Re: First Light for me :-)

• To: tesla-at-pupman-dot-com
• Subject: Re: First Light for me :-)
• From: "Barton B. Anderson" <tesla123-at-pacbell-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Tue, 22 Feb 2000 22:02:52 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

> Original Poster: "Neal Whitaker" <NDWhitaker-at-Worldnet.att-dot-net>
>

Hi Neal,

I just replied to Bryan about John's spark length equation for input watts
and made a comment stating that sometimes my personal calc is right in-line
with his, and sometimes I'm way off. I threw in your coil specs (lot's of
info - thanks) and here is one of those coils where I am way off. According
to input watts, you "could" acheive 39.5 inches, but I came out to only 14
inchs. The reason? Because Ctop want's to be about 20pF for your system (~ 3
x Cself) and your salad bowls are about only 25% of this or less. It tells
me that your breaking out too early. I would recommend putting on a toroid
regardless of what you use somewhere around a 3" x 20" inch and tapping
somwhere around 10.3 turns. You have a nice set up and the power to charge a
larger top load. I would even go so far as to suggest doubling your cap size
to .025uF leaving the tap at 8 or so turns. I wouldn't go past 2.5uF though
as the effective energy will only decrease because the cap size starts to
roll off in available primary energy . I think you will get more out of this
cap size with 120 BPS operation and get you real close to the 35 - 40 inch
arc lengths. But save that for your MMC. If you build it right, you can get
a great deal of variation in capacitance values to play with. (Oh, no
protection circuit ideas here - haven't really needed one with a pig).

Bart

> <big snip>
>
> Who long of sparks could I expect from this coil?
> How can I fix my Spark Gap Problem?  Will the MMC help or hurt this?
> Any ideas on the protection circuit?  My understanding is chokes are now
> taboo which is what I was going to use.
> Did I forget anything??
>
> Thanks for everything.
>
> Neal
> NDWhitaker-at-worldnet.att-dot-net
>
> P.S.  I am still working on all of the NST's I have acquired and as soon
> as I figure them all out I will contact the group and all of the folks
> who have requested some of them.  I have not forgotten about any of you.

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