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ID = 25233
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Half-Wave Mercury-Vapor Rectifier 
Identical to 1177

Base No base Top contact screw type.
Filament Vf 1.92 Volts / If 60 Ampere / Direct
Description Mercury vapour and gas filled rectifier; 25A, 110 Pb cells max. Two strip and one screw contacts base. 
Text in other languages (may differ)
Weight 1060 g / 37.39 oz
Information source - - Manufacturers Literature   7Z2 7610, Oct. 1966 issue.

1177_so.png 1177: rtt
Anonymous 10 Collector

1177: Valvo Röhrentaschenbuch 1957
Anonymous 10 Collector

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