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E428

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ID = 1696
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Triode, vacuum   Universal 
  Ca. 1925 up to 1945 rare.
Identical to E428 = REN904 = AG495 = A4110 = E424N = A430N
Similar Tubes
Other shape (e.g. bulb type):
  I1304 ; T5-428
Normally replaceable-slightly different:
  5-428 ; M428 ; W308 ; W428
Other base:
  E428_4pin
First year 1929 Tube leaflet collection E.Erb Analysis by original leaflets
Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=F)
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Information source - - Manufacturers Literature   
Taschenbuch zum Röhren-Codex 1948/49   
  e428.gif
  E428: ficha de valvulas
Getulio Jimenez-Gomez
 
e428.png
E428: R.O.
Rudolf Osterkamp
More ...
 
7_18.png
E428: Telefunken Werkstattbuch
Wolfgang Bauer
 
e428_spec.png
E428: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...

from Just Qvigstad
Usage in Models 2= 1929 ; 6= 1930 ; 13= 1931 ; 3= 1932? ; 20= 1932 ; 2= 1933? ; 12= 1933 ; 3= 1934
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):61
Collection of Rudolf Osterkamp (D)
Collection of Otto Frosinn (D)
Collection of Heinz Schmidt (D)
Collection of John Koster (NL)
Collection of Jürgen Bauch (D)
Collection of Georges Werts (B)
Collection of Marco Lagendijk (NL)
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