Re: AMRAD Spark Gaps

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

Original poster: "Luc by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>

Hi Ducan

I make a fast search on the web and found : silicon rubber O-ring can stand
500° F some 600°F , Viton
are good for 16 hours at 600°F.

Luc Benard

Tesla list wrote:

> Original poster: "Dr. Duncan Cadd by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <dunckx-at-freeuk-dot-com>
>
> Date: 25 December 2000 04:27
> Subject: Re: AMRAD Spark Gaps
>
> Hi Luc et al!
>
> >Original poster: "Luc by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <ludev-at-videotron.ca>
> >
> >Hi Terry
> >
> >I remember reading that they used mica gaskets in most of
> old quench spark gap.
> >
> >Luc Benard
> >
>
> So they did.  And so did I when I built mine.  A real pain.
> A right royal major pain.  Mine started out as two inch
> diameter disks 1/16 inch thick.  With an 80 tooth-per-inch
> piercing saw I converted them to washers.  With a sheet of
> sandpaper stapled to a piece of wood I sanded them down to
> around 1 - 1,1mm thin.  Lost some fingerprints and blood in
> the process.  With my Unimat 3 and a grindstone I got them
> very nearly flat and parallel.  I started with 40 disks.  I
> got 15 or so washers.  I smeared silicone high vacuum grease
> (stable to over 200C) on them to seal them against the gaps.
>
> They *still* leak ;-)
>
> Webpage coming "real soon now" but probably not this year
> :-)
>
> Dunckx