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FUZZTONEVOLUMEMODE

125B · 4 knobs

Aion FX

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

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RefValueNormalizedTypeNotes
Resistors 20
R11k1kMetal film resistor, 1/4W
R2330k330kMetal film resistor, 1/4W
R3100k100kMetal film resistor, 1/4W
R4470R470Metal film resistor, 1/4W
R5470k470kMetal film resistor, 1/4W
R610k10kMetal film resistor, 1/4W
R7100k100kMetal film resistor, 1/4W
R81k1kMetal film resistor, 1/4W
R947k47kMetal film resistor, 1/4W
R1047k47kMetal film resistor, 1/4W
R1147k47kMetal film resistor, 1/4W
R12330k330kMetal film resistor, 1/4W
R15470R470Metal film resistor, 1/4W
R1622k22kMetal film resistor, 1/4W
R1722k22kMetal film resistor, 1/4W
R18100R100Metal film resistor, 1/4WPower supply filter resistor.
R1947k47kMetal film resistor, 1/4WAdded in v1.2. See build notes.
R2047k47kMetal film resistor, 1/4WAdded in v1.2. See build notes.
LEDR10k10kMetal film resistor, 1/4WLED current-limiting resistor. Adjust value to change LED brightness.
RPD2M22.2MMetal film resistor, 1/4WInput pulldown resistor.
Capacitors 15
C147n47nFilm capacitor, 7.2 x 2.5mm
C21n51.5nFilm capacitor, 7.2 x 2.5mm
C347n47nFilm capacitor, 7.2 x 2.5mm
C447pF47pMLCC capacitor, NP0/C0G
C547n47nFilm capacitor, 7.2 x 2.5mm
C64.7uF4.7uElectrolytic capacitor, 4mm
C747n47nFilm capacitor, 7.2 x 2.5mm
C82n22.2nFilm capacitor, 7.2 x 2.5mm
C96n86.8nFilm capacitor, 7.2 x 2.5mm
C1010n10nFilm capacitor, 7.2 x 2.5mm
C1147n47nFilm capacitor, 7.2 x 2.5mm
C154.7uF4.7uElectrolytic capacitor, 5mm
C1647uF47uElectrolytic capacitor, 5mmReference voltage filter capacitor.
C17100uF100uElectrolytic capacitor, 6.3mmPower supply filter capacitor.
C18100n100nMLCC capacitor, X7RPower supply filter capacitor.
Diodes 2
D11N58171N5817Schottky diode, DO-41
D21N9141N914Fast-switching diode, DO-35
Transistors 3
Q1BC549CBC549CBJT transistor, NPN, TO-92
Q2BC549CBC549CBJT transistor, NPN, TO-92
Q3BC549CBC549CBJT transistor, NPN, TO-92
ICs 1
IC1TL072TL072Operational amplifier, DIP8
Potentiometers 3
FUZZ1kBB1k16mm right-angle PCB mount pot
TONE100kBB100k16mm right-angle PCB mount pot
VOL.10kAA10k16mm right-angle PCB mount pot
Trimmers 1
TRIM1k1kTrimmer, 10%, 1/4"Bourns 3362P or similar.
Switches 2
MODE3P4T rotary3P4T ROTARYRotary switch, 3 pole / 4 positionMust be Alpha SR2612F. See parts spreadsheet (2nd tab) for sources.
FSW3PDT3PDTStomp switch, 3PDT
LEDs 1
LED5mm5MMLED, 5mm, red diffused
Jacks & sockets 4
IC1-SDIP-8 socketDIP-8 SOCKETIC socket, DIP-8
IN1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
OUT1/4" mono1/4" MONO1/4" phone jack, closed frameSwitchcraft 111X or equivalent.
DC2.1mm2.1MMDC jack, 2.1mm panel mountMouser 163-4302-E or equivalent.
Hardware 1
ENC125B125BEnclosure, die-cast aluminumCan also use a Hammond 1590N1.

Other boards based on the Lovetone Big Cheese