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DF25

Information - Help 
ID = 426
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to DF25
Similar Tubes
Other base and data slightly different:
  DF25_Miniloktal
First year 1941 -- Collector info (Sammler)
Predecessor Tubes DF21  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Woq)
Filament Vf 1.2 Volts / If 0.025 Ampere / Direct / Battery =
Tube prices 3 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  df25.png
  DF25: Internet
Miguel Angel Trujillo-Rodriguez
 
df25_014r.jpg
DF25: Collection JR
Jacob Roschy

 
111.png
DF25: Telefunken Werkstattbuch
Wolfgang Bauer

 
df25_spec.png
DF25: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector


Usage in Models 1= 1941?? ; 1= 1941? ; 1= 1942? ; 1= 1942 ; 2= 1944? ; 3= 1944 ; 2= 1948 ; 1= 1952

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):12


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