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ID = 14590
Brand: Radioröhrenfabrik GmbH (RRF) (CHF Müller // RRF // Valvo); Hamburg
Tube type:  Triode, vacuum 
Identical to OeconomW4

Filament Vf 3.8 Volts / If 0.05 Ampere
Description Die Röhre wird auch als Ökonom W4 bezeichnet. 
Information source Taschenbuch zum Röhren-Codex 1948/49   

OeconomW4: Funk-Bastler 1927, Heft 14
Hartmut Völler


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