Vacuum tubes produced in the former Soviet Union - and in present-day Russia - carry their own unique designations.
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In the 1950s a 5-element system (GOST 5461-59, later 13393-76) was adopted in the (then) Soviet Union for designating receiver vacuum tubes.
Russian Empire | Russian language | Russian Academy of Sciences | Russian Orthodox Church | Russian Civil War | Russian Revolution | Russian Soviet Federative Socialist Republic | Imperial Russian Navy | Russian Far East | Russian Revolution (1917) | Russian Navy | Russian Air Force | Imperial Russian Army | Russian literature | The Tube | Russian ruble | Russian Academy of Theatre Arts | Communist Party of the Russian Federation | Russian Provisional Government | Russian Museum | russian language | Russian Airborne Troops | Russian avant-garde | Russian Ark | Russian-American Company | Cathode ray tube | White Russian | Russian Turkestan | Russian battleship Rostislav | Allied intervention in the Russian Civil War |