1590B · 3 knobs
Craig Anderton TremoloVerified
Based on the Craig Anderton Tremolo
From the post
To say Craig Anderton's body of work is vast is probably an understatement. But within that body are several DIY classics, and this tremolo is no exception. This is a modified/updated version, specifically in the power section with a +/- 9v charge pump. The vactrol in the original is VTL5C1, but some combination of home rolled LDR/LED combo will probably work (you'll just have to experiment a bit). Schematic here. It'll be snug, but it should fit in a 1590B.
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 21 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 8 | ||||
| ×3 | 1K | 1k | read from the layout by eye | |
| ×2 | 2.2K | 2.2k | read from the layout by eye | |
| ×2 | 4.7K | 4.7k | read from the layout by eye | |
| ×1 | 6.8K | 6.8k | read from the layout by eye | |
| ×1 | 15K | 15k | read from the layout by eye | |
| ×2 | 100K | 100k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| Capacitors 3 | ||||
| ×1 | 220nF | 220n | read from the layout by eye | |
| ×5 | 10uF | 10u | electrolytic; read from the layout by eye | |
| ×2 | 100uF | 100u | electrolytic; read from the layout by eye | |
| Transistors 1 | ||||
| Q1 | 2N3906 | 2N3906 | read from the layout by eye | |
| ICs 3 | ||||
| ×1 | CD4049UBE | CD4049UBE | read from the layout by eye | |
| ×1 | TL072 | TL072 | read from the layout by eye | |
| ×1 | MAX1044 | MAX1044 | read from the layout by eye | |
| Opto 1 | ||||
| ×1 | LDR | LDR | type not given; read from the layout by eye | |
| Potentiometers 3 | ||||
| Speed | B50K | B50k | Potentiometer | read from the layout by eye |
| Depth | B25K | B25k | Potentiometer | read from the layout by eye |
| Level | A10K | A10k | Potentiometer | read from the layout by eye |
| Switches 1 | ||||
| Wave | SPDT on/on | SPDT ON/ON | toggle; read from the layout by eye | |
| LEDs 1 | ||||
| ×1 | LED | LED | on the board, type not given, drawn red; read from the layout by eye | |