Aion Electronics HALO Manual
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Aion Electronics HALO Manual

Distortion/sustainer
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PROJECT NAME
HALO
BASED ON
Electro-Harmonix Big Muff Pi
EFFECT TYPE
Distortion / Sustainer, Fuzz
PROJECT SUMMARY
One of the most classic guitar effects of all time, its sound falls somewhere between a distortion effect
and a fuzz with an incredibly long sustain.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
HALO DISTORTION/SUSTAINER
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.0 (2018-07-04)
1

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Summary of Contents for Aion Electronics HALO

  • Page 1 One of the most classic guitar effects of all time, its sound falls somewhere between a distortion effect and a fuzz with an incredibly long sustain. Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). HALO DISTORTION/SUSTAINER...

  • Page 2: Table Of Contents

    10 Document Revisions INTRODUCTION The Halo Distortion/Sustainer is a recreation of the Electro-Harmonix Big Muff Pi, first released in 1969. Originally marketed as a “harmonic distortion sustain”, it has been lumped together with fuzz effects, although it’s a very different animal than classic fuzz effects like a Fuzz Face or a Tone Bender.

  • Page 3: Parts List

    Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W Metal film resistor, 1/4W LEDR Metal film resistor, 1/4W 100n Film capacitor, 7.2 x 2.5mm 470pF MLCC capacitor, NP0/C0G 100n Film capacitor, 7.2 x 2.5mm HALO 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. HALO DISTORTION/SUSTAINER...

  • Page 5: Build Notes

    As a result, the new version of the Halo has been changed so that it has a 3-way switch that goes between the stock setting (scooped mids), a mid hump, or a fully flat frequency response. (The tone control still pans between a bass cut and a treble cut, only the midrange is affected.)

  • Page 6: Schematic

    SCHEMATIC HALO DISTORTION/SUSTAINER...

  • Page 7: Drill Template

    ø1/2” VOLUME SUSTAIN x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” MIDS TONE x: -0.85, y: +0.66 x: 0, y: +0.66 ø1/4” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.20 x: 0, y: -1.20 ø5/16” ø15/32” HALO DISTORTION/SUSTAINER...

  • Page 8: Enclosure Layout

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

  • Page 9: 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. HALO DISTORTION/SUSTAINER...

  • Page 10: 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 (2018-07-04) Initial release. HALO DISTORTION/SUSTAINER...

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