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ID = 44892
Great Britain (UK)
Brand: Six Sixty (valves), The Electron Company Ltd.; London
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to SSIH60/250
Similar Tubes
Normally replaceable-slightly different:
  1881 ; IW2 ; R1 ; U10

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.3 Ampere / Half indirect

Va <250 rms per anode; Ia <60mA mean at 250V dc, Ia <30mA mean at 270V dc.

Information source Wireless World (The), London (WW, 79)   1933 data
History of the British Radio Valve to 1940   p. 151

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