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EF1 Info
Country:  Netherlands      Brand:  Philips; - Eindhoven; Netherlands 
  Developer:  Philips; - Eindhoven; Netherlands 
  Tube type:  PENTODE   Universal 
Tube ID = 525
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Identical to EF1 = TEF1
Similar Tubes CF1 (Heater different)  
First Series   Mar.1934 Tube leaflet collection E.Erb Analysis by original leaflets (Bulletin D13)
First Source (s) Mar.1934 : Philips Bulletin
Successor Tubes EF7  

Base Europe side contact base P (P8A) (Codex=Sf) Top contact with a cap
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel, (AC/DC) / If: 0.4 Ampere / Vf 6.3 Volts /
Description Erste Autoradio-Serie in Europa. Philips ab 1934 genannt (März, Philips Bulletin). 
Text in other languages (may differ)
Tube prices 0 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ef1.gif
  ficha de valvulas
Getulio Jimenez-Gomez
ef1_3.jpg
JR
Jacob Roschy

 
au53.gif
RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ef1_tech.png
Valvo Röhrendatenblatt
Martin Steyer

Usage in Models   2= 1934 ; 5= 1935 ; 6= 1936 ; 1= 1937 ; 1= 1946 ; 1= 1947 ; 1= 1948 ;
Number of Models with this tube   17
No further Information for

EF1    

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