Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 11557
Great Britain (UK)
Brand: Lissen Ltd.; London and Richmond, Surrey
Tube type:  Vacuum Pentode   Power/Output 
Identical to PT225 = AS241
Similar Tubes
Other base:
First year 1929 Wireless World (The), London (WW, 79) Tests in January 1 1930 issue

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)
Was used by Radio/TV-reception etc.
Filament Vf 2 Volts / If 0.25 Ampere / Direct / Battery =

Diese Röhre gibt es auch mit 4-Stift- Europasockel (B4).

(Codex falsch erfasst!)

Information source History of the British Radio Valve to 1940   p. 147
- - Manufacturers Literature   1930
Taschenbuch zum Röhren-Codex 1948/49

s_3_g_18.gif PT225: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

Just Qvigstad
PT225: own collection
Peter den Boer

More ...
Usage in Models 4= 1932 ; 1= 1933? ; 4= 1934

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):9

Collection of



You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]