Enclosure not stated · 2 knobs
Tone Bender MkII - PNP with negative groundVerified
Based on the Tone Bender MkII - PNP with negative ground
From the post
Request. This will allow you to use the better quality PNP germanium transistors, but keep a negative ground so it can be daisy chained with all you other NPN effects.
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 16 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 4 | ||||
| ×3 | 100K | 100k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 8K2 | 8.2k | read from the layout by eye | |
| ×1 | 470R | 470 | read from the layout by eye | |
| Capacitors 6 | ||||
| ×1 | 10n | 10n | ceramic, next to the IC; read from the layout by eye | |
| ×1 | 10nF | 10n | box film; read from the layout by eye | |
| ×1 | 100nF | 100n | box film; read from the layout by eye | |
| ×2 | 4u7 | 4.7u | electrolytic; one axial beside the IC, one radial; read from the layout by eye | |
| ×1 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×1 | 47u | 47u | electrolytic; read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | PNP Germanium | PNP GERMANIUM | type not given; legend: consider a matched Tonebender set; read from the layout by eye | |
| Q2 | PNP Germanium | PNP GERMANIUM | type not given; legend: consider a matched Tonebender set; read from the layout by eye | |
| Q3 | PNP Germanium | PNP GERMANIUM | type not given; legend: consider a matched Tonebender set; read from the layout by eye | |
| ICs 1 | ||||
| IC | ICL7660S | ICL7660S | read from the layout by eye | |
| Potentiometers 2 | ||||
| Volume | A100K | A100k | Potentiometer | read from the layout by eye |
| Attack | B1K | B1k | Potentiometer | read from the layout by eye |