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F443

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ID = 2895
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   Power/Output 
Identical to F443 = L495D
Similar Tubes
Normally replaceable-slightly different:
  4650 ; 822 ; F443N ; L497D ; P460_Triotron ; PM24D
Other base:
  F443_UY
First year 1933 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Jul.1930 : -- Original-techn. papers.
Oct.1932 : Philips Bulletin #D3
Successor Tubes 1933   4650   F443N  

Base Europe 5-Pin (O5A, B5) (Codex=Foo)
Filament Vf 4 Volts / If 2 Ampere / Direct / Parallel, (AC/DC)
Description The F443 is the first series produced 25 watts output-pentode, thus it is the ancester 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)
Literature Taschenbuch zum Röhren-Codex 1948/49   
 
f443_pic3.jpg
F443: Courtesy of Richard Olsen
Anonymous 15 Collector

 
4_11.png
F443: Telefunken Werkstattbuch
Wolfgang Bauer

 
daten_f443_philips.png
F443: Philips Verstärkerröhren
Gerhard Heigl


Usage in Models 1= 1931 ; 3= 1932

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


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