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3N21

Information - Help 
ID = 45135
       
Country:
United States of America (USA)
Brand: Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Tube type:  Transistor   Universal 
Identical to 3N21

Base Wires
Filament Solid State
Description Early PNP point-contact germanium high frequency tetrode transistor.
Announced in Electronics, August 1953 page 5, as useful in certain computer circuits. First deliveries were planned to start in the same month. Also advertised as current production device in Electronics, December 1953, page 7. 
Text in other languages (may differ)
Weight 1 g / 0.04 oz
Information source -- Original prospect or advert   Electronics, Aug. 1953, Dec. 1953
 

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