Akashic Guitar effects circuit lookup
VOLUME

1590A · 1 knob

Effects Layouts (blog)

Electro Harmonix Muff FuzzesVerified

Based on the Electro-Harmonix Muff Fuzz· 14 other boards clone it

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

From the post

Around the same time that the EHX Big Muff was first released in 1969, Mike Matthews also released the Muff Fuzz. It was unrelated to the BMP other than the name, and came in the same small enclosure as the LPB-1 that plugged straight into the guitar. Later it was re-released in a floor pedal as the Little Muff Pi and more recently as the Muff Overdrive. In the mid-70s, the circuit was updated, moving away from the Fuzz Face based transistor circuit to a design based around the popular JRC4558 op-amp. I've laid out both versions below and both should fit in a 1590a.

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 11 rows

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RefValueNormalizedTypeNotes
Resistors 4
×11M1Mread from the layout by eye
×2100K100kread from the layout by eye
×12.7K2.7kread from the layout by eye
×110K10kread from the layout by eye
Capacitors 2
×2100nF100nread from the layout by eye
×147uF47uelectrolytic; read from the layout by eye
Diodes 2
×11N40011N4001read from the layout by eye
×21N34A1N34Agermanium clipping pair; read from the layout by eye
Transistors 2
Q12N39042N3904legend: 2N3904, 2N5088, etc.; read from the layout by eye
Q22N39042N3904legend: 2N3904, 2N5088, etc.; read from the layout by eye
Potentiometers 1
VolumeA100KA100kPotentiometerread from the layout by eye

Other boards based on the Electro-Harmonix Muff Fuzz