{"id":7051,"date":"2013-08-15T07:45:00","date_gmt":"2013-08-15T11:45:00","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=7051"},"modified":"2013-08-15T07:45:00","modified_gmt":"2013-08-15T11:45:00","slug":"1944-chart-of-electromagnetic-radiations","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2013\/08\/1944-chart-of-electromagnetic-radiations\/","title":{"rendered":"1944 “Chart of Electromagnetic Radiations”"},"content":{"rendered":"

Hat tip to Dennis Walter for sending me a link to this beautiful circa 1944 “Chart of Electromagnetic Radiations” by\u00a0W.M Welch Scientific Company. According to Flickr user\u00a0llnl photos<\/a>, it was found, “tucked away in the back of an unused office years ago, but now hangs framed in a high-traffic hallway populated by Lawrence Livermore engineers.”<\/p>\n

\"ChartOfElectromagneticRadiation\"<\/a><\/p>\n

Being a big fan of vintage maps and technical illustrations, I would love to dedicate a wall of my radio room to this chart.<\/p>\n

Click on the photo above to enlarge this image to\u00a01600 \u00d7 1113.<\/p>\n

You can download the original, high resolution image by visiting llnl photos’ Flickr page<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Hat tip to Dennis Walter for sending me a link to this beautiful circa 1944 “Chart of Electromagnetic Radiations” by\u00a0W.M Welch Scientific Company. According to Flickr user\u00a0llnl photos, it was found, “tucked away in the back of an unused office years ago, but now hangs framed in a high-traffic hallway populated by Lawrence Livermore engineers.” […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","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":[508,305,43],"tags":[36,2083,4094],"class_list":["post-7051","post","type-post","status-publish","format-standard","hentry","category-art-2","category-nostalgia","category-shortwave-radio","tag-art","tag-chart-of-electromagnetic-radiations","tag-nostalgia"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-1PJ","jetpack-related-posts":[{"id":51812,"url":"https:\/\/swling.com\/blog\/2022\/02\/guest-post-control-of-electromagnetic-radiation-conelrad\/","url_meta":{"origin":7051,"position":0},"title":"Guest Post: Control of Electromagnetic Radiation (CONELRAD)","author":"Thomas","date":"February 8, 2022","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Bob Colegrove, who shares the following guest post: Control of Electromagnetic Radiation (CONELRAD) As recalled by Bob Colegrove In his comment on my recent posting, Tinkering with History, Mario noted the dial on the featured radio, the General Electric P755A, sported two small triangles, one\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/02\/Fig-1-e1644317508418.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/02\/Fig-1-e1644317508418.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/02\/Fig-1-e1644317508418.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/02\/Fig-1-e1644317508418.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/02\/Fig-1-e1644317508418.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":2832,"url":"https:\/\/swling.com\/blog\/2012\/02\/google-doodle-honors-heinrich-hertzs-155th-birthday\/","url_meta":{"origin":7051,"position":1},"title":"Google Doodle honors Heinrich Hertz’s 155th birthday","author":"Thomas","date":"February 22, 2012","format":false,"excerpt":"If you visit Google's home page today, you'll notice that their typical logo has been replaced with an animation of an undulating, multi-colored wave. If you click on the wave, you'll be taken to sites telling the story of Heinrich Rudolf Hertz. We should all take a moment today to\u2026","rel":"","context":"In "News"","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\/2012\/02\/HertzScreenCapturGoogle.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2012\/02\/HertzScreenCapturGoogle.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2012\/02\/HertzScreenCapturGoogle.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":2269,"url":"https:\/\/swling.com\/blog\/2011\/11\/11-gb-of-digital-pirate-radio-recordings\/","url_meta":{"origin":7051,"position":2},"title":"11 GB+ of digital pirate radio recordings","author":"Thomas","date":"November 26, 2011","format":false,"excerpt":"(Source: TextFiles.com via Radio Survivor) Since the 1990s, a fellow named Sealord has been recording pirate radio broadcasts coming across shortwave bands. Without authorization, license, or any sort of oversight, all manner of folks have been broadcasting illegal but probably not overly immoral shows out into the air. This collection,\u2026","rel":"","context":"In "Nostalgia"","block_context":{"text":"Nostalgia","link":"https:\/\/swling.com\/blog\/category\/nostalgia\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2011\/11\/ArchiveDotorg.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":23033,"url":"https:\/\/swling.com\/blog\/2016\/12\/mechanically-based-antenna-underwater-and-underground-radio\/","url_meta":{"origin":7051,"position":3},"title":"Mechanically Based Antenna: Underwater and underground radio","author":"Thomas","date":"December 24, 2016","format":false,"excerpt":"(Source: Space Daily) The Mechanically Based Antenna (AMEBA) program could enable radio communication through seawater and the ground. and directly between warfighters hundreds and ultimately thousands of kilometers apart. Here's something easy to forget when you are chatting on your cell phone or flipping channels on your smart TV: although\u2026","rel":"","context":"In "Antennas"","block_context":{"text":"Antennas","link":"https:\/\/swling.com\/blog\/category\/antennas\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/UPdateimage_619x316_v3.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/UPdateimage_619x316_v3.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/UPdateimage_619x316_v3.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":1484,"url":"https:\/\/swling.com\/blog\/2011\/08\/radius-shortwave-inspired-audio-art\/","url_meta":{"origin":7051,"position":4},"title":"Radius – Shortwave inspired audio art","author":"Thomas","date":"August 12, 2011","format":false,"excerpt":"I have a particular fondness for artists who use shortwave radio to inspire their work, so you can imagine how pleased I was to stumble upon\u00a0Radius--an experimental radio broadcast platform based in Chicago, IL, USA. In their own words: Radius features a new project semi-monthly with statements by artists who\u2026","rel":"","context":"In "Art"","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\/2011\/08\/radiuslogo.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":55390,"url":"https:\/\/swling.com\/blog\/2023\/01\/radio-waves-binghamton-wireless-landmark-broadcast-intrusions-licwc-on-the-bbc-and-blocking-radio-waves\/","url_meta":{"origin":7051,"position":5},"title":"Radio Waves: Binghamton Wireless Landmark, Broadcast Intrusions, LICWC on the BBC, and Blocking Radio Waves","author":"Thomas","date":"January 19, 2023","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a collection of links to interesting stories making waves in the world of radio.\u00a0Enjoy! Many thanks to SWLing Post contributors Dennis Dura (K2DCD), Ulis (K3LU), Blake (K8LSU) for the following tips: Radio history was\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/JRC-Dial.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/JRC-Dial.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/JRC-Dial.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/JRC-Dial.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/7051","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=7051"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/7051\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=7051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=7051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=7051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}