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45

Information - Help 
ID = 3112
       
Country:
United States of America (USA)
Brand:
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Triode, vacuum   Power/Output 
Identical to 45 = 145 = A245 = ER45 = EX645 = UX245 = PH245 = 445 = SX245 = MX245 = 245/C = L45 = ER245 = DX245 = PA245 = AC45 = TX-45 = VX245 = X245 = T-45 = P245 = G-45 = Z-45 = AX-245 = CL-45 = RayX-245 = RYB245 = NU-45 = C-245 = R45_Rogers = NX-245 = TS245 = TX245 = 245 = CX345
Similar Tubes
Other shape (e.g. bulb type):
  102A_Boonton ; M45 ; PM245
Normally replaceable-slightly different:
  38045 ; CA245 ; FX245 ; U245 ; VT-45
Other class quality (otherwise equal):
  536A_Boonton ; CV610
Heater different:
  UY-45H
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 / Specified voltage 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."

 
Dimensions (WHD)
incl. pins / tip		 x 108 x 45 mm / x 4.25 x 1.77 inch
Weight 47 g / 1.66 oz
Tube prices 10 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Tube Lore (II)   p. 27
45.png
45: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector
171_15.png 45: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		45_techdat01.png
45: Sylvania Technical Manual
Peter Hoddow
More ...
Usage in Models 6= 1929?? ; 14= 1929? ; 165= 1929 ; 30= 1930?? ; 46= 1930? ; 286= 1930 ; 20= 1931?? ; 55= 1931? ; 221= 1931 ; 11= 1932?? ; 46= 1932? ; 71= 1932 ; 5= 1933?? ; 14= 1933? ; 54= 1933 ; 7= 1934?? ; 12= 1934? ; 44= 1934 ; 7= 1935?? ; 11= 1935? ; 74= 1935 ; 13= 1936?? ; 8= 1936? ; 25= 1936 ; 1= 1937?? ; 1= 1937? ; 22= 1937 ; 6= 1938?? ; 3= 1938? ; 3= 1938 ; 1= 1939?? ; 1= 1939? ; 3= 1939 ; 1= 1940?? ; 4= 1940 ; 6= 1941?? ; 3= 1941 ; 2= 1942?? ; 1= 1947 ; 1= 9999? ; 4= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1308

Collection of

Robert Gillespie (USA)
David Erali (USA)
George Papaiz (CDN)
Bruce Morgenstern (CDN)
Collection of a member from CH
Christian Schaufelberger (CH)
Geri Meier (CH)
Peter Kovacs (CH)
Aldo Patriarca (CH)
John Hupse † 28.9.20 (NL)
Collection of a member from I
Benedetto Pirani (I)
Georges Werts (B)
Frank Desoppere (B)
Danko Tkalec (HR)
Sinisa Trlin (HR)
Aires Gomes (P)
Heriberto Tavella (RA)
Jacob Roschy (D)
Sigurd Hauschild (D)
Siegfried WALTHER (D)
Karlheinz Fischer (D)
Nigel Hulse (ZA)
 
45_02r.jpg

45
 

Variants

Ausführung mit blauem Glas.
Metal coated cylindrical glass version. Complete name: M45. The letter "M" appears only on the boxes and enclosed paperwork, not on the tubes. Please klick here: M45
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