Antique radios, Old Time Radios

EF93

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: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus †

EF93: My own collection
Hannu Alho

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

EF93: RCA Tube Manual
Peter Hoddow

from Just Qvigstad

Usage in Models

1= 1950?? ; 1= 1951?? ; 5= 1951 ; 1= 1952?? ; 7= 1952? ; 19= 1952 ; 6= 1953?? ; 13= 1953? ; 69= 1953 ; 11= 1954?? ; 9= 1954? ; 63= 1954 ; 11= 1955?? ; 11= 1955? ; 31= 1955 ; 5= 1956?? ; 5= 1956? ; 30= 1956 ; 3= 1957?? ; 9= 1957? ; 13= 1957 ; 4= 1958?? ; 2= 1958? ; 23= 1958 ; 2= 1959?? ; 6= 1959? ; 21= 1959 ; 12= 1960?? ; 2= 1960? ; 11= 1960 ; 2= 1961?? ; 2= 1961? ; 7= 1961 ; 2= 1962?? ; 5= 1962? ; 2= 1962 ; 2= 1963? ; 5= 1963 ; 1= 1964?? ; 2= 1964? ; 9= 1964 ; 7= 1965?? ; 1= 1965? ; 3= 1966?? ; 3= 1966 ; 1= 1967 ; 1= 1968?? ; 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):466

Collection of Jacob Roschy (D)

Collection of Christian Schaufelberger (CH)

Collection of Bernhard Nagel (D)

Collection of Trev Levick (D)

Collection of Patrice Zeissloff (F)

Collection of Simon Reiger (D)

Collection of Jan Peter Brömme (D)

Collection of Karlheinz Fischer (D)

Collection of Karl - Heinz Bossan (D)

Collection of Heinz Schmidt (D)

Collection of Ulrich Fieseler (D)

Collection of Ottmar Rollmann (D)

Collection of Götz Linss (D)

Collection of Georges Werts (B)

Collection of Danko Tkalec (HR)

Collection of Werner Wussow (D)

Collection of a member from FIN

Collection of Hermann Fleischanderl (A)

Collection of Hannu Alho (FIN)

Collection of Bekir Yurdakul (F)

Collection of Stig Comstedt (S)

Collection of Timo Rantasaari (FIN)

Collection of Oskar Elm (D)

Collection of a member from D

Collection of Jose Luis Villabona Horreo (E)

Collection of Tor Steinnes (N)

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