Radioconstructor `` Start-7173 '' (ULF preliminary).

Radio and electrical constructors, sets.Audio AmplifiersSince 1984, the radio designer "Start-7173" (ULF preliminary) has been producing the Kamenets-Podolsk plant "Electropribor". RC allows to assemble a stereo low frequency preamplifier from parts on a printed circuit board, designed to work in the paths of high-quality sound reproducing devices. It can be connected to the input of any power amplifier with a sensitivity of 0.5-1V with an input impedance of at least 10 kOhm. The amplifier has two identical channels. Operating frequency range, with unevenness of 1.5 dB - 20 ... 20,000 Hz. Nonlinear distortion coefficient, at U out. = 1V, no more: at a frequency of 200 Hz - 0.05%, at a frequency of 5000 Hz - 0.05%, at a frequency of 16000 Hz - 0.05%. Sensitivity, at U out. = 1V: pickup 250 mV, radio receiver - 20 mV, microphone - 3 mV. Noise level, not worse than -65 dB. The depth of tone control at a frequency of 40 Hz ± 12 dB, at a frequency of 16 kHz ± 12 dB. Supply voltage 12 ... 18 V. Dimensions of the amplifier - 92x167x35 mm. Weight 150 gr.