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Old 24th February 2013, 09:33 PM   #111
NicMac is offline NicMac  Italy
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Originally Posted by EUVL View Post
Here a few pictures of the latest CCS version.
In: "going all the way", nobody beats you Patrick!
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Old 24th February 2013, 10:37 PM   #112
tvrgeek is offline tvrgeek  United States
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Maybe more grasping at straws for something in topology that relates to perceived sound quality. I had not heard a reason I am off the cliff on this. Good point, parastatics may swamp it. That's as good a reason as any. Might that suggest the ubiquitous BJT/LED is good enough for most standard applications.
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Old 25th February 2013, 03:42 AM   #113
EUVL is offline EUVL  Europe
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Your heat spreaders and special heat sinks will be on their way this week.
Will email you for details in the next few days.

But all to no vale, since it seems I still need the servo in the end.

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Old 25th February 2013, 04:11 AM   #114
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Thanks, and yes, why not a servo ?
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Old 25th February 2013, 05:05 AM   #115
EUVL is offline EUVL  Europe
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Added complication, and some people swear they affect the sound .....

So I took the challenge to try to do without.
But as you also said before, doing it for circuits without global feedback is very tricky ....
Apparently the N and the P devices do not track each other very well thermally.

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Old 8th May 2013, 11:59 AM   #116
Nikitas is offline Nikitas  United Kingdom
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any updates?
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Old 8th May 2013, 12:43 PM   #117
EUVL is offline EUVL  Europe
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If you follow other threads I post, you would notice that I have a HAGS module (gain of 4) for the DAO SE headphone amp.

The DAO SE all-FET Class-A ZGF Headphone Amplifier

This has been proven to be DC stable even with gain of 4.
The circuit topology is very similar to that of the XCEN, so that I can see no reason why it cannot be adapted.

So at this moment, we'll finish th ework on the HAGS first before we come back to adapt the results there for the XCEN.

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Old 18th March 2014, 11:56 PM   #118
maxpou is offline maxpou  Canada
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Hi Patrick,
do you worked on this projet?

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