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Original poster: "Gerry Reynolds" <gerryreynolds@xxxxxxxxxxxxx>
Hi Mike and Chris,
Using this LTR value will go a long way to protecting your
NST. However, you still need to have your safety gap properly set as
the transients could put the voltage in excess of the 12KV rating.
Original poster: Mike <megavolts61@xxxxxxxxx>
If you match the impedance of your NST ( which
equals 12000/.03) by using the equation:
C = 1/(2*pi*f*Xc) you will have C =
1/(2*3014159*60*12000/.03) and get 6.63nF. If you use this, you
can cause a resonant rise of voltage in your NST and possibly fry
it. The value of 10nF, or 0.01uF will ensure your cap can take
all the energy from the transformer safely for the transformer. If
you use both of the caps you were talking about (.1uF and .03uF) in
series, you'd still have .02uF. You can make that work. you
will just have a lower gap voltage and unless you have a LOT of
turns on your secondary, it could prove harder to tune. Still not
that big a deal.
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