* 2P3 Miniature Power Pentode Spice Model
* Author: Zabb Csaba
* Date: 25/02/2023
* The following parameters are not modelled:
*   (1) Filament and filament warmup time
*   (2) Limiting values
* 2P3 maximum ratings:
* Ua  max. 150V
* Ug2 max. 135V
* Ik  max. 25mA
* Uf  1.4V
* If  200mA
* The cathode symbol is the negative end of the filament (pin 5, parallel filament).
.SUBCKT 2P3 A S G K 
+ PARAMS: MU=5.2 KG1=5535 KP=60.06 KVB=12.96 VCT=0.274 EX=1.4 KG2=6852 KNEE=12 KVC=1.874
+ KLAMG=5.61E-4 KNEE2=21.41 KNEX=26.4  
E1  1 0  VALUE={V(S,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(S,K)*V(S,K)))*KP))}
E2  2 0  VALUE={(PWR(V(1),EX)+PWRS(V(1),EX))}
G1  A K  VALUE={IF(V(A,K)>0,V(2)/KG1*ATAN((V(A,K)+KNEX)/KNEE)*TANH(V(A,K)/KNEE2)*(1+KLAMG*V(A,K)),0)}
E3  4 K  VALUE={IF(V(A,K)>0,V(A,K),0)}
G2  S K  VALUE={V(2)/KG2*(KVC-ATAN((V(4,K)+KNEX)/KNEE)*TANH(V(4,K)/KNEE2))/(1+KLAMG*V(4,K))}
B1  G K  I=URAMP(V(G,K)+960m)^1.5*5.3E-5
G3  G K  VALUE={3.1E-5*(PWR(V(G,K),1.5)+PWRS(V(G,K),1.5))/1.5} ; G1 diode
C1  K G  4.8p  
C2  G A  0.36p
C3  K A  4.2p 
.ENDS 2P3
*