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Vacuum Tube SPICE Models
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Old 13th November 2018, 03:23 PM   #1831
Koonw is online now Koonw
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Quote:
Originally Posted by EL8 View Post
Hi, I'm looking for a model for RES964
Thanks
Don't find sufficient data for RES964, use close substitute E443H instead.


Code:
**** E443H ******************************************
* Created on 11/13/2018 23:18 using paint_kip.jar
* www.dmitrynizh.com/tubeparams_image.htm
* Plate Curves image file: e443h.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT E443H P G2 G K ; LTSpice tetrode.asy pinout
* .SUBCKT E443H P G K G2 ; Koren Pentode Pspice pinout
+ PARAMS: MU=8.001 KG1=3737.41 KP=51.11 KVB=10.8 VCT=0 EX=1.338 KG2=11692.8 KNEE=23.63 KVC=1.619
+ KLAM=1.08E-7 KLAMG=3.587E-4   KNK=-0.044 KNG=0.006 KNPL=50 KNSL=11 KNPR=120 KNSR=29
+ CCG=3P CGP=1.4P CCP=1.9P RGI=2000.0
* Vp_MAX=550 Ip_MAX=80 Vg_step=2 Vg_start=0 Vg_count=17
* X_MIN=41 Y_MIN=45 X_SIZE=976 Y_SIZE=716 FSZ_X=1550 FSZ_Y=878 XYGrid=false
* Rp=1400 Vg_ac=20 P_max=9 Vg_qui=-16 Vp_qui=300 
* showLoadLine=n showIp=y isDHP=n isPP=n isAsymPP=n isUL=n showDissipLimit=y 
* showIg1=n isInputSnapped=y addLocalNFB=n
* XYProjections=n harmonicPlot=y dissipPlot=n 
* UL=0.43 EG2=250 gridLevel2=n addKink=y isTanhKnee=n advSigmoid=n 
*----------------------------------------------------------------------------------
RE1  7 0  1G    ; DUMMY SO NODE 7 HAS 2 CONNECTIONS
E1   7 0  VALUE=  ; E1 BREAKS UP LONG EQUATION FOR G1.
+{V(G2,K)/KP*LOG(1+EXP((1/MU+(VCT+V(G,K))/SQRT(KVB+V(G2,K)*V(G2,K)))*KP))}
RE2  6 0  1G    ; DUMMY SO NODE 6 HAS 2 CONNECTIONS
E2  6 0  VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))} ; Kg1 times KIT current
RE21 21 0 1
E21  21 0 VALUE={V(6)/KG1*ATAN(V(P,K)/KNEE)} ; Ip with knee but no slope and no kink
RE22 22 0 1 ; E22: kink curr deviation for plate
E22  22 0 VALUE={V(21)*LIMIT(KNK-V(G,K)*KNG,0,0.3)*(-ATAN((V(P,K)-KNPL)/KNSL)+ATAN((V(P,K)-KNPR)/KNSR))} 
G1   P  K  VALUE={V(21)*(1+KLAMG*V(P,K))+KLAM*V(P,K) + V(22)}
* Alexander Gurskii screen current, see audioXpress 2/2011, with slope and kink added
RE43 43 K 1G ; Dummy
E43  43 G2 VALUE={0} ; Dummy
G2   43 K  VALUE={V(6)/KG2*(KVC-ATAN(V(P,K)/KNEE))/(1+KLAMG*V(P,K))-V(22)}
RCP  P K  1G     ; FOR CONVERGENCE
C1   K G  {CCG}  ; CATHODE-GRID 1
C2   G P  {CGP}  ; GRID 1-PLATE
C3   K P  {CCP}  ; CATHODE-PLATE
R1   G 5  {RGI}  ; FOR GRID CURRENT   
D3   5 K  DX     ; FOR GRID CURRENT } 
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N)
.ENDS
*$

 
* The following triode model is derived from pentode model, see above.
* In the triode model, all spice parameters come directly from the pentode model, except for Kg1,
* which for triode-strapped pentodes is derived from pentode's Kg1, Kg2 and Kvc as
*
*    4Kg1Kg2 / ((2Kvc-Pi)(2Kg1+PiKg2))

**** E443H ******************************************
* Created on 11/13/2018 23:18 using paint_kit.jar 4.7 
* www.dmitrynizh.com/tubeparams_image.htm
* Plate Curves image file: e443h.png
* Data source link: <plate curves URL>
*----------------------------------------------------------------------------------
.SUBCKT TRIODE_E443H 1 2 3 ; Plate Grid Cathode
+ PARAMS: CCG=3P  CGP=1.4P CCP=1.9P RGI=2000
+ MU=8.001 KG1=41016.82 KP=51.11 KVB=10.8 VCT=0 EX=1.338 
* Vp_MAX=550 Ip_MAX=80 Vg_step=2 Vg_start=0 Vg_count=17
* Rp=1400 Vg_ac=20 P_max=9 Vg_qui=-16 Vp_qui=300
* X_MIN=41 Y_MIN=45 X_SIZE=976 Y_SIZE=716 FSZ_X=1550 FSZ_Y=878 XYGrid=false
* showLoadLine=n showIp=y isDHT=n isPP=n isAsymPP=n showDissipLimit=y 
* showIg1=n gridLevel2=n isInputSnapped=y  
* XYProjections=n harmonicPlot=y dissipPlot=n 
*----------------------------------------------------------------------------------
E1 7 0 VALUE={V(1,3)/KP*LOG(1+EXP(KP*(1/MU+(VCT+V(2,3))/SQRT(KVB+V(1,3)*V(1,3)))))} 
RE1 7 0 1G  ; TO AVOID FLOATING NODES
G1 1 3 VALUE={(PWR(V(7),EX)+PWRS(V(7),EX))/KG1} 
RCP 1 3 1G   ; TO AVOID FLOATING NODES
C1 2 3 {CCG} ; CATHODE-GRID 
C2 2 1 {CGP} ; GRID=PLATE 
C3 1 3 {CCP} ; CATHODE-PLATE 
D3 5 3 DX ; POSITIVE GRID CURRENT 
R1 2 5 {RGI} ; POSITIVE GRID CURRENT 
.MODEL DX D(IS=1N RS=1 CJO=10PF TT=1N) 
.ENDS 
*$
Attached Images
File Type: png E443H paint.png (453.4 KB, 59 views)
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Old 13th November 2018, 08:39 PM   #1832
popilin is offline popilin  Argentina
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Hi everyone

I am looking for a model of Electro Harmonix 6922.

It is said out there that the 6N23P is the same, but the only model available is inaccurate, its iv curves are more like Siemens E88CC/6922.

Thanks in advance.
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Old Yesterday, 12:12 AM   #1833
cogsncogs is offline cogsncogs  United States
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I made model from a set of curves that are supposedly for a 6922EH that compare to a set for for a 6N23P that I have. Who knows...

I made a comparison in LTspice in the image below.
U1 = Philips E88CC
U2 = Supposed 6922EH
U3 = 6N23P from Soviet data sheet.
Code:
* 6922EH LTSpice model
* Modified Koren model (8 parameters) mean fit error 0.20198mA
* Traced by Wayne Clay on 05/29/2016 using Curve Captor v0.9.1
* and Engauge Digitizer
.subckt 6922EH  P G K
    Bp  P K  I=
+ (0.08061132734m)*uramp(V(P,K)*ln(1.0+(-0.03708608981)+exp((3.87608812)+
+ (3.87608812)*((31.88733765)+(-1070.482271m)*V(G,K))*V(G,K)/sqrt((22.6657093)**2+
+ (V(P,K)-(4.717434742))**2)))/(3.87608812))**(1.322643185)
    Cgp G P 2.2p ; 0.7p added (1.5p)
    Cgk G K 4.2p ; 0.7p added (3.5p)
    Cpk P K 2.2p ; 0.2p added (2.0p)
    Rpk P K 1G ; to avoid floating nodes
    d3  G K dx1
.model dx1 d(is=1n rs=2k cjo=1pf N=1.5 tt=1n)
.ends 6922EH
Code:
* ============================================================== 
* 6N23P LTSpice model 
* Modified Koren model (8 parameters): mean fit error 0.182649mA 
* Traced by Wayne Clay on 08/22/2018 using Curve Captor v0.9.1 
* and Engauge Digitizer from Soviet data sheet 
* ============================================================== 
.subckt 6N23P  P G K 
    Bp  P K  I= 
+ (0.09199263401m)*uramp(V(P,K)*ln(1.0+(-0.04545642112)+exp((4.06290859)+ 
+ (4.06290859)*((30.26769611)+(-1093.389027m)*V(G,K))*V(G,K)/sqrt((29.02430003)**2+ 
+ (V(P,K)-(11.49369847))**2)))/(4.06290859))**(1.290098711) 
    Cgp G P 2.3p ; 0.7p added (1.6p) 
    Cgk G K 4.3p ; 0.7p added (3.6p) 
    Cpk P K 2.3p ; 0.2p added (2.1p) 
    Rpk P K 1.0G ; to avoid floating nodes in mu-follower 
    d3  G K dx1 
.model dx1 d(is=1n rs=2k cjo=1pf N=1.5 tt=1n) 
.ends 6N23P
Attached Images
File Type: png 6922EH_CC.png (33.5 KB, 45 views)
File Type: png 6922_compare.png (47.5 KB, 45 views)
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Old Yesterday, 01:19 AM   #1834
popilin is offline popilin  Argentina
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Hi Wayne! You are still the master!

Thanks a lot!
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Old Yesterday, 04:04 AM   #1835
Koonw is online now Koonw
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Join Date: Apr 2013
Quote:
I made model from a set of curves that are supposedly for a 6922EH that compare to a set for for a 6N23P that I have.
I compared the actual 6N23p with supposed 6922eh you attached, is it close, esp. towards the end. But I still think 6922eh plot is derived from the original 6N23p curve which looks so much alike but actually has much differences. Electroharmonix provides 6922eh datasheet with data only no curve plots at all (that I can find). So one must plot the 6922eh curve to see the real differences!!
Attached Images
File Type: png 6922eh 6n23p compared.png (448.2 KB, 32 views)

Last edited by Koonw; Yesterday at 04:30 AM.
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Old Yesterday, 02:42 PM   #1836
popilin is offline popilin  Argentina
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Both models are very close, maybe the 6922EH is based on the 6N23P or is the same valve.

The 6N23P model from post#1833 is far better than the one available on Russian forums.
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