Akashic Guitar effects circuit lookup
SUSTAINTONEVOLUME

Enclosure not stated · 3 knobs

Tagboard Effects

Skreddy Pink FleshVerified

Based on the Skreddy Pink Flesh

Category
Fuzz
Controls
Sustain · Tone · Volume
Build
Vero· 20×17· 20 cuts, 4 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
Fuzz, Skreddy

From the post

Here's the layout for another rare Skreddy effect, like the Mayo posted previously. Info from the builder:

Based on the "triangle-knob" circa 1971 4-transistor fuzz, but I've changed the input capacitor to a more saturated-sounding type like the circa 1973 'rams head' version fuzz. From there, I've tightened up the bass and smoothed out the highs and eliminated the mid scoop. So instead of a raging wall of fuzz, you get a more focused and amp-like tone, without having to stack with eq's and/or other overdrive pedals to smooth things out or bring up the midrange.

The Mayo had scooped mids, whereas the Pink Flesh has switchable flat and boosted (juicy) mids. Using these layouts, the Pink Flesh and Mayo will have more in common with each other if you've used the mids switch shown which will give you a greater variety of mid levels for each pedal. There is still enough of a difference to make it worth having both though!

Update: Some values have been corrected in the layout below after looking at the values in my original. If anyone has built this from the previous layout this summarises the changes:

• 220n cap to Q2 base should be 100n

• 220n cap from Q2 collector to following stage should be 100n (Tropical Fish)

• 100n cap from Tone 2 to Q4 base should be 47n (Greenie)

• 68n output cap should be 100n.

The change in output cap means that a 4PDT switch for Pink Flesh/Mayo modes would now not be required and you could just switch the input caps using a DPDT switch.

Pink Flesh / Mayo switch:

This may not cover all the differences between the Mayo and Pink Flesh because Marc tuned each one by ear to remove fizz and so they could all be almost bespoke, but it'll get you in the right ball park with both and certainly close enough to please most people. If you do get some fizz, just swap the 470p caps to smooth it out, and/or experiment with different transistors until your happy with both circuits.

Gutshot from my original Pink Flesh:

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 35 rows

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Check before you build · 1 value the reader of this layout was not sure of
  • 47n next to Q4 (between the 8K2 and 390K): printed 47n, but the legend refers to a 68n output capacitor that appears nowhere on the board
RefValueNormalizedTypeNotes
Resistors 11
×4100R100read from the layout by eye
×3100K100kread from the layout by eye
×333K33kread from the layout by eye
×3470K470kread from the layout by eye
×38K28.2kread from the layout by eye
×22K72.7kread from the layout by eye
×218K18kread from the layout by eye
×1390K390kread from the layout by eye
×110K10kread from the layout by eye
×156K56kread from the layout by eye
×1820R820read from the layout by eye
Capacitors 11
×4100n100nread from the layout by eye
×3470p470plegend: swap for 220p to 560p to suit transistors; read from the layout by eye
×2220n220nread from the layout by eye
×147p47pread from the layout by eye
×147n47nread from the layout by eye
×14n74.7nread from the layout by eye
×110n10nread from the layout by eye
×110u10uelectrolytic; read from the layout by eye
×1100u100uelectrolytic; read from the layout by eye
×14n74.7non the mids switch; read from the layout by eye
×110n10non the mids switch; read from the layout by eye
Diodes 5
D11N9141N914read from the layout by eye
D21N9141N914read from the layout by eye
D31N9141N914read from the layout by eye
D41N9141N914read from the layout by eye
Dx1N58171N5817read from the layout by eye
Transistors 4
Q12N51332N5133600 - 700 hfe alternatives; read from the layout by eye
Q22N51332N5133600 - 700 hfe alternatives; read from the layout by eye
Q32N51332N5133600 - 700 hfe alternatives; read from the layout by eye
Q42N51332N5133600 - 700 hfe alternatives; read from the layout by eye
Potentiometers 3
SustainB100KB100kPotentiometerread from the layout by eye
ToneB100KB100kPotentiometerread from the layout by eye
VolumeB100KB100kPotentiometerread from the layout by eye
Switches 1
MidsDPDT on/off/onDPDT ON/OFF/ONScooped / Flat / Boosted mids, 3 pos DPDT; read from the layout by eye