1590B · 3 knobs
Mad Professor Stone Grey DistortionVerified
Based on the Mad Professor Stone Grey Distortion· 7 other boards clone it
- Category
- Distortion
- Controls
- Distortion · Tone · Volume
- Build
- Perfboard
- Layout
- Verified · Effects Layouts (blog) marks it as built and working
- Tags
- Distortion, Mad Professor
From the post
Here's the Stone Grey Distortion from Mad Professor. It's reminiscent of the Distortion +/OD250 circuit, but with a hex inverter stuck after the opamp. It also uses 2 JFETs in the feedback loop of the opamp for clipping. Original op amp is the TL051, but other single opamps can be used (Tl061, 71, etc). Should be an easy fit in a 1590B. Mind the jumper under the CB4069UBE.
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 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
- 14.7K at the left edge (rows L-O): printed clearly on both the board and the diagram, 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 | 200K | 200k | read from the layout by eye | |
| ×1 | 14.7K | 14.7k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| Capacitors 9 | ||||
| ×3 | 100pF | 100p | read from the layout by eye | |
| ×1 | 15pF | 15p | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N4004 | 1N4004 | printed 4004; 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 | ||||
| ×1 | TL051 | TL051 | read from the layout by eye | |
| ×1 | CD4069UBE | CD4069UBE | read from the layout by eye | |
| Potentiometers 3 | ||||
| Distortion | 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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