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ID = 33549
Brand: Tungsram; Budapest (see also British T.)
Tube type:  Vacuum Pentode   Power/Output 
Identical to PP2018_B5+1 = B2043_B5+1 = P2020N_B5+1 = ULP204
Similar Tubes
Normally replaceable-slightly different:
Other base:
First Source (s)
1931 : -- Original-techn. papers.

Base Europe B5+1Pin (seldom, Eu U)
Filament Vf 20 Volts / If 0.18 Ampere / Indirect / Specified current DC = (Series working)
Description It's an output pentode of the new series of indirectly heated tubes for DC mains operation with standardized 180 mA heater current. Simultaneously it was the first indirectly heated output tube in continental Europe. It was available in 2 base versions.[Jacob Roschÿ, 2003-01-22] 
Text in other languages (may differ)
PP2018_B5+1: Röhrensammlung
Wolfgang Bauer

More ...
PP2018_B5+1: Telefunken Werkstattbuch
Wolfgang Bauer


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