6146B SPICE model wanted

[marcusbritanicus]

Hi folks,

I am using NI Multisim 11 and trying to build a 6146B pentode model. Does anyone have a "pentode connected" 6146 Spice Model for me ???

Thanks in advance...

 

[revintage]

What about using Google? This one is one of the first that comes up. It is for the diyaudio-standard LTSpice. Intactaudio ´s Sim City is invaluable.

:: View topic - Drop Down Menus for selecting your tube

 

[marcusbritanicus]

revintage, I did google it but the LTSpice Model of 6146 doesnot work with NI Multisim 11. I tried that out already..

 

[cogsncogs]

May be the wrong flavor of spice. I don't know since I haven't tried Multisim.
Here's a couple others I have:

*Vacuum Tube Tetrode 6146
.SUBCKT X6146 A S G K
*
* Calculate contribution to cathode current
*
Bat    at  0    V=0.636*ATAN(V(A,K)/10)
Bme    me  0   V=URAMP(V(A,K)/130)
Bmup    mup 0    V=1-(URAMP(V(K,G)-30)/2000)
Bmu     mu  0    V=V(G,K)*V(mup)
Bgs    gs  0    V=URAMP(V(S,K)*4.5+V(mu)*19+URAMP(V(A,K))/10)
Bgs2    gs2 0    V=(V(gs)^1.5)*16E-6
Bsd    sd  0    V=URAMP(V(gs2)*V(at)-v(me))
Bcath    cc  0    V=V(gs2)*V(at) - V(sd)
*
* Calculate anode current
*
Ba    A   K    I=V(cc)
*
* Calculate screen current
*
Bscrn    sc  0    V=2.5E-4*(V(S,K)^1.5)*V(gs2)*(1.1-V(at))+V(sd)
Bs    S   K    I=V(sc)
*
* Grid current
*
*Bg    G   K    I=(URAMP(V(G,K)+1)^1.5)*(1.25-V(at))*870E-6
*
* Capacitances
*
Cg1    G    K    13.0p
Cak    A    K    8.5p
Cg1a    G    A    0.24p

.ENDS X6146

*
* Generic pentode model: 6146B
* Copyright 2003--2006 by Ayumi Nakabayashi, All rights reserved.
* Version 3.01, Generated on Wed Mar 22 17:22:51 2006
.SUBCKT 6146B A G2 G1 K
BGG   GG   0 V=V(G1,K)+0.99999998
BEP   EP   0 V=URAMP(V(A,K))+1e-10
BEG   EG   0 V=URAMP(V(G1,K))+1e-10
BEG2  EG2  0 V=URAMP(V(G2,K))+1e-10
BM1   M1   0 V=(0.058258554*(URAMP(V(EG2)-1e-10)+1e-10))^-0.41427032
BM2   M2   0 V=(0.78358839*(URAMP(V(GG)+V(EG2)/3.7146753)+1e-10))^1.9142703
BP    P    0 V=0.001563206*(URAMP(V(GG)+V(EG2)/4.7405951)+1e-10)^1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0009173158*V(M1)*V(M2)
BIG   IG   0 V=0.000781603*V(EG)^1.5*(V(EG)/(V(EP)+V(EG))*1.2+0.4)
BIK2  IK2  0 V=V(IK,IG)*(1-0.4*(EXP(-V(EP)/V(EG2)*15)-EXP(-15)))
BIG2T IG2T 0 V=V(IK2)*(0.956750418*(1-V(EP)/(V(EP)+10))^1.5+0.043249582)
BIK3  IK3  0 V=V(IK2)*(V(EP)+3004)/(V(EG2)+3004)
BIK4  IK4  0 V=V(IK3)-URAMP(V(IK3)-(0.0013014595*(V(EP)+URAMP(V(EG2,EP)))^1.5))
BIP   IP   0 V=URAMP(V(IK4,IG2T)-URAMP(V(IK4,IG2T)-(0.0013014595*V(EP)^1.5)))
BIAK  A    K I=V(IP)+1e-10*V(A,K)
BIG2  G2   K I=URAMP(V(IK4,IP))
BIGK  G1   K I=V(IG)
* CAPS
CGA   G1  A  0.22p
CGK   G1  K  7.7p
C12   G1  G2 5.1p
CAK   A   K  8.3p
.ENDS

 

[marcusbritanicus]

Thanks a lot cogsncogs. That really helped. I am still stuck though. I am trying to simulate the circuit to measure the characteristics. The circuit I rigged up is in the figure. I used the same circuit for 6V6GTA curve and I got a good match. But 6146B im no where. Can some one please give me a few pointers as to what is wrong? The model Im using is the second one given by cogsncogs. I tried the other models but no use.

 

[revintage]

Yes, that one is totally useless. Have you converted now, looks like LTSpice to me?

Make a tetrode.asc from this. If it doesn´t work, I can mail the *.asc to you.

Version 4
SHEET 1 880 680
WIRE -416 -64 -560 -64
WIRE -544 48 -640 48
WIRE -416 48 -464 48
WIRE -640 64 -640 48
WIRE -416 96 -416 48
WIRE -560 112 -560 -64
WIRE -560 112 -592 112
WIRE -688 128 -768 128
WIRE -672 208 -672 176
WIRE -640 208 -672 208
WIRE -416 208 -416 176
WIRE -416 208 -640 208
WIRE -768 224 -768 208
WIRE -640 224 -640 208
FLAG -640 224 0
FLAG -768 224 0
FLAG -416 16 0
SYMBOL Misc\\battery -416 80 R0
SYMATTR InstName V4
SYMATTR Value {Ua2}
SYMBOL Misc\\battery -768 112 R0
WINDOW 0 -68 89 Left 0
WINDOW 3 -87 15 Left 0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V5
SYMATTR Value {Ug2}
SYMBOL Misc\\tetrode -640 112 R0
WINDOW 0 6 -80 Left 0
SYMATTR InstName U2
SYMATTR Value 6AU6
SYMBOL res -448 32 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName R6
SYMATTR Value 1n
SYMBOL Misc\\battery -416 -80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V6
SYMATTR Value 150
TEXT -728 -8 Left 0 !.op
TEXT -656 336 Left 0 !.step param Ua2 0 300 5
TEXT -656 296 Left 0 !.step param Ug2 0 -3 .5
TEXT -656 376 Left 0 !.inc tetrode.inc

 

[revintage]

As you surely understand, but maybe not all, just click the anoderesistor to plot the curves.

 

[marcusbritanicus]

Thanks for the circuit revintage.. It works like a dream yes! I switched over to LTSpice. I changed the lines

TEXT -656 336 Left 0 !.step param Ua2 0 300 5
TEXT -656 296 Left 0 !.step param Ug2 0 -3 .5

to
.dc Ua2 0 800 1 Ug2 -50 30 10
Ive attached the circuit and the curve image. Thanks a lot..

 

[revintage]

You´re using nonstandard LTSpice commands. Will come back with the correct ones after work.

Off course works with whatever you use.

 

[revintage]

As both works equally well you can go with your. Normally I use the ".step param V1...."-commands.

 

[vmed_cha_gr]

Have a look here for new 6146B tubes : http://www.ebay.ie/itm/270994112877...LX:IT&_trksid=p3984.m1555.l2649#ht_500wt_1156