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    Building, troubleshooting and testing of these amplifiers should only be
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    the safety precautions around high voltages.

Vacuum Tube SPICE Models

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jazbo8

jazbo8

Ex-Moderator
Joined 2011
Just the pentode model, but you can use it with an UL OPT or VCVS to get the UL curves.

Code: 
*
* Generic pentode model: EL84_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Wed Feb 12 10:18:18 2014
*               Plate
*               | Screen Grid
*               | |  Control Grid
*               | |  |  Cathode
*               | |  |  |
.SUBCKT EL84_AN A G2 G1 K
BGG   GG   0 V=V(G1,K)+0.03372597
BM1   M1   0 V=(0.014266539*(URAMP(V(G2,K))+1e-10))**-0.43210132
BM2   M2   0 V=(0.7763568*(URAMP(V(GG)+URAMP(V(G2,K))/15.676066)))**1.9321013
BP    P    0 V=0.0040800354*(URAMP(V(GG)+URAMP(V(G2,K))/20.191832))**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0023829269*V(M1)*V(M2)
BIG   IG   0 V=0.0020400177*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)*(0.904015183*(1-URAMP(V(A,K))/(URAMP(V(A,K))+10))**1.5+0.095984817)
BIK3  IK3  0 V=V(IK2)*(URAMP(V(A,K))+2486)/(URAMP(V(G2,K))+2486)
BIK4  IK4  0 V=V(IK3)-URAMP(V(IK3)-(0.0023468355*(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)-(0.0023468355*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  0.5p
CGK   G1  K  6.6p
C12   G1  G2 4.4p
CAK   A   K  6.5p
.ENDS
 
RajkoM

RajkoM

Member
Joined 2009
Thank jazbo8.
Yes, I'm doing something with Ayumi model but the results are too good. I can not believe it :)
I'm trying to simulate a small amp. I need something for the weekend listening.
 

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jazbo8

jazbo8

Ex-Moderator
Joined 2011
mogliaa said:
The model scales up/down with different Ug2, see the other graphs at different Ug2 (i.e. model versus traced):
Ale
Click to expand...

Like you said, it could be just due to the wide sample variance... I have asked about this before, but shouldn't the traced models be re-adjusted to matched the commonly available datasheets, i.e., a "bogey" tube? Otherwise, we run the risk of having a bunch of "one-off" models, which may cause some confusion for those that aren't aware of the origins of those models. Sorry to sound like a broken record...:p
 
Last edited:
jazbo8

jazbo8

Ex-Moderator
Joined 2011
mogliaa said:
I should have aimed to find a valve that matched closer to the datasheet. I may do that and rerun in future but don't have too much time unfortunately. At least here is a model that is within the specs. I'm fine with the variance and can work with this on my simulations :)
Click to expand...
I think a built-in "fudge" factor in Extract Model would do the trick, i.e., trace any tube on hand, then bring the model in line with the datasheet "bogey" with a bit of fudging et voila, you got a well matched model...:p
 
A

akkar

Member
Joined 2010
Hello everyone!
I'm trying to use the models in Multisim, but I can't make it work...
I've created a symbol for the 6CA4/EZ81 with only one plate, because in the model there are only A and K.
The model dosn't work connecting the V source to the plate. I've tryed connecting the voltage source to the K and now it works, but I'm getting only negative halfwaves in the output.
 
jazbo8

jazbo8

Ex-Moderator
Joined 2011
Ayumi SPICE Models for 6112 & 6021

Code: 
*
* Generic triode model: 6112_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Tue Jul 29 13:01:10 2014
*               Plate
*               | Grid
*               | | Cathode
*               | | |
.SUBCKT 6112_AN A G K
BGG   GG   0 V=V(G,K)+0.2952921
BM1   M1   0 V=(0.0058468379*(URAMP(V(A,K))+1e-10))**-0.78793539
BM2   M2   0 V=(0.65561292*(URAMP(V(GG)+URAMP(V(A,K))/58.901424)+1e-10))**2.2879354
BP    P    0 V=0.0028663714*(URAMP(V(GG)+URAMP(V(A,K))/89.841768)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0017259381*V(M1)*V(M2)
BIG   IG   0 V=0.0014331857*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0014811756*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1p
CGK   G    K 1.7p
CAK   A    K 0.2p
.ENDS

Code: 
*
* Generic triode model: 6021_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Tue Apr 15 09:51:04 2014
*               Plate
*               | Grid
*               | | Cathode
*               | | |
.SUBCKT 6021_AN A G K
BGG   GG   0 V=V(G,K)+-0.0012830765
BM1   M1   0 V=(0.015313905*(URAMP(V(A,K))+1e-10))**-0.90918627
BM2   M2   0 V=(0.62261686*(URAMP(V(GG)+URAMP(V(A,K))/24.643168)+1e-10))**2.4091863
BP    P    0 V=0.003065428*(URAMP(V(GG)+URAMP(V(A,K))/39.579988)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0019444605*V(M1)*V(M2)
BIG   IG   0 V=0.001532714*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0016496182*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1.5p
CGK   G    K 2.4p
CAK   A    K 0.3p
.ENDS
 
B

bert123

Member
Joined 2014
6AN5 ltspice model

I am looking for ltspice models for a 6AN5 operating as a pentode. I have searched the net and inside some of the tube spice model collections with no luck.

There is a 6AN5T csv in the latest PCtube_1.11_win.zip (assume it is data for the tube as a triode) so maybe I just have to wait for next version.

Thanks in advance.
 
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