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RE: DC Tesla Coil - was rotary spark gap

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

I have a 1/4" sheet of Lexan between the two layers of my primary.  The
arcing I spoke of went from the outer end of one coil, around the edge
of the 22" square Lexan sheet, to the other coil.

Regards, Gary

> -----Original Message-----
> From: Tesla list [mailto:tesla@xxxxxxxxxx]
> Sent: Monday, November 29, 2004 7:01 PM
> To: tesla@xxxxxxxxxx
> Subject: RE: DC Tesla Coil - was rotary spark gap
>
> Original poster: "Malcolm Watts" <m.j.watts@xxxxxxxxxxxx>
>
> FWIW, I use an acrylic sheet between each layer in my stacked
> primaries some of which have a hole cut in the sheet to accomodate
> the secondary. It wasn't clear from your pictures whether you were
> using one or not. I mention it because you spoke of arcing between
> the outer turns and the sheet can extend way beyond that. It also
> allows the layers to be positioned even closer for highest inductance.
>
> Malcolm

> > Original poster: "Lau, Gary" <gary.lau@xxxxxx>
> > I also use a two-layer (copper tubing) primary, but with a fixed
> > geometry and conventional tapping for adjustment. See
> > http://www.laushaus.com/tesla/primary.htm. The two-layer
construction
> > is a great way to achieve a high inductance without an excessively
> > large diameter primary.
>