Enclosure not stated · 4 knobs
Nine Volt Nirvana BrontoBoost
Based on the Nine Volt Nirvana BrontoBoost· 1 other board clones it
From the post
Next up of the Nine Volt Nirvana pedals is the BrontoBoost. From Joe.
The new Brontoboost is a two stage booster/fuzz/OD/Dist unit that has a ton of different tones in it, all good! It goes from awesome treble boost like a British top booster, to fullrange boost, to very fat fuzz and everything in between. The fuzz can be set to 'sick', which sounds like an amp on the verge of meltdown! The Brontoboost features tremendous sustain, with a fuzz character that is textured and harmonically rich without sounding like existing fuzzes. Be careful, playing in this compressed , swirly fuzz mode can be addicting, and might bring out a whole new side to your musical expression! "The Bronto is a versatile beast, and has a character unlike any other pedal on the market. Some people simply don't like it, others think it is the most brilliant thing they have ever played! Weird. It does four things, and all of them very well:
• Cleanish boost [treble boost or full range]
• OD, like a TS, but with a much more open and natural feel - responds to your playing in a very satisfying way. Wider freq response than a TS or most other pedals on the market due to the 'quad cap' circuit path - this adds dimension to the freq response.
• Fuzz - mild fuzz all the way to 'amp meltdown' sound. different than any other fuzz I have heard, - compressed yet articulate. Smooth yet alive. Sustain and clarity amidst the fuzzfrenzy . Weird but beautiful.
• Tube amp simulator. I use mine on low volume gigs to replicate the breakup of a tube amp. People are amazed a the tones that are achieved at low volume with it. Like our favorite all time great rock guitar tones but at a very reasonable volume!
The other great thing is that at all settings, it retains an incredible 'gain' control - your guitar 's volume knob! I use the Bront on about 80% of all my guitar work these days due to this versatility. Swiss army knife of preamp/OD/Boost/Distortion/Fuzz."
Quick note: Q3 is Ge, so I assume you can sub the 2SB54 for any other PNP Germanium transistor.
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 21 rows
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Check before you build · 2 values the reader of this layout was not sure of
- 68k resistor at column 15 (rows G-I): partly covered by the 47uF can, read as 68k
- Switch: drawn as an unnamed 9-lug (3PDT) switch with pins 4, 7, 8, 9 unused; whether toggle or footswitch and its function are not stated
| Ref | Value | Normalized | Type | Notes |
|---|---|---|---|---|
| Resistors 5 | ||||
| ×2 | 470k | 470k | read from the layout by eye | |
| ×4 | 10k | 10k | read from the layout by eye | |
| ×1 | 1M | 1M | read from the layout by eye | |
| ×1 | 100k | 100k | read from the layout by eye | |
| ×1 | 68k | 68k | read from the layout by eye | |
| Capacitors 5 | ||||
| ×2 | 1uF | 1u | read from the layout by eye | |
| ×2 | 47nF | 47n | read from the layout by eye | |
| ×3 | 3.3uF | 3.3u | electrolytic; read from the layout by eye | |
| ×1 | 47uF | 47u | electrolytic; read from the layout by eye | |
| ×1 | 1uF | 1u | electrolytic; read from the layout by eye | |
| Diodes 2 | ||||
| D1 | 1N4002 | 1N4002 | read from the layout by eye | |
| D2 | 1N4002 | 1N4002 | read from the layout by eye | |
| Transistors 3 | ||||
| Q1 | 2N3906 | 2N3906 | read from the layout by eye | |
| Q2 | 2N3906 | 2N3906 | read from the layout by eye | |
| Q3 | 2SB54 | 2SB54 | germanium PNP; read from the layout by eye | |
| Potentiometers 4 | ||||
| Tone | 100K | 100k | Potentiometer | dual; read from the layout by eye |
| Gain A | 250K | 250k | Potentiometer | read from the layout by eye |
| Gain B | 25K | 25k | Potentiometer | read from the layout by eye |
| Volume | 100K | 100k | Potentiometer | read from the layout by eye |
| Trimmers 1 | ||||
| ×1 | 10k | 10k | read from the layout by eye | |
| Switches 1 | ||||
| Sw | 3PDT | 3PDT | 9-lug switch, pins 4, 7, 8, 9 not used; read from the layout by eye | |
Other boards based on the Nine Volt Nirvana BrontoBoost
- Nine Volt Nirvana BrontoBoost v3.0 Revolution Deux