Enclosure not stated · 3 knobs
Nobels DT1 DistortionVerified
Based on the Nobels DT1 Distortion
- Category
- Distortion
- Controls
- Distortion · Tone · Level
- Build
- Vero· 21×12· 15 cuts, 6 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Distortion, Nobels
From the post
Not too much info around on this beloved cheapo pedal, but it seems to be of fairly good design. For the layout, i've omitted the input buffer to keep the size down. The output buffer has 2SK30-style pinout for couple of reasons. First, the original (schematic states K222E) is not that common. Second, it's just a buffer, so you should have exactly the same results with any NPN BJT in its place. Third, some of you might really want to try this with a BJT instead of JFET to preserve the stock they have. I thought about omitting the output buffer too, but the tonestack has vref voltage in it, so there has to be something to put that out before the output.
Straight-as-straight-can-be Distortion. A must-have for every Hardrock or Heavy Metal player.
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 29 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
- D5 label is half hidden under the JFET body at top centre; read as D5 by elimination (D4 and D6 are visible)
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 3.3K | 3.3k | read from the layout by eye | |
| ×2 | 18K | 18k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 68K | 68k | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 15K | 15k | read from the layout by eye | |
| ×1 | 390K | 390k | read from the layout by eye | |
| Capacitors 10 | ||||
| ×1 | 330pF | 330p | read from the layout by eye | |
| ×1 | 1.5nF | 1.5n | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×1 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 33nF | 33n | read from the layout by eye | |
| ×2 | 68nF | 68n | read from the layout by eye | |
| ×1 | 150nF | 150n | read from the layout by eye | |
| ×1 | 680nF | 680n | read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×2 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 4 | ||||
| D1 | 1N4001 | 1N4001 | legend: 1N4001 or 1N5817; read from the layout by eye | |
| D4 | 1N4148 | 1N4148 | read from the layout by eye | |
| D5 | 1N4148 | 1N4148 | read from the layout by eye | |
| D6 | 1N4148 | 1N4148 | read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | 2SK222E | 2SK222E | JFET; legend: try any JFET or BJT; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | JRC4558 | JRC4558 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Distortion | B250K | B250k | Potentiometer | read from the layout by eye |
| Tone | B50K | B50k | Potentiometer | read from the layout by eye |
| Level | A50K | A50k | Potentiometer | read from the layout by eye |
| LEDs 2 | ||||
| D2 | 3mm red LED | 3MM RED LED | read from the layout by eye | |
| D3 | 3mm red LED | 3MM RED LED | read from the layout by eye | |