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Aloha Mike, Actually I have some staff for sale - Leybold A700 door vacuum chamber (Dia.700 mm x 700 mm) on the frame with assembled gate valve, three way roughing valve, LN2 baffle, and high current

Welcome to the group! The guy you really want to talk to is Drew from Florida, probably about the most similar environment to work in to yours among our members.... I expect your biggest problem will

Aloha group, I live on Hawaii's Big Island and exposed to a very corrosive atmosphere (SO2/H2SO4 primarily). My 20" mirror needs recoating very frequently, and I am looking for a cost-effective

That is a cool video. I have stripped and recoated my 28" ( 230 pounds ) mirrors a few times now. It is not as cool as the movie but still a project. I tend to have tungsten products on my mirror as a

Don

Wow. We strip our mirrors at the NCA_CCCC ATM workshop in a very similar fashion to what they did in this video:

In our setup, the mechanical pump has tubes and valves that connect either to the bell jar or to the rear end of the diffusion pump. I'll have to see exactly where the gauge for the dp is located.

Guy, What do you mean: "when I close connection between the mechanical pump and the diffusion pump"? If you close backing valve and open gate valve, system won't work. Only cryo and other sorption

I suppose I could, theoretically, pump both the bell jar and the diffusion pump at the same time, but I think it would be a bad idea since the dp would rise to 1atm for a while. We get down to about

A weak heater, and not a hyperactive, too-hot one? Hmm.

Just a guess, but that sort of behavior has been linked to a weak heater on the diff pump. The pump oscillates between backstreaming and proper behavior. It's a long shot, but it's been known to

BTW I haven't been able to photograph the haze that sometimes occurs because it hasn't occurred. Guy ________________________________ To: VacuumX@... Sent: Sun, December 26, 2010 3:48:42

Hi, this seems very weird, I dont understand!! 200 mb is very high. Can you pump the bell jar down without bypassing the diff pump? what happens then? Because you can achieve a good final vacuum (how

Our old no-name, government-surplus diffusion pump has a problem. After pumping the diff pump for a while (minutes or hours, doesn't seem to make a difference) and after loading the mirror to be

Hi, There is a somewhat related forum at www.coultersmithing.com/forums/index.php It has vacuum, sputtering, physics, electronics, and even a theory and rag-chewing section. Check it out. -bill

I have a couple of old (old, old) Danielson-Tribodyn pump stations. Danielson is defunct. Ideal / Pchemlabs services them, but after a couple of go-rounds with them, I'd rather service my pumps

Guy, We use the following main techniques to clean parts before coating: 1. Small parts we clean manually using Cerium Oxide powder ZOX-CE89 from Ferro Electronics Materials, then acetone. 2. Big

Atiila, We use Ultra High Purity O2 and Ar from Airgas. Regards, Vladimir

Guy... Take a look in the Group's files section. At the top of the list is an example of -HOW TO- prepare the glass for the chamber. At least it is how they used to do it at Mount Stromlo in

Hi! I made a slight change on the eBay listing of our auction for the coater we have for sale. There is still no minimum bid, but there is a small reserve on the auction, to cover the cost we had on