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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 P8A (Au P, 8SC) (Codex=Sf) Top contact with a cap.
Filament Vf 6.3 Volts / If 0.4 Ampere / Indirect / Specified voltage AC/DC
Description Erste Autoradio-Serie in Europa. Philips ab 1934 genannt (März, Philips Bulletin). 
Tube prices 1 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
ef1.gif
EF1: ficha de valvulas
Getulio Jimenez-Gomez
28_8~~1.png EF1: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad 		ef1_data1.png
EF1: Telefunken 1935
Robert Schmalstieg
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Usage in Models 5= 1934 ; 5= 1935 ; 2= 1936? ; 6= 1936 ; 2= 1938 ; 1= 1946 ; 1= 1947 ; 1= 1948
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):23
Literature "Funk" Vol. 12 No. 8 | 1935-04

Collection of

Christian Schaufelberger (CH)
Tomasz Szczesniak (PL)
Klaus Rüdiger (D)
Jacob Roschy (D)
Peter Pfeiffer (D)
Museum RFT-Verein SFT (D)
Thomas Lebeth (A)
Stefan Müller (D)
Wolfgang Bauer (A)
 
ef1_684.jpg

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