Western Electric 3N22  
Written by Accutron on 2018-01-16  

The Western Electric 3N22 is an unusual germanium grown junction tetrode transistor with two leads connected to its base. This tetrode configuration was a solution to poor frequency response in grown junction transistors, by which higher frequencies could be obtained by biasing the second base electrode. Vestigial clipped fourth electrodes can also be found on various Western Electric triode transistors from the era, such as the GA-52609.

Western Electric 3N22 Datasheet (PDF)

Western Electric 3N22 germanium grown junction tetrode transistor.

3N22 tetrode transistor with original packaging. This device was manufactured in December 1956 and packaged in January 1957.

This article is part of the [Discrete Semiconductors] exhibit.

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