Back to Home

ATM Forum Message

Forums: Atm · Astrophotography · Blackholes · Blackholes2 · CCD · Celestron · Domes · Education
Eyepieces · Meade · Misc. · God and Science · SETI · Software · UFO · XEphem
RSS Button

Home | Discussion Forums | Amateur Telescope Making | Post
Login

Be the first pioneers to continue the Astronomy Discussions at our new Astronomy meeting place...
The Space and Astronomy Agora
Re: Re: Re: Re: Re: Need Advice About Constructing Vacuum Coating System

Forum List | Follow Ups | Post Message | Back to Thread Topics | In Response To
Posted by Stephen Campbell on December 21, 2000 07:38:26 UTC

Thanks for the info, i found my diffusion pump on ebay,ive been looking for a refridgeration service pump, i think this will work as the backing pump because ive read that these pumps produce a pretty high vacuum .001-.0001 torr,
as far as the bell jar goes, after what crockett said about implosion ,which i had already thought about using an implosion shield, but im leaning more toward using a commercially made bell jar, ive done a yahoo search and found a few companys selling surplus bells for $600 to several thousand
,im hoping to find a small one,perhaps 13" diameter X 20" tall give or take a few inch's for around $200-$300(used),im going to try an build this for under $1000,i have the power supply's also.

Follow Ups:

Login to Post
Additional Information
Google
 
Web www.astronomy.net
DayNightLine
About Astronomy Net | Advertise on Astronomy Net | Contact & Comments | Privacy Policy
Unless otherwise specified, web site content Copyright 1994-2021 John Huggins All Rights Reserved
Forum posts are Copyright their authors as specified in the heading above the post.
"dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET"
are trademarks of John Huggins