RE: Conical Secondaries

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>

Hi Steve,

I have one of Tesla's conical coils.  I can tell you how he built it (how
his assistants built it.)

He used plywood to make the layers that build up into a cone.  This way
there is total control over the shape of the cone.  At the vertex, a screw
is inserted that holds the wire and it is wound from the point to the base.
The coil I have is wound with cotton covered, solid copper wire.

Dave

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Saturday, February 23, 2002 9:51 PM
To: tesla-at-pupman-dot-com
Subject: Conical Secondaries


Original poster: "S & J Young by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<youngs-at-konnections-dot-net>

List,

A few coilers have built cone shaped secondaries, such as the one at
Griffith Observatory and the clone of it Bill Wysock built.

Question - other than aesthetics and perhaps saving some wire, are there any
technical advantages or efficiencies to be gained?  With all the discussion
of flat spiral secondaries, let's give conical secondaries their fair share
of interest too!

(If anyone has any practical experience building a conical form and winding
it without the wire slipping loose, please share it with us.)

Thanks,
--Steve