1590B · 3 knobs
Apocalypse Audio Four HorsemenVerified
Based on the Apocalypse Audio Four Horsemen Overdrive· 1 other board clones it
From the post
Stumbled across this circuit a little while back and thought it would be a nice change from most of the opamp-based overdrives out there. Should fit nicely in a 1590B.
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 35 rows
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Check before you build · 1 value the reader of this layout was not sure of
- 500Ω ×3 (rows F, M, N): printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 14 | ||||
| ×3 | 500Ω | 500 | read from the layout by eye | |
| ×2 | 39K | 39k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×2 | 3.3M | 3.3M | read from the layout by eye | |
| ×2 | 100Ω | 100 | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×2 | 470K | 470k | read from the layout by eye | |
| ×1 | 150K | 150k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 18K | 18k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 3.9K | 3.9k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 12 | ||||
| ×2 | 560pF | 560p | read from the layout by eye | |
| ×2 | 470pF | 470p | read from the layout by eye | |
| ×2 | 1nF | 1n | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| ×1 | 12V | 12V | zener, printed 12v; read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | 2N5457 | 2N5457 | JFET; read from the layout by eye | |
| Q2 | 2N3391 | 2N3391 | read from the layout by eye | |
| Q3 | BS170 | BS170 | MOSFET; read from the layout by eye | |
| Q4 | 2N1307 | 2N1307 | germanium; read from the layout by eye | |
| Potentiometers 3 | ||||
| Gain | A500K | A500k | Potentiometer | read from the layout by eye |
| Tone | B50K | B50k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
Other boards based on the Apocalypse Audio Four Horsemen Overdrive
- Apocalypse Audio Four Horsemen Overdrive Dirtbox Layouts