The real solid state simulation of triode.

[ubaid88]

You may have seen this. This is an article about Triode simulation by Dimitri Danyuk. It is very complex. Very few may understand this. But if we work on this out then may get much closer to tube sound. Even better than just fets.
Download this pdf file.
Triode Simulator
http://www.2shared.com/file/9070309/77caa019/6008.html

[Cliff Schecht]

Very cool article and well presented. Not over my head either .

[ubaid88]

same here. That is why i posted here.

[teemuk]

Seems awfully complex for the job. You can shape the transfer curve of a FET to resemble that of a triode simply by adding negative feedback from drain to gate. All you need for that is a single resistor. 

Nevertheless, it's a cool article that I've been hunting for a while. Thanks for sharing.

[ubaid88]

anyway i give. I better buy a tube

[slideman82]

You can shape the transfer curve of a FET to resemble that of a triode simply by adding negative feedback from drain to gate.

This is a really cool tip I'm gonna try for sure!

[CynicalMan]

You can shape the transfer curve of a FET to resemble that of a triode simply by adding negative feedback from drain to gate.

This is a really cool tip I'm gonna try for sure!

Check out http://www.radiomuseum.org/forum/the_trioderizer_a_solid_state_triode.html

[ubaid88]

thanks CynicalMan.

This is atleast possible for us to try.

[ubaid88]

another link from same page.

http://www.radiomuseum.org/forum/roehrenersatz_durch_transistoren.html

But this is German.

[morcey2]

O.H. Schade did something similar with output pentodes/beam-tetrodes around 1938. 

http://www.clarisonus.com/Archives/TubeTheory/Schade%201938%20Beam%20Power%20Tubes.pdf

It starts on page 40 of the PDF, Page 359 in the book.  It retains the power of the pentode, but gives the output characteristics of a triode.   

Matt

[puretube]

Anybody cross-reading?

[frequencycentral]

Anybody cross-reading?

...................hahaha!

[Cliff Schecht]

Anybody cross-reading?

Perhaps?

[morcey2]

Anybody cross-reading?

Perhaps?

Nah.  Just cross-dressing.  It's Friday night after all.

[DougH]

anyway i give. I better buy a tube

Pretty much my reaction to this kind of stuff.

For 'tube sound" I build stuff with..
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.
.
.
.
wait for it...
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tubes...

[Ripthorn]

anyway i give. I better buy a tube

Pretty much my reaction to this kind of stuff.

For 'tube sound" I build stuff with..
.
.
.
.
.
.
.
wait for it...
.
.
.
.
.
tubes...

Amen.  All it takes to emulate tube sound with those is a single component (in terms of mimicking just the triode).  I'm hooked, tubes are good at that.

[dimitri]

There are several typos in the paper, which don't affect final result. I can present errata for the math lovers.
No, the circuit in the paper is not the real solid state simulation of triode, it emulates soft nonlinearity. For real emulation grid current should be taken in consideration.
Yes, this is correct that tubes give best tube sound, but there is reliability question. Another issue is reproducibility (usially there are no voltage regulators in tube amps, and mains can be far away from 120V and from sine because of lighting) 

[Paul Marossy]

As I have always said, there is nothing better than the real thing. I guess some people are satisfied with an imitation of the real thing. But I can always tell when I'm eating some kind of sugar-free fat-free thing, it just tastes fake. 

Not bashing emulations in general, some of them sound really good when recorded direct. But I don't care for them for live use, I'd much rather have the real deal.

[opacheco]

There are several typos in the paper, which don't affect final result. I can present errata for the math lovers.
No, the circuit in the paper is not the real solid state simulation of triode, it emulates soft nonlinearity. For real emulation grid current should be taken in consideration.
Yes, this is correct that tubes give best tube sound, but there is reliability question. Another issue is reproducibility (usially there are no voltage regulators in tube amps, and mains can be far away from 120V and from sine because of lighting) 

dimitri, do you have more information about this??....I found some math errors in that paper too and I would like to know how you did in order to evaluate the "n" exponent because in that paper is no clear how you did use the derivation for that!...Is that a solve tracendentals equation?

Thanks a lot
Opacheco.