Antique radios, Old Time Radios

45

ID = 3112

Country:

United States of America (USA)

Brand:	Common type USA tube/semicond. Common type USA tube/semicond. Genalex, BGE (brand), British General Electric Co. Pty Ltd.; Sydney, NSW. Osram (tubes/valves) - see British General Electrics; Sydney Philips Australia Don Shinkukan Seisakusho - Don Vacuum Valve Mfg.; Tokyo Airex Radio Tubes Co.; New York Dynamic Radio Tube Works; Newark, NJ General Electric Co. (GE); Bridgeport CT, Syracuse NY Macy's, R.H. Macy & Co.; New York, NY Sylvania (Hygrade, GTE, Nilco); Emporium (PA) Triad Television & Mfg. Co.; Pawtucket, RI Tung-Sol Electric Inc.; Newark (NJ)
Developer:	Westinghouse El. & Mfg. Co. - see also Canadian W.
Tube type:	Triode, vacuum Power/Output

Identical to

45 = 245 = CX345 = 145 = A245 = ER45 = EX645 = UX245 = PH245 = 445 = SX245 = MX245 = 245-C = L45 = ER245 = DX245 = PA245 = AC45 = TX-45 = VX245 = X245 = T-45 = P245 = G45 = Z-45 = AX-245 = CL-45 = RayX-245 = RYB245 = NU-45 = C-245 = R45_Rogers = NX-245

Similar Tubes

Other shape (e.g. bulb type):

M45 ; PM245

Normally replaceable-slightly different:

38045 ; FX245 ; VT-45

Other class quality (otherwise equal):

536A_Boonton ; CV610

First year

Mar.1929 Saga of the Vacuum Tube, Tyne page 322.

First Source (s)

Jun.1929 : -- Collector info (Sammler)

Predecessor Tubes

71A

Successor Tubes

2A3 45spec VT-52

Base	UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by	Radio/TV-reception etc.
Filament	Vf 2.5 Volts / If 1.5 Ampere / Direct / Parallel, (AC/DC defined voltage)
Description	According to Tyne, page 322, this audio-power output tube was introduced in March 1929. It is intermediate between UX171A and UX210 and was first named UX245, later in short 245 and 45. See other identical denominations too. The oxide-coated filament operates at 2.5 volts AC or DC, taking 1.4 amperes. The anode is of sheet nickel, carbonized to facilitate radiation. Power output about 0.8 watt. "Development was started by Westinghouse in June 1928."
Tube prices	8 Tube prices (visible for members only)
Information source	Essential Characteristics, GE 1973


	45: Courtesy Bureau Belper (De Muiderkring, Bussum) Michael Schlör

45
Jacob Roschy

45: Telefunken Werkstattbuch
Wolfgang Bauer

45: Sylvania Technical Manual
Peter Hoddow

from Just Qvigstad

Usage in Models

6= 1929?? ; 17= 1929? ; 160= 1929 ; 28= 1930?? ; 44= 1930? ; 285= 1930 ; 20= 1931?? ; 52= 1931? ; 218= 1931 ; 11= 1932?? ; 45= 1932? ; 71= 1932 ; 6= 1933?? ; 14= 1933? ; 52= 1933 ; 8= 1934?? ; 10= 1934? ; 42= 1934 ; 7= 1935?? ; 11= 1935? ; 73= 1935 ; 13= 1936?? ; 5= 1936? ; 25= 1936 ; 1= 1937?? ; 1= 1937? ; 22= 1937 ; 6= 1938?? ; 3= 1938? ; 2= 1938 ; 1= 1939?? ; 1= 1939? ; 3= 1939 ; 1= 1940?? ; 4= 1940 ; 2= 1941?? ; 3= 1941 ; 2= 1942?? ; 1= 1947 ; 1= 9999? ; 3= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1280

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45

Common type USA tube/semicond.