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Psvane Teflon capacitors real or fakes?

These are great looking capacitors and supposed to be competing against the Audience, Rel, V-Cap, and Sonicap Teflon capacitors. A couple of my tweaky friends who have no end to new capacitors gave them a try and had one quit after a month or so, and with the wire cut off, no return possible. So they cut it open, yes they are curious, and according to them, the guts looked like mylar, measured like mylar??? Could these not be Teflon caps after all??? I open this for discussion with some of the tweaky electonic minds out there to get to the bottom of this. If they are not genuine teflon, I would not want fellow audiophiles to get ripped by another false claim. But to be fair, real verifiable data should be submitted here, no guesswork. I trust my friends, but I did not do the test, so I open it to other philes. Hey, I like a great deal too, but if it is not as advertised, I get pissed too. Take a look fellow philes, and lets solve the mystery....Jallen
jallen

Showing 5 responses by magfan

magfan
1,583 posts
 
Teflon is 'soft' to the touch compared to mylar.
If the mylar is the same as in a space blanket, it'll be 'crinkly' and harder to the touch. It may feel slick, too. Teflon may even stretch....though I've never messed with it in quite that thin a pices. Mylar shouldn't stretch.

The measures above? Good stuff and seem to indicate mylar.

for Serengetiplains: Isn't surface area tied in there as well?
magfan
1,583 posts
 
HF....also known as HydroFluoric Acid is REALLY bad news. In the body, it attacks CALCIUM which is pretty much what bones are made of. Thus, the potential arthritis makes some sense.
There are both liquids and gasses which have HF in them.

People exposed to hi-doses....such as people who work in the semiconductor industry, get calcium shots. This is some painful shit.

HF is used to etch silicon.
Teflon is used all over the semiconductor processing industry. Cassettes and ways to move wafers while exposing them to liquid acids are almost uniformly Teflon, though Polypropolene also is used since it is solvent proof.
magfan
1,583 posts
 
Went to Grant Fidelity and now my computer thinks I speak French!
magfan
1,583 posts
 
Did that last nite.

For a second, I though my computer had turned on me.

C'est la vie.
magfan
1,583 posts
 
The DOWNSIDE of pure copper is that it oxidizes like crazy and the resulting oxide is a diode.
Not at all how I want a capacitor to act.
What is the conductivity of BeCu? And to go all metalurigical on you, how much Beryllium is added to these alloys? I know their must be a bunch of alloys with who knows what else added.

Question: What is a good copper alloy which has low oxidation potential AND the requisite good conductivity?

Failing THAT, does anyone SEAL the cap in an inert enviroment so the copper can not oxidize?
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