Enclosure not stated · 2 knobs
Korg FK-2 Mr. Multi
Based on the Korg FK-2 Mr. Multi· 1 other board clones it
- Category
- EQ / Filter
- Controls
- Depth · Pedal
- Build
- Vero· 30×30· 52 cuts, 26 links
- Layout
- Unverified · no build reported at Dirtbox Layouts yet
- Tags
- Filter, Korg, Modulation, Phaser, Wah
From the post
Another weird one! A rotary selector selects between a four stage phaser, wah and phaser and wah combined. The latter mode is supposed to be something out of this world. Deadend Fx (who else) have a projects for this beast and as usual, don't hesitate to support these guys by bying some nifty PCBs. They also included some useful mods such a Depth control for the LFO and two trimpots to fine tune the LFO and the sweep of the wah pot. Build docs, schematic and setup guide HERE. And HERE is the stock schematic.
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 39 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
Check before you build · 2 values the reader of this layout was not sure of
- Depth appears twice: a 10K trimmer labelled Depth on the board and a 100kB Depth pot in the legend (wired at Depth 1/2/3); both are listed
- D1 is given only as a 3,5 -> 4,1v Zener (a range, no part number)
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 13 | ||||
| ×1 | 1.5K | 1.5k | read from the layout by eye | |
| ×1 | 2.7K | 2.7k | read from the layout by eye | |
| ×1 | 3.3K | 3.3k | read from the layout by eye | |
| ×1 | 4.7K | 4.7k | read from the layout by eye | |
| ×2 | 8.2K | 8.2k | read from the layout by eye | |
| ×10 | 22K | 22k | read from the layout by eye | |
| ×4 | 39K | 39k | read from the layout by eye | |
| ×11 | 47K | 47k | read from the layout by eye | |
| ×1 | 100K | 100k | read from the layout by eye | |
| ×1 | 220K | 220k | read from the layout by eye | |
| ×1 | 330K | 330k | read from the layout by eye | |
| ×10 | 470K | 470k | read from the layout by eye | |
| ×1 | ? | ? | LED resistor, value not given; read from the layout by eye | |
| Capacitors 9 | ||||
| ×1 | 100pF | 100p | read from the layout by eye | |
| ×4 | 2nF | 2n | read from the layout by eye | |
| ×1 | 10nF | 10n | read from the layout by eye | |
| ×7 | 100nF | 100n | six film, one ceramic; read from the layout by eye | |
| ×5 | 1uF | 1u | electrolytic; read from the layout by eye | |
| ×1 | 2.2uF | 2.2u | electrolytic; read from the layout by eye | |
| ×1 | 6.8uF | 6.8u | electrolytic; read from the layout by eye | |
| ×1 | 33uF | 33u | electrolytic; read from the layout by eye | |
| ×2 | 220uF | 220u | electrolytic; read from the layout by eye | |
| Diodes 3 | ||||
| D1 | 3.5-4.1V Zener | 3.5-4.1V ZENER | legend: 3,5 -> 4,1v Zener; read from the layout by eye | |
| ×3 | 1N4148 | 1N4148 | D2, D3, D4; read from the layout by eye | |
| D5 | 1N5817 | 1N5817 | read from the layout by eye | |
| Transistors 5 | ||||
| Q1 | 2SK30-GR | 2SK30-GR | JFET; read from the layout by eye | |
| Q2 | 2SK30-GR | 2SK30-GR | JFET, Q2-Q4 matched; read from the layout by eye | |
| Q3 | 2SK30-GR | 2SK30-GR | JFET, Q2-Q4 matched; read from the layout by eye | |
| Q4 | 2SK30-GR | 2SK30-GR | JFET, Q2-Q4 matched; read from the layout by eye | |
| Q5 | 2SK30-GR | 2SK30-GR | JFET; read from the layout by eye | |
| ICs 2 | ||||
| IC1 | LM358 | LM358 | read from the layout by eye | |
| IC2 | LM324 | LM324 | read from the layout by eye | |
| Potentiometers 2 | ||||
| Depth | B100K | B100k | Potentiometer | read from the layout by eye |
| Pedal | B1M | B1M | Potentiometer | wah pot; read from the layout by eye |
| Trimmers 3 | ||||
| Depth | 10K | 10k | read from the layout by eye | |
| Bias | 10K | 10k | read from the layout by eye | |
| Sweep | 500K | 500k | read from the layout by eye | |
| Switches 2 | ||||
| Mode | 4P3T rotary | 4P3T ROTARY | 1: Phase, 2: Wah, 3: Phase + Wah; read from the layout by eye | |
| Auto/Pedal | 4P3T rotary | 4P3T ROTARY | set to 2 throws; read from the layout by eye | |
Other boards based on the Korg FK-2 Mr. Multi
- Mr. Multi Dead End FX · $15.00