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A441N

Information - Help 
ID = 2456
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Space Charge Tetrode 
Identical to A441N = AB4
Similar Tubes
Normally replaceable-slightly different:
  4B7_Ultron ; RO4141 ; RO4181
Other characteristic (electr. data):
  4DR ; A441 ; DG407 ; DM300_old ; KL70410 ; RE074d ; U409D
Other base:
  A441N_5pin
Other base and data slightly different:
  R43M
Other base and other heater:
  RRCF
Multiple differences or of other kind:
  CI ; T.M.B.G.

Base Europe 4-Pin B4 + side contact (Codex=Eu)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.08 Ampere / Direct / Battery =
Description

Vom Hersteller als "Doppelgitterröhre" bezeichnet. Bekannt ist sie in der Raumladegitterschaltung in vielen Bastelanleitungen geworden. -- Wurde in den 20ern auch für selbstschwingende Mischschaltungen (Modulateur Bigrille) verwendet.

 
Information source Taschenbuch zum Röhren-Codex 1948/49   
 
a441n~~1.png
A441N: R.O.
Rudolf Osterkamp

 
2.png
A441N: Telefunken Werkstattbuch
Wolfgang Bauer

 
a441n_spec.png
A441N: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


from Just Qvigstad

Usage in Models 1= 1926?? ; 1= 1927?? ; 1= 1927? ; 4= 1928?? ; 2= 1928? ; 1= 1928 ; 1= 1929?? ; 1= 1929? ; 7= 1929 ; 4= 1930?? ; 1= 1930? ; 10= 1930 ; 3= 1931 ; 1= 1935 ; 1= 1942?? ; 1= 1944 ; 2= 1948

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):42


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