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ID = 37770
Brand: SER, AB Svenska Elektronrör (before Svenska Radio AB); Stockholm
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to RTR4142

Base Octal (Int.Octal, IO) K8A, USA 1935 Top contact with a cap.
Filament Vf 5.25 Volts / If 0.38 Ampere / Indirect / Specified voltage AC/DC
Description Typ Ia=15mA; gm=2.7mA/V at Va=Vs=130V and -Vg=8V.
Va =400V max; Vs =300V max. 
Dimensions (WHD)
incl. pins / tip
40 x 113 x mm / 1.57 x 4.45 x inch
Information source Universal Vade-Mecum, Electron Valves and Semiconductor Devices   
RTR4142: Ludvig R
Ludvig Rylander


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