A glass-bulb electron tube was used, similar to that held by Moseley in the photo at the top of this article.
These types may still be referred to as "electron tubes" as they do perform electronic functions.
His first job was providing mathematical analysis for the design of electron tubes used in radar.
Like so many devices, it had its own special electron tubes.
Three got through to destroy both the hippos of the first attacking wave and one of the electron tubes.
An engineer draws a random sample of electron tubes and measures their voltage.
The Computron was an electron tube designed to perform the parallel addition and multiplication of digital numbers.
It is used in lasers and electron tubes.
What else was there for him to use before the development of the photo tube and the current-amplifying electron tube?