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Re: Dielectric Constants and Breakdown Voltages (fwd)
From: Alfred A. Skrocki [SMTP:alfred.skrocki-at-cybernetworking-dot-com]
Sent: Wednesday, November 12, 1997 11:57 AM
To: Tesla List
Subject: Re: Dielectric Constants and Breakdown Voltages (fwd)
On Wednesday, November 12, 1997 6:47 AM Sandy
[SMTP:DamDeName-at-aol-dot-com] wrote;
> Hello all,
> With regard to the puncture voltage an dielectric
> constant of mylar -- 7500 v ? (not 750 v ? )
>
> In either respect --- I recall some comment
> that mylar was not good for caps for T.C. service --
> if this is so (meaning my memory is not failing me) :>)
> howcome ??? --- It seems worthwhile esp.if the 7500
> V/mil is accurate ---
Sandy, the reason mylar makes such poor capacitors is due to it's having a
high power factor. What a high power factor means is the material is
absorbing large amounts of R.F. power, this is typicaly manifested by the
dielectric heating up. In the case of mylar it is so bad that you actualy
get to see the capacitor get so hot that it melts itself, breakdown occurs
and the mylar catches fire and burns!
Sincerely
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Alfred A. Skrocki
Alfred.Skrocki-at-CyberNetworking-dot-com
.ooo0 0ooo.
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