{"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_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},"jetpack_post_was_ever_published":false},"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":1420,"url":"https:\/\/swling.com\/blog\/2011\/07\/silicon-labs-si4734-dsp-shortwave-radios\/","url_meta":{"origin":18747,"position":5},"title":"Silicon Labs Si4734 DSP-based shortwave radios","author":"Thomas","date":"July 23, 2011","format":false,"excerpt":"I have gone through our Shortwave Radio Index (SWRI) and tagged every portable radio that is based on the Silicon Labs Si4734 DSP chipset. The Si4734 has been one of the biggest innovations to happen to portable receivers in recent years. When implemented well into a receiver design, the Si4734\u2026","rel":"","context":"In &quot;Radios&quot;","block_context":{"text":"Radios","link":"https:\/\/swling.com\/blog\/category\/radios\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2011\/07\/SI4735-circuits-300x194.jpg?resize=350%2C200","width":350,"height":200},"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}]}}