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
Very cool article and well presented. Not over my head either :).
same here. That is why i posted here.
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. :icon_lol:
Nevertheless, it's a cool article that I've been hunting for a while. Thanks for sharing.
anyway i give. I better buy a tube :D
Quote from: teemuk on November 11, 2009, 12:38:48 PM
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!
Quote from: slideman82 on November 11, 2009, 07:33:36 PM
Quote from: teemuk on November 11, 2009, 12:38:48 PM
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
thanks CynicalMan.
This is atleast possible for us to try.
another link from same page.
http://www.radiomuseum.org/forum/roehrenersatz_durch_transistoren.html
But this is German.
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
Anybody cross-reading? (http://www.diystompboxes.com/smfforum/index.php?topic=79283.0)
Quote from: puretube on November 13, 2009, 06:58:03 PM
Anybody cross-reading? (http://www.diystompboxes.com/smfforum/index.php?topic=79283.0)
...................hahaha!
Quote from: puretube on November 13, 2009, 06:58:03 PM
Anybody cross-reading? (http://www.diystompboxes.com/smfforum/index.php?topic=79283.0)
Perhaps?
Quote from: Cliff Schecht on November 13, 2009, 07:27:53 PM
Quote from: puretube on November 13, 2009, 06:58:03 PM
Anybody cross-reading? (http://www.diystompboxes.com/smfforum/index.php?topic=79283.0)
Perhaps?
Nah. Just cross-dressing. It's Friday night after all.
Quote from: ubaid88 on November 11, 2009, 01:02:52 PM
anyway i give. I better buy a tube :D
Pretty much my reaction to this kind of stuff.
For 'tube sound" I build stuff with..
.
.
.
.
.
.
.
wait for it...
.
.
.
.
.
tubes...
Quote from: DougH on November 13, 2009, 10:08:08 PM
Quote from: ubaid88 on November 11, 2009, 01:02:52 PM
anyway i give. I better buy a tube :D
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.
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)
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. :icon_wink:
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.
Quote from: dimitri on March 02, 2010, 11:11:15 AM
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.