UGB 1941
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The UGB and GB-8 installations were produced from the beginning of 1941 at the Voronezh Radio Plant and at the Kolomna gramophone plant, respectively. In 1931, engineer B.P. Skvortsov created the "Speaking Paper" recording device of that time. The sound from the microphone after amplification was fed to an electromagnet, which oscillated a black ink pen, under which a paper tape was being pulled. After that, the tape was passed through a photocell, directing light from a powerful lamp to the paper. The recorded fluctuations caused changes in the voltage at the photocell output, amplified and fed to the loudspeaker that played the recorded. The phonograms were easy to copy by printing method in any typography and without the slightest loss of the quality of their sound. The first experimental devices of the UGB unit were launched in 1941, but a series of 500 units was released only at the end of 1944. The UGB unit was a combination of a 6N-1 radio receiver with a powerful push-pull terminal stage of the low-frequency amplifier and a remote speakerphone and the GB unit itself. The prefix "GB-8" was released until July 1941 by the Kolomna gramophone plant in an amount of about 500 copies. It could be used with any radio receiver. With this, the release of the "GB-8" in Kolomna was completed, and in Voronezh I repeat, the issue was released at the end of 1944. Since 1945, the plants of the plant have not been released, as magnetic recording has developed all over the world. It was pointless to go against it, although ideologically the Talking Paper apparatus had an advantage, unlike tape recorders, its owner would have to listen to what they were selling in stores, the Talking Paper home appliance worked only for reproduction, and since the technology of the apparatus was domestic One could not be afraid of the penetration of Western ideology, with records brought from abroad. Now preserved devices "Talking paper" and records to them can be seen in several museums, for example in the PM mountains. Moscow
Documentation:
Information from collection of Valery Khartchenko