RE: Highest secondary to spark length ratio? (the best ones)

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

Original poster: "John H. Couture" <couturejh-at-mgte-dot-com> 


Peter -

You have built a terrific Tesla coil and web site, congratulations. Your TC
appears to be very efficient by the looks of some of those sparks. Some day
a coiler will figure out how to determine the energy in TC sparks.

John Couture

----------------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Friday, January 23, 2004 1:28 PM
To: tesla-at-pupman-dot-com
Subject: Re: Highest secondary to spark length ratio? (the best ones)


Original poster: "Peter Terren" <pterren1-at-iinet-dot-net.au>

Robin Copini's coil is 110cm giving 498cm at 20KVA ratio 4.5.  Seems to be
the best so far but I have asked Robin to check this as by his height of 177
(= 5' 10") his coil looks to be about 128cm ie ratio 3.9. Best photo shows
5.3:9.5 ratio 1.79 but angle to vertical spark is not ideal.
http://www.geocities-dot-com/rcopini

Dr Resonance 10.5ft coil giving 24ft sparks and ratio 2.28.  Best photo
4.0:8.0 ratio 2.0
http://www.resonanceresearch-dot-com/museum-products-electrical-optics-demonstra
tions.htm

Ed Sondermans coil is 27.6" giving 104" sparks ratio 3.77.  Best photo
3.1:7.0 ratio 2.25
http://members.aol-dot-com/esondrmn/index.html

Richard Hull's "Nemesis", a 48" giving 14 foot (=168") with ratio of 3.5.
Best photo 2.8:6.0 but ends of spark not shown. Ratio 2.14
http://www.richmond.infi-dot-net/~rhull/highenergy003.htm

My 32 " and 96" giving ratio 3.0. Best photo 4.0:12.0. Ratio 3.0
http://members.iinet-dot-net.au/~pterren/Tesla_8ft.JPG

My point is that there are some magnificent coils out there with great
performance but have photos that do not do the maximum spark length justice.
ie that show sparks greater than 3.0 times coil length measured off the
photo.  This I believe gives a lot of the "WOW" factor.  I am still looking
for a TC photo of any size coil that beats that ratio. Please help!

Cheers
Peter (Tesla Downunder)
http://members.iinet-dot-net.au/~pterren

  >  >  >I am interested in the longest sparks (hey - aren't we all) in
  >  >  >comparison to the secondary winding length with a classic TC. Mine
does
  >  >  >96 inches for a secondary of 32 inches ie ratio of 3 times. I have
  >  >  >heard of ratios up to 5 times but have not seen any documentation of
  >  >  >this. Has anyone got pictures of coils pushed to higher ratios that
  >  >  >show the distances clearly? (I need a new desktop background).
  >  >  >Cheers
  >  >  >Peter (Tesla Downunder)