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ID = 3607
United States of America (USA)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Gas Triode   Detector 
  <1925 very rare. ***
Identical to UV200 = C300 = C-300 = 00_UV = U200 = 200_UV = 400_UV = 2961 = X200 = UV500
Similar Tubes
Normally replaceable-slightly different:
  B200 ; D200_Dutch ; DX200 ; M200
Heater different:
First year Nov.1920 Saga of the Vacuum Tube, Tyne page 308
Successor Tubes UX200  

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 at 5 volts. Both have pear-shaped bulbs and are tipped. The base has a mantle of brass with a ceramic insert in which the pins are imbedded. Cunningham is naming his as C-300 and C-301.

In 1925 (Stokes, page 17) 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 instead 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 The UX200A has a thoriated filament but is still outdated and was not being used for new models, only as replacement for the UX200 (EE).

The type number UV200 was registered by RCA as a radio trade mark with the US Government on 6th June 1922, being allocated no 155802.

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 107 x 45 mm / x 4.21 x 1.77 inch
Weight 49 g / 1.73 oz
Tube prices 30 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   p. 308 & 309, 311 & 312, 323
Tube Lore (II)   p. 25

uvsockel_2.png UV200: KoBi
Konrad Birkner † 12.08.2014

Just Qvigstad
UV200: KoBi
Konrad Birkner † 12.08.2014

Usage in Models 16= 1920 ; 1= 1921? ; 115= 1921 ; 3= 1922?? ; 31= 1922? ; 346= 1922 ; 1= 1923?? ; 15= 1923? ; 92= 1923 ; 1= 1924?? ; 8= 1924? ; 42= 1924 ; 17= 1925 ; 4= 1926 ; 1= 9999

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):693

Collection of




This one has also a brass base, but no tip.

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