Possibly not made by Marconi but imported under the Marconi label to Sweden
Tapped filament permits operation at 2.8V 0.05A.
Text in other
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Literature
-- Collector info (Sammler)
- - Manufacturers Literature
- - -
- - -
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 5
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