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A440N

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ID = 3919
       
Country:
Austria
Brand: Triotron (tubes) = Brand of Schrack, Austria
Developer: Triotron (tubes) = Brand of Schrack, Austria 
Tube type:  Triode, vacuum   Audio Frequency 
  Ca. 1925 up to 1945 rare.
Identical to A440N
Similar Tubes
Normally replaceable-slightly different:
  AR4120 ; E499 ; REN914 ; W4110

Base Europe 5-Pin (O5A, B5) (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Parallel, (AC/DC)
Literature - - Manufacturers Literature   1935
Taschenbuch zum Röhren-Codex 1948/49   
 
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A440N: Telefunken Werkstattbuch
Wolfgang Bauer

 
a440ndata.png
A440N: own collection
Peter den Boer


Usage in Models 1= 1932 ; 2= 1933 ; 1= 1934

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):4

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