Enclosure not stated · 3 knobs
EQD Black AshVerified
Based on the EarthQuaker Devices Black Ash· 10 other boards clone it
From the post
Hope everyone's having a safe and healthy Fuzz Friday. Found out the Black Ash had been traced and figured I'd draw up a layout. I figured it was a pretty straight Tone Bender Mk II clone, and it is with a simple tone control tacked on just before the volume pot. Was slightly surprised that it uses all silicon transistors. The resistors in the originals are old school carbon comps for the mojo. Here's the schematic for reference. You can probably get away with 4.7k and 47k resistors instead of the 4.6k and 46k resistors listed. Also alternatives to the 2N3903 would be 2N2222a, 2N2369, etc. Shoot for 100-150 hFE.
If you want a fabricated PCB to build on, check out the Earthbender in the store.
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 20 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- 46K at row F: printed clearly, unusual value
- 4.6K at row K: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 46K | 46k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 4.6K | 4.6k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 4 | ||||
| ×1 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×2 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| ×1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N3903 | 2N3903 | read from the layout by eye | |
| Q2 | 2N3903 | 2N3903 | read from the layout by eye | |
| Q3 | 2N3903 | 2N3903 | read from the layout by eye | |
| Potentiometers 3 | ||||
| Fuzz | B5K | B5k | Potentiometer | read from the layout by eye |
| Top | B25K | B25k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | labeled Level on the board; read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10K | 10k | bias trimmer; read from the layout by eye | |
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