Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 46237
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Marconi-Osram - (Valves/Tubes); GB 
Tube type:  Vacuum Pentode   Power/Output 
Identical to MPT4_5pin_Catkin
Similar Tubes
Other shape (e.g. bulb type):
Other base:
Other base and data slightly different:
First Source (s)
1934 : History of the British Radio Valve to 1940 p. 189

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928 Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC

Pa<8W; Typ 2.5W audio output at Va=250; Ia=32mA; Rload=8k. Also available with 7 pin base and in standard form.

Information source The Saga of Marconi Osram Valve   p. 221, 222, 229 & 333
History of the British Radio Valve to 1940   p. 147 & 189
Taschenbuch zum Röhren-Codex 1948/49

mpt4_so~~1.png MPT4_5pin_Catkin: rtt
Anonymous 10 Collector

Just Qvigstad
MPT4_5pin_Catkin: Marconi Advertisement
Anonymous 15 Collector

Usage in Models 1= 1934

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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]

Data Compliance More Information