Vacuum Tube SPICE Models

Koonw · 2021-06-06 6:31 pm

The actual or real limitation is screen dissipation should not be exceeded if no max screen voltage is specified, I think.

aria · 2021-06-06 6:58 pm

That is, it is 300v .... in fact I read about those who are comfortable polasizing it at 220v

chris2178 · 2021-06-17 9:56 pm

6sf5gt

EL8 · 2021-06-21 4:50 am

Hi Koonw, I am looking for PSpice Pentode & Triode models of 1F5-G, 3D6, 6SG7. Please help, Thank You.

EL8 · 2021-06-21 4:51 am

Koonw · 2021-06-21 8:29 am

3D6 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: 3d6.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 3D6 P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 3D6 P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=8.866 KG1=3288.78 KP=33.41 KVB=76.8 VCT=-1 EX=1.4 KG2=1218 KNEE=6.451 KVC=1.611
+ KLAM=5.96E-16 KLAMG=3.723E-4 KNEE2=0.7359 KNEX=0.02344  KNK=-0.14 KNG=0.00937 
+ CCG=7.5P CGP=0.3P CCP=6.5P VGOFF=-1 IGA=0.00104 IGB=0.336 IGC=37.92 IGEX=3.46
* Vp_MAX=300 Ip_MAX=30 Vg_step=1.5 Vg_start=1.5 Vg_count=15
* X_MIN=34 Y_MIN=168 X_SIZE=834 Y_SIZE=417 FSZ_X=1296 FSZ_Y=736 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=4.5 Vg_qui=-9 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=90 gridLevel2=y 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
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
*$

EL8 · 2021-06-21 9:16 am

Hello Koonw, thank you very much

The 3D6 pentode model worked great with PSpice! Please provide the Triode model together 🙂

An externally hosted image should be here but it was not working when we last tested it.

Koonw · 2021-06-21 9:46 am

I don't make triode model separately but with the Pentode (Tetrode) model. Just connect the screen to plate this will make triode mode. So you can plot it out with DC Sweep. The plate and screen current is added together for triode mode.

EL8 · 2021-06-21 11:12 am

Thanks Koonw, I try it :up:

Koonw · 2021-06-21 12:30 pm

6SG7 model:

Code:

* [URL="http://www.dmitrynizh.com/tubeparams_image.htm"]www.dmitrynizh.com/tubeparams_image.htm[/URL]
* Plate Curves image file: 6sg7.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 6SG7 P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 6SG7 P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=48.75 KG1=706.16 KP=40.28 KVB=36.69 VCT=-1.648 EX=1.61 KG2=865.83 KNEE=13.03 KVC=2.213
+ KLAM=7.226E-11 KLAMG=6.961E-5 KNEE2=5.919 KNEX=0.0525  KNK=-0.044 KNG=0.006 
+ CCG=8.5P CGP=0.003P CCP=7P VGOFF=-0.6 IGA=0.001 IGB=0.3 IGC=8 IGEX=2
* Vp_MAX=500 Ip_MAX=12.5 Vg_step=2 Vg_start=0 Vg_count=20
* X_MIN=75 Y_MIN=105 X_SIZE=556 Y_SIZE=562 FSZ_X=1296 FSZ_Y=736 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=3 Vg_qui=-19 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=100 gridLevel2=y 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
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
*$

EL8 · 2021-06-21 1:44 pm

thank you , The 6SG7 pentode model worked fine with PSpice!

Koonw · 2021-06-22 4:47 am

1f5g model:

Code:

*** 1F5G ******************************************
* Created on 06/22/2021 11:18 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: 1f5g.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT 1F5G P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT 1F5G P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=12.8 KG1=5588 KP=122.38 KVB=12 VCT=0.2 EX=1.4 KG2=16296 KNEE=8.532 KVC=2.236
+ KLAM=2.5E-8 KLAMG=6.48E-4 KNEE2=26.13 KNEX=69.3  KNK=-0.044 KNG=0.006 KNPL=50 KNSL=11 KNPR=120 KNSR=29
+ CCG=3P CGP=1.4P CCP=1.9P VGOFF=-0.6 IGA=0.001 IGB=0.3 IGC=8 IGEX=2
* Vp_MAX=400 Ip_MAX=20 Vg_step=3 Vg_start=0 Vg_count=9
* X_MIN=36 Y_MIN=113 X_SIZE=803 Y_SIZE=404 FSZ_X=1296 FSZ_Y=736 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=1.75 Vg_qui=-12 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=135 gridLevel2=y addKink=y 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
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*ATAN((V(P,K)+KNEX)/KNEE)*TANH(V(P,K)/KNEE2)} ; 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)+KNEX)/KNEE)*TANH(V(P,K)/KNEE2))/(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
*$

EL8 · 2021-06-22 7:06 am

Hi Koonw, The 1F5G pentode model worked very fine, many Thanks. 🙂

Adrian Immler · 2021-06-30 8:07 am

Hi all,

I worked the last weeks on a new generic Triode version of mine, the version i5. It has a more accurate grid current model, which will be noticeable in high-gm triodes.

I experienced that weak points are better found, when somebody else but not the inventor does test a new thing.
So, is there anybody who would like to test my PhilipsECG 6922 i5 prototype?

You can just play with it - including "misuse" like connected in wrong way, overdrive it, etc. 🙄
Any convergence problems or obviously wrong result would awake my interest 😉

Thanks

Adrian

rongon · 2021-06-30 12:56 pm

Anything I can do to help. I have plenty of modeled circuits using 6DJ8 which I can change to torture the i5 model. How about trying contact potential biasing? Perhaps running the model with very low grid-cathode voltage on the order of -0.7V? With an actual 6DJ8 that should induce some grid current. I can send screenshots of error messages, etc.

Adrian Immler · 2021-06-30 4:43 pm

Hi rongon
Cool, thank you! Will send you a PM.

Best regards, Adrian

Ray Waters · 2021-06-30 7:55 pm

Adrian Immler said:
So, is there anybody who would like to test my PhilipsECG 6922 i5 prototype?

I do a lot of designs using the 6922 so I would be willing to try your new model. I have several 6DJ8/E88CC models that I use, and I have a couple of circuits that don't work well with certain models. This should be a good test.

Flikoman · 2021-07-01 4:20 am

I'm looking for ECL84 triode spice model.

Thanks

Adrian Immler · 2021-07-01 7:09 am

Ray Waters said:
I do a lot of designs using the 6922 so I would be willing to try your new model. I have several 6DJ8/E88CC models that I use, and I have a couple of circuits that don't work well with certain models. This should be a good test.

Hi Ray
That's perfect, thank you! I will send you a PM.

cheers, Adrian

jan.didden · 2021-07-01 9:02 am

Gents, anyone per chance has a model for the 6HB5? It's a high voltage pentode.

BTW, did you notice that LTspice calls a pentode a 'pentrode'? Tongue in cheek or typo?

Jan

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