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W77

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ID = 19905
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to W77 = EF92 = 6CQ6 = 9D6 = CV131
Similar Tubes
Other class quality (otherwise equal):
  6CQ6S
Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 6.3 Volts / If 0.2 Ampere / Indirect / Specified voltage AND current AC/DC
mi16_g_5.gif W77: RTT Schwandt
Günther Stabe † 19.8.20

Just Qvigstad 		w77_1.png
W77: own collection
Peter den Boer
More ...
Usage in Models 3= 1949 ; 1= 1950?? ; 5= 1950 ; 2= 1951? ; 15= 1951 ; 3= 1952?? ; 6= 1952 ; 5= 1953? ; 3= 1953 ; 1= 1954?? ; 10= 1954? ; 7= 1954 ; 1= 1955?? ; 2= 1955? ; 1= 1956? ; 3= 1959?? ; 5= 1959? ; 1= 1960??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):74

Collection of

Collection of a member from FIN
Mario Coelho (P)
 
w77_brimar.jpg

W77
 
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