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PT225_4pin

Information - Help 
ID = 20068
       
Country:
Great Britain (UK)
Brand: Lissen Ltd.; London and Richmond, Surrey
Tube type:  Vacuum Pentode   Power/Output 
Identical to PT225_4pin
Similar Tubes
Other base:
  PT225

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914 Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.25 Ampere / Direct / Battery =
Description

Pa <1.5W, Va=Vg2 <150V

Typ Ia=8mA, Ig2=2, Vg1=-6, Rload=18.7k, Pout=400mW.

 
Text in other languages (may differ)
Information source Wireless World (The), London (WW, 79)   Nov 1934
- - Manufacturers Literature   1930
History of the British Radio Valve to 1940

s_3_g_19~~2.gif PT225_4pin: Fin Stewart
Fin Stewart


Just Qvigstad
pt225_1~~1.png
PT225_4pin: own collection
Peter den Boer

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Collection of

 
pt225_1~~1.jpg

PT225_4pin
 

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