* Apparently the uPA68H is an equivalent of the 2SK129. The following model is generated from the uPA68H data sheet.
.MODEL 2SK129 NJF( Beta=12.0m Rd=1 Rs=1 Is=10f Lambda=2.25m Vto=-0.7 Cgd=15.0p Cgs=3.0p )
* The following is based on the SPICE model for the 2N3819 N-JFET
*.MODEL 2SK129 NJF( Beta=1.304m Rd=1 Rs=1 Lambda=2.25m Vto=-3 Is=33.57f Cgd=1.6p Pb=1 Fc=0.5 Cgs=2.414p Kf=9.882E-18 Af=1 )