What is “Ham” Radio?

Kapiti Coast Museum Amateur Radio Station — Callsign ZL6KCM

The following information is provided with kind permission from the website of Julian Moss, G4ILO, Cumbria, UK. Images are from the Kapiti Coast Museum.

What is amateur radio?

Amateur radio (often called ham radio) is a hobby in which people communicate with and experiment with radio.The ability to experiment with radio is an important distinction between amateur radio and other ways in which members of the public are allowed to use radio such as Citizens’ Band, Family Radio Service and Business Radio. Because radio amateurs are allowed to experiment with radio, they are required to pass tests or examinations to prove a level of technical competence before being granted a license. For other types of radio license no tests are required, but experimentation is not permitted and users may only use approved types of equipment with limited power and simple antennas in order that they do not unknowingly cause interference to other radio users.

The ability to experiment also provides an important justification for reserving valuable frequency bands for use by radio amateurs. Radio amateurs are granted a license for the purpose of training themselves in wireless communication. Amateur radio allows you to learn skills valuable for a career in engineering and provides the country with a pool of skilled radio operators for use in times of crisis.

Radio amateurs are permitted to build and modify the equipment and antennas that they use on the air. For many, that is the main interest. Others may do no building or experimenting at all. But because amateur radio equipment can operate on many different frequencies and amateurs are permitted to assemble their own stations using a variety of equipment and use high power, a considerable level of technical knowledge is still required.

The main distinction between amateur radio and other radio services is therefore that amateur radio is a hobby for people who are interested in radio. If you simply want to communicate using radio and have no interest in knowing how it works then CB, FRS or business radio will be more suitable for your needs.

An important distinction between amateur radio and business radio is that radio amateurs are not allowed to use amateur radio for communications of a commercial nature. So you could not use amateur radio to pass messages related to a business activity even if everyone involved had passed the tests and obtained amateur radio licenses.

 Why is the hobby often called ham radio?

The origin of the term ham radio is the subject of much debate, but it is a term that has been in use for decades. One suggestion is that it derives from the Cockney slang ‘hamateur’. Amateurs of all kinds have been called ‘hams’ for a long time – for example, the term ‘ham actor’. Some radio amateurs dislike the term as they feel it has connotations of incompetence and amateurishness.


What do radio amateurs do?

About the only thing that is true of all radio amateurs is that they hold a license that allows them to use and experiment with radio. There is an almost unlimited number of different ways in which they may choose to use this privilege. The following examples are merely a few of the most popular activities.

  • Communicate with others having similar interests. Radio amateurs may use their equipment to converse with other radio amateurs, locally or worldwide. In this modern era of cheap phone calls, Skype and the internet, there are now many ways to achieve this that don’t involve the use of radio. The randomness – never knowing quite who you will talk to, due to the vagaries of radio propagation – is part of what makes ham radio interesting.
  • Collect operating awards and compete in contests. Many radio amateurs compete to collect operating awards or certificates, which are awarded for achievements such as making confirmed contacts with 100 different countries. The interest is in the thrill of the chase, hunting down rare locations and making that contact. Hams also compete in contests where the aim is essentially to make the greatest number of contacts with different locations during a set period.
  • Assist with emergency communications. For some radio amateurs their main reason for being involved in the hobby is to be able to provide a voluntary communications service during local emergencies. The flexibility afforded by the amateur radio license allowing the use of different frequency bands and high power means that amateurs can often provide communications into locations where professional radio systems fail to do so.
  • Experiment with different communications modes. Amateur radio is not just about speaking to people. Many radio amateurs like using morse code, a mode of communication that requires much less power than would be needed to converse using voice over the same distance. They also enjoy perfecting their skills in sending and receiving morse, practising to reach ever-higher speeds. Radio amateurs are allowed to connect a computer to the radio and use digital modes, which allow text-based chat and even the exchange of pictures using radio. The challenge of doing this using radio and seeing how far you can get is what makes this more interesting than doing the same thing using the internet.
  • Build and operate their own equipment. Many radio amateurs get most of their enjoyment from building radios and trying them out on the air. A low power morse code transmitter is one of the simplest electronic circuits you can make and it is an enormous thrill to use such a simple transmitter to make a contact with someone hundreds or thousands of miles away. Making simple receivers is also a lot of fun. More advanced constructors enjoy the challenge of building radios capable of voice communication and using higher power, or constructing an entirely home-built radio station.

These are just some of the things that radio amateurs do. But there are many more activities too numerous to mention. Some people like experimenting with ultra-high frequency communication, operating from hilltops to get the best distances using line of sight propagation. Some like to push the boundaries of communication by bouncing their radio transmissions off meteor trails or even the Moon. Others make contacts using satellites that have been built by radio amateurs and sent into orbit especially for ham radio use.

There are easier ways to communicate with someone if that’s all you want to do. But if radio – with its unpredictable behaviour and different properties at different frequencies – interests you, or if the idea of making contacts with rare, distant locations – perhaps using low power or equipment you made yourself – excites you, then amateur radio is a great hobby that will provide you with a lifetime of interest.


This very early amateur radio transmitter represents the pioneering spirit of innovation and tenacity that the early amateur operators displayed. It was made by the late George Anderson (1913-2008) in the Sanatorium in Dunedin, where he lived for about 18 months. He was then in his early twenties.

The then Minister of Health Rt. Hon. James Young (1931-1935) opened a new administration block at that time. Many of the people there were not able to be invited to hear the Ministers opening speech, so George had his own remedy for that. He modified his amateur radio band transmitter to operate in a medium wave broadcast band which people could tune in to on a normal domestic radio. He fixed a microphone onto the podium where the Minister made his speech. This was of course illegal!  The ironic thing was that the Minister was also the Minister of Broadcasting!

George was one of the founding members of the museum and he remained actively involved until shortly before his death in 2008.