??????? Does anybody from the group knows how much will cost to build one mirror coating vacuum chamber?machine?which can handle maximum 24" telescope mirror blanks? The parts can be bought lets say some?used if availible from E-bay or other companies which offer them and some new if it is better to be new than used. I think I should be able to do all the work to build it and of course with some help from the local shops. The coating machine should not be state of the art, but also not to give low quality of the coatings.?I am interested to get good quality coatings for reasonable price.
On Sat, Nov 17, 2012 at 5:35 AM, grossmann200 <> wrote:
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Hi everybody,
I'm a new guy in the group. I joint this, because I have serious plans to build my own vacuum-chamber (10E-5 to 10E-7 mBar).
I decided to go with a diffusion pump and a system as already decribed by "atm_ken_hunter" under the "Files" section in this group.
Following link shows a screenshot of the basic concept I want to build (taken out from the File posted by "atm_ken_hunter"):
In that concept a "baffle" is indicated. I wonder, how such a "baffle" looks like, how complicated it is, how it works and functions etc.
I am even more curious about that "baffle" because in Ebay is an auction, where somebody points out, that he is
selling a diffusion pump together with a "baffle" and that the "baffle" alone would already costs 2000.- Euro (approx. 2500.- US$ !!!).
Wow, something that expensive was not on my bill-of-material list so far.
Where can I learn more about "baffles", their function and design, and how to get a or build a "cheap" one.
Thanks everybody for your support. Cheers Alexander
