Vacuum Tube SPICE Models

jazbo8 · 2017-10-25 6:21 pm

6T4 SPICE Model

Code:

*
* Generic triode model: 6T4_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Wed Oct 25 19:21:03 2017
*              Anode
*              | Grid
*              | | Cathode
*              | | |
.SUBCKT 6T4_AN A G K
BGG   GG   0 V=V(G,K)+0.51407227
BM1   M1   0 V=(0.074519235*(URAMP(V(A,K))+1e-10))**-1.502531
BM2   M2   0 V=(0.49957852*(URAMP(V(GG)+URAMP(V(A,K))/6.715333)+1e-10))**3.002531
BP    P    0 V=0.002492787*(URAMP(V(GG)+URAMP(V(A,K))/13.441997)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0024991095*V(M1)*V(M2)
BIG   IG   0 V=0.0012463935*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0015296761*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1.7p
CGK   G    K 2.9p
CAK   A    K 0.2p
.ENDS

jazbo8 · 2017-10-25 6:22 pm

rongon said:
That's a brand new 12B4A model. Do you think that's better than the previous one in the pctube zip file?

I forgot to check, so they should be the same...

rongon · 2017-10-25 11:46 pm

They are a little bit different. Not huge differences.

First version (from pctube zip file dated March 8, 2008):

Code:

*
* Generic triode model: 12B4_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Sat Mar  8 22:41:12 2008
*                Plate
*                | Grid
*                | | Cathode
*                | | |
.SUBCKT 12B4_AN A G K
BGG   GG   0 V=V(G,K)+1
BM1   M1   0 V=(0.087065329*(URAMP(V(A,K))+1e-10))**-1.2036947
BM2   M2   0 V=(0.55479636*(URAMP(V(GG)+URAMP(V(A,K))/5.1134435)+1e-10))**2.7036947
BP    P    0 V=0.0047680512*(URAMP(V(GG)+URAMP(V(A,K))/9.2167935)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0036584566*V(M1)*V(M2)
BIG   IG   0 V=0.0023840256*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0031806909*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 4.8p
CGK   G    K 5p
CAK   A    K 1.5p
.ENDS

This last version (dated Oct 25, 2017):

Code:

*
* Generic triode model: 12B4_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Wed Oct 25 19:11:01 2017
*               Anode
*               | Grid
*               | | Cathode
*               | | |
.SUBCKT 12B4_AN A G K
BGG   GG   0 V=V(G,K)+0.99633808
BM1   M1   0 V=(0.08624954*(URAMP(V(A,K))+1e-10))**-1.1787665
BM2   M2   0 V=(0.55995921*(URAMP(V(GG)+URAMP(V(A,K))/5.1019494)+1e-10))**2.6787665
BP    P    0 V=0.0045829947*(URAMP(V(GG)+URAMP(V(A,K))/9.1112876)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0034496543*V(M1)*V(M2)
BIG   IG   0 V=0.0022914974*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0030663387*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 4.8p
CGK   G    K 5p
CAK   A    K 1.5p
.ENDS

Different enough to make a difference?
--

jazbo8 · 2017-10-26 7:35 am

I doubt it, considering the tube tolerence. Either one should do the job.

rongon · 2017-10-26 10:03 pm

Cool. That means we have two models to use for that one type, which can be used to model slightly dissimilar triodes in an LTP, for instance, just by choosing one of each version of that type from the device menu. Works for me!

cogsncogs · 2017-10-29 9:00 pm

dirkwright said:
I'm sorry, I can't find any spice models for the 6AF4 or 6T4. It looks like these are all equivalents, but I have not studied them in detail. If anyone has a model for the 6AF4 or 6T4, I'd be really happy to have it, thanks.

The 6T4 and 12B4 models posted by jazbo8 should work in TI.

Below are my 6AF4A, 6T4 and 12B4A models in Spice 3f4 format for use in TI. To use in LTspice change all instances of "^" to "**", without the quotes.

6AF4A:

Code:

*
* 6AF4A UHF triode Spice 3F4 model
* Modified Koren model (8 parameters) mean fit error 0.125726mA
* Traced using Curve Captor v0.9.1 by Wayne Clay on 09/30/2006
* from General Electric data sheet
*              Plate
*              | Grid
*              | | Cathode
*              | | |
.subckt 6AF4A  P G K
    Bp  P K  I=
+ (0.1611586566m)*uramp(V(P,K)*ln(1.0+(-0.02062628498)+exp((2.496023586)+
+ (2.496023586)*((17.06436679)+(-15.25965134m)*V(G,K))*V(G,K)/sqrt((16.25821586)^2+
+ (V(P,K)-(-0.4682646032))^2)))/(2.496023586))^(1.251660461)
  Cgp G P 2.6p ; 0.7p added
  Cgk G K 2.9p ; 0.7p added
  Cpk P K 1.9p ; 0.5p added
  Rpk P K 1G ; to avoid floating nodes
  d3  G K dx1
.model dx1 d(is=1n rs=2k cjo=1pf N=1.5 tt=1n)
.ends 6AF4A

6T4:

Code:

*
* 6T4 Spice 3F4 model
* Modified Koren model (8 parameters): mean fit error 0.494813mA
* Traced by Wayne Clay on 9/8/2007 using Curve Captor v0.9.1
* from Sylvania data sheet
*            Plate
*            | Grid
*            | | Cathode
*            | | |
.subckt 6T4  P G K
    Bp  P K  I=
+ (0.000134918778m)*uramp(V(P,K)*ln(1.0+(-0.09760272839)+exp((0.0164518854)+
+ (0.0164518854)*((1070.31832)+(78.92233257m)*V(G,K))*V(G,K)/sqrt((57.19371883)^2+
+ (V(P,K)-(8.743638001))^2)))/(0.0164518854))^(1.565722555)
    Cgp G P 2.1p ; 0.2p added
    Cgk G K 3.6p ; 0.7p added
    Cpk P K 0.45p ; 0.2p added
    Rpk P K 1G ; to avoid floating nodes
    d3  G K dx1
.model dx1 d(is=1n rs=2k cjo=1pf N=1.5 tt=1n)
.ends 6T4

12B4A:

Code:

*
* 12B4A Spice 3F4 model
* Modified Koren model (8 parameters): mean fit error 0.484782mA
* Traced by Wayne Clay on 9/7/2006 using Curve Captor v0.9.1
* from General Electric datasheet.
*              Plate
*              | Grid
*              | | Cathode
*              | | |
.subckt 12B4A  P G K
    Bp  P K  I=
+ (0.3356616153m)*uramp(V(P,K)*ln(1.0+(-0.06344506052)+exp((4.347600947)+
+ (4.347600947)*((7.172008489)+(-12.73970121m)*V(G,K))*V(G,K)/sqrt((42.51568199)^2+
+ (V(P,K)-(19.98899827))^2)))/(4.347600947))^(1.207143141)
    Cgk G K 5.0p
    Cgp G P 4.8p
    Cpk P K 1.5p
    Rpk P K 1.0G ; to avoid floating nodes
    d3  G K dx1
.model dx1 d(is=1n rs=2k cjo=1pf N=1.5 tt=1n)
.ends 12B4A

dirkwright · 2017-10-30 2:49 pm

Thanks so much!
Best Regards, Dirk

cogsncogs · 2017-10-30 8:15 pm

For those who prefer/want an Ayumi 6AF4A model.

Traced from General Electric 6AF4A datasheet.

Code:

*
* Generic triode model: 6AF4A
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Mon Oct 30 15:55:01 2017
*                Plate
*                | Grid
*                | | Cathode
*                | | |
.SUBCKT 6AF4A_AN A G K
BGG   GG   0 V=V(G,K)+0.57582328
BM1   M1   0 V=(0.092328554*(URAMP(V(A,K))+1e-10))**-2.2616446
BM2   M2   0 V=(0.39876175*(URAMP(V(GG)+URAMP(V(A,K))/6.5119426)+1e-10))**3.7616446
BP    P    0 V=0.0032769425*(URAMP(V(GG)+URAMP(V(A,K))/16.330409)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0082945898*V(M1)*V(M2)
BIG   IG   0 V=0.0016384713*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0019440308*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1.9p
CGK   G    K 2.2p
CAK   A    K 1.4p
.ENDS

MiiB · 2017-11-07 4:47 pm

Hi
I'm looking for a spicemodel (LT) of the 4P1L tube and the corresponding DHT and DHP symbols. are there anyone here with the LT ready made direct heated symbol and corresponding sub circuits.

euro21 · 2017-11-08 12:41 pm

MiiB said:
Hi
I'm looking for a spicemodel (LT) of the 4P1L tube and the corresponding DHT and DHP symbols. are there anyone here with the LT ready made direct heated symbol and corresponding sub circuits.

4P1L SPICE model updated – Bartola(R) Valves
Composite Tube Models

triodedht.asy:

Version 4
SymbolType CELL
LINE Normal -48 0 -28 0
LINE Normal -20 0 -12 0
LINE Normal -4 0 4 0
LINE Normal 12 0 20 0
LINE Normal 28 0 36 0
LINE Normal 0 -48 0 -16
LINE Normal -20 -16 20 -16
LINE Normal -20 -12 20 -12
LINE Normal -20 -16 -20 -12
LINE Normal 20 -16 20 -12
LINE Normal 16 32 16 65
LINE Normal -16 33 -16 65
LINE Normal 1 24 16 32
LINE Normal -16 33 1 24
CIRCLE Normal -48 -48 48 48
WINDOW 0 8 -64 Left 0
WINDOW 3 62 -29 Left 0
SYMATTR Value TriodeDHT
SYMATTR Prefix X
SYMATTR Description This symbol is for use with a subcircuit macromodel that you supply.
PIN 0 -48 NONE 0
PINATTR PinName P
PINATTR SpiceOrder 1
PIN -48 0 NONE 0
PINATTR PinName G
PINATTR SpiceOrder 2
PIN -16 64 NONE 0
PINATTR PinName K1
PINATTR SpiceOrder 3
PIN 16 64 NONE 8
PINATTR PinName K2
PINATTR SpiceOrder 4

jazbo8 · 2017-11-14 7:22 am

What’s the point of modeling 3 extra resistors, it literally tells you nothing...

deafbykhorns · 2017-11-28 2:18 am

6HS5 Tube data

This is one HV tube with a mu of about 300
might be a good candidate for a two stage boat anchor but cant find any models.

jazbo8 · 2017-11-28 7:49 am

Isn't the 6HS5 a voltage regulator? Are you thinking of another tube?

Triodethom · 2017-11-28 2:16 pm

jazbo8 said:
Isn't the 6HS5 a voltage regulator? Are you thinking of another tube?

Is it not a beam Triode .

jazbo8 · 2017-11-28 3:12 pm

6HS5 Triode SPICE Model

I guess it can be used for audio... Thomas Mayer has some characteristic posted on his blog (no idea where it came from), so I built a model based on that.

Code:

*
* Generic triode model: 6HS5_T_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Tue Nov 28 16:11:06 2017
*                 Anode
*                 | Grid
*                 | | Cathode
*                 | | |
.SUBCKT 6HS5_T_AN A G K
BGG   GG   0 V=V(G,K)+0.49599387
BM1   M1   0 V=(7.8015469e-05*(URAMP(V(A,K))+1e-10))**-0.038461538
BM2   M2   0 V=(0.975*(URAMP(V(GG)+URAMP(V(A,K))/320.44927)+1e-10))**1.5384615
BP    P    0 V=0.015408709*(URAMP(V(GG)+URAMP(V(A,K))/328.66592)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.013383554*V(M1)*V(M2)
BIG   IG   0 V=0.0077043544*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0077747318*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1.6p
CGK   G    K 24p
CAK   A    K 6.5p
.ENDS

dirkwright · 2017-11-28 8:27 pm

6N3P/2C51/5670 please

Hello, I did a search of this thread but did not find a model for this tube series. It seems like a really good tube for audio, so I would be happy to have a spice model for it. Thanks so much.

jazbo8 · 2017-11-29 7:47 am

5670 SPICE Model

Code:

*
* Generic triode model: 5670_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Wed Nov 29 08:47:18 2017
*               Anode
*               | Grid
*               | | Cathode
*               | | |
.SUBCKT 5670_AN A G K
BGG   GG   0 V=V(G,K)+-0.044770209
BM1   M1   0 V=(0.032175849*(URAMP(V(A,K))+1e-10))**-2.2476294
BM2   M2   0 V=(0.40025303*(URAMP(V(GG)+URAMP(V(A,K))/18.639663)+1e-10))**3.7476294
BP    P    0 V=0.0040093865*(URAMP(V(GG)+URAMP(V(A,K))/46.569699)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0099503146*V(M1)*V(M2)
BIG   IG   0 V=0.0020046932*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0021345255*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1.1p
CGK   G    K 2.2p
CAK   A    K 1.0p
.ENDS

cogsncogs · 2017-11-29 11:21 pm

6N3P model

Tina TI:

Code:

*
* Generic triode model: 6N3P
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Thu Oct 19 19:50:08 2017
*               Plate
*               | Grid
*               | | Cathode
*               | | |
.SUBCKT 6N3P_AN A G K
.PARAM X1=-0.11928788 X2=0.03722232 X3=-2.9881353
.PARAM X4=0.33421452 X5=17.886727 X6=4.4881353
.PARAM X7=0.005363785 X8=53.518701 X9=0.042057861
.PARAM Y1=0.0026818925 Y2=0.0028329265
BK IK 0 V=U(V(G,K)+X1)*X7*URAMP(V(G,K)+X1+URAMP(V(A,K))/X8)^1.5+(1-U(V(G,K)+X1))*X9*(X2*URAMP(V(A,K)))^X3*(X4*URAMP(V(G,K)+X1+URAMP(V(A,K))/X5))^X6
BA A K I=URAMP((Y2*URAMP(V(A,K))^1.5)-URAMP((Y2*URAMP(V(A,K))^1.5)-V(IK)+Y1*URAMP(V(G,K))^1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+.4)))+1E-10*V(A,K)
BG G K I=Y1*URAMP(V(G,K))^1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+.4)
* CAPS
CGA G A 1.6p
CGK G K 2.8p
CAK A K 1.4p
.ENDS

LTspice:

Code:

*
* Generic triode model: 6N3P
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Thu Oct 19 19:50:08 2017
*               Plate
*               | Grid
*               | | Cathode
*               | | |
.SUBCKT 6N3P_AN A G K
BGG   GG   0 V=V(G,K)+-0.11928788
BM1   M1   0 V=(0.03722232*(URAMP(V(A,K))+1e-10))**-2.9881353
BM2   M2   0 V=(0.33421452*(URAMP(V(GG)+URAMP(V(A,K))/17.886727)+1e-10))**4.4881353
BP    P    0 V=0.005363785*(URAMP(V(GG)+URAMP(V(A,K))/53.518701)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.042057861*V(M1)*V(M2)
BIG   IG   0 V=0.0026818925*URAMP(V(G,K))**1.5*(URAMP(V(G,K))/(URAMP(V(A,K))+URAMP(V(G,K)))*1.2+0.4)
BIAK  A    K I=URAMP(V(IK,IG)-URAMP(V(IK,IG)-(0.0028329265*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 1.6p
CGK   G    K 2.8p
CAK   A    K 1.4p
.ENDS

@jazbo In your 5670 Ayumi model, the CAK line should be CAK A K 1.0p.

deafbykhorns · 2017-11-30 1:15 am

jazbo8 said:
I guess it can be used for audio... Thomas Mayer has some characteristic posted on his blog (no idea where it came from), so I built a model based on that.

THanks, I’ll give it a try
It’s a high voltage dual triode, compactron base.
Looks very linear and may be suitable for a two stage amp, etc

cogsncogs · 2017-11-30 1:56 am

deafbykhorns said:
THanks, I’ll give it a try
It’s a high voltage dual triode, compactron base.
Looks very linear and may be suitable for a two stage amp, etc

It's a Beam Triode, meaning it has a beam forming plate. It is not a dual triode.

Vacuum Tube SPICE Models

Ex-Moderator

Ex-Moderator

Member

Ex-Moderator

Member

Member

Member

Member

Attachments

Member

Member

Ex-Moderator

Member

Ex-Moderator

Member

Ex-Moderator

Member

Ex-Moderator

Member

Member

Member