Re: 3000 turner

["Luc" <ludev-at-videotron.ca> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

Hi Mark

Has John said it could work perfectly but I'm the kind of guy who prefer to
have on a belt and suspenders, a coil form like yours is costly and a lot of
work. A coil arcing inside is most of the time good for scrap. But as John
mention he don't use it and that a good approach too: The top load "toroïd" is
suppose to shield the coil. Personally I put a polyurethane foam inside my
coil I don't remember the name and cie this stuff is a mix of two compound you
put it in the coil and it start to inflate and heat. I don't know the price of
that stuff the guy at the decoration shop at my job always fill my coil, but I
never build a big coil .

That's just my opinion .

Luc Benard (Montreal)

Tesla list wrote:

> Original poster: FutureT-at-aol-dot-com
>
> In a message dated 8/27/00 11:55:31 PM Pacific Daylight Time,
> tesla-at-pupman-dot-com writes:
>
> > Original poster: "Metlicka Marc" <mystuffs-at-orwell-dot-net>
> >
> >  hello all,
> >  i am having dilemmas on whether to use this enameled steel lid for the
> >  toroid mount on this secondary. on one hand i am afraid that it would
> >  cause an arc to race down the inside of the form? on the other hand if i
> >  use a long nylon screw and nylon spacers and washers to isolate the
> >  topload from it, it might make a nice corona ring?
> >  i need some input on this please? i could make a plastic plug for it but
> >  it looks pretty good on there.
> >  marc
>
> Marc,
>
> I've never had any problems with sparks jumping down inside the form,
> even with no cover on the top of the form at all.  I never use a cover,
> you can look straight down through the form and look out the bottom
> on my coils.  Even with 65" sparks from a 23" secondary at 120 bps,
> no sparks jumped internally.  I'm not sure what might happen as
> the power is raised even more.  Generally I've got racing sparks
> externally rather than internal sparks as I've raised the power.
> My guess is that the metal cover will be fine.
>
> John Freau