2SK208-GR (unmatched)

Unmatched 2SK208-GR JFETs left over from our phaser matching process. This is an exact replacement for the obsolete 2SK30A-GR, most known for use in Boss/Roland phasers but also used in the SG-1 Slow Gear and NF-1 Noise Gate.

The typical Vgs(off) value is around -1.8 to -2.2V, so it’s a great general-purpose JFET that works great for buffers and gain stages. The Vgs(off) value is slightly higher than the 2N5457 which is around -1.2V.

Please note that since they were tested for use in phasers, they may have a measured value written on the back. This is the Vgs(10k) value, not the more standard Vgs(off). It may also be blank.

Note: The drain (D) and source (S) pin labels on the adapter boards are reversed from the labels in the Toshiba datasheet. As with most JFETs, the source and drain are actually interchangeable and it does not matter which is which. The Toshiba datasheet does not specify this, but it can be confirmed using a Peak DCA75. However, cheap component testers may not show this correctly.