С1-91

The С1-91 (Cyrillic; latin transliteration S1-91) is a general-purpose 100 MHz scope made by the Soviet Research and Development Institute of Radio Measuring Instruments in Vilnius (present-day Lithuania). It takes one horizontal and two vertical plug-ins.

Vilnius Research С1-91
100 MHz mainframe С1-91 front view Produced from 1977 to (?) Manuals С1-91 service manual (partial, with schematics) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

It was produced in various versions at the Vilnius and Minsk plants, individual blocks were made in Bryansk. It was the company's best-selling model from 1984-1989, with 22780 units produced, at an average price of 3800 rubles^[1].

Key Specifications

Bandwidth	100 MHz
CRT	17LO1I, 100 mm × 120 mm
Power	150 W (switchmode PSU)
Weight	15 kg
Features	three plug-in bays thirteen plugin types digital readout

References

↑ Alma Mater Vilnius Radio Electronics, 2021. p.147+

Pictures

С1-91 scope with two Я4С-90 amplifiers and a Я4С-91 timebase (German labels)
S1-91/4 18 GHz sampler (1981)

[1] Alma Mater Vilnius Radio Electronics, 2021. p.147+

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