{"id":27234,"date":"2017-07-18T06:55:43","date_gmt":"2017-07-18T10:55:43","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=27234"},"modified":"2017-07-18T10:47:22","modified_gmt":"2017-07-18T14:47:22","slug":"valentino-experiments-with-a-ferrite-sheet-loop-antenna","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2017\/07\/valentino-experiments-with-a-ferrite-sheet-loop-antenna\/","title":{"rendered":"Valentino experiments with a ferrite sheet loop antenna"},"content":{"rendered":"<div id=\"attachment_27235\" style=\"width: 826px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Ferrite-Sheet-Antenna.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-27235\" class=\"size-full wp-image-27235\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Ferrite-Sheet-Antenna.jpg\" alt=\"\" width=\"816\" height=\"612\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Ferrite-Sheet-Antenna.jpg 816w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Ferrite-Sheet-Antenna-300x225.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Ferrite-Sheet-Antenna-768x576.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/Ferrite-Sheet-Antenna-624x468.jpg 624w\" sizes=\"auto, (max-width: 816px) 100vw, 816px\" \/><\/a><p id=\"caption-attachment-27235\" class=\"wp-caption-text\">Valentino&#8217;s homebrew ferrite sheet antenna.<\/p><\/div>\n<p>Many thanks to <em>SWLing Post<\/em> conttributor,\u00a0Valentino Barbi (I4BBO) who writes detailing a novel approach to FSL antenna design.<\/p>\n<p>Please note that I translated Valentino&#8217;s message from Italian to English via Google translate so please forgive any errors. Valentino writes:<\/p>\n<blockquote><p>FSL antenna radio enthusiasts typically use numerous ferrite bars with high cost, weight and scarcity,<\/p>\n<p>Ukrainian ferrite bar producers have now finished stocks and have raised their prices.<\/p>\n<p>Normally you use this site to build FSL antennas:<br \/>\n<a href=\"http:\/\/www.am-dx.com\/antennas\/FSL%20Antenna%20Design%20Optimization.htm\" target=\"_blank\" rel=\"noopener\">http:\/\/www.am-dx.com\/antennas\/FSL%20Antenna%20Design%20Optimization.htm<\/a>.<\/p>\n<p>I&#8217;ve been experimenting with a new antenna design for about 10 days comparing it with a classic FSL with 20 ferrite bars.<\/p>\n<p>Listening to the audio signals are the same, only instrumentally the antenna FSL in ferrite film<br \/>\nLoses -2dB.<\/p><\/blockquote>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27255\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl-642x1024.jpg\" alt=\"\" width=\"625\" height=\"997\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl-642x1024.jpg 642w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl-188x300.jpg 188w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl-768x1226.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl-624x996.jpg 624w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/antenna-verticalefsl.jpg 802w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/a><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27256\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C-908x1024.jpg\" alt=\"\" width=\"625\" height=\"705\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C-908x1024.jpg 908w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C-266x300.jpg 266w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C-768x866.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C-624x704.jpg 624w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant_v_fsl-7mhz-C.jpg 1435w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<blockquote><p>The construction is very simple in that the two ends overlap 5 mm.<\/p>\n<p>I did this:<\/p>\n<ul>\n<li>I took a sheet of A4 paper, I cut 5mm paper at one end.<\/li>\n<li>I laid this sheet on a 10 cm (10 cm) diameter PVC tube.<\/li>\n<li>The uncovered part of the tube is cut, now we will have exactly the exact diameter to fix the A4 sheet of ferrite with the overlap of 5 mm.<\/li>\n<\/ul>\n<\/blockquote>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27257\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi-1024x728.jpg\" alt=\"\" width=\"625\" height=\"444\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi-1024x728.jpg 1024w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi-300x213.jpg 300w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi-768x546.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi-624x444.jpg 624w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/fig.3-sch-blocchi.jpg 1280w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27258\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna-734x1024.jpg\" alt=\"\" width=\"625\" height=\"872\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna-734x1024.jpg 734w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna-215x300.jpg 215w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna-768x1071.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna-624x870.jpg 624w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/int-antenna.jpg 918w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/a> <a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-27259\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2-902x1024.jpg\" alt=\"\" width=\"625\" height=\"710\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2-902x1024.jpg 902w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2-264x300.jpg 264w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2-768x872.jpg 768w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2-624x709.jpg 624w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ant-est-2.jpg 1127w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/a><\/p>\n<blockquote><p>As for where to source a ferrite sheet, after much research I discovered this supplier almost by accident:<\/p><\/blockquote>\n<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ferrite-per-tag-nfc-schermati.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-27237\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ferrite-per-tag-nfc-schermati.jpg\" alt=\"\" width=\"399\" height=\"556\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ferrite-per-tag-nfc-schermati.jpg 399w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2017\/07\/ferrite-per-tag-nfc-schermati-215x300.jpg 215w\" sizes=\"auto, (max-width: 399px) 100vw, 399px\" \/><\/a><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.shopnfc.it\/it\/tag-nfc-schermati\/157-115-ferrite-per-tag-nfc-schermati.html#\/40-formato-foglio_a4\" target=\"_blank\" rel=\"noopener\">Click here to view the product page and ordering information.<\/a><\/p>\n<blockquote><p>In summary, the main advantages of this antenna design is weight, cost and availability of A4 sheet of ferrite.<\/p><\/blockquote>\n<p style=\"text-align: center;\"><a href=\"http:\/\/www.arimodena.it\/Members\/I4BBO\/miei-progetti\/antenna-attiva-fsl-300khz-30mhz\" target=\"_blank\" rel=\"noopener\">Click here to follow Valentino&#8217;s antenna project on his website.<\/a><\/p>\n<p>Fascinating, Valentino! Please feel free to share any further information about this FSL antenna as you experiment. It&#8217;s true that ferrite bars are becoming difficult to source. Sounds like this is an affordable alternative antenna design for ultralight DXing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Many thanks to SWLing Post conttributor,\u00a0Valentino Barbi (I4BBO) who writes detailing a novel approach to FSL antenna design. Please note that I translated Valentino&#8217;s message from Italian to English via Google translate so please forgive any errors. Valentino writes: FSL antenna radio enthusiasts typically use numerous ferrite bars with high cost, weight and scarcity, Ukrainian [&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":[373,3607,627,433,3],"tags":[6351,6350,6352,4099,5820,432,6353],"class_list":["post-27234","post","type-post","status-publish","format-standard","hentry","category-am","category-antennas","category-how-to","category-mediumwave","category-news","tag-ferrite-sheet","tag-ferrite-sheet-antenna","tag-ferrite-sheet-fsl","tag-mediumwave","tag-mediumwave-dxing","tag-mw","tag-valentino-barbi-i4bbo"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-75g","jetpack-related-posts":[{"id":55341,"url":"https:\/\/swling.com\/blog\/2023\/01\/pdf-analysis-and-design-of-fsl-antennas\/","url_meta":{"origin":27234,"position":0},"title":"PDF: Analysis and Design of FSL Antennas","author":"Thomas","date":"January 12, 2023","format":false,"excerpt":"Many thanks to SWLing Post contributor, Zoltan Azary, who has written an extensive theoretical analysis of ferrite sleeve loop antennas. This article has a very academic flavor and for those who are interested in antenna design, he welcomes your comments! Click here to download the 14 page PDF, \"Analysis and\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\/2023\/01\/FSL-Article-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/01\/FSL-Article-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/01\/FSL-Article-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/01\/FSL-Article-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/01\/FSL-Article-1.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":38261,"url":"https:\/\/swling.com\/blog\/2019\/06\/video-demonstration-of-gary-debocks-3-baby-fsl-antenna\/","url_meta":{"origin":27234,"position":1},"title":"Video Demonstration of Gary DeBock&#8217;s 3&#8243; Baby FSL Antenna","author":"Thomas","date":"June 20, 2019","format":false,"excerpt":"Many thanks to SWLing Post contributor, Gary DeBock, who shares a video of his latest Ferrite Sleeve Loop (FSL) antenna: the 3\" Baby FSL. Gary Notes: The new design 3 Inch (76mm) Baby FSL antenna is the smallest, most compact and lightweight of the \"airport friendly\" FSL's developed here recently,\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\/2019\/06\/Baby-FSL-Antenna-components-e1561029185374.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/06\/Baby-FSL-Antenna-components-e1561029185374.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/06\/Baby-FSL-Antenna-components-e1561029185374.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/06\/Baby-FSL-Antenna-components-e1561029185374.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":51093,"url":"https:\/\/swling.com\/blog\/2021\/12\/guest-post-pavels-homebrew-monster-drain-pipe-fsl-antenna\/","url_meta":{"origin":27234,"position":2},"title":"Guest Post: Pavel&#8217;s Homebrew &#8220;Monster&#8221; Drain Pipe FSL Antenna","author":"Thomas","date":"December 9, 2021","format":false,"excerpt":"Many thanks to SWLing Post contributor, Pavel Kraus, for the following guest post: Building a Drain Pipe FSL Antenna by Pavel Kraus Hi, I greet all DX fans and the entire SWLing Post community! I enjoy reading reading this blog and the diversity of contributions from our authors and contributors;\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\/2021\/12\/fig3.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/12\/fig3.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/12\/fig3.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/12\/fig3.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/12\/fig3.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":17892,"url":"https:\/\/swling.com\/blog\/2016\/03\/guest-post-jerrys-mediumwave-dxing-powerhouse-mini-fsl-antenna\/","url_meta":{"origin":27234,"position":3},"title":"Guest Post: Jerry&#8217;s Mediumwave DXing Powerhouse Mini FSL Antenna","author":"Thomas","date":"March 23, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Jerry Popiel, for the following guest post: A MW DXing Powerhouse Mini FSL Antenna by\u00a0Jerry Popiel In late February 2016 I completed construction of a modified version of Gary DeBock's excellent 3 inch Mini FSL design (click here to view). This new antenna is nothing\u2026","rel":"","context":"In &quot;AM&quot;","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"PowerhouseFSLAntenna-1","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/PowerhouseFSLAntenna-1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":23712,"url":"https:\/\/swling.com\/blog\/2017\/01\/a-new-approach-to-fsl-antenna-construction\/","url_meta":{"origin":27234,"position":4},"title":"A New Approach to FSL Antenna Construction","author":"Guy Atkins","date":"January 30, 2017","format":false,"excerpt":"Introduction I'm very fortunate to live across town from my good radio hobby pal Gary DeBock. He has been responsible for the rapid growth in Ultralight radio DXing and the construction of Ferrite Sleeve Loop (FSL) antennas. Living near each other as we do, I've benefited a lot from his\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\/2017\/01\/FLS-antenna-design-optimization-716444-300x224.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":23072,"url":"https:\/\/swling.com\/blog\/2016\/12\/video-gary-debocks-baby-fsl-antenna\/","url_meta":{"origin":27234,"position":5},"title":"Video: Gary DeBock&#8217;s &#8220;Baby FSL&#8221; antenna","author":"Thomas","date":"December 30, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Gary DeBock (N7EKX), who shares this video and notes the following on YouTube: This is the new 3.5 inch (89mm) \"Baby FSL\" antenna, designed to provide a powerful DXing gain boost for Ultralight radios (or any other portables) despite its very small size. It has\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\/12\/BabyFSL.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/BabyFSL.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/BabyFSL.jpg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/27234","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=27234"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/27234\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=27234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=27234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=27234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}