Sputnik-1,2 black-and-white television receiver.
Black and white televisionsDomesticSputnik-1 and Sputnik-2 black-and-white television sets were developed and manufactured in several copies in 1959 and 1960. It is not established where these first domestic transistor TVs were developed and produced. Perhaps at the Omsk Television Plant, since Sputnik tube TVs were produced there. Perhaps this is the Leningrad Research Institute of Television ... Fully semiconductor TVs "Sputnik-1" and "Sputnik-2" are designed to receive broadcasts broadcast only on the first television channel (49.75 ... 56.25 MHz). The first TV uses 30 transistors, 9 germanium diodes and 9 selenium rectifiers, and the second 28 transistors, 7 diodes and 8 selenium rectifiers. Special non-standard and non-serial kinescopes are used in TVs. The first TV has a 23LK2B kinescope with an image size of 140x180 mm, and the second 25LK1B with an image size of 153x192 mm. Televisions are made in a desktop version, however, their small dimensions and weight allow them to be used as automobiles. The case of any of the TVs is metal and coated with nitro lacquer. The loudspeaker is located on the side of the case. The TV is set up with six control knobs located on the back of the case. The battery is located outside and is connected to the TV through the connector. Structurally, any of the TVs is made on two printed circuit boards, mounted on a light metal frame. The use of p / n allowed to reduce the power consumption and weight of the TV. The only electrovacuum device is a kinescope with a rectangular screen. The deflection of the beam is magnetic, the focusing of the image is electrostatic. Due to high p / p noises, mode fluctuations when temperature conditions change, power supply voltage changes, etc. a number of circuit solutions have been applied to reduce these effects on the operation of the TV. When developing TVs, designers used all the possibilities to obtain the highest efficiency from each cascade, without reducing quality indicators. The main technical data: The sensitivity of the image channel is 50 µV. Resolution in the center of the screen is 500 lines. The band of reproducible sound frequencies is 160 ... 6000 Hz. Rated audio output power 0.3 W. Power is supplied from a car battery with a voltage of 12 V. The described TVs "Sputnik-1,2" were demonstrated at various radio exhibitions, including at the Exhibition of Economic Achievements in Moscow, but for technical reasons they were not included in the series.
