In 1957, Leonud Kupriyanovich received a copyright certificate for “radiophone” – an automatic radio telephone with a direct line. Through an automatic telephone station this unit could be connected to any subscriber of a telephone network within the coverage area of the “radiophone” transmitter. At that time it was the first valid set of radio telephony equipment, demonstrating the principle of the “radiophone”. It was named after the inventor, LC-1 .
“The telephone is small in size, its weight does not exceed three kilograms” – wrote “Science and Life”. “The batteries are placed inside the case of the device; period of continuous use of them is 20-30 hours. LK-1 has 4 special vacuum tubes, so by tuning the antenna, power at short wavelengths is sufficient for communication in the range of 20-30 miles. On the unit are placed 2 antennas and on its front panel are installed 4 switches for making a call, the microphone (which is separate from the headphones) and a dial disk.”
“Usage of the first mobile phone was not as comfortable as it is now.” (Magazine “Young Technician” #7, 1957″)
“Kupriyanovich with the LC-1 in the car. Right from the device – speakerphone.” Magazine “Driving”, 12, 1957
“LK-1 and the base station”. ‘Young Technician”, 2, 1958.
The model of 1958 was more like a mobile phone (“Tech-youth”, 2, 1959)
In 1961 L. Kupriyanovich demonstrated a pocket cell phone.
Also in the late 1950s, in the Soviet Union the development of a system of automatic mobile radios called “Altai” had began. One of the main requirements was that its usage should be maximally similar to the regular telephone network application, i.e. manual switching of channels and the need to call the dispatcher, were excluded.
In 1994, the network of “Altai” worked in 120 cities of the ex-USSR, and 53% of all mobile phone users had “Altai”