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Radio - A brief information and history

With the help of a radio, it is possible for people to convey their messages from one place to the other without any problems or issues. This is done with the help of the radio waves which allow the messages to be released into free space and thus even though they could not be heard or seen by human beings, if a radio is available within the room of the person, these signals and messages could easily be picked up through it. It was in the year 1900 that the human voice was successfully transferred through radio in a wireless form by Roberto Landell de Moura of Brazil. Since then, there have been various other changes that have taken place, allowing radio to be one of the most popular modes of communication even today, after almost a century has been passed since its invention.

Things to consider when buying a short wave radio

History of short wave radio

A short wave radio might have features that are not present in other types of radios. For example, in order to communicate through this radio, the person is required to use the high frequency (HF) section completely and the upper part of the MF or medium frequency. This means the length of the waves released ranges from around 1800 kHz to 30,000 kHz. Just as the name suggests, the length of the waves released and received through this radio is shorter in nature and are around 200 meters in length. They were first discovered in December 1921 and in 1922, when an experiment was conducted, it was found that at a distance of 200 meters through these short waves, there were around hundreds of people who were heard by those who were experimenting on making this radio successful. They soon gained popularity and even more people got involved in its growth and development. Marconi was even able to transmit signals from around 32 meters and even now, this is an important discovery.