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 ...

If you live in a small apartment or home, then you know how valuable closet space is. That’s especially true for city dwellers, like myself, where it’s extremely scarce. It’s why having hacks that ...

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 ...

When it comes to vintage displays, everyone gravitates to Nixies. These tubes look great, but you’re dealing with a certain aesthetic with these vintage numeric tubes. There is another option. For his ...

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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: 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 ...

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 ...

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