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ID = 7488
United States of America (USA)
Brand: United Electronics Corp.; Newark, NJ
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to 975A
Similar Tubes
Normally replaceable-slightly different:

Base Jumbo 4-pin bayonet (1918) (Codex=Bz) Top contact with a cap.
Was used by Industrial
Filament Vf 5 Volts / If 10 Ampere / Direct
Dimensions (WHD)
incl. pins / tip
x 250 x 90 mm / x 9.84 x 3.54 inch
Information source Tube Lore (II)   p. 162
Universal Vade-Mecum, Electron Valves and Semiconductor Devices   Section 67, p. 91
Taschenbuch zum Röhren-Codex 1948/49

975a_so.png 975A: ARRL Handbook 1972
Anonymous 10 Collector

Just Qvigstad
975A: United Electronics 1945
Günter Kudicke

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