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ID = 1706
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   Power/Output 
Identical to E443N = 252 = TE43N = L491D = PP4100
Similar Tubes
Normally replaceable-slightly different:
  Dn1004 ; G100 ; TP4100
Other characteristic (electr. data):
  E443 ; E443H
Heater different:
Other base:
First year 1930 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Jul.1930 : -- Original-techn. papers.
Predecessor Tubes E443   E443_4pin  
Successor Tubes E443H  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Filament Vf 4 Volts / If 1 Ampere / Direct / Specified voltage AC/DC
Description With 5.5 watts the output power of the E443(N) was increased to almost twice of the C443. To do so, it required 400 volts as anode and 200 volts as screen voltage 
Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   

E443N: ficha de valvulas
Getulio Jimenez-Gomez

4_10.png E443N: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad
E443N: Philips Verstärkerröhren
Gerhard Heigl

More ...
Usage in Models 4= 1930 ; 1= 1931?? ; 3= 1931 ; 13= 1932 ; 2= 1933?? ; 1= 1933 ; 3= 1934 ; 1= 1935? ; 1= 1936?? ; 2= 1939

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):31

Collection of



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