tubecad and tubecad se

Nikon1975 · 24th January 2010, 11:42 AM

Dear All,

Do you have/use any program from tubecad ? They look interesting, but the description is so convoluted that it's not clear what they do and what they don't do.

Any experience ? Are they worth the money ?

Best Regards,

Davide

DougL · 24th January 2010, 06:49 PM

I have them and recomend them highly.
Bottom line, they are designed to model 1 stage at a time.

If you give me an example project, I could provide a few screen shots.

Doug

Cassiel · 24th January 2010, 11:15 PM

I use both. Tubecad great for preamp stages. SE Cad is for power triodes in SE. Most tube types are there but SE Cad doesn't allow me to add new tubes to the library. I like to play with 6sn7 and others small tubes for SE outputs.

Good programs, worth the money if you need them.

Nikon1975 · 25th January 2010, 03:54 AM

I am playing now with KT88 amp. I did the one with 6n1p and kt88 and the simpleSE from tubelab. I'd like to optimize cathode resistance, B+, and load to have minimum distorsion. The optimum would be to have a FTT Analyser, but it's far too expensive.
At the moment I have the standard configuration Cathode 560 ohm, B+ 422, load 5000ohm.

Does tubecad estimate distorsion ?

Thanks,

Davide

DougL · 25th January 2010, 04:21 AM

TubeCad SE does estimate distortion.

DougL · 25th January 2010, 04:30 AM

Here is a run with it at near maximum input.
Note that it took less than 5 min to do.

Doug

Troncones · 26th January 2010, 06:37 PM

In the description of TubeCad SE it says it's for Triodes. The KT88 is a Pentode. How does it address using Pentodes?

DougL · 26th January 2010, 06:56 PM

It addresses Triode connected Pentodes only.

24th January 2010, 11:42 AM	#1
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	tubecad and tubecad se Dear All, Do you have/use any program from tubecad ? They look interesting, but the description is so convoluted that it's not clear what they do and what they don't do. Any experience ? Are they worth the money ? Best Regards, Davide

24th January 2010, 06:49 PM	#2
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	I have them and recomend them highly. Bottom line, they are designed to model 1 stage at a time. If you give me an example project, I could provide a few screen shots. Doug __________________ Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus

24th January 2010, 11:15 PM	#3
Cassiel diyAudio Member Join Date: Sep 2004 Location: Madrid	I use both. Tubecad great for preamp stages. SE Cad is for power triodes in SE. Most tube types are there but SE Cad doesn't allow me to add new tubes to the library. I like to play with 6sn7 and others small tubes for SE outputs. Good programs, worth the money if you need them. __________________ Good sound comes and goes.

25th January 2010, 04:21 AM	#5
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	TubeCad SE does estimate distortion. __________________ Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus

26th January 2010, 06:56 PM	#8
DougL diyAudio Member Join Date: Feb 2004 Location: Wheaton IL. Blog Entries: 25	It addresses Triode connected Pentodes only. __________________ Scienta sine ars nihil est - Science without Art is nothing. (Implies the converse as well) Mater tua criceta fuit, et pater tuo redoluit bacarum sambucus

25th January 2010, 03:54 AM	#4
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	I am playing now with KT88 amp. I did the one with 6n1p and kt88 and the simpleSE from tubelab. I'd like to optimize cathode resistance, B+, and load to have minimum distorsion. The optimum would be to have a FTT Analyser, but it's far too expensive. At the moment I have the standard configuration Cathode 560 ohm, B+ 422, load 5000ohm. Does tubecad estimate distorsion ? Thanks, Davide

26th January 2010, 06:37 PM	#7
Troncones diyAudio Member Join Date: Dec 2009 Location: Orange County, California.	In the description of TubeCad SE it says it's for Triodes. The KT88 is a Pentode. How does it address using Pentodes?

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