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S2_Ferranti

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ID = 72271
       
Country:
Great Britain (UK)
Brand: Ferranti, GB
Developer: Ferranti, GB 
Tube type:  Screen-grid Tetrode   RF/IF-Stage 
Identical to S2_Ferranti
First Source (s)
16.Mar.1934 : Wireless World (The), London (WW, 79)

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Top contact screw type.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.15 Ampere / Direct / Battery =
Description

Metallised


Limits: Va <150; Vg2 <70;

Typical Va=120, Vg2=60, Ia=2.3mA, Vg1=-1.0, ra=300kΩ, gm=1.1mA/V

 


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