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Since the fall of 1937, the PUU-25 receiving-amplifying unit was produced by the Alexander Radio Plant. The 25-watt receiving and amplifying installation is designed in the form of a desktop cabinet in which the SVD-M all-wave receiver (without speakers), the ULF receiver and the phonograph are mounted. The installation is intended for the radio installation of workers' clubs, factory villages, summer gardens, restaurants, a sanatorium, etc. and can also be used on small radio centers. The unit is powered by an alternating current network with a voltage of 110, 127 or 220 V. The installation is intended for broadcasting radio stations, grammar recordings and for transmitting from a microphone. The transition from one type of broadcast to another is carried out using a special switch. The dimensions of the installation are 450x380x670 mm, the mass of the installation is 52 kg. Output power 25 watts. Power consumption - 210 watts. The range of reproduced sound frequencies is 50 ... 7500 Hz. The remaining properties are determined by the data of the SVD-M receiver.