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The television receiver of the black-and-white image "ТÐ-1" at the end of 1938 was developed at the All-Union Scientific Research Institute of Television). Projection TV "ТÐ-1" (Television Screen, 1st model) designed by Ing. IM Zavgorodnev and BS Mishin, a projection kinescope with a diameter of 10 centimeters with enhanced brightness was created by Ing. KM Yanchevsky. The first sample of the television was installed in the Leningrad lecture hall in early 1939, and a total of 10 televisions were manufactured. The TV is designed to receive programs of the Leningrad and Moscow television centers with the decomposition of the image into 240 and 343 lines, respectively, at a frequency of 25 frames per second. The image is projected on a special matte screen in a frame with dimensions of 100x120 centimeters from its reverse side. Such a screen, together with a powerful soundtrack, allows you to simultaneously serve an audience of 100 ... 150 people. In 1940, a sample of the TV-2 was created with an even higher brightness of a kinescope with a diameter of 20 centimeters and a fabric screen size of 200x300 centimeters and a direct projection that could serve an audience of 200 ... 300 people. If on a smaller matt TV-screen "ТÐ-1" the image was still quite satisfactory in quality, although it was obviously insufficient in brightness, then on the big screen a very noticeable lineiness of the image was added to the weak brightness, especially when receiving OLTC by 240 lines. TV "TE-2" was made only 2 copies, one for the city of Leningrad and one for the city of Moscow. Experiments on projection television continued until 1941.