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UBL21(N)

Information - Help 
ID = 69165
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Double Diode-Pentode   Power/Output 
Identical to UBL21(N)
Similar Tubes
Normally replaceable-slightly different:
  UBL21

Base Loctal-8, B8G (Sylvania, 1938)
Was used by Radio/TV-reception etc.
Filament Vf 55 Volts / If 0.1 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
 
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UBL21(N): N.H.
Norbert Haselbach

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