Enclosure not stated · 3 knobs
Mad Professor Stone Grey DistortionVerified
Based on the Mad Professor Stone Grey Distortion· 7 other boards clone it
- Category
- Distortion
- 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 parseGot 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
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×4 | 1M | 1M | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×1 | 14K7 | 14.7k | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 200K | 200k | read from the layout by eye | |
| ×1 | 100R | 100 | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| Capacitors 9 | ||||
| ×1 | 15p | 15p | read from the layout by eye | |
| ×3 | 100p | 100p | read from the layout by eye | |
| ×1 | 2n2 | 2.2n | read from the layout by eye | |
| ×1 | 10n | 10n | read from the layout by eye | |
| ×1 | 22n | 22n | read from the layout by eye | |
| ×2 | 47n | 47n | read from the layout by eye | |
| ×1 | 100n | 100n | read from the layout by eye | |
| ×1 | 4u7 | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N4004 | 1N4004 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N3819 | 2N3819 | JFET; read from the layout by eye | |
| Q2 | 2N3819 | 2N3819 | JFET; read from the layout by eye | |
| ICs 2 | ||||
| IC1 | CD4069UBE | CD4069UBE | read from the layout by eye | |
| IC2 | TL051 | TL051 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Dist | A1M | A1M | Potentiometer | read from the layout by eye |
| Tone | A50K | A50k | Potentiometer | read from the layout by eye |
| Volume | A50K | A50k | Potentiometer | read from the layout by eye |
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