Mike,
Use GE Silicon Type II adhesive. It is sold in most hardware stores and
also carries the label "Household Glue". That's what I use on my mirrors.
Michelle
> -----Original Message-----
> From: sf-bay-tac-bounces@No-Spam
> [mailto:sf-bay-tac-bounces@No-Spam] On Behalf Of Mike J. Shade
> Sent: Wednesday, March 02, 2005 8:41 AM
> To: sf-bay-tac@No-Spam
> Subject: [TAC] (OT) RTV and secondary mirror
>
> I'm going to reattach the 4.5" secondary mirror for the 12.5"
> Ritchey-Chretian. It looks like there were three cork pads,
> about 1.5" and these were glued to the back plate and the
> mirror was glued to these...I'm thinking that three buttons
> or RTV might be a better choice, about the same spacing but
> perhaps not quite as large...anyone have any thoughts on
> this? Might it be better to put a thin bead at the edge?
> More cork (which I suspect might have been stressing the
> mirror a bit)?
>
> Clips are out of the question...
>
> Thanks...BTW. the original cork pads are destroyed and it
> looked like the previous owner used windshield repair cement
> (that yellow looking stuff that dries hard)...it doesn't look
> like RTV...
>
>
> Mike J. Shade: mshade@No-Spam
> Director, Sonoita Hills Observatory, Sonoita Arizona
> www.sonoitaobservatories.org
>
> See work done at the observatory:
> http://c3po.cochise.edu/astro under the "images & photos"
> panel on the left of the page
>
> Fight wasteful and obtrusive outdoor nighttime lighting:
> International Dark Sky Association: www.darksky.org
>
> "I like the dark, it's cheap." Ebinezer Scrooge
>
>
Received on Wed Mar 2 11:27:47 2005