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C300

Information - Help 
ID = 19763
       
Country:
United States of America (USA)
Brand: Cunningham Inc., E.T.; Harrison (NJ)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Gas Triode   Detector 
Identical to C300 = UV200 = C-300 = 200_UV = 400_UV = 2961 = UV500
First Source (s)
1920 : Saga of the Vacuumtube, Tyne

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Filament Vf 5 Volts / If 1 Ampere / Direct / Battery =
Description

Tyne page 308ff brings the details of history. Here the main points only:
The first tubes RCA is marketing in 1920 are the detector tube UV200 with argon gas filling and the UV201 Amplifier. Manufacturer was General Electric (GE). Both tubes are operated with a filament current of 1 ampere and at 5 volts. Both have pear-shaped bulbs and are tipped. The base has a mantle of brass with a ceramic insert in thich the pins are imedded. Cunningham is naming his as C-300 and C-301.

Later RCA replaces the UV200 with the UX200.

In May 1926 RCA announces the UX200A as a new detector tube, replacing the UX200. The UX200A contains caesium vapor isntead of argon gas of the UV200 and UX200 to get a much more stable operation and increase of sensitivity. The UX200A has a thoriated filament (EE).

 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Literature - - Manufacturers Literature   1922
 
usa_cunningham_c300_ge_1.jpg
C300: J.Z.
Anonymous 56 Collector

 
uv~~102.png
C300: Fin Stewart
Fin Stewart

 
c300data1small.png
C300: own collection
Peter den Boer


Usage in Models 14= 1921 ; 4= 1923 ; 1= 1924?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):19

Collection of a member from D

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