PSSAQ / SAQ
About SAQ — Grimeton Radio Station, Varberg
A signal at 17.2 kHz from Sweden: radio history kept alive through an operational transmitter.
A radio station preserved as World Heritage
Grimeton Radio Station stands near Varberg in southern Sweden. Built in 1922–1924 for transatlantic wireless communication, it became a UNESCO World Heritage Site in 2004. The historic transmitter and antenna system, including six 127-metre steel towers, have been preserved.
SAQ and the Alexanderson alternator
SAQ is the call sign of this historic transmitter. Its Alexanderson alternator installation has been maintained in operating condition. The attraction is more than a display of old equipment: the station continues to bring radio history to life by transmitting signals.
Listening to Morse at 17.2 kHz
SAQ sends VLF Morse (CW) at 17.2 kHz during special transmissions. It is not a continuous service. Check the Alexander association’s official announcements for planned transmissions, which may be cancelled at short notice. Take care to distinguish UTC from local time.
Exploring reception with PSSAQ
PSSAQ was made to visualize, monitor and record signals near 17.2 kHz from a receiver. First check the frequency response of your receiver and audio input, then look for the signal. Experimental CW decoding is an aid; compare its results with the recording and what you hear.
See the setup guide →Official information & references
- UNESCO: Grimeton Radio Station, Varberg ↗
- Grimeton Radio Station: About the World Heritage ↗
- Alexander association: SAQ transmissions and activities ↗
Sources checked: 2026-10-25. Consult the official announcement for each transmission for current times and reception-report instructions.
Contact
For operation reports or suggestions, include your version and connection setup.