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-   -   (LT)spice model for 6J7 (http://www.diyaudio.com/forums/software-tools/225746-lt-spice-model-6j7.html)

JoeAlders 15th December 2012 01:33 PM

(LT)spice model for 6J7
 
Hello,
Is there somebody who can supply me with a (LT)spice model of the pentode 6J7,
or where can I find a description on the internet? Browsing on the net myself did not give me any clue (for instance Duncan's pages or others).
Or, is it possible to modify an existing pentode model to get a workable model?
Thanks in advance,
Joe.

cogsncogs 19th December 2012 07:34 AM

To use this model in LTSpice change all instances of ^ to **.
Code:

*
* Generic pentode model: 6J7
* Copyright 2003--2006 by Ayumi Nakabayashi, All rights reserved.
* Version 3.01, Generated on Wed Mar 22 17:20:43 2006
.SUBCKT 6J7 A G2 G1 K
BGG  GG  0 V=V(G1,K)+0.75953915
BEP  EP  0 V=URAMP(V(A,K))+1e-10
BEG  EG  0 V=URAMP(V(G1,K))+1e-10
BEG2  EG2  0 V=URAMP(V(G2,K))+1e-10
BM1  M1  0 V=(0.0057490544*(URAMP(V(EG2)-1e-10)+1e-10))^-0.20145614
BM2  M2  0 V=(0.88159781*(URAMP(V(GG)+V(EG2)/20.595073)+1e-10))^1.7014561
BP    P    0 V=0.00080605414*(URAMP(V(GG)+V(EG2)/23.361076)+1e-10)^1.5
BIK  IK  0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.00053791349*V(M1)*V(M2)
BIG  IG  0 V=0.00040302707*V(EG)^1.5*(V(EG)/(V(EP)+V(EG))*1.2+0.4)
BIK2  IK2  0 V=V(IK,IG)*(1-0.4*(EXP(-V(EP)/V(EG2)*15)-EXP(-15)))
BIG2T IG2T 0 V=V(IK2)*(0.82254609*(1-V(EP)/(V(EP)+10))^1.5+0.17745391)
BIK3  IK3  0 V=V(IK2)*(V(EP)+7400)/(V(EG2)+7400)
BIK4  IK4  0 V=V(IK3)-URAMP(V(IK3)-(0.00045533328*(V(EP)+URAMP(V(EG2,EP)))^1.5))
BIP  IP  0 V=URAMP(V(IK4,IG2T)-URAMP(V(IK4,IG2T)-(0.00045533328*V(EP)^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  0.005p
CGK  G1  K  4.2p
C12  G1  G2 2.8p
CAK  A  K  12p
.ENDS


JoeAlders 19th December 2012 07:51 AM

Thank you very much cogsncogs!

At first I was afraid that nobody could help me in this matter
due to a lack of response.
Thanks again!
Joe.


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