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ID = 74727
United States of America (USA)
Brand: Eureka Tube and Manufacturing (T. & M.) Co.; Newark, NJ
Tube type:  Full-Wave Rectifier gas filled   Power-supply 
Identical to rectifier_kelvin = BH

Base UX-Base (4 Pins (2 thick, USA 1924, UX)
Was used by Radio/TV-reception etc.

125 mA rectifier designed for use in battery eliminators. Also available with 85 mA rating

Dimensions (WHD)
incl. pins / tip
x 108 x 45 mm / x 4.25 x 1.77 inch
Information source Radio Engineering   July 1927 and December 1927
Radio News   October 1927, p. 366

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