Solid State Guitar Amp Forum | DIY Guitar Amplifiers

Solid State Amplifiers => Preamps and Effects => Topic started by: mensur on March 29, 2010, 05:19:05 AM

Title: JFET Emulation of triode limitation
Post by: mensur on March 29, 2010, 05:19:05 AM
http://amtelectronics.com/support/articles/why_tube-like_cannot_measure_up_to_tube_inside/
http://translate.google.com/translate?js=n&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fwww.sugardas.lt%2F~igoramps%2Farticle68%2Farticle.htm&sl=ru&tl=en
Samples:
Real Mesa Rectifier:Pure-1.mp3 (http://www.fileden.com/files/2008/12/25/2237836/Pure-1.mp3)
AMT R1:Pure-2.mp3 (http://www.fileden.com/files/2008/12/25/2237836/Pure-2.mp3)
Title: Re: JFET Emulation of triode limitation
Post by: rowdy_riemer on March 30, 2010, 03:25:00 PM
The links to the sound clips aren't working.
Title: Re: JFET Emulation of triode limitation
Post by: HENK on March 30, 2010, 03:34:32 PM
3+4 are o.k. on a Mac
Title: Re: JFET Emulation of triode limitation
Post by: mensur on March 30, 2010, 04:28:23 PM
I put working samples.
Title: Re: JFET Emulation of triode limitation
Post by: rowdy_riemer on March 30, 2010, 08:25:28 PM
Thx, dude. I can open those samples just fine.
Title: Re: JFET Emulation of triode limitation
Post by: phatt on April 01, 2010, 10:56:46 AM
Just did some quick simulations.
With or without *diodes* the waveform is identical?

With 100k Drain R's the circuit will be asymetrical anyway, So I don't quite get it.
A tad confusing artical to read.

Also all those pedals have Cabsim inbuilt and judging by the clips at *AMT* those cabsims are in use the whole time. I admit it does sound good.
(JCM 800 very nice)

*mensur*,
can I ask, was there a point to this post?
Have I missed the point? LOL.

IMO Any dist will sound more convincing through a good cabsim.

Having built whole Fet preamp circuits with 3SK30A Fets running from 37VDC I will simply say that there not all they are cracked up to be.

The best use I found for Fets was the mu booster type pedal Which I still use BTW.
Cheers Phil.