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ID = 81077
United States of America (USA)
Brand: National Union Radio Corp.; Orange (NJ)
Tube type:  Transmitting Triode, air cooled   UHF 
Identical to CNU8011 = 8011

Was used by Radar
Filament Vf 8.2 Volts / If 7 Ampere / Direct

Forced-air cooled 'micropup' UHF transmitting trode. fmax 600 MHz.
Used in several VHF airborne radar sets.
National Union name for the 8011.

National Union also built lots of this triode marked as 710A for Western Electric.

Information source -- Collector info (Sammler)   

Collection of



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