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EF22

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 = 1870
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Identical to EF22 = W143 = CV303 = 6H2 = 6F22_Sweden
Similar Tubes Other base:
 EF21_9pin; EF41; EF9
First year   Feb.1941 Tube leaflet collection E.Erb Philips Book III [178]
First Source (s) Feb.1941 : Daten und Schaltungen moderner ... Röhren; Philips # 3
Jul.1941 : Radio-Mentor # 7
Predecessor Tubes EF9   EF21_9pin  
Successor Tubes 1947 EF41  
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Waa)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If: 0.2 Ampere / -: Indirect / -: Parallel / series AC/DC /
Tube prices 2 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ef22.gif
  EF22: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
ef22_philips.jpg
EF22: My tubes
Anonymous 413 Collector
 
Variants
 
ef22_sock.png
EF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
 
ef22_spez.gif
EF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
Usage in Models   1= 1940 ; 1= 1941?? ; 26= 1941 ; 1= 1942?? ; 3= 1942? ; 36= 1942 ; 41= 1943 ; 5= 1944? ; 51= 1944 ; 10= 1945? ; 21= 1945 ; 11= 1946?? ; 4= 1946? ; 41= 1946 ; 1= 1947?? ; 2= 1947? ; 46= 1947 ; 4= 1948?? ; 11= 1948? ; 61= 1948 ; 1= 1949?? ; 4= 1949? ; 39= 1949 ; 4= 1950?? ; 3= 1950? ; 27= 1950 ; 1= 1951?? ; 4= 1951? ; 15= 1951 ; 2= 1952?? ; 2= 1952? ; 9= 1952 ; 3= 1953 ; 2= 1954? ; 5= 1954 ; 6= 1955?? ; 2= 1955? ; 11= 1955 ; 1= 1956? ; 5= 1956 ; 3= 1957?? ; 2= 1957? ; 5= 1957 ; 3= 1958?? ; 2= 1958 ; 1= 1960?? ; 1= 1960 ; 1= 1962 ; 1= 1965?? ; 1= 1970?? ; 2= 9999
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   545

  Variants

EF22*Low profile

Low profile military version.

14.May.2006 Gabriel Toth

  
EF22*MG

EF22 in aluminium can (as EF50). MG = Metal - Glass.

05.Aug.2009 Otto Frosinn
eigene Sammlung
David Pfister
EF22*Stahl

Ab 1944 von Albis (CH) entwickelte Stahlröhre, deren Produktion 1945 wieder eingestellt wurde .
Von den Stahlausführungen der ECH21, EF22, EBL21 und AZ21 wurden insegesamt nur einige hundert Stück hergestellt.
Quelle: Willi, E., Schweizer Elektronenröhren, 2005

07.Oct.2009

   
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