RE: [TCML] Interesting Coil Wrap

["S&JY" <youngs@xxxxxxxxx>]

Jim, you are correct regarding the secondary winding.  If you can GUARANTEE
the only streamers will be between one end of the secondary and the other
end, then you don't need a mid-point ground.  HOWEVER, if a streamer jumps
from one secondary end to ground, then the other end of the secondary most
likely will arc to the primary, unless the secondary midpoint is RF
grounded.  Best to ground the midpoint.

--Steve Y.

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Jim Mora
Sent: Sunday, August 03, 2008 6:52 PM
To: 'Tesla Coil Mailing List'
Subject: RE: [TCML] Interesting Coil Wrap

Hi Jeff,

Was this a misprint? I thought a bipolar (1/2 wave) coil is usually wound in
the same direction to 2x the usual 3.5-5:1 ratio. A space may be provided at
the mid point to control the coupling. The advantage of this configuration,
if I am not mistaken, is that no RF ground is needed at the midpoint. Please
correct me if I am off on this as I want to build one of these. And I have
read several conflicting responses over the last couple of months.

Thanks,
Jim Mora


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