Enclosure not stated · 1 knob
Illumist JFET BoostVerified
Based on the Illumist JFET Boost
From the post
From Solgrind blog. Simple, but apparently great sounding addition to mini booster pot. And nice reason to source some JFETs with DGS pinout - Just in case you didn't have any :D
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 12 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 6 | ||||
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 3 | ||||
| ×1 | 100nF | 100n | read from the layout by eye | |
| ×1 | 1uF | 1u | read from the layout by eye | |
| ×1 | 22uF | 22u | electrolytic; read from the layout by eye | |
| Transistors 1 | ||||
| ×1 | 2SK117 | 2SK117 | JFET, mind the pinout; read from the layout by eye | |
| Potentiometers 1 | ||||
| Boost | B5K | B5k | Potentiometer | wires labelled Gain 2 / Gain 3; read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 5K | 5k | adjust to ~5V at JFET drain; read from the layout by eye | |