Re: Conical Secondaries

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

Original poster: "rheidlebaugh by way of Terry Fritz <twftesla-at-qwest-dot-net>" <rheidlebaugh-at-zialink-dot-com>

I have three cone coil tesla coils. One 811 tube (hartley osc), One kicker
coil, ond the other a spark gap. They are no more trouble to wind than a
solinoid coil if you start at the large end and coil to the small end with
the coil-form turning in a vertical position. once made they are more stable
than my solinoid coils. I have no sign of racing sparks on any of them and
they are not coated. I would not dare use my solinoid coils that way. My 811
coil was made soon after WWII on wood and has deteriorated to the point it
is unstable, but it is still working so I havent fixed it, one day I should
if I dont die first.My newest one is only 20 years old. I make cones by
useing a rubber trafic cone as a form with mold releace and coating it with
fiber glass. When hard the cone pulls free easly. That is much easier than
turning a wood cone form and prying the fiberglass coil form off the mold.
     The two greatest advantages of these is size and low maintenance. I use
them to supply high voltage in the lab. My largest is only 2 ft tall. When I
nead voltage I just pull them out, blow off the dust, and fire them up. My
solinoid coils are higher power, but reguire TLC to fire them up.
  Robert  H

> From: "Tesla list" <tesla-at-pupman-dot-com>
> Date: Sat, 23 Feb 2002 20:50:55 -0700
> To: tesla-at-pupman-dot-com
> Subject: Conical Secondaries
> Resent-From: tesla-at-pupman-dot-com
> Resent-Date: Sat, 23 Feb 2002 21:01:47 -0700
> 
> 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
> 
> 
> 
>