Vacuum Tube SPICE Models

[qiuchun63]

6AC10A

 

[jcalvarez]

6A10A model

[B]** 6AC10A ****************************************[/B]
[LIST]
[*]Created on 12/07/2023 15:17 using paint_kit.jar 3.1
[*]www.dmitrynizh.com/tubeparams_image.htm
[*]Plate Curves image file:
[*]Data source link:
[/LIST]
*----------------------------------------------------------------------------------
.SUBCKT 6AC10A 1 2 3 ; Plate Grid Cathode
[LIST]
[*]PARAMS: CCG=2.4P  CGP=1.3P CCP=0.22P RGI=2000
[*]MU=102.82 KG1=285 KP=164 KVB=1.875 VCT=0.112 EX=1.372
[/LIST]
[LIST]
[*]Vp_MAX=500 Ip_MAX=36 Vg_step=1 Vg_start=0 Vg_count=5
[*]Rp=4000 Vg_ac=55 P_max=40 Vg_qui=-48 Vp_qui=300
[*]X_MIN=24 Y_MIN=19 X_SIZE=656 Y_SIZE=456 FSZ_X=1260 FSZ_Y=630 XYGrid=false
[*]showLoadLine=y showIp=y isDHT=n isPP=n isAsymPP=n showDissipLimit=y
[*]showIg1=n gridLevel2=n isInputSnapped=n
[*]XYProjections=n harmonicPlot=n dissipPlot=n
[/LIST]
*----------------------------------------------------------------------------------
...
[/QUOTE]

Pretty good match on this one, thank you! The operating point example in the datasheet matches pretty well 👍.

 

[qiuchun63]

Is the simulation model of C3g the same as C3m?

 

[euro21]

No.
C3m and C3g are quite different tubes.

 

[qiuchun63]

I cannot obtain the correct C3g simulation model, who can help me? Thank you.

 

[qiuchun63]

I don't know if this C3g simulation model is correct.

.SUBCKT C3g  P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT TEST P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=133.16 KG1=451.3 KP=18568.16 KVB=7.661 VCT=0.00594 EX=1.561 KG2=750 KNEE=9.55 KVC=2.57
+ KLAM=1.18E-6 KLAMG=3.337E-5   KNK=-0.044 KNG=0.006
+ CCG=5.5P CGP=3.5P CCP=9.5P RGI=2000.0
* Vp_MAX=400 Ip_MAX=24 Vg_step=0.25 Vg_start=0 Vg_count=6
* X_MIN=27 Y_MIN=48 X_SIZE=526 Y_SIZE=396 FSZ_X=1210 FSZ_Y=738 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=3.5 Vg_qui=-0.625 Vp_qui=167.3
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y
* showIg1=n isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n
* UL=0.43 EG2=300 gridLevel2=n addKink=n 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
G1   P K  VALUE={V(6)/KG1*ATAN(V(P,K)/KNEE)*(1+KLAMG*V(P,K))+KLAM*V(P,K)}
* Alexander Gurskii screen current, see audioXpress 2/2011
RE4K 4K K 1G ; Dummy, per Alex request
E4K 4K  4 VALUE={0} ; Dummy, per Alex request
G4K 4K K VALUE={V(6)/KG2*(KVC-ATAN(V(P,K)/KNEE))/(1+KLAMG*V(P,K))}
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
R1   G 5  {RGI}  ; FOR GRID CURRENT  
D3   5 K  DX     ; FOR GRID CURRENT }
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS

 

[b_force]

That's not really a great fit unfortunately.

 

[euro21]

I use Ayumi C3gT (triode).
Need try for accuracy.

 

[qiuchun63]

I use paint_ Kip tried multiple times but couldn't generate the correct simulation model for the five level transistor. Can anyone tell me the correct method? Thank you!

 

[qiuchun63]

After continuous exploration, I should have a preliminary understanding of the simulation model generation method for the five level tube.

C3g Model:

**** C3g ******************************************
* Created on 12/20/2023 20:51 using paint_kip.jar
* www.dmitrynizh.com/tubeparams_image.htm
* Plate Curves image file:
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT C3g P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT TEST P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=77.04 KG1=140.8 KP=374.32 KVB=39547.7 VCT=7.15E-4 EX=1.316 KG2=1354.5 KNEE=0.03225 KVC=2.57
+ KLAM=1.46E-6 KLAMG=3.75E-6 KNEE2=24.77 KNEX=7.05  KNK=-0.0944 KNG=3E-5
+ CCG=9.5P CGP=3.5P CCP=12P RGI=2000.0
* Vp_MAX=400 Ip_MAX=80 Vg_step=0.5 Vg_start=-1.5 Vg_count=6
* X_MIN=26 Y_MIN=11 X_SIZE=450 Y_SIZE=363 FSZ_X=1210 FSZ_Y=738 XYGrid=false
* Rp=5702.58 Vg_ac=1.808 P_max=3.5 Vg_qui=-2.75 Vp_qui=176.89
* showLoadLine=y showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y
* showIg1=n isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n
* UL=0.43 EG2=200 gridLevel2=n addKink=n isTanhKnee=y 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
G1   P K  VALUE={V(6)/KG1*ATAN((V(P,K)+KNEX)/KNEE)*TANH(V(P,K)/KNEE2)*(1+KLAMG*V(P,K))+KLAM*V(P,K)}
* Alexander Gurskii screen current, see audioXpress 2/2011
RE4K 4K K 1G ; Dummy, per Alex request
E4K 4K  4 VALUE={0} ; Dummy, per Alex request
G4K 4K K VALUE={V(6)/KG2*(KVC-ATAN((V(P,K)+KNEX)/KNEE)*TANH(V(P,K)/KNEE2))/(1+KLAMG*V(P,K))}
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
R1   G 5  {RGI}  ; FOR GRID CURRENT  
D3   5 K  DX     ; FOR GRID CURRENT }
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS
*$

 

[qiuchun63]

C3g G2=150V Model:

**** C3g ******************************************
* Created on 12/20/2023 21:39 using paint_kip.jar
* www.dmitrynizh.com/tubeparams_image.htm
* Plate Curves image file:
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT C3g P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT TEST P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=54.52 KG1=255.84 KP=288.9 KVB=12 VCT=0.2 EX=1.274 KG2=4410 KNEE=19.26 KVC=2.57
+ KLAM=3.906E-7 KLAMG=1.53E-6 KNEE2=19.2 KNEX=10.8  KNK=-0.044 KNG=0.006
+ CCG=9.5P CGP=3.5P CCP=12P RGI=2000.0
* Vp_MAX=500 Ip_MAX=50 Vg_step=0.5 Vg_start=0 Vg_count=7
* X_MIN=29 Y_MIN=22 X_SIZE=431 Y_SIZE=382 FSZ_X=1210 FSZ_Y=738 XYGrid=false
* Rp=9589.8 Vg_ac=1.255 P_max=3.5 Vg_qui=-1.5 Vp_qui=172.85
* showLoadLine=y showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y
* showIg1=n isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n
* UL=0.43 EG2=150 gridLevel2=n addKink=n isTanhKnee=y 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*LN(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
G1   P K  VALUE={V(6)/KG1*ATAN((V(P,K)+KNEX)/KNEE)*TANH(V(P,K)/KNEE2)*(1+KLAMG*V(P,K))+KLAM*V(P,K)}
* Alexander Gurskii screen current, see audioXpress 2/2011
RE4K 4K K 1G ; Dummy, per Alex request
E4K 4K  4 VALUE={0} ; Dummy, per Alex request
G4K 4K K VALUE={V(6)/KG2*(KVC-ATAN((V(P,K)+KNEX)/KNEE)*TANH(V(P,K)/KNEE2))/(1+KLAMG*V(P,K))}
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
R1   G 5  {RGI}  ; FOR GRID CURRENT   
D3   5 K  DX     ; FOR GRID CURRENT }
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS
*$

 

[Ciu]

Hello ,
I'm looking for 6K4P-ev LtSpice model in Triode mode
Thanks for any help

Hello !
Nobody to help ?

 

[Adrian Immler]

Hi Ciu
I tried ti achieve an acceptable fit with my model, but failed. It is most probably the same with the Paint Tool. This tube seems to be veeeery non-linear, unfortunately.

BR Adrian

 

[EL8]

Hello ,
I'm looking for 6K4P-ev LtSpice model in Triode mode
Thanks for any help

** 6K4P ****************************************

• Created on 01/06/2024 16:48 using paint_kit.jar 3.1
• www.dmitrynizh.com/tubeparams_image.htm
• Plate Curves image file: 6K4P.jpg
• Data source link:

*----------------------------------------------------------------------------------
.SUBCKT TRIODE_6K4P 1 2 3 ; Plate Grid Cathode

• PARAMS: CCG=3P CGP=1.4P CCP=1.9P RGI=2000
• MU=32.4 KG1=750 KP=56 KVB=2016 VCT=0.113 EX=1.6
• Vp_MAX=160 Ip_MAX=24 Vg_step=0.5 Vg_start=0 Vg_count=4
• Rp=4000 Vg_ac=55 P_max=1 Vg_qui=-48 Vp_qui=300
• X_MIN=87 Y_MIN=103 X_SIZE=576 Y_SIZE=437 FSZ_X=1271 FSZ_Y=662 XYGrid=false
• showLoadLine=n showIp=y isDHT=n isPP=n isAsymPP=n showDissipLimit=y
• showIg1=n gridLevel2=n isInputSnapped=n
• XYProjections=n harmonicPlot=n dissipPlot=n

*----------------------------------------------------------------------------------
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
*$

 

[Adrian Immler]

Thank you, EL8, for your model.
If you would have plotted also curves for Vg=-2.5V and Vg=-5V, one would see the fitting issues I mentioned…
BR Adrian

 

[EL8]

I guess the -5V is a marking error, it is only -3.5V or -4V, then the model will easy to create

 

[Ciu]

Thanks to Adrian and EL8 !!!

 

[Lukkas]

Hello all, I am a new member here. I would like to know whether any of you guys know where I can find an LTspice model of the QQE06/40 beam tetrode. In the meantime, as an approximate solution, I am using the 829B (so called "pentode") model from Ayumi Nakabayashi, which is a sort of similar valve -but not really equivalent- to the QQE06/40. Thank you so much in advance.

 

[Jian Wu CSNS]

Hello everyone, I would like to know if there is a tetrode model for the TH558 in this thread. I couldn't seem to find it. Thanks very much in advance!

 

[rdf]

Here is correction of scale of 6e6p-e pentode mode:

The 6E6P model returns the error message below. Is anyone aware of an alternate pentode mode version? Thanks.