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ER81

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ID = 73748
       
Country:
United States of America (USA)
Brand: Eveready (Ever Ready), AENMC / National Carbon Company (NCC); Columbia
Developer: Westinghouse El. & Mfg. Co. - see also Canadian W. 
Tube type:  Half-Wave Vacuum Rectifier   Power-supply 
Identical to ER81 = ER281 = UX281 = CX381 = 481 = 81
Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.
Filament Vf 7.5 Volts / If 1.25 Ampere / Direct / Specified voltage AC/DC
Information source -- Collector info (Sammler)   
81~~3.png ER81: Fin Stewart
Fin Stewart

Just Qvigstad
 
er81_1_e116.jpg

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