Re: Micro coil specs? pics? (was Micro coil earthing)

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Original poster: "Dr. Duncan Cadd by way of Terry Fritz <twftesla-at-uswest-dot-net>" <dunckx-at-freeuk-dot-com>

Hi Joe, All!

>spark gap is 4 copper pipe sections laid out on a glass tabletop,
adjusted
>manually.  One end pipe has a lead from the cap string touching it,
the
>other end pipe has the end of the primary coils wire touching it
(very
>secure ;)


You might want to try a simple two electrode gap.  My 15W coil is very
happy with two half inch phosphor bronze balls as the gap, but not so
happy with a five 1,5 inch diameter brass plate mini-multi-plate
"quenched" gap.  I assume the extra losses in the multi-plate gap are
not compensated for by better quenching because the power is so low
that quenching is good with two electrodes anyway; the extra losses
are very significant on this scale too, whereas they wouldn't be at
500W.  Gap separation appears really really critical, but I think
that's a function of the induction coil dynamics rather than the low
power.  YMMV as always.

Dunckx
Geek#1113 (G-1)