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ID = 3608
United States of America (USA)
Developer: General Electric Co. (GE); Bridgeport CT, Syracuse NY 
Tube type:  Triode, vacuum   Universal 
  <1925 rare.
Identical to UV201 = C301 = 01 = RE58
Similar Tubes
Other characteristic (electr. data):
Heater different:
  201 ; DC201A_UV ; UV201A
Heater and shape different:
First year Dec.1920 Saga of the Vacuum Tube, Tyne page 308 below
Production stop Oct.1922
Successor Tubes 1923   UV201A  

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.

In 1922 GE replaces the UV201 with the UV201A, having now a thorium filament.

In 1925 this tube comes with a new base and standardised construction (of 1923) for neutrodyne apparatus and is then called UX201A. Cunningham is naming the tube CX301A.

By having the tube with a shoulder type glass envelope (dome type) in 1932 the designation is changed to 01A. The 01A marks the end of this line of tubes.

The type no UV201 was registered by RCA as a radio trade mark with the US Government on 6th June 1922, being allocated no 155803.

The UV201 from Westinghouse (as a back-up) is different!

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
x 106 x 45 mm / x 4.17 x 1.77 inch
Tube prices 10 Tube prices (visible for members only)
Information source Saga of the Vacuum Tube, Tyne   Pages 308-314, 322
Tube Lore (II)   p. 25

uvsockel_4.png UV201: KoBi
Konrad Birkner † 12.08.2014

Just Qvigstad
Usage in Models 1= 1920? ; 13= 1920 ; 3= 1921? ; 89= 1921 ; 2= 1922?? ; 30= 1922? ; 285= 1922 ; 2= 1923?? ; 4= 1923? ; 28= 1923 ; 1= 1924?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):458

Collection of



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