Penta Laboratories, a manufacturer in Newbury Park, Calif., makes vacuum tubes for radio transmitters and other purposes.

Abstract: The vacuum tube train can break through the difficulties of wheel-rail resistance, air resistance and noise of traditional wheel-rail railways. It can reach ultra-high speed of more than 600 ...

China is developing a next-generation maglev system designed to reach 1,000 km/h by combining magnetic levitation with low vacuum tube travel. This video breaks down how it works, why it goes far ...

Abstract: With the development of conventional wheel high speed railway, the Vacuum Tube High-speed Flying Train (high-speed flying train) has gradually entered people's vision. In order to guarantee ...

Second generation écoute vacuum tube wireless noise cancelling headphones improve comfort and sound in a slightly modified design. What if headphones were not trying to imitate a hi-fi system but ...