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I tried an experiment with spray silvering vs aluminizing. The two methods seem to produce equivalent results, but you have to clean the mirror more carefully with the silvering method. Writeup is

Yeah, seems so (:

Neither did I, oddly. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

Stll here Didn't get the original message

Yup! All the time! In fact I'll be seeing him again tomorrow. -Dave -- Dave McGuire, AK4HZ New Kensington, PA

Dave You still up there in the frozen north :_)))) Ever see our mutual Britt bud ???

Hey Drew! It's good to see your email address in my inbox. :-) -Dave

I still here in sunny FLA.

Yup, still breathing! -Dave -- Dave McGuire, AK4HZ New Kensington, PA

Yup! On Wednesday, June 16, 2021, 01:55:51 AM CDT, Christopher Erickson <christopher.k.erickson@...> wrote: Still here... "My advice is always free and worth every penny!" -Christopher

Still here... *"My advice is always free and worth every penny!"* *-Christopher Erickson* *Observatory Engineer* *Summit Kinetics* *Waikoloa, Hawaii*

*Still here....*

Doesn't sound like that high of a vacuum then, but lots of variables. What's the governing metric? How precisely do you need to control? What's the limiting budget? If vacuum level is the metric,

This sounds like he is trying to use vacuum to pull a parabola on a sheet ..... for that to work you will need a very sensitive feedback loop that is constantly checking on temperature, local

I am not in the process of mirror alluminium Only in vacuum control I use a circle from a byke wheel Put a alluminium sheat over and peut a cover in the back Like this if <I make some vacuum betting I

Can you give a few more details on your chamber/ what you're trying to achieve? Is this a sputtering process?

Turns out I have a 5" diff pump cold trap and plate valve for sale. ?$250 and shipping gets it all. ? Drew in sunny aFLA Sent via the Samsung Galaxy Note? II, an AT&T 4G LTE smartphone

I had a veeco,?I think it was a v 301 system. 16 inch diameter 36in tall Pyrex chamber. Lifter and everything. Had a lot of fun with it doing science with the neighborhood kids and making some

I have a 4" diff pump and cold trap and manual slide valve cheap to vacuum bud. Drew in sunny FLA

I am? a tech? in instrumentation maybe? you can help me i use vacuum? for made some? coupole? Mirror by? put? some vacuum? inther? a schett of milar but? I know? how to? built a pressure