1590B · 4 knobs
Black Arts Toneworks PharaohVerified
Based on the Black Arts Toneworks Pharaoh· 9 other boards clone it
From the post
Happy #FuzzFriday, everybody! The Pharaoh is a variation of the classic Big Muff circuit, and one of the best out there. It features a modified tone stack with an added highs control. There are also 2 toggle switches added, one that switches between 2 resistors at the input, and one that switches the clipping diodes of the 2nd gain stage. This last switch allows you to select standard silicon diodes, asymmetrical germanium diodes, or no diodes at all. I've added a pull down resistor to the PCB side in case you encounter switch popping. It might fit in a 1590B, but if it were me, I'd feel more comfortable with a 125B. Speaking of which, here's the drilling template for a 125B.
Edit: Q1 should be an MPSA18 and Q2-4 are 2N5089s.
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 28 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
- 2M resistor near Out (bottom right): present on the wiring diagram and PCB only, absent from the populated board; left out of rows
- the two 10uF caps (right of centre and lower right) are drawn as yellow drop shapes, not round cans: read as tantalum, could be any small polarised/film cap
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| ×2 | 100Ω | 100 | read from the layout by eye | |
| ×4 | 100K | 100k | read from the layout by eye | |
| ×5 | 470K | 470k | read from the layout by eye | |
| ×2 | 6.2K | 6.2k | read from the layout by eye | |
| ×4 | 10K | 10k | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| ×2 | 1K | 1k | read from the layout by eye | |
| ×1 | 39K | 39k | read from the layout by eye | |
| ×1 | 390K | 390k | read from the layout by eye | |
| Capacitors 6 | ||||
| ×6 | 470nF | 470n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×1 | 22nF | 22n | read from the layout by eye | |
| ×3 | 470pF | 470p | read from the layout by eye | |
| ×1 | 220uF | 220u | electrolytic; read from the layout by eye | |
| ×2 | 10uF | 10u | tantalum; read from the layout by eye | |
| Diodes 3 | ||||
| ×4 | 1N4148 | 1N4148 | D1, D2, D6, D7; read from the layout by eye | |
| ×3 | germanium | GERMANIUM | D3, D4, D5; read from the layout by eye | |
| ×1 | 1N5817 | 1N5817 | printed 5817; read from the layout by eye | |
| Transistors 4 | ||||
| Q1 | ? | ? | value not given; read from the layout by eye | |
| Q2 | ? | ? | value not given; read from the layout by eye | |
| Q3 | ? | ? | value not given; read from the layout by eye | |
| Q4 | ? | ? | value not given; read from the layout by eye | |
| Potentiometers 4 | ||||
| Fuzz | B100K | B100k | Potentiometer | read from the layout by eye |
| Volume | B100K | B100k | Potentiometer | read from the layout by eye |
| Highs | B25K | B25k | Potentiometer | read from the layout by eye |
| Tone | B250K | B250k | Potentiometer | read from the layout by eye |
| Switches 2 | ||||
| Hi/Lo | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| Clipping | SPDT on/off/on | SPDT ON/OFF/ON | toggle; read from the layout by eye | |
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