There’s still a mystique around vacuum tubes long after they were ... [Rob’s Fixit Shop] took a look at a tube tester, once a fairly ubiquitous item, but now a rare sight.

[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.

Find out more about how we test, analyze, and rate ... These headphones to be exact — the écoute Vacuum Tube headphones. I’m going to take you through my time with the headphones and detail ...

during a test of technology crucial to the train's high speed. For the first time it travelled stably through the 2-kilometre low-vacuum tube, according to China's state run Aerospace Science and ...