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ID = 4187
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer: National Union Radio Corp.; Orange (NJ) 
Tube type:  High-vacuum Rectifier   Power-supply 
Identical to 1Z2
First Source (s)
10.Aug.1945 : Electron Tube Registration List rec. 420

Base Miniatur-7-Pin-Base B7G, USA 1940 (Codex=Zd)
Filament Vf 1.5 Volts / If 0.3 Ampere / Direct
Description High-voltage rectifier. 20kV PIV, 7.8kV max rms, 2mA max DC. 
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature
1Z2: Eigene Sammlung
Aldo Patriarca

1Z2: ARRL Handbook 1972
Michael Schlör

1Z2: SEL Handbuch 1964
Peter Hoddow

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