Audion

an early type of triode.
Historical Examples

Let us arrange an audion in a circuit which will tell us a little more of what happens.
Letters of a Radio-Engineer to His Son John Mills

I want a couple of audion bulbs, and I suppose you fellows do, too.
The Radio Boys at the Sending Station Allen Chapman

But it will take another letter to tell you of the proper precautions in using an audion as an amplifier.
Letters of a Radio-Engineer to His Son John Mills

In an audion besides the filament there are two other things.
Letters of a Radio-Engineer to His Son John Mills

The slightest change in electric power in the grid will produce large changes of power in the current flowing through the audion.
Inventions of the Great War A. Russell (Alexander Russell) Bond

It will be most convenient, however, to represent an audion as in Fig. 5.
Letters of a Radio-Engineer to His Son John Mills

These Vesta batteries are the “A” batteries used for heating the filaments of the audion bulbs.
The Automobile Storage Battery O. A. Witte

We were at the point of zero volts on the audion characteristic of Fig. 35.
Letters of a Radio-Engineer to His Son John Mills

If you understand how the audion works as a detector you will have no difficulty in understanding the crystal detector.
Letters of a Radio-Engineer to His Son John Mills

You will notice how I have drawn them beside and below the audion characteristic.
Letters of a Radio-Engineer to His Son John Mills