Amateur radio

Some people use radios for fun.

They call this ham radio. People use it to talk to others. They can talk to people far away. They can even talk to space!

To use a radio, you need a license. You must pass a test first. This test teaches you how radios work. It also teaches you the rules.

Radio users have special names. These names are called call signs. You must say your name when you talk. You say it at the start. You say it at the end, too.

Radio can help during big storms. This happens when other tools break. People use batteries to keep radios on. It is a great way to help.

Many people around the world do this. It is a fun hobby for everyone.

Amateur radio is also called ham radio. It is a way to talk using radio waves. People do this for fun or to learn. They also use it to help during emergencies.

To use a radio, you must have a license. A license is a permit from your government. You must pass a test to get one. The test asks about electronics and radio rules. Each person gets a special name called a call sign. You must say your call sign when you talk. You say it at least every ten minutes.

People use many ways to send messages. Some use their voices. Others use Morse code. This is a way to send messages using dots and dashes.

Some people even use computers to send data.

Radio signals can travel very far. They can bounce off the moon or even the aurora borealis.

Some people even talk to astronauts in space!

About 2 million people do this around the world. It is a big and helpful community.

Amateur radio, often called ham radio, is a special way to use radio waves. People use it for many things like fun, learning, and technical experiments. It is also a vital tool for emergency communications when other services fail.

Unlike professional radio used by taxis or planes, amateur radio is for non-commercial use. This means people do it for personal interest rather than to make money. It is a way to connect with others across the globe.

To join this community, you must follow specific rules and steps. First, you must pass an exam to earn an amateur radio license. This test checks what you know about electronics and radio theory. Once you have a license, the government gives you a unique call sign. You must use this call sign during your transmissions. You should say it at least every ten minutes and at the end.

There is a long history behind this hobby. People have been experimenting with radio since the late 19th century. In 1909, a book listed 89 amateur stations in Canada and the United States. The name "ham" actually started as a mean way to mock people. Professional telegraphers used it to describe operators with poor skills. However, the community reclaimed the word and now uses it with pride.

Radio operators use many different ways to send messages. Some people use their voices through modes like FM or AM. Others use Morse code, which is a way of sending signals using dots and dashes. Modern operators even use computers to send digital data.

Some people use special equipment to send television images over short distances. These signals can travel through the air to reach others far away.

Radio waves can do amazing things in our world. Signals can bounce off the moon or even the aurora borealis.

Some licensed astronauts even use amateur radio from the International Space Station!

In 2011, it was estimated that 2 million people were active in ham radio. This includes about 830,000 stations in the Americas and 750,000 in Asia and the Pacific.

Amateur radio, frequently called ham radio, is a specialized use of the radio spectrum. It is dedicated to non-commercial communication, technical experimentation, and recreation. People also use it for self-training, radiosport, and emergency communications.

Unlike professional services like maritime or aviation radio, amateur radio has no pecuniary interest. This means participants do not use it for monetary reward. It serves as a way for hobbyists to explore science and connect globally.

To participate, an individual must follow strict technical and operational rules. These rules are established by the International Telecommunication Union (ITU) through Radio Regulations. National governments manage these rules and issue individual station licenses. Each license includes a unique call sign that must be used during transmissions. Operators must use their call sign at least every ten minutes and at the end of a contact.

To earn a license, candidates must pass an examination. These tests cover radio theory, electronics, national regulations, and safety protocols.

Licensed operators are authorized to transmit on specific frequency ranges called amateur radio bands. Within these bands, they can choose various modes of communication. Some bands are restricted to specific types of signals. For example, an operator might use voice, text, or data.

This flexibility allows for local, national, and worldwide communication. Some operators even reach stations in space. Modern technology also allows computers to connect through virtual private networks on the Internet.

Radio technology offers many different ways to send information. Voice modes include frequency modulation (FM), single sideband (SSB), and amplitude modulation (AM). FM provides high audio quality, while SSB is efficient for long distances. Radiotelegraphy, or continuous wave (CW), uses International Morse code. CW is a very old mode that remains useful today. It works well under weak-signal conditions and is simple to build.

Digital modes have also grown with the help of personal computers. These include radioteletype (RTTY), packet radio, and newer protocols like FT8. Some operators even use fast-scan amateur television (ATV) to transmit images.

There is a rich history behind this community. Amateur radio experimentation began in the late 19th century. By 1909, a wireless telegraph list recorded 89 amateur stations in North America. The term "ham" was originally a pejorative used by professional telegraphers. They used it to mock operators with poor Morse code skills. However, the community reclaimed the word as a label of pride.

This shift occurred by the mid-20th century.

Amateur radio enthusiasts have made significant scientific contributions. They are credited with discovering skywave propagation. Their research has even founded entire industries, such as quartz piezoelectric resonator experimentation between 1924 and 1934. Operators also act as citizen scientists by collecting propagation data. They support atmospheric science research and provide vital communication during natural disasters.

When commercial services fail, battery-powered amateur equipment can save lives.

Global participation in amateur radio is quite large. In 2011, the American Radio Relay League estimated 2 million active people worldwide. The community is divided into three regions by the International Amateur Radio Union (IARU). Region 2, the Americas, has about 830,000 stations. Region 3, South and East Asia and the Pacific, has about 750,000 stations. Region 1, covering Europe, the Middle East, Africa, and the CIS, has about 400,000 stations.

Even astronauts on the International Space Station use these systems to talk to Earth.