The performance characteristics of vacuum-tube amplifiers are analyzed by combining the fundamental relations governing the motions of electrons within the vacuum tube with the methods of ...

This article gives a brief overview of the common vacuum electronic tube amplifiers used in high-power transmitters. Only three types of devices [travelling wave tubes (TWTs) including helix and ...

It’s the same feature found on the $400 Shark PowerDetect Vacuum I use, and it’s been a lifesaver in my pet-filled house. Normally $130, Amazon put the Mhrmhr stick vacuum on sale for just $85.

hamster vs robot Vacuum Cleaner in a Maze! Who is the BEST? In today's video we will find the answer who is the most advanced creature - cute little hamster or modern robot :) We built 2 same maze ...

How Desi Arnaz finally gets his due in ‘The Man Who Invented Television’ Long overshadowed by his talented wife Lucille Ball, with whom he created 'I Love Lucy,' Arnaz is seen in Todd S ...

Trash sucks: A Norwegian city uses vacuum tubes to whisk waste away Bergen, Norway, has been building one of the world’s most advanced trash systems in its 955-year-old city center.