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ID = 67938
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:  Triode, vacuum   Audio Frequency 
  <1925 very rare. ***
Identical to CG-1787

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Military and/or Government
Filament Vf 3.65 Volts / If 0.65 Ampere / Direct / Battery =

This tube was a special receiving type designed for the U.S.Navy late in 1924 and the following is stamped on the base: "Licensed only for Governmental and not Commercial uses nor for toll and not for resale". This wording is also on the patents list on the box. Also stamped on the base is: "US Navy Dept. Type CG-1787 GE Co". The tubes were made at both the Nela park factory in Ohio (with phosphorus getters) and the Harrison factory in New Jersey (with magnesium getters).

Dimensions (WHD)
incl. pins / tip
x x 45 mm / x x 1.77 inch
Information source - - Manufacturers Literature   
Tube Lore (II)   p. 182
-- Collector info (Sammler)

uv~~76.png CG-1787: Fin Stewart
Fin Stewart

Just Qvigstad

Collection of



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