RE: Highest secondary to spark length ratio?

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

Original poster: "Mccauley, Daniel H" <daniel.h.mccauley-at-lmco-dot-com> 



I believe Richard Hull has you all beat.  Not a tesla coil in the
classic sense, but a magnifier.  One of his
later magnifier designs has something like a 12" to 15" height resonator
coil putting out arcs at about 10 feet.
That more than a 8:1 ratio.  Most of his magnifier designs (especially
the later ones) were putting out more than
5:1 spark to height ratios.

Dan


 >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)


Peter,

My 6" coil, quite similar to yours, does 104" sparks with a 27.6"
winding
length for a ratio of 3.77.

Ed Sonderman