For most of us, vacuum tubes haven’t appeared in any of our schematics or BOMs in — well, ever. Once mass-manufacturing made reliable transistors cheap enough for hobbyists, vacuum tubes ...

[Aleksander Zawada] makes vacuum tubes in his home ... on the short list of hackers who can pull off extreme industrial manufacturing at home. Kudos.

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 ...

Image credit: Handbook of Modern Sensors Ionization gauge Vacuum gauges which use ions are similar to vacuum tubes. The relationship between the ion current and the filament is a nearly linear ...

The telephone company had problems with vacuum tubes, too, and hoped to find something ... but knowledge about how they worked was scant, and manufacturing semiconductors was difficult.

After a brief review of the history of the K2-W vacuum-tube op amp, an LTspice model is used to create its schematic in ...

Venturi vacuum generators create vacuums using a venturi chamber designed to move gases or fluids out of a region of space. Venturi or fluid jet vacuum generators rely on the flow of compressed air, ...