On the theory of tubes with two control grids
Subtitle: their use as amplifier, modulators, and detectors
By: by Alexander H. Wing.
Publisher: George Banta publishing company]
Published: 1940
Place of publication: New York; [Menasha, Wis
Language: eng
Number of pages: 46
Subjects: Vacuum-tubes.
Notes: "List of numbered references": p. 44-45.
Thesis (Ph. D.)--Columbia university.
Vita.
"The specific data here presented concerns the pentagrid heptode, whose type designation is 6L7 for the metal envelope and 6L7G for the glass envelope."--Introd.