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 ...

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 ...

Amplifiers that use vacuum tubes instead of – or alongside – solid-state electronics are marketed on the basis of their warmer, more inviting sound. Now Écoute has come up with a very unusual way to ...