Swl - Short Wave Listening PA 9073
Radio did not begin as the advanced broadcasting medium we know today. In its early days, radio was mainly used by small experimental and amateur stations. People built and operated transmitters and sent signals through the air. But transmitting would have had little meaning without people who were able to receive and listen to those signals.
Listening to radio probably became a hobby almost from the very beginning of radio itself. There were radio stations transmitting signals, and there were people listening to these broadcasts at home, at work, during their free time, and even in busy factories or quiet offices. Some people listened simply for entertainment, while others became interested in the technology, the information being transmitted, or the challenge of receiving distant and unusual stations.
Today, radio listeners can be divided into several groups depending on the type of signals they receive. In general, radio listening can be either a hobby or a professional activity.
This article focuses mainly on radio listening as a hobby. Some of the main groups of listeners include:
- listeners to broadcasting stations on long wave, medium wave, shortwave, VHF, and UHF;
- listeners to special radio services, such as signals from satellites, ships, aviation stations, emergency services, and other communication stations;
- listeners to amateur radio stations who monitor conversations between radio amateurs on the allocated amateur radio bands. This can also include amateur television and communication on VHF and UHF frequencies.
This is a very broad subject, and describing every aspect of the hobby and every type of listener would take a great deal of time. In this article, I will mainly focus on Shortwave Listeners (SWL) who listen to amateur radio communications.
The SWL Call Sign
In the past, many national radio and telecommunications authorities issued special identification numbers or call signs to radio listeners. These SWL call signs usually looked different from the official call signs used by licensed transmitting radio amateurs.
An SWL call sign can consist of a prefix, a number, and sometimes an additional suffix or identifier. The prefix may indicate the country or region where the listener is located. The number is usually a unique identification issued by an organization or radio club. In some cases, an additional abbreviation may indicate membership in a particular listening or amateur radio organization.
An SWL call sign makes it easier for a listener to be identified, especially when exchanging reception reports and confirmation cards.
Today, many official telecommunications authorities no longer issue separate listener identification numbers. As a result, various national and international radio clubs and SWL organizations issue their own SWL identification numbers or call signs.
Licensed amateur radio operators may also be interested in SWL. Sometimes a radio amateur hears an interesting or rare station but is unable to establish direct radio contact with it. In that case, the operator can simply become a listener and record the station as an SWL reception.
Why Do You Need an SWL Identification?
Of course, you can listen to the radio without any identification at all. For many people, listening itself is already an enjoyable and interesting hobby.
However, an important traditional part of the SWL hobby is sending reception reports and collecting QSL cards.
With a reception report, the listener informs a radio station or amateur radio operator that their transmission was received at a particular time and on a particular frequency.
A reception report usually contains information such as:
- the date and time of reception;
- the frequency or amateur radio band used;
- the call sign of the station received;
- information about signal strength and readability;
- optionally, details about the receiver and antenna used.
If the reception report contains enough accurate information, the station may confirm the reception by sending a QSL card. Many QSL cards are specially designed and contain photographs, artwork, or information about the station, operator, or location. Because of this, they are often valued as collectible items by radio amateurs and SWL enthusiasts.
Having your own SWL call sign or identification number is useful because it provides a simple and unique way to identify yourself.
What Do You Need to Start SWL?
The first thing you need is a suitable radio receiver.
A dedicated shortwave communications receiver is ideal, but these receivers can sometimes be expensive. Beginners can also use more affordable portable receivers.
If you want to listen to amateur radio operators, it is important that the receiver can receive SSB (Single Side Band) signals. This type of modulation is widely used for voice communication on the HF amateur radio bands.
A good antenna is also important. Even a relatively simple wire antenna can significantly improve the reception of shortwave signals.
If you also want to collect QSL cards, you can design your own card or send digital reception reports. An SWL identification is not required, but it can be useful if you regularly send reception reports and communicate with radio amateurs and other shortwave listeners.
Getting Started
To learn more about this hobby, you can search for terms such as SWL, Shortwave Listening, and HAM radio. You will find information about amateur radio bands, frequencies, receivers, antennas, reception reports, and QSL cards.
Shortwave Listening can be a fascinating hobby. It allows you not only to learn more about radio and communication technology, but also to receive signals from stations hundreds or even thousands of kilometres away.
With a suitable receiver, a simple antenna, and a little patience, you can start listening right away.
Happy listening!