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ID = 27353
Brand: Fivre - tubes; Milano (MI)
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   Power/Output 
Identical to RTP4 = E443H = L496D = PP4101 = RES964 = DW9
Similar Tubes
Normally replaceable-slightly different:
Other base:
First Source (s)
Apr.1933 : Philips Bulletin
Successor Tubes 1935   AL1  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 1.1 Ampere / Direct / Specified voltage AC/DC

By model of the very similar USA-types PZ or 47 from 1931, with the E443H Philips now introduced output pentodes in Europe with equally 250 Volts screen and plate voltage, it also brought the 7k-ohms load-standard to Europe which remained until the end of the tube era. The former E443N required 400 Vp, but extra 200 Vg2 [J.R. 2003-01-19]

Text in other languages (may differ)
Information source Taschenbuch zum Röhren-Codex 1948/49   
RTP4: A. De Poi's collection
Alessandro De Poi

More ...
RTP4: Telefunken Werkstattbuch
Wolfgang Bauer


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