RE: Highest secondary to spark length ratio?

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

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


John F. -

I think I have the record now. Some time ago I put a one turn of 28AWG wire
resonator coil beside my small magnifier TC and got a 6" spark at 80 watts.

The ratio was 6.000/.0201 = 298. If I had upped the power to 100 watts I
could have gotten an even higher ratio.

I agree that both the secondary and resonator should be used for this
comparison.

John Couture

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


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Wednesday, January 21, 2004 8:38 PM
To: tesla-at-pupman-dot-com
Subject: Re: Highest secondary to spark length ratio?


Original poster: FutureT-at-aol-dot-com

In a message dated 1/21/04 6:40:39 PM Eastern Standard Time,
tesla-at-pupman-dot-com writes:

 >"Among the finest of our systems was "Nemesis", a 14" diameter, 48 inch
tall
 >classic coil which regularly
 >produced 14 foot long arcs when operated near its maximum of 9kva input
 >energy.


Peter,

The Nemesis coil gave sparks that were about 0.5 foot longer
than my formula predicts (using kVA).  Pretty much on the curve though.
The Nemesis was a very impressive coil due to the very large
toroid and high input power.  I used to enjoy seeing (and hearing),
that coil run.  I missed it when Richard dismantled it.

Another superb Tesla

 >coil system was Magnifier #11E which utilized a small 12 inch long, 3 inch
 >diameter resonator that produced
 >an astounding 10 feet of output arc with only 5-6kva input energy."


If we figure 6kVA, then the the predicted spark length using my
power vs. spark length formula is about 11 feet.  If we use 5kVA, then the
predicted spark length is 10 feet.  So the magnifier is less efficient
than the Nemesis coil.  Well my formula really uses watts, but VA is
close enough and keeps things standard for comparing with the
Nemesis coil.


 >Don't forget the Magnifier also is driven by the secondary as well and is
 >not really equivalent.  I don't have the secondary details for Richard
Hulls
 >coil but even if his secondary was only 2 feet then the total coil length
is
 >3 feet for a ratio of 3.3 which is not as impressive.


Yes, thanks for considering both the secondary and the resonator
combined, when figuring output spark lengths.


 >Bert Poole's magnifier has a 33" secondary and 24" resonator (total 57")
and
 >15 foot sparks.  For what it is worth that ratio is 3.1.
 >http://bhs.broo.k12.wv.us/homepage/chip/current/bpool/bpool2.html
 >
 >So far the best results I know of are from Ed at 3.77. Now about those
 >pictures..


I wonder if anyone has placed a 1" tall tiny resonator coil on top of their
classic coil and called it a magnifier and then claimed a spark length of
of 100 times the resonator length or whatever?  Well maybe they should
put the 1" tall resonator at the end of a transmission line to satisfy those
who fear
unwanted coupling between the secondary and resonator.  This is not an
original idea of mine, Malcolm and maybe others have spoken of this
1" resonator approach years ago.  Has anyone tried this?  Who will
win the contest for spark length with highest multiples of the resonator
length?

John