Antique radios, Old Time Radios

81

ID = 2998

Country:

United States of America (USA)

Brand:	Common type USA tube/semicond. Common type USA tube/semicond. Arcturus Radio Tube Co.; Newark, NJ Cineco (Tube brand) General Electric Co. (GE); Bridgeport CT, Syracuse NY Hytron; Salem (MA) Lafayette Radio & TV Corp; New York (NY) Liberty, Falcon Tube Company; Chicago, IL National Union Radio Corp.; Orange (NJ) Norelco, North American Philips Co. Inc.; Dobbs Ferry and New York, NY Raytheon Mfg. Co.; Cambridge, MA RCA (RCA Victor Co. Inc.); New York (NY) Triad Television & Mfg. Co.; Pawtucket, RI Tung-Sol Electric Inc.; Newark (NJ)
Developer:	Westinghouse El. & Mfg. Co. - see also Canadian W.
Tube type:	Half-Wave Vacuum Rectifier Power-supply

Identical to

81 = UX281 = CV2546 = PH281 = C-281 = 181_Arcturus = 481 = CX381 = D1/2 = ER81 = PR281 = RE-2 = X281 = T-81 = G81 = NX-281 = RayX-281 = RYB281 = PA281 = MX281 = NU-81 = TC281 = TX181 = SLX281

Similar Tubes

Normally replaceable-slightly different:

38181 ; FX281 ; R81_USA ; V781 ; VX2810

First Source (s)

Dec.1927 : -- Collector info (Sammler)

Successor Tubes

SLX281

Base	UX-Base (4 Pins (2 thick, USA 1924, UX) (Codex=Bo)
Was used by	Radio/TV-reception etc.
Filament	Vf 7.5 Volts / If 1.25 Ampere / Direct / Specified voltage AC/DC
Dimensions (WHD) incl. pins / tip	x 158 x 54 mm / x 6.22 x 2.13 inch
Tube prices	2 Tube prices (visible for members only)
Information source	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	81: Internet Miguel Angel Trujillo-Rodriguez

81: RMG
Robert Gillespie
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81
Emilio Ciardiello
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81: Sylvania Technical Manual
Peter Hoddow
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from Just Qvigstad

Usage in Models

2= 1925 ; 1= 1926? ; 2= 1926 ; 13= 1927 ; 2= 1928?? ; 39= 1928 ; 1= 1929?? ; 10= 1929? ; 33= 1929 ; 9= 1930?? ; 3= 1930 ; 1= 1931?? ; 1= 1931 ; 2= 1932?? ; 10= 1932? ; 2= 1932 ; 6= 1933 ; 3= 1934 ; 1= 1935? ; 2= 1936? ; 1= 1938 ; 1= 1940

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):145

Collection of Karlheinz Fischer (D)

Collection of Giuseppe Antonio Tusini (I)

Collection of Fin Stewart (AUS)

Collection of Jose Luis Villabona Horreo (E)

Collection of Robert Gillespie (USA)

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

81

Common type USA tube/semicond.