Re: Secondary Construction
Subject: Re: Secondary Construction
From: James Peters <jpeters-at-enterprise.powerup-dot-com.au>
Date: Thu, 5 Oct 1995 16:52:57 +1000
>Received: from ns-1.csn-dot-net (root-at-ns-1.csn-dot-net [188.8.131.52]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with SMTP id AAA27615 for <tesla-at-grendel.objinc-dot-com>; Thu, 5 Oct 1995 00:54:29 -0600
Cc: HOSFORDL-at-CRPL.CEDAR-RAPIDS.LIB.IA.US, MALCOLM-at-directorate.wnp.ac.nz, Rodney-at-Johnxt7.anu.edu.au, bob-at-btckc.demon.co.uk, cshields-at-tyrell-dot-net, jarnold-at-us.oracle-dot-com, jprickett-at-lightlink.satcom-dot-net, mrbarton-at-ix-dot-netcom-dot-com, napier-at-cats.ucsc.edu, pierson-at-msd26.enet.dec-dot-com, seastones-at-eworld-dot-com, sroys-at-radiology.ab.umd.edu
On Wed, 4 Oct 1995 tesla-at-grendel.objinc-dot-com wrote:
> >From MALCOLM-at-directorate.wnp.ac.nz Wed Oct 4 14:43 MDT 1995
> >Received: from ns-1.csn-dot-net (root-at-ns-1.csn-dot-net [184.108.40.206]) by uucp-1.csn-dot-net (8.6.12/8.6.12) with SMTP id OAA09332 for <tesla-at-grendel.objinc-dot-com>; Wed, 4 Oct 1995 14:33:08 -0600
> From: "Malcolm Watts" <MALCOLM-at-directorate.wnp.ac.nz>
> To: tesla-at-grendel.objinc-dot-com
> Date: Thu, 5 Oct 1995 09:31:34 +1200
> Subject: Re: Secondary Construction
> Hi Stan...
> > > >
> MW> > Point taken, but...
> MW> > Can anyone explain why sparks would prefer to travel down the
> MW> >inside of the former (winding) rather than the outside ?
> > >
> SH> thppppppth! Oh, sorry, had to dust off some neurons. I'd guess
> SH> that the magnetic flux density tends to be greater inside the
> SH> secondary, and without the added dielectric of the end caps, arc
> SH> form more easily.
> Thanks for the reply. I am of course aware of the behaviour of
> plasmas in magnetic fields (a la Tokamaks, solar prominences, auroras
> etc.). The reason I ask is because there is a well known photograph
> of one of the MASTER's large coils (in a building) clearly throwing
> sparks twice its height, yet without a plastic former, no sparks in-
> ternally. The coil is clearly effectively suspended in air.
Yes Malcolm, thats a good point! Tesla threw sparks much bigger than the
secondary on his coils and these were open wood forms! Might have
something to do with the space winding?