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Vacuum Tube SPICE Models
Vacuum Tube SPICE Models
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Old 14th April 2018, 04:09 PM   #1661
khutch04 is offline khutch04
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Does anyone have a model for the following dual pentode compactrons or have an opinion on what single pentode models might be close enough?

6AR11
6BV11
6BN11

I'll keep looking on my own but if anyone has one, thanks!!
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Old 14th April 2018, 04:25 PM   #1662
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
Default 6BN11 SPICE Model

Code:
*
* Generic pentode model: 6BN11_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Sat Nov 01 18:19:03 2014
*                Plate
*                | Screen Grid
*                | |  Control Grid
*                | |  |  Cathode
*                | |  |  |
.SUBCKT 6BN11_AN A G2 G1 K
BGG   GG   0 V=V(G1,K)+0.80333486
BM1   M1   0 V=(0.016690499*(URAMP(V(G2,K))+1e-10))**-1.028498
BM2   M2   0 V=(0.59323756*(URAMP(V(GG)+URAMP(V(G2,K))/24.370897)))**2.528498
BP    P    0 V=0.0032099434*(URAMP(V(GG)+URAMP(V(G2,K))/41.081176))**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0021774044*V(M1)*V(M2)
BIG   IG   0 V=0.0016049717*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)*(0.75853563*(1-URAMP(V(A,K))/(URAMP(V(A,K))+10))**1.5+0.24146437)
BIK3  IK3  0 V=V(IK2)*(URAMP(V(A,K))+3175)/(URAMP(V(G2,K))+3175)
BIK4  IK4  0 V=V(IK3)-URAMP(V(IK3)-(0.001722887*(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)-(0.001722887*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  0.03p
CGK   G1  K  7.2p
C12   G1  G2 4.8p
CAK   A   K  2.8p
.ENDS
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Old 14th April 2018, 09:13 PM   #1663
khutch04 is offline khutch04
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Thanks! I get the impression that my copy of the Nakabayashi library is out of date....
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Old 15th April 2018, 06:32 AM   #1664
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
No, it’s not. I made that one.
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Old 15th April 2018, 12:24 PM   #1665
Tubelab_com is offline Tubelab_com  United States
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This old list can sometimes be helpful to figure out what's inside some of these tubes. I had a newer list somewhere, but it's gone now.

The 6AR11 is a pair of 6GM6's.
Attached Files
File Type: pdf GE Compactron List Spring 1964.pdf (116.8 KB, 21 views)
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Old 15th April 2018, 07:43 PM   #1666
khutch04 is offline khutch04
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Quote:
Originally Posted by jazbo8 View Post
No, itís not. I made that one.
Ah, the copyright applies to the process or the general form of the model then. Thanks for the effort!

I had stumbled on the GE compactron lists too but there were no models for the tubes I was interested in even when I knew what other devices they were similar too. Unless I missed them somehow.... They are not terribly useful for building traditional amplifiers with modest to high outputs but they are useful for oddball projects and NOS stock is still often quite cheap so they are tempting.
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Old 21st April 2018, 11:30 PM   #1667
poynt99 is offline poynt99  Canada
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Hi jazbo et al.

I haven't been here for a while..but been busy working on modeling/simulating stuff all the same. I'm collecting a number of popular guitar amp output tube models, and have recently converted Ayumi's models to pspice format. However, one that I have not yet come across is the 5881. I know this is supposed to be equivalent to the 6L6GB, but that is a version with lower power and max plate voltage. I've read that the 5881 does sound different than a 6L6GC, therefore it would be nice to have a spice model for the 5881.

Please set me straight if there is no benefit to a separate 5881 model, apart from the 6L6GC one, and let me know if I can help with the modeling.

Thanks!

A model for the 6973 would be nice to have as well.
Thanks!

Data sheets soon...

Here is the triode-connected curve sheet for the 5881. Unfortunately, no such curves seem available for either the 6973, nor its supposed equivalent the 6CZ5.
Attached Files
File Type: pdf 5881 Tung-Sol 3.pdf (376.1 KB, 9 views)
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Old 23rd April 2018, 02:43 PM   #1668
jelanier is offline jelanier  United States
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If you want to make your own triode models, I wrote a program to for this. It is an interactive solution that allows you to change parameters until you get a good fit for a particular triode.
The parameters follow the improved formulas outlined on the Norman Koren audio page. There are a few examples in the download. I think you can figure it out from those.

Download:

K4BPM PSPICE Home Page

Jim
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Old 24th April 2018, 01:21 PM   #1669
poynt99 is offline poynt99  Canada
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Here is a model by cogs for the 6973.
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Old 24th April 2018, 01:58 PM   #1670
poynt99 is offline poynt99  Canada
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A bit of graphics work seems to have revealed that the 5881 and 6L6GC triode-connected curves may be close enough that a 5881 model is unnecessary.

The -30V and -60V grid lines match almost perfectly, while the 0V curve is probably close enough. Only these 3 values are comparable between the two due to different grid sweeps used.
Attached Images
File Type: png 5881_6L6_compare.png (827.7 KB, 25 views)
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