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In Reply to: RE: Identify old Sprague caps posted by GeorgePope on April 23, 2017 at 13:45:04
It's MIL spec, but otherwise the materials look somewhat run-of-the-mill. Could be an excellent sounding cap, only way to know would be a comparison with other types in the same amplifier.
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Mixed dilectric , no doubt paper and polyester dilectric with some form of oil or wax impregnation . Probably intended for pulse applications . I can't find anything similar in old Sprague catalogues apart from 282P series , which were can-type caps
What is the URL of that database ?
george
I didn't save the URL, but you should be able to Google it. Try "CH05A1NF." They're metallized paper with a plastic dielectric. Not sure if a special plastic is used at those temperatures, but it's almost certainly dry or impregnated with a non-flowing binder.
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Buy Chinese. Bury freedom.
I haven't been able to find that sheet anywhere and it resembles a spread sheet that someone may have made up. Every Sprague cap I own with a paper content,has a P in the number designation. Read this.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
These Sprague caps appear to be intended for military rather than commercial applications hence the lack of data and unusual part numbers . The details previously posted on here look to be correct
Here are details my supplier just sent to me .
'CH05A1NF104K Hermetically Sealed Metallized Polyester Capacitor. MIL-C-18312 Compliant. CH05A1NF104K has unique dual dielectric.
Combination of metallized paper and polyester film, impregnated with high temperature mineral wax. Inserted tab. Insulated.'
George
George
He may be right.I'll look and see if I have one of those caps because I am curious now. If I do,I'm going to break it open on the vice for verification.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken
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