A vacuum tube is just that: a glass tube surrounding a vacuum (an area from which all gases have been removed). What makes it interesting is that when electrical contacts are put on the ends, you can ...

Marked: "DAYRAD Tube Checker / Mfd. by the Radio Products Co., Dayton, Ohio. / Licensed Under Weston Patent 1704566 Type B". Includes leather carrying strap. Tube tester designed for A.C. plug in ...

We're monitoring the early sales to bring you the best Black Friday vacuum cleaner deals on all types of vacs. Whether you're after a trusty corded vacuum, a flashy cordless model, or even a robot vac ...

Watch as one skilled fisherman turns simple bamboo into the perfect eel trap. Using only natural materials and patience, he catches a giant freshwater eel and prepares it over an open fire. This solo ...

Abstract: The vacuum tube high-speed flying train (high-speed flying train) is a novel rail transportation technology. The maglev train can run with low mechanical friction, low air resistance and low ...

As with many inventions, two people had the idea for an integrated circuit at almost the same time. Transistors had become commonplace in everything from radios to phones to computers, and now ...

Kirsty Gallacher 's boyfriend has led a wave of support for the TV presenter after she was violently assaulted in central London. Darren Clayton took to Instagram to voice his anger over the attack, ...

Dakota Johnson stepped out for the first time since it was revealed her ex-boyfriend Chris Martin has moved on with Sophie Turner. The actress, 36, who split with Coldplay frontman Chris after eight ...

Abstract: A new, hot cathode, three electrode vacuum tube, the dynatron, is described. A constant, positive voltage is applied between the hot cathode and the perforated rugged anode. A supplementary ...

We are at a critical time and supporting climate journalism is more important than ever. Science News and our parent organization, the Society for Science, need your help to strengthen environmental ...