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PROJECT NAME
EQUINOX
BASED ON
Marshall Guv'nor (Drivemaster)
EFFECT TYPE
Amp-Like Overdrive
PROJECT SUMMARY
A great low-to-mid-gain amp-like overdrive with a 3-band EQ.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
EQUINOX AMP OVERDRIVE
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.2(2021-04-27)
1
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Table of Contents
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Summary of Contents for Aion Electronics EQUINOX
- Page 1 BUILD DIFFICULTY Marshall Guv’nor (Drivemaster) Easy EFFECT TYPE DOCUMENT VERSION Amp-Like Overdrive 1.0.2(2021-04-27) PROJECT SUMMARY A great low-to-mid-gain amp-like overdrive with a 3-band EQ. Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). EQUINOX AMP OVERDRIVE...
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Page 2: Table Of Contents
The Equinox is faithful to the original, but with one added modification: a switch that lets you go between different clipping diodes. The original has a high clipping threshold using LEDs, but with the clipping switch you can also select two 1N914s in each direction, as in the Bluesbreaker, or one 1N914 in each direction, as in the Shredmaster. -
Page 3: Parts List
Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm 470pF MLCC capacitor, NP0/C0G 100uF Electrolytic capacitor, 6.3mm Power supply filter capacitor. 47uF Electrolytic capacitor, 5mm Reference voltage filter capacitor. 100n MLCC capacitor, X7R Power supply filter capacitor. EQUINOX AMP OVERDRIVE... - 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. EQUINOX AMP OVERDRIVE...
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Page 5: Build Notes
& passive tone stack like the Shredmaster, the diodes will directly affect the maximum volume of the unit. Using the diodes with the lowest threshold (one 1N914 in each direction), you’ll find that you have to crank the volume knob pretty high to get unity. EQUINOX AMP OVERDRIVE... -
Page 6: Schematic
SCHEMATIC 1N5817 100uF 10uF 100n GND GND GAIN 220pF 100kB 100n 680k 100pF TL072P TL072P IC1A 220n IC1B 470pF 100n GND GND EQUINOX AMP OVERDRIVE... -
Page 7: Drill Template
+0.775, y: +1.71 ø9/32” ø9/32” ø9/32” VOLUME CLIP GAIN 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” EQUINOX AMP OVERDRIVE... -
Page 8: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B EQUINOX AMP OVERDRIVE... -
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. EQUINOX AMP OVERDRIVE... -
Page 10: Document Revisions
DOCUMENT REVISIONS 1.0.2 (2021-04-27) Changed Treble pot to 10kB (previously 10kA) based on review of an original Drivemaster. 1.0.1 (2019-07-28) Corrected minor errors in PDF parts list. The spreadsheet & schematic were correct. 1.0.0 (2018-12-15) Initial release. EQUINOX AMP OVERDRIVE...
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