Re: BPS?

["BunnyKiller" <bigfoo39-at-telocity-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Tesla list wrote:

> Original poster: "Garth van Sittert" <garth-at-mediasupplies.co.za>
>
> If the spark gap fires at only ~120 bps then how does the primary coil and
> cap resonate with no current path available (ie no ionised air in spark
> gap).  Does the primary tank resonate only while the spark created by the
> NST is there to conduct.
>

Hi Garth ....

to understand this anomoly   ;)    we need to slow time down emmmmmensly...
( if im gonna misspell it lets really misspell it)

when the primary gap fires ( remember now time is really slow now)  it fires
for an hour and during that hour the combination of the primary coil and main
cap will produce a wave of energy that will reverberate between the coil and
capacitor every second. Eventually that wave will reduce its energy due to
"electrical resistances" and these losses will cause the gap to quit
conducting. As this energy is undulating back and forth between the primary
coil and capacitor, it is producing an electromagnetic field that is
"absorbed" by the secondary coil and top load. Hopefully, the secondary is "in
tune" with the primary/ capacitor system. If it is in tune, the wave pulses
produced by the primary/main cap system will match the same "reflective" wave
properties of the secondary....    this is the all desired "sweet spot" .

Imagine a Slinky streached out on the floor and attached to the wall....
you give it a push and watch the compression point travel down the slinky and
hit the wall... that energy is "reflected" back towards you... and when that
compression point is nearing the end of the Slinky near you ... you once again
give it a push... with the existing energy that was originally put into the
Slinky and the second push added to it gives it more energy than you had
originally put into it.

If you were to do this about 100,000 times a second, it would possibly be able
to break the wall...  ( this is the break out voltage off of the toriod)

A coil that is semi out of tune will still operate too ...   why??    imagine
that slinky again ...     you give it a push and the compression point travels
to the wall and is reflected back to you...    but you give the slinky a push
just before or after the compression point gets to you.... but you pushed it
hard enuf to overpower the existing compression point...

a fine example is that many coilers can get 12" off of a 15KV/ 30mA NST coil
but when that "perfect" push is in time with the reflected bounce of the
slinky suddenly turns that 12" into 36" of streamers.

Back to real time....     this reflective bouncing occurs 100,000 times a
second  if not faster and getting that perfect timing to occur may require
that you spend time testing different points on the primary coil not in 1/4
turns  but in 1/90th of a turn ( yes it is alot of testing)  I've found that
even 2" of difference on the primary coil tap point makes a difference when
you get close to the "sweet spot".

Be patient ...    the time spent finding that "sweet spot " will be rewarding
....    it makes a difference between 3 feet and 6 feet of streamer....


gawd im feeling talkative tonite  ;)


Scot D