RE: LTR cap BPS?

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <gary.lau@xxxxxx>

I would suggest that the actual BPS cannot be calculated given what is
generally known about the circuit parameters, so whatever figure it is
citing is unlikely to be valid.

Gary Lau
MA, USA

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Tuesday, November 30, 2004 8:48 PM
> To: tesla@xxxxxxxxxx
> Subject: Re: LTR cap BPS?
>
> Original poster: "Black Moon" <black_moons@xxxxxxxxxxx>
>
> Well, my question comes from
> http://www.classictesla.com/java/javatc.html
> Seems like if I use its LTR suggestion, it states 60~ or so BPS at any
> decently wide gap setting for the NST.
> Is this just the program screwing up and stateing 1/2 the BPS? or is
it
> really 60bps at those gap settings?
>
> >From: "Tesla list" <tesla@xxxxxxxxxx>
> >To: tesla@xxxxxxxxxx
> >Subject: Re: LTR cap BPS?
> >Date: Tue, 30 Nov 2004 07:59:33 -0700
> >
> >Original poster: "Bunny Killer" <bunikllr@xxxxxxxxxxxxx>
> >
> >Hey Jamie...
> >
> >when using an LTR cap and NST the spark gap is the item that sets the
> >majority of the break rate...
> >
> >the cap will fill to the highest voltage the NST can provide during
the
> >time it takes to make a complete sine wave ( well it will be a tad
less
> >due to resistances) if your spark gap ( lets say its a static gap) is
set
> >to fire at some voltage due to its gap width, the so called break
rate (
> >in theory ) should be 120 BPS ...  this is considering that the gap
width
> >is set for maximum voltage of your NST ( which is pretty much
impossible
> >to set without dedicated measuring equipment)   if you set the gap
too
> >wide the voltage will and can build to better than 2 times its rated
> >voltage  ( and by the way    the voltage ratings you see on the NST
are
> >RMS ratings...  this is sort of an average rating of the sine wave,
not
> >the peak ratings the transformer is capable of...   a good reason to
get
> >your caps voltage value at 2 times the name plate rating)
> >
> >if the gap width is set smaller, allowing the spark to be created in
the
> >gap before the sine wave peaks,  it is possible to have 240+ BPS...
> >what happens in this situation is that the voltage builds and then
jumps
> >the gap ( lets say at 50% of max NST voltage) the resonate circuit
will
> >keep the voltage up a bit allowing the NST to recharge the cap set
quickly
> >and POP another spark jumps the gap before the sine wave peaks...
this
> >can happen several times before the peak of the sine wave....  thus
200+ BPS
> >
> >so  in a nut shell    the BPS should be 120    and resonate action
will
> >cause it to go higher...
> >
> >why 120?   a complete sine wave has both a "positive" voltage swing
and a
> >"negative" voltage swing..   thus  2 swings per complete cycle  ( and
> >there are 60 complete cycles per second in general USA applications
> >since the cap is capable of being charged in both directions ( an AC
cap)
> >it is quite capable of the 120 BPS rate
> >
> >hope this helped..
> >
> >Scot D
> >
> >
> >
> >Tesla list wrote:
> >
> >>Original poster: "Black Moon" <black_moons@xxxxxxxxxxx>
> >>
> >>Hi, I was wondering, when using a LTR cap an a NST, is your break
rate
> >>spost to be around 60? is the resonant action what causes it not to
be 120+?
> >>
> >>
> >
> >
> >
>
>
>