radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

CG1787

Information - Help 
ID = 67938
       
Country:
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 CG1787

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 =
Description

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 CG1787 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).

 
Information source - - Manufacturers Literature   
-- Collector info (Sammler)   
 
20190902_162820.jpg
CG1787: RMG
Robert Gillespie

More ...
 
uv~~76.png
CG1787: Fin Stewart
Fin Stewart

 

from Just Qvigstad


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg