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Re: Reactance and small pigs
Hi Nathan,
If you are going for a non-current limited Trany, don't worry about
"resonant" cap matching. Match your cap for the power level you want to
process. Resonance matching is something to squeeze out everything possible
from a Neon. I have a 7200V potential trany and believe it'll be just fine
for a standard TC (only used it up to 2.5' sparks, so far,due to
time/space/noise issues). If you can get two, the better, as you can now do
14.4-at-6KVA (assuming 3 KVA pigs), more voltage, same current rating. Don't
you live in Newport? If so get several (if cheap ;-)) and I'll buy one off
of you (I am in Eugene).
Regards,
David Trimmell
At 09:58 AM 4/15/00 , you wrote:
>Original Poster: "Nathan Ball" <nateburg-at-hotmail-dot-com>
>
>Salutations again!
>
>What exactly is reactance? I know how to calculate it and how it relates to
>required capacitance for the coil, but i'm not quite sure what it is.
>
>A 7200 3 kVA pig has about 17,000 ohms of reactance (7200v/0.416mA), while a
>14400 3 kVA has about 70,000 ohms(14400v/0.208mA). With the equation for
>capacitance i have,
>
> 1/(2*pi*60hz*[Reactance of transformer in ohms])=capacitance in Farads.
>
>So for resonance with a 14400 I need 0.038uF and for a 7200 for the same
>wattage i need a whopping 0.15uF!! so you can see, i'd really really
>rather have a 14400 v 3 kVA pig than just a 7200.
>
>One possibility someone said is to attach the primaries of two pigs in
>parallel and the secondaries in series. I can do this, but what happens then
>to the wattage? does it stay the same? if so, why? do you have to have some
>equation for series transformers just like series resistors?
>
>Thanks all,
>
>Nathan
>PS is all of my math right as far as equations, or am I misinformed? Hope it
>is!
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