Aion Electronics CYGNUS Manual - Página 6

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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.

Bypassing the true bypass / buffer switch

The E-Switch EG4208 slide switch used for the true bypass/buffer selector is available from Mouser

Electronics but may not be accessible to everyone. If you are unable to obtain it, you can hard-wire the

switch to either true bypass mode or buffered mode by soldering jumpers to the switch pads.

Tone modifications

Cornish pedals are legendary for their reliability and the quality of their buffered bypass systems.

However, the G-2 in particular is known for having significantly more low-end than a standard Big Muff

circuit and this can sometimes be too much in a live setting depending on the mix.

Fortunately, you can get all of the benefits of the buffered bypass while also making the rest of the

circuit a little less bass-heavy and more similar to vintage Big Muffs. Here is a set of suggested mods:

• C1: 100n → 27n

• C5: 220n → 47n

• C9: 1n → 470pF (MLCC)

• C12: 1n → 470pF (MLCC)

• C13: 220n → 100n

• C15: 1n → 470pF (MLCC)

• C16: 220n → 100n

• C19: 220n → 100n

You can also compare the main part of the circuit (C8 onward in the schematic) with your favorite Muff

variant to tailor it even more to your liking. The tone control is the only part of the circuit that departs

from the classic Big Muff topology.

CYGNUS DISTORTION/SUSTAINER