There is nothing simple about a good vacuum tube tester. In fact, most tube testers were very complicated to set up for each different type of tube to be tested. Testing a quantity of different tubes ...

China claims to have become the first country in the world to successfully carry out tests on a Hyperloop-style, magnetically levitated train inside a vacuum tube — or “vactrain” for short — according ...

The first passenger test of the Virgin Hyperloop has been completed in what the company views as a pivotal moment in the future of transportation. Virgin Hyperloop conducted the test at its 500m ...

There’s still a mystique around vacuum tubes long after they were rendered obsolete by solid state devices, and many continue to experiment with them. They can be bought new, but most of us still come ...