{"id":18747,"date":"2016-05-09T18:28:50","date_gmt":"2016-05-09T22:28:50","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=18747"},"modified":"2016-05-09T18:28:50","modified_gmt":"2016-05-09T22:28:50","slug":"sigsaly-and-the-unlikely-history-of-the-bell-labs-voder","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2016\/05\/sigsaly-and-the-unlikely-history-of-the-bell-labs-voder\/","title":{"rendered":"SIGSALY and the unlikely history of the Bell Labs Voder"},"content":{"rendered":"<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/SIGSALY.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-18748\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/SIGSALY.jpg\" alt=\"SIGSALY\" width=\"640\" height=\"480\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/SIGSALY.jpg 640w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/SIGSALY-300x225.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/SIGSALY-400x300.jpg 400w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><\/a><\/p>\n<p>One of my favorite podcasts, <a href=\"http:\/\/99percentinvisible.org\/episode\/vox-ex-machina\/\" target=\"_blank\">99% Invisible<\/a>, recently featured a story on the Bell Labs&#8217; Voder and how its innovation lead to one of the best kept secrets in WWII high frequency communications: SIGSALY.<\/p>\n<p>The episode is called <strong><a href=\"http:\/\/99percentinvisible.org\/episode\/vox-ex-machina\/\" target=\"_blank\">Vox Ex Machina<\/a><\/strong> and, <strong><em>trust me<\/em><\/strong>,<strong> it&#8217;s a gem<\/strong>.<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/w.soundcloud.com\/player\/?url=https%3A\/\/api.soundcloud.com\/tracks\/258727485&amp;auto_play=false&amp;hide_related=false&amp;show_comments=true&amp;show_user=true&amp;show_reposts=false&amp;visual=true\" width=\"100%\" height=\"400\" frameborder=\"no\" scrolling=\"no\"><\/iframe><\/p>\n<p>Stop whatever you&#8217;re doing today and listen to this brilliant little documentary.<\/p>\n<p>I&#8217;ve embedded the <a href=\"https:\/\/soundcloud.com\/roman-mars\/208-vox-ex-machina\" target=\"_blank\">SoundCloud audio<\/a> of the episode above, but you can also listen via the <a href=\"http:\/\/99percentinvisible.org\/episode\/vox-ex-machina\/\" target=\"_blank\">99 Percent Invisible website<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of my favorite podcasts, 99% Invisible, recently featured a story on the Bell Labs&#8217; Voder and how its innovation lead to one of the best kept secrets in WWII high frequency communications: SIGSALY. The episode is called Vox Ex Machina and, trust me, it&#8217;s a gem. Stop whatever you&#8217;re doing today and listen to [&hellip;]<\/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":[3,288,43],"tags":[2435,5050,5048,34,5047,5049,676],"class_list":["post-18747","post","type-post","status-publish","format-standard","hentry","category-news","category-radio-history","category-shortwave-radio","tag-99-invisible","tag-bell-labs","tag-encryption","tag-shortwave","tag-sigsaly","tag-voder","tag-wwii"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-4Sn","jetpack-related-posts":[{"id":52335,"url":"https:\/\/swling.com\/blog\/2022\/04\/the-cooling-radio-station-musa-the-ultimate-ssb-receiving-site\/","url_meta":{"origin":18747,"position":0},"title":"The Cooling Radio Station &#038; MUSA: The Ultimate SSB Receiving Site","author":"Thomas","date":"April 1, 2022","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mark (AE2EA), who shares the following video from the Antique Wireless Association. Here's the video description: Cooling Radio Station was at the UK end of a point-to-point, shortwave signal beamed from Lawrenceville, New Jersey. The site of the station was carefully selected as the\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\/2022\/04\/Ionosphere-Rugby-Shortwave-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/Ionosphere-Rugby-Shortwave-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/Ionosphere-Rugby-Shortwave-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/Ionosphere-Rugby-Shortwave-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/04\/Ionosphere-Rugby-Shortwave-1.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":60308,"url":"https:\/\/swling.com\/blog\/2024\/08\/the-radio-phonics-laboratory\/","url_meta":{"origin":18747,"position":1},"title":"The Radio Phonics Laboratory","author":"Fastradioburst23","date":"August 5, 2024","format":false,"excerpt":"Fastradioburst23 here to let you know about a brand new book from Imaginary Stations contributor Justin Patrick Moore. The Radio Phonics Laboratory: Telecommunications, Speech Synthesis, and the Birth of Electronic Music is a radiocentric look at the origins of electronica. Radioheads will find much to enjoy in the pages 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\/08\/Radio_1024x1024%402x.webp?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/08\/Radio_1024x1024%402x.webp?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/08\/Radio_1024x1024%402x.webp?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/08\/Radio_1024x1024%402x.webp?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/08\/Radio_1024x1024%402x.webp?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/08\/Radio_1024x1024%402x.webp?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":41232,"url":"https:\/\/swling.com\/blog\/2019\/12\/an-enigma-machine-just-fetched-over-106k-at-auction\/","url_meta":{"origin":18747,"position":2},"title":"An Enigma machine just fetched over $106K at auction","author":"Thomas","date":"December 20, 2019","format":false,"excerpt":"(Source: Bloomberg.com) A rare \u201cEnigma\u201d machine, used by Nazi Germany to create military communications code thought to be unbreakable, sold at auction for more than $106,000. The 28.5-pound cipher machine went to an internet buyer on Saturday, according to Heritage Auctions. It comes with operating instructions, a case with an\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\/2017\/03\/Enigma-Machine.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/Enigma-Machine.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/Enigma-Machine.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/03\/Enigma-Machine.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":27798,"url":"https:\/\/swling.com\/blog\/2017\/08\/wwii-radio-truman-and-the-scott-radio-labs-rbo-2\/","url_meta":{"origin":18747,"position":3},"title":"WWII Radio: Truman and the Scott Radio Labs RBO-2","author":"Thomas","date":"August 30, 2017","format":false,"excerpt":"Many thanks to SWLing Post contributor, Kim Elliott, who recently shared the photo above of President Harry S. Truman via @RealTimeWWII. If I'm not mistaken, that is a\u00a0Scott Radio Labs Model RBO-2. I'm guessing that's also the speaker mounted on the wall directly above the receiver. Scott Radio Labs marine\u2026","rel":"","context":"In &quot;Boat Anchors&quot;","block_context":{"text":"Boat Anchors","link":"https:\/\/swling.com\/blog\/category\/boat-anchors-2\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/08\/WWII-Truman-Scott-Marine-Receiver-1024x823.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/08\/WWII-Truman-Scott-Marine-Receiver-1024x823.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/08\/WWII-Truman-Scott-Marine-Receiver-1024x823.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":19245,"url":"https:\/\/swling.com\/blog\/2016\/06\/1953-film-anticipates-the-transistors-impact-on-technology\/","url_meta":{"origin":18747,"position":4},"title":"1953 film anticipates the transistor&#8217;s impact on technology","author":"Thomas","date":"June 2, 2016","format":false,"excerpt":"Many thanks to an\u00a0SWLing Post reader who\u00a0shared this brilliant 1953 documentary\u00a0film about the anticipated impact the transistor could have on technology. Here's the film description from the AT&T YouTube channel: Made between the 1947 invention of the transistor at Bell Labs and the 1956 awarding of the Nobel Prize for\u2026","rel":"","context":"In &quot;Ham Radio&quot;","block_context":{"text":"Ham Radio","link":"https:\/\/swling.com\/blog\/category\/ham-radio\/"},"img":{"alt_text":"TheTransistor-Film","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/TheTransistor-Film.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/TheTransistor-Film.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/05\/TheTransistor-Film.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":54911,"url":"https:\/\/swling.com\/blog\/2022\/12\/radio-waves-bell-labs-horn-antenna-at-risk-tuckerton-tower-the-warsaw-radio-mast-and-end-of-am-car-radio\/","url_meta":{"origin":18747,"position":5},"title":"Radio Waves: Bell Labs Horn Antenna At Risk, Tuckerton Tower, The Warsaw Radio Mast, and End of AM Car Radio?","author":"Thomas","date":"December 6, 2022","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.\u00a0 A special thanks to SWLing Post contributor, Dennis Dura, for these news tips! Enjoy: Historic Bell Labs Horn Antenna At\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"Dial","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/05\/Hamvention-2019-Flea-Market-Photos-11-of-103.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/05\/Hamvention-2019-Flea-Market-Photos-11-of-103.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/05\/Hamvention-2019-Flea-Market-Photos-11-of-103.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/05\/Hamvention-2019-Flea-Market-Photos-11-of-103.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/18747","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=18747"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/18747\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=18747"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=18747"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=18747"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}