radiomuseum.org
Please click your language flag. Bitte Sprachflagge klicken.

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 / Specified 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 30 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_sock.png EF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Just Qvigstad 		ef22_spez.png
EF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Usage in Models 4= 1941?? ; 29= 1941 ; 2= 1942?? ; 3= 1942? ; 36= 1942 ; 1= 1943? ; 42= 1943 ; 1= 1944?? ; 6= 1944? ; 51= 1944 ; 1= 1945?? ; 12= 1945? ; 21= 1945 ; 10= 1946?? ; 8= 1946? ; 44= 1946 ; 1= 1947?? ; 4= 1947? ; 51= 1947 ; 6= 1948?? ; 19= 1948? ; 67= 1948 ; 2= 1949?? ; 7= 1949? ; 42= 1949 ; 6= 1950?? ; 7= 1950? ; 31= 1950 ; 2= 1951?? ; 7= 1951? ; 18= 1951 ; 3= 1952?? ; 5= 1952? ; 9= 1952 ; 3= 1953? ; 4= 1953 ; 2= 1954? ; 4= 1954 ; 14= 1955?? ; 2= 1955? ; 14= 1955 ; 1= 1956?? ; 1= 1956? ; 9= 1956 ; 3= 1957?? ; 3= 1957? ; 5= 1957 ; 3= 1958?? ; 3= 1958 ; 3= 1960?? ; 1= 1960? ; 1= 1960 ; 1= 1961? ; 1= 1962 ; 1= 1965?? ; 1= 1970?? ; 1= 9999
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):639

Collection of

Thomas Loidl (A)
Christian Schaufelberger (CH)
David Pfister (CH)
Aldo Patriarca (CH)
Bruno Candreia (CH)
Jan Poortman (NL)
Jacky Parmentier (F)
Georges Werts (B)
Hannu Alho (FIN)
Collection of a member from FIN
Jouko Laukkanen (FIN)
Timo Rantasaari (FIN)
Walter Nigg (FL)
Sándor Selyem-Tóth (H)
Tor Steinnes (N)
Tomasz Szczesniak (PL)
Lars Nord (S)
Jacob Roschy (D)
Ulrich Fieseler (D)
Reinhard Riek (D)
Werner Wussow (D)
Hans-Werner Ellerbrock (D)
Ottmar Rollmann (D)
Rudolf Osterkamp (D)
Trev Levick (D)
Karl - Heinz Bossan (D)
Michael Niermann (D)
Andreas Reuther (D)
Peter Pfeiffer (D)
Otto Frosinn (D)
Heinz Schmidt (D)
Collection of a member from D
 
ef22_philips.jpg

EF22
 

Variants

EF22 in black aluminium can. MG = Metal - Glass.
Low profile military version.
EF22 in aluminium can (as EF50). MG = Metal - Glass.
Ab 1944 von Albis (CH) entwickelte Stahlröhre, deren Produktion 1945 wieder eingestellt wurde.
Von den Stahlausführungen der ECH21, EF22, EBL21 und AZ21 wurden insgesamt nur einige hundert Stück hergestellt.
Quelle: Willi, E., Schweizer Elektronenröhren, 2005
You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg