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Capacitors
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To: tesla-at-grendel.objinc-dot-com
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Subject: Capacitors
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From: richard.quick-at-slug-dot-org (Richard Quick)
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Date: Sat, 27 Jan 1996 23:26:00 GMT
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>Received: from uustar.starnet-dot-net (root-at-uustar.starnet-dot-net [199.217.253.12]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with SMTP id SAA01251 for <tesla-at-grendel.objinc-dot-com>; Sat, 27 Jan 1996 18:55:03 -0700
* Original msg to: I_hopley-at-wintermute.co.uk
* Carbons sent to: usa-tesla-at-usa-dot-net
Quoting Ian Hopley <i_hopley-at-WINTERMUTE.CO.UK>:
> Our local stationary supplys is having a sale at the moment
> and is selling boxes of 100 A4 document holders for 2.50 u.k.
> Pounds. These folders measuring aprox 8inch by 11inch are
> manufactured from polypropylene. The only ref. i can find
> to this material states that "it is a very low loss
> di-electric suitable for continuous high a.c voltages. It will
> withstandhigh voltage, fast rise time pulses and has an
> excellent high frequency performance."
> Could anybody advise me on their possible suitability for a
> stacked plate capacitor and give me the "K" value and punture
> voltage as most of my tables dont list it.
polymer dielectric dielectric dissipation
constant strength factor
50Hz / 1Mhz (Kv/cm) 50Hz / 1Mhz (x10^-3)
-------- ----------- ----------- -----------
Polypropylene 2.27 / 2.25 240 .40 / .50
This plastic is a very suitable dielectric for pulse discharge
capacitors.
Richard Quick
... If all else fails... Throw another megavolt across it!
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