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Glass Caps
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From: Jeff Corr [SMTP:corr-at-enid-dot-com]
Sent: Sunday, January 25, 1998 11:56 AM
To: Tesla List
Subject: Re: Glass Caps
>Anyone ever run a medium or large coil with a glass cap? I'm trying
>to figure out how bad the heating problem is at 1KVA and up. I've
>only built 3 small coils, all under 500VA. All I've ever used is
>glass caps, and I've only experienced one unexplained failure in a
>foil & window glass cap on a 380VA coil. A hasty autopsy revealed
>glass panes laced with very fine, spider web-like cracks. Might've
>been due to thermal effects. My current 450VA coil runs with salt
>water bottle caps. I think the water sinks so much heat, I'll never
>be able to detect RF heating at such low power input levels.
I have run my coil at 1350VA with SW caps before. Usually though, I
used 900VA. I have lost three bottle caps at this power level. Perhaps
it is just the fact that I am using 15kvs, but it seems to me that as your
power levels increase, the life of your bottle caps decrease. Ironically,
Tesla used SW caps in many of his 25kva+ experiments :)
Jeff Corr | corr-at-mail.enid-dot-com | 580-234-6749
http://www.harvestcomm-dot-net/personal/corr/index.htm