6V6

.SUBCKT 6V6 A S G K
*
* Calculate contribution to cathode current
*
Eat     at      0       VALUE={0.636*ATAN(V(A,K)/10)}
Eme     me      0       VALUE={PWR(LIMIT{V(A,K),0,2000},1.5)/1300}
Egs     gs      0       VALUE={LIMIT{V(A,K)/600+V(S,K)/14+V(G,K)*0.65,0,1E6}}
Egs2    gs2     0       VALUE={PWRS(V(gs),1.5)*1.45E-3}
Ecath   cc      0       VALUE={LIMIT{V(gs2)*V(at),0,V(me)}}
*
* Calculate anode current
*
Ga      A       K       VALUE={V(cc)}
*
* Calculate screen current
*
Escrn   sc      0       VALUE={0.7*V(gs2)*(1.1-V(at))}
Gs      S       K       VALUE={V(sc)*LIMIT{V(S,K),0,10}/10}
*
* Grid current
*
Gg      G       K       VALUE={PWR(LIMIT{V(G,K)+1,0,1E6},1.5)*(1.25-V(at))*650E-6}
*
* Capacitances
*
Cg1     G       K       7.5p
Cak     A       K       9p
Cg1a    G       A       0.7p

.ENDS

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