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A425

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ID = 2453
       
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 A425 = RE034 = A22 = PM3DX
Similar Tubes
Normally replaceable-slightly different:
  1-425 ; 407W ; 410HF ; 410RC ; 4AAF1 ; 4AFF1 ; 4B3_Ultron ; AF_Castilla ; C25 ; D502 ; DT4_Triode ; G425_Longlife ; H4 ; L307 ; M350 ; OX254 ; V3030 ; W4 ; W412
Other base:
  A425_UX
First year 1926 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
1925 : Saga of the Vacuumtube, Tyne p.421

Base Europe 4-Pin (A, 4A, B4, since 1914) (Codex=Eo)
Filament Vf 4 Volts / If 0.06 Ampere / Direct / Battery =
Description Also available with UX4 base. 
Tube prices 1 Tube prices (visible for members only)
Literature Babani, International Radio Tube Encyclopaedia   
Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature
 
nl_philips_a425.jpg
A425: My collection.
Sandor Selyem-Tóth

 
1_10.png
A425: Telefunken Werkstattbuch
Wolfgang Bauer

 
a425_spec.png
A425: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 1= 1926? ; 8= 1926 ; 3= 1927?? ; 5= 1927? ; 23= 1927 ; 3= 1928?? ; 4= 1928? ; 27= 1928 ; 4= 1929?? ; 4= 1929? ; 27= 1929 ; 2= 1930?? ; 3= 1930? ; 24= 1930 ; 2= 1931? ; 7= 1931 ; 5= 1932

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):152


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