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ID = 2896
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   Power/Output 
Identical to F443N = L497D
Similar Tubes
Normally replaceable-slightly different:
  F443 ; P460_Triotron ; TM-3G-BF25
Other class quality (otherwise equal):
First year 1933 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Oct.1933 : -- Original prospect or advert
Predecessor Tubes F443  
Successor Tubes 1947   EL60   EL34   AL5   EL5  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 2 Ampere / Direct / Specified voltage AC/DC

F443 is the first series produced 25 watts output-pentode, thus it is the ancestress of the later EL34. At 550 Vp and 250 Vg2 the F443N is capable of 41 watts output power in push-pull [Jacob Roschÿ, 2003-03-17]

Text in other languages (may differ)
Tube prices 3 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   

F443N: ficha de valvulas
Getulio Jimenez-Gomez

4_12.png F443N: Telefunken Werkstattbuch
Wolfgang Bauer

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Just Qvigstad
F443N: Philips Röhren Daten 1933
Peter Hoddow

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Usage in Models 1= 1933 ; 1= 1934? ; 1= 1934 ; 3= 1935? ; 1= 1935 ; 3= 1936? ; 2= 1936 ; 1= 1937?? ; 1= 1938 ; 1= 1939 ; 1= 1940

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):16

Collection of

Collection of a member from D
Collection of a member from FIN



F443N with balloon shaped bulb

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