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PROJECT NAME
SOLSTICE
BASED ON
Marshall Shredmaster
EFFECT TYPE
Overdrive / Amp-Like Distortion
PROJECT SUMMARY
A great mid-gain amp-like distortion with a 3-band EQ. Most notably used by Jonny Greenwood of
Radiohead and Kevin Shields of My Bloody Valentine.
Actual size is 2.3" x 1.86" (main board) and 2.3" x 0.86" (bypass board).
SOLSTICE AMP DISTORTION
BUILD DIFFICULTY
Easy
DOCUMENT VERSION
1.0.0 (2018-12-15)
1
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Summary of Contents for aion Solstice
- Page 1 A great mid-gain amp-like distortion with a 3-band EQ. Most notably used by Jonny Greenwood of Radiohead and Kevin Shields of My Bloody Valentine. Actual size is 2.3” x 1.86” (main board) and 2.3” x 0.86” (bypass board). SOLSTICE AMP DISTORTION...
- Page 2 The Solstice is faithful to the original, but with one added modification: a switch that lets you go between different clipping diodes. The original has a pretty low clipping threshold with just one 1N914 diode in each direction, meaning its clipping character is more gainy and compressed.
- Page 3 47pF MLCC capacitor, NP0/C0G 100n Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm 220n Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm 220n Film capacitor, 7.2 x 2.5mm Film capacitor, 7.2 x 2.5mm SOLSTICE AMP DISTORTION...
- 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. SOLSTICE AMP DISTORTION...
- Page 5 Another common discrepancy is R1, the 47k resistor in the second-to-last op-amp stage (R8 in this project). Some schematics show this as 39k. It’s possible that some versions of the pedal used 39k there, but based on the photos in the FSB thread, it’s definitely 47k in that unit. SOLSTICE AMP DISTORTION...
- Page 6 SCHEMATIC 1N5817 100uF 47uF 100n GND GND GAIN 100kB 220n 100pF 47pF 680k TL072P TL072P 220k IC1B 100n IC1A 100k TL072P TL072P 220n 100R 100k IC2A IC2B 220n 220n CONTOUR 100kB SOLSTICE AMP DISTORTION...
- Page 7 +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” SOLSTICE AMP DISTORTION...
- Page 8 ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B SOLSTICE AMP DISTORTION...
- Page 9 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. SOLSTICE AMP DISTORTION...
- Page 10 (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 (2018-12-15) Initial release. SOLSTICE AMP DISTORTION...
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