Radiofrequency power is supplied to the dee by a vacuum-tube oscillator.
He guessed that they were housings for vacuum-tube elevator shafts that led to underground caves.
This glow is conceived to represent the Aurora, which may consequently be likened to a gigantic exhibition of vacuum-tube lights.
It was only a matter, he said, of transferring a man's habit patterns from brain cells to vacuum-tube cells.
|vacuum tube |
An electron tube from which all air has been removed. The vacuum ensures transparency inside the tube for electric fields and moving electrons. Most electron tubes are vacuum tubes; cathode-ray tubes, which include television picture tubes and other video display tubes, are the most widely used vacuum tubes. In other electronic applications, vacuum tubes have largely been replaced by transistors.