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1N77B

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ID = 35766
       
Country:
United States of America (USA)
Brand: Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Tube type:  Solid-State-Diode 
Identical to 1N77B

Description Photodiode, .077" dia.. -50V max operating voltage, -45V typical. Designed for punched card or perforated tape readers. 
Information source - - Manufacturers Literature   
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