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Soviet ultrahigh frequency triode 6S17K-V (6C17К-В) is a tube enclosed in metal-ceramic case. Outer metal parts are silver plated. This small tube was already used in some of the DIY amp projects with very good results. Its weight is only around 5 g and service life is not less than 2000 operating hours. New in box tubes, directly from the old reserves. Year of production: 1980 (please look at the gallery).