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 ...

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 ...

In what feels like news straight out of 2016, a Hyperloop testing facility in Europe has completed the longest-ever vacuum capsule journey. The milestone could bring this oft-forgotten promise of high ...

Volume unit (VU) meters are cool — it’s an undeniable fact. For some reason, humans just dig lights that flash along with sounds. You can build a VU meter using LEDs, or bulbs if you’re trapped in ...