aion Obsidian Manual - Página 6

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BUILD NOTES

Using SMD JFETs

The 2SK117-GR JFET is no longer available 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 surface-mount

devices 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.

Using through-hole adapters

If you're not confident in your ability to work with surface-mount parts, Aion FX offers

2SK209-GR

JFETs

(the SMD version of 2SK117-GR and 2SK184-GR) that come pre-soldered to adapters for use

in through-hole designs. These are from the same manufacturer as the ones used in the original BOSS

pedals and will perform identically.

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