Enclosure not stated · 3 knobs
Electro Harmonix Attack Equalizer / Knockout EQ
Based on the Electro-Harmonix Knockout Attack Equalizer· 1 other board clones it
- Category
- EQ / Filter
- Build
- Vero· 25×23· 37 cuts, 18 links
- Layout
- Unverified · no build reported at Dirtbox Layouts yet
- Tags
- Electro Harmonix, Eq
From the post
Found this in an older folthe usuader that I forgot. Includes some necesarry modernazations like true bypass, onbard charge pump, input and output caps and pulldown resistors. Schematics is avaiable HERE.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 33 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| ×2 | 1M | 1M | read from the layout by eye | |
| ×1 | 560K | 560k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×3 | 270K | 270k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×5 | 27K | 27k | read from the layout by eye | |
| ×3 | 22K | 22k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×3 | 2.7K | 2.7k | read from the layout by eye | |
| ×2 | 2.2K | 2.2k | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 11 | ||||
| ×2 | 470pF | 470p | read from the layout by eye | |
| ×3 | 2.2nF | 2.2n | read from the layout by eye | |
| ×2 | 4.7nF | 4.7n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×2 | 22nF | 22n | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×2 | 1uF | 1u | read from the layout by eye | |
| ×2 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×3 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | ? | ? | value not given; read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | BC309 | BC309 | legend: Try BC559, 2N5087 etc; read from the layout by eye | |
| Q2 | BC309 | BC309 | legend: Try BC559, 2N5087 etc; read from the layout by eye | |
| ICs 3 | ||||
| IC1 | 4558 | 4558 | read from the layout by eye | |
| IC2 | 4558 | 4558 | read from the layout by eye | |
| IC3 | ICL7660S | ICL7660S | legend: ICL7660S/MAX1044; read from the layout by eye | |
| Potentiometers 3 | ||||
| Attack | B100K | B100k | Potentiometer | read from the layout by eye |
| Fundamental | B100K | B100k | Potentiometer | read from the layout by eye |
| Blend | B100K | B100k | Potentiometer | read from the layout by eye |
Other boards based on the Electro-Harmonix Knockout Attack Equalizer
- Electro Harmonix Knockout Attack Equalizer Tagboard Effects