Re: Toroid to primary arcing

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Jeremy Scott by way of Terry Fritz <teslalist-at-qwest-dot-net>" <supertux1-at-yahoo-dot-com>

There are usually two ways to keep this from
happening, a) install a strike rail, and b)
raise the toroid.

Okay, a) isn't really a solution but it does
make coils that have short secondaries a little
safer, but there is no guarantee that streamers
headed for the primary will always hit the rail.
You may also change your design such that the
primary doesn't extend out beyond the diameter of
the toroid. (If you have extra unused turns,
remove them.)

If you take the option of raising the toroid, you
may see some corona leakage from the top winding
on the secondary. This is wasted energy that should
be pumped into the toroid, you can fix it by placing
a small corona ring around the last winding. However,
this will change the top load capacitance and you will
have to retune the coil.

IMHO, if you're selling coils to anyone who wants one,
be sure to include at least a strike rail.


--- Tesla list <tesla-at-pupman-dot-com> wrote:
 > Original poster: "Steve K by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <teslainnovations-at-yahoo-dot-com>
 >
 > Hello everyone,
 >
 > I have been making coils for 4 years now, and often
 > sell Tesla coils on Ebay under the name,
 > "Energywizzard". There is another seller on there
 > who
 > is bashing my coil, because some arcs from the
 > toroid
 > touch the primary. I have safety gaps, and they only
 > fire a small amount of weak discharge when this
 > happens. It was to my understanding that this was a
 > perfectly acceptable function of a Tesla coil. Am I
 > wrong? I know that there is the possibility that the
 > high amperage of the primary can connect to the
 > output, but is this the only danger? That's what I
 > was
 > thinking... Anyway, I have some excellent pictures
 > under the listing, "TESLA COIL- 45 inch arcs
 > LIGHTNING
 > GENERATOR," if anyone was interested in seeing my
 > 12/60 coil.
 >
 > Steve Klec
 >
 >
 > msnip...
 >
 >