Walkie-talkies are mobile and portable transceiver devices with the help of which operational communication is carried out. The history of the active use of portable radios began since the Second World War, and after the end of the war period, it confidently entered peacetime. Now radios are used mainly by oran organizations and taxi drivers, police and ambulances, workers of metallurgical and construction enterprises, as well as the army and the Ministry of Emergency Situations. In addition, the number of people using portable radios while traveling, fishing, climbing mountain peaks, as well as extreme sports is constantly growing.
I would like to note that the presence of mobile phones has not supplanted this type of communication from our lives. In certain situations, walkie-talkies even have significant advantages. It is clear that walkie-talkies are irreplaceable in places where there is no mobile coverage. During hiking, the radios allow you to create an autonomous network for communication of several people in mountainous and forest areas, on city streets and water bodies. It is convenient to communicate with the help of the radio while traveling by cars and boats. Yes, and advanced technology is constantly improving walkie-talkies, making them more reliable, comfortable and meeting the requirements of modern design. Among the most popular are Midland walkie-talkies, which have been successfully tested for range and quality of communication, both by amateurs and professionals. Also noteworthy are the portable radios Kenwood, Vtrtex, Motorola.
When choosing a walkie-talkie, you should take into account the operating conditions and determine the goals. The radio stations are characterized by different frequency ranges. To create a reliable connection, you need to pay attention to the presence of electromagnetic interference, buildings, trees, terrain. To ensure communication in urban environments, powerful walkie-talkies with a high frequency are chosen. They operate in the 433-446 MHz range permitted for civilians. The 0.7m wavelength is well suited for use in reinforced concrete buildings. Communication in rough terrain and in the forest requires the use of radio waves with a length of 11 m, allowing it to bend around hills and forest plantations. For these purposes, radios of the 27 MHz range are used. On the route, communication is carried out using radios with AM modulation with a frequency of 27 MHz.
In addition, when choosing a walkie-talkie, you should take into account the power, which affects its range. Do not forget that in forest areas this distance will be reduced by almost half, and in urban areas - by three times. You should also pay attention to the battery life, the number of channels, dimensions and service life.
