NST Filter and Spark Gap Resistance

• To: tesla-at-pupman-dot-com
• Subject: NST Filter and Spark Gap Resistance
• From: Terry Fritz <twftesla-at-uswest-dot-net>
• Date: Sat, 31 Jul 1999 21:50:13 -0600
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi All,

	I was testing my spark gap without the secondary in place tonight.  As it
turns out my new rotary presents about 1 ohm of resistance to the primary
circuit and not 2.5 as I thought (that was the old rotary gap resistance).
I must have done something right on the new gap :-))

I also measured the waveforms before and after my NST filter to verify that
it was working.  A graphic with the details is at: 

	www.peakpeak-dot-com/~terryf/tesla/misc/Filter.jpg

The actual noise from the gap is much higher than I expected (but I am not
surprised).  However, the filter is designed to filter even the full
primary waveform (as in NST across the primary cap use) so it still does great!

Cheers,

	Terry

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