His most recent pain has been with the rectifier tube. The tube is supposed to have a complete vacuum inside ... The tube starts out with the same violet/blue glowing [Eric] experienced previously.

If you want to build your own vacuum tubes, whether amplifying ... the static electricity generated by sliding mercury down glass tubes for days on end.) The pump itself is very simple.

located under the sliding glass door on the top panel, Equinox users can swap in different 12AU7 tubes per their preference. A step-up model called the Fezz Audio Equinox Prestige ($3,995) includes ...

For instance, in the render shown above, a vacuum tube amplifies signals by exchanging kinetic energy in an electron beam (the blue line) with electromagnetic energy (the orange wave). Concepts ...

RASCOE: So tell us about these little glass tubes, which older people know from radios and televisions. I know about them, too. I'm not that old. BALL: (Laughter) Well, I do know that the vacuum ...

with vacuum tubes. We have sealed up English and German glass tubes with very high vacuums, but without any electrodes; and have obtained very remarkable luminous effects both with the Ruhmkorf ...

A bank of blinking lights indicate the mysterious processes going on within: That classic symbol of a computer has lasted long after computers evolved into friendly desktop tools. This was not a ...

IN my letter published in the last number of NATURE I omitted to say that we have compared vacuum tubes without electrodes ... A great tendency to rupture of the glass was also observed.