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PROJECT NAME
PENUMBRA
BASED ON
Zvex Woolly Mammoth / Mastotron
EFFECT TYPE
Bass fuzz
PROJECT SUMMARY
A full-frequency silicon fuzz, originally designed for bass but just as suited for guitar. Famously used by
Chris Wolstenholme of Muse.
Actual size is 2.3" x 1.86" (main board) and 1.78" x 0.86" (bypass board).
PENUMBRA BASS FUZZ
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.1 (2019-12-23)
1
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Related Manuals for Aion Electronics PENUMBRA BASS FUZZ
Summary of Contents for Aion Electronics PENUMBRA BASS FUZZ
- Page 1 PROJECT SUMMARY A full-frequency silicon fuzz, originally designed for bass but just as suited for guitar. Famously used by Chris Wolstenholme of Muse. Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.86” (bypass board). PENUMBRA BASS FUZZ...
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Page 2: Table Of Contents
10 Document Revisions INTRODUCTION The Penumbra Bass Fuzz is inspired by the Zvex Woolly Mammoth and Mastotron, taking elements from each but with some modifications for better usability. The Woolly Mammoth is a full-frequency fuzz with no low-end cut, making it great for bass, but of course it works great on guitar as well. -
Page 3: Parts List
Electrolytic capacitor, 6.3mm 100uF Electrolytic capacitor, 6.3mm 100n MLCC capacitor, X7R 1N5817 Schottky diode, DO-41 2N5457 JFET, N-channel, TO-92 Any general purpose JFET should be fine here (2N5458, MPF102). 2N3904 BJT transistor, NPN, TO-92 2N3904 BJT transistor, NPN, TO-92 PENUMBRA BASS FUZZ... - Page 4 DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. BATT Battery snap 9V battery snap Optional. Use the soft plastic type—the hard-shell type will not fit. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. PENUMBRA BASS FUZZ...
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Page 5: Build Notes
Jumper the two center pads of the toggle switch together (pads 2 and 6) and omit the following parts: • C1-2 • R1-4 • Q1 • XFM1 PENUMBRA BASS FUZZ... -
Page 6: Schematic
SCHEMATIC 100R 1N5817 100n 100uF XFM1 42TL019 SW2B 2N3904 SW2A 2N5457 2N3904 100uF PINCH 500kB 220n PENUMBRA BASS FUZZ... -
Page 7: Drill Template
ø9/32” x: 0, y: +1.06 ø1/4” TONE PICKUP PINCH x: -0.775, y: +0.41 x: 0, y: +0.41 x: +0.775, y: +0.41 ø9/32” ø1/4” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” PENUMBRA BASS FUZZ... -
Page 8: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B PENUMBRA BASS FUZZ... -
Page 9: Wiring Diagram
WIRING DIAGRAM N.C. N.C. OUT GND +V +V JACK GND JACK GND GND PCB 125B PENUMBRA BASS FUZZ... -
Page 10: Document Revisions
The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.1 (2019-12-23) Updated drill template - the knobs were spaced too far apart originally. 1.0.0 (2019-08-31) Initial release. PENUMBRA BASS FUZZ...
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