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Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>
WinTesla says for resonant operation at 50Hz, you
should use .053uF. Since your voltage is a bit lower
than optimum, resonant operation might be desirable
because it can give a voltage boost.
Current wisdom is that filter inductors between the
NST and the Tesla coil are a bad idea. The theory is
that inductors can "ring up" to very high voltage like
little Tesla coils, possibly doing more harm than
good. I suggest an RC filter and safety gaps to
protect your NST. I've got a diagram for a simplified
NST protection filter on my web site. I use it myself
at 9kvac/120ma, and my NSTs have been trucking along
for a long time.
I don't use any mains filtering with any of my Tesla
coils, so I can't speak to that issue. I think mains
filtering is unneccessary, but that's just me. I don't
use power factor correction either. I think the Tesla
coil presents a complex, shifty, and highly reactive
load to the NST that mostly invalidates PFC. I don't
have data to back that up, it's just a hunch.
North Shields? Where's that? I lived in Beck Row,
Suffolk 1995-99, and I miss it. Village life sure had
its charms. Rural Georgia is a nice place to live too,
but I can't find decent fish n' chips around here!
--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Gordon Forrest by way of Terry
> Fritz <twftesla-at-qwest-dot-net>"
> Dear Tesla fans,
> what value cap is best to use with a 6kV 100mA NST?
> I worked
> out what the best value should be, getting max
> current by getting the
> resistances the same. I've been told to use a much
> lower value from a
> Also I've been told NOT to use inductors between
> the NST and
> the cap to stop kickback. I will be using a 16A line
> Do I need a cap to correct the power factor and
> what value should
> it be?
> Gordon Forrest
> Sunny North Shields UK
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