Enclosure not stated · 3 knobs
Proco Rat 2Verified
Based on the ProCo RAT 2· 1 other board clones it
- Category
- Distortion
- Build
- Vero· 17×12· 14 cuts, 5 links
- Layout
- Verified · Tagboard Effects marks it as built and working
- Tags
- Distortion, ProCo
From the post
Now, there is only couple of small changes to the output buffer and volume control when compared to the original Rat. The volume control looks like it could give you some trouble with the output level. If it does, just snip the 10K resistor from volume 3 to ground. I would personally use linear taper for that too.. If you want to turn this in to Turbo Rat, then just swap the 2M2 resistor for 220K and use 3mm red LEDs for clippers. Or use 1N34A germanium diodes to make it YouDirtyRat. (fixed clipping info accordingly)
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 26 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
- 1.6K right of the lower 1K, near D1: printed clearly, unusual value (the Rat normally has 1.5K there)
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×1 | 560Ω | 560 | read from the layout by eye | |
| ×1 | 47Ω | 47 | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×2 | 2.2M | 2.2M | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 1.6K | 1.6k | read from the layout by eye | |
| Capacitors 10 | ||||
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 3.3nF | 3.3n | read from the layout by eye | |
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×1 | 33pF | 33p | read from the layout by eye | |
| Diodes 2 | ||||
| ×2 | 1N4148 | 1N4148 | D1, D2; read from the layout by eye | |
| D3 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| ICs 1 | ||||
| IC1 | LM308 | LM308 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | A100K | A100k | Potentiometer | read from the layout by eye |
| Filter | A100K | A100k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
Other boards based on the ProCo RAT 2
- Proco Rat 2 Experimentalists Anonymous