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MDM21

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ID = 30399
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Mag. Eye, 2 shadow angles   Indication 
Identical to MDM21 = DM21

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 1.4 Volts / If 0.025 Ampere / Direct / Battery =
Information source Taschenbuch zum Röhren-Codex 1948/49   
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108_1.png MDM21: Telefunken Werkstattbuch
Wolfgang Bauer


Just Qvigstad

Collection of

 
mdm21_r.jpg

 

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