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Re: Optimum coil configuration




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Stan,
        I don't think you can fully charge your .025 cap with
your input power of 15kv-at-60ma. It seems to me a .01 would be
much better suited to the application. This would allow you
to tune further out on the primary as well, therefore creating
a larger field to encompass the secondary and have better
energy transfer. As for a shorter secondary, that would take
away inductance (L) from the secondary and you would compensate
by reducing the inductance in the primary via less turns for
tuning. I would go with a smaller primary cap.

Bob Schumann

>
>Hi y'all,
>	I have been operating the following setup for a while now. Because
>of business trips, winter, laziness and various personal disasters, I
>haven't gotten to do as much experimenting as I'd like.  Lately, though I
>find that I'm having a bit more time to play (and it's been warmer)
>so I got to wondering about the consistently poor (in my view) performance
>that I've gotten from my coil.
>
>	The stats are:
>	2 15-at-30 neons
>	around 50 feet of 3/8" copper, 3/8" apart for primary
>		Primary is sometimes inclined for better performance
>	a CP .025 uF capacitor
>	6.5" X 27.25" secondary
>	various toroidal terminals
>
>	The system usual tunes at about 8.25 turns or so.  The best
>performance to date has been about 22", from the largest toroid that I
>have, about 30" X 3 made from drain duct for trailers.
>	Would I get better performance given the power limitations that I
>have from a shorter secondary?
>	Would a shorter secondary cause the tuning to move to less turns
>or more?
>	
>
>Stan Harle
>Alamogordo, NM
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