𝗦𝗔𝗤 𝘀𝗰𝗵𝗲𝗱𝘂𝗹𝗲𝗱 𝘁𝗼 𝘀𝗲𝗻𝗱 𝗮 𝗖𝗵𝗿𝗶𝘀𝘁𝗺𝗮𝘀 𝗺𝗲𝘀𝘀𝗮𝗴𝗲 𝗼𝗻 𝗗𝗲𝗰 𝟮𝟰𝘁𝗵 𝟮𝟬𝟮𝟱.
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.
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.
Test Transmissions
We are planning to carry our some test transmissions on Friday, December 19th, 13:00 – 16:00 CET (12:00 -15:00 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.
https://mailchi.mp/03fad3ce98b2/alexanderson-day-11042782