Re: ATM Mirror Cell Fabrication Woes

["Bill Kelley" <flex@commspeed.net>]

Herr Schwartz is not dangerously psychotic. He visited me once and I managed
to get him out of the house without being harmed.  Bill

 From  "Richard  Schwartz" <richas@earthlink.net>
To: <mjc5@psu.edu>; <atm@shore.net>
Sent: Thursday, October 23, 2003 2:05 PM
Subject: Re: ATM Mirror Cell Fabrication Woes


>
> Don't believe heresy!   It is clearly established in the definitive three
> volume ATM set, originally published by Scientific American, that you need
a
> home foundary to cast the required parts, and you need a home machine shop
> to machine the parts to the required accuracy.
>
> It must be true.  What more authority do you need than Scientific
American?
> They are the same guys who published that a certain disease in Italy was
> caused by "the night air".   OK, Ok, ok.... that was in 1853.  But way
back
> in the 1600's when microscopes first became available, some guy looked at
> pond water and asked, "Could those critters be making us sick?"   I guess
he
> heard what happend to Galileo and chose not to pursue it.
>
> So, to build the required foundary and tools, I send you to the Lindsay
> Publications catalog, where you will find a simple coal-fired brick-lined
> vacuum cleaner-blown garbage can for melting aluminum for casting.
>
> Pay special attention to the precision fabrication of the mirror clips.
> They must be clamped very tightly, and any imprecision there could inflict
> stress conentrations on your finished mirror, resulting in fracture.
>
> . . . Richrad
>
> ----- Original Message ----- 
> From: <mjc5@psu.edu>
> To: <atm@shore.net>
> Sent: Thursday, October 23, 2003 11:52 AM
> Subject: Re: ATM Mirror Cell Fabrication Woes
>
>
> >
> > >I am converting my 13.1" PDHQ into a Truss scope this winter. The
> > >first task I would like to accomplish is fabricating the mirror
> > >cell. However, I have no metal working experience or tools. Nor can
> > >I find a resonably priced one on the market. Does anyone here know
> > >of a website that details mirror cell construction for the average
> > >joe or of a supplier of reasonably priced mirror cells? Can an
> > >effective cell be made out of wood?