Shortwave Listening, abbreviated as SWL, is a fascinating hobby that opens a window, allowing us to connect with voices from around the world. But what exactly is SWL? What bands does it encompass? And what can one hear? Let’s delve in.
What is SWL?
SWL stands for “Shortwave Listening.” It refers to the hobby of tuning into shortwave radio broadcasts. Unlike amateur radio operators, often referred to as “hams,” shortwave listeners focus on listening without transmitting signals. It’s a captivating pastime that offers a connection to various parts of the globe, especially appealing to those intrigued by international cultures and news.
Frequency & Band
- Frequency: Think of it as the “house number,” typically represented in kHz or MHz. For instance, 3850kHz is equivalent to 3.850MHz.
- Band: It’s akin to the “street,” usually denoted in meters.
Shortwave broadcast bands are specifically designed for international broadcasting. For example, the 120-meter band ranges from 2.3 MHz to 2.495 MHz. Apart from shortwave, there are also Medium Wave (MW) and Long Wave (LW). For instance, MW spans from 530 kHz to 1700 kHz, while LW ranges from 30 kHz to 300 kHz.
Modes
- AM: Used for Long Wave, Medium Wave, and Shortwave broadcasting.
- SSB: Commonly employed by hams and many utility stations, including LSB, USB, and BFO.
- DRM: Utilized by a select few shortwave broadcasters, offering high-quality audio.
- Digital Modes: Such as WEFAX, RTTY, and more.
What Can You Tune Into?
- International broadcasts
- Ham radio communications
- Time signal stations like WWV and CHU
- Utility stations
Time & Listening
The universally accepted time is UTC, also known as Zulu or GMT, unaffected by Daylight Saving Time. You can check the current UTC time via this link. Generally, nighttime offers the best listening experience since the D-layer of the ionosphere absorbs signals during the day, especially affecting Long Wave, Medium Wave, and the lower frequencies of Shortwave.
Recommended Websites
- SWLing: An introduction to shortwave listening and reviews of various shortwave radios.
- Shortwave Schedule: Lists all shortwave broadcasters globally.
- Kiwisdr: Listen to signals from other countries online.
Shortwave Listening is a world filled with wonder and exploration. Whether you’re a novice or a seasoned enthusiast, there’s endless joy to be found in this realm. Hopefully, this article serves as a beacon on your shortwave journey!