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1B4

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ID = 3905
       
Country:
United States of America (USA)
Brand:
Developer: National Union Radio Corp.; Orange (NJ) 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to 1B4 = 1B4E
First Source (s)
28.Aug.1935 : Electron Tube Registration List
Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bu) Top contact with a cap.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.06 Ampere / Direct / Battery =
Tube prices 1 Tube prices (visible for members only)
Information source - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
440_1.png 1B4: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		1b4_spec.png
1B4: Grundig Rö-Tabu, zum M1, Band 3, 1948
Anonymous 15 Collector
More ...
Usage in Models 1= 1935 ; 1= 1936? ; 10= 1936 ; 3= 1937?? ; 2= 1937 ; 1= 1938?? ; 1= 1938? ; 12= 1938 ; 2= 1939?? ; 1= 1939 ; 2= 1940?? ; 1= 1941?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):37

Collection of

David Erali (USA)
Bruce Morgenstern (CDN)
Tomasz Szczesniak (PL)
 
f_1b4.jpg

1B4
 
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