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ID = 28720
Brand: La Radiotechnique (RT); Paris, Suresnes
Tube type:  Transmitting Triode, air cooled 
Identical to R_Radiotech
First year 1921 ?? Saga of the Vacuumtube, Tyne page 398, 405

Filament Direct

Hersteller: La Radiotechnique, fertigte haupsächlich Senderöhren - ab 1927 Dario


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