Long wave radio message from Grimeton will be sent by morse code.On December 1st 1924, the 200kW Alexanderson alternator with the call sign "SAQ" was put into commercial operation with telegram traffic from Sweden to the United States. 101 years later, the transmitter is the only remaining electro-mechanical transmitter from this era and is still in running condition. On Christmas Eve morning, Wednesday December 24th 2025, the transmitter is scheduled* to spread the traditional Christmas message to the whole World, on 17.2 kHz CW.
The SAQ morse key that will be used to deliver a Christmas Eve message to the World on Dec 24th.
Program and transmission schedule:
07:00 CET (06:00 UTC): The visitor center is opened for visitors with coffee, Christmas buns and ginger snaps.
08:00 CET (07:00 UTC): The transmitter hall at World Heritage Grimeton is opened for visitors.
Transmission & YouTube Live stream:
08:20 CET (07:20 UTC): Live stream on YouTube begins.
08:30 CET (07:30 UTC): Startup and tuning of the Alexanderson Alternator SAQ.
09:00 CET (08:00 UTC): Transmission of a Christmas message from SAQ.
08:00 CET (07:00 UTC): The transmitter hall at World Heritage Grimeton is opened for visitors.
The transmission event can be seen live on our YouTube Channel or by following the link below. Link to livestream: https://www.youtube.com/watch?v=uSGQ0zR188Q
The Grimeton World Heritage Site, dating from 1924, is the only remaining radio station of its kind, showing what wireless technology looked like in its infancy, but also what it has meant for us humans in technical terms. In 2004, Grimeton Radio Station was added to UNESCO's World Heritage List of unique natural and cultural heritage sites worthy of preservation for the future. www.grimeton.org
In 2025, Grimeton Radio Station celebrate its 100th anniversary.
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