{"id":17852,"date":"2016-03-20T09:13:59","date_gmt":"2016-03-20T13:13:59","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=17852"},"modified":"2016-03-20T09:13:59","modified_gmt":"2016-03-20T13:13:59","slug":"paul-litwinovich-on-the-life-decline-and-possible-rebirth-of-am","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2016\/03\/paul-litwinovich-on-the-life-decline-and-possible-rebirth-of-am\/","title":{"rendered":"Paul Litwinovich on &#8220;The Life, Decline and Possible Rebirth of AM&#8221;"},"content":{"rendered":"<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Zenith-Shuttle-Dial.jpg\" rel=\"attachment wp-att-12496\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-12496\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Zenith-Shuttle-Dial-1024x678.jpg\" alt=\"Zenith-Shuttle-Dial\" width=\"584\" height=\"387\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Zenith-Shuttle-Dial-1024x678.jpg 1024w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Zenith-Shuttle-Dial-300x199.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/02\/Zenith-Shuttle-Dial.jpg 1280w\" sizes=\"auto, (max-width: 584px) 100vw, 584px\" \/><\/a>Many thanks to the <em>SWLing Post<\/em> reader who noted <a href=\"http:\/\/wshu.org\/post\/vintage-radio-life-decline-and-possible-rebirth-am\" target=\"_blank\">this latest post<\/a> by Paul Litwinovich at WSHU (<a href=\"http:\/\/swling.com\/blog\/tag\/paul-litwinovich\/\" target=\"_blank\">Paul is frequently referenced here on the <em>Post<\/em><\/a>).<\/p>\n<p>A short excerpt:<\/p>\n<p style=\"padding-left: 30px;\"><em>&#8220;AM occurs elsewhere in nature. A lightning strike or manmade electrical discharge will produce a burst of electrical noise that varies in amplitude. Since AM radios are designed to detect variations in amplitude, this is why they are prone to interference from such things. AM held sway as the primary method of modulating a radio wave up to WWII, not only for broadcasting, but for all types of radio communications.<\/em><\/p>\n<p style=\"padding-left: 30px;\"><em>Every vintage consumer radio, be it standard broadcast or shortwave, up to WWII, received amplitude modulated signals. Nowadays, AM broadcast stations are associated with lower quality audio, but such was not always the case. Receiver design really came of age in the 1930s with the superheterodyne circuit and advancements in loudspeaker design. The grand floor consoles of the late 1930s leading up to WWII were capable of producing audio that was very good, even by today\u2019s standards, the only exception being that they were monaural, as stereo technology was still a ways off.&#8221;[&#8230;]<\/em><\/p>\n<p>Litwinovich&#8217;s article is a must-read as he gives a concise overview of amplitude modulation, AM vs. FM, and even covers current proposed uses of the broadcast band (<a href=\"http:\/\/swling.com\/blog\/2016\/02\/am-radio-proposal-has-class-a-broadcasters-upset\/\" target=\"_blank\">something we&#8217;ve also recently mentioned<\/a>).<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"http:\/\/wshu.org\/post\/vintage-radio-life-decline-and-possible-rebirth-am\" target=\"_blank\">Click here to read\u00a0The Life, Decline and Possible Rebirth of AM<\/a>.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to the SWLing Post reader who noted this latest post by Paul Litwinovich at WSHU (Paul is frequently referenced here on the Post). A short excerpt: &#8220;AM occurs elsewhere in nature. A lightning strike or manmade electrical discharge will produce a burst of electrical noise that varies in amplitude. Since AM radios are [&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":[373,8,433,3,288],"tags":[4097,4784,4866,4099,3232,4091,3234],"class_list":["post-17852","post","type-post","status-publish","format-standard","hentry","category-am","category-articles","category-mediumwave","category-news","category-radio-history","tag-am","tag-am-broadcasting","tag-am-future","tag-mediumwave","tag-paul-litwinovich","tag-radio-history","tag-wshu"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-4DW","jetpack-related-posts":[{"id":12864,"url":"https:\/\/swling.com\/blog\/2015\/03\/paul-litwinovich-sheds-light-on-the-royalty-of-radios\/","url_meta":{"origin":17852,"position":0},"title":"Paul Litwinovich sheds light on the &#8220;Royalty of Radios&#8221;","author":"Thomas","date":"March 29, 2015","format":false,"excerpt":"Many thanks to SWLing Post reader, Paul, who points out this excellent article about the Zenith Transoceanic\u00a0by\u00a0Paul Litwinovich of WSHU.\u00a0 Litwinovich's article covers a brief history\u00a0of the Zenith Transoceanic series including photos from his amazing collection (check out his model 7G605 above). Here's a short clip from his full article:\u2026","rel":"","context":"In &quot;Articles&quot;","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"Zenith Model 7G605, the first in the line of Trans-Oceanic radios. Credit P. Litwinovich collection via WSHU","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/Zenith-Paul-Litwinovich.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/Zenith-Paul-Litwinovich.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/03\/Zenith-Paul-Litwinovich.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":30824,"url":"https:\/\/swling.com\/blog\/2018\/02\/paul-explores-the-luxembourg-effect\/","url_meta":{"origin":17852,"position":1},"title":"Paul explores the Luxembourg Effect","author":"Thomas","date":"February 11, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mike Hansgen, who shares the following article by\u00a0Paul Litwinovich at WSHU: In this article I\u2019ll look at two things that, unless you are a serious ham operator or an absolute radio geek, you probably are unfamiliar with. First, we will take a look at\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\/2016\/08\/HAARP.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/HAARP.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/HAARP.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/08\/HAARP.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":10790,"url":"https:\/\/swling.com\/blog\/2014\/09\/paul-litwinovichs-vintage-radio-series\/","url_meta":{"origin":17852,"position":2},"title":"Paul Litwinovich&#8217;s Vintage Radio series","author":"Thomas","date":"September 12, 2014","format":false,"excerpt":"Many thanks to SWLing Post reader, Richard Cuff, for pointing out\u00a0a brilliant series of articles called Vintage Radio\u00a0by WSHU Chief Engineer,\u00a0Paul Litwinovich. Here are links to each article written thus far in the Vintage Radio series. If you would like to start at the beginning of the series, go to\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":"SX-99-Dial","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/05\/SX-99-Dial-1024x192.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/05\/SX-99-Dial-1024x192.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/05\/SX-99-Dial-1024x192.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":54704,"url":"https:\/\/swling.com\/blog\/2022\/11\/radio-physics-explained-the-luxemburg-gorky-effect\/","url_meta":{"origin":17852,"position":3},"title":"Radio physics explained: The Luxemburg-Gorky effect","author":"13dka","date":"November 21, 2022","format":false,"excerpt":"Get it while you still can: The Luxemburg-Gorky effect by 13dka \"In radiophysics, the Luxemburg-Gorky effect (named after Radio Luxemburg and the city of Gorky (Nizhny Novgorod)) is a phenomenon of cross modulation between two radio waves, one of which is strong, passing through the same part of a medium,\u2026","rel":"","context":"In &quot;Longwave&quot;","block_context":{"text":"Longwave","link":"https:\/\/swling.com\/blog\/category\/longwave\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/11\/LE-JunglinsterTransmitter680-300x182.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/11\/LE-JunglinsterTransmitter680-300x182.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/11\/LE-JunglinsterTransmitter680-300x182.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":14338,"url":"https:\/\/swling.com\/blog\/2015\/08\/obtaining-qsls-from-am-broadcast-stations\/","url_meta":{"origin":17852,"position":4},"title":"Obtaining QSLs from AM broadcast stations?","author":"Thomas","date":"August 12, 2015","format":false,"excerpt":"SWLing Post reader, Paul Grodkowski, writes: \"Just a quick question to anyone at the SWLing Post: Is the practice of sending a reception report to a AM broadcast station in return\u00a0for a QSL card still accepted in the age of the internet ? So many stations are broadcasting online now\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"RCA-Dial","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/05\/RCA-Dial-1024x576.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/05\/RCA-Dial-1024x576.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/05\/RCA-Dial-1024x576.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":35578,"url":"https:\/\/swling.com\/blog\/2019\/01\/fred-jacobs-on-rekindling-our-fading-romance-with-am-radio\/","url_meta":{"origin":17852,"position":5},"title":"Fred Jacobs on &#8220;Rekindling Our Fading Romance With AM Radio&#8221;","author":"Thomas","date":"January 14, 2019","format":false,"excerpt":"Many thanks to SWLing Post contributor, Dennis Dura, who shares the following article which appeared in Jacob's Media Strategies on Dec 31, 2018. I've pasted an excerpt below, but you'll want to read the entire piece by clicking here: Rekindling Our Fading Romance With AM Radio I know I may\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\/2016\/02\/WHKY-AM-Radio-Tower.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/WHKY-AM-Radio-Tower.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/WHKY-AM-Radio-Tower.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/02\/WHKY-AM-Radio-Tower.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/17852","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=17852"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/17852\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=17852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=17852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=17852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}