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The high-frequency "E12-1A" inductance meter and capacitance meter from I quarter of 1965 was manufactured by the Gorky plant named after Frunze. Since the second half of 1970, the device was called as "E7-5A". Both devices are the same. The "E12-1A" device is designed to measure small inductances and capacitances (capacitors should be with low losses: air, mica, ceramic, etc.). Technical characteristics of the device: Limits of inductance measurement: from 0.05 μm to 100 mg (5 subranges). The measurement is performed at the following frequencies: І subrange: 1.55 ... 1.1 MHz. II subrange: 505 ... 355 KHz. III subrange: 155 ... 110 kHz. IV subrange: 50.5 ... 35.5 KHz. V subrange: 15.5 ... 11.0 kHz. Limits of measuring tanks: from 1 to 5000 pf. The measurement is performed at frequencies of 300 ... 700 KHz. Power supply: 220 V. Power consumption: 20 watts. Dimensions of the device: 390x280x290 mm. Weight: 15 kg.