11-30-2009 03:45 PM
12-03-2009 08:21 AM
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
03-05-2012 04:13 PM
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.
03-06-2012 01:31 PM
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:
Thanks,
03-07-2012 05:56 AM
Thank you very much. It was really usefull!
03-15-2017 11:49 AM
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
03-16-2017 02:20 PM
Hello jbefumo
Thanks for your posting. We would like you post in a new forum. Feel free to create a new one.
Regards