Please look more carefully at the code... hint, what are the L's and the K's doing?
When available, the L's are based on the data provided by the manufacturers, else, they are based on the measurements e.g., as shown by Yves M. and others.
Thanks, it is indeed better, from 0V to -10V could be better though, I will try to re-do Ayumi's GU-50 model when I get a chance, not sure which datasheet JA2DHC used for his version, but it certainly does not match up well with the LS50 data.LS50 curves from post 617
Curves by Matejs model (from -5 to -25 V) looks good.
Do you know which datasheet the GU-50 model was based on? I am not able to match it to any of the GU/LS/RY-50 datasheets I have seen...
For example, here is one vs. the Telefunken LS50:
No i just downloaded a model that i found.
Last edited:
E180F SPICE Model
Here you go:
Here you go:
Code:
*
* Generic pentode model: E180F_AN
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Fri Dec 05 13:13:13 2014
* Plate
* | Screen Grid
* | | Control Grid
* | | | Cathode
* | | | |
.SUBCKT E180F_AN A G2 G1 K
BGG GG 0 V=V(G1,K)+-0.47741291
BM1 M1 0 V=(0.011310585*(URAMP(V(G2,K))+1e-10))**-1.1037743
BM2 M2 0 V=(0.57608681*(URAMP(V(GG)+URAMP(V(G2,K))/37.479334)))**2.6037743
BP P 0 V=0.021640679*(URAMP(V(GG)+URAMP(V(G2,K))/65.058484))**1.5
BIK IK 0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.015425385*V(M1)*V(M2)
BIG IG 0 V=0.010820339*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)*(0.79503106*(1-URAMP(V(A,K))/(URAMP(V(A,K))+10))**1.5+0.20496894)
BIK3 IK3 0 V=V(IK2)*(URAMP(V(A,K))+2280)/(URAMP(V(G2,K))+2280)
BIK4 IK4 0 V=V(IK3)-URAMP(V(IK3)-(0.011321203*(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)-(0.011321203*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 0.03p
CGK G1 K 0.1p
C12 G1 G2 0p
CAK A K 0.1p
.ENDSI have this one:
.SUBCKT E180F 1 4 2 3
+ PARAMS: MU= 56.00 EX= 1.350 KG1= 250.0 KP=6709.19 KC= 850
+ KVB= 7.9 VCT= 0.00 RGI=2k
+ CCG=8.5P CPG1=0.03P CCP=3P
RE1 7 0 1G
RE2 8 3 1G
E1 7 0 VALUE= ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(4,3)/KP*LOG(1+EXP((1/MU+V(2,3)/V(4,3))*KP))}
G1 1 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))/KG1*ATAN(V(1,3)/KVB)}
G2 8 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))/KC*(2.5708-ATAN(V(1,3)/KVB))}
E2 8 4 VALUE={0}
RCP 1 3 1G ; FOR CONVERGENCE
C1 2 3 {CCG} ; CATHODE-GRID 1
C2 1 2 {CPG1} ; GRID 1-PLATE
C3 1 3 {CCP} ; CATHODE-PLATE
R1 2 5 {RGI} ; FOR GRID CURRENT
D3 5 3 DX ; FOR GRID CURRENT
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS
Please check which one is better.
Some manufacturers provide the primary inductance (obviously) based on on the "old" test procedure (5 Vrms/50Hz), some, like Edcor does not provide this info at all and some. like Amplimo gives the "maximum" value, whic refers to some 200 Vrms tets voltage.
The primary inductance value can vary from, say 25 H to 125 H depending on the test voltage.
As an example, I measured the Lp of Indel TGL40/001, which is a OPT I have used a lot.
The results with different test voltage (50 Hz):
1Vrms......6.8 H
5 -"- .......9.4 H
50 -"-..... 23 H
100 -"- ....32 H
200 Vrms...43 H
When simulating, the results with 6.8 H and 43 H are very, very different.
So, this is not that simple matter.
Understood, the user needs to determine the correct parameters to use for the model, garbage in = garbage out, etc.
