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PROJECT NAME
CYGNUS
BASED ON
Cornish G-2
EFFECT TYPE
Distortion / Sustainer, Fuzz
PROJECT SUMMARY
Based on the classic Big Muff circuit, this pedal adds a meticulously-tuned buffered bypass along with an
additional transistor-based buffer stage on the effect input.
Actual size is 2.3" x 2.43" (main board) and 2.3" x 0.87" (bypass board).
CYGNUS DISTORTION/SUSTAINER
BUILD DIFFICULTY
Intermediate
DOCUMENT VERSION
1.0.0 (2019-03-14)
1
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Summary of Contents for Aion Electronics CYGNUS
- Page 1 Based on the classic Big Muff circuit, this pedal adds a meticulously-tuned buffered bypass along with an additional transistor-based buffer stage on the effect input. Actual size is 2.3” x 2.43” (main board) and 2.3” x 0.87” (bypass board). CYGNUS DISTORTION/SUSTAINER...
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Page 2: Table Of Contents
The Cygnus is a faithful reproduction of the G-2 circuit, but with one major update: an internal switch allowing the pedal to be used in true-bypass mode instead of buffered bypass. As with the Klon KTR, the buffer mode is “almost always better”, but you can be the judge of that. -
Page 3: Parts List
Metal film resistor, 1/4W 470k Metal film resistor, 1/4W Metal film resistor, 1/4W 680R Metal film resistor, 1/4W Metal film resistor, 1/4W 100k Metal film resistor, 1/4W 470k Metal film resistor, 1/4W Metal film resistor, 1/4W 100R Metal film resistor, 1/4W CYGNUS DISTORTION/SUSTAINER... - Page 4 Film capacitor, 7.2 x 2.5mm 2.2uF Film capacitor, 7.2 x 5mm Film capacitor, 7.2 x 2.5mm 220n Film capacitor, 7.2 x 2.5mm 22uF Electrolytic capacitor, 5mm 22uF Electrolytic capacitor, 5mm 100n MLCC capacitor, X7R Power supply filter capacitor. CYGNUS 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. CYGNUS DISTORTION/SUSTAINER...
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Page 6: Build Notes
BUILD NOTES Transistor selection The original G-2 uses BC549C transistors. The pinout on the Cygnus PCB is for the U.S. “E-B-C” convention as used by the 2N3904 and 2N5088. The 2N5088 should operate identically to the BC549C, but if you do want to use the original transistors, just note that the pinout is different. Typically they would need to be rotated 180 degrees, but check the datasheet for your brand as they do vary. -
Page 7: Schematic
TO INPUT JACK 120R SW1A FX GND 220uF 100uF 220uF FROM EFFECT OUT SW1B SW1D TO OUTPUT JACK PCB IN 2N3904 BUFFER OUT 2N3904 220n 220n EFFECT OUT 2N3904 FX GND 470k 470k 470k 25kB TONE 22uF 2N3904 2N3904 2N3904 CYGNUS DISTORTION/SUSTAINER... -
Page 8: Drill Template
ø15/32” Note: On version 1 of the Cygnus, the LED is slightly misaligned from the drill template. You’ll have to bend it back so it fits the drill hole. It will be fixed in the next revision of the PCB. -
Page 9: Enclosure Layout
ENCLOSURE LAYOUT Enclosure is shown without jacks. See next page for jack layout and wiring. 125B CYGNUS DISTORTION/SUSTAINER... -
Page 10: Wiring Diagram
WIRING DIAGRAM F.GND GND BUF FX +V JACK GND JACK GND BUF 125B CYGNUS DISTORTION/SUSTAINER... -
Page 11: 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. CYGNUS DISTORTION/SUSTAINER...
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