I have these two.
Code:
* Plate
* | Screen Grid
* | | Grid
* | | | Cathode
* | | | |
.SUBCKT D3a A S G K ; old model
Eat at 0 VALUE={.636*ATAN(V(A,K)/20)} ; /# is sharpness of knee
Egsg gsg 0 VALUE={LIMIT(V(S,K)/1+PWRS(V(G,K),1)/.0146+V(A,K)/80000,0,1E6)} ; s,k/#=peak current g,k/# is mu a,k/# is plate res
Egss gss 0 VALUE={LIMIT(V(S,K)/10000000000+PWRS(V(G,K),1.0)/.03+V(A,K)/80,0,1E6)} ; separating gsg,gss allows cutoff to be different
Egs2 gs2 0 VALUE={PWRS(V(gsg),1.45)}
Egs3 gs3 0 VALUE={PWRS(V(gss),1.45)}
Ecath cc 0 VALUE={V(gs2)*V(at)+V(gs3)*V(at)}
Ga A K VALUE={5.4E-5*V(cc)}
Escrn sc 0 VALUE={V(gs2)*(1.1-V(at))}
Gs S K VALUE={5.0E-5*V(sc)*LIMIT(V(S,K),0,10)/10}
Gg G K VALUE={PWR(LIMIT(V(G,K)+1,0,1E6),1.5)*(1.25-V(at))*450E-6}
Cg1 G K 8.5p
Cak A K 6.5p
Cg1a G A 1.1p
.ENDS D3a
Code:
* Plate
* | Screen Grid
* | | Grid
* | | | Cathode
* | | | |
.SUBCKT 7721/D3a A S G K
Ea Gi G value= {-.09} ; grid offset
Eat at 0 VALUE={.636*ATAN(V(A,K)/15)} ; /# is sharpness of knee
Egsg gsg 0 VALUE={LIMIT(V(S,K)/1+PWRS(V(G,K),1)/.014+V(A,K)/80000,0,1E6)} ; s,k/#=peak current g,k/# is mu a,k/# is plate res mu was too low
Egss gss 0 VALUE={LIMIT(V(S,K)/10000000000+PWRS(V(G,K),1.0)/.03+V(A,K)/80,0,1E6)} ; separating gsg,gss allows cutoff to be different
Egs2 gs2 0 VALUE={PWRS(V(gsg),1.4)}
Egs3 gs3 0 VALUE={PWRS(V(gss),1.4)}
Ecath cc 0 VALUE={V(gs2)*V(at)+V(gs3)*V(at)}
Ga A K VALUE={limit(6.4E-5*V(cc),0,v(a,k)/1.2k)} ; added knee limit 3-17-10 sb
Escrn sc 0 VALUE={V(gs2)*(1.1-V(at))}
Gs S K VALUE={limit(9.8E-5*V(sc)*LIMIT(V(S,K),0,10)/10,0,v(a,k)/800)} ; screen current was too low, added limit sb
Gg G K VALUE={PWR(LIMIT(V(G,K)+1,0,1E6),1.5)*(1.25-V(at))*450E-6}
Cg1 G K 9.5p
Cak A K 4.5p
Cg1a G A 0.04p
.ENDS D3aFrom Andrei Frolov.
Code:
* 437A - IDH miniature high-transconductance triode
* Gp P K VALUE={(m)*limit(()*V(G,K)+V(P,K),0.0,1.0e16)^1.5}
* From WE 437A datasheet - traced on 24-03-02 by AF
.subckt 437A P G K
Cgp G P 3.8p
Ci G K 11.1p
Co P K 1.0p
* Modified Koren model (8 parameters): mean fit error 1.94219 mA
Gp P K VALUE=
+ {(0.04402840226m)*limit(V(P,K)*log(1.0+(-0.3253203784)+exp((2.359465245)+
+ (2.359465245)*((38.12689842)+(-2617.293976m)*V(G,K))*V(G,K)/sqrt((54.35117386)^2+
+ (V(P,K)-(41.98740594))^2)))/(2.359465245),0.0,1.0e16)^(1.633336782)}
.ends 437AHello, I am interested in tracing out a Chinese 832a tube amp into Multisim but I can't find any tube models in multisim... do you know where I can get the 832a and 6n2p or 12ax7 tube model? is there software I can get that will have all these already in the library?
tube simulation
Is it possible to hire someone to redraw a tube amp into simulation software. I have a chinese 832a tube amp and would like to have someone make a project file. The amp is very small design. I don't think I have the skills to be able to do this on my own.
PM me if you are interested in this task.
Is it possible to hire someone to redraw a tube amp into simulation software. I have a chinese 832a tube amp and would like to have someone make a project file. The amp is very small design. I don't think I have the skills to be able to do this on my own.
PM me if you are interested in this task.
Hi artosalo,
This is a great valve indeed. I traced it time ago with my analogue tracer and haven't re-traced with uTracer yet. Still, you can use the model included here:
6P36S / 6?36? beam tetrode in triode mode | Bartola Valves
Cheers,
Ale
Hi,
Yes, 6p36s is really interesting tube. It's size compared to 6L6 and EL34 is huge.
It's heater current is specified to be 2 amps. All these refer to high power tube, but still the max. Pa + Pg2 is 16 W or 23 W depending on how you read the specification.
I think it has much more potential than one can see at first glance.
But mainly I am looking for the pentode model and hopefully find it.
Yes, 6p36s is really interesting tube. It's size compared to 6L6 and EL34 is huge.
It's heater current is specified to be 2 amps. All these refer to high power tube, but still the max. Pa + Pg2 is 16 W or 23 W depending on how you read the specification.
I think it has much more potential than one can see at first glance.
But mainly I am looking for the pentode model and hopefully find it.
Hi,
I would also be interested on a Spice/Simetrix model for 6P36S, as I'm currently experimenting a PP amplifier with it, and would like to run some simulations.
As artosalo said, it's a rather interesting tube, seems to be strong like a tank, and I believe that there might be some quite nice performance to extract from in!
Thank you!
I would also be interested on a Spice/Simetrix model for 6P36S, as I'm currently experimenting a PP amplifier with it, and would like to run some simulations.
As artosalo said, it's a rather interesting tube, seems to be strong like a tank, and I believe that there might be some quite nice performance to extract from in!
Thank you!
6P36S Pentode Model
Try this one, not perfect match but should be good enough for testing purpose:
Try this one, not perfect match but should be good enough for testing purpose:
Code:
*
* Generic pentode model: 6P36S_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Thanks to Tooru Kuroda.
* Version 3.10, Generated on Fri Apr 04 13:52:24 2014
* Plate
* | Screen Grid
* | | Control Grid
* | | | Cathode
* | | | |
.SUBCKT 6P36S_AN A G2 G1 K
.param GG {(V(G1,K)+-0.99999573)}
.param EP {URAMP(V(A,K))}
.param EG {URAMP(V(G1,K))}
.param EG2 {URAMP(V(G2,K))}
.param M1 {((0.028278791*EG2)**-0.28060747)}
.param M2 {((0.84240913*URAMP(GG+EG2/5.5727583))**1.7806075)}
.param P {(0.004800129*URAMP(GG+EG2/6.6152634)**1.5)}
.param IK {(U(GG)*P+(1-U(GG))*0.0029989754*M1*M2)}
.param IG {(0.0024000645*EG**1.5*(EG/(EP+EG)*1.2+0.4))}
.param IK2 {((IK-IG)*(1-0.4*(EXP(-EP/(EG2+1e-10)*15)-EXP(-15))))}
.param IG2T {(IK2*(0.972078544*(1-EP/(EP+10))**1.5+0.027921456))}
.param IK3 {(IK2*(EP+936.25)/(EG2+936.25))}
.param IK4 {(IK3-URAMP(IK3-(0.0035286371*(EP+URAMP(EG2-EP))**1.5)))}
.param IP {URAMP(IK4-IG2T-URAMP(IK4-IG2T-(0.0035286371*EP**1.5)))}
BIAK A K I=IP+1e-10*V(A,K)
BIG2 G2 K I=URAMP(IK4-IP)
BIGK G1 K I=IG
* CAPS
CGA G1 A 1p
CGK G1 K 19.2p
C12 G1 G2 12.8p
CAK A K 170p
.ENDSUPDATE: it worked for me in Simetrix, I had to change the line endings from Mac (CR) to Dos/Windows (CR/LF).
One single point to comment on.
The inter-electrode capacitances: there is a russian/english datasheet which specifies different values: CG1-K = 32pF, CG1-A <= 1pF, CA-K <= 21pF.
Regards!
One single point to comment on.
The inter-electrode capacitances: there is a russian/english datasheet which specifies different values: CG1-K = 32pF, CG1-A <= 1pF, CA-K <= 21pF.
Regards!
Last edited:
This works in LTSpice. I may have made a mistake or two, as I haven't tested it thoroughly. So beware...
Code:
*
* Generic pentode model: 6P36S_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Fri Apr 04 13:52:24 2014
* Plate
* | Screen Grid
* | | Control Grid
* | | | Cathode
* | | | |
.SUBCKT 6P36S_AN A G2 G1 K
BGG GG 0 V=V(G1,K)+-0.99999573
BM1 M1 0 V=(0.028278791*(URAMP(V(G2,K))+1e-10))**-0.28060747
BM2 M2 0 V=(0.84240913*(URAMP(V(GG)+URAMP(V(G2,K))/5.5727583)))**1.7806075
BP P 0 V=0.004800129*(URAMP(V(GG)+URAMP(V(G2,K))/6.6152634))**1.5
BIK IK 0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.0029989754*V(M1)*V(M2)
BIG IG 0 V=0.0024000645*URAMP(V(G1,K))**1.5*(URAMP(V(G1,K))/(URAMP(V(A,K))+URAMP(V(G1,K)))*1.2+0.4)
BIK2 IK2 0 V=V(IK,IG)*(1-0.4*(EXP(-URAMP(V(A,K))/URAMP(V(G2,K))*15)-EXP(-15)))
BIG2T IG2T 0 V=V(IK2)*(0.972078544*(1-URAMP(V(A,K))/(URAMP(V(A,K))+10))**1.5+0.027921456)
BIK3 IK3 0 V=V(IK2)*(URAMP(V(A,K))+936.25)/(URAMP(V(G2,K))+936.25)
BIK4 IK4 0 V=V(IK3)-URAMP(V(IK3)-(0.0035286371*(URAMP(V(A,K))+URAMP(URAMP(V(G2,K))-URAMP(V(A,K))))**1.5))
BIP IP 0 V=URAMP(V(IK4,IG2T)-URAMP(V(IK4,IG2T)-(0.0035286371*URAMP(V(A,K))**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 1.1p
CGK G1 K 10.8p
C12 G1 G2 7.2p
CAK A K 8p
.ENDS
Last edited: