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ID = 25481
United States of America (USA)
Brand: RCA (RCA Victor Co. Inc.); New York (NY)
Developer: RCA (RCA Victor Co. Inc.); New York (NY) 
Tube type:  Double Triode 
Identical to 1679
Similar Tubes
Other class quality (otherwise equal):
First Source (s)
1949 : Tube Lore (I)
Production stop 1952
Successor Tubes 1684   5844  

Filament Vf 6.3 Volts / If 0.6 Ampere / Indirect / Specified voltage AC/DC
Description Min. Duotriode, 6J6 selected for improved cutoff and high zero-bias plate current, sold only to IBM for computer use. Tubes failing the selection became regular 6J6. Intro. 1949; superseded 1952 by type 1684. Bulbs were to be etched "6J6," not "1679" and branded with "IBM" and their part nos. 6J3000 and 300703. [Information by L. Sibley] 

564~~3.png 1679: Telefunken Werkstattbuch
Wolfgang Bauer


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