*****************************RCA12AX7A Spice Model "Dream" Version 3.0 (IsSpice sintax)**************************************            
*************************created by Leonardo Di Carlo on 20th January 2008************************                             
*$
.SUBCKT 12AX7A 1 2 3                                                                                                        
*              A G C                                                                                                        
+PARAMS: CCG=2.3P  CGP=2.4P CCP=.9P  D1=0.18 K1=0.95 Voff=-0.74 h=0.6 Isat=8e-3 SF=0.7
*
BE1 100 0 V=V(2,3)<-5 ? -5 : V(2,3)>=-5&V(2,3)<0 ? V(2,3) : 0
*
GG 11 0 POLY(1) (100,0) 0.001101619007573 1.512376135073021e-005 -3.155955520344564e-005 -3.286231900854539e-006
VG 12 11 0
RG 12 0 1P
*
GMU 15 0 POLY(1) (100,0) 99.704829344364796 -0.022980852114950 -0.448893261889592 -0.022265711331488
VMU 16 15 0
RMU 16 0 1P
*
BSpacefrac 17 0 I=(I(VG)*(PWR(V(2,3)+{h}+V(1,3)/I(VMU),1.5)+PWRS(V(2,3)+{h}+V(1,3)/I(VMU),1.5))/2)/{Isat}
VSpacefrac 18 17 0 
RSpacefrac 18 0 1P
*
Bspace 31 0 I=I(VSpacefrac)<{SF} ? I(VSpacefrac)*{Isat} : ({SF}+((I(VSpacefrac)-{SF})*(1-{SF}))/(1-2*{SF}+I(VSpacefrac)))*{Isat}
Vspace 32 31 0
Rspace 32 0 1P
*
Bgrid1 20 0 I=V(2,3)>={Voff} ? I(VSpace)/(1+{D1}*(V(1,3)/(V(2,3)+(-{Voff})))^{K1}) : 0
Vgrid1 21 20 0   
Rgrid1 21 0 1P                                                                    
BPlate1 22 0 I=I(Vspace)-I(Vgrid1)                                   
VPlate1 23 22 0                                                          
RPlate1 23 0 1P
*
FPlate 1 3 VPlate1 1 
FGrid 2 3 Vgrid1 1
C1 2 3 {CCG}                                                                          
C2 2 1 {CGP}                                                                          
C3 1 3 {CCP}                                                                          
.ENDS