Motor power and suction capacity are more important than just wattage. Look for models with strong airflow and advanced filtration. Wet and dry vacuums offer greater versatility, while bagless models ...

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 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 ...

Abstract: Vacuum tube amplifiers have been developed for use in submarine telegraph reception and at present are in successful operation on four high speed permalloy cables. There is no limit to the ...

Abstract: As a potential development direction of future transportation, the vacuum tube ultra-high-speed train (UHST) wireless communication systems have newly different channel characteristics from ...

Dyson vacuums are often said to be some of the best vacuums on the market, but most shoppers aren’t willing to spend a few hundred dollars on one item, that’s why Walmart is having a deal you ...

Fall cleaning might not get the same hype as spring cleaning, but it’s just as important, especially before major holidays roll in. Today is the last day to take advantage of significant October Prime ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more ...