aion GAIA MK.II Manual - Halaman 5

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BUILD NOTES

Using SMD JFETs

The MPF4393 JFET is no longer available from the original manufacturer in through-hole format.

This PCB uses a hybrid through-hole/SMD outline for each JFET. An extra "G" (gate) pad is included to

accommodate the MMBF4393 surface-mount version without the need for adapters.

SMD JFETs should be oriented as follows:

All surface-mount JFETs use the same pinout, so this configuration will fit any type that we're aware

of. However, always check the datasheet if you're uncertain—they're difficult to desolder if you make a

mistake.

MPF4393s from Aion FX

We have a large quantity of

through-hole MPF4393

and should be able to provide them in hobbyist

quantities for the foreseeable future. They are available in sets of 5. They are manufactured by ON

Semiconductor, the same as those used in the original Catalinbread pedal. They test in the same range

and will perform identically.

GAIA PREAMP DRIVE MK. II