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EF22

Information - Help 
ID = 1870
       
Country:
Netherlands
Brand:
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
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   EF22_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 / Defined Voltage AND Current AC/DC
Description

The Philips 21- "Key Base" tubes were initially designed in 1940 with the 9-pin base B9G like the EF50. The later series production from 1942 on however was changed to the 8-pin Locktal-base B8G designed by Sylvania.

 
Tube prices 29 Tube prices (visible for members only)
Information source - - Manufacturers Literature   1940
Philips Bulletin   Juli 1941
Taschenbuch zum Röhren-Codex 1948/49
  ef22.png
  EF22: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
ef22_philips.jpg
EF22: My tubes
Anonymous 413 Collector
 
ef22_sock.png
EF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
 
ef22_spez.png
EF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

from Just Qvigstad
Usage in Models 4= 1941?? ; 29= 1941 ; 1= 1942?? ; 3= 1942? ; 36= 1942 ; 1= 1943? ; 42= 1943 ; 1= 1944?? ; 6= 1944? ; 51= 1944 ; 11= 1945? ; 21= 1945 ; 9= 1946?? ; 7= 1946? ; 45= 1946 ; 1= 1947?? ; 4= 1947? ; 50= 1947 ; 6= 1948?? ; 17= 1948? ; 68= 1948 ; 2= 1949?? ; 7= 1949? ; 42= 1949 ; 6= 1950?? ; 7= 1950? ; 31= 1950 ; 2= 1951?? ; 4= 1951? ; 17= 1951 ; 2= 1952?? ; 3= 1952? ; 9= 1952 ; 3= 1953 ; 2= 1954? ; 4= 1954 ; 13= 1955?? ; 2= 1955? ; 12= 1955 ; 1= 1956?? ; 1= 1956? ; 7= 1956 ; 3= 1957?? ; 3= 1957? ; 5= 1957 ; 3= 1958?? ; 3= 1958 ; 3= 1960?? ; 1= 1960? ; 1= 1960 ; 1= 1962 ; 1= 1965?? ; 1= 1970?? ; 1= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):616
Collection of Jacob Roschy (D)
Collection of Michael Niermann (D)
Collection of Andreas Reuther (D)
Collection of Christian Schaufelberger (CH)
Collection of Trev Levick (D)
Collection of Rudolf Osterkamp (D)
Collection of Otto Frosinn (D)
Collection of Karl - Heinz Bossan (D)
Collection of Jan Poortman (NL)
Collection of Heinz Schmidt (D)
Collection of Hans-Werner Ellerbrock (D)
Collection of Ulrich Fieseler (D)
Collection of David Pfister (CH)
Collection of Aldo Patriarca (CH)
Collection of Ottmar Rollmann (D)
Collection of Thomas Loidl (A)
Collection of Georges Werts (B)
Collection of Werner Wussow (D)
Collection of a member from FIN
Collection of Sandor Selyem-Tóth (H)
Collection of Jacky Parmentier (F)
Collection of Tomasz Szczesniak (PL)
Collection of Jouko Laukkanen (FIN)
Collection of Hannu Alho (FIN)
Collection of Timo Rantasaari (FIN)
Collection of Walter Nigg (FL)
Collection of Reinhard Riek (D)
Collection of a member from D
Collection of Tor Steinnes (N)
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