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45

Country:  United States of America (USA)      Brand:  Common type USA tube 
  Developer:  Westinghouse El. & Mfg. Co. - see also Canadian W. 
  Tube type:  Triode, vacuum   Power/Output 
Tube ID = 3112
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Identical to 45 = 245 = CX345 = 45_Arcturus = 145 = 45A = A245 = ER45 = EX645 = UX245 = PH245
Similar Tubes Normally replaceable-slightly different:
 38045; FX245; VT-45
Other class quality (otherwise equal):
 CV610
First year   1929 Radios von gestern
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)
Filament Vf 2.5 Volts / If: 1.5 Ampere / -: Direct / -: Parallel, (AC/DC) /
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, carbonzed fo facilitate radiation. Power output about 0.8 watt. 
Tube prices 2 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   

  45.png
  45: Courtesy Bureau Belper (De Muiderkring, Bussum)
Michael Schlör
45_02r.jpg
45
Jacob Roschy
 
171_15.png
45: Telefunken Werkstattbuch
Wolfgang Bauer
 
45_techdat01.png
45: Sylvania Technical Manual
Peter Hoddow
Usage in Models   7= 1928 ; 6= 1929?? ; 9= 1929? ; 168= 1929 ; 25= 1930?? ; 39= 1930? ; 250= 1930 ; 21= 1931?? ; 49= 1931? ; 230= 1931 ; 11= 1932?? ; 50= 1932? ; 67= 1932 ; 5= 1933?? ; 13= 1933? ; 49= 1933 ; 8= 1934?? ; 8= 1934? ; 35= 1934 ; 10= 1935?? ; 4= 1935? ; 63= 1935 ; 12= 1936?? ; 2= 1936? ; 24= 1936 ; 1= 1937?? ; 1= 1937? ; 18= 1937 ; 6= 1938?? ; 2= 1938? ; 3= 1938 ; 3= 1939 ; 1= 1940?? ; 4= 1940 ; 2= 1941?? ; 2= 1941 ; 2= 1942??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   1210
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