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SUSTAINTONEVOLUME

Enclosure not stated · 3 knobs

Tagboard Effects

EHX Big Muff Pi with Tone WickerVerified

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

Category
Fuzz
Controls
Sustain · Tone · Volume
Build
Vero· 20×17· 21 cuts, 6 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Electro Harmonix, Fuzz
Open the layout at Tagboard Effects

From the post

Thanks to Miro for his great work with the trace for this one. This is more an adaptation than a verbatim clone, but will give you the same results. The original used a CD4066 quad bilateral switch to do the Tone Wicker switching which seems very much like an unnecessary inclusion when you consider all it is doing is bypassing the 470p base collector capacitors, so it seemed that instead of using a DPDT switch and CD4066 with the associated increase in required board space, it makes much more sense to simply use a 3PDT toggle for exactly the same results.

Info about the original from Electro Harmonix:

The Big Muff Pi with Tone Wicker taps into the sonic power of the legendary Big Muff Pi, but creates new tonal possibilities at the flick of a switch -- or two. Use the Wicker switch to open up three high-frequency filters for raspy, sustaining distortion with top-end bite, or flick on the Tone switch to bypass the tone control for unabated tonal slam. Want the original Big Muff sound? Just switch off the Wicker and turn on the Tone. The ability to create your own personal Big Muff sound is what truly makes this the Wicked Wicker.

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 33 rows

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Check before you build · 2 values the reader of this layout was not sure of
  • 430p at the bottom edge near Q1: printed clearly, unusual value
  • 27p left of Q1 and 10p at the bottom edge: small print on orange ceramics, read as 27p and 10p
RefValueNormalizedTypeNotes
Resistors 9
×3120R120read from the layout by eye
×1560R560read from the layout by eye
×12K22.2kread from the layout by eye
×610K10kread from the layout by eye
×227K27kread from the layout by eye
×139K39kread from the layout by eye
×4100K100kread from the layout by eye
×4470K470kread from the layout by eye
×12M22.2Mread from the layout by eye
Capacitors 11
×110p10pread from the layout by eye
×127p27pread from the layout by eye
×1100p100pread from the layout by eye
×1430p430pread from the layout by eye
×2470p470pread from the layout by eye
×13n33.3nread from the layout by eye
×110n10nread from the layout by eye
×2470n470nread from the layout by eye
×51u1udrawn as film, not electrolytic; read from the layout by eye
×22u22.2uelectrolytic; read from the layout by eye
×1220u220uelectrolytic; read from the layout by eye
Diodes 4
D11N9141N914read from the layout by eye
D21N9141N914read from the layout by eye
D31N9141N914read from the layout by eye
D41N9141N914read from the layout by eye
Transistors 4
Q1BC550CBC550Cread from the layout by eye
Q2BC550CBC550Cread from the layout by eye
Q3BC550CBC550Cread from the layout by eye
Q4BC550CBC550Cread from the layout by eye
Potentiometers 3
SustainA100KA100kPotentiometerread from the layout by eye
ToneB100KB100kPotentiometerread from the layout by eye
VolumeA500KA500kPotentiometerread from the layout by eye
Switches 2
Tone Wicker3PDT on/on3PDT ON/ONtoggle; read from the layout by eye
Tone BypassDPDT on/onDPDT ON/ONtoggle; read from the layout by eye

Other boards based on the Electro-Harmonix Big Muff Pi