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ID = 51403
Brand: Megatron Radio; Hilversum (NL)
Tube type:  Vacuum Pentode 
  Ca. 1925 up to 1945 rare.
Identical to M447
Similar Tubes
Other characteristic (electr. data):
Production stop Jan.1937

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Top contact screw type.
Filament Vf 4 Volts / If 1 Ampere / Indirect
Information source - - Manufacturers Literature   1934
M447: Telefunken Werkstattbuch
Wolfgang Bauer


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