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ID = 19568
Great Britain (UK)
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Screen-grid Tetrode   Power/Output 
Identical to N30
Similar Tubes
Other shape (e.g. bulb type):
Normally replaceable-slightly different:
Multiple differences or of other kind:
First year 1934 -- Original-techn. papers. 70 Years of Radio Valves

Base British-7-Pin, old (M7A)
Was used by Radio/TV-reception etc.
Filament Vf 13 Volts / If 0.3 Ampere / Indirect / Specified current AC/DC ~ = (Series working)

Pa <8W, Pout 3.2W at Va=Vs=250V and Ia=32mA

Same as N30/G but Catkin version.

Text in other languages (may differ)
Information source Wireless World (The), London (WW, 79)   1934 Data booklet.PT4
The Radio Trade Directory USA 1925   p. 152, 227 & 333
History of the British Radio Valve to 1940
The Saga of Marconi Osram Valve

s_387_g_2.gif N30: W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe † 19.8.20

Just Qvigstad
Usage in Models 17= 1934 ; 1= 1935? ; 3= 1935 ; 1= 1936?? ; 2= 1936

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):24

Collection of



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