[Prev][Next][Index][Thread]
Re: Discharge terminal (fwd)
---------- Forwarded message ----------
Date: Sun, 02 Mar 1997 14:11:44 -0800
From: Bert Hickman <bert.hickman-at-aquila-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Discharge terminal (fwd)
Tesla List wrote:
>
> ---------- Forwarded message ----------
> Date: Sun, 02 Mar 1997 13:21:54 -0800
> From: Calle Laakkonen <laakkone-at-icenet.fi>
> To: Tesla List <mod1-at-poodle.pupman-dot-com>
> Subject: Re: Discharge terminal (fwd)
>
> Tesla List wrote:
> >
> > ---------- Forwarded message ----------
> > Date: Sat, 01 Mar 1997 18:01:53 -0800
> > From: Bert Hickman <bert.hickman-at-aquila-dot-com>
> > To: Tesla List <mod1-at-pupman-dot-com>
> > Subject: Re: Discharge terminal (fwd)
> >
> > Tesla List wrote:
> > >
> > > ---------- Forwarded message ----------
> > > Date: Sun, 27 Feb 1994 15:05:35 -0800
> > > From: Calle Laakkonen <laakkone-at-icenet.fi>
> > > To: Tesla List <tesla-at-pupman-dot-com>
> > > Subject: Discharge terminal
> > >
> > > What is a good discharge terminal for a small coil
> > > sphere or toroid ?
> > > How can I build one ?
> > >
> > > -Calle
> >
> > Calle,
> >
> > Although either type will add capacitance to the top of the coil, a
> > toroid will provide better "shielding" for the top of your coil. As long
> > as you build a toroid that's significantly larger in outside diameter
> > than the coilform diameter, and as long as you don't mount it too high
> > above the top of your coil, it will prevent corona breakout off hte top
> > of the winding. Most higher power coilers use, and prefer, toroids.
> >
> > The easiest way to make a toroid is from a couple of pie pans and some
> > flexible aluminum ducting that's typically used for clothes dryer
> > ducting. I've copied part of an earlier post that describes how this
> > type toroid is made:
> >
> -snip-
> > Hope this helps! Safe coilin' to you, Calle!
> >
> > -- Bert --
>
> Thanks !
> I have heared that if you put a sharp point on your toroid then
> it will make much bigger sparks. Is this true ?
>
> -Calle
Calle,
It is true that any small projection that casues a concentration of the
electric field on the toroid will cause it to preferentially break out
at that point. A small raised aluminum foil "bump" or a small nail of
screw pointing upward will do this quite well. The toroid will tend to
make the sparks somewaht heavier/brighter perhaps, but I've found that
not having any objects on the toroid makes for the best overall
streamers once the power level is high enough to make the toroid "break
out" by itself.
Safe coilin' to you!
-- Bert --