1590A · 2 knobs
1590A Tone Bender Mk.IIVerified
Based on the Sola Sound Tone Bender MKII· 22 other boards clone it
From the post
Here's the mighty SolaSound Tone Bender Mk.II shrunk down to fit in a 1590a. I laid it out for NPN transistor, as I really wouldn't want to try and squeeze a charge pump in a 1590a along side the effect board. Like the larger layout I posted last year, you could build the Marshall SupaFuzz with this layout as well. See that post for info on the value changes.
Update 3/22/15: I was trying to build this one to verify it and realized I'd forgotten the feedback resistor that goes from the base of Q2 to the emitter of Q3. The layout above is updated and should be fine now.
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 15 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×3 | 100K | 100k | read from the layout by eye | |
| ×1 | 10K | 10k | read from the layout by eye | |
| ×1 | 8.2K | 8.2k | read from the layout by eye | |
| ×1 | 470Ω | 470 | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| Capacitors 4 | ||||
| ×2 | 10nF | 10n | read from the layout by eye | |
| ×1 | 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 | ||||
| ×1 | 1N4001 | 1N4001 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | NPN germ. | NPN GERM. | legend: Q1-3: NPN germ.; read from the layout by eye | |
| Q2 | NPN germ. | NPN GERM. | legend: Q1-3: NPN germ.; read from the layout by eye | |
| Q3 | NPN germ. | NPN GERM. | legend: Q1-3: NPN germ.; 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 |
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