开云体育

Looks like I stirred up the pot again... I read the History of Vacuum several months ago and recommend it highly! As far as giving up the moderator position...??? There's nothing to moderate, so far

Those pumps must be huge to suck those tanks down to -6 or so! I have a 30" +/- inch dia tank 3 feet high and wonder if my Diff pumps can do the job... I'll get to try it if I ever find a house here

Some of the posts have been vary helpful to me, I shut down my shop because I decided to retire and get a real job so all of my stuff is buried in storage. Ill be finishing the chamber as soon as I

http://svc.org/H/HISTORYA.PDF: Don Mattox -- ____________________________________ Donald M. Mattox Technical Director Society of Vacuum Coaters 71 Pinon Hill Place NE Albuquerque, NM 87122-1914

Dear Ken Sure would like to do some vacuum deposition or coating...I have four retorts that are 5 Ft. Diameter X 9 Ft. long and they are just sitting there waiting for me to do something!!! Lots of

What a boring group! Can anyone give me a reason to keep it going? There must be someone out there that is doing some vacuum work! Ken Hunter

wrote: Alberto, Welcome... I am the owner and moderator of this YAHOO Group, I am also the owner/moderator of an Amateur Telescope Making Group on YAHOO. Check us out:

--- Hi Charles Mitchard: About annealing the glass i have some experience, I have an oven for crt(cathode ray tubes) procesisng which can reaach more than 430 centigrades. The temperature of 430

--- RON WHITE: I was wrong when I said 120 mm, it is 1200mm!! And your brain is OK, because you found the error! I will measure the Sagia of the 21" glass as you said, and will report it to you. The

Charles I've had to back burner my vacuum stuff because I've decided to retire from my day job which included a 3500 sq ft shop to play in right now i'm moving stuff into storage untill I can find a

Thanks Ron, I guess I had better start looking for gauges now so we can play (again) I just got lost in thought. It was unfamiliar territory.

Charles This is all just a guess The small inlet size to these pumps will be a problem. As the vacuum gets low it takes a long time for the air molecules to move from one end of a pipe to the other.

Alberto Polarized light filters are available at some surplus optics company or from theater lighting filters. You can use the light from a LCD monitor and a pair of polarized sunglasses The light

Hi AGUSTIN, I have considered using the front screen of a tv before but it didnt break where I wanted it. However I came to the conclusion that the best way to proceed would be to first 1. trepann out

Hi, is it worth using sealed fridge motors for a vacuum chamber? I have three available just sitting there doing nothing and as I cannot afford (swmbo wont release funds) a roughing pump I wondered if

"AGUSTIN GASPARINI" <teveotron@...> wrote: Good. That helps. I'm not an expert but two things come to mind. (1) a pair of polarized sunglasses can be taken apart to make two polarizers, or (2)

> 12 millimeters (1/2 inch) is pretty thin for any > sizable mirror. You might > get away with it for a small mirror if you are > careful and the glass is not > tempered (which would surprise me from

Hi Alberto Stability = I mean lack of stress - Worst case example is tempered glass- the glass is quickly cooled usually a blast of cold air to both sides of the glass the outside cools quickly and

"AGUSTIN GASPARINI" <teveotron@...> wrote: 12 millimeters (1/2 inch) is pretty thin for any sizable mirror. You might get away with it for a small mirror if you are careful and the glass is not

--- RON WHITE <ron_white@...> wrote: Hello Ron, I am glad of your answer. When you talk of stability of the glass, it is about temperature or other factors? Respect the thickness of the