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EF40

Information - Help 
ID = 370
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  Vacuum Pentode   Audio Frequency 
Identical to EF40
First year 1948 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Mar.1948 : Funkschau # 3
Aug.1950 : Funk-Technik (FT) # 15
Predecessor Tubes EF12   EF6   EF6bi  
Successor Tubes EF86  

Base Rimlock base B8A
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Parallel, (AC/DC) /
Dimensions (WHD)
incl. pins / tip
22 x 60 x 22 mm / 0.87 x 2.36 x 0.87 inch
Tube prices 6 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   

  ef40.png
  EF40: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
ef40_pope.jpg
EF40: My tubes
Anonymous 413 Collector

 
ri14.png
EF40: RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ef40_kennli.png
EF40: Audio-u.Hifi-Röhren R.zur Linde
Günther Stabe


Usage in Models 4= 1948?? ; 4= 1948? ; 4= 1948 ; 4= 1949?? ; 6= 1949? ; 11= 1949 ; 11= 1950?? ; 10= 1950? ; 31= 1950 ; 1= 1951?? ; 12= 1951? ; 54= 1951 ; 2= 1952?? ; 14= 1952? ; 68= 1952 ; 8= 1953?? ; 14= 1953? ; 68= 1953 ; 5= 1954?? ; 7= 1954? ; 62= 1954 ; 19= 1955?? ; 6= 1955? ; 25= 1955 ; 9= 1956?? ; 6= 1956? ; 12= 1956 ; 3= 1957?? ; 9= 1957? ; 7= 1957 ; 3= 1958?? ; 2= 1958? ; 6= 1958 ; 9= 1959 ; 9= 1960?? ; 1= 1960? ; 1= 1960 ; 1= 1961?? ; 1= 1961 ; 1= 1962? ; 1= 1964?? ; 1= 1964 ; 1= 1967??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):533



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