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ID = 7004
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Half-Wave Mercury-Vapor Rectifier   Power-supply 
Identical to ESU300
Similar Tubes
Normally replaceable-slightly different:

Base Edison giant, E40 = 40 mm-Goliat (Codex=Edison 27 mm) Top contact screw type.
Filament Vf 4 Volts / If 16 Ampere / Direct / Specified voltage AC/DC
Description <7kV rms <3.5A pk. Hard Glass envelope. 
Dimensions (WHD)
incl. pins / tip
65 x 250 x mm / 2.56 x 9.84 x inch
Information source Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   

edison_rect_13.png ESU300: Manufacturer's Literature
Emilio Ciardiello

Just Qvigstad
ESU300: own collection
Peter den Boer

Collection of

Collection of a member from D


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