A brief history of the miraculous device called two way radios. From an ordinary experiment in a small lab to a common a necessity for every industry all over the world; two way radios have come a long way.
Two-way radios were one of the earliest forms of long-distance communication, besides the carrier pigeon, and they are still used in almost every industry today.
The first advances in two-way radios are widely credited to Hertz. In 1885, Hertz conducted experiments proving that electricity can be transmitted as electromagnetic waves, which he concluded could be sent and received, though saw no real potential in them.
Over a 20-year period this transmitter was refined and gave way to another model known as the arc-transmitter, and though less refined, it was more compact. During the First World War, these advancements in radio transmissions would allow communications with pilots as well as military broadcasts. Installation of radio equipment in aircraft allowed scouts to report back observations in real-time, not requiring the pilot to land on the ground personally.
Two way radio devices have been commercially available since around 1907. Portable two way radios were not introduced until 1923.In 1923 Victorian police were the first to implement the use of wireless communication in patrol cars, which initially took up the entire back seat.
In 1933, the Bayonne, New Jersey police department successfully operated a two-way radio system between police cars and a central station for better response in emergencies. Despite the size and weight hand held two way radios were an immediate hit. They saved steps, made it easy to communicate, made the workplace safer, and increased productivity.
Early two-way schemes required training operators to learn and use Morse code; When voice transmission became possible, dedicated operators were of no use and two-way use became more common.
The original two-way radios were only able to broadcast one signal at a time while other listened, called "simplex" mode, thus you could only send or receive a signal at a time. It wasn't until "full duplex" was available that enabled receivers and transmitters tuned to different frequencies, simultaneous transmission and reception was possible at each end of a radio link. Transmitters could be tuned to different frequencies that signals could be easily broadcast in two-way form.
Many consider cell phones to be an extension of the inventions tested and created by the Marconi Company and Bell Labs back in the 1920s, mainly their car telephone system, a voice-based radio telephone.
This technology has progressed to the point of being so user friendly that nearly any individual can learn how to use a two-way radio easily, professionals and children alike. They’re great fun to use and the feeling of independence they offer is unique.
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