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P220_Lissen

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ID = 20927
       
Country:
Great Britain (UK)
Brand: Lissen Ltd.; London and Richmond, Surrey
Tube type:  Triode, vacuum   Power/Output 
Identical to P220_Lissen
First year 1929 The Wireless World, London (WW, 79) Tests in Jan 1 1930 issue.

Base Europe 4-Pin (A, 4A, B4, since 1914)
Filament Vf 2 Volts / If 0.2 Ampere / Direct / Battery =
Description Ra 4700 ohms, Gm 1.5mA/V at Va=100 and Vg=0. 
 

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