Vacuum Tube SPICE Models

Ciu · 2020-07-28 11:32 am

Hello !
I'm looking for russian pentode 6P1P, connected in triode mode
Thanks for any help

TG · 2020-07-28 11:46 am

You can use 6V6 or 6AQ5 models for 6P1P, they are pretty close electrically

Adrian Immler · 2020-07-28 4:28 pm

Ciu said:
Hello !
I'm looking for russian pentode 6P1P, connected in triode mode
Thanks for any help

Hi Ciu
See my post #2192 for the 6BW6 model, which is also very similar to your requested 6P1P model.

all the best, Adrian

Koonw · 2020-07-28 8:10 pm

Ciu said:
Hello !
I'm looking for russian pentode 6P1P, connected in triode mode
Thanks for any help

Found nice curves here:

Снятие Вах Пентодов И Тетродов - Ламповая техника - Форум по радиоэлектронике

Code:

**** 6P1P_EB ******************************************
* Created on 07/29/2020 03:01 using paint_kip.jar
* [URL="http://www.dmitrynizh.com/tubeparams_image.htm"]Model Paint Tools: Trace Tube Parameters over Plate Curves, Interactively[/URL]
* Plate Curves image file: 6p1p-eb.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 6P1P_EB P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 6P1P_EB P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=11.5 KG1=2214 KP=38.1 KVB=13.8 VCT=0.049 EX=1.414 KG2=4752.72 KNEE=7.128 KVC=1.975
+ KLAM=1.788E-14 KLAMG=4.72E-4  KD=0.616 KC=0.182 KR1=0.001144 KR2=0.05632 KVBG=0.015 KB1=2.02 KB2=1.22 KB3=0.58 KB4=0.755 KVBGI=4.15E-4 KNK=-0.07024 KNG=0.03175 KNPL=20.37 KNSL=54.53 KNPR=59.13 KNSR=51.88
+ CCG=7.5P CGP=0.7P CCP=5P VGOFF=-2.066 IGA=0.00105 IGB=0.276 IGC=6.64 IGEX=1.7
* Vp_MAX=360 Ip_MAX=140 Vg_step=5 Vg_start=0 Vg_count=12
* X_MIN=64 Y_MIN=40 X_SIZE=777 Y_SIZE=562 FSZ_X=1296 FSZ_Y=736 XYGrid=true
* Rp=1400 Vg_ac=20 P_max=12 Vg_qui=-27.5 Vp_qui=300 
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y 
* showIg1=y isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n 
* UL=0.43 EG2=250 gridLevel2=y addKink=y isTanhKnee=n advSigmoid=y 
*----------------------------------------------------------------------------------
RE1  7 0  1G    ; DUMMY SO NODE 7 HAS 2 CONNECTIONS
E1   7 0  VALUE=  ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(G2,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(G2,K)*V(G2,K)))*KP))}
RE2  6 0  1G    ; DUMMY SO NODE 6 HAS 2 CONNECTIONS
E2  6 0  VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))} ; Kg1 times KIT current
E4   8 0  VALUE={V(P,K)/KNEE/(KVBGI+V(6)*KVBG)}
E5  81 0  VALUE={PWR(V(8),KB1)}
E6  82 0  VALUE={PWR(V(8),KB2)}
E7  83 0  VALUE={PWR(V(8),KB3)}
E8   9 0  VALUE={PWR(1-EXP(-V(81)*(KC+KR1*V(82))/(KD+KR2*V(83))),KB4)*1.5708}
RE4  8 0  1
RE5 81 0  1
RE6 82 0  1
RE7 83 0  1
RE8  9 0  1
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*V(9)} ; Ip with knee but no slope and no kink
RE22 22 0 1 ; E22: kink curr deviation for plate
E22  22 0 VALUE={V(21)*LIMIT(KNK-V(G,K)*KNG,0,0.3)*(-ATAN((V(P,K)-KNPL)/KNSL)+ATAN((V(P,K)-KNPR)/KNSR))} 
G1   P K  VALUE={V(21)*(1+KLAMG*V(P,K))+KLAM*V(P,K) + V(22)}
G2   G2 K  VALUE={V(6)/KG2*(KVC-V(9))/(1+KLAMG*V(P,K)) - V(22)}
RCP  P K  1G     ; FOR CONVERGENCE
C1   K G  {CCG}  ; CATHODE-GRID 1
C2   G P  {CGP}  ; GRID 1-PLATE
C3   K P  {CCP}  ; CATHODE-PLATE
RE23 G 0 1G 
GG G K VALUE={(IGA+IGB/(IGC+V(P,K)))*(MU/KG1)*
+(PWR(V(G,K)-VGOFF,IGEX)+PWRS(V(G,K)-VGOFF,IGEX))}
.ENDS
*$

Adrian Immler · 2020-07-30 9:41 am

Hey Koonw,

I just realized that Dmitry's tool seams to cope nowadays also the second emission effect ?!
Wow, that's cool!
The last time I used this tool (some years ago), this wasn't able to mimic.

Unfortunately, Dmitry's tool is for Windows only, while I use a Mac...

Are you using a Beta Version of Dmitry's tool?

However, the number of approaches coping secondary emission effect is growing:
1) Derk Reefman's (he did the pioneer work on that topic)
2) mine approach (improvements introduced, especially more independent params)
3) and now Dmitry's.
That are good news ;-)

all the best, Adrian

Koonw · 2020-07-30 10:17 am

I just realized that Dmitry's tool seams to cope nowadays also the second emission effect ?!
Wow, that's cool!
The last time I used this tool (some years ago), this wasn't able to mimic.

Unfortunately, Dmitry's tool is for Windows only, while I use a Mac...

Are you using a Beta Version of Dmitry's tool?

Paint Tool was last updated about a year ago, but for some reasons the popup windows for some advance functions are not always popping up now I have a surer way to make it works. You need to set the display say to 125% from 150% then popup windows are visible. The Kink, Knee and Advanced Knee can cope with secondary emissions. You can first use the less advance options and step to advance options.

It should run in Mac also because it's written in Java which is system architecture independent. The version I used it downloaded from Dmitry's website not so long ago it's working so far so good. You need Java run time (JRE) to run it. There was also an earlier version which you can recompile using Javac or to modified slightly but the later version appeared scrambled in source code. I have spent few months reading the sources code, but I rather better leave it to developer.

Adrian Immler · 2020-07-30 10:32 am

It should run in Mac also because it's written in Java

good hint - I'will try to install it, and also Java.

cogsncogs · 2020-07-31 2:14 am

I run it on Linux using JRE in the terminal and it runs fine. There's no installer.

fewa · 2020-08-01 12:16 pm

Is it possible to build spice model in curvecaptor with mu, kg1, kp, kvb etc parameters?

Ciu · 2020-08-01 3:57 pm

Ciu said:
Hello !
I'm looking for russian pentode 6P1P, connected in triode mode
Thanks for any help

Thanks to all (TG, A.Immler, Koonw) !!!

kolin · 2020-08-01 4:21 pm

Hello !
I'm looking for 6AG7
Thanks for any help

Koonw · 2020-08-02 12:18 am

Here is 6ag7 and 6p9p model:

Code:

**** 6AG7_GE ******************************************
* Created on 08/02/2020 07:10 using paint_kip.jar
* [URL="http://www.dmitrynizh.com/tubeparams_image.htm"]www.dmitrynizh.com/tubeparams_image.htm[/URL]
* Plate Curves image file: 6ag7-ge.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 6AG7_GE P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 6AG7_GE P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=25.85 KG1=137.81 KP=156.39 KVB=9065.4 VCT=-2.62 EX=0.8865 KG2=72.31 KNEE=36.19 KVC=1.754
+ KLAM=2.14E-6 KLAMG=1.919E-6  KD=1.849 KC=0.07463 KR1=0.01411 KR2=0.3479 KVBG=0.05471 KB1=2.261 KB2=0.01445 KB3=0.5701 KB4=0.5486 KVBGI=4.929E-4 KNK=-0.06196 KNG=0.2364 KNPL=7.185E-12 KNSL=340.37 KNPR=76.33 KNSR=360.51
+ CCG=13P CGP=1.9P CCP=7.5P VGOFF=-1.5 IGA=4.9E-4 IGB=0.1048 IGC=31.96 IGEX=1.619
* Vp_MAX=500 Ip_MAX=200 Vg_step=2 Vg_start=8 Vg_count=15
* X_MIN=62 Y_MIN=27 X_SIZE=684 Y_SIZE=551 FSZ_X=1296 FSZ_Y=736 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=9 Vg_qui=-6 Vp_qui=300 
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y 
* showIg1=y isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n 
* UL=0.43 EG2=150 gridLevel2=y addKink=y isTanhKnee=n advSigmoid=y 
*----------------------------------------------------------------------------------
RE1  7 0  1G    ; DUMMY SO NODE 7 HAS 2 CONNECTIONS
E1   7 0  VALUE=  ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(G2,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(G2,K)*V(G2,K)))*KP))}
RE2  6 0  1G    ; DUMMY SO NODE 6 HAS 2 CONNECTIONS
E2  6 0  VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))} ; Kg1 times KIT current
E4   8 0  VALUE={V(P,K)/KNEE/(KVBGI+V(6)*KVBG)}
E5  81 0  VALUE={PWR(V(8),KB1)}
E6  82 0  VALUE={PWR(V(8),KB2)}
E7  83 0  VALUE={PWR(V(8),KB3)}
E8   9 0  VALUE={PWR(1-EXP(-V(81)*(KC+KR1*V(82))/(KD+KR2*V(83))),KB4)*1.5708}
RE4  8 0  1
RE5 81 0  1
RE6 82 0  1
RE7 83 0  1
RE8  9 0  1
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*V(9)} ; Ip with knee but no slope and no kink
RE22 22 0 1 ; E22: kink curr deviation for plate
E22  22 0 VALUE={V(21)*LIMIT(KNK-V(G,K)*KNG,0,0.3)*(-ATAN((V(P,K)-KNPL)/KNSL)+ATAN((V(P,K)-KNPR)/KNSR))} 
G1   P K  VALUE={V(21)*(1+KLAMG*V(P,K))+KLAM*V(P,K) + V(22)}
G2   G2 K  VALUE={V(6)/KG2*(KVC-V(9))/(1+KLAMG*V(P,K)) - V(22)}
RCP  P K  1G     ; FOR CONVERGENCE
C1   K G  {CCG}  ; CATHODE-GRID 1
C2   G P  {CGP}  ; GRID 1-PLATE
C3   K P  {CCP}  ; CATHODE-PLATE
RE23 G 0 1G 
GG G K VALUE={(IGA+IGB/(IGC+V(P,K)))*(MU/KG1)*
+(PWR(V(G,K)-VGOFF,IGEX)+PWRS(V(G,K)-VGOFF,IGEX))}
.ENDS
 *$

Code:

 * [URL="http://www.dmitrynizh.com/tubeparams_image.htm"]www.dmitrynizh.com/tubeparams_image.htm[/URL]
* Plate Curves image file: 6p9p-ch.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 6P9P_CH P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 6P9P_CH P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=22.87 KG1=2079.83 KP=127.64 KVB=252.13 VCT=1.267 EX=1.759 KG2=2235.34 KNEE=7.682 KVC=1.969
+ KLAM=3.662E-13 KLAMG=2.132E-4  KD=27.95 KC=1.943 KR1=3.405E-6 KR2=0.05914 KVBG=0.01222 KB1=1.515 KB2=1.378 KB3=2.8E-5 KB4=0.6572 KVBGI=2.495E-4 KNK=-0.3213 KNG=0.1234 KNPL=0.07219 KNSL=0.02209 KNPR=34.8 KNSR=59.98
+ CCG=3P CGP=1.4P CCP=1.9P VGOFF=-1.5 IGA=0.005846 IGB=2.016 IGC=108.16 IGEX=1.66
* Vp_MAX=400 Ip_MAX=80 Vg_step=3 Vg_start=0 Vg_count=22
* X_MIN=45 Y_MIN=17 X_SIZE=710 Y_SIZE=557 FSZ_X=1296 FSZ_Y=736 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=9 Vg_qui=-31.5 Vp_qui=300 
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y 
* showIg1=y isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n 
* UL=0.43 EG2=150 gridLevel2=y addKink=y isTanhKnee=n advSigmoid=y 
*----------------------------------------------------------------------------------
RE1  7 0  1G    ; DUMMY SO NODE 7 HAS 2 CONNECTIONS
E1   7 0  VALUE=  ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(G2,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(G2,K)*V(G2,K)))*KP))}
RE2  6 0  1G    ; DUMMY SO NODE 6 HAS 2 CONNECTIONS
E2  6 0  VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))} ; Kg1 times KIT current
E4   8 0  VALUE={V(P,K)/KNEE/(KVBGI+V(6)*KVBG)}
E5  81 0  VALUE={PWR(V(8),KB1)}
E6  82 0  VALUE={PWR(V(8),KB2)}
E7  83 0  VALUE={PWR(V(8),KB3)}
E8   9 0  VALUE={PWR(1-EXP(-V(81)*(KC+KR1*V(82))/(KD+KR2*V(83))),KB4)*1.5708}
RE4  8 0  1
RE5 81 0  1
RE6 82 0  1
RE7 83 0  1
RE8  9 0  1
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*V(9)} ; Ip with knee but no slope and no kink
RE22 22 0 1 ; E22: kink curr deviation for plate
E22  22 0 VALUE={V(21)*LIMIT(KNK-V(G,K)*KNG,0,0.3)*(-ATAN((V(P,K)-KNPL)/KNSL)+ATAN((V(P,K)-KNPR)/KNSR))} 
G1   P K  VALUE={V(21)*(1+KLAMG*V(P,K))+KLAM*V(P,K) + V(22)}
G2   G2 K  VALUE={V(6)/KG2*(KVC-V(9))/(1+KLAMG*V(P,K)) - V(22)}
RCP  P K  1G     ; FOR CONVERGENCE
C1   K G  {CCG}  ; CATHODE-GRID 1
C2   G P  {CGP}  ; GRID 1-PLATE
C3   K P  {CCP}  ; CATHODE-PLATE
RE23 G 0 1G 
GG G K VALUE={(IGA+IGB/(IGC+V(P,K)))*(MU/KG1)*
+(PWR(V(G,K)-VGOFF,IGEX)+PWRS(V(G,K)-VGOFF,IGEX))}
.ENDS
*$

Koonw · 2020-08-03 11:39 am

This is Russian 6Π9 model:

Code:

* [url=http://www.dmitrynizh.com/tubeparams_image.htm]Model Paint Tools: Trace Tube Parameters over Plate Curves, Interactively[/url]
* Plate Curves image file: 6p9.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 6P9 P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 6P9 P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=24.5 KG1=108.31 KP=143.79 KVB=12772.79 VCT=-3.678 EX=0.784 KG2=292.32 KNEE=23.9 KVC=1.904
+ KLAM=9.766E-12 KLAMG=8.203E-9   KNK=-0.08712 KNG=0.00672 KNPL=59.5 KNSL=12.1 KNPR=133.2 KNSR=31.9
+ CCG=13P CGP=0.6P CCP=7.5P VGOFF=-1.5 IGA=4.1E-4 IGB=0.05806 IGC=37.92 IGEX=1.607
* Vp_MAX=460 Ip_MAX=80 Vg_step=3 Vg_start=6 Vg_count=20
* X_MIN=60 Y_MIN=13 X_SIZE=718 Y_SIZE=555 FSZ_X=1296 FSZ_Y=736 XYGrid=true
* Rp=1400 Vg_ac=20 P_max=9 Vg_qui=-22.5 Vp_qui=300 
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y 
* showIg1=y isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n 
* UL=0.43 EG2=150 gridLevel2=y addKink=y isTanhKnee=n advSigmoid=n 
*----------------------------------------------------------------------------------
RE1  7 0  1G    ; DUMMY SO NODE 7 HAS 2 CONNECTIONS
E1   7 0  VALUE=  ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(G2,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(G2,K)*V(G2,K)))*KP))}
RE2  6 0  1G    ; DUMMY SO NODE 6 HAS 2 CONNECTIONS
E2  6 0  VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))} ; Kg1 times KIT current
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*ATAN(V(P,K)/KNEE)} ; Ip with knee but no slope and no kink
RE22 22 0 1 ; E22: kink curr deviation for plate
E22  22 0 VALUE={V(21)*LIMIT(KNK-V(G,K)*KNG,0,0.3)*(-ATAN((V(P,K)-KNPL)/KNSL)+ATAN((V(P,K)-KNPR)/KNSR))} 
G1   P  K  VALUE={V(21)*(1+KLAMG*V(P,K))+KLAM*V(P,K) + V(22)}
* Alexander Gurskii screen current, see audioXpress 2/2011, with slope and kink added
RE43 43 K 1G ; Dummy
E43  43 G2 VALUE={0} ; Dummy
G2   43 K  VALUE={V(6)/KG2*(KVC-ATAN(V(P,K)/KNEE))/(1+KLAMG*V(P,K))-V(22)}
RCP  P K  1G     ; FOR CONVERGENCE
C1   K G  {CCG}  ; CATHODE-GRID 1
C2   G P  {CGP}  ; GRID 1-PLATE
C3   K P  {CCP}  ; CATHODE-PLATE
RE23 G 0 1G 
GG G K VALUE={(IGA+IGB/(IGC+V(P,K)))*(MU/KG1)*
+(PWR(V(G,K)-VGOFF,IGEX)+PWRS(V(G,K)-VGOFF,IGEX))}
.ENDS
*$

deafen · 2020-08-12 10:44 pm

Long shot here - any ideas on a model for a 2E26 (aka half of an 815)?

craigtone · 2020-08-13 2:10 pm

Does anyone have a 5687 or 6900 model for TINA?

Adrian Immler · 2020-08-13 2:45 pm

I have to priorize other things, but maybe Koonw or somewhere else creates models for you.

Thanks for your understanding
all the best, Adrian

Koonw · 2020-08-13 3:39 pm

2e26 model:

Code:

**** 2E26 ******************************************
* Created on 08/13/2020 22:28 using paint_kip.jar
* [url=http://www.dmitrynizh.com/tubeparams_image.htm]Model Paint Tools: Trace Tube Parameters over Plate Curves, Interactively[/url]
* Plate Curves image file: 2e26.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 2E26 P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 2E26 P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=6.5 KG1=1605.46 KP=55.43 KVB=1630.85 VCT=0.345 EX=1.316 KG2=2552.96 KNEE=0.946 KVC=2.172
+ KLAM=6.25E-9 KLAMG=2.451E-4  KD=74.67 KC=0.003632 KR1=0.004868 KR2=0.4214 KVBG=0.01485 KB1=1.96 KB2=1.94 KB3=1.88 KB4=0.3072 KVBGI=0.00099 KNK=0.1517 KNG=0.01181 KNPL=0.06526 KNSL=0.005039 KNPR=118.51 KNSR=119.26
+ CCG=13P CGP=0.2P CCP=7P VGOFF=0 IGA=0.003943 IGB=0.2867 IGC=28.48 IGEX=1.92
* Vp_MAX=600 Ip_MAX=700 Vg_step=10 Vg_start=50 Vg_count=20
* X_MIN=38 Y_MIN=11 X_SIZE=629 Y_SIZE=545 FSZ_X=1296 FSZ_Y=736 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=10 Vg_qui=-45 Vp_qui=300 
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y 
* showIg1=y isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n 
* UL=0.43 EG2=160 gridLevel2=y addKink=y isTanhKnee=n advSigmoid=y 
*----------------------------------------------------------------------------------
RE1  7 0  1G    ; DUMMY SO NODE 7 HAS 2 CONNECTIONS
E1   7 0  VALUE=  ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(G2,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(G2,K)*V(G2,K)))*KP))}
RE2  6 0  1G    ; DUMMY SO NODE 6 HAS 2 CONNECTIONS
E2  6 0  VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))} ; Kg1 times KIT current
E4   8 0  VALUE={V(P,K)/KNEE/(KVBGI+V(6)*KVBG)}
E5  81 0  VALUE={PWR(V(8),KB1)}
E6  82 0  VALUE={PWR(V(8),KB2)}
E7  83 0  VALUE={PWR(V(8),KB3)}
E8   9 0  VALUE={PWR(1-EXP(-V(81)*(KC+KR1*V(82))/(KD+KR2*V(83))),KB4)*1.5708}
RE4  8 0  1
RE5 81 0  1
RE6 82 0  1
RE7 83 0  1
RE8  9 0  1
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*V(9)} ; Ip with knee but no slope and no kink
RE22 22 0 1 ; E22: kink curr deviation for plate
E22  22 0 VALUE={V(21)*LIMIT(KNK-V(G,K)*KNG,0,0.3)*(-ATAN((V(P,K)-KNPL)/KNSL)+ATAN((V(P,K)-KNPR)/KNSR))} 
G1   P K  VALUE={V(21)*(1+KLAMG*V(P,K))+KLAM*V(P,K) + V(22)}
G2   G2 K  VALUE={V(6)/KG2*(KVC-V(9))/(1+KLAMG*V(P,K)) - V(22)}
RCP  P K  1G     ; FOR CONVERGENCE
C1   K G  {CCG}  ; CATHODE-GRID 1
C2   G P  {CGP}  ; GRID 1-PLATE
C3   K P  {CCP}  ; CATHODE-PLATE
RE23 G 0 1G 
GG G K VALUE={(IGA+IGB/(IGC+V(P,K)))*(MU/KG1)*
+(PWR(V(G,K)-VGOFF,IGEX)+PWRS(V(G,K)-VGOFF,IGEX))}
.ENDS
*$

deafen · 2020-08-13 7:32 pm

Dang, that's awesome! Thank you so much!

deafen · 2020-08-13 8:40 pm

Koonw said:
2e26 model

Running into an issue. If I use a single instance of the tube, it appears to work fine (yes, I know this is not a realistic circuit):

But if I create a second instance, it gives a "1.#QNANV" error on anything connected to the plates:

I'm still learning my way around LTSpice, so I'm sure I'm doing something wrong. Any ideas how I can fix it?

deafen · 2020-08-13 10:03 pm

So, problem solved. I had to use the alternate solver. But once I did that, I was able to draw up a complete PP output stage.

The model has a couple of limitations: The plate can't go over 450V (datasheet allows 500 for ICAS), and the plate-screen delta can't go over 250. But those are no big deal for me, because I'm targeting 470V on the plates and 190V on the screens. Close enough!

Thanks again!

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