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ID = 28997
Brand: Lutèce-Lumière S.A.; Paris
Tube type:  Full-Wave Vacuum Rectifier   Power-supply 
Identical to B507
First year 1928 Saga of the Vacuum Tube, Tyne page 413

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.2 Ampere / Direct / Parallel, (AC/DC)
Description Manufacturers : Lutèce-Lumiere SA, Paris
Heizung 4 bis 4,5V 0,2A
Rectifier 2x200V 30mA
Text in other languages (may differ)
Information source Saga of the Vacuum Tube, Tyne   page 413
- - Manufacturers Literature   Catalog 1929
B507: Ebay
Patrice Zeissloff

B507: Manufacturers data
Patrice Zeissloff

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