{"id":39978,"date":"2019-10-02T07:32:05","date_gmt":"2019-10-02T11:32:05","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=39978"},"modified":"2019-10-02T07:32:05","modified_gmt":"2019-10-02T11:32:05","slug":"the-public-radio-a-one-frequency-fm-receiver-housed-in-a-mason-jar","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2019\/10\/the-public-radio-a-one-frequency-fm-receiver-housed-in-a-mason-jar\/","title":{"rendered":"The Public Radio: A one frequency FM receiver housed in a Mason jar"},"content":{"rendered":"<p><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/10\/The-Public-Radio-FM-Receiver.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-39979\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/10\/The-Public-Radio-FM-Receiver.jpg\" alt=\"\" width=\"761\" height=\"460\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/10\/The-Public-Radio-FM-Receiver.jpg 761w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/10\/The-Public-Radio-FM-Receiver-300x181.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2019\/10\/The-Public-Radio-FM-Receiver-624x377.jpg 624w\" sizes=\"auto, (max-width: 761px) 100vw, 761px\" \/><\/a><\/p>\n<p>Many thanks to <em>SWLing Post<\/em> contributor, Paul, who shares a number of articles about the one-frequency FM radio called the <em>Public Radio<\/em>:<\/p>\n<blockquote><p>Might be of interest to you and readers of the SWLing Post:<br \/>\n<a href=\"https:\/\/www.thepublicrad.io\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/www.thepublicrad.io\/<\/a><\/p>\n<p>Why does the Public Radio cost $60?<br \/>\n<a href=\"http:\/\/pencerw.com\/feed\/2018\/11\/21\/why-its-sixty-dollars\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/pencerw.com\/feed\/2018\/11\/21\/why-its-sixty-dollars<\/a><\/p>\n<p>How to program a radio which is sealed inside a cardboard shipping box (they did not implement this for production):<br \/>\n<a href=\"https:\/\/wp.josh.com\/2017\/03\/18\/capacitive-coupling-casestudy-programming-the-public-radio-without-removing-it-from-its-sealed-shipping-box\/\" target=\"_blank\" rel=\"noopener noreferrer\">https:\/\/wp.josh.com\/2017\/03\/18\/capacitive-coupling-casestudy-programming-the-public-radio-without-removing-it-from-its-sealed-shipping-box\/<\/a><\/p>\n<p>The Public Radio manufacturing line:<br \/>\n<a href=\"http:\/\/pencerw.com\/feed\/2018\/2\/8\/the-public-radios-assembly-fulfillment-processes\" target=\"_blank\" rel=\"noopener noreferrer\">http:\/\/pencerw.com\/feed\/2018\/2\/8\/the-public-radios-assembly-fulfillment-processes<\/a><\/p><\/blockquote>\n<p>Thanks for sharing, Paul. We&#8217;ve mentioned the Public Radio before, but I did not realize they were completely produced and assembled in the US.<\/p>\n<p><em><strong>Post Readers<\/strong><\/em>: Please comment if you own a <em>Public Radio<\/em>. I&#8217;m very curious what you think about the audio fidelity.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor, Paul, who shares a number of articles about the one-frequency FM radio called the Public Radio: Might be of interest to you and readers of the SWLing Post: https:\/\/www.thepublicrad.io\/ Why does the Public Radio cost $60? http:\/\/pencerw.com\/feed\/2018\/11\/21\/why-its-sixty-dollars How to program a radio which is sealed inside a cardboard shipping [&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":[3781,3],"tags":[1584,20,7769,8045],"class_list":["post-39978","post","type-post","status-publish","format-standard","hentry","category-fm","category-news","tag-fm","tag-npr","tag-public-radio","tag-the-public-radio"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-aoO","jetpack-related-posts":[{"id":26857,"url":"https:\/\/swling.com\/blog\/2017\/07\/tecsun-pl-660-hidden-feature-fm-calibration\/","url_meta":{"origin":39978,"position":0},"title":"Tecsun PL-660 Hidden Feature: FM Calibration","author":"Thomas","date":"July 4, 2017","format":false,"excerpt":"Many thanks to SWLing Post contributor, Rick B, who writes: I just thought I'd share with you a hidden function I discovered documented on the web for the Tecsun PL-660. It's how to calibrate the FM band if you have a radio that is off frequency. As my current PL-660\u2026","rel":"","context":"In &quot;FM&quot;","block_context":{"text":"FM","link":"https:\/\/swling.com\/blog\/category\/fm\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/PL-660.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/PL-660.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/07\/PL-660.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":62071,"url":"https:\/\/swling.com\/blog\/2025\/02\/rfi-fm-habits-and-jeffs-tabletop-radio-temptation\/","url_meta":{"origin":39978,"position":1},"title":"RFI, FM Habits, and Jeff&#8217;s Tabletop Radio Temptation","author":"Thomas","date":"February 15, 2025","format":false,"excerpt":"Many thanks to SWLing Post contributor Jeff McMahon for sharing a recent Herculodge post, where he battles radio frequency interference (RFI) while trying to enjoy his Tecsun PL-990\u2014only to find his PL-880 unaffected. This led to a deeper reflection on FM listening habits and the temptation of tabletop radios like\u2026","rel":"","context":"In &quot;FM&quot;","block_context":{"text":"FM","link":"https:\/\/swling.com\/blog\/category\/fm\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/JEff-McMahon-PL-990.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/JEff-McMahon-PL-990.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/JEff-McMahon-PL-990.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/02\/JEff-McMahon-PL-990.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":49367,"url":"https:\/\/swling.com\/blog\/2021\/06\/mfj-will-begin-selling-eton-shortwave-receiver-products-effective-immediately\/","url_meta":{"origin":39978,"position":2},"title":"&#8220;MFJ will begin selling Eton Shortwave Receiver Products effective immediately&#8221;","author":"Thomas","date":"June 25, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributors, Eric McFadden and Mike Agner, who share the following announcement from MFJ: MFJ to sell\u00a0Eton\u00a0Shortwave Receivers! Elite 750 A 360-degree rotating AM antenna enhances the radio's ability to pull in weak AM signals. You can listen to AM, FM , SW, LW, SSB and\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\/2021\/06\/Eton-Traveler.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/06\/Eton-Traveler.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":53301,"url":"https:\/\/swling.com\/blog\/2022\/07\/ken-reverse-engineers-the-apollo-spacecrafts-fm-radio\/","url_meta":{"origin":39978,"position":3},"title":"Ken reverse-engineers the Apollo spacecraft&#8217;s FM radio","author":"Thomas","date":"July 11, 2022","format":false,"excerpt":"Many thanks to SWLing Post contributor, Paul, who shares the following post from Ken Shirriffs' Blog: Reverse-engineering the Apollo spacecraft's FM radio How did NASA communicate with the Apollo astronauts, hundreds of thousands of miles from Earth? The premodulation processor1\u00a0(below) was the heart of the communication system onboard the Apollo\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\/2022\/07\/Apollo-relay-modes.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2022\/07\/Apollo-relay-modes.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":56495,"url":"https:\/\/swling.com\/blog\/2023\/05\/guest-post-review-of-an-affordable-compact-dab-portable-radio\/","url_meta":{"origin":39978,"position":4},"title":"Guest Post: Review of an affordable, compact DAB+ portable radio","author":"Thomas","date":"May 3, 2023","format":false,"excerpt":"Many thanks to SWLing Post contributor, Mangosman, who shares the following review: DAB+ digital audio\/FM receiver and Bluetooth Audio Player with 2.4 inch LCD Display\u00a0 by Mangosman Digital Audio Broadcasting with improved audio compression and error correction is called DAB+. I have had this radio for a few years. Retail\u2026","rel":"","context":"In &quot;Digital Audio Broadcasting&quot;","block_context":{"text":"Digital Audio Broadcasting","link":"https:\/\/swling.com\/blog\/category\/digital-audio-broadcasting\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/DAB-Radio-1.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":35328,"url":"https:\/\/swling.com\/blog\/2018\/12\/any-reviews-of-the-jinserta-mini-portable-radio\/","url_meta":{"origin":39978,"position":5},"title":"Any reviews of the JINSERTA Mini portable radio?","author":"Thomas","date":"December 26, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Marc Thomas, who writes: I was wondering if anyone has tried this $40 receiver that seems to have an exceptionally broad frequency coverage: SW: 2-30MHZ, 5KHZ STEP AM: 520-1720, 9K\/10K STEP SEL FM: 87.5-108MHZ, 0.1MHZ STEP AIR: 118-138MHZ, 5K\/50K STEP SEL VHF: 30-223MHZ, FM-N\/FM-W\u2026","rel":"","context":"In &quot;FM&quot;","block_context":{"text":"FM","link":"https:\/\/swling.com\/blog\/category\/fm\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/12\/91A911BE-7BFB-4D61-8E8E-4276CF9543FE.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/12\/91A911BE-7BFB-4D61-8E8E-4276CF9543FE.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/12\/91A911BE-7BFB-4D61-8E8E-4276CF9543FE.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/39978","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=39978"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/39978\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=39978"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=39978"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=39978"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}