vacuum tube

The heart of your microwave is called a magnetron—a bulky component made of a vacuum tube and two magnets.

We covered the revolution in computing that has transformed science and society from the era of vacuum tubes.

It was only a matter, he said, of transferring a man's habit patterns from brain cells to vacuum-tube cells.

The luminous phenomena are very similar to those seen when a current of electricity is passed through a vacuum tube.

An interesting vacuum tube is made which has no electrodes, but contains a quantity of mercury.

These are met with in barometers, spray arresters, and filter pumps, in condensers and some forms of vacuum tube.

A form of vacuum tube which has proved very successful in the author's hands is sketched in Fig. 38.