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ID = 17903
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: National Union Radio Corp.; Orange (NJ) 
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to 1B1
First Source (s)
22.May.1935 : Electron Tube Registration List

Base UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=B)
Was used by Radio/TV-reception etc.

360 mA load current, 1.8 to 2.2 V load voltage, 2.2 to 3.2 battery voltage. ST-12 envelope.

Tube prices 3 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

577_1.png 1B1: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
1B1: Sylvania Technical manual
Anonymous 413 Collector

Usage in Models 1= 1936? ; 6= 1936 ; 1= 1937? ; 3= 1937 ; 6= 1938?? ; 1= 1938? ; 2= 1938 ; 1= 1940?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):21

Collection of



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