A walkie-talkie is a hand-held, portable, two-way radio transceiver. First used for infantry, similar designs were created for field artillery and tank units, and after the war, walkie-talkies spread to public safety and eventually commercial and jobsite work. Walkie-talkies are handheld, portable radios: they communicate wirelessly on a single, shared frequency band.
How to work walkie-talkie?
A group of people who are using walkie-talkies to talk to one another have to tune in to the same frequency band, which is called a channel.
Businesses use walkie-talkies so that employees can chat efficiently in and around their indoor and outdoor structures. Wilderness lovers tote walkie-talkies so that they can keep in touch during hiking or hunting trips out where cell phone cover age is non-existent.
When communication devices work this way, they’re described as half-duplex, as opposed to full-duplex.
Their radio goes quiet as their loudspeaker switches over to a microphone. As they talk into it, their words are converted into radio waves and beamed out on the prearranged channel (a frequency around 460 MHz).
Since radio waves are part of the electromagnetic spectrum, they travel at the speed of light (300,000 km/second or 186,000 miles/second), so the waves are picked up almost instantaneously by the other handsets.
Components of Walkie-Talkie:
- Speaker: allows user to communicate with the receiver.
- Morse code circuit board: transfers signal between devices.
- Morse code key: press to send Morse code signals.
- Printed circuit board: holds microchips for electrical function.
- Speaker amplifier: increases sound between devices.
- Antenna: sends and receives radio waves.
- Power button: turns device on/off.