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Multisim Vacumn Tube Models

Multisim Student Edition 10.1 does not appear to have all of the tube models that are in other versions.  Is there a way to get those models?
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Message 1 of 7
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michael_nipomo

 

Unfortunately due to licensing and pricing constraints the student edition has a limited set of components, models and capabilities, so this is what you are seeing: 

http://zone.ni.com/devzone/cda/tut/p/id/5630

 

However you can create your own SPICE models from the student edition:

http://forums.ni.com/ni/board/message?board.id=370&message.id=5993

 

Here are some external references for vacuum tube spice models:

http://tdsl.duncanamps.com/dcigna/tubes/spice/index.html

 

Hopefully this will get you going.

 

Patrick Noonan
Business Development Manager
National Instruments - Electronics Workbench Group
50 Market St 1-A
South Portland, ME 04106
Phone: 207 892-9130
Email: patrick.noonan@ni.com 

Message 2 of 7
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Hi,

I´m trying to simulate a Marshall amp and I`ve already downloaded some of the vacuum tube models from duncanamps' web... but I still have a problem. It happens that valve files have the .INC extension and I don't know how to include them in the multisim library.

 

Could anyone help me?

Thanks.

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Oh, it doesn't matter what format the file is as long as you can open the file in text and it's in the SPICE style.

A step by step instruction on creating your customized components can be found at:

https://decibel.ni.com/content/groups/circuit/blog/2011/05/24/create-a-component-part-2-using-the-mo...

 

Thanks,

 

 

Derek Z.
National Instruments
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Thank you very much. It was really usefull!

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I've been trying to migrate a simple EF86 model from the Spice files referenced at duncanamps.com to multisim for several years, on and off, without success. It's misleading to reference those spice files since the syntax is different from that used by Multisim, and there's no reference I could find (short of reading hundreds of pages of documentation for each system) that gives a straightforward procedure for translation.  

 

This is my latest attempt (unsuccessful):

 

.SUBCKT EF86 A S G K

*
* Calculate reduction in mu when Vg < -3V
*
Emu mu 0 value=limit{V(G,K),-limit{V(G,K)+3,-999,0}*0.714}
*
* Calculate contribution to cathode current
*
Eat at 0 value={0.636*atan(V(A,K)/15)}
Egs gs 0 value={limit{V(S,K)/27.5+V(mu)*1.32+1,0,1E6}}
Egs2 gs2 0 value={pwrs(V(gs),1.5)}
Ecath cc 0 value={V(gs2)*V(at)}
*
* Calculate anode current
*
Ga A K value={5.83E-4*V(cc)}
*
* Calculate screen current
*
Escrn sc 0 value={V(gs2)*(1.1-V(at))}
Gs S K value={0.5E-3*V(sc)}
*
* Capacitances
*
Cg1 G K 3.8p
Cak A K 5.3p
Cg1a G A 0.05p

.ENDS EF86
============= Model template =================
x%p %tA %tG2 %tG1 %tK_G3 %m

 

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Message 6 of 7
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Hello jbefumo

 

Thanks for your posting. We would like you post in a new forum. Feel free to create a new one.

 

Regards

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Message 7 of 7
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