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EF22 Country:  Netherlands      Brand:  Philips; - Eindhoven; Netherlands    Developer:  Philips; - Eindhoven; Netherlands    Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu)  Tube ID = 1870 previous  |  next Identical to EF22 = W143 = CV303 = 6H2 = 6F22_Sweden Similar Tubes Other base:  EF21_9pin; EF41; EF9 First Series   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        Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus

M.N. Anonymous 124 Collector   Variants RVF-Röhrenbuch-M1,1947 Anonymous 15 Collector   RVF-Röhrenbuch-M1,1947 Anonymous 15 Collector

Usage in Models (calculation each 25th of the month)   1= 1940 ; 27= 1941 ; 1= 1942?? ; 3= 1942? ; 34= 1942 ; 40= 1943 ; 5= 1944? ; 53= 1944 ; 10= 1945? ; 19= 1945 ; 5= 1946?? ; 3= 1946? ; 41= 1946 ; 1= 1947?? ; 1= 1947? ; 41= 1947 ; 3= 1948?? ; 6= 1948? ; 54= 1948 ; 1= 1949?? ; 3= 1949? ; 36= 1949 ; 4= 1950?? ; 2= 1950? ; 25= 1950 ; 1= 1951?? ; 4= 1951? ; 13= 1951 ; 2= 1952?? ; 2= 1952? ; 7= 1952 ; 4= 1953 ; 1= 1954? ; 3= 1954 ; 3= 1955?? ; 2= 1955? ; Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):   489

Variants
	EF22*Low profile Low profile military version. 14.May.2006 Gabriel Toth
	EF22*Metall Röhre durch ein Aluminiumgehäuse geschützt. 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

No further Information for EF22

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