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ID = 21609
Great Britain (UK)
Brand: GEC, General Electric Co.; London
Tube type:  Triode, vacuum   Universal 
Identical to L77 = EC90 = CV133
Similar Tubes
Normally replaceable-slightly different:
Other class quality (otherwise equal):

Base Miniatur-7-Pin-Base B7G, USA 1940
Filament Vf 6.3 Volts / If 0.15 Ampere / Indirect / Parallel / series AC/DC

Comprises a single triode as used in the B327/12AU7

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
19 x 55 x mm / 0.75 x 2.17 x inch
Information source Röhren-Taschen-Tabelle, (Franzis RTT)   
L77: S.A.C.
Stig Comstedt

L77: RTT Schwandt
Günther Stabe † 19.8.20

L77: Marconi DataSheet
Franz Scharner

from Just Qvigstad

Usage in Models 1= 1950? ; 1= 1950 ; 1= 1954? ; 2= 1955? ; 1= 1957 ; 1= 1960??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):7

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