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trioderizer

Started by rodriki1, October 06, 2009, 03:53:51 PM

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rodriki1

October 06, 2009, 03:53:51 PM

take a look

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


I am not looking for trouble...
just a funny curious thing.
my regards

Cliff Schecht

#1
October 06, 2009, 04:03:33 PM
Very cool!!

I need to find myself a curve tracer :D.

Ripthorn

#2
October 06, 2009, 05:05:14 PM
The trioderizer sounds like a hygiene product gone horribly wrong... :icon_biggrin:
Exact science is not an exact science - Nikola Tesla in The Prestige
https://scientificguitarist.wixsite.com/home

Brymus

#3
October 06, 2009, 09:26:18 PM
If you read to the end he recomends a mosfet from Mouser LND150 as a drop in replacement (sort of) for a 12AX7
stating its 500V rating,using his triodorizer.
I would like to here what the guys who know this stuff think about his approach.
It looks pretty similiar to what the people here have done with jfets with the trimmer on the source.
I'm no EE or even a tech,just a monkey with a soldering iron that can read,and follow instructions. ;D
My now defunct band http://www.facebook.com/TheZedLeppelinExperience

R.G.

#4
October 06, 2009, 10:34:48 PM
I can't get the page to open, but is it like the used in Mosfet Follies?

I use smaller MOSFETs than the IRF820 these days, as Zetex and Supertex have 500V devices in a TO92.

How they ...sound... is a different matter.
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

Rob Strand

#5
October 07, 2009, 03:31:08 AM
Aron's Dumble overdrive actually uses this already.   (The Dumble actually triodizes triodes - it's just negative feedback!)

Send:     . .- .-. - .... / - --- / --. --- .-. -
According to the water analogy of electricity, transistor leakage is caused by holes.

R.G.

#7
October 07, 2009, 09:30:24 AM
Nope, different approach. Cool!
R.G.

In response to the questions in the forum - PCB Layout for Musical Effects is available from The Book Patch. Search "PCB Layout" and it ought to appear.

puretube

#8
October 09, 2009, 01:38:03 PM
[How to] roll your own "Tube-like" FET...

Brymus

#9
October 09, 2009, 02:58:38 PM
I am guessing that no manufacturer ever produced these new type of FETs.
Still quite interesting...
I'm no EE or even a tech,just a monkey with a soldering iron that can read,and follow instructions. ;D
My now defunct band http://www.facebook.com/TheZedLeppelinExperience

amptramp

#10
October 10, 2009, 10:10:45 PM
The problem with a FET is that the interelectrode capacitances are much higher than tube capacitances and more importantly, they vary with voltage.  This works in a near-DC situation like a curve tracer but you would need large varactor diodes with varying voltages across them to counteract the effects at higher (but still audio) frequencies.  If you are operating at much more than small signal levels, the power needed to drive these external varactor capacitances would be large.

GibsonGM

#11
October 11, 2009, 06:31:56 PM
I wonder how this works with respect to grid current limiting?  In a guitar situation, the impedance change in a tube occurs gradually, while in a FET or BJT, it is a sudden onset, thereby offering only 1 "type" of grid current overdrive.  So I guess the triode will live to fight another day!  Neat concept, though, a really useful study!
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puretube

#12
November 13, 2009, 06:55:15 PM
Anybody cross-reading?

Cliff Schecht

#13
November 13, 2009, 07:27:35 PM
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