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VOLUMETONESUSTAIN

Enclosure not stated · 3 knobs

Effects Layouts (blog)

Electro Harmonix Ram's Head Big MuffVerified

Based on the Electro-Harmonix Big Muff Pi· 73 other boards clone it

Category
Distortion
Controls
Volume · Tone · Sustain
Build
Perfboard
Layout
Verified · Effects Layouts (blog) marks it as built and working
Tags
Distortion, Electro Harmonix, Fuzz, Guild
Open the layout at Effects Layouts (blog)

From the post

There are a lot of versions and subversions of the Big Muff. Many consider the Violet Ram's Head to be the best, though many consider the Triangle, or IC, or Green Russian, etc. the best. YMMV

This one has the pots hard mounted to the board, though depending on the enclosure you use, it may be best to wire them off-board. This layout is heavily inspired by the original Ram's Head circuit board, just resized for more typical sized components. I've also added a polarity protection diode, power filtering cap, and an LED resistor.

EHX also used this same circuit for the Guild Foxey Lady (3-knob) as well as several other OEM pedals EHX produced.

Schematic

This is a board layout, a drawing of where each part goes, and the post may link the schematic it was drawn from. Open the layout at Effects Layouts (blog). No KiCad fragment has been drawn for this circuit yet.

Parts list 28 rows

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RefValueNormalizedTypeNotes
Resistors 11
×4470K470kread from the layout by eye
×4100K100kread from the layout by eye
×412K12kread from the layout by eye
×3100Ω100read from the layout by eye
×28.2K8.2kread from the layout by eye
×233K33kread from the layout by eye
×122K22kread from the layout by eye
×12.7K2.7kread from the layout by eye
×11M1Mread from the layout by eye
×1560Ω560read from the layout by eye
×12.2K2.2kLED resistor; read from the layout by eye
Capacitors 5
×8100nF100nread from the layout by eye
×13.9nF3.9nread from the layout by eye
×110nF10nread from the layout by eye
×3470pF470pread from the layout by eye
×147uF47uelectrolytic; read from the layout by eye
Diodes 5
×11N40011N4001read from the layout by eye
D11N9141N914legend: 1N914 or 1N4148; read from the layout by eye
D21N9141N914legend: 1N914 or 1N4148; read from the layout by eye
D31N9141N914legend: 1N914 or 1N4148; read from the layout by eye
D41N9141N914legend: 1N914 or 1N4148; read from the layout by eye
Transistors 4
Q12N50882N5088legend: 2N5088, 2N5089, MPSA18, BC550c, etc; read from the layout by eye
Q22N50882N5088legend: 2N5088, 2N5089, MPSA18, BC550c, etc; read from the layout by eye
Q32N50882N5088legend: 2N5088, 2N5089, MPSA18, BC550c, etc; read from the layout by eye
Q42N50882N5088legend: 2N5088, 2N5089, MPSA18, BC550c, etc; read from the layout by eye
Potentiometers 3
VolumeA100KA100kPotentiometerread from the layout by eye
ToneB100KB100kPotentiometerread from the layout by eye
SustainA100KA100kPotentiometerread from the layout by eye

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