RE: H/D ratio

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

Original poster: "Luke" <Bluu-at-cox-dot-net> 

Bummer another idea bites the dust.  :)

Luke Galyan
Bluu-at-cox-dot-net

-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, January 16, 2004 5:02 PM
To: tesla-at-pupman-dot-com
Subject: Re: H/D ratio

Original poster: "Dr. Resonance" <resonance-at-jvlnet-dot-com>


You can't cast it in epoxy --- won't work.  Remember your theory?  HF
currents couple through normal insulators through capacitive coupling
via
displacement currents.  Many insulations will not stop HV RF energy.  If
the
freq is low enough you might be by but above 200-300 KHZ you will have
serious problems.

  >
  > >I found on the net in a few places stating that the maximum amount
of
  > >inductance from a coil is when the height is the same as the
  > >diameter.  This is a 1:1 ratio.
  > >
  > >If that is the best inductance ratio then why is this ratio not used
for
  > >the tesla coil secondary to take advantage of a high inductance
ratio
  > >between the primary and secondary?
  > >
  > >Luke Galyan
  > >Bluu-at-cox-dot-net
  >
  >
  > this is an interesting topic.
  > there are examples of pancake coils out there. it looks to me like it
would
  > be a fascinating experiment
  > to wind a 1500 turn coil that's only 1" tall and 10" across, the hole
thing
  > could be cast in epoxy.
  > the pri coil could be below or around it also cast in the epoxy.
  > I like the idea of alternative coil designs. I think it would be fun
to
  > make a small coil with super insulation and over power it to the max
and
  > see if you could get your 50" sparks out of a 10" disk.
  >
  > read you later
  > Josh
  >
  > _
  >
  >
  >