Re: Small coil questions?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Jim Lux <jimlux-at-earthlink-dot-net> 

At 08:09 AM 12/8/2003 -0700, you wrote:
>Original poster: "Kreso" <kreso.bukvic-at-kc.htnet.hr>
>The 3 mm is outer diameter so can i use it? What should be the space from
>first primary turn to the secondary?



Yes, you can use 3mm od (That's like AWG 8 or 10).   2-3 cm gap from 
secondary to inside of  primary is probably a good value.  If you've 
calculated your primary to be, say, 10 turns, and you're putting 20kV peak 
across it, you'll have about 2kV/turn, which means that you should make the 
spacing between turns at least 3 or 4mm (that's edge of wire to edge of 
wire.... center to center would be 3mm more...).  More likely, your turn to 
turn spacing will be determined by how you're attaching the tap.  Remember 
you want that 3-4mm clearance between the tap/cliplead/etc, and the 
adjacent turns...   A spacing of 10mm wouldn't be a bad idea.


>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Monday, December 08, 2003 12:38 AM
>Subject: Re: Small coil questions?
>
>
> > Original poster: "Jim Lux" <jimlux-at-earthlink-dot-net>
> >
> > Pretty much the same results from 3mm and 6mm tubing (is that inside
> > diameter or outside...)
> >
> > Best to make the relative heights of secondary and primary adjustable, so
> > that you can change it if you discover in testing that you are over or
>under
> > coupled.  Some small plastic blocks or sections of plastic pipe might work
> > well
> >
> > ----- Original Message -----
> > From: "Tesla list" <tesla-at-pupman-dot-com>
> > To: <tesla-at-pupman-dot-com>
> > Sent: Sunday, December 07, 2003 10:11 AM
> > Subject: Re: Small coil questions?
> >
> >
> >  > Original poster: "Kreso" <kreso.bukvic-at-kc.htnet.hr>
> >  >
> >  > Can i use 3 mm copper tubing and obtain same results as with 6 mm?
> >  > Where should first turn of secondary be? With same level as beginning,
> >  > middle, end of first turn of primary?
> >  >
> >  > Thanks
> >  >
> >  >
> >
> >