Antique radios, Old Time Radios

UX201A

Country:	United States of America (USA)	Brand:	Common type USA
		Developer:	GEC, General Electric Co.; London
		Tube type:	Triode, vacuum Universal

Tube ID = 3613


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Identical to	UX201A = CX301A = AX201A = D401A = UX-201-A = 201 = 201A = 235D = ER201A = SX201A = X201A = TC201A = AWA101X
Similar Tubes	Other shape (e.g. bulb type): 01A Normally replaceable-slightly different: AX Other base: 201A_Japan; AWA55
First Series	1925 Radios von gestern
Predecessor Tubes	UV201A
Successor Tubes	01A UX240 UX226 226

Base	UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Was used by	Radio/TV-reception etc.
Filament	Vf 5 Volts / If: 0.25 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). 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. Text in other languages (may differ)
Tube prices	1 Tube prices (visible for members only)
Literature	Taschenbuch zum Röhren-Codex 1948/49

KoBi
Konrad Birkner

Usage in Models (calculation each 25th of the month)	1= 1924? ; 5= 1924 ; 23= 1925 ; 1= 1926?? ; 16= 1926 ; 6= 1927 ; 1= 1928?? ; 8= 1928 ; 1= 1929?? ; 6= 1929 ; 1= 1930 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 69

No further Information for

UX201A

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