Re: primary position (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Tue, 19 Jun 2007 19:48:38 -0400
From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: primary position (fwd)

Your welcome, I believe this coil was made by Ed Wingate, I found it on 
Terry Blake's Teslathon webpage, (I'm sure he won't mind me showing off his 
stuff), lots of other cool pictures as well.
http://www.tb3.com/tesla/teslathons.html
For your enjoyment.
Scott Bogard.

>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: primary position (fwd)
>Date: Tue, 19 Jun 2007 17:01:55 -0600 (MDT)
>
>
>---------- Forwarded message ----------
>Date: Tue, 19 Jun 2007 19:06:13 -0400
>From: Marko Ruban <Marko@xxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: primary position (fwd)
>
>Nice picture.  Exactly what I had in mind.  Thanks Scott.
>
>
>Tesla list wrote:
>
>---------- Forwarded message ----------
>Date: Tue, 19 Jun 2007 16:59:44 -0400
>From: Scott Bogard <teslas-intern@xxxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: primary position (fwd)
>
>Marko,
>      I think I have seen coils like this, I would assume that it would
>improve efficiency, as there would be no ground, but It would have to arc
>from one end of the coil to the other to see this efficiency improvement
>(like twin coils).  See this picture.
>http://www.tb3.com/tesla/ratcb2006/pages/BD_0259.html
>Once again, correct me if I'm wrong guys.
>Scott Bogard.
>
>
>
>
>From: "Tesla list" <tesla@xxxxxxxxxx>
>To: tesla@xxxxxxxxxx
>Subject: Re: primary position (fwd)
>Date: Tue, 19 Jun 2007 13:16:08 -0600 (MDT)
>
>
>---------- Forwarded message ----------
>Date: Tue, 19 Jun 2007 15:12:31 -0400
>From: Marko Ruban <Marko@xxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: Re: primary position (fwd)
>
>In that case, would a middle grounded secondary with primary around same
>location, be more efficient than the traditional primary/secondary bottom
>grounded?
>
>
>Tesla list wrote:
>
>---------- Forwarded message ----------
>Date: Tue, 19 Jun 2007 07:51:15 -0400
>From: "Lau, Gary" <Gary.Lau@xxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: RE: primary position (fwd)
>
>
>
>
>
>Date: Mon, 18 Jun 2007 14:41:47 -0400
>From: Marko Ruban <Marko@xxxxxxxx>
>To: Tesla list <tesla@xxxxxxxxxx>
>Subject: primary position
>
>All of the cylindrical secondary designs I've seen (which is not
>
>
>many),
>
>It seems to me that >99% of all coils that I've seen DO use cylindrical
>secondaries...
>
>
>
>place the primary coil at the bottom of secondary.  Would placing the
>primary at the center of secondary improve TC efficiency, by letting
>
>
>the
>
>
>secondary take advantage of the lower part of magnetic field produced
>
>
>by
>
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>primary?
>
>
>Two problems with this.  Since the base of the secondary is grounded,
>the mid-point would be at a potential of half its peak voltage, and it
>would want to arc to the nearby primary coil.
>
>Also, the pri-sec coupling would likely be too high, resulting in racing
>arcs on the secondary coil.
>
>Bipolar coils, where neither end of the secondary is grounded, do have
>the primary at the secondary mid-point.
>
>Gary Lau
>MA, USA
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