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Description
de Forest holding early receiver at nationwide amateur radio show. (This appears to be the de Forest RJ4 Detector, also part of the Perham Collection of Early Electronics).
Type
image
Identifier
1A59599B-D833-45D8-8A6E-630463803289 2003-59-74
Subject
Audion Amplifiers (Electronics) (LCSH) Vacuum-tubes (LCSH) De Forest, Lee
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