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6th October 2017, 07:10 PM  #1501 
diyAudio Member
Join Date: May 2006

My secret weapon is the 6GU7
* penta6GU7 LTSpice model * Modified Koren model (8 parameters): * Traced by erik 25/12/2013 using Curve Captor v0.9.1 * from PENTAVAC TESTER * penta6GU7 LTSpice model .subckt penta6GU7 P G K Bp P K I=(0.06530968005m)*uramp(V(P,K)*ln(1.0+(0.05276936784)+exp((2.050356028)+(2.050356028)*((2 9.00542735)+(88.26359513m)*V(G,K))*V(G,K)/sqrt((30.90804259)**2+(V(P,K)(3.024929248))**2)))/(2.050356028))**(1.285895446) Cgk G K 0.6p ; 0.2p added Cpk P K 3.9p ; 0.5p added Cgp G P 3.5p ; 0.5p added 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 penta6GU7 
11th October 2017, 06:05 PM  #1502 
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Join Date: May 2006

My pair of Emission Labs 300B compared with Western Electric 300B datasheet curves
And thespice model. * TML300b LTSpice model corrected by 1/2 heater volt * Modified Koren model (8 parameters): mean fit error 0,8mA * Traced by erik 25/12/2013 using Curve Captor v0.9.1 * pentaTJ300B LTSpice model * pentaEML300b LTSpice model .subckt pentaEML300b P G K Bp P K I=(0.1471360425m)*uramp(V(P,K)*ln(1.0+(0.0836812242)+exp((14.77238937)+(14.77238937)*((4. 010010839)+(0.03955144628m)*V(G,K))*V(G,K)/sqrt((2.786333203e006)**2+(V(P,K)(2.303526987))**2)))/(14.77238937))**(1.48386058) Cgk G K 8.5p ; 0.2p added Cpk P K 4.6p ; 0.5p added Cgp G P 15.5p ; 0.5p added 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 pentaEML300b 
12th October 2017, 11:21 AM  #1503 
diyAudio Member


12th October 2017, 02:51 PM  #1504 
diyAudio Moderator

Make sure there is no space in the Bp line.

12th October 2017, 04:33 PM  #1505 
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Join Date: May 2006


12th October 2017, 09:57 PM  #1506  
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Join Date: Jul 2003
Location: Wayne, West Virginia

Quote:
Like this: Code:
* TML300b LTSpice model corrected by 1/2 heater volt * Modified Koren model (8 parameters): mean fit error 0,8mA * Traced by erik 25/12/2013 using Curve Captor v0.9.1 * pentaTJ300B LTSpice model * pentaEML300b LTSpice model .subckt pentaEML300b P G K Bp P K I=(0.1471360425m)*uramp(V(P,K)*ln(1.0+(0.0836812242)+exp((14.77238937)+(14.77238937)*((4. 010010839)+(0.03955144628m)*V(G,K))*V(G,K)/sqrt((2.786333203e006)**2+(V(P,K)(2.303526987))**2)))/(14.77238937))**(1.48386058) Cgk G K 8.5p ; 0.2p added Cpk P K 4.6p ; 0.5p added Cgp G P 15.5p ; 0.5p added 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 pentaEML300b
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19th October 2017, 04:16 PM  #1507 
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Join Date: May 2011
Location: Virginia

12K5 and 12U7?
Hello, I did a search and could not find spice models for tube types 12K5 and 12U7. Anyone know of one for each of these? Thanks.
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19th October 2017, 05:57 PM  #1508 
diyAudio Member
Join Date: Jul 2003
Location: Wayne, West Virginia

12U7 LTspice model
Here's a 12U7 model fresh from the oven. I don't have one for the 12K5. I'm assuming you need an LTspice model.
Code:
* ============================================================== * 12U7 LTSpice model * Modified Koren model (8 parameters): mean fit error 0.0424612mA * Traced by Wayne Clay on 10/19/2017 using Curve Captor v0.9.1 and * Engauge Digitizer from Sylvania datasheet .subckt 12U7 P G K Bp P K I= + (0.02785936343m)*uramp(V(P,K)*ln(1.0+(0.004710347468)+exp((0.5642928568)+ + (0.5642928568)*((47.72916363)+(6781.211301m)*V(G,K))*V(G,K)/sqrt((16.01863303)**2+ + (V(P,K)(6.398929653))**2)))/(0.5642928568))**(1.155518036) Cgp G P 2.2p ; 0.7p added (1.5p) Cgk G K 2.3p ; 0.7p added (1.6p) Cpk P K 0.6p ; 0.2p added (0.4p) 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 12U7
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19th October 2017, 06:06 PM  #1509 
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Join Date: May 2011
Location: Virginia

Oh man! thanks so much! Looking forward to the 12K5 model.
I use Tina. Best Regards, Dirk
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19th October 2017, 06:43 PM  #1510  
diyAudio Member
Join Date: Jul 2003
Location: Wayne, West Virginia

12U7 model for Tina
Quote:
Code:
* * 12U7 Spice 3F4 Tina model * Modified Koren model (8 parameters): mean fit error 0.0424612mA * Traced by Wayne Clay on 10/19/2017 using Curve Captor v0.9.1 and * Engauge Digitizer from Sylvania datasheet * Plate *  Grid *   Cathode *    .subckt 12U7 P G K Bp P K I= + (0.02785936343m)*uramp(V(P,K)*ln(1.0+(0.004710347468)+exp((0.5642928568)+ + (0.5642928568)*((47.72916363)+(6781.211301m)*V(G,K))*V(G,K)/sqrt((16.01863303)^2+ + (V(P,K)(6.398929653))^2)))/(0.5642928568))^(1.155518036) Cgp G P 2.2p ; 0.7p added (1.5p) Cgk G K 2.3p ; 0.7p added (1.6p) Cpk P K 0.6p ; 0.2p added (0.4p) 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 12U7
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Sent from my Linux desktop computer using a keyboard and a mouse. Last edited by cogsncogs; 19th October 2017 at 07:03 PM. Reason: Goofed up 

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