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Measuring parameters of transistors "IPT-1" (L2-1) from 1957 and from 1964, respectively, produced the Minsk plant "Radiopribor". The device was originally manufactured under the name '' IPT-1 '' then according to the new GOST it was renamed to '' L2-1 ''. It is designed to quickly determine the suitability of low-power transistors and measure their basic parameters. Power is supplied from 2 batteries KBS-L-0.5 with a total voltage of 9 volts. Dimensions of the device 210x150x90 mm. Its weight is 2 kg.