{"id":65186,"date":"2026-01-17T08:55:08","date_gmt":"2026-01-17T12:55:08","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=65186"},"modified":"2026-01-18T08:15:03","modified_gmt":"2026-01-18T12:15:03","slug":"can-you-help-carlos-id-this-cw-signal-on-8207-khz","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2026\/01\/can-you-help-carlos-id-this-cw-signal-on-8207-khz\/","title":{"rendered":"Can you help Carlos ID this CW signal on 8207 kHz?"},"content":{"rendered":"<p><strong>Many thanks to <em>SWLing Post<\/em> contributor Carlos Latuff, who writes:<\/strong><\/p>\n<p style=\"padding-left: 40px;\">Dear Thomas, I was doing my morning radio listening on the Gua\u00edba waterfront in Porto Alegre, Brazil, when I came across this Morse code signal at 8207 kHz by pure chance. I tried to decode it using apps but didn&#8217;t get good results. As I&#8217;m not good at CW, I&#8217;m leaving the audio here so that your qualified and attentive audience can, perhaps, discover what this transmission is about. Thank you very much for your attention.<\/p>\n<p><iframe loading=\"lazy\" title=\"UNID CW on 8207 kHz\" width=\"528\" height=\"938\" src=\"https:\/\/www.youtube.com\/embed\/tlPzPMqY5_Q?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><strong>Update from Carlos:<\/strong><\/p>\n<p style=\"padding-left: 40px;\">I contacted Ary Boender, a Dutch shortwave listener and specialist in HF utility radio communications. He said:<\/p>\n<p style=\"padding-left: 80px;\"><em><strong>&#8220;The recording starts with HR SVC GA NA25\/XE56\/ 0. You heard a Chinese military station. &#8220;HR SVC GA&#8221; is typical for the Chinese military&#8221;.<\/strong><\/em><\/p>\n<p style=\"padding-left: 40px;\">Mystery solved!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor Carlos Latuff, who writes: Dear Thomas, I was doing my morning radio listening on the Gua\u00edba waterfront in Porto Alegre, Brazil, when I came across this Morse code signal at 8207 kHz by pure chance. I tried to decode it using apps but didn&#8217;t get good results. As I&#8217;m [&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],"tags":[90,5448],"class_list":["post-65186","post","type-post","status-publish","format-standard","hentry","category-news","tag-cw","tag-mystery-signals"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-gXo","jetpack-related-posts":[{"id":49146,"url":"https:\/\/swling.com\/blog\/2021\/06\/carlos-seeks-clarity-about-another-cw-station\/","url_meta":{"origin":65186,"position":0},"title":"Carlos seeks clarity about another CW station","author":"Thomas","date":"June 6, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Carlos Latuff, who writes: Today (June 5, 2021) I heard another mysterious CW transmission here in Rio Grande do Sul coast, this time on 8779 kHz, 18h31 UTC. I did some research and this frequency is related to Rome Radio (which is no longer\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\/2018\/03\/XHDATA-D-808-Left-Side.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/XHDATA-D-808-Left-Side.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/XHDATA-D-808-Left-Side.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/03\/XHDATA-D-808-Left-Side.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":61193,"url":"https:\/\/swling.com\/blog\/2024\/11\/carlos-illustrated-radio-listening-report-and-recording-of-the-russian-navy-in-cw-november-23-2024\/","url_meta":{"origin":65186,"position":1},"title":"Carlos\u2019 Illustrated Radio Listening Report and Recording of the Russian Navy in CW (November 23, 2024)","author":"Thomas","date":"November 24, 2024","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor and noted political cartoonist,\u00a0Carlos Latuff, who shares\u00a0illustrated radio listening report of a recent transmission from the Russian Navy in Morse Code. Carlos notes: Part of CW (Morse) message from Russian Navy Black Sea Fleet in Sevastopol, frequency of 17615 kHz, listened in Florianopolis, Brazil, distance of\u2026","rel":"","context":"In &quot;Art&quot;","block_context":{"text":"Art","link":"https:\/\/swling.com\/blog\/category\/art-2\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/11\/Latuff-Russian-Navy-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/11\/Latuff-Russian-Navy-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/11\/Latuff-Russian-Navy-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/11\/Latuff-Russian-Navy-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/11\/Latuff-Russian-Navy-1.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":49136,"url":"https:\/\/swling.com\/blog\/2021\/06\/can-you-help-carlos-identify-this-cw-station\/","url_meta":{"origin":65186,"position":2},"title":"Can you help Carlos identify this CW station?","author":"Thomas","date":"June 4, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Carlos Latuff, who writes: Hey Tom, Check out this recording. I heard it today on 16976 kHz USB, at 13h08 UTC, here in Tramandai coast, Rio Grande do Sul, Brazil. Maybe your readers may have an idea what is this CW about? Thank you\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\/2018\/01\/XHDATA-d-808-keypad-closeup-radio-dial-e1515698257533.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/XHDATA-d-808-keypad-closeup-radio-dial-e1515698257533.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/XHDATA-d-808-keypad-closeup-radio-dial-e1515698257533.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/XHDATA-d-808-keypad-closeup-radio-dial-e1515698257533.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":65683,"url":"https:\/\/swling.com\/blog\/2026\/03\/a-mystery-signal-and-a-fast-answer-from-udxf\/","url_meta":{"origin":65186,"position":3},"title":"A Mystery Signal and a Fast Answer from UDXF","author":"Thomas","date":"March 27, 2026","format":false,"excerpt":"Many thanks to SWLing Post contributor Dan Greenall, who write:\u00a0 Hi Thomas I still have a tendency to scan the utility frequencies from time to time, much as I did over 50 years ago. Now, though, I can listen in through the various Kiwi SDR receivers scattered around the globe.\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\/2026\/03\/China-military-radio.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":64980,"url":"https:\/\/swling.com\/blog\/2025\/12\/bobs-radio-corner-industrial-scientific-and-medical-ism-bands\/","url_meta":{"origin":65186,"position":4},"title":"Bob&#8217;s Radio Corner: Industrial, Scientific, and Medical (ISM) Bands","author":"Thomas","date":"December 21, 2025","format":false,"excerpt":"Industrial, Scientific, and Medical (ISM) Bands Noted by Bob Colegrove This is not the sort of thing you might consider typical DX.\u00a0 One reporter traced a signal like the one I describe here to the innocuous utility box at the corner of his lot.\u00a0 No, it is not noise.\u00a0 It\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\/2025\/12\/Fig-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":39927,"url":"https:\/\/swling.com\/blog\/2019\/09\/carlos-questions-possible-radio-denge-welat-jamming\/","url_meta":{"origin":65186,"position":5},"title":"Carlos questions possible Radio Denge Welat jamming","author":"Thomas","date":"September 29, 2019","format":false,"excerpt":"Many thanks to SWLing Post contributor, Carlos Latuff, who writes: Greetings from Porto Alegre, Brazil. Yesterday I listened something unusual. On the shortwave band of 11.520 kHz, 11.525 kHz and then 11.530 kHz, this last the frequency of Kurdish Radio Denge Welat, it was broadcasting military songs from the times\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\/2019\/09\/11530-kHz-1024x574.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/09\/11530-kHz-1024x574.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/09\/11530-kHz-1024x574.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/65186","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=65186"}],"version-history":[{"count":2,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/65186\/revisions"}],"predecessor-version":[{"id":65202,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/65186\/revisions\/65202"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=65186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=65186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=65186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}