Measuring amplifier '' 28 IM ''.

Instruments for adjusting and controlling the PTA.The measuring amplifier '' 28 IM '' has been produced since 1955. Since 1960, the name of the amplifier has been changed to "U2-1A". Measuring amplifier `` 28 IM '' (U2-1A) is intended for testing and tuning special radio equipment. The device makes it possible to amplify and measure weak signals of low frequency, and together with measuring lines to measure the coefficient of the traveling wave.