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Re: Questions on Coil performance

Original poster: "Gregory Hunter by way of Terry Fritz <twftesla-at-qwest-dot-net>" <ghunter31014-at-yahoo-dot-com>

I have witnessed this phenomenon twice--where
increasing the input current actually decreased the
output streamers. In both cases it was due to spark
gap heating and power arcing. A gap that performs well
at 30ma input may have trouble quenching 60ma. Just a
theory. So what kind of spark gap are you using?



--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Andy Cobaugh by way of Terry Fritz
> <twftesla-at-qwest-dot-net>" <kb3ewy-at-rcn-dot-com>
> Hello all,
> I have a couple of questions.  When I ran my coil
> with a 15/30, I got 30"
> arcs with 15 geek caps in series.  When I moved up
> to a 15/60, I can only
> get 33" arcs with 12 caps.  When I went to 11 caps,
> moving closer to LTR,
> the arcs were even shorter.  It was in tune each
> time as I use a roller
> inductor to tune it.  Also, how important is toroid
> height?  I see the same
> performance whether it is 1" or 6" above the
> secondary.  What should it be?
>  Any help would be much appreciated.
> Andy, KB3EWY
> http://users.rcn-dot-com/tcobaugh/andy/tesla.htm