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Re: [TCML] Racing sparks - question

I also get racing sparks on my coils if I don't have a breakout point, so I
just use one.  I could reduce the coupling, but fear that sparks from a
point would be reduced.

One thing you can try is to add a spacer between the two toroids.

Regards, Gary Lau

On Sat, Aug 7, 2010 at 8:43 PM, <otmaskin5@xxxxxxx> wrote:

> Hi coilers.  Life's been busy the last few months & not much time for
> coiling, although I still read the pupman postings.  Anyway, I did find the
> time to roll out my coil tonight & run it, but I kept running into on an old
> problem I've had in the past.  Using a screw or ball bearing for a breakout
> point, my 15/60 coil produces good sparks, and the coil runs well with no
> problems.  If I remove the breakout, I still get sparks from the toroiod,
> but eventualy start getting racing sparks.  Without the breakout point, the
> coil seems to have no trouble producing sparks from the topload even fairly
> lower variac voltages, but when I increase variac the voltage to the 120 or
> higher I eventually get the racing sparks.    I've played around with
> raising the secondary to reduce coupling, but so far, I'm still getting
> racing sparks if I dont use a breakout.
> If it's just a matter of over coupling, I'll have no problem gradually
> raising the secondary to eliminate the problem.  However this will be
> somewhat involved as I have to removing the secondary's end cap & adding a
> longer mounting bolt.  Before I go much further, I wanted to see if any of
> you guys had other suggestions on what might be causing the racing sparks
> when I don't use a breakout.  I'd really like to be able to run the coil
> without using a breakout.
> FYI, I have a 6 X 20.5 toroid and a 3 X 12 toroid underneath it.
> Thanks for any suggestions, Dennis Hopkinton MA
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