FAQ
Common questions
Do I need a license to listen to shortwave radio?
No license whatsoever. Receiving is completely legal and unrestricted everywhere in the world. You only need a license if you transmit — that's ham radio and a completely different hobby. SWLing is 100% listen-only, with no paperwork, no exam, no registration.
What can I actually hear on shortwave?
International broadcasters (BBC World Service, Radio Havana Cuba, Voice of Korea, China Radio International), ham radio operators in conversation, numbers stations (mysterious encrypted broadcasts), utility stations including maritime weather and air-to-ground communications, time signal stations like WWV at 5/10/15/20 MHz, and digital signals you can decode into weather maps and text.
SDR dongle or dedicated portable — which should I buy first?
If you have a laptop and you like tinkering with software, the RTL-SDR Blog V4 ($35) is the better value — more flexible, wider frequency coverage, huge tutorial library. If you want something self-contained that you can use on a porch without a computer, the Tecsun PL-880 is worth the extra $100.
Can I listen indoors with a small antenna?
Yes, with trade-offs. Indoor antennas pick up electrical interference from LED bulbs, switching power supplies, and USB chargers. A passive loop like the Kaito AN-100 resists that noise well. Even so, a wire running outside — even taped along a window frame outside — will consistently outperform an indoor antenna.
What software do I use with the RTL-SDR?
SDR# (SDRSharp) on Windows is the standard — free, actively maintained, with the most tutorials written for it. GQRX is the Mac/Linux equivalent. SDR++ is a newer cross-platform option with a cleaner interface. All three are free and work with RTL-SDR hardware out of the box.
What's the best time of day to listen?
Evening (local time, roughly 6 PM to midnight) is when most shortwave bands are most active. The nightside ionosphere bounces signals from other continents to your antenna efficiently. Early morning before sunrise is also productive. Midday is generally the weakest time for intercontinental reception.