S1-20 (Oscillograf impul'snyj) 1966
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Pulse oscilloscope "C1-20" was produced since 1966. Designed to study the shape of pulsed and periodical voltages, by visual observation. The oscilloscope is used in laboratory and shop conditions. Details in the technical description and operating instructions of the oscilloscope "C1-20".
Documentation:
Information from collection of Valery Khartchenko