THIS book was first published in 1937 under the title “The Low Voltage Cathode Ray Tube”, which was somewhat misleading in view of the fact that it deals with the various forms of cathode ray tube ...

Perhaps nothing added quite so much to the charm of vacuum tube circuits from back in the heyday of the vacuum tube as did the “Magic Eye” indicating tube. With the ghostly green glow of its circular ...

Dim lights in order to make the electron beam more visible. Wire up the heater and accelerator contacts (and also deflector contacts, if desired) on the tube to the power supply (or supplies). If ...