RE: 60 Hz Resonant Circuit?!?!
If you find that you can't tune your primary with your cap, then you need a
new primary with more turns. Sorry, no magic answer.
As to what size your cap should be, that's a very interesting question
without a simple answer. The convention wisdom has been to size it to be
mains-resonant with your NST secondary, and there's no question that this
will work. I recently discovered that I get significantly better results
with twice the cap value for mains resonance. By all means, try the .01uF
cap. In addition to not needing a new primary, you also may be pleasantly
surprised with the results!
Regards, Gary Lau
Waltham, MA USA
>Original Poster: Yuri Markov <wmondale-at-hotmail-dot-com>
>I need help. I am running (or rather attempting to run) a moderately-sized
>tesla coil off of a 12,000 volt, 30 milliamp current-limited neon sign
>transformer. Every design program or mathematical document I've seen has
>said that I need to match my primary capacitor to the impedence of my
>transformer (volts/current). And yet, if I use the ideal capacitor value to
>match my 60 Hz mains frequency, which is 0.0066 uF, my primary coil
>doesn't have enough turns to run the primary circut at the secondary coil's
>resonent frequency. My question is, how important is it really to have the
>right size capacitor? Is it alright to run, say, a 0.01 uF capacitor with
>this transformer? How much will this effect the coil's output? How much
>can I go? I'd appreciate any help.