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Re: AMRAD Spark Gaps



Original poster: "Brian Foley by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ka1bbg1-at-mcttelecom-dot-com>

Hi all, SG's please be carefull about using Viton rubber,I used to mold it
and the stuff can be toxic! it is one elastomer that can handle gasoline
like no other! but fumes from it burning are surely toxic. cul brian
----- Original Message -----
From: Tesla list <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Wednesday, December 27, 2000 1:38 PM
Subject: Re: AMRAD Spark Gaps


> 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
>
>
>
>