{"id":36843,"date":"2019-04-07T07:58:15","date_gmt":"2019-04-07T11:58:15","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=36843"},"modified":"2019-04-07T07:58:15","modified_gmt":"2019-04-07T11:58:15","slug":"the-cats-whisker-50-years-of-wireless-design","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2019\/04\/the-cats-whisker-50-years-of-wireless-design\/","title":{"rendered":"The Cat&#8217;s Whisker &#8211; 50 Years of Wireless Design"},"content":{"rendered":"<p><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/50-years-wireless-03-e1554638082427.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-36845\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/50-years-wireless-03-743x1024.jpg\" alt=\"\" width=\"625\" height=\"861\" \/><\/a><\/p>\n<p>Many thanks to <em>SWLing Post<\/em> contributor, Emilio Ruiz, who notes:<\/p>\n<blockquote><p>Searching archive.org found this [compilation] book: <a href=\"https:\/\/archive.org\/details\/TheCatsWhisker-50YearsOfWirelessDesign\" target=\"_blank\" rel=\"noopener noreferrer\">50 Years of Wireless Design (click to view on Archive.org)<\/a><\/p>\n<p style=\"text-align: center;\"><em><a href=\"https:\/\/archive.org\/download\/TheCatsWhisker-50YearsOfWirelessDesign\/Hill-TheCatsWhisker50YearsOfWirelessDesign.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">Click here to download a PDF copy.<\/a><\/em><\/p>\n<p>I hope it will be interesting for you and the readers of the blog.<\/p>\n<p>[The attached] cartoon is very funny&#8230; How eliminate &#8220;the hand<br \/>\ncapacity&#8221;:<\/p><\/blockquote>\n<p><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/50-years-wireless-01-e1554638028103.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-36844\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/50-years-wireless-01-769x1024.jpg\" alt=\"\" width=\"625\" height=\"832\" \/><\/a><\/p>\n<p>Excellent find, Elilio! Thank you for sharing!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor, Emilio Ruiz, who notes: Searching archive.org found this [compilation] book: 50 Years of Wireless Design (click to view on Archive.org) Click here to download a PDF copy. I hope it will be interesting for you and the readers of the blog. [The attached] cartoon is very funny&#8230; How eliminate [&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":[251,627,3,305,43],"tags":[7711,691,4090,7522],"class_list":["post-36843","post","type-post","status-publish","format-standard","hentry","category-books","category-how-to","category-news","category-nostalgia","category-shortwave-radio","tag-50-years-of-wireless-design","tag-archive-org","tag-books","tag-emilio-ruiz"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-9Af","jetpack-related-posts":[{"id":35233,"url":"https:\/\/swling.com\/blog\/2019\/01\/am-receiver-design-with-regards-to-iboc-bandwidth-claims\/","url_meta":{"origin":36843,"position":0},"title":"AM receiver design with regards to IBOC bandwidth claims","author":"Thomas","date":"January 10, 2019","format":false,"excerpt":"Many thanks to SWLing Post contributor, Emilio Ruiz, who writes: Hi Thomas, I'm writing because found this (interesting) analysis about radio components and the impact on radio receiver quality: http:\/\/www.geocities.ws\/shreddermanrulz\/myth1.htm I think may be are interesting topic for readers of the SWLing Post. This is interesting, Emilio.\u00a0 Thank you for\u2026","rel":"","context":"In &quot;AM&quot;","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\/2018\/01\/XHData-D-808-Open-Circuit-Board-3-1024x626.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-Open-Circuit-Board-3-1024x626.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/01\/XHData-D-808-Open-Circuit-Board-3-1024x626.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":61491,"url":"https:\/\/swling.com\/blog\/2024\/12\/rediscovering-the-golden-age-of-utility-dxing\/","url_meta":{"origin":36843,"position":1},"title":"Rediscovering the Golden Age of Utility DXing","author":"Thomas","date":"December 28, 2024","format":false,"excerpt":"Many thanks to SWLing Post contributor, Dan Greenall, who writes: Hi Thomas Back in the 1970's, I used to enjoy hunting for \"utility\" radio stations outside the regular SWBC bands. When I came across a copy of the Utility DXer's Handbook from 1971 recently on eBay, I couldn't resist purchasing\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\/2024\/12\/udxh-cover.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/12\/udxh-cover.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/12\/udxh-cover.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/12\/udxh-cover.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":36959,"url":"https:\/\/swling.com\/blog\/2019\/04\/can-you-identify-this-radio-from-the-1992-film-sneakers\/","url_meta":{"origin":36843,"position":2},"title":"Can you identify this radio from the 1992 film, &#8216;Sneakers&#8217;&#8211;?","author":"Thomas","date":"April 18, 2019","format":false,"excerpt":"Many thanks to SWLing Post contributor, Emilio Ruiz, who writes: Hi Thomas, I'm sending you and The SWLing Post readers these screenshots from the cult movie Sneakers; a great movie about incipient world of hacker security (phreaking, hacking, cryptography, etc). In a scene with Robert Redford and Dan Aykroyd, 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\/2019\/04\/Sneakers-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/Sneakers-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/Sneakers-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/04\/Sneakers-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":63824,"url":"https:\/\/swling.com\/blog\/2025\/08\/dan-shares-recordings-of-the-golden-days-of-european-shortwave-listening\/","url_meta":{"origin":36843,"position":3},"title":"Dan Shares Recordings of the Golden Days of European Shortwave Listening","author":"Thomas","date":"August 31, 2025","format":false,"excerpt":"Many thanks to SWLing Post contributor Dan Greenall, who shares the following guest post: Europe on shortwave in the 1970\u2019s by Dan Greenall During the golden years of shortwave listening, many European countries had an international shortwave service and broadcast programs to North America (where I live) in English. As\u2026","rel":"","context":"In &quot;International Broadcasting&quot;","block_context":{"text":"International Broadcasting","link":"https:\/\/swling.com\/blog\/category\/international-broadcasting\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/08\/Radio-Prague-QSL.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/08\/Radio-Prague-QSL.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/08\/Radio-Prague-QSL.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/08\/Radio-Prague-QSL.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/08\/Radio-Prague-QSL.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/08\/Radio-Prague-QSL.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":29181,"url":"https:\/\/swling.com\/blog\/2017\/11\/sdr-pioneer-dr-vanu-bose-dies-at-52\/","url_meta":{"origin":36843,"position":4},"title":"SDR pioneer Dr. Vanu Bose dies at 52","author":"Thomas","date":"November 14, 2017","format":false,"excerpt":"(Source: Southgate ARC) Software Defined Radio pioneer\u00a0Dr. Vanu Gopal Bose\u00a0passed away on November 11, 2017 aged 52 In 1998 he founded\u00a0Vanu Inc.\u00a0which pioneered the commercialization of software-defined radio and was the first company to receive FCC certification of a software-defined radio in 2004. The firm\u2019s technology, which grew out of\u2026","rel":"","context":"In &quot;Articles&quot;","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/11\/vanu-obituary2-1024x512.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/11\/vanu-obituary2-1024x512.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/11\/vanu-obituary2-1024x512.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":46931,"url":"https:\/\/swling.com\/blog\/2020\/12\/tom-builds-a-portable-loop-on-ground-antenna\/","url_meta":{"origin":36843,"position":5},"title":"Tom builds a portable Loop-On-Ground antenna","author":"Thomas","date":"December 15, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0TomL, who shares the following guest post: My First Loop-On-Ground antenna A number of people have mentioned the Loop On Ground (LOG) antenna in the past as a good receive-only antenna.\u00a0 I did some research but could only find a few examples by amateur radio\u2026","rel":"","context":"In &quot;Antennas&quot;","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\/2020\/12\/SignalStrength-e1607948761985.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/SignalStrength-e1607948761985.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/SignalStrength-e1607948761985.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/SignalStrength-e1607948761985.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/36843","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=36843"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/36843\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=36843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=36843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=36843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}