Enclosure not stated · 3 knobs
Earthquaker Devices Black AshVerified
Based on the EarthQuaker Devices Black Ash· 10 other boards clone it
From the post
From the source:
Limited to 1500 units worldwide, Black Ash is a fuzz/overdrive that takes some cues from the vintage “three-knob Bender.” It uses a highly curated cache of rare and irreplaceable components including paper-in-oil capacitors and NOS half-watt carbon composition resistors from EQD President Jamie Stillman’s personal stash to light a fire under this classic fuzz/drive with an explosive-yet-detailed treble response, a sturdy midrange, and subterranean bass extension.
• Fuzz: Adjusts the amount of gain. Counterclockwise for less fuzz, clockwise for more fuzz.
• Top: Adjusts high frequencies between 2kHz - 10kHz and controls how “forward” the guitar sits in the mix. Counterclockwise for less top, clockwise for more top.
• Level: Sets the output volume. Counterclockwise is quiet, clockwise is loud.
It's essentially a modified silicon tonebender.
Stock:
External Bias:
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 18 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×2 | 100k | 100k | read from the layout by eye | |
| ×1 | 22k | 22k | read from the layout by eye | |
| ×1 | 1k | 1k | read from the layout by eye | |
| ×1 | 47k | 47k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 470k | 470k | read from the layout by eye | |
| ×1 | 4.7k | 4.7k | read from the layout by eye | |
| ×1 | 10k | 10k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×1 | 2.2nF | 2.2n | 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 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 1 | ||||
| ×3 | Low Gain Si | LOW GAIN SI | Q1-Q3; legend gives no part number, only 'Low Gain Si'; read from the layout by eye | |
| Potentiometers 3 | ||||
| Attack | B5K | B5k | Potentiometer | read from the layout by eye |
| Top | B25K | B25k | Potentiometer | read from the layout by eye |
| Level | A100K | A100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10k | 10k | read from the layout by eye | |
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