On July 2nd, 1925, Grimeton Radio Station was officially inaugurated. The radio traffic did already start on December 1st the year before, but now it was time the official ceremony. The king of Sweden, Gustav V, the inventor of the amazing 200kW Alternator and the massive six tower antenna, Ernst F.W. Alexanderson, as well as the leader of Radio Corporation of America, David Sarnoff was there, together with several other prominent guests. The large and shiny Alexanderson Alternator was put to life and a message to the American president Calvin Coolidge was transmitted to the receiving station at Riverhead, Long Island NY, USA. The american president replied and assessed the new radio installations as crucial for relations between Sweden and the USA.Celebrate SAQ 100 years
Now we welcome all for the 100th Anniversary at Grimeton Radio Station, Sweden, Wednesday 2nd July 2025.
The site is open, free of charge for all visitors with an extensive program all day.
Download Swedish program here.
Download English program here.
Please see grimeton.org for complete visitor's information.
The unique Alexanderson alternator from 1924, with the call sign SAQ, is scheduled for two transmissions over the antenna on VLF 17.2 kHz CW.
To attend one of the transmissions in the transmitter hall, a ticket will be required.
You can book you ticket here already now (recommended).
SAQ transmission schedule
First transmission:
10:20 CEST (08:20 UTC) Live YouTube broadcast begins.
10:30 CEST (08:30 UTC) Start-up of the Alternator.
11:00 CEST (09:00 UTC) Transmission of a message
Live Video Stream from World Heritage Grimeton Radio Station.
Scheduled at 10:20 CET (08:20 UTC) on Jul 2nd, 2025.
Second transmission:
14:20 CEST (12:20 UTC) Live YouTube broadcast begins.
14:30 CEST (12:30 UTC) Start-up of the Alternator.
15:00 CEST (13:00 UTC) Transmission of a message
Live Video Stream from World Heritage Grimeton Radio Station.
Scheduled at 14:20 CET (12:20 UTC) on Jul 2nd, 2025.
Live Video from World Heritage Grimeton Radio Station
The transmission events can be seen live on our YouTube Channel.
Test TransmissionsWe are planning for some test transmissions on Tuesday, July 1st, 13:00 – 16:00 CEST (11:00 -14:00 UTC). SAQ will be on the air shorter periods of time during this interval, when we will be carrying out tuning, tests and measurements. Your comments are welcome to info@alexander.n.se.
QSL Reports to SAQ
Your QSL reports to SAQ are most welcome and much appreciated!
For guaranteed E-QSL from us,
please report using our
ONLINE QSL FORM.
We can not guarantee that reports by Email / mail / bureau will be confirmed.
The online form will be open from July 2nd until July 27th.
Amateur Radio Station SK6SAQ
The Amateur Radio Station with the call “SK6SAQ” will be QRV during the day on the following frequencies:
– 3 517.2 kHz CW
– 7 017.2 kHz CW
– 14 017.2 KHz CW
– 3 755 kHz SSB
– 7 140 kHz SSB
QSL-reports to SK6SAQ (NOT SAQ) are kindly received via:
- Email to info@alexander.n.se
- or via: SM bureau
- or direct by postal mail (link to address here)Two stations will be on the air most of the time.