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ID = 35255
United States of America (USA)
Brand: National Union Radio Corp.; Orange (NJ)
Tube type:  Transmitting Triode, air cooled   Power/Output 
Identical to 311H
Similar Tubes
Normally replaceable-slightly different:

Base Top contact with a cap.
Filament Vf 10 Volts / If 3.2 Ampere / Direct
Description Convection cooled 100 Watt max anode dissipation; thoriated-tungsten filament. 4-pin bayonet jumbo base. Mu 12. Similar to 211C with anode to the top cap. 
Weight 227 g / 8.01 oz
Information source Tube Lore (I)   

311h_so.png 311H: ARRL Handbook 1972
Anonymous 10 Collector


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