Re. Resonance

• To: tesla-at-pupman-dot-com
• Subject: Re. Resonance
• From: Gary Lau 21-Jan-1999 0804 <lau-at-hdecad.ENET.dec-dot-com> (by way of Terry Fritz <twf-at-verinet-dot-com>)
• Date: Thu, 21 Jan 1999 17:04:03 -0700
• Approved: twf-at-verinet-dot-com

>Original Poster: Philip <shadow42-at-totcon-dot-com>
>
>I have recently been trying to determine resonance of my coil. I dont
>really know what value it has, but ive seen that quite a few people have
>measured theirs.  Does 243khz sound reasonable for a 4.5 x 20" coil?
>Thanks Philip Mac Duffie

You didn't say what you had for a top load.  My secondary is similar:

4.25"D x 23.25"L (winding length) 22 AWG wound on 1/16" wall dried/sealed
PVC drain pipe.  Many layers polyurethane.  Low voltage self-resonant
with no topload at 489 KHz.  With 4.5" x 15.5" toroid, Fr is 290 KHz.
With additional 6.25" x 24" toroid, Fr is about 205KHz.

Regards, Gary Lau
Waltham, MA USA

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