Enclosure not stated · 2 knobs
Interfax HP-1 Harmonic Percolator MOJO layout
Based on the Interfax Harmonic Percolator· 22 other boards clone it
From the post
Compact layout 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 17 rows
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Check before you build · 3 values the reader of this layout was not sure of
- D1, D2: legend prints '1N965' clearly (a Zener number; the Percolator normally uses 1N695), kept as printed
- 50nF green cap at column 6, rows I-K: printed clearly, unusual value
- 91K, 750K, 20K resistors: printed clearly, unusual values
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×1 | 91K | 91k | read from the layout by eye | |
| ×1 | 750K | 750k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 20K | 20k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×1 | 50nF | 50n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 1N965 | 1N965 / 15V | read from the layout by eye | |
| D2 | 1N965 | 1N965 / 15V | read from the layout by eye | |
| D3 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 2 | ||||
| Q1 | 2N404A | 2N404A | germanium PNP; read from the layout by eye | |
| Q2 | 2N3565 | 2N3565 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Harmonics | B100K | B100k | Potentiometer | read from the layout by eye |
| Balance | A50K | A50k | Potentiometer | read from the layout by eye |
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