125B · 3 knobs
From the vendor
King Nothing is a tasty 12AX7 overdrive with a JFET boost up front to push it into a heavier drive. With three-way toggles for “mode” and “lows” you can dial in a wide range of tones. I will caveat that the circuit as designed doesn’t work great with bass, but could probably be modded to be more suitable if that’s something you’re itching for.
Schematic
The schematic is in the vendor's build document, page 5. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 40 rows
Report a wrong parseGot parts in a drawer? See what you can build with them.
ocr read from an image · sch paired from the schematic · fixed corrected by hand. Check marked values against the build document.
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 15 | ||||
| ×1 | 560R | 560 | 1/4W Resistor | shopping list |
| ×2 | 1k | 1k | 1/4W Resistor | shopping list |
| ×2 | 1k5 | 1.5k | 1/4W Resistor | shopping list |
| ×1 | 2k2 | 2.2k | 1/4W Resistor | shopping list |
| ×1 | 4k7 | 4.7k | 1/4W Resistor | shopping list |
| ×1 | 6k2 | 6.2k | 1/4W Resistor | shopping list |
| ×3 | 10k | 10k | 1/4W Resistor | shopping list |
| ×1 | 47k | 47k | 1/4W Resistor | shopping list |
| ×1 | 68k | 68k | 1/4W Resistor | shopping list |
| ×1 | 82k | 82k | 1/4W Resistor | shopping list |
| ×2 | 100k | 100k | 1/4W Resistor | shopping list |
| ×3 | 220k | 220k | 1/4W Resistor | shopping list |
| ×1 | 330k | 330k | 1/4W Resistor | shopping list |
| ×4 | 470k | 470k | 1/4W Resistor | shopping list |
| ×2 | 1M | 1M | 1/4W Resistor | shopping list |
| Capacitors 12 | ||||
| ×1 | 1n | 1n | Film capacitor | shopping list; 50V |
| ×1 | 1n5 | 1.5n | Film capacitor | shopping list; 50V |
| ×2 | 2n2 | 2.2n | Film capacitor | shopping list; 50V |
| ×1 | 2n2 | 2.2n | High voltage film capacitor | shopping list; 630V |
| ×2 | 4n7 | 4.7n | Film capacitor | shopping list; 50V |
| ×1 | 22n | 22n | Film capacitor | shopping list; 50V |
| ×1 | 22n | 22n | High voltage film capacitor | shopping list; 630V |
| ×2 | 150n | 150n | Film capacitor | shopping list; 50V |
| ×1 | 1u | 1u | Electrolytic capacitor | shopping list; 25V |
| ×1 | 4u7 | 4.7u | Electrolytic capacitor | shopping list; 25V |
| ×1 | 10u | 10u | Electrolyitic capacitor | shopping list; 250V |
| ×1 | 100uF | 100u | Electrolyitic capacitor | shopping list; 25V |
| Diodes 2 | ||||
| ×1 | UF4007 | UF4007 | Ultra-fast rectifier diode | shopping list |
| ×1 | 1N5817 | 1N5817 | Schottky diode | shopping list |
| Transistors 3 | ||||
| ×1 | J201 | J201 | N-channel JFET | shopping list |
| ×1 | 2N3904 | 2N3904 | NPN General Purpose Amplifier | shopping list |
| ×1 | IRF740 | IRF740 | 400V 20A N-Channel MOSFET | shopping list |
| ICs 1 | ||||
| ×1 | NE555 | NE555 | Timer IC | shopping list |
| Inductors 1 | ||||
| ×1 | 100uH | 100uH | 100uH 2A Inductor | shopping list |
| Potentiometers 3 | ||||
| Gain | A500Ksch | A500k | Potentiometer | |
| Tone | B100Ksch | B100k | Potentiometer | |
| Volume | A25Ksch | A25k | Potentiometer | |
| Switches 2 | ||||
| ×1 | SPDT | SPDT | 3-position SPDT toggle | shopping list |
| ×1 | DPDT | DPDT | 3-position DPDT toggle | shopping list |
| Other 1 | ||||
| ×1 | 12AX7 | 12AX7 | Dual Triode | shopping list |