{"id":63267,"date":"2025-06-22T07:07:15","date_gmt":"2025-06-22T11:07:15","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=63267"},"modified":"2025-06-22T07:07:15","modified_gmt":"2025-06-22T11:07:15","slug":"saq-at-100-celebrating-a-century-of-global-vlf-communication","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2025\/06\/saq-at-100-celebrating-a-century-of-global-vlf-communication\/","title":{"rendered":"SAQ at 100: Celebrating a Century of Global VLF Communication"},"content":{"rendered":"<div id=\"attachment_63268\" style=\"width: 1610px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-63268\" class=\"wp-image-63268 size-full\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h.jpg\" alt=\"\" width=\"1600\" height=\"1200\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h.jpg 1600w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h-300x225.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h-1024x768.jpg 1024w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h-768x576.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h-1536x1152.jpg 1536w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2025\/06\/3216881055_4bdd9d0a5b_h-624x468.jpg 624w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/a><p id=\"caption-attachment-63268\" class=\"wp-caption-text\">Photo: Martin Wallgren<\/p><\/div>\n<p><strong>Many thanks to <em>SWLing Post<\/em> contributor, Paul Jamet, who shares the following news:<\/strong><\/p>\n<h1 style=\"padding-left: 40px;\">Grimeton SAQ turns 100!<\/h1>\n<p style=\"padding-left: 40px;\">On July 2, 2025, the SAQ Grimeton Radio Station in Sweden celebrates its centennial \u2014 a hundred years of quiet transmissions that have bridged continents and eras.<\/p>\n<p style=\"padding-left: 40px;\">Built in 1925, this UNESCO-listed radio station still transmits Morse code using a pre-electronic VLF generator.<\/p>\n<p style=\"padding-left: 40px;\">A silent voice of peace across the globe.<\/p>\n<p style=\"padding-left: 40px;\"><strong>SAQ to air at 100th anniversary on July 2nd 2025:<\/strong> <a href=\"https:\/\/alexander.n.se\/en\/celebrate-100-years-with-saq-grimeton\/\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">https:\/\/alexander.n.se\/en\/celebrate-100-years-with-saq-grimeton\/<\/a><\/p>\n<p style=\"text-indent: 0px; margin: 0px; padding-left: 40px;\"><strong>English program:<\/strong> <a href=\"https:\/\/alexander.n.se\/wp-content\/uploads\/2025\/06\/Jubileumsdagen_Grimeton100_en.pdf\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">https:\/\/alexander.n.se\/wp-content\/uploads\/2025\/06\/Jubileumsdagen_Grimeton100_en.pdf<\/a><\/p>\n<p>&nbsp;<\/p>\n<p style=\"padding-left: 40px;\"><strong>SAQ transmits telegrams worldwide\u00a0on 17,2 kHz at 11.00 CEST (09.00 UTC) and 15.00 CEST (13.00 UTC). The\u00a0startups begin at 10.30 CEST (08.30 UTC)\u00a0and 14.30 CEST (12.30 UTC).<\/strong><\/p>\n<h3 style=\"padding-left: 40px;\">Learn more:<\/h3>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul style=\"-qt-list-indent: 1; margin: 0px;\">\n<li><a href=\"https:\/\/grimeton.org\/en\/100-years-of-communication\/\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">Grimeton.org \u2013 100 Years of Communication<\/a><\/li>\n<li><a href=\"https:\/\/whc.unesco.org\/en\/list\/1134\/\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">UNESCO World Heritage page<\/a><\/li>\n<li><a href=\"https:\/\/www.unesco.org\/en\/articles\/station-radio-grimeton-varberg-sweden\" target=\"_blank\" rel=\"noreferrer nofollow noopener\">UNESCO article on SAQ<\/a><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor, Paul Jamet, who shares the following news: Grimeton SAQ turns 100! On July 2, 2025, the SAQ Grimeton Radio Station in Sweden celebrates its centennial \u2014 a hundred years of quiet transmissions that have bridged continents and eras. Built in 1925, this UNESCO-listed radio station still transmits Morse code [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3,305,288,3485],"tags":[3487,9691,1416,9860],"class_list":["post-63267","post","type-post","status-publish","format-standard","hentry","category-news","category-nostalgia","category-radio-history","category-vlf","tag-grimeton-radio","tag-paul-jamet","tag-radio-grimeton-saq","tag-saq"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-gsr","jetpack-related-posts":[{"id":19835,"url":"https:\/\/swling.com\/blog\/2016\/07\/grimeton-radio-saq-transmission-on-july-3rd\/","url_meta":{"origin":63267,"position":0},"title":"Grimeton Radio \/ SAQ Transmission on July 3rd","author":"Thomas","date":"July 1, 2016","format":false,"excerpt":"(Source: The Alexander Association) Reminder of Grimeton Radio \/ SAQ Transmission The annual transmission \u201cAlexanderson Day\u201d with the Alexanderson alternator on VLF\u00a017.2 kHz with the call SAQ will take place Sunday, July 3rd, 2016 at 09:00 UTC (tuning up\u00a0from after 08:30 UTC) and will be repeated at 12:00 UTC (tuning\u2026","rel":"","context":"In &quot;Current Events&quot;","block_context":{"text":"Current Events","link":"https:\/\/swling.com\/blog\/category\/current-events\/"},"img":{"alt_text":"Alexanderson alternator in the SAQ Grimeton VLF transmitter.","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2012\/10\/SAQ%2Bsandare_svartvitt.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":43813,"url":"https:\/\/swling.com\/blog\/2020\/06\/grimeton-radio-saq-transmission-on-sunday-july-5-2020\/","url_meta":{"origin":63267,"position":1},"title":"Grimeton Radio \/ SAQ Transmission on Sunday, July 5, 2020","author":"Thomas","date":"June 10, 2020","format":false,"excerpt":"(Source: SAQ via Mike Terry) The annual transmission on Alexanderson Day with the Alexanderson Alternator on VLF 17.2 kHz with the call sign SAQ will take place Sunday, July 5th, 2020. Two transmissions are scheduled as follows: Startup and tuning at 10:30 (08:30 UTC) with a transmission of a message\u2026","rel":"","context":"In &quot;Longwave&quot;","block_context":{"text":"Longwave","link":"https:\/\/swling.com\/blog\/category\/longwave\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/450px-grimeton_vlf_mast_row1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":32812,"url":"https:\/\/swling.com\/blog\/2018\/06\/grimeton-radio-saq-transmission-on-july-1st-2018\/","url_meta":{"origin":63267,"position":2},"title":"Grimeton Radio \/ SAQ Transmission on July 1st, 2018","author":"Thomas","date":"June 14, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Evandro Stanger, who writes: Good news. Grimeton Radio will be on air again on July, 1. See the link below: (Source: The Alexander Association) Grimeton Radio \/ SAQ Transmission on July 1st, 2018. The annual transmission on \u201cAlexanderson Day\u201d with the Alexanderson alternator on VLF\u00a017.2\u2026","rel":"","context":"In &quot;Current Events&quot;","block_context":{"text":"Current Events","link":"https:\/\/swling.com\/blog\/category\/current-events\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/450px-grimeton_vlf_mast_row1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":49488,"url":"https:\/\/swling.com\/blog\/2021\/07\/live-video-of-startup-tuning-and-transmitting-from-alexanderson-alternator-saq\/","url_meta":{"origin":63267,"position":3},"title":"Live video of startup, tuning, and transmitting from Alexanderson Alternator SAQ","author":"Thomas","date":"July 4, 2021","format":false,"excerpt":"Hats off to the crew at the UNESCO World Heritage Grimeton Radio Station! Today is Sunday July 4, 2021. Besides being Independence Day here in the States, it's also Alexanderson Day in Sweden! This morning, I discovered a video on the Grimeton Station YouTube channel: a recording of their live\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/450px-grimeton_vlf_mast_row1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":16141,"url":"https:\/\/swling.com\/blog\/2015\/12\/grimeton-vlf-broadcast-on-christmas-eve-2015\/","url_meta":{"origin":63267,"position":4},"title":"Grimeton VLF broadcast on Christmas Eve 2015","author":"Thomas","date":"December 13, 2015","format":false,"excerpt":"(Source: Southgate ARC) It is now 10 years since our first Christmas Eve transmissions started. There will be, as earlier, a transmission with the Alexanderson alternator on VLF 17.2 kHz CW from Grimeton Radio\/SAQ in the very early morning on Christmas Eve, Thursday, December 24th 2015 . A message will\u2026","rel":"","context":"In &quot;News&quot;","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"450px-grimeton_vlf_mast_row1","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/450px-grimeton_vlf_mast_row1-225x300.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":38241,"url":"https:\/\/swling.com\/blog\/2019\/06\/grimeton-radio-saq-transmission-on-june-30th-2019\/","url_meta":{"origin":63267,"position":5},"title":"Grimeton Radio \/ SAQ Transmission on June 30th, 2019","author":"Thomas","date":"June 27, 2019","format":false,"excerpt":"(Source: The Alexander Association via Mike Hansgen) Grimeton Radio \/ SAQ Transmission on June 30th, 2019. The annual transmission on \u201cAlexanderson Day\u201d with the Alexanderson alternator on VLF 17.2 kHz with the call SAQ will take place Sunday, June 30th, 2019. Two transmissions are scheduled as follows: Startup of tuning\u2026","rel":"","context":"In &quot;Longwave&quot;","block_context":{"text":"Longwave","link":"https:\/\/swling.com\/blog\/category\/longwave\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2009\/11\/450px-grimeton_vlf_mast_row1.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/63267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=63267"}],"version-history":[{"count":1,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/63267\/revisions"}],"predecessor-version":[{"id":63269,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/63267\/revisions\/63269"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=63267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=63267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=63267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}