What do I use for the 2N4859 (KE4859) found in Electronotes schematics? The 2N4856 doesn't seem much easier to find. What JFET's replace these? The following appear to be readily available (Mouser, Digi-Key, etc.) JFET's but may have the wrong spec's: 2N3819 2N3823 2N4391 2N4392 2N5434 2N5457 2N5951 2N7000 MPF102 Steve