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ID = 20054
Great Britain (UK)
Brand: Lissen Ltd.; London and Richmond, Surrey
Tube type:  Vacuum Pentode   Power/Output 
Identical to PT16_Lissen
Similar Tubes
Heater different:
Multiple differences or of other kind:

Base Europe 5-Pin , B5 + side contact
Was used by Radio/TV-reception etc.
Filament Vf 16 Volts / If 0.25 Ampere / Indirect / Specified current AC/DC ~ = (Series working)

Pa <7.5W, Va<250, Vg2<200;

Typ ia=31mA, Ig2=4, Vg1=-8.0, Rload=7.5k, Pout= 3W

Information source Wireless World (The), London (WW, 79)   Nov 1934
History of the British Radio Valve to 1940   p. 147

b5~~28.png PT16_Lissen: Fin Stewart
Fin Stewart

Just Qvigstad

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