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Re: New Toroid
Original poster: "Ben McMillen by way of Terry Fritz <twftesla-at-qwest-dot-net>" <spoonman534-at-yahoo-dot-com>
I would go with adjustment of coupling and tuning before
going to power increase.. When you added the new topload,
did you retune? I'm assuming that your primary being tapped
at turn 12 was from the original setup..
Coiling In Pittsburgh
--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Shaun R. Phelps by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <shaun-at-visorloop-dot-com>
> I've just completed construction of a new toroid for my
> coil and am having
> some problems. Maybe someone can shed a bit of light.
> Input: 9KV 60mA
> Secondary: 23" * 4.5"
> Toroid: 4.5" flexible aluminum duct. 19" outside
> diameter, wrapped in
> aluminum foil.
> Cap: 12beer bottle + 1 wine bottle SWC
> Primary: 1/4" copper tube, 1/2" spacing, tapped turn ~12.
> Previously I used two 12" salad bowls as the toroid and
> achieved 12" sparks.
> When I replace that toroid with the new one, I achieve no
> sparks. If I use
> a breakpoint on the new toroid, I seem to get 4" sparks
> from that
> breakpoint. I assume that there is simply not enough
> voltage present to
> break sparks from this new toroid and that is my problem.
> However, I have
> read numerous posts specifying that 'you can never have
> too much topload.'
> I thought I would be advancing my coil by adding this new
> toroid and might
> see better sparks, but I see this is not the case. I'm
> wondering if I
> should try and increase the input voltage or current to
> get the sparks I
> desire, and if I do so, can I expect better sparks from
> the new toroid
> compared to the salad bowls? In other words, after
> increasing the input,
> might I expect bigger sparks using the new toroid or the
> old? Any other
> Thanks for any advice.
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