S1-15 (Universal'nyj oscillograf) 1974
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The universal oscilloscope "C1-15" was produced presumably since 1974. Together with the preliminary amplifiers "C1-15 / 1", 2, 3, 4 and 5 is designed to study and observe the visual forms of pulsed and continuous electrical processes. Amplifiers are partially described in the instructions and on other pages.
Documentation:
Information from collection of Valery Khartchenko