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EF1

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ID = 525
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   Universal 
Identical to EF1 = TEF1 = VF1 = VEF1
Similar Tubes
Heater different:
  CF1
First year Mar.1934 Tube leaflet collection E.Erb Analysis by original leaflets (Bulletin D13)
First Source (s)
Mar.1934 : Philips Bulletin #D13
Successor Tubes EF7  

Base Europe side contact base P (P8A) (Codex=Sf) Top contact with a cap
Filament Vf 6.3 Volts / If 0.4 Ampere / Indirect / Parallel, (AC/DC)
Description Erste Autoradio-Serie in Europa. Philips ab 1934 genannt (März, Philips Bulletin). 
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  ef1.gif
  EF1: ficha de valvulas
Getulio Jimenez-Gomez
 
ef1_684.jpg
EF1: Collection JR
Jacob Roschy

 
28_8~~1.png
EF1: Telefunken Werkstattbuch
Wolfgang Bauer

 
ef1_data1.png
EF1: Telefunken 1935
Robert Schmalstieg


Usage in Models 3= 1934 ; 5= 1935 ; 2= 1936? ; 6= 1936 ; 1= 1937 ; 1= 1946 ; 1= 1947 ; 1= 1948

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):20



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