Akashic Guitar effects circuit lookup
DISTTONEVOLUME

Enclosure not stated · 3 knobs

Tagboard Effects

Mad Professor Stone Grey DistortionVerified

Based on the Mad Professor Stone Grey Distortion· 7 other boards clone it

Category
Distortion
Controls
Dist · Tone · Volume
Build
Vero· 16×17· 23 cuts, 13 links
Layout
Verified · Tagboard Effects marks it as built and working
Tags
BJF/MP, Distortion

From the post

Info about the original:

BJF design distortion pedal for guitar

The new Mad Professor - Stone Grey Distortion (SGD) is a modern high-gain distortion pedal with unparallelled clarity and definition.

This pedal was developed for high gain applications and specifically for clarity at heavy distortion levels.

The Stone Grey Distortion is unique in that it has razor sharp dynamics and high gain intensity. It's ready for drop tuning, 7 string, and modern rock players who are seeking extreme gain with intense "string to string definition".

Play a chord and hear each note distinctly, instead of it turning to "mush" like many other high gain pedals.

With the gain turned down, the Stone Grey Distortion approaches overdrive-like textures and responds to the player's touch and dynamics like our other Mad Professor pedals do.

Build the Mad Professor way: small footprint and big tone.

Controls

VOLUME: sets the output level of the distorted signal

DISTORTION: sets the level of distortion - lower levels more overdrive-like textures - higher with heavier distortion.

TONE: sets the critical treble response for use with various amplifiers.

Here's an alternative layout for those who want to use mosfets instead of JFETs:

Now verified and here's Milkit's pics showing the double links, just as an added visual guide:

and Geiri's demo of his build:

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 24 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
  • 14K7 (top left, beside the 2n2): printed clearly, unusual value
RefValueNormalizedTypeNotes
Resistors 7
×41M1Mread from the layout by eye
×2470K470kread from the layout by eye
×114K714.7kread from the layout by eye
×14K74.7kread from the layout by eye
×1200K200kread from the layout by eye
×1100R100read from the layout by eye
×110K10kread from the layout by eye
Capacitors 9
×115p15pread from the layout by eye
×3100p100pread from the layout by eye
×12n22.2nread from the layout by eye
×110n10nread from the layout by eye
×122n22nread from the layout by eye
×247n47nread from the layout by eye
×1100n100nread from the layout by eye
×14u74.7uelectrolytic; read from the layout by eye
×1100u100uelectrolytic; read from the layout by eye
Diodes 1
D11N40041N4004read from the layout by eye
Transistors 2
Q12N38192N3819JFET; read from the layout by eye
Q22N38192N3819JFET; read from the layout by eye
ICs 2
IC1CD4069UBECD4069UBEread from the layout by eye
IC2TL051TL051read from the layout by eye
Potentiometers 3
DistA1MA1MPotentiometerread from the layout by eye
ToneA50KA50kPotentiometerread from the layout by eye
VolumeA50KA50kPotentiometerread from the layout by eye

Other boards based on the Mad Professor Stone Grey Distortion