Enclosure not stated · 3 knobs
King Dubby DelayVerified
Based on the King Dubby Delay· 1 other board clones it
From the post
Here's a really nice delay designed by Nocentelli.
You can find the original thread on FSB here.
This is his description of the circuit:
Here's a variation on the deep blue delay; two PT2399 chips and a current mirror delay pot give around 2200ms delay, although beyond 700ms gets pretty lo-fi. There are two points where a momentary SPST can be used: Either to briefly connect the input to the delay input on select phrases (dub mode), or to bypass the repeats feedback resistor for self-oscillation on demand.
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 41 rows
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Check before you build · 4 values the reader of this layout was not sure of
- 360K at top of board, 4th resistor from the left: printed clearly, unusual value
- 5K at right edge near Repeat 2: printed clearly, unusual value
- 20K ×4 and 2K: printed clearly, unusual values
- 1u box (film) capacitor in the centre of the board next to the 20K pair: drawn as a yellow box, not a can, so listed separately from the four 1u electrolytics
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 16 | ||||
| ×11 | 10K | 10k | read from the layout by eye | |
| ×4 | 20K | 20k | read from the layout by eye | |
| ×3 | 100K | 100k | read from the layout by eye | |
| ×3 | 1K | 1k | read from the layout by eye | |
| ×1 | 15K | 15k | read from the layout by eye | |
| ×1 | 470K | 470k | read from the layout by eye | |
| ×2 | 220R | 220 | read from the layout by eye | |
| ×1 | 33R | 33 | read from the layout by eye | |
| ×1 | 180K | 180k | read from the layout by eye | |
| ×1 | 360K | 360k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 22K | 22k | read from the layout by eye | |
| ×1 | 12K | 12k | read from the layout by eye | |
| ×1 | 4K7 | 4.7k | read from the layout by eye | |
| ×1 | 5K | 5k | read from the layout by eye | |
| ×1 | 2K | 2k | read from the layout by eye | |
| Capacitors 13 | ||||
| ×8 | 100n | 100n | read from the layout by eye | |
| ×4 | 2n2 | 2.2n | read from the layout by eye | |
| ×2 | 4n7 | 4.7n | read from the layout by eye | |
| ×2 | 22n | 22n | read from the layout by eye | |
| ×2 | 15n | 15n | read from the layout by eye | |
| ×1 | 47n | 47n | read from the layout by eye | |
| ×1 | 10n | 10n | 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 | film (box); read from the layout by eye | |
| ×4 | 1u | 1u | electrolytic; read from the layout by eye | |
| ×5 | 47u | 47u | electrolytic; read from the layout by eye | |
| ×1 | 100u | 100u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D2 | 1N4148 | 1N4148 | read from the layout by eye | |
| D3 | 1N4148 | 1N4148 | read from the layout by eye | |
| Transistors 1 | ||||
| ×2 | 2N5087 | 2N5087 | printed 5087; read from the layout by eye | |
| ICs 3 | ||||
| ×1 | TL072 | TL072 | read from the layout by eye | |
| ×2 | PT2399 | PT2399 | read from the layout by eye | |
| ×1 | 7805 | 7805 | regulator; read from the layout by eye | |
| Potentiometers 3 | ||||
| Level | B50K | B50k | Potentiometer | read from the layout by eye |
| Repeat | B50K | B50k | Potentiometer | read from the layout by eye |
| Delay | B10K | B10k | Potentiometer | read from the layout by eye |
| Switches 2 | ||||
| Oscillation | SPST momentary | SPST MOMENTARY | read from the layout by eye | |
| Dub On/Off | DPDT | DPDT | read from the layout by eye | |
| LEDs 1 | ||||
| D1 | 5mm green diffused | 5MM GREEN DIFFUSED | on board; read from the layout by eye | |
Other boards based on the King Dubby Delay
- King Dubby Delay Effects Layouts (blog)