Enclosure not stated · 4 knobs
1776 Effects RE-20 stripped downVerified
Based on the 1776 Effects RE-20 stripped down
From the post
Here is another great layout by Sebastian! In his own words... Just wanted to share a layout I did of the RE-20 circuit from the 1776 Multiplex Echo Machine. It seemed like there aren't a lot of options for delay effects with parallel, independent delay controls. For the sake of simplicity (and a layout that would fit in anything smaller than a shoebox), I haven't included either the speed-ramp circuit from the original Multiplex, or the modulation circuit from the Multiplex Jr.
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 Dirtbox Layouts. No KiCad fragment has been drawn for this circuit yet.
Parts list 33 rows
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| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 12 | ||||
| ×12 | 10k | 10k | read from the layout by eye | |
| ×3 | 1k | 1k | read from the layout by eye | |
| ×3 | 20k | 20k | read from the layout by eye | |
| ×2 | 1M | 1M | read from the layout by eye | |
| ×2 | 2k7 | 2.7k | read from the layout by eye | |
| ×1 | 33R | 33 | read from the layout by eye | |
| ×1 | 100k | 100k | read from the layout by eye | |
| ×1 | 200k | 200k | read from the layout by eye | |
| ×1 | 22k | 22k | read from the layout by eye | |
| ×1 | 5k1 | 5.1k | read from the layout by eye | |
| ×1 | 12k | 12k | read from the layout by eye | |
| ×1 | 2k | 2k | read from the layout by eye | |
| Capacitors 13 | ||||
| ×9 | 100n | 100n | read from the layout by eye | |
| ×4 | 1n | 1n | read from the layout by eye | |
| ×3 | 47n | 47n | read from the layout by eye | |
| ×2 | 22n | 22n | read from the layout by eye | |
| ×2 | 10n | 10n | read from the layout by eye | |
| ×2 | 4n7 | 4.7n | read from the layout by eye | |
| ×5 | 1u | 1u | read from the layout by eye | |
| ×1 | 47p | 47p | read from the layout by eye | |
| ×1 | 100p | 100p | read from the layout by eye | |
| ×1 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×2 | 10u | 10u | electrolytic; read from the layout by eye | |
| ×4 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 1 | ||||
| D1 | 1N5819 | 1N5819 | read from the layout by eye | |
| ICs 3 | ||||
| ×2 | PT2399 | PT2399 | read from the layout by eye | |
| ×1 | TL072 | TL072 | read from the layout by eye | |
| Q1 | 78L05 | 78L05 | regulator, OGI pinout; read from the layout by eye | |
| Potentiometers 4 | ||||
| Delay 1 | B50K | B50k | Potentiometer | read from the layout by eye |
| Delay 2 | B50K | B50k | Potentiometer | read from the layout by eye |
| Feedback | B50K | B50k | Potentiometer | read from the layout by eye |
| Mix | B50K | B50k | Potentiometer | read from the layout by eye |