Akashic Guitar effects circuit lookup
GAINTONELEVEL

Enclosure not stated · 3 knobs

Tagboard Effects

T-Rex MudhoneyVerified

Based on the T-Rex Mudhoney· 1 other board clones it

Category
Distortion
Controls
Gain · Tone · Level
Build
Vero· 21×12· 20 cuts, 5 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Distortion, Overdrive, T-Rex

From the post

Info about the original:

Mark Sullivan from daddys.com wrote this

The Mudhoney is a Distortion/Fuzz pedal with a very wide tonal range. It features a typical 3-knob gain/volume/tone layout plus a boost switch. I played this for a few minutes with the boost off and it is quite impressive; very thick tone with warmth that could quickly find its way to being your main dirt for jazz, blues, etc. Then I pushed the boost and cranked up the gain! The speakers in my little Princeton cried for mercy. Hitting it with the bridge pickup of a Les Paul brought sustain of Spinal Tap proportions. Chords were a menacing wall of sound but yet unlike its name would imply, the Mudhoney didn’t get muddy and muffled. Note and harmonic separation was impressive giving a very dimensional sound at gain levels where most pedals sound flat.

Features

This baby is designed for those who want an in-your-face wall of guitar sound jumping of the speakers.

The boost button and the tone knob enable you to dial in every sound you like right from ultra fuzz to smooth jazz sounds.

In "OFF-MODE" (with the boost-function bypassed) the Mudhoney delivers moderate gain and a smooth rich sound favoured by many jazz-guitarists. For a more hairy sound, -just hit that "boost-button" and feel the rumble from hell.

The BOOST button switches between moderate- and high gain.

The GAIN knob controls the distortion amount.

The LEVEL knob sets the overall volume In mid-position (twelve o’clock) the volume level is 1:1. When turned full over (clockwise) the input signal is boosted 15dB.

The TONE knob affects the top end (edge) of your signal without compromising sonic quality, allowing you to dial in the perfect tonal flavour for you taste.

(Edit on 2023/01/03 - Note that there has been a new version of the traced schematic and we have a layout for it here. It may or may not sound closer to the original Mudhoney.. Read more about it on FSB / Miro)

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 Tagboard Effects. No KiCad fragment has been drawn for this circuit yet.

Parts list 29 rows

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RefValueNormalizedTypeNotes
Resistors 11
×4100K100kread from the layout by eye
×21K1kread from the layout by eye
×210K10kread from the layout by eye
×14K74.7kread from the layout by eye
×1150R150read from the layout by eye
×11M1Mread from the layout by eye
×12K22.2kread from the layout by eye
×1100R100read from the layout by eye
×147R47read from the layout by eye
×11K61.6kread from the layout by eye
×1560R560read from the layout by eye
Capacitors 10
×222n22nread from the layout by eye
×2100n100nread from the layout by eye
×14n74.7nread from the layout by eye
×11n1nread from the layout by eye
×1100p100pread from the layout by eye
×133p33pread from the layout by eye
×34u74.7uelectrolytic; read from the layout by eye
×11u1uelectrolytic; read from the layout by eye
×147u47uelectrolytic; read from the layout by eye
×1100u100uelectrolytic; read from the layout by eye
Diodes 1
×21N41481N4148D1, D2; read from the layout by eye
Transistors 2
Q1BC546BBC546Bread from the layout by eye
Q22N54572N5457JFET; read from the layout by eye
ICs 1
×1OP07CPOP07CPread from the layout by eye
Potentiometers 3
GainB100KB100kPotentiometerread from the layout by eye
ToneB100KB100kPotentiometerread from the layout by eye
LevelB10KB10kPotentiometerread from the layout by eye
Switches 1
BoostSPDTSPDTtoggle, 2 position; read from the layout by eye

Other boards based on the T-Rex Mudhoney