Receiving and amplifying installation `` PUU-25 ''.
Amplifying and broadcasting equipmentReceiving and amplifying installation "PUU-25" from the autumn of 1937 was produced by the Aleksandrovsky radio plant. The 25-watt receiving and amplifying unit is designed in the form of a desktop cabinet, in which an all-wave receiver SVD-M (without a speaker), an ULF and a gramophone device are mounted. The installation is intended for radioactivation of workers' clubs, factory settlements, summer gardens, restaurants, sanatoriums, etc. and can also be used at small radio sites. The unit is powered by an alternating current network with a voltage of 110, 127 or 220 V. The unit is designed for broadcasting radio stations, gramopis and for transmission from a microphone. The transition from one type of broadcast to another is carried out using a special switch. Unit dimensions - 450х380х670 mm, unit weight - 52 kg. Output power 25 watts. Power consumption - 210 watts. The range of reproducible sound frequencies is 50 ... 7500 Hz. The rest of the properties are determined by the data of the SVD-M receiver.