RE: AMRAD Spark Gaps

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

Original poster: "John H. Couture by way of Terry Fritz <twftesla-at-uswest-dot-net>" <couturejh-at-worldnet.att-dot-net>


Terry -

Thank you for this post. This is the first time my new (1999) computer has
shown me what it can do with graphics in Excel. Your excellent drawing
showed up beautifully. There are so many things I have to discover about
this computer. The Tesla List is a great place to learn about one's computer
in addition to learning about Tesla coils.

John Couture

--------------------------------


-----Original Message-----
From: Tesla list [mailto:tesla-at-pupman-dot-com]
Sent: Sunday, December 24, 2000 6:53 PM
To: tesla-at-pupman-dot-com
Subject: RE: AMRAD Spark Gaps


Original poster: "Oxandale, Terry by way of Terry Fritz
<twftesla-at-uswest-dot-net>" <Toxandale-at-SPP-dot-org>

Here is a very simple picture I drew up (Excel needed to view) of the
gap I made.


http://hot-streamer-dot-com/TeslaCoils/Misc/Quenched%20gap.xls

Terry (Un-Terry)

> ----------
> From: 	Tesla list[SMTP:tesla-at-pupman-dot-com]
> Sent: 	Sunday, December 24, 2000 5:23 PM
> To: 	tesla-at-pupman-dot-com
> Subject: 	Re: AMRAD Spark Gaps
>
> Original poster: "Ed Phillips by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <evp-at-pacbell-dot-net>
>
> Tesla list wrote:
> >
> > Original poster: "Oxandale, Terry by way of Terry Fritz
> <twftesla-at-uswest-dot-net>" <Toxandale-at-SPP-dot-org>
> >
> >         The temperature rating was very low (I'm sure, because the
> > gaskets were designed to operated in an oil bath that I would expect
> > never see 50 degrees C. I only used them because they were soft
> enough
> > to crush and seal tightly, and because I had never built one and
> never
> > expected the large improvement over the stationary SG performance.
> The
> > pieces were pressed using (I'm going on memory here) a large washer
> on
> > top and centered over the brass disc and a smaller washer was
> centered
> > under the disc. the small washer OD was about 1/4" smaller than the
> > larger washer ID, thus when pressed, it formed a small round but
> flat
> > protrusion in the middle of the disc (again, like a dinner plate).
> If I
> > could find a high temperature plastic or fiber washers to seal these
> > "units", this thing would be worth redoing. It was interesting in
> that
> > when I would rebuild these washers, inspection of the discs revealed
> a
> > very uniform arcing pattern over the entire protruded portion (1.5"
> > diameter) of the disc. I did find that the expansion of the convex
> > surface did close up each individual gap a slight amount after
> warming
> > up thoroughly. I can look up the article date or send a Excel
> drawing of
> > the if wanted. It was a very simple device, and made with very basic
> > materials and tools, but worked very well. There is no telling how
> much
> > better a professionally designed one would work.
> >
> >         Terry
>
> 	Would be very much interested in more details and a photo, if
> possible.
>
> Ed
>
>
>