Unlike most of you I am not formally educated. (I have some college).I’m 69 years of age and retired. I’ve always had an interest in Electronics, Electrical and Physics in general. My technical background was gained mostly from many years of hands-on work experience.
I started out working in...
My recall is not that good. I’m guessing the process sequence was:
Use Mechanical pump ( to 10 microns).
Isolate
Then molecular Seive (to ?? Torr) The decrease in pressure would indicate the oil molecules had decreased?
Isolate
Then Vac Ion pump to 10x-14 torr
That would make sense. The...
im trying to jog my memory back 30years when I worked with vacuum tubes. I worked with manufacturing of image tubes. I remember the vacuum systems used vac-ion pumps to achieve -12 power torr. I alsoo remember first using a molecular seive for roughing,pumping to 10 microns.
The seive was a...