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Visitron21

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ID = 46423
       
Country:
United States of America (USA)
Brand: Visitron / Neotron (tubes), G-M Scientific Instrument Co. / Laboratories, Inc.; Urbana and Chicago, IL
Tube type:  Photocell   Indication 
Identical to Visitron21

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Technology / Measurement
Filament --/--
Description

Made by G-M Scientific Instruments Co. for early TV- experiments.

 
Text in other languages (may differ)
Information source -- Collector info (Sammler)   Harry Alter's Radio Book 1927


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