Vacuum tubes fueled a technological revolution ... an arbor press and simple forms he fabricates for the purpose. Two glass components are used, the dome itself, and feedthrough stems that ...

showing how to make a vacuum tube by hand. The page and captions are in french, but it’s pretty interesting to watch. A small spot welder, some fairly basic glass working tools and a vacuum ...

Röntgen was originally trying to find out whether cathode light rays - invisible streams of electrons, that could only be seen in glass vacuum tubes - could actually pass through the glass.

A vacuum tube is just that: a glass tube surrounding a vacuum (an area from which all gases have been removed). What makes it interesting is that when electrical contacts are put on the ends ...