Re: Gap Spacing

• To: tesla-at-pupman-dot-com
• Subject: Re: Gap Spacing
• From: FutureT-at-aol-dot-com (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Tue, 06 Apr 1999 01:11:38 -0600
• Approved: twf-at-verinet-dot-com

In a message dated 99-04-05 04:28:57 EDT, you write:

<< Original Poster: Marius Grigoriu <compwiz-at-stratos-dot-net> 
 
> Hopefully everyone can see this message. I have been having some
> problems sending to the list...
> Anyway, I would like to know how wide I can set the main and safety gap
> to squeeze the most power out of my coil without damaging the neon.
> Specs:
> 15kV, 30mA NST
 .0053uF capacitor (Thats calculated, it's probably a little higher in
> reality)
> Primary:
> "Saucer shaped"
> 7.5in inside diameter
> .25" wire diameter
> .25" spacing between wires
> angle is at 15 degrees
 
> Is there anything else you need to know?
 
> Thanks.
> Marius Grigoriu
  >>

Marius,

To squeeze the most out of an NST, the cap must be the largest
that can be tolerated, (probably .007uF, although .006uF seems to 
give the same results), and  a synchronous rotary
usually helps.  You'll also need a large toroid of about 4" by 17" or
5" by 20".  I get 45" sparks from my coil, when I power it using
a 15kV, 30ma NST.

Using static gaps, wide spacings which are needed for the longest
sparks, tend to give erratic operation, and tend to destroy the NST.

John Freau

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