Where to download Type 45 audio tube for LTspice?

[supernut]

Hi,

Does anyone know how to download type 45 .subkt in LTspice?

Thank you very much.

 

[tikiroo]

https://www.bartola.co.uk/valves/wp-content/uploads/2019/02/45-DHT-Sylvania-model.txt

 

[supernut]

https://www.bartola.co.uk/valves/wp-content/uploads/2019/02/45-DHT-Sylvania-model.txt

Thank you

 

[tikiroo]

I had to edit it a bit to get it to work:

** 45 SYLVANIA Composite DHT ***************************************

• Created on 02/16/2019 11:49 using paint_kit.jar 3.1
• www.dmitrynizh.com/tubeparams_image.htm
• Plate Curves image file: 45 Sylvania curves 2.jpg
• Data source link:
• Curves from Sylvania 45 current:29.98 mA, reference:36.00 mA, percent:83.3%* Traced with eTracer and model developed by Ale Moglia (c) for personal use only

*
* valves@bartola.co.uk www.bartola.co.uk/valves
*
* Capacitances from 45 RCA datasheet
*----------------------------------------------------------------------------------
.SUBCKT DHT_45 1 2 3 4; P G K1 K2

• PARAMS: CCG=4P CGP=7P CCP=3P RFIL=1.67
• MU=3.612 KG1=4350 KP=47 KVB=66 VCT=-2.026 EX=1.4 RGI=2000

• Vp_MAX=400 Ip_MAX=80 Vg_step=10 Vg_start=10 Vg_count=12
• Rp=4000 Vg_ac=55 P_max=10 Vg_qui=-48 Vp_qui=300
• X_MIN=101 Y_MIN=42 X_SIZE=609 Y_SIZE=586 FSZ_X=1165 FSZ_Y=751 XYGrid=false
• showLoadLine=n showIp=y isDHT=y isPP=n isAsymPP=n showDissipLimit=y
• showIg1=n gridLevel2=n isInputSnapped=n
• XYProjections=n harmonicPlot=n dissipPlot=n

*----------------------------------------------------------------------------------
RFIL_LEFT 3 31 {RFIL/4}
RFIL_RIGHT 4 41 {RFIL/4}
RFIL_MIDDLE1 31 34 {RFIL/4}
RFIL_MIDDLE2 34 41 {RFIL/4}
E11 32 0 VALUE={V(1,31)/KP*LOG(1+EXP(KP*(1/MU+V(2,31)/SQRT(KVB+V(1,31)*V(1,31)))))}
E12 42 0 VALUE={V(1,41)/KP*LOG(1+EXP(KP*(1/MU+V(2,41)/SQRT(KVB+V(1,41)*V(1,41)))))}
RE11 32 0 1G
RE12 42 0 1G
G11 1 31 VALUE={(PWR(V(32),EX)+PWRS(V(32),EX))/(2*KG1)}
G12 1 41 VALUE={(PWR(V(42),EX)+PWRS(V(42),EX))/(2*KG1)}
RCP1 1 34 1G
C1 2 34 {CCG} ; CATHODE-GRID
C2 2 1 {CGP} ; GRID=PLATE
C3 1 34 {CCP} ; CATHODE-PLATE
D3 5 3 DX ; FOR GRID CURRENT
D4 6 4 DX ; FOR GRID CURRENT
RG1 2 5 {2*RGI} ; FOR GRID CURRENT
RG2 2 6 {2*RGI} ; FOR GRID CURRENT
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS
*$

 

[supernut]

Thank you very much

 

[Ray Waters]

Here is the Ayumi model for the 45 tube.

*
* Generic triode model: 45
* Copyright 2003--2008 by Ayumi Nakabayashi, All rights reserved.
* Version 3.10, Generated on Sat Mar  8 22:41:31 2008
*          Plate
*          | Grid
*          | | Cathode
*          | | |
.SUBCKT 45 A G K
BGG   GG   0 V=V(G,K)+-0.36938318
BM1   M1   0 V=(0.072484305*(URAMP(V(A,K))+1e-10))**-0.45086063
BM2   M2   0 V=(0.76889142*(URAMP(V(GG)+URAMP(V(A,K))/3.1883948)+1e-10))**1.9508606
BP    P    0 V=0.00046886056*(URAMP(V(GG)+URAMP(V(A,K))/4.1467426)+1e-10)**1.5
BIK   IK   0 V=U(V(GG))*V(P)+(1-U(V(GG)))*0.00027269199*V(M1)*V(M2)
BIG   IG   0 V=0.00023443028*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)-(0.00041387828*URAMP(V(A,K))**1.5)))+1e-10*V(A,K)
BIGK  G    K I=V(IG)
* CAPS
CGA   G    A 7p
CGK   G    K 4p
CAK   A    K 3p
.ENDS

 

[supernut]

Oh thank you very much