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EF93

Information - Help 
ID = 725
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to EF93 = 6BA6 = 6К4П = W727 = CV454 = PM04
Similar Tubes
Normally replaceable-slightly different:
  6K4_China
Other class quality (otherwise equal):
  5749 ; 6660 ; CK5749
Heater different:
  HF93
Other base:
  6DG7 ; EF89F
First year 1950 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Nov.1951 : Funkschau # 22

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Indirect /
Tube prices 6 Tube prices (visible for members only)

  ef93.png
  EF93: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
ef93_philips.jpg
EF93: My own collection
Hannu Alho

 
mi28.png
EF93: RTT 1974 (Franzis) 13. Auflage
Martin Renz

 
ef93_techdat01.png
EF93: RCA Tube Manual
Peter Hoddow


Usage in Models 2= 1950?? ; 1= 1951?? ; 1= 1951? ; 5= 1951 ; 1= 1952?? ; 5= 1952? ; 19= 1952 ; 6= 1953?? ; 12= 1953? ; 70= 1953 ; 11= 1954?? ; 6= 1954? ; 63= 1954 ; 11= 1955?? ; 8= 1955? ; 29= 1955 ; 4= 1956?? ; 6= 1956? ; 29= 1956 ; 2= 1957?? ; 8= 1957? ; 11= 1957 ; 4= 1958?? ; 1= 1958? ; 22= 1958 ; 2= 1959?? ; 6= 1959? ; 18= 1959 ; 12= 1960?? ; 3= 1960? ; 10= 1960 ; 2= 1961?? ; 2= 1961? ; 7= 1961 ; 1= 1962?? ; 1= 1962 ; 3= 1963? ; 4= 1963 ; 1= 1964?? ; 2= 1964? ; 9= 1964 ; 7= 1965?? ; 1= 1965? ; 3= 1966?? ; 2= 1966 ; 1= 1967 ; 1= 1968?? ; 1= 1970?? ; 1= 1973?? ; 1= 1973 ; 1= 9999?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):439


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