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ID = 57577
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to BU30/12

Base Edison big E27 = 27 mm
Was used by Radio/TV-reception etc.
Filament Direct

Current .27 -.35 amps

Dimensions (WHD)
incl. pins / tip
x 100 x 32 mm / x 3.94 x 1.26 inch
Information source - - Manufacturers Literature   Data sheet December 1948

baretter_e27~~3.png BU30/12: Fin Stewart
Fin Stewart

Just Qvigstad
BU30/12: own collection
Peter den Boer


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