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ID = 19763
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 = 200_UV = 400_UV = X200 = 00_UV = U200 = 2961 = UV500 = UV200 = C-300
Similar Tubes
Normally replaceable-slightly different:
  B200 ; DX200 ; M200
First Source (s)
1920 : Saga of the Vacuum Tube, Tyne

Base UV-Base (4 Pins+Bayonet, USA 1914 WE)
Was used by Radio/TV-reception etc.
Filament Vf 5 Volts / If 1 Ampere / Direct / Battery =

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 2 Tube prices (visible for members only)
Information source - - Manufacturers Literature   1922
Tube Lore (II)   p. 31

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

Just Qvigstad
C300: own collection
Peter den Boer

More ...
Usage in Models 15= 1921 ; 4= 1923 ; 1= 1924?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):20

Collection of

Collection of a member from D


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