Vacuum tubes ruled electronics for several decades and while you might think of them as simple devices analogous to a transistor or FET, there were many special types. We’re all familiar with nixie ...

If Nixies aren’t cool enough, maybe it’s time to step it up to magic eye tubes. Magic eye tubes are, like Nixies and Dekatrons, display tubes. Unlike the alphanumeric characters of Nixies or rotating ...

A plastic 6-pin base with domed envelope. Donor’s card reads: “Electron-ray tube, glass type, made by the Radio Corporation of America in the early 1930s. An early model of the “magic eye” tuning ...

A plastic 6-pin base with domed envelope. Base stamped: "RCA Cunningham / Made in U.S.A. / Radiotron / [RCA logo]"; on envelope: "6E5". Donor’s card reads: “Electron-ray tube, glass type, made by the ...