Literature cited
Measuring Amplifier Type 28IM, Description and Operating Instructions (1954).
Three-Stage Amplifier Type 28I, Description and Operating Instructions (1953).
Additional information
Translated from Izmeritel'naya Tekhnika, No. 5, pp. 73–74, May, 1967.
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Kotel'nikov, N.I., Stepanov, N.P. Testing of measuring amplifiers U2-1A (28IM) and 28I. Meas Tech 10, 617–618 (1967). https://doi.org/10.1007/BF01007674
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DOI: https://doi.org/10.1007/BF01007674