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Description
From Gerald F. J. Tyne, with note on reverse: #6019. Advertisement copied from Nov. 1916 QST. "There is only one audion, the de Forest" ad for the De Forest Ultraudion Detector for damped and undamped waves, from the DeForest Radio Telephone & Telegraph Company, 101 Park Avenue, New York. Photos of the Type UJ1 DeForest Ultraudion Detector, and the Genuine DeForest Tubular Audion.
Type
image
Format
Black & White
Identifier
DB909C34-FDAF-47D1-B3E7-202794616642 2003-59-354
Subject
De Forest Radio Telephone & Telegraph Co Audion Radio--Receivers and reception (LCSH) Radio detectors (LCSH)
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