BF245: https://www.onsemi.com/pdf/datasheet/bf245a-d.pdf
2N5457 / 2N5458: https://www.onsemi.com/pdf/datasheet/2n5457-d.pdf
MPF102: https://www.onsemi.com/pdf/datasheet/mpf102-d.pdf
BF244: https://www.mouser.com/datasheet/2/149/bf244b-293637.pdf
BF256: https://www.mouser.com/datasheet/2/149/bf256b-292516.pdf?
2N3819: https://www.mouser.com/datasheet/2/68/2n3819-31474.pdf
2N4416: http://www.farnell.com/datasheets/39775.pdf