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ID = 83721
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   Power/Output 
Identical to B443N
Similar Tubes
Other shape (e.g. bulb type):
Predecessor Tubes B443  

Base Europe 5-Pin , B5 (Eu O, F, O5A) 1928
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Specified voltage AC/DC

The original B443 one was on the market as from 1927, this kind of internal construction was discontinued in the later years.

On the other hand, there was still a need for replacement in the older radio sets. So Philips started a new production line, but with a more modern technique. The letter "N" was added which means new, although the electrical performance should be equal to the genuine B443.

Text in other languages (may differ)
B443N: O.J.
Ottó Jancsek


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