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In Reply to: RE: Mica VS Polystyrene posted by 6bq5 on July 21, 2017 at 10:14:22
Yes, that's the downside to the 'styrenes. Small silver micas take heat with no problem. I wonder if the change degraded the sound.
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Just want to point out that Xicon polystyrene caps are rated to 85C. I've never had a problem with this limitation in audio work, and never had one of these caps fail.
Man, just look at those numbers for dissipation factor and Q!
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Buy Chinese. Bury freedom.
It can get hot near some tubes and polystyrene exhibits a low melting point. In a 'X7 based phono preamp 'styrene should be quite safe.
The film dielectric "pecking order" is PTFE, polystyrene, and polypropylene. Practical considerations, such as cost and heat tolerance, make polypropylene a "favorite".
Eli D.
size is also a factor. Teflons and polystyrenes tend to be bigger than polypropylene.
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