tubemodel_3.01_win.zip
EF184 would be 6EJ7 in the above zip.
EC900/6HA5
* 6HA5 LTSpice model
* Koren model (5 parameters): mean fit error 1.27016mA
* Traced by Wayne Clay on 9/6/07 using Curve Captor v0.9
* from GE datasheet
.subckt 6HA5 P G K
Bp P K I=
+ (0.0007088605362m)*uramp(V(P,K)*ln(1.0+exp((0.01050076569)+
+ (0.01050076569)*(16410.47684)*V(G,K)/sqrt((7.516756983k)+
+ (V(P,K))**2)))/(0.01050076569))**(1.177167506)
Cgp G P 0.56p ; 0.2p added
Cgk G K 5p ; 0.7p added
Cpk P K 3.1p ; 0.2p added
.ends 6HA5
EF184 would be 6EJ7 in the above zip.
EC900/6HA5
* 6HA5 LTSpice model
* Koren model (5 parameters): mean fit error 1.27016mA
* Traced by Wayne Clay on 9/6/07 using Curve Captor v0.9
* from GE datasheet
.subckt 6HA5 P G K
Bp P K I=
+ (0.0007088605362m)*uramp(V(P,K)*ln(1.0+exp((0.01050076569)+
+ (0.01050076569)*(16410.47684)*V(G,K)/sqrt((7.516756983k)+
+ (V(P,K))**2)))/(0.01050076569))**(1.177167506)
Cgp G P 0.56p ; 0.2p added
Cgk G K 5p ; 0.7p added
Cpk P K 3.1p ; 0.2p added
.ends 6HA5
Last edited:
Here's more 6ha5 models:
http://www.diyaudio.com/forums/tubes-valves/81978-looking-spice-model-6ha5-similar-tubes.html
http://www.diyaudio.com/forums/tubes-valves/81978-looking-spice-model-6ha5-similar-tubes.html
6HM5
Code:
* 6HM5_k8 LTSpice model
.subckt 6HM5_k8 P G K
Bp P K I=(0.001154846006m)*uramp(V(P,K)*ln(1.0+(-0.0008415623491)+exp((0.05049252985)+(0.05049252985)*((5446.000628)+(178663.8165m)*V(G,K))*V(G,K)/sqrt((-0.2140185688)**2+(V(P,K)-(-162.56846))**2)))/(0.05049252985))**(1.356125726)
.ends 6HM5_k8
Code:
* 6HM5 LTSpice model
* Koren model (5 parameters): mean fit error 1.20978mA
* Traced by Wayne Clay on 9/9-07 using Curve Captor v0.9
* from GE datasheet
.subckt 6HM5-k5 P G K
Bp P K I=
+ (0.0005835219273m)*uramp(V(P,K)*ln(1.0+exp((0.005618954395)+
+ (0.005618954395)*(31322.45425)*V(G,K)/sqrt((8.885069314k)+
+ (V(P,K))**2)))/(0.005618954395))**(1.124019828)
Cgp G P 0.54p ; 0.2p added
Cgk G K 5.2p ; 0.7p added
Cpk P K 3.2p ; 0.2p added
.ends 6HM5-k5I don't have any good ones for those tubes. Here's 6BE6 and 6CS6 models that use an op-amp symbol. To use 3f4 in LTSpice you may have to change ^ to **.
Code:
*Vacuum Tube pentagrid (sharp cutoff)
.SUBCKT X6CS6close G 3 S K A
*model written to use op-amp symbol +in=g1,-in=g3, +supply=g2g4, -supply=kg5, out=plate
*work in progress, not final
* Calculate contribution to cathode current
*
*the number at the right end determines sharpness of knee
Bat at 0 V=0.636*ATAN(V(A,K)/8)
*the URAMP(V(S,K)/# mostly determines peak plate current, grid line spacing nearly constant
*the number at the right end determines slope of grid lines (plate resistance)
Bgs gs 0 V=URAMP(V(S,K)*1.6164+V(G,K)*24.75+V(A,K)/9000)
Bgss gss 0 V=URAMP(V(S,K)*0.0005+V(3,K)*0.0075+V(A,K)/9000)
*the exponent sets the linearity of grid line spacing, and big impact on peak plate currrent
Bgs2 gs2 0 V=V(gs)^1.5
Bgs3 gs3 0 V=V(gss)^1.5
Bcath cc 0 V=V(gs2)*V(at)
Ban an 0 V=V(gs2)*V(at)*(V(gs3))
*
* Calculate anode current, grid line spacing adjust and peak plate current
*
Ba A K I=0.345E-3*V(an)
*
* Calculate screen current
*
Bscrn sc 0 V=V(gs2)*(1.0-V(at))
Bs S K I=(URAMP(0.64E-3*V(sc)-(1.45E-3*(V(an)))))*0.29*(V(at))
*
* Grid current (approximation - does not model low va/vs)
*
Bg G K I=(URAMP(V(G,K)+1)^1.5)*50E-6
*
* Capacitances
*
Cg1 G K 5.5p
Cak A K 7.5p
Cg3 3 S 7p
Cg1g3 G 3 0.36p
Cg1a G A 0.07p
.ENDS X6CS6close
*****************************
Code:
*Vacuum Tube pentagrid (g3 remote cutoff)
.SUBCKT X6BE6close G 3 S K A
*model written to use op-amp symbol +in=g1,-in=g3, +supply=g2g4, -supply=kg5, out=plate
*work in progress, not final
* Calculate contribution to cathode current
*
*the number at the right end determines sharpness of knee
Bat at 0 V=0.636*ATAN(V(A,K)/8)
*the URAMP(V(S,K)/# mostly determines peak plate current, grid line spacing nearly constant
*the number at the right end determines slope of grid lines (plate resistance)
Bgs gs 0 V=URAMP(V(S,K)*1.6164+V(G,K)*24.75+V(A,K)/9000)
Bgss gss 0 V=URAMP(V(S,K)*0.0005+V(3,K)*0.0045+V(A,K)/9000)
*the exponent sets the linearity of grid line spacing, and big impact on peak plate currrent
Bgs2 gs2 0 V=V(gs)^1.5
Bgs3 gs3 0 V=V(gss)^2.7
Bcath cc 0 V=V(gs2)*V(at)
Ban an 0 V=V(gs2)*V(at)*(V(gs3))
*
* Calculate anode current, grid line spacing adjust and peak plate current
*
Ba A K I=0.345E-2*V(an)
*
* Calculate screen current
*
Bscrn sc 0 V=V(gs2)*(1.0-V(at))
Bs S K I=(URAMP(2.34E-4*V(sc)-(0.95E-2*(V(an)))))*0.29*(V(at))
*
* Grid current (approximation - does not model low va/vs)
*
Bg G K I=(URAMP(V(G,K)+1)^1.5)*50E-6
*
* Capacitances
*
Cg1 G K 3p
Cak A K 8p
Cg3 3 S 7p
Cg1g3 G 3 0.15p
Cg1a G A 0.1p
.ENDS X6BE6close
***************************************
Hi again. I found that this guy has made his own tube models using a point to point curve digitalizing, and has a great job and explained it. But I could't find why in some instances he used a "dummy resistor" in the text and how to estimate or calculate it and for what did he use it. Can somebody explain me this?
Best regards.
Best regards.
You can send him a private message to see if he would answer your question. But looking at the model, I think the dummy resistors are used for either source or load impedance, most likely for SPICE calculation convergence purpose.
Some don't work but most do, is my experience. I don't use LTSpice but SIMetrix, here is the Ia vs Vs plot for the 6EJ7 using Ayumi's model, matches up well with the datasheet:
An externally hosted image should be here but it was not working when we last tested it.
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