Enclosure not stated · 6 knobs
Nine Volt Nirvana Dinosaur Fuzz
Based on the Nine Volt Nirvana Dinosaur Fuzz
- Category
- Fuzz
- Price
- see vendor
From the vendor
The earlier relative of the Dino Drive: a pregain pot and simple tone control into a 2N3906 and B22 germanium Fuzz Face pair, with an SPDT channel switch for a rhythm volume and a 2N3906 output stage. This is the version from Aron Nelson's site.
Bias: set the trim for -4.5V at Q2's collector. Turn the treble trim fully counterclockwise, and clockwise to taste for accentuated highs. Install a socket for the .001uF cap at the rhythm volume for easy modding.
Schematic
The schematic is in the post. Open it at Revolution Deux. No KiCad fragment has been drawn for this circuit yet.
Parts list 28 rows
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Check before you build · 2 values the reader of this schematic was not sure of
- The drawing's text says 'tune 20K trim' for bias and 'tune 470k trim' for highs, but the trimmers are drawn as 25K and 500K; the drawn values are used.
- Q2 is labeled 'B22' (a germanium PNP).
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 9 | ||||
| R1 | 3.9K | 3.9k | read from the schematic by eye | |
| R2 | 33K | 33k | read from the schematic by eye | |
| R3 | 75K | 75k | read from the schematic by eye | |
| R4 | 390 | 390 | read from the schematic by eye | |
| R5 | 470K | 470k | read from the schematic by eye | |
| R6 | 100K | 100k | read from the schematic by eye | |
| R7 | 3.9K | 3.9k | read from the schematic by eye | |
| R8 | 820 | 820 | read from the schematic by eye | |
| R9 | 2K | 2k | read from the schematic by eye | |
| Capacitors 9 | ||||
| C1 | 2.2n | 2.2n | drawn 2200pF; read from the schematic by eye | |
| C2 | 5n | 5n | silver mica; read from the schematic by eye | |
| C3 | 3.3u | 3.3u | electrolytic; read from the schematic by eye | |
| C4 | 1u | 1u | electrolytic; read from the schematic by eye | |
| C5 | 5n | 5n | read from the schematic by eye | |
| C6 | 1n | 1n | read from the schematic by eye | |
| C7 | 1u | 1u | electrolytic; read from the schematic by eye | |
| C8 | 47u | 47u | read from the schematic by eye | |
| C9 | 1n | 1n | mylar; read from the schematic by eye | |
| Transistors 3 | ||||
| Q1 | 2N3906 | 2N3906 | read from the schematic by eye | |
| Q2 | B22 | 2SB22 | germanium; read from the schematic by eye | |
| Q3 | 2N3906 | 2N3906 | read from the schematic by eye | |
| Potentiometers 6 | ||||
| Pregain | 250K | 250k | Potentiometer | read from the schematic by eye |
| Tone | 100K | 100k | Potentiometer | read from the schematic by eye |
| Bias trim | 25K | 25k | Potentiometer | trimmer; read from the schematic by eye |
| Rhythm Volume | 250K | 250k | Potentiometer | read from the schematic by eye |
| Volume | 100K | 100k | Potentiometer | read from the schematic by eye |
| Treble trim | 500K | 500k | Potentiometer | trimmer; read from the schematic by eye |
| Switches 1 | ||||
| Channel | SPDT | SPDT | read from the schematic by eye | |