Akashic Guitar effects circuit lookup
VOLUMESUSTAINTONE

1590B · 3 knobs

Effects Layouts (blog)

EHX Big Muff - Green RussianVerified

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

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

From the post

With the exception of the IC BMP ('77, '78) you can theoretically build just about any version of the Big Muff on any other version's layouts, but the values listed in this one are for the Tall Font Green Russian version. This one is smaller than the BMP layout I did with on board pots and you should be able to fit it in a 1590B if you shave down the sides of the board a little.

One of the better sounding versions of the Big Muff (IMHO anyway) and sounds great on both guitar and bass.

And if you want to cut through the mix a little better, here's the Green Russian with a modified tone stack, adding a mids control. Pinkjimiphoton over on FSB suggests using a higher value pot for the mids control (250k-1M) than the normal 100k that's listed.

Update 3/16/15:

Modeffected pointed out that these 2 layouts were missing the 12k resistor from the power rail to the collector of Q3. Both layouts have been updated and should be correct now.

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 30 rows

Report a wrong parse

Got parts in a drawer? See what you can build with them.

Check before you build · 1 value the reader of this layout was not sure of
  • 500pF ceramics (three: by Q1, by D1, by Q3): printed clearly, unusual value
RefValueNormalizedTypeNotes
Resistors 12
×11K1kread from the layout by eye
×122K22kread from the layout by eye
×310K10kread from the layout by eye
×4470K470kread from the layout by eye
×4100K100kread from the layout by eye
×139K39kread from the layout by eye
×312K12kread from the layout by eye
×2390Ω390read from the layout by eye
×120K20kread from the layout by eye
×12.7K2.7kread from the layout by eye
×1100Ω100read from the layout by eye
×11M1Mread from the layout by eye
Capacitors 6
×6100nF100nread from the layout by eye
×247nF47nread from the layout by eye
×3500pF500pread from the layout by eye
×13.9nF3.9nread from the layout by eye
×110nF10nread from the layout by eye
×1100uF100uelectrolytic; read from the layout by eye
Diodes 5
D11N9141N914legend: 1N914/1N4148; read from the layout by eye
D21N9141N914legend: 1N914/1N4148; read from the layout by eye
D31N9141N914legend: 1N914/1N4148; read from the layout by eye
D41N9141N914legend: 1N914/1N4148; read from the layout by eye
×11N40011N4001read from the layout by eye
Transistors 4
Q12N50882N5088legend: 2N5088/9, MPSA18, BC548/9, etc; read from the layout by eye
Q22N50882N5088legend: 2N5088/9, MPSA18, BC548/9, etc; read from the layout by eye
Q32N50882N5088legend: 2N5088/9, MPSA18, BC548/9, etc; read from the layout by eye
Q42N50882N5088legend: 2N5088/9, MPSA18, BC548/9, etc; read from the layout by eye
Potentiometers 3
VolumeA100KA100kPotentiometerread from the layout by eye
SustainA100KA100kPotentiometerread from the layout by eye
ToneB100KB100kPotentiometerread from the layout by eye

Other boards based on the Electro-Harmonix Big Muff Pi