125B · 5 knobs
Nysiad GermaniumFuzz
Based on the Cornish NG-2
- Category
- Fuzz· Misbiased fuzz
- Controls
- Drive · Sustain · Bias · Tone · Volume
- Difficulty
- Intermediate
- Price
- $12.50in stock
From the vendor
A variable-bias silicon & germanium fuzz designed to emulate “imminent amp death”, the sound of a blown power tube or output transformer right before it all goes up in smoke.
The Nysiad Germanium Fuzz is an adaptation of the Cornish NG-2, originally traced by Aion FX in 2024. While it has a lot in common with the later NG-3 (available as our Nysiad Silicon project), there are enough substantial differences that we split them into two different projects.
Like the NG-3, the NG-2 is designed to simulate “imminent amp death”, the sound of a bad output transformer or power tube right before the fuse blows (or worse). You can get some fairly traditional sounds from it if the bias knob is all the way up, but once you start to dial it down, the tone quickly turns into a glitchy mess, complete with gating, sag, feedback, velcro, instability, and anything else you’d associate with a misbiased fuzz.
The main difference in the NG-2 is the use of germanium transistors for the clipping stage, as compared to the silicon transistors in the NG-3. On the original NG-2, the bias control was an internal trimmer, but in this adaptation we made it external like the NG-3, which means that the transistors are the main difference between the two projects.
Other than the bias control, the Nysiad Germanium is identical to the NG-2 unit that we traced. As with our other Cornish-based projects, we have added an internal slide switch for a true bypass mode not found in the original.
Schematic
The schematic is in the vendor's build document, page 8. Open the build document. No KiCad fragment has been drawn for this circuit yet.
Parts list 92 rows
Report a wrong parse| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 43 | ||||
| R1 | 10M | 10M | Metal film resistor, 1/4W | |
| R2 | 1k | 1k | Metal film resistor, 1/4W | |
| R3 | 120k | 120k | Metal film resistor, 1/4W | |
| R4 | 120k | 120k | Metal film resistor, 1/4W | |
| R5 | 200k | 200k | Metal film resistor, 1/4W | |
| R6 | 7k5 | 7.5k | Metal film resistor, 1/4W | |
| R7 | 10k | 10k | Metal film resistor, 1/4W | |
| R8 | 51R | 51 | Metal film resistor, 1/4W | |
| R9 | 100k | 100k | Metal film resistor, 1/4W | |
| R10 | 1M | 1M | Metal film resistor, 1/4W | |
| R11 | 1M | 1M | Metal film resistor, 1/4W | |
| R12 | 3k9 | 3.9k | Metal film resistor, 1/4W | |
| R13 | 10k | 10k | Metal film resistor, 1/4W | |
| R14 | 1k5 | 1.5k | Metal film resistor, 1/4W | |
| R15 | 470k | 470k | Metal film resistor, 1/4W | |
| R16 | 51k | 51k | Metal film resistor, 1/4W | |
| R17 | 10k | 10k | Metal film resistor, 1/4W | |
| R18 | 1k | 1k | Metal film resistor, 1/4W | |
| R19 | 3k9 | 3.9k | Metal film resistor, 1/4W | |
| R20 | 30k | 30k | Metal film resistor, 1/4W | |
| R21 | 75R | 75 | Metal film resistor, 1/4W | |
| R22 | 220k | 220k | Metal film resistor, 1/4W | |
| R23 | 10k | 10k | Metal film resistor, 1/4W | |
| R24 | 68k | 68k | Metal film resistor, 1/4W | Jumper in original, but 68k gives better control range for external pot. |
| R25 | 30k | 30k | Metal film resistor, 1/4W | |
| R26 | 12k | 12k | Metal film resistor, 1/4W | |
| R27 | 27k | 27k | Metal film resistor, 1/4W | |
| R28 | 27k | 27k | Metal film resistor, 1/4W | |
| R29 | 330k | 330k | Metal film resistor, 1/4W | |
| R30 | 100k | 100k | Metal film resistor, 1/4W | |
| R31 | 120k | 120k | Metal film resistor, 1/4W | |
| R32 | 120k | 120k | Metal film resistor, 1/4W | |
| R33 | 200k | 200k | Metal film resistor, 1/4W | |
| R34 | 5k1 | 5.1k | Metal film resistor, 1/4W | |
| R35 | 10k | 10k | Metal film resistor, 1/4W | |
| R36 | 91R | 91 | Metal film resistor, 1/4W | |
| R37 | 100R | 100 | Metal film resistor, 1/4W | |
| R38 | 100R | 100 | Metal film resistor, 1/4W | |
| R39 | 100R | 100 | Metal film resistor, 1/4W | |
| R40 | 100R | 100 | Metal film resistor, 1/4W | |
| R41 | 91R | 91 | Metal film resistor, 1/4W | |
| R42 | 51k | 51k | Metal film resistor, 1/4W | |
| LEDR | 10k | 10k | Metal film resistor, 1/4W | LED current-limiting resistor. Adjust value to change LED brightness. |
| Capacitors 27 | ||||
| C1 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C2 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C3 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C4 | 22uF | 22u | Electrolytic capacitor, 5mm | |
| C5 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C6 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C7 | 100pF | 100p | MLCC capacitor, NP0/C0G | |
| C8 | 220n | 220n | Film capacitor, 7.2 x 2.5mm | |
| C9 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C10 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C11 | 47uF | 47u | Electrolytic capacitor, 5mm | |
| C12 | 47n | 47n | Film capacitor, 7.2 x 2.5mm | |
| C13 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C14 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C15 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C16 | 220n | 220n | Film capacitor, 7.2 x 2.5mm | |
| C17 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C18 | 10n | 10n | Film capacitor, 7.2 x 2.5mm | |
| C19 | 100n | 100n | Film capacitor, 7.2 x 2.5mm | |
| C20 | 1n | 1n | Film capacitor, 7.2 x 2.5mm | |
| C21 | 4.7uF | 4.7u | Electrolytic capacitor, 4mm | |
| C22 | 22uF | 22u | Electrolytic capacitor, 5mm | |
| C23 | 220uF | 220u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C24 | 220uF | 220u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C25 | 220uF | 220u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C26 | 220uF | 220u | Electrolytic capacitor, 6.3mm | Power supply filter capacitor. |
| C27 | 100n | 100n | MLCC capacitor, X7R | Power supply filter capacitor. |
| Diodes 3 | ||||
| D1 | 1N5817 | 1N5817 | Schottky diode, DO-41 | |
| D2 | 1N914 | 1N914 | Fast-switching diode, DO-35 | |
| Z1 | LM4040DIZ-5.0 | LM4040DIZ-5.0 | Zener / voltage reference, TO-92 | Can also use LM4040CIZ-5.0. |
| Transistors 6 | ||||
| Q1 | BC549C | BC549C | BJT transistor, NPN, TO-92 | |
| Q2 | NPN Ge | NPN GE | BJT transistor, germanium, NPN | See build notes for germanium transistor selection. |
| Q3 | NPN Ge | NPN GE | BJT transistor, germanium, NPN | See build notes for germanium transistor selection. |
| Q4 | BC549C | BC549C | BJT transistor, NPN, TO-92 | |
| Q5 | BC549C | BC549C | BJT transistor, NPN, TO-92 | |
| IC1-S | DIP-8 socket | DIP-8 SOCKET | BJT transistor, NPN, TO-92 | |
| ICs 1 | ||||
| IC1 | TL071 | TL071 | BJT transistor, NPN, TO-92 | |
| Potentiometers 5 | ||||
| DRIVE | 100kA | A100k | 16mm right-angle PCB mount pot | |
| SUSTAIN | 100kB | B100k | 16mm right-angle PCB mount pot | |
| TONE | 100kB | B100k | 16mm right-angle PCB mount pot | |
| BIAS | 100kB | B100k | 16mm right-angle PCB mount pot | |
| VOLUME | 250kA | A250k | 16mm right-angle PCB mount pot | |
| Switches 2 | ||||
| TB-BUF | 4PDT slide | 4PDT SLIDE | Slide switch, 4PDT | E-Switch EG4208 (4mm lever) or EG4208A (6mm lever) |
| FSW | 3PDT | 3PDT | Stomp switch, 3PDT | |
| LEDs 1 | ||||
| LED | 5mm | 5MM | LED, 5mm, red diffused | |
| Jacks & sockets 3 | ||||
| IN | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| OUT | 1/4" mono | 1/4" MONO | 1/4" phone jack, closed frame | Switchcraft 111X or equivalent. |
| DC | 2.1mm | 2.1MM | DC jack, 2.1mm panel mount | Mouser 163-4302-E or equivalent. |
| Hardware 1 | ||||
| ENC | 125B | 125B | Enclosure, die-cast aluminum | Can also use a Hammond 1590N1. |