Enclosure not stated · 2 knobs
NPN Si Tonebender MKIIVerified
Based on the NPN Si Tonebender MKII
From the post
This one's for those who had trouble with the Ge layouts. It adds Orman's and Tremblay's mods to the classic and it is supposed to sound like the real thing. If you want, you could swap the 5K6 resistor for 10 trimmer or even take it off board to act as a bias control. Transistors are supposed to be very low hFE Si devices, so you should be golden with 2N2369 or 2N3903.
Already verified by Rudeez. He also suggests that 2K lin pot for attack will work a lot better than 1K.
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 20 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 10 | ||||
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 2.2M | 2.2M | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×1 | 100Ω | 100 | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 47K | 47k | read from the layout by eye | |
| ×1 | 1K | 1k | read from the layout by eye | |
| ×1 | 5.6K | 5.6k | read from the layout by eye | |
| ×1 | 220Ω | 220 | read from the layout by eye | |
| Capacitors 4 | ||||
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×2 | 100nF | 100n | read from the layout by eye | |
| ×2 | 4.7uF | 4.7u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N2369 | 2N2369 | legend: 2N2369, 2N3903 or other very low gain NPN Si; read from the layout by eye | |
| Q2 | 2N2369 | 2N2369 | legend: 2N2369, 2N3903 or other very low gain NPN Si; read from the layout by eye | |
| Q3 | 2N2369 | 2N2369 | legend: 2N2369, 2N3903 or other very low gain NPN Si; read from the layout by eye | |
| Potentiometers 2 | ||||
| Attack | B1K | B1k | Potentiometer | read from the layout by eye |
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |