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Tesla ? coil
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From: Terry Perdue [SMTP:terryp-at-halcyon-dot-com]
Sent: Wednesday, June 03, 1998 7:31 PM
To: Tesla List
Subject: Re: Tesla ? coil
Raymond Koonce wrote:
> Some time ago I visited the Science Place museum at Dallas Fair Park and
> witnessed the "Electric Show". There was a demonstration of a large VanDe
> Graf generator (very impressive) and a coil quite unlike a conventional
> Tesla coil. It was a orizontally- mounted ~3 ft. diameter coil which
> tapered to a ~4" disk from which the discharge (6-8 feet long) emanated.
> The controller apparently had a rotary gap (completely enclosed). The
> only connection from the controller to the coil was by two thick cables.
> Does anyone have an idea what type of coil this is?
I've only been subscribed to this list a short time, but this is the first
reference I've seen describing a tapered secondary. It reminded me of the TC
I saw as a kid at Griffith Observatory, outside LA, I believe. I recall it
as having a flat spiral primary of flat copper strap, and a tapered
secondary with a round terminal with spikes on opposite sides. It discharged
to the walls of the room, a few feet away. Does anyone know if there's an
advantage to tapering the secondary this way?
Terry
terryp-at-halcyon-dot-com