What is Gettering in vacuum?
What is Gettering in vacuum? A getter is a deposit of reactive material that is placed inside a vacuum system, for the purpose of completing and maintaining the vacuum. Thus the getter removes small amounts of gas from the evacuated space. The getter is usually a coating applied to a surface within the evacuated chamber. Are old TV vacuum tubes worth anything? Common tubes manufactured in the late 1950s or 1960s used primarily in televisions currently have little or no value. I have trouble selling a box of 100 mixed TV tubes for even $10 at swap meets. If it's...