Vacuum tubes fueled a technological revolution ... The components are spot welded to the inside portion of the feedthrough stem, then the glass is fused together, again using a lathe.

[Usagi Electric] is breathtakingly close to having his Bendix G15 vacuum tube computer up and running ... [Usagi] was able to verify this with the test panel inside the machine.

The Vacuum tube is a part of the pre-amp of the headphones, and it warms up the signal before it gets sent to your ears. It’s not identical to the kind you’ll find in retro amps, mind you, and that ...

Amplifiers that use vacuum tubes instead of – or alongside ... But to the best of my knowledge this is the first time it's been put inside a pair of headphones rather than just connected ...

This is an attractive pair of headphones with a modern retro vibe. Then there’s the piece-de-resistance: a vacuum tube inside, similar to the kind you’ll find in an expensive HiFi amp or a ...