De Forest put a metal grid in the middle of the vacuum tube. By using a small input current to change the voltage on the grid, De Forest could control the flow of a second, more powerful current ...

The men who design electronic nervous systems would like a vacuum tube without these faults. Last week Bell Telephone Laboratories demonstrated a small, simple device that can do many of the jobs ...

There are industrial applications in which vacuum devices are very much still ... that if you are searching for an obscure 1050s small-signal RF tube you’ll be out of luck; these are mostly ...

Researchers based at The University of Manchester have demonstrated a new method for imaging live chemical reactions with atomic resolution using nanoscale test tubes created using ... dry samples ...

The Blestan Cordless Handheld Vacuum Cleaner is a popular choice among Amazon shoppers, with more than 1,000 purchased in the ...

The importance of this small item gradually sank in. The transistor was a solid (thus the term "solid-state technology") but had the electrical properties of a vacuum tube. Yet it had none of the ...

Analysis The early 1940s saw the first vacuum tube computers put to work solving ... degree with Europe's Lumi supercomputer, ...

These typically include rinsing the brushroll, vacuum tubes and dirty water tank, and spinning the brushroll to remove excess water. Dirt detection indicates that the combo vac-mop has a "dirt ...

Walmart’s selection of on-sale vacuums includes Inse’s lightweight cordless stick model with a six-in-one design for 75 ...

A pocket-size gizmo that puts the "pop" in microwave popcorn could soon fuel particle accelerators of the future.

A cordless vacuum is easier for cleaning small spaces or stairs ... potential for cartoon-like vacuum hose antics. The nozzle tube is also telescopic, which makes cleaning dusty ceiling fans ...

[marco] sent in this video (scroll down) showing how to make a vacuum tube by hand. The page and captions are in french, but it’s pretty interesting to watch. A small spot welder, some fairly ...