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EF9

Country:  Netherlands      Brand:  Philips; Eindhoven (tubes international!); Netherlands 
  Developer:  Philips; Eindhoven (tubes international!); Netherlands 
  Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Tube ID = 275
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Identical to EF9 = CV1427 = TEF9
Similar Tubes Other class quality (otherwise equal):
 4659
Other characteristic (electr. data):
 EF9N; WE16
Heater different:
 UF5
Other base:
 EF22; EF39
Multiple differences or of other kind:
 EF9nT
First year   Apr.1938 Tube leaflet collection E.Erb Analysis by original leaflets
Predecessor Tubes EF5  
Successor Tubes 1941 EF22   EF41   UF9   UF5   EF21_9pin   EF39  
Base Europe side contact base P (P8A) (Codex=Sf)
Filament Vf 6.3 Volts / If: 0.2 Ampere / -: Indirect / -: Parallel / series AC/DC /
Description Red series 
Text in other languages (may differ)
Tube prices 1 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ef9.gif
  EF9: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
ef9_073r.jpg
EF9
Jacob Roschy
 
Variants
 
au25_3.png
EF9: RTT 1974 (Franzis) 13. Auflage
Martin Renz
 
ef9_spez.gif
EF9: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
Usage in Models   1= 1937? ; 5= 1938?? ; 26= 1938? ; 298= 1938 ; 33= 1939?? ; 37= 1939? ; 317= 1939 ; 36= 1940?? ; 28= 1940? ; 174= 1940 ; 5= 1941?? ; 9= 1941? ; 155= 1941 ; 4= 1942?? ; 7= 1942? ; 87= 1942 ; 10= 1943?? ; 3= 1943? ; 49= 1943 ; 2= 1944?? ; 6= 1944? ; 21= 1944 ; 24= 1945?? ; 15= 1945? ; 51= 1945 ; 20= 1946?? ; 7= 1946? ; 53= 1946 ; 21= 1947?? ; 13= 1947? ; 67= 1947 ; 45= 1948?? ; 14= 1948? ; 80= 1948 ; 17= 1949?? ; 12= 1949? ; 91= 1949 ; 27= 1950?? ; 9= 1950? ; 39= 1950 ; 8= 1951?? ; 1= 1951? ; 17= 1951 ; 4= 1952?? ; 1= 1952? ; 2= 1952 ; 1= 1953?? ; 1= 1954? ; 1= 1955?? ; 1= 1955 ; 1= 1956? ; 1= 1957?? ; 1= 1957? ; 1= 1960?? ; 2= 9999?
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   1961

  Variants


Own collection
Eduard Abfalterer
EF9*tubular

EF9 with tubular (straight) bulb

07.Feb.2012 Jacob Roschy

  
EF9*gold

EF9 with gold-colored bulb, although the EF9 belongs to the red series.

09.Feb.2012 Jacob Roschy
Collezione personale
Massimo Pedrina


Jean-Jacques Pontigny
EF9*green

EF9 with green-colored bulb, although the EF9 belongs to the red series

09.Feb.2012 Jacob Roschy
EF9*gray

EF9 with gray-colored bulb, although the EF9 belongs to the red series.

09.Feb.2012 Jacob Roschy
HS
Heinz Schmidt
   
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