Farad unbased triode #58 B

Mid-1920s.
Farad Corp., 239 Centre Street, New York, N.Y.
Very little is known about this manufacturer.
Listed in the McGraw-Hill Radio Trade Catalog of 1926 as a manufacturer of rectifiers and other vacuum tubes.

Note the twin indirectly-heated cathodes.

 

Hauteur • Height • Höhe : 113 mm • 4" 4/10
Diamètre • Diameter • Durchmesser : 44 mm • 1" 7/10

Paper label on another Farad tube

 

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