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EF93 Info
Country:  Europe      Brand:  Common tube type Europe 
  Tube type:  PENTODE   RF/IF-Tube   Controlling (mu) 
Tube ID = 725
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Identical to EF93 = 6BA6 = 6k4p = W727 = CV454
Similar Tubes 6660 (can normally be replaced - small diff'ce)   5749 (other class quality (otherw. equal))   HF93 (Heater different)   CK5749 (can normally be replaced - small diff'ce)   6DG7 (other base)  
First Series   1950 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s) Nov.1951 : Funkschau (FS) # 22

Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament -: Indirect /
Tube prices 0 Tube prices (visible for members only)

  ef93.gif
  Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus
d_valvo_ef93.jpg
TreLe
Trev Levick

 
mi28.png
RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ef93_techdat01.png
RCA Tube Manual
Peter Hoddow

Usage in Models   2= 1950?? ; 6= 1951 ; 2= 1952? ; 18= 1952 ; 3= 1953?? ; 3= 1953? ; 66= 1953 ; 3= 1954?? ; 4= 1954? ; 43= 1954 ; 1= 1955?? ; 16= 1955 ; 1= 1956?? ; 3= 1956? ; 17= 1956 ; 3= 1957? ; 7= 1957 ; 3= 1958?? ; 12= 1958 ; 3= 1959? ; 5= 1959 ; 2= 1960?? ; 2= 1960 ; 1= 1961?? ; 1= 1961? ; 2= 1961 ; 3= 1963? ; 2= 1964 ; 5= 1965?? ; 1= 1968?? ; 1= 1970?? ; 1= 1973 ; 1= 9999 ;
Number of Models with this tube   243
No further Information for

EF93    

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16DecX