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« Tomorrow, Sun, is Alexanderson Day, when Grimeton Radio Station in Sweden fires up its Alexanderson alternator to transmit as SAQ on 17.2kHz VLF. This is last surviving high frequency alternator CW transmitter from pre-electronic transmitter era: http://rsgb.org/main/blog/news/gb2rs/headlines/2018/06/29/saq-transmits-today/ #hamr »
— Retweet https://twitter.com/theRSGB/status/1013028123120566273
