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ID = 57607
Great Britain (UK)
Brand: Ediswan, Siemens Edison Swan Electric Co.; London
Tube type:  Current Regulator, Iron in Hydrogen   Power-supply 
Identical to BU80/21

Base Edison big E27 = 27 mm
Was used by Radio/TV-reception etc.
Filament Vf 12 Volts / If 0.72 Ampere / Direct
Dimensions (WHD)
incl. pins / tip
x x 38 mm / x x 1.50 inch
Information source - - Manufacturers Literature   December 1948 & June 1951

baretter_pins_e27_e40~~4.png BU80/21: Fin Stewart
Fin Stewart

Just Qvigstad
BU80/21: own collection
Peter den Boer


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