RE: Static Spark Gap

• To: tesla-at-pupman-dot-com
• Subject: RE: Static Spark Gap
• From: "Lau, Gary" <Gary.Lau-at-compaq-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Sat, 15 Apr 2000 08:40:13 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

I have to disagree with the below suggested gap setting.  .02" is a
reasonable gap for each gap in a multiple stage series gap if the total gap
adds up to .15"-.30", but for a single gap this is way too small.  A single
.02" gap will work to an extent, but performance will be poor, as
performance directly correlates with gap width (as does the voltage and
stress to NST's and caps!). 

Gary Lau
Waltham, MA USA

>Original Poster: Parpp807-at-aol-dot-com 
>
>Justin,
>The easiest gap to start out with can be made with a pair of carriage bolts

>that you have mounted so the gap is adjustable. You can eyeball the size of

>the gap or start out with using  drills or a feeler gauge to set a gap near

>0.02 inches. That's a starter for a small coil. You have to mount the gap
on 
>insulated material. The gap will get very hot so 
>you can't use plastic. I use ceramic standoffs. It is not necessary to blow

>air over the gap
>but it does result in a great improvement in the quenching ability. I use a

>15 Amp variac.

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