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EF9 Info
Country:  Netherlands      Brand:  Philips; - Eindhoven; Netherlands 
  Developer:  Philips; - Eindhoven; Netherlands 
  Tube type:  PENTODE   RF/IF-Stage   Controlling (mu) 
Tube ID = 275
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Identical to EF9
Similar Tubes EF22 (other base)   EF25 (can normally be replaced - small diff'ce)   UF5 (Heater different)   EF39 (other base)   EF9nT (Multiple differences or of other kind)   4659 (other class quality (otherw. equal))   WE16 (other characteristic (electr. data))  
First Series   Apr.1938 Tube leaflet collection E.Erb Analysis by original leaflets
Predecessor Tubes EF5  
Successor Tubes 1941 EF22   EF41   UF9   UF5   EF21_9pin  

Base Europe side contact base P (P8A) (Codex=Sf)
Was used by Radio/TV-reception etc.
Filament -: Indirect / -: Parallel / series AC/DC / If: 0.2 Ampere / Vf 6.3 Volts /
Description Red series 
Text in other languages (may differ)
Tube prices 0 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ef9.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
ef9_mzf_r.jpg
Collection JR
Jacob Roschy

 
au25_2.png
RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ef9_spez.gif
RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models   1= 1937?? ; 4= 1938?? ; 21= 1938? ; 255= 1938 ; 16= 1939?? ; 29= 1939? ; 231= 1939 ; 31= 1940?? ; 20= 1940? ; 136= 1940 ; 4= 1941?? ; 6= 1941? ; 134= 1941 ; 6= 1942?? ; 6= 1942? ; 78= 1942 ; 10= 1943?? ; 2= 1943? ; 47= 1943 ; 3= 1944?? ; 3= 1944? ; 18= 1944 ; 23= 1945?? ; 10= 1945? ; 47= 1945 ; 10= 1946?? ; 1= 1946? ; 33= 1946 ; 19= 1947?? ; 9= 1947? ; 44= 1947 ; 26= 1948?? ; 13= 1948? ; 73= 1948 ; 10= 1949?? ; 5= 1949? ;
Number of Models with this tube   1521
No further Information for

EF9    

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21AugX