Image / de Forest early broadcast tube, type 500

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Title: de Forest early broadcast tube, type 500
Date Created and/or Issued: 1943/05/14
Contributing Institution: History San Jose Research Library
Collection: History San Jose Online Catalog
Rights Information: Please contact the contributing institution for more information regarding the copyright status of this object.
Description: From Gerald F. J. Tyne, with handwritten note: Type 500 - early broadcast tube, has two halves of filament in parallel. 14 May 1943.
Type: Image
Format: Black & White
Identifier: 50379753-4548-4B58-9996-397364747756
2003-59-320
Subject: Vacuum-tubes (LCSH)
Radio broadcasting--History (LCSH)
Audion
De Forest, Lee

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