Enclosure not stated · 2 knobs
Lovepedal Karl (2-knob version)Verified
Based on the Lovepedal Karl (2-knob version)
From the post
The Karl is essentially a modified Tim Escobedo Tripple Fuzz, basing it's sound around an NPN/PNP transistor network known as a "non-selective frequency tripler." I modified the power section a little bit. The original has an unnecessary 47µ cap at 9v input before the 330Ω resistor which I eliminated. I also moved the anti-popping pull down resistor to before the Intensity pot (the original had it after) and it might not even be necessary at all. But better safe than sorry.
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 20 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 7 | ||||
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 3.3M | 3.3M | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×2 | 10K | 10k | read from the layout by eye | |
| ×1 | 330Ω | 330 | read from the layout by eye | |
| ×1 | 2.2K | 2.2k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×1 | 47nF | 47n | read from the layout by eye | |
| ×2 | 220nF | 220n | read from the layout by eye | |
| ×1 | 390pF | 390p | read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| ×1 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| ×1 | 1N4001 | 1N4001 | printed 4001; read from the layout by eye | |
| D1 | 1N4148 | 1N4148 | read from the layout by eye | |
| D2 | BAT46 | BAT46 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N5089 | 2N5089 | read from the layout by eye | |
| Q2 | 2N3906 | 2N3906 | read from the layout by eye | |
| Q3 | 2N3904 | 2N3904 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Intensity | B5K | B5k | Potentiometer | 5K Lin; read from the layout by eye |
| Volume | B500K | B500k | Potentiometer | 500K Lin; read from the layout by eye |