[time-nuts] Low temperature coefficient capacitors for DMTD

[Poul-Henning Kamp]

In message <ECE7A93BD093E1439C20020FBE87C47FED2B80A552 at ALTPHYEMBEVSP20.RES.AD.J
PL>, "Lux, Jim (337C)" writes:

>Seems that boutique item and time-nut might go together, if there
>was an actual performance advantage.  Besides, think of the bragging
>rights from some of this stuff.  It could be worse than audiophile
>craziness: [...]

Thanks for pointing that little shop out.

Did you notice this in their whitepaper:

	From 1960s to 1980s, Electronic Concepts used Peter Schweitzer
	(a Division of Kimberly Clark) manufactured film, the only
	United States supplier of material, by license agreement
	with Bayer. In 1984, Electronic Concepts acquired the Peter
	Schweitzer film division, terminating the license, allowing
	Bayer to market the film in the United States. For economic
	considerations, Electronic Concepts started manufacturing
	capacitors using a balance of Bayer and Electronic Concepts
	film.

Does that sound like a run-of-the-mill business decisions made by
a small company which produces capacitors ?

No ?

Then how about this:

	In 1990, the conclusion of a polycarbonate film capacitor
	paper[1] stated, "both the orientation and crystal structure
	of PC (polycarbonate) film affects its mechanical properties
	and electrical dissipation factor". The paper was a cooperative
	investigation by the Jet Propulsion Laboratory and Electronic
	Concepts' film manufacturing division,

Why would JPL study obscure production details of polycarbonate
film capacitors in 1990, if they fell of the market six years earlier ?

Sounds fishy ?

Anybody know what this means ?

	Electronic Concepts accumulated almost five hundred million
	hours of testing military grade Polycarbonate capacitors;
	and, currently meet established reliability failure rate
	level "R."

Have you connected the dots yet ?

A fair number of the in-stockpile nuclear weapon designs are qualified
using polycarbonate capacitors and can't be retested, redesigned
or requalified...

Poul-Henning

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