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BU140/28

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ID = 57626
       
Country:
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to BU140/28

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament
Information source - - Manufacturers Literature   december 1948
Babani, International Radio Tube Encyclopaedia   P. 316


Just Qvigstad
bu100-14a_170-28data_5.png
BU140/28: own collection
Peter den Boer

 

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