new thread
That will certainly help, though much depends on who's name is associated with the title and the content.
A good example is this thread: http://www.diyaudio.com/forums/showthread.php?p=1109233
That will certainly help, though much depends on who's name is associated with the title and the content.
A good example is this thread: http://www.diyaudio.com/forums/showthread.php?p=1109233
Look at this post, and in two posts later from courage (i.e. without cascoding the JFets to protect them from too high voltages and/or power dissipation)
http://www.diyaudio.com/forums/showthread.php?p=873606
Ciao, Tino
http://www.diyaudio.com/forums/showthread.php?p=873606
Ciao, Tino
I think a new sticky thread like "Solid State Design Principles" should be started by a moderator.I will certainly contribute, time permitting.
This thread has to die, its a waste of time, database space and electrons/holes required to post. JC would be of course welcomed in the new thread, but shouldn't expect any special treatment.
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I did copy it from the original post, and for me it doesn't expand either. It is better to use the link provided by Zinsula:
http://www.diyaudio.com/forums/showthread.php?p=873606
jd
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) will continue to contribute here. 
PMA, why don't you put your version of BT like schematic, up? What I was hoping for is a comparison of the folded cascode vs the non-folded cascode (2 stage) 4 quadrant topology in a relatively simple form to discuss how to make each one better. I think that it might be refreshing to have some engineering discussed relative to these topologies.
It is the heart of the CTC Blowtorch, vs the non-cascode being the heart of the JC-80 preamp that somebody is making some circuit boards for, somewhere. Or the double cascode 2 stage 4 quadrant, topology that is the heart of the Parasound JC-2, can be compared to the CTC 4 quadrant folded cascode.
Then the only criticisms will be of the circuits related to the same designer, not others who might not want a comparison made on this thread.
Of course, I invite your improvements, as well as Charles Hansen's (of Ayre) as you both have extensive design experience with this set of topologies.
It would be refreshing to get back to the Blowtorch and its relatives.
It is the heart of the CTC Blowtorch, vs the non-cascode being the heart of the JC-80 preamp that somebody is making some circuit boards for, somewhere. Or the double cascode 2 stage 4 quadrant, topology that is the heart of the Parasound JC-2, can be compared to the CTC 4 quadrant folded cascode.
Then the only criticisms will be of the circuits related to the same designer, not others who might not want a comparison made on this thread.
Of course, I invite your improvements, as well as Charles Hansen's (of Ayre) as you both have extensive design experience with this set of topologies.
It would be refreshing to get back to the Blowtorch and its relatives.
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Thanks for pointing this out.
This thread is technically useless to anybody but snake oil merchands, looking for ways to promote their crap, and people looking for cheap entertainment (including myself).
One alternative to a new thread is to drop by occasionally and trash, within the moderation limits, all the technical ** for the benefit of the sane people, looking to get something useful out of this mess. Based on the reactions that I usually get, I guess I'm pretty good at that.
Zinzula, if you send me (jan at linearaudio dot nl) the original I'll put it up on my website for download. (Actually it is the attachement of post 677 in the BT part 1 thread)
John, this again will lead nowhere. I know, in a few postst you will again complain that people don't follow your advice and go off topic, but its predictable.
IF you are interested in discussing a circuit, pick one and stick to it. We'll help to put it up.
But if you keep wandering around, how can WE keep OT??
jd
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