aion HALO DELUXE Manual
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aion HALO DELUXE Manual

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PROJECT NAME
HALO DELUXE
BASED ON
Cornish P-1
EFFECT TYPE
Distortion / sustainer, fuzz
PROJECT SUMMARY
An adaptation of David Gilmour's favorite Ram's Head Big Muff with added transistor buffers for lower
noise and cleaner switching.
Actual size is 2.3" x 2.43" (main board) and 2.3" x 0.91" (bypass board).
HALO DELUXE DISTORTION/SUSTAINER
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2024-04-19)
1

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  • Page 1 1.0.0 (2024-04-19) PROJECT SUMMARY An adaptation of David Gilmour’s favorite Ram’s Head Big Muff with added transistor buffers for lower noise and cleaner switching. Actual size is 2.3” x 2.43” (main board) and 2.3” x 0.91” (bypass board). HALO DELUXE DISTORTION/SUSTAINER...

  • Page 2: Table Of Contents

    12 Document Revisions INTRODUCTION The Halo Deluxe Distortion/Sustainer is based on the Cornish P-1, an adaptation of the EHX Big Muff Pi V2 (Ram’s Head) with two transistor buffers added to the front of the circuit to reduce noise and improve the signal isolation.

  • Page 3: Parts List

    Power supply filter resistor. Metal film resistor, 1/4W 120k Metal film resistor, 1/4W 120k Metal film resistor, 1/4W 200k 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 HALO DELUXE DISTORTION/SUSTAINER...
  • Page 4 Film capacitor, 7.2 x 2.5mm 2.2uF Electrolytic capacitor, 4mm Film capacitor, 7.2 x 2.5mm 10uF Electrolytic capacitor, 5mm P-1 only. Omit for any other Big Muff version. Film capacitor, 7.2 x 3.5mm 220uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. HALO DELUXE DISTORTION/SUSTAINER...
  • Page 5 Switchcraft 111X or equivalent. 1/4" mono 1/4" phone jack, closed frame Switchcraft 111X or equivalent. 2.1mm DC jack, 2.1mm panel mount Mouser 163-4302-E or equivalent. 3PDT Stomp switch, 3PDT 125B Enclosure, die-cast aluminum Can also use a Hammond 1590N1. HALO DELUXE DISTORTION/SUSTAINER...

  • Page 6: Build Notes

    Big Muff Versions spreadsheet compiles all of the Kit Rae schematics into one reference so that you can easily retrieve a list of values for a particular variant and build the Halo Deluxe to those specifications. Note that for all versions, the transistors, diodes and potentiometers are the same, so only the resistor and capacitor values are provided.
  • Page 7 • C16 should always be the same value as C11 • C17 should always be the same value as C10 Hardwiring the midrange switch If you’d like to leave off the midrange switch and hardwire it in the stock mid-scoop position, install wire jumpers as follows: HALO DELUXE DISTORTION/SUSTAINER...
  • Page 8 470k FX GND BC549C Mid switch: 1 (A1-2, B1-2): Stock (Mid Scoop) 2 (A2-3, B1-2): Flat Mids 3 (A2-3, B2-3): Mid Hump MIDRANGE A 1N914 1N914 1N914 1N914 BC549C 470pF 470pF EFFECT OUT 470k 470k BC549C BC549C HALO DELUXE DISTORTION/SUSTAINER...

  • Page 9: Drill Template

    VOLUME SUSTAIN x: -0.65, y: +1.71 x: 0.65, y: +1.71 ø9/32” ø9/32” TONE MIDRANGE x: -0.85, y: +0.66 x: 0, y: +0.66 ø1/4” ø9/32” CENTER (0,0) FOOTSWITCH x: -0.775, y: -1.775 x: 0, y: -1.775 ø5/16” ø15/32” HALO DELUXE DISTORTION/SUSTAINER...

  • Page 10: Enclosure Layout

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

  • Page 11: Wiring Diagram

    WIRING DIAGRAM F.GND GND BUF FX +V JACK GND JACK GND BUF 125B HALO DELUXE DISTORTION/SUSTAINER...

  • Page 12: 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 (2024-04-19) Initial release. HALO DELUXE DISTORTION/SUSTAINER...

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