bipolar coil

• To: tesla-at-pupman-dot-com
• Subject: bipolar coil
• From: Parpp807-at-aol-dot-com (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
• Date: Mon, 28 Feb 2000 21:55:05 -0700
• Approved: twftesla-at-uswest-dot-net
• Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi all,
My centerfed bipolar coil has 21.5 inches of # 28 wound on a piece of 2 inch 
diam PVC.
I have been experimenting with a split primary consisting of two coils, each 
7 turns of 3/16 Cu tubing. Currently, the two primary sections are spaced 
around 2 inches apart. They are mounted so I can adjust their separation and 
this appears to be the optimum spacing altho the tuning effect is very broad 
and not wide ranging. F res is 128 kHz. The arc is a wimpish 5 inches with 
1350 Watts of NST's (now properly phased). :-)) The gap is 0.32 and the MMC 
is 0.022 uF.

Somewhere I have read or seen that the secondary may be wound with a gap at 
its
center. The winding is supposed to traverse a gap of 1-2 inches with just a 
turn or so.
Can anyone give me some info on this?

Happy day,
Ralph Zekelman

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