*
*
* Generic pentode model: GU50
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Thu Dec 23 17:30:30 2014
*               Plate
*               | Screen Grid
*               | |  Control Grid
*               | |  |  Cathode
*               | |  |  |
.SUBCKT GU50 A G2 G1 K
BGG   GG   0 V=V(G1,K)+1
BM1   M1   0 V=(0.10436355*(URAMP(V(G2,K))+1e-10))**-0.94152046
BM2   M2   0 V=(0.61437126*(URAMP(V(GG)+URAMP(V(G2,K))/3.6950521)))**2.4415205
BP    P    0 V=0.0013346082*(URAMP(V(GG)+URAMP(V(G2,K))/6.0143635))**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.00086083603*V(M1)*V(M2)
BIG   IG   0 V=0.000667**408*URAMP(V(G1,K))**1.5*(URAMP(V(G1,K))/(URAMP(V(A,K))+URAMP(V(G1,K)))*1.2+0.4)
BIK2  IK2  0 V=V(IK,IG)*(1-0.4*(EXP(-URAMP(V(A,K))/URAMP(V(G2,K))*15)-EXP(-15)))
BIG2T IG2T 0 V=V(IK2)*(0.952380952*(1-URAMP(V(A,K))/(URAMP(V(A,K))+10))**1.5+0.047619048)
BIK3  IK3  0 V=V(IK2)*(URAMP(V(A,K))+11100)/(URAMP(V(G2,K))+11100)
BIK4  IK4  0 V=V(IK3)-URAMP(V(IK3)-(0.0010136338*(URAMP(V(A,K))+URAMP(URAMP(V(G2,K))-URAMP(V(A,K))))**1.5))
BIP   IP   0 V=URAMP(V(IK4,IG2T)-URAMP(V(IK4,IG2T)-(0.0010136338*URAMP(V(A,K))**1.5)))
BIAK  A    K I=V(IP)+1e-10*V(A,K)
BIG2  G2   K I=URAMP(V(IK4,IP))
BIGK  G1   K I=V(IG)
* CAPS
CGA   G1  A  0.1p
CGK   G1  K  8.4p
C12   G1  G2 5.6p
CAK   A   K  9.2p
.ENDS