With the development of multigrid tubes in the 1920s, the generic term audion fell into disuse and was replaced by more descriptive terminology. |
The output of this audion was a radio-frequency current modulated by the voice. |
That is what the audion does in the transmitting set of a radio telephone. |
You will notice how I have drawn them beside and below the audion characteristic. |
In an audion besides the filament there are two other things. |
You might ask, when you buy an audion, what is a safe rating for it. |