Re: primary position (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- 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
>
>
>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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