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45

Information - Help 
ID = 3112
       
Country:
United States of America (USA)
Brand:
Developer: Common type USA tube/semicond. 
Tube type:  Triode, vacuum   Power/Output 
Identical to 45 = 245 = CX345 = 145 = A245 = ER45 = EX645 = UX245 = PH245 = C-245 = 445 = SX245 = MX245 = 245-C = L45 = ER245 = DX245 = PA245 = AC45 = NX245 = X245 = T45 = G45 = NU-45
Similar Tubes
Other shape (e.g. bulb type):
  M45
Normally replaceable-slightly different:
  38045 ; FX245 ; VT-45
Other class quality (otherwise equal):
  536A_Boonton ; CV610
First year Mar.1929 Saga of the Vacuumtube, 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) /
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 7 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 6= 1929?? ; 17= 1929? ; 158= 1929 ; 25= 1930?? ; 43= 1930? ; 272= 1930 ; 20= 1931?? ; 49= 1931? ; 218= 1931 ; 11= 1932?? ; 45= 1932? ; 71= 1932 ; 5= 1933?? ; 13= 1933? ; 53= 1933 ; 8= 1934?? ; 8= 1934? ; 42= 1934 ; 7= 1935?? ; 7= 1935? ; 72= 1935 ; 13= 1936?? ; 5= 1936? ; 25= 1936 ; 1= 1937?? ; 1= 1937? ; 22= 1937 ; 6= 1938?? ; 3= 1938? ; 2= 1938 ; 1= 1939? ; 3= 1939 ; 1= 1940?? ; 4= 1940 ; 2= 1941?? ; 3= 1941 ; 2= 1942?? ; 1= 9999? ; 3= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1248
Collection of Peter Kovacs (CH)
Collection of Sinisa Trlin (HR)
Collection of John Hupse (NL)
Collection of Karlheinz Fischer (D)
Collection of David Erali (USA)
Collection of Danko Tkalec (HR)
Collection of Christian Schaufelberger (CH)
Collection of Nigel Hulse (ZA)
Collection of Aires Gomes (P)
Collection of Aldo Patriarca (CH)
Collection of George Papaiz (CDN)
Collection of Bruce Morgenstern (CDN)
Collection of Jacob Roschy (D)
Collection of Geri Meier (CH)
Collection of Heriberto Tavella (RA)
Collection of Siegfried WALTHER (D)
Collection of Sigurd Hauschild (D)
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