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PROJECT NAME
VULCAN
BASED ON
fOXX Tone Machine
EFFECT TYPE
Octave Fuzz
PROJECT SUMMARY
A classic untamed fuzz from the 1970s that adds an octave-up overtone.
Actual size is 2.3" x 1.86" (main board) and 1.78" x 0.86" (bypass board).
VULCAN OCTAVE FUZZ
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.1.0 (2020-06-06)
1
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Summary of Contents for aion VULCAN
- Page 1 Easy EFFECT TYPE DOCUMENT VERSION Octave Fuzz 1.1.0 (2020-06-06) PROJECT SUMMARY A classic untamed fuzz from the 1970s that adds an octave-up overtone. Actual size is 2.3” x 1.86” (main board) and 1.78” x 0.86” (bypass board). VULCAN OCTAVE FUZZ...
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Page 2: Table Of Contents
By increasing the value of the treble-side tone capacitor, it improves the usability. A switch has been added to let you choose between two different capacitors in addition to the original. The build notes for the Vulcan are pretty extensive, so make sure to read pages 5 and 6 before building. USAGE The Vulcan has the following controls: •... -
Page 3: Parts List
Leave empty for stock, or use 22k here for modification. 100n Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm 100n Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 3.5mm Film capacitor, 7.2 x 3.5mm VULCAN OCTAVE 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. VULCAN OCTAVE FUZZ...
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Page 5: Build Notes
Tracing notes: early vs. late version Since releasing the Vulcan initially, Aion FX had the opportunity to trace two original Tone Machines, an early blue one and a later red one. The early version is identical to the commonly available schematics. - Page 6 R23 resistor In Version 1.1 of the Vulcan, a new resistor (R23) was added to one half of the octave generation path. This is a counterpart to R10 that ensures that both sides of the octave signal are held at the same DC voltage.
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Page 7: Schematic
SCHEMATIC 1N5817 100uF 100n MIDRANGE BAT46 2N5089 2N5089 2N5089 2N5089 22uF BAT46 100k 100n VULCAN OCTAVE FUZZ... -
Page 8: Drill Template
0.65, y: +1.71 ø9/32” ø9/32” MIDRANGE TONE OCTAVE x: -0.85, y: +0.66 x: 0, y: +0.66 x: +0.85, y: +0.66 ø1/4” ø9/32” ø1/4” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” VULCAN OCTAVE FUZZ... -
Page 9: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B VULCAN OCTAVE FUZZ... -
Page 10: Wiring Diagram
GND +V +V JACK GND JACK GND GND PCB 125B Shown with optional 9V battery. If battery is omitted, both jacks can be mono rather than one being stereo. Leave the far-right lug of the DC jack unconnected. VULCAN OCTAVE FUZZ... -
Page 11: Document Revisions
The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.1.0 (2020-06-06) Updated PCB layout. Added two resistors. Added additional tracing notes based on 1.0.1 (2019-08-21) Removed RPD from parts list, mistakenly copied from another project. 1.0.0 (2019-02-01) Initial release. VULCAN OCTAVE FUZZ...
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