.model 2sk170 NJF(Beta=59.86m Rs=4.151 Rd=4.151 Betatce=-.5 Lambda=1.923m + Vto=-.5024 Vtotc=-2.5m Cgd=20p M=.3805 Pb=.4746 Fc=.5 + Cgs=25.48p Isr=84.77p Nr=2 Is=8.477p N=1 Xti=3 Alpha=10u Vk=100 + Kf=111.3E-18 Af=1) .model 2sk246 NJF(Beta=1.07m Rs=56.76 Rd=56.76 Betatce=-.5 Lambda=2.8m + Vto=-2.638 Vtotc=-2.5m Cgd=10.38p M=.4373 Pb=.3905 Fc=.5 + Cgs=6.043p Isr=112.8p Nr=2 Is=11.28p N=1 Xti=3 Alpha=10u Vk=100 + Kf=1E-18 Af=1) .model 2sj74 PJF(Beta=92.12m Rs=7.748 Rd=7.748 Betatce=-.5 Lambda=4.464m + Vto=-.5428 Vtotc=-2.5m Cgd=85.67p M=.3246 Pb=.3905 Fc=.5 + Cgs=78.27p Isr=129.8p Nr=2 Is=12.98p N=1 Xti=3 Alpha=10u Vk=100 + Kf=26.64E-18 Af=1) .model 2sj103 PJF(Beta=2.197m Rs=76.76 Rd=76.76 Betatce=-.5 Lambda=735.3u + Vto=-2.037 Vtotc=-2.5m Cgd=18.95p M=.5045 Pb=.3905 Fc=.5 + Cgs=17.02p Isr=38.48f Nr=2 Is=3.848f N=1 Xti=3 Alpha=10u Vk=100 + Kf=1E-18 Af=1) .MODEL J310 NJF(Beta=3.384m Betatce=-500m Rd=1 Rs=1 Lambda=17m Vto=-3.409 Vtotc=-2.5m Is=193.9f + Isr=1.881p N=1 Nr=2 Xti=3 Alpha=7.533u Vk=74.1 Cgd=6.2p M=464.7m + Pb=1 Fc=500m Cgs=6.2p Kf=4.634e-002f Af=1) .MODEL BCP53 PNP + IS=6.1530E-14 + NF=0.9911 + ISE=1.382E-16 + NE=1.089 + BF=150.8 + IKF=1.225 + VAF=105.4 + NR=0.9965 + ISC=6.480E-15 + NC=1.022 + BR=8.074 + IKR=0.3627 + VAR=18.20 + RB=2 + IRB=1E-06 + RBM=2 + RE=5.562E-02 + RC=0.1449 + XTB=0 + EG=1.11 + XTI=3 + CJE=1.157E-10 + VJE=0.7300 + MJE=0.3751 + TF=8.666E-10 + XTF=1.231 + VTF=3.008 + ITF=0.4581 + PTF=0 + CJC=5.264E-11 + VJC=0.6591 + MJC=0.4533 + XCJC=0.4401 + TR=2.75E-07 + CJS=0 + VJS=0.75 + MJS=0.333 + FC=0.9427 .ENDS .MODEL BCP56 NPN + IS = 7.17E-014 + NF = 0.9928 + ISE = 1.113E-014 + NE = 1.443 + BF = 119 + IKF = 0.65 + VAF = 8 + NR = 0.9943 + ISC = 2.266E-014 + NC = 1.361 + BR = 35.83 + IKR = 1.8 + VAR = 81 + RB = 10.4 + IRB = 0.0011 + RBM = 2.5 + RE = 0.0864 + RC = 0.1173 + XTB = 0 + EG = 1.11 + XTI = 3 + CJE = 1.442E-010 + VJE = 0.7013 + MJE = 0.3245 + TF = 7.8E-010 + XTF = 7 + VTF = 5 + ITF = 2 + PTF = 0 + CJC = 2.052E-011 + VJC = 0.5 + MJC = 0.4015 + XCJC = 1 + TR = 2.3E-008 + CJS = 0 + VJS = 0.75 + MJS = 0.333 + FC = 0.9 .MODEL DIODE D + IS = 1.323E-014 + N = 0.9814 + BV = 1000 + IBV = 0.001 + RS = 3185 + CJO = 0 + VJ = 1 + M = 0.5 + FC = 0 + TT = 0 + EG = 1.11 + XTI = 3 .ENDS *These are some good models that I have used lately for the popular Toshiba JFETs. *2SK389 and 2SJ109 are simply dual 2SK170 and 2SJ74. *K170 and J74 models are set to an Idss of about 12mA while K246 and J103 are set *to an Idss of about 6mA. For other Idss values, adjust the model BETA parameter. *In a first approximation, BETA=Idss*Vto^2 where Vto is the threshold voltage, already defined in each model.