aion OSIRIS Manual
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aion OSIRIS Manual

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PROJECT NAME
OSIRIS
BASED ON
Black Arts Toneworks Pharaoh
EFFECT TYPE
Distortion / Sustainer, Fuzz
PROJECT SUMMARY
Based on the classic Big Muff circuit, this pedal adds a high/low impedance switch, a diode selector
switch, and a high-end control inside the tone stack.
Actual size is 2.3" x 1.86" (main board) and 1.79" x 0.86" (bypass board).
OSIRIS DISTORTION/SUSTAINER
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.0 (2019-03-14)
1

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Summary of Contents for aion OSIRIS

  • Page 1 Based on the classic Big Muff circuit, this pedal adds a high/low impedance switch, a diode selector switch, and a high-end control inside the tone stack. Actual size is 2.3” x 1.86” (main board) and 1.79” x 0.86” (bypass board). OSIRIS DISTORTION/SUSTAINER...

  • Page 2: Table Of Contents

    6 Drill Template INTRODUCTION The Osiris Distortion/Sustainer is adapted from the Black Arts Toneworks Pharaoh Fuzz, a Big Muff- based circuit with a few modifications. First, an input impedance switch has been added to the front of the circuit. By reducing the signal level before the boost and clipping stages, you can match it to high-output instruments or earlier pedals in the chain, or just reduce the overall signal level for more headroom and less clipping.

  • Page 3: Parts List

    LEDR Metal film resistor, 1/4W LED current-limiting resistor. Adjust value to change LED brightness. Film capacitor, 7.2 x 3.5mm 470pF MLCC capacitor, NP0/C0G 470n Film capacitor, 7.2 x 3mm Film capacitor, 7.2 x 2.5mm 470pF MLCC capacitor, NP0/C0G OSIRIS DISTORTION/SUSTAINER...
  • 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. OSIRIS DISTORTION/SUSTAINER...

  • Page 5: Schematic

    SCHEMATIC 1N5817 100uF 100n SI-GE 1N914 1N914 1N914 1N914 470pF 2N5089 470pF 470pF 470k 470k 470k 25kB HIGH MPSA18 2N5089 2N5089 HI-LO 390k OSIRIS DISTORTION/SUSTAINER...

  • Page 6: Drill Template

    SI-GE ø9/32” x: 0, y: +1.06 ø1/4” VOLUME HI-LO FUZZ x: -0.775, y: +0.41 x: +0.775, y: +0.41 x: 0, y: +0.41 ø9/32” ø9/32” ø1/4” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” OSIRIS DISTORTION/SUSTAINER...

  • Page 7: Enclosure Layout

    ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B OSIRIS DISTORTION/SUSTAINER...

  • Page 8: 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. OSIRIS DISTORTION/SUSTAINER...

  • Page 9: Document Revisions

    (In other words: you don’t have to go out of your way to advertise the fact that you use these PCBs, but please don’t go out of your way to hide it. The guitar effects industry needs more transparency, not less!) DOCUMENT REVISIONS 1.0.0 (2019-03-14) Initial release. OSIRIS DISTORTION/SUSTAINER...

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