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Old 31st December 2011, 05:15 AM   #11
EUVL is offline EUVL  Europe
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Maybe you know the secret pf circuit design better than I do .....




Happy New Year,
Patrick
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Old 31st December 2011, 07:55 AM   #12
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by VladimirK View Post
My practice nowdays is to judge about schematics only after prototyping and listening, in comparison with best reference components available to me. Such approach makes the process very slow, but the conclusions obtained are very reliable.
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Originally Posted by EUVL View Post
Maybe you know the secret pf circuit design better than I do .....
Of course I can build all the published schematics in this site, but I don't want to. You know that we don't have time for that mission

If you have to build amps, I believe you will do something to simplify the process of choosing the candidates. Simple process is to choose proven circuits that have been favored by many, or better, experienced builders.

If somebody build the new amp and swear that it is better sounding than the Fetzilla for example, of course I will build it, no doubt about it. But I have to say that my process of choosing the candidate has been proven to be accurate and useful
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Old 1st February 2012, 11:50 AM   #13
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Hey Patrick,
Posted this in another thread but maybe this is a better place.

Quote:
Have looked into this before and going without output cap feels a little risky.

But if one added a simple servo from the output to steer the single FET CCS of the input FET we might be safe. Have done a few simple sims and it should work.

Have you consider siomething a little more hefty as driver? I have tried with IRF510 and 610 models and they seem to work well.
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Old 4th February 2012, 12:54 PM   #14
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This is my basic idea to keep astable 0V at the output.
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Old 6th August 2012, 03:10 AM   #15
JZatopa is offline JZatopa  United States
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Any reason I couldn't just swap the 240's for semisouth power jfets to make this a J(FET)-LH amplifier?
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Old 30th September 2013, 05:06 AM   #16
EUVL is offline EUVL  Europe
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After a delay of a year and a half, the prototype is finally finished.

Works first time with no bugs. Sounds gorgeous.
Outstanding bass control and very smooth highs for such a hig bandwidth design.

The real circuit is of course more sophisticated than that in Post #1.
We'll publish eventually after another round of refinements.




Patrick
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Old 30th September 2013, 05:10 AM   #17
EUVL is offline EUVL  Europe
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Pictures of the PCB.


Patrick
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Old 30th September 2013, 06:05 AM   #18
kimbo is offline kimbo  Australia
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That's really interesting EUVL......always been a JLH fan so I'm really looking forward to more details
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Old 30th September 2013, 06:40 AM   #19
EUVL is offline EUVL  Europe
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Here is a teaser. Not final version.


Patrick
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