Glass Caps

• To: "'Tesla List'" <tesla-at-pupman-dot-com>
• Subject: Glass Caps
• From: Tesla List <tesla-at-stic-dot-net>
• Date: Sun, 25 Jan 1998 10:25:20 -0600
• Approved: tesla-at-stic-dot-net

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From:  Gregory R. Hunter [SMTP:ghunter-at-mail.enterprise-dot-net]
Sent:  Sunday, January 25, 1998 9:19 AM
To:  Tesla List
Subject:  Glass Caps

Dear Readers,

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.

Greg

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