RE: Stacked Primarys (Attn Gary L)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>

Hi Scott:

I don't know, but since the difference is unlikely to be much greater
than 1 turn, just factor that into the primary tapping adjustment.  I
think I got that spreadsheet long after my primary was built.

Regards, Gary Lau
MA, USA

> Original poster: "Scott Hanson" <huil888@xxxxxxxxxxxx>
>
> Gary -
>
> How did you interpret the input on line #9 of Pete's spreadsheet,
> "separation of turns"? Center-to-center distance between turns of the
> primary conductor, or air gap between adjacent turns?
>
> Regards,
> Scott Hanson
>
>
>
>
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Sent: Friday, April 14, 2006 2:39 PM
> Subject: RE: Stacked Primarys
>
>
> >Original poster: "Lau, Gary" <Gary.Lau@xxxxxx>
> >
> >Building a stacked primary will definitely give you a much more
compact
> >coil, and use less tubing.  I use one on my coil, details at
> >http://www.laushaus.com/tesla/primary.htm.  You get the biggest boost
in
> >inductance by maximizing the mutual inductance between the two
layers,
> >i.e. keeping them as close to one another as possible.  Just be sure
to
> >use a layer of plastic between the coils with NO holes outside of the
ID
> >or the coils, or else an arc will surely find its way between the two
> >coils.  Also, make sure the sheet extends at least 1.5" beyond the OD
of
> >the coils.
> >
> >Pete Komen wrote an Excel spreadsheet that calculates the inductance
of
> >a 2-layer primary very accurately.  I'll attach it so that Terry
might
> >post in on hot-streamer.com.
> >
> >http://hot-streamer.com/temp/2LayerPrimary.xls
> >
> >Regards, Gary Lau
> >MA, USA
> >
> > > Original poster: "Mike Tucknott" <michael.tucknott@xxxxxxxxxx>
> > >
> > > Hi Terry/Chip
> > >
> > > It`s been a few years since I`v been on the list but I though it
was
> > > time to start
> > > building and I`m in need of a little help.
> > >
> > > I`m building a new big coil and the primary will need to be 40"
dia
> > > if I stack 2
> > > 10 turn coils on top of each other how will this affect the
overall
> >inductance
> > >
> > > And does anybody have any advice on how to build a stacked
primary,
> >i.e. turn
> > > to turn spacing, coil to coil spacing and support structures etc.
> > >
> > > Cheers guys
> > >
> > > Mike Tucknott
> > >
> > >
> > > Smokin in south Oxfordshire UK
> > >
>
><http://freespace.virgin.net/michael.tucknott/tesla.htm>http://freespac
e
> >.virgin.net/mi
> > > chael.tucknott/tesla.htm
> > >
> >
> >
> >
>
>