The outer body is a brass tube with the logo etched through ... were added to the core to light up the battery from the inside. We have to hope the vacuum this is supposed to attach to is equally ...

Normally, vacuum tubes rely on a resistive heater to eject ... [J.G.] is powering this amplifier with a battery outputting 5V via a USB connection, and driving a fairly standard set of speakers ...

Tineco's Pure One A50S Plus is a solid cordless vacuum cleaner with some clever features and a super strong suction. However, ...

There are a couple of reasons I suspect it's taken this long to see a vacuum tube in a pair of headphones. Tubes are hungry ...