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57T245

Información - Ayuda 
ID = 68300
       
País:
Estados Unidos
Marca: WLS (tubes), World's Largest Store - see also Sears, Roebuck & Co; Chicago, IL
Diseñador: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tipo:  Triode, vacuum   Power/Output 
  Ca. 1925 up to 1945 rare.
Idéntica a 57T245 = UX245 = CX345 = 145

Base UX-Base (4 Pins (2 thick, USA 1924)
Usada en Radio/TV-reception etc.
Filamento Vf 2.5 Volt / If 1.5 Ampere / Direct / Specified voltage AC/DC
Descripción

Pages 762 and 763 of the Fall 1929 Sears Roebuck catalog lists Silvertone tubes for the first time, with a totally new catalog number, for example 57T245 = UX245. Research has not yet provided a manufacturer or location of a factory and Tyne's "Saga of the Vacuum Tube", page 362, states: "No information available" for Silvertone. It is presumed that these tubes were made by the Sonatron Tube Company, with an address in Chicago and also in New York and it is also known that Sonatron acquired three smaller companies in 1929 before they themselves were acquired by National Union in September 1929 (Tyne page 359). Silvertone tubes continued to be available for some years and tube boxes with both Sears Roebuck and Silvertone printed on them are relatively common in the US. Sears Roebuck Archives state that the company "ended its association" with Silvertone (radios and or tubes is uncetain) in 1972.

 
Dimensiones
(Alt,Ancho,Prof.)
incl.pins/tip
x 137 x 54 mm / x 5.39 x 2.13 inch
Peso 65 g / 2.29 oz
Literatura Sears, Roebuck Catalogs (Silvertone)   Fall issue pages 762 and 763
Saga of the Vacuum Tube, Tyne   Pages 359 and 362

uxsockel_11~~29.png 57T245: Fin Stewart
Fin Stewart


Just Qvigstad
 

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