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F443N

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ID = 2896
       
Country:
Netherlands
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):
  4650
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 (O5A, B5) (Codex=Foo)
Filament Vf 4 Volts / If 2 Ampere / Direct / Parallel, (AC/DC)
Description 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 2 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  f443n.gif
  F443N: ficha de valvulas
Getulio Jimenez-Gomez
 
roehre_f443n_bild_1.jpg
F443N: Eigenes Bild
Anonymous 971 Collector

 
4_12.png
F443N: Telefunken Werkstattbuch
Wolfgang Bauer

 
f443n_techdat01.png
F443N: Philips Röhren Daten 1933
Peter Hoddow


Usage in Models 1= 1933 ; 1= 1934? ; 1= 1934 ; 5= 1935? ; 1= 1935 ; 1= 1936? ; 2= 1936 ; 1= 1937?? ; 1= 1938 ; 1= 1939 ; 1= 1940

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

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

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