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 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 / Parallel, (AC/DC defined voltage)
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

81
Emilio Ciardiello

81: Sylvania Technical Manual
Peter Hoddow

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)

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81

Common type USA tube/semicond.