Enclosure not stated · 2 knobs
Harmonic PercolatorVerified
Based on the Interfax Harmonic Percolator· 22 other boards clone it
From the post
Alf Hermida trace:
Collective effort layout:
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 13 rows
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Check before you build · 3 values the reader of this layout was not sure of
- 737K (top, between the 4th and 5th columns): printed clearly, unusual value (the original uses 750K)
- 90K x2: printed clearly, unusual value (original uses 91K)
- 50nF: printed clearly, unusual value
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×2 | 90K | 90k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 737K | 737k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| Capacitors 4 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×1 | 50nF | 50n | read from the layout by eye | |
| ×2 | 1uF | 1u | film box; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic, printed '47u'; read from the layout by eye | |
| Diodes 1 | ||||
| ×3 | ? | ? | value not given; read from the layout by eye | |
| Transistors 2 | ||||
| ×1 | 2N3565 | 2N3565 | read from the layout by eye | |
| ×1 | 2N404A | 2N404A | PNP germanium; read from the layout by eye | |
| Potentiometers 2 | ||||
| Harmonics | 100K | 100k | Potentiometer | read from the layout by eye |
| Volume | 50K | 50k | Potentiometer | read from the layout by eye |
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