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EF91

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ID = 18603
       
Country:
Europe
Brand: Common type Europe tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to EF91 = Z77 = 6F12 = 8D3 = 6AM6 = N79 = CV138 = 5A/160H = M2462-406
Similar Tubes
Normally replaceable-slightly different:
  5A/160K ; 6024 ; 6064 ; 7498 ; CV1955 ; E1518
Other class quality (otherwise equal):
  6AM6S ; CV4014 ; M8083 ; PM07 ; QA2403 ; R144 ; S6F12
Other base:
  5A/159G ; CV2031 ; EF91G
Other base and data slightly different:
  CV2000 ; CV4002
Base Miniatur-7-Pin-Base B7G, USA 1940
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Tube prices 6 Tube prices (visible for members only)
Information source -- Collector info (Sammler)   
Babani, International Radio Tube Encyclopaedia   p. 104 & 105
Universal Vade-Mecum, Electron Valves and Semiconductor Devices
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
ef91.gif
EF91: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
mi16.png EF91: RTT 1964 (Franzis) 10. Auflage
Martin Renz

Just Qvigstad 		ef91_mullard_data_01.png
EF91: Mullard - original papers
Wolfgang Romeyke
More ...
Usage in Models 6= 1949 ; 1= 1950?? ; 1= 1950? ; 8= 1950 ; 2= 1951 ; 2= 1952 ; 1= 1953?? ; 1= 1953? ; 2= 1954?? ; 2= 1954? ; 2= 1954 ; 6= 1955?? ; 1= 1955? ; 1= 1955 ; 4= 1956?? ; 1= 1956 ; 2= 1957? ; 1= 1957 ; 1= 1958?? ; 2= 1959? ; 4= 1960?? ; 1= 1960? ; 1= 1962?? ; 1= 1962? ; 1= 1963? ; 1= 1963 ; 1= 1964? ; 4= 1965?? ; 1= 1966?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):62

Collection of

Trev Levick (D)
Karlheinz Fischer (D)
Tor Steinnes (N)
Karl - Heinz Bossan (D)
Hartmut Völler (D)
Timo Rantasaari (FIN)
Ottmar Rollmann (D)
Jacob Roschy (D)
Georges Werts (B)
Stig Comstedt (S)
Dennis Jaroschek (D)
Justo Puertas-Paule (E)
Danko Tkalec (HR)
George Papaiz (CDN)
Hannu Alho (FIN)
Collection of a member from D
Patrice Zeissloff (F)
Collection of a member from E
Ulrich Fieseler (D)
Oskar Elm (D)
Peter Pfeiffer (D)
Hermann Fleischanderl (A)
Tomasz Szczesniak (PL)
Martin Steyer (D)
Christian Schaufelberger (CH)
Kazimierz Jarosz (S)
Collection of a member from FIN
 
ef91_siemens~~1.jpg

EF91
 
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