Two Way Radio Transmitting Aid

A two-way radio is a device that can both receive and transmit also known as a transceiver. These types of radio are usually available as mobile or stationary and can be handheld. They are usually nicknamed walkie-talkies and are kept very simple on design. The device usually has one button on the front that answers any calls made. Walkie-talkies are different from mobile phones in that a mobile is able to transmit and receive at the same time, using two different frequencies at a time.

Walkie-talkies (formally known as a handheld transceiver) usually look very similar to a telephone if not slightly larger, with an antenna protruding from the top of the unit. Unlike a telephone device when receiving a call the sound is only loud enough for the user to hear, walkie-talkies have a built in speaker that can be heard by the user and anyone in the surrounding area.

Historically, the first two-way radio to be nicknamed 'walkie-talkie' was the model made by Motorola SCR-300 that had been created in 1940. Motorola also created the hand-held AM SCR-536 radio that was invented during the war but named the 'Handie-Talkie' Al Gross, a Canadian inventor also worked on the development of the walkie-talkie and according to some, actually invented it.

The AM SCR-536 was the radio used predominately during the Second World War. People often confuse this as a walkie-talkie but this radio was named the 'Handie-Talkie' as it could be held entirely in one hand. Both devices functioned on vacuum tubes and used dry cell batteries. The name Handie-Talkie and product were made trademarks of Motorola by 1951.

The hand-held devices quickly became invaluable tools for services such as the police and emergency services. These services used radio frequencies that were set up solely for these purposes. It is hard to imagine today emergency services without the use of them, as they are the reason valuable information within emergency situations are passed on.

Early two-way devices only allowed one station to transmit at a time on the walkie-talkies, whilst the others would have to listen as all the signals were on one frequency. This is known as 'simplex mode'. The walkie-talkies invention ended up taking away the jobs of those working on ships, as traditionally on ship radio officers used Morse code. When voice was able to be transmitted through with this new technology, dedicated workers were no longer needed and two-way communication began to show its importance within personal, commercial and military roles.

Walkie-talkies have also not only just been used for workers, but have become a popular child's toy throughout the years. Originally the children's versions were limited to how many watts of power on transmit. Although the children's versions are less powerful, they are still fully functioning and work now on the same frequency as cordless telephones and baby monitors.

Two-way radio has shown to have many more benefits than using mobile telephones, as they are much cheaper and do not have any call charges. Baby sitters have found the device extremely helpful also as a walkie-talkie has a wider range than most baby monitors.

The invention of the walkie-talkie really has changed the way in which businesses work and have proven to be a vital part of our emergency services. Whether you are babysitting and wish to know at all times that the child is content, or you need to radio for an emergency, the invention of the two-way radio has enabled this.

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