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MUM4

Information - Help 
ID = 33050
       
Country:
Great Britain (UK)
Brand: Marconi-Osram - (Valves/Tubes); GB
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Mag. Eye, 2 ranges, 2 shadow angles   Indication 
Identical to MUM4 = UM4

Base Octal (Int.Octal, IO) K8A, USA 1935
Filament Vf 13 Volts / If 0.1 Ampere / Indirect / Series, AC/DC /
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mum4_so.png
MUM4: rtt
Michael Schlör

 

Usage in Models 1= 1948

Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

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