From: Dale Eason 
To: Guy Brandenburg , tkrajci{at}san.osd.mil
Cc: atm{at}shore.net
Reply-To: Dale Eason 


Although I haven't RTV'd my primary I do use it on my Secondary.  I have
taken it off for re-aluminizing.  I used a razor blade to scrap the RTV off
the back of the diagonal.  It came back from Clausing just fine.

-+- Guy Brandenburg  wrote:
>
> Only one more test:
> What are the results when you re-aluminize a mirror
> that has RTV residue
> here and there? Or will acetone get rid of all of
> it, really and truly?
> Guy B
>
> tkrajci{at}san.osd.mil wrote:
> >>From: Chuck Dethloff 
> >
> >
> >>One thing that I learned from my friends
> experience was that having three
> >>mirror clips instead of only one (which I have
> traditionally done because
> >>the other two seemed redundant) is what saved
> Howard's mirror from being
> >>possibly broken. The OTA was laying flat on back
> upside down when I came
> >>upon it. The mirror no longer supported in it's
> sling was rather now
> >>supported by the upper bumper and tipped forward
> against the two mirror
> >>retainer eye bolts attached to the lower two
> bumpers. Without that
> >>redundancy his mirror would have undoubtedly fell
> forward in the box and
> >>could have been scratched or possibly broken.
> >
> >
> > Some folks are hard sold on the mirror clips and
> sling concept.  When will
> > they let go of the idea?  When it's pried from
> their cold, dead
> > fingers.  ;-)
> >
> > My sixteen inch mirror is RTV glued to a six point
> support.  No slings.
> > No clips.
> >
> > In a manner of speaking it is held in place by
> six, adhesive, shock
> > absorbing, high strength clips.  In my opinion
> that is far better than
> > three mechanical edge clips that let the mirror
> rattle about, and perhaps
> > present a chipping risk during rough transport and
> handling.
> >
> > I don't care what orientation my mirror box takes
> during shipment.  The
> > mirror is bonded to the cell and won't fall out.
> >
> > When I first bonded the mirror to the cell, I
> tested it in stages.  At
> > first I did some gentle tilting of the cell, then
> more tipping.  No
> > problems.  Then I inverted the cell.  Again, no
> problems.  Then I put some
> > weight on the back of the mirror while the cell
> was inverted.  Once again,
> > no problems.  Then I grabbed the cell as if I were
> an olympic athlete
> > preparing for the 'hammer throw'...and whirled the
> cell/mirror about.
> > Still yet again, no problems.  (What other tests
> would folks like me to
> > conduct?...short of damaging or destroying
> componenets)
> >
> > My telescope was shipped out to Tashkent...10,000
> kilometers and three
> > months.  It survived intact, and when I assembled
> it for the first
> > time...collimation was only a little bit off.  Not
> too shabby.
> >
> > Can we please put the mirror clips and sling idea
> to rest?
> >
> > Tom Krajci
> > Tashkent, Uzbekistan
> >
> >
> >
> >
> >
>
>
>
>


__________________________________
Do you Yahoo!?
Yahoo! SiteBuilder - Free, easy-to-use web site design software
http://sitebuilder.yahoo.com

--- BBBS/NT v4.01 Flag-5