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Re: 3/4 wavelength error
Tesla List wrote:
>
> >From jim.fosse-at-bdt-dot-comTue Aug 6 11:20:50 1996
> Date: Tue, 06 Aug 1996 05:08:51 GMT
> From: Jim Fosse <jim.fosse-at-bdt-dot-com>
> To: tesla-at-pupman-dot-com
> Subject: Re: 3/4 wavelength error
>
> >From: Skip Greiner <sgreiner-at-wwnet-dot-com>
> >To: tesla-at-pupman-dot-com
> >Subject: Re: 3/4 wavelength error
> >
>
> >> Skip,
> >> I knew that you were using a sync break and getting very good
> >> length discharges. I did not realize you were using such a short
> >> length secondary and primary. What value is your primary cap? 0.02uF?
> >>
> >> you've perked my interest.
> >>
> >> jim
> >
> >Depending on the drive transformer which I happen to be using, I have been most
> >successful in using a cap that is matched to the transformer using the classical
> >formula. When using a 15kv 120 ma unit, I use a .021 mfd. My best input power to
> >discharge ratio has been when using a 720 va transformer which produces 48" discharges.
> >I cannot figure out why I have been unable substantially increase the discharges when
> >going to higher power.
> >
> >Skip
> >
> May I suggest that you are not using the higher power? If you have a
> synchronous rotary, a fixed number of commutations per cycle, and the
> same HV. P= 1/2 * C * V^2 * BPS : won't change. You are doing some
> things right thought. 4' at 720va! I would guess that the output
> voltage of your neons are similar. Changing the cap will not effect
> the drive voltage to the TC primary much.
>
> jim
Jim
Sorry, my post was not clear. I use a .021 cap with the 15kv 120ma neon
which delivers 1800va. The 720va unit is a 12kv 60ma and the cap used
with this neon is .013. My statement still goes: I can't figure out why
I cannot get much larger much larger discharges with 1800va input.
Skip