Re: Overcoupling?

To: tesla-at-pupman-dot-com
Subject: Re: Overcoupling?
From: "Barton B. Anderson" <mopar-at-uswest-dot-net> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)
Date: Wed, 05 May 1999 11:54:18 -0600
Approved: twftesla-at-uswest-dot-net
Delivered-To: fixup-tesla-at-pupman-dot-com-at-fixme

Hi Gary,

> Original Poster: Gary Lau  03-May-1999 1507 <lau-at-hdecad.ENET.dec-dot-com>

> If the main consequence to overcoupling is damage to one's secondary from
> the sparks that race along the length of the secondary, could this be
> helped by adding several disks of an insulator, say LDPE, along the
> length of the secondary, disk ID tightly hot-melt glued to the secondary,
> to effectively increase the top-bottom surface length of the secondary?
> I seem to recall seeing this done on someone's wep page, no idea who that
> was.  Same idea as on the ribbed HV insulators we see on pigs, NST
> bushings, etc.  In clear acrylic, it had that kind of futuristic, Jetsons
> look to it too!
>
> Gary Lau
> Waltham, MA USA

I think your referring to one of Robert Stephens' coils. Robert did this to
increase
the creepage path along the outside of the resonator. Robert's coil is an
astonishing performer! I don't know if the rings allow a bit more coupling
(doubt it
as too much coupling can have negative results just as undercoupling - I think
<grin>). It probably is more of a precautionary measure, but only Robert
can really
answer that. Anyway, for those of you who haven't seen Robert's coils,
there is a
slew of photo's at my web page. This url will take you right to Robert's
specific
coils. Have fun!

 http://www.geocities-dot-com/CapeCanaveral/Hangar/3108/rwsmap3.html

Bart