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Vacuum Tube SPICE Models
Vacuum Tube SPICE Models
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Old 25th February 2016, 09:31 AM   #1101
ballpencil is offline ballpencil  Indonesia
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Pardon my ignorance but how do we get the LTSpice code from the Weaver model above?
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Old 25th February 2016, 12:35 PM   #1102
jackinnj is offline jackinnj  United States
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Vacuum Tube SPICE Models
See post 1090 -- the LTSpice syntax is a bit different from MSIM -- you need curly brackets.

I used these parameters:
KG1=0.00230261 kp1=-6.471 kp2=31.77 kp3=-5.93e-6 kp4=0.1736 kt1=50 kt2=0.08 kc1=6.721e-4 kc2=7.588e-2 kc3=1.708 ks1=3.462e-6 ks2=3.451e-4 ks3=-1.169e-2 kcs=0.09196 ecref=0 esref=250

I don't have any screen current data for the tube.
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Old 26th February 2016, 06:06 AM   #1103
karsten21 is offline karsten21  Germany
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Default 6F1P Spice Model

Hello,

Using utracer from Ronald and extractModel from Derk Reefman I was able to create two models for the russian 6F1P tube.
Itīs a small signal Pentode which include also a Triode.

Have fun!

Best regards
Karsten
Attached Files
File Type: txt 6F1P-Spice.txt (2.7 KB, 39 views)
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Old 2nd March 2016, 04:53 PM   #1104
jackinnj is offline jackinnj  United States
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Vacuum Tube SPICE Models
Rethinking this -- specify IG2 as a function of Vak/Vg2 and Vg1. A little less "phenomenological"

I could use more data for Vg1→ 0
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File Type: png Tetrodes_Eurequa.png (105.1 KB, 248 views)
File Type: png 6V6_ScreenTransfer.png (34.9 KB, 248 views)
File Type: png 6V6GT Screen2.png (44.2 KB, 244 views)
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Old 3rd March 2016, 08:47 PM   #1105
jim86174 is offline jim86174  United States
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I am looking for a quality schematic using 2 6l6 pp.with 2 12ax7 drivers. Any help would make me very happy.
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Old 8th March 2016, 10:53 PM   #1106
famousmockingbird is offline famousmockingbird  United States
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Hey Gang, does anyone have a 6N7 model they would like to post for me?

I have been using one section of an ECC33 in LTSpice to model the two sections of a 6N7 in parallel, it's the closest thing I have but I would like a real model of a 6N7 before I rip my amp apart.

I want to thank Thomas from Vinylsavor blog for giving me the idea of trying a 6N7 to drive my 6HJ5 amp. I plan to current source the plate @10mA and use a blue LED on the cathode.

Thanks,

-bird
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Old 9th March 2016, 02:19 AM   #1107
needtubes is offline needtubes  United States
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Quote:
Hey Gang, does anyone have a 6N7 model they would like to post for me?
I found the model below among my models, but cannot guarantee accuracy.

Code:
.SUBCKT TRIODE_6N7 1 2 3 ; Plate Grid Cathode
+ PARAMS: CCG=3.6P  CGP=2.6P CCP=4.6P RGI=2000
+ MU=37 KG1=1680 KP=340 KVB=396 VCT=3.906E-5 EX=1.32 
E1 7 0 VALUE={V(1,3)/KP*LOG(1+EXP(KP*(1/MU+(VCT+V(2,3))/SQRT(KVB+V(1,3)*V(1,3)))))} 
RE1 7 0 1G  ; TO AVOID FLOATING NODES
G1 1 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))/KG1} 
RCP 1 3 1G   ; TO AVOID FLOATING NODES
C1 2 3 {CCG} ; CATHODE-GRID 
C2 2 1 {CGP} ; GRID=PLATE 
C3 1 3 {CCP} ; CATHODE-PLATE 
D3 5 3 DX ; POSITIVE GRID CURRENT 
R1 2 5 {RGI} ; POSITIVE GRID CURRENT 
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N) 
.ENDS
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Old 9th March 2016, 03:00 PM   #1108
famousmockingbird is offline famousmockingbird  United States
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Thank you needtubes, i will run it in LTSpice and see how it works out.
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Old 9th March 2016, 05:52 PM   #1109
jazbo8 is offline jazbo8
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Vacuum Tube SPICE Models
Is it accurate enough? You be the judge...

The above 6N7 SPICE model vs. the GE datasheet:
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Old 9th March 2016, 06:16 PM   #1110
famousmockingbird is offline famousmockingbird  United States
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Looks accurate enough to me but I can't seem to get it to work in LTSpice correctly. I mean I don't get any errors but I am getting weird readings like the same voltage at the cathode is appearing on the grid in a simple common cathode gain stage. The model looks different then the ones I am use to so maybe I need to change something in the txt file?
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