profile musicians such as The Edge, Jimmy Page, Colin Greenwood and Johnny Marr among many others.
The Monolith Silicon Fuzz is an adaptation of the Lovetone Big Cheese, a versatile fuzz pedal released in 1995. The Big Cheese is perhaps Lovetone’s most famous pedal, with a jaw-dropping artist repertoire that includes The Edge, Jimmy Page, Colin Greenwood, Ed O’Brien, Johnny Marr, J Mascis, Stephen Malkmus, Jeff Tweedy and Kevin Shields.
The Big Cheese is a hybrid of several different circuit topologies. An op-amp provides input buffering and output gain recovery, and a silicon transistor fuzz resembling a Fuzz Face or Tone Bender is sandwiched in the middle. This is followed by diode hard clipping and a Big Muff-style tone control.
In traditional Lovetone fashion, the Big Cheese also has a rotary control, allowing three different tone stack modes: tone bypass, scooped mids, and flat mids. There is also a fourth mode called “Cheese” that changes the bias on the transistor fuzz, delivering gated “amp death” tones similar to other circuits that use intentional misbiasing such as the Zvex Fuzz Factory or Cornish NG-3. The result is in a class of its own, an extremely versatile and unique drive machine that is deserving of the high praise it receives.
The Monolith is an exact adaptation of the Big Cheese except for the addition of an optional boost stage at the end to increase the maximum volume. The original can get well above unity gain at max volume, but by reconfiguring the output buffer as a gain boost, we can get a bit more out of it.
Special thanks to Ian (LaceSensor / Gigahearts FX), the DIY community’s resident Lovetone expert, for help verifying the Monolith prototype against an original Big Cheese for accuracy.
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 53 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 20 | ||||
| R1 | 1k | 1k | Metal film resistor, 1/4W | |
| R2 | 330k | 330k | Metal film resistor, 1/4W | |
| R3 | 100k | 100k | Metal film resistor, 1/4W | |
| R4 | 470R | 470 | Metal film resistor, 1/4W | |
| R5 | 470k | 470k | Metal film resistor, 1/4W | |
| R6 | 10k | 10k | Metal film resistor, 1/4W | |
| R7 | 100k | 100k | Metal film resistor, 1/4W | |
| R8 | 1k | 1k | Metal film resistor, 1/4W | |
| R9 | 47k | 47k | Metal film resistor, 1/4W | |
| R10 | 47k | 47k | Metal film resistor, 1/4W | |
| R11 | 47k | 47k | Metal film resistor, 1/4W | |
| R12 | 330k | 330k | Metal film resistor, 1/4W | |
| R15 | 470R | 470 | Metal film resistor, 1/4W | |
| R16 | 22k | 22k | Metal film resistor, 1/4W | |
| R17 | 22k | 22k | Metal film resistor, 1/4W | |
| R18 | 100R | 100 | Metal film resistor, 1/4W | Power supply filter resistor. |
| R19 | 47k | 47k | Metal film resistor, 1/4W | Added in v1.2. See build notes. |
| R20 | 47k | 47k | Metal film resistor, 1/4W | Added in v1.2. See build notes. |
| LEDR | 10k | 10k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| RPD | 2M2 | 2.2M | Metal film resistor, 1/4W | Input pulldown resistor. |
| Capacitors 15 | ||||
| C1 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 1n5 | 1.5n | Film capacitor, 7.2 x 2.5mm | |
| C3 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C4 | 47pF | 47p | MLCC capacitor, NP0/C0G | |
| C5 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C7 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C8 | 2n2 | 2.2n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 6n8 | 6.8n | Film capacitor, 7.2 x 2.5mm | |
| C10 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C15 | 4.7uF | 4.7u | Electrolytic capacitor, 5mm | |
| C16 | 47uF | 47u | Electrolytic capacitor, 5mm | Reference voltage filter capacitor. |
| C17 | 100uF | 100u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C18 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. |
| Diodes 2 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| Transistors 3 | ||||
| Q1 | BC549C | BC549C | BJT transistor, NPN, TO-92 | |
| Q2 | BC549C | BC549C | BJT transistor, NPN, TO-92 | |
| Q3 | BC549C | BC549C | BJT transistor, NPN, TO-92 | |
| ICs 1 | ||||
| IC1 | TL072 | TL072 | Operational amplifier, DIP8 | |
| Potentiometers 3 | ||||
| FUZZ | 1kB | B1k | 16mm right-angle PCB mount pot | |
| TONE | 100kB | B100k | 16mm right-angle PCB mount pot | |
| VOL. | 10kA | A10k | 16mm right-angle PCB mount pot | |
| Trimmers 1 | ||||
| TRIM | 1k | 1k | Trimmer, 10%, 1/4" | Bourns 3362P or similar. |
| Switches 2 | ||||
| MODE | 3P4T rotary | 3P4T ROTARY | Rotary switch, 3 pole / 4 position | Must be Alpha SR2612F. See parts spreadsheet (2nd tab) for sources. |
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 4 | ||||
| IC1-S | DIP-8 socket | DIP-8 SOCKET | IC socket, DIP-8 | |
| IN | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X 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 1 | ||||
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |
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