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Old 14th March 2013, 12:18 PM   #8521
Joachim Gerhard is offline Joachim Gerhard  Germany
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wintermute, understood, back to business.
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Old 14th March 2013, 12:18 PM   #8522
buzzforb is offline buzzforb  United States
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All I needed. Thank you very much, Joachim, for everything.
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Old 14th March 2013, 12:22 PM   #8523
Joachim Gerhard is offline Joachim Gerhard  Germany
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My pleasure.
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Old 14th March 2013, 12:26 PM   #8524
Joachim Gerhard is offline Joachim Gerhard  Germany
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Here is a test report of Allens preamp.
6moons audio reviews: Vacuum State RTP3D
When you look inside you can see the white Rifa PPS SMD.
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Old 14th March 2013, 12:33 PM   #8525
Joachim Gerhard is offline Joachim Gerhard  Germany
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Wima makes PPS SMD too :
WIMA SMD-PPS Kondensatoren
Usually they are less expensive as RIFA.
I have not ried them but i can see no reason why they should not be as good.
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Old 14th March 2013, 01:02 PM   #8526
buzzforb is offline buzzforb  United States
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Allens pre is on the build list, for sure.
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Old 14th March 2013, 01:07 PM   #8527
Joachim Gerhard is offline Joachim Gerhard  Germany
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It is a complex animal. I had it ones in my system.
Allen brought it to me shortly before he died.
It had a very particular, airy and delicate sound.
I have also experience with his smaller preamp.
That also has the PPS.
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Old 14th March 2013, 01:08 PM   #8528
Joachim Gerhard is offline Joachim Gerhard  Germany
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Here you can see some, the white blocks in the back :
http://www.vacuumstate.com/fileupload/SVP_2.pdf
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Old 14th March 2013, 01:41 PM   #8529
jacco vermeulen is offline jacco vermeulen  Netherlands
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Quote:
Originally Posted by buzzforb View Post
looking at Polystyrenes
The ones I mentioned were just a few examples.

There are/were much more comparable types from other manufacturers.
As e.g. RiFa (PFE-216) in Sweden, Suflex (SUF677, SUF710) in England, Mial in France.
Some switched hat over the years, e.g. the boxed Siemens KS, became S+M KS manufacture (Siemens + Matsushita).
At a later stage, the technology plus the machinery was sold off to EMZ, who manufactured the exact same KS parts with an EMZ logo for a number of years.

What all these types and brands differ in, is not just the technology, but the manufacturing tools.
The German cap winding machinery is/was SOTA, and as you heard from Stuart, tightness of winding the foils (and variations) is half the story.
Not merely the choice of dielectric.

Main and only reason why the boxed Siemens polystyrenes could also be ordered in 0.1% and 0.05% accuracy, straight from the production line (see the link I posted for you).
Difference between a Chevy small block, and one by AMG (with an individual engine computer data file).

Doesn't mean you shouldn't try newer foil cap types, it's the continuous change in technology that makes audio so fascinating.
(and sometimes, a step back can become a step forward)

Ever seen a 0.5uF polystyrene ?
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Old 14th March 2013, 01:43 PM   #8530
Joachim Gerhard is offline Joachim Gerhard  Germany
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There was a German company, i forgot the name, that made even bigger ones.
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