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Vacuum Tube SPICE Models
Vacuum Tube SPICE Models
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Old 2nd December 2014, 12:23 AM   #601
RajkoM is offline RajkoM  Bosnia and Herzegovina
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...second data should be:

105V / -1,8V / 20mA

my typo, sorry.
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Old 2nd December 2014, 06:26 AM   #602
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
Quote:
Originally Posted by RajkoM View Post
Proposed 6P9P model is good for me. Quick check tells:
230V/-6V/44mA, and
145V/-1,8V/20mA.

Jazbo, typo is in "info part" of first line. Should be ..... P K G2 G.
But this typo does not affect the directive.
I must have changed the symbol names by mistake, because the model did not work for me as is... let me check it out and get back to you.
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Old 2nd December 2014, 06:57 AM   #603
artosalo is offline artosalo  Finland
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Quote:
Originally Posted by RajkoM View Post
Proposed 6P9P model is good for me...
Could you share that 6P9P model ?
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Old 2nd December 2014, 08:21 AM   #604
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
Quote:
Originally Posted by RajkoM View Post
...second data should be:

105V / -1,8V / 20mA

my typo, sorry.
Could you please upload the complete .ASC and .SYM files for the 6P9 test circuit, I had to re-install LTSpice and lost all my old files...
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Old 2nd December 2014, 09:51 AM   #605
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
Quote:
Originally Posted by artosalo View Post
Yes, thanks again. This seems to be the triode model of the pentode only, but the pentode side seems to be very similar to 6GV8 and this model I already have.
You can also try the ECL85P model from the Ayumi library, it should be pretty close to the 6F5P.

Last edited by jazbo8; 2nd December 2014 at 09:53 AM.
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Old 2nd December 2014, 12:23 PM   #606
RajkoM is offline RajkoM  Bosnia and Herzegovina
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This is a circuit where I quickly tested model from post 592.
Symbol model is tetrode model from Misc folder and LT spice.
Attached Images
File Type: jpg 6P9_pent.jpg (62.0 KB, 166 views)
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Old 2nd December 2014, 02:43 PM   #607
jazbo8 is offline jazbo8
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Quote:
Originally Posted by RajkoM View Post
This is a circuit where I quickly tested model from post 592.
Symbol model is tetrode model from Misc folder and LT spice.
Thanks, I finally got the model to work but I am getting the same results as artosalo... Did you use the same curve data as shown in the picture below?

Quote:
Originally Posted by artosalo View Post
1. Ua = 102 V, Ug1 = 0 : Ia = 40 mA
2. Ua = 171 V, Ug1 = -3 : Ia = 38 mA
3. Ua = 242 V, Ug1 = -6 : Ia = 38 mA

So my results show too low anode currents.
6P9 Triode-Connected vs. the datasheet:
Click the image to open in full size.
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Old 2nd December 2014, 04:18 PM   #608
RajkoM is offline RajkoM  Bosnia and Herzegovina
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Yes. I just checked.
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File Type: jpg 6P9_T curves.jpg (52.0 KB, 124 views)
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Old 3rd December 2014, 10:21 AM   #609
nl3prc is offline nl3prc  Netherlands
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Quote:
Originally Posted by jazbo8 View Post
The model i downloaded is not workin with my tetrode.asy looks like some pins are switched around
Attached Files
File Type: zip GU50.ZIP (2.5 KB, 19 views)

Last edited by nl3prc; 3rd December 2014 at 10:27 AM.
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Old 3rd December 2014, 10:35 AM   #610
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
Ayumi models always assign the pin numbers from the top to the botton of the tube, e.g., GU50PP A S G K. So just make sure whichever symbol that you use, assigns the pins in the same order. But this particular model was originally intended for TINA, so I don't think it would work in LTSpice at all... try this one instead:
Code:
*
* Generic pentode model: GU50_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Sat Jan 11 08:13:44 2014
*               Plate
*               | Screen Grid
*               | |  Control Grid
*               | |  |  Cathode
*               | |  |  |
.SUBCKT GU50_AN A G2 G1 K
BGG   GG   0 V=V(G1,K)+0.45288699
BM1   M1   0 V=(0.10715305*(URAMP(V(G2,K))+1e-10))^-1.1401545
BM2   M2   0 V=(0.56814856*(URAMP(V(GG)+URAMP(V(G2,K))/4.0302301)))^2.6401545
BP    P    0 V=0.0015719333*(URAMP(V(GG)+URAMP(V(G2,K))/7.0936201))^1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0011497682*V(M1)*V(M2)
BIG   IG   0 V=0.00078596663*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)*(0.916000233*(1-URAMP(V(A,K))/(URAMP(V(A,K))+10))^1.5+0.083999767)
BIK3  IK3  0 V=V(IK2)*(URAMP(V(A,K))+2101.25)/(URAMP(V(G2,K))+2101.25)
BIK4  IK4  0 V=V(IK3)-URAMP(V(IK3)-(0.0011298169*(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)-(0.0011298169*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  0.1p
CGK   G1  K  8.4p
C12   G1  G2 5.6p
CAK   A   K  9.2p
.ENDS

Last edited by jazbo8; 3rd December 2014 at 10:47 AM.
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