{"id":57804,"date":"2023-09-24T05:00:54","date_gmt":"2023-09-24T09:00:54","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=57804"},"modified":"2023-09-22T06:13:28","modified_gmt":"2023-09-22T10:13:28","slug":"martin-builds-a-simple-ferrite-rod-to-inductively-couple-radios-to-his-external-mediumwave-antenna","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2023\/09\/martin-builds-a-simple-ferrite-rod-to-inductively-couple-radios-to-his-external-mediumwave-antenna\/","title":{"rendered":"Martin builds a simple ferrite rod to inductively couple radios to his external mediumwave antenna"},"content":{"rendered":"<p><strong>Many thanks to <em>SWLing Post<\/em> contributor, Martin Tobisch, who shares the following guest post and videos from his home in Malta:<\/strong><\/p>\n<hr \/>\n<h1>New AM Signal Coupler<\/h1>\n<p><a href=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1.jpeg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-57805\" src=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1.jpeg\" alt=\"\" width=\"1200\" height=\"2134\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1.jpeg 1200w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1-169x300.jpeg 169w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1-576x1024.jpeg 576w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1-768x1366.jpeg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1-864x1536.jpeg 864w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1-1152x2048.jpeg 1152w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/09\/AM-Radio-Coupled-Antenna-Martin-1-624x1110.jpeg 624w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a>Many AM medium wave listeners are looking for solutions to improve the reception performance of their radios.<\/p>\n<p>After many attempts, which I don&#8217;t want to entertain anyone with, a coupler was created that feeds the external antenna directly into the ferrite antenna. I use my 66 foot long wire antenna on 50 ohm RG-58 cable, but other antennas will have similar success.<\/p>\n<p>The clips available on YouTube speak for themselves:<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"625\" height=\"352\" src=\"https:\/\/www.youtube.com\/embed\/FIylJk3F9Xk?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-US&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"625\" height=\"352\" src=\"https:\/\/www.youtube.com\/embed\/RHAla9jPoi8?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-US&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p>&nbsp;<\/p>\n<p>Experiments with smaller ferrites and antenna rods met with no success. It is important that the coupler still works even at a distance from the ferrite antenna and without precise alignment.<\/p>\n<p>With tube radios it easily bridges the distance from the housing to the ferrite rod Antenna<br \/>\nThe finished coupler consists of 6 NiZn ferrite cores, which are connected with glue to form a rod. 8 turns of wire are wound over this and soldered to an RG-58 cable. Some electrical isolation tape and ready. So far I&#8217;ve just put it in a box. Of course there are finer solutions and it should be protected against shock. Ferrite cores are notoriously brittle.<\/p>\n<p><a href=\"https:\/\/www.aliexpress.us\/item\/3256803944153459.html?spm=a2g0o.detail.1000014.6.e5f513e4jejjpB&amp;gps-id=pcDetailBottomMoreOtherSeller&amp;scm=1007.40000.267768.0&amp;scm_id=1007.40000.267768.0&amp;scm-url=1007.40000.267768.0&amp;pvid=d4089262-9be7-4009-a2b5-e4bdc00d5c26&amp;_t=gps-id%3ApcDetailBottomMoreOtherSeller%2Cscm-url%3A1007.40000.267768.0%2Cpvid%3Ad4089262-9be7-4009-a2b5-e4bdc00d5c26%2Ctpp_buckets%3A668&amp;gatewayAdapt=deu2usa4itemAdapt&amp;pdp_ext_f=%7B%22sku_id%22:%2212000028135719830%22,%22sceneId%22:%2230050%22%7D&amp;pdp_npi=2@dis!EUR!3.16!1.42!!!!!@210312cd16692748717112897e1a66!12000028135719830!rec\" target=\"_blank\" rel=\"noopener\">Here is a link to the ferrites used (purchased at AliExpress).<\/a><\/p>\n<p>Advantages: Advantages to what? Nothing comparable exists.<\/p>\n<p>So there are advantages to feeding via an antenna socket. The signal coupler is also good for radios without an antenna socket. But in case of using an antenna socket, common mode wave interference picked up in the house goes unlimited into the radio. Due to the magnetic coupling to the ferrite antenna, common mode waves are completely suppressed. They do not create a magnetic field in the coupler.<\/p>\n<p>No changes are necessary in the radio<\/p>\n<p>The biggest advantage is, that you can listen to distant stations loud and clear, which previously only produced a quiet scratching noise.<\/p>\n<p>I very much welcome reports of experiences.<\/p>\n<p><a href=\"mailto:Martin.Tobisch@aol.com\" target=\"_blank\" rel=\"noopener\">Martin.Tobisch@aol.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post contributor, Martin Tobisch, who shares the following guest post and videos from his home in Malta: New AM Signal Coupler Many AM medium wave listeners are looking for solutions to improve the reception performance of their radios. After many attempts, which I don&#8217;t want to entertain anyone with, a coupler [&hellip;]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","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":[4199,3607,627,3],"tags":[1643,8498,10328,6772],"class_list":["post-57804","post","type-post","status-publish","format-standard","hentry","category-accessories","category-antennas","category-how-to","category-news","tag-antennas","tag-homebrew-antennas","tag-martin-tobisch","tag-mediumwave-antennas"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-f2k","jetpack-related-posts":[{"id":60962,"url":"https:\/\/swling.com\/blog\/2024\/10\/pavels-practical-electronics-homebrew-mediumwave-ferrite-antenna\/","url_meta":{"origin":57804,"position":0},"title":"Pavel&#8217;s Practical Electronics Homebrew Mediumwave Ferrite Antenna","author":"Thomas","date":"October 27, 2024","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Pavel Kraus, who shares the following guest post: Mediumwave Ferrite Antenna by Pavel Kraus This antenna for MW was made according to the instructions from Everyday Practical Electronics magazine, September 2000. The author of the Active Ferrite Loop Aerial construction project is Raymond Haigh. The\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\/2024\/10\/konstrukce-anteny.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/10\/konstrukce-anteny.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/10\/konstrukce-anteny.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/10\/konstrukce-anteny.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/10\/konstrukce-anteny.jpeg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2024\/10\/konstrukce-anteny.jpeg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":31586,"url":"https:\/\/swling.com\/blog\/2018\/04\/the-professor-reviews-the-rfa200-external-ferrite-antenna\/","url_meta":{"origin":57804,"position":1},"title":"The Professor reviews the RFA200 external ferrite antenna","author":"Thomas","date":"April 11, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, The Professor, who shares the following review of the RFA200 external ferrite antenna: A Quick Review of the RFA200 The Professor I've considered saying something here about RFA200, as I bought one of these not long after its existence was announced on this blog\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/Tecsun-R-9012-and-RFA200-Antenna-Mediumwave.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/Tecsun-R-9012-and-RFA200-Antenna-Mediumwave.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/Tecsun-R-9012-and-RFA200-Antenna-Mediumwave.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":47162,"url":"https:\/\/swling.com\/blog\/2021\/01\/giuseppes-homebrew-rotating-ferrite-antenna\/","url_meta":{"origin":57804,"position":2},"title":"Giuseppe&#8217;s homebrew rotating ferrite antenna","author":"Thomas","date":"January 5, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Giuseppe Morl\u00e8 (IZ0GZW), who writes: Dear Thomas, I'm Giuseppe Morl\u00e8 (IZ0GZW) from Formia, on the Tyrrhenian Sea, in Italy . I built this simple rotating directive ferrite antenna for medium waves and the 160 meters ham band. Inside the tube there are 2 ferrites\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\/2021\/01\/Double-Ferrite-Antenna-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Double-Ferrite-Antenna-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Double-Ferrite-Antenna-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/01\/Double-Ferrite-Antenna-1.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":30931,"url":"https:\/\/swling.com\/blog\/2018\/02\/external-ferrite-antenna-by-playloudfm\/","url_meta":{"origin":57804,"position":3},"title":"External Ferrite Antenna by playloudfm","author":"Troy Riedel","date":"February 21, 2018","format":false,"excerpt":"Posted by SWLing Post contributor Troy Riedel: I just noticed something on eBay.\u00a0 Seller \"playloudfm\" based in Greece (100% feedback rating), the first to offer the high gain external ferrite antenna for the Tecsun PL-360\/PL-365\/County Comm GP5, has a new offering: From the seller's listing: - Frequency: 530Khz - 1710Khz\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\/2018\/02\/Playloudfm3-1024x451.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/02\/Playloudfm3-1024x451.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/02\/Playloudfm3-1024x451.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":16638,"url":"https:\/\/swling.com\/blog\/2016\/01\/a-high-gain-ferrite-bar-antenna-for-the-pl-360pl-365-and-countycomm-gp5-series\/","url_meta":{"origin":57804,"position":4},"title":"A high-gain ferrite bar antenna for the PL-360\/PL-365 and CountyComm GP5 series","author":"Thomas","date":"January 6, 2016","format":false,"excerpt":"If you own a Tecsun PL-360, PL-365 or a CountyComm GP5\/DSP or GP5\/SSB, you might take note of this large ferrite bar antenna offered by a Greece-based seller on eBay. As you can see in the image above, this antenna is substantially larger than the stock MW antenna supplied by\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"Ferrite-Bar-Antenna-PL-365-GP5SSB","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Ferrite-Bar-Antenna-PL-365-GP5SSB-1024x576.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Ferrite-Bar-Antenna-PL-365-GP5SSB-1024x576.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/01\/Ferrite-Bar-Antenna-PL-365-GP5SSB-1024x576.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":41082,"url":"https:\/\/swling.com\/blog\/2019\/12\/new-product-tecsun-an-48x-now-available\/","url_meta":{"origin":57804,"position":5},"title":"New Product: Tecsun AN-48x (now available)","author":"Troy Riedel","date":"December 6, 2019","format":false,"excerpt":"Anon-Co just announced that Tecsun has released their new portable, active loop antenna - the AN-48x (27.99 plus shipping) \u2013 and it is available for purchase.\u00a0 Copied below is their announcement: Tecsun has launched its latest antenna which is now available at Anon-Co! This active loop antenna has a portable\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/12\/AN-48x-300x240.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/57804","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=57804"}],"version-history":[{"count":1,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/57804\/revisions"}],"predecessor-version":[{"id":57806,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/57804\/revisions\/57806"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=57804"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=57804"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=57804"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}