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ID = 16707
United States of America (USA)
Brand: General Electric Co. (GE); Bridgeport CT, Syracuse NY
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Thyratron   Power-supply 
Identical to FG33 = GL5720 = 5720

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Top contact with a cap.
Was used by Industrial
Filament Vf 5 Volts / If 4.5 Ampere / Direct
Description Anode voltage 1000, grid voltage +10. This tube is a mercury vapour thyratron with a positive control characteristic. This offers the advantage of a tube which will only operate with a positive voltage on the grid. It is ideally suited for applications which require that no current flow in the absence of grid excitation. Also produced in Italy by Fivre. The tube is listed on page 48 of the "Story of Electronic Development at the General Electric company". Dated Dec 10th, 1930. 
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Data sheet ETI-120 dated April 1945

Just Qvigstad
FG33: Manufacturer's Literature
Emilio Ciardiello


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