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intro + coil questions
Original poster: Ben Buxton <bb@xxxxxxxxxx>
I've just joined this list and thought I'd introduce myself before
asking a question or 2 on coil design.
I hail from Sydney, Australia and have been interested in electronics
for a long time now. I've played a lot with high voltage stuff as
well, having done things involving he-ne lasers, ignition coils,
LOPTs and jacobs ladders from NSTs. Getting good HV gear is
reasonably easy here so there's plenty of room to play.
My most ambitious project is, naturally, a Tesla coil. I'm currently
building a 6" coil, powered from a 15kv, 60mA NST. I've sourced all
the parts (including TDK pulse capacitors) and am slowly getting it
One aspect I've not yet found an answer to is whether to place the
NST across the gap or the caps. Some designs have it one way, and
others the other. Is there any guideline as to what's best? I can see
things involving less kickback to the NST with it across the gap, but
there's probably more to it than that.
I've also got a bit of a concern with my secondary. As I'd not been
able to (read - didnt research hard enough!) find long enough single
spools of wire to wind with, I've used 3 x 250metre spools, and made
splices along the length. These consist of the ends soldered together
(with minimal 'sharpness') and sleeving places over the join, then
epoxy sealed using araldite. Will this give me any problems? After
winding, I only now know where i could find 700 metre spools, but too late!
Thanks for any help!