Re: [TCML] JAVATC & tuning

[DC Cox <resonance@xxxxxxxxxxxx>]

1/4 to 1/2 turn is normal with a 7-9 turn pri.  With larger primaries a 2
turn variation is normal.

It's like a percentge of the whole thing.

You may wish to increase your capacitance, thus adding more energy, and try
to get down to 8-10 turns max.

Also, a hyperbaric gap design will provide optimum performance with most any
nst powered coil.

Dr. Resonance




On Tue, Apr 6, 2010 at 4:04 PM, <otmaskin5@xxxxxxx> wrote:

>
> Hey guys - I just built a built a 6" secondary & installed on my 15/60
> system (replaced the old 4" secondary).  I ran it on Sunday & like the way
> it's performed so far.  I've got the static gap set conservatively at 0.12",
> & will gradually open in up as I get more confident everything is in balance
> & working the way it should be...which brings me to my question.  JAVATC
> indicates optimal tuning at 17.3 primary turns.  I started there but didn't
> get any sparks at all.  Eventually after trial & error tuning I found the
> optimal primary tap point at 19.3 turns, 2 full turns more than JAVATC
> indicated.  The coil seemed to run smooth at 19.3 turns and I didn't detect
> problems to indicate the anything was significantly out of tune.
>
> In the past, JAVATC has always proven to be right on the money or within a
> quarter turn of where I've found the actual tuning point.  So I'm thinking
> I'm doing something wrong here - 2 full turns seems like major difference.
>  I've gone back, checked  & confirmed all the inputs (physical dimensions &
> elevations) and I've run the program a few times always getting the same
> result - 17.3 turns.  It's really bugging me like something's just not
> right.  Any ideas on what else I might look to resolve the discrepancy?
>
> Thanks for any ideas, Dennis Hopkinton MA
>
>
>
>
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