{"id":15382,"date":"2015-10-31T08:01:19","date_gmt":"2015-10-31T12:01:19","guid":{"rendered":"http:\/\/swling.com\/blog\/?p=15382"},"modified":"2015-10-31T08:01:19","modified_gmt":"2015-10-31T12:01:19","slug":"tonys-homebrew-mag-loop-antenna-and-amplifier","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2015\/10\/tonys-homebrew-mag-loop-antenna-and-amplifier\/","title":{"rendered":"Tony&#8217;s homebrew mag loop antenna and amplifier"},"content":{"rendered":"<p><a href=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-15384\" src=\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM.jpg\" alt=\"Fullscreen capture 10312015 115110 AM\" width=\"609\" height=\"626\" srcset=\"https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM.jpg 609w, https:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM-292x300.jpg 292w\" sizes=\"auto, (max-width: 609px) 100vw, 609px\" \/><\/a><\/p>\n<p>Yesterday, <a href=\"https:\/\/twitter.com\/swlbcl\" target=\"_blank\">Tony (K3DY)<\/a>, shared a video (<a href=\"https:\/\/twitter.com\/swlbcl\/status\/660231890113294336?cn=cmV0d2VldF9tZW50aW9uZWRfdXNlcg%3D%3D&amp;refsrc=email\" target=\"_blank\">via Twitter<\/a>) demonstrating his new home brew loop antenna and amplifier.<\/p>\n<p>This is actually a great demonstration of how even a relatively simple, inexpensive loop antenna can improve reception in locations with heavy radio interference. Tony includes the following notes with <a href=\"https:\/\/www.youtube.com\/watch?v=bq_gKNQSVeA\" target=\"_blank\">his video<\/a>:<\/p>\n<blockquote><p>&#8220;Testing a new receiving loop antenna that I built today. It uses a pre amplifier based on deferential setup of two 2N5109 transistors. Loop is made out of coaxial cable, only the shield is connected to the circuit.<\/p>\n<p>Quick demo on 31 meters, lots of stations at sunset time. No time for further testing but I observed a pronounced directivity below 7 MHz. 75 meters is so quiet that it makes me forget I live in a townhouse. As a comparison, my noise level on 75 meters is at S8 on an end fed [antenna].<\/p><\/blockquote>\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\/bq_gKNQSVeA?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<blockquote><p>I will use this loop primarily for SWLing purposes but I may use it as a separate receiving antenna with my amateur radio equipment.<\/p>\n<p>A lot of fun, loops are fascinating and efficient!<\/p><\/blockquote>\n<p>Indeed, Tony! And perhaps the icing on the cake is that loop antennas are so\u00a0portable, low-profile and easy to deploy. They&#8217;re ideal for those living in restricted areas and with picky\u00a0home owners&#8217; associations.<\/p>\n<p>Inspired by my buddy Vlado (N3CZ), I&#8217;ve actually been collecting\u00a0the pieces to build my own mag loop antenna this winter. I doubt the parts for my loop will exceed ten dollars as I plan to use the shield of some heavy coax for the primary loop and a little PVC for support (much like Tony&#8217;s loop).<\/p>\n<p>Tony&#8217;s video is inspiring me to go a step further and also build a simple amplifier. Any suggestions or schematics for doing so are most welcome!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yesterday, Tony (K3DY), shared a video (via Twitter) demonstrating his new home brew loop antenna and amplifier. This is actually a great demonstration of how even a relatively simple, inexpensive loop antenna can improve reception in locations with heavy radio interference. Tony includes the following notes with his video: &#8220;Testing a new receiving loop antenna [&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":[3607,8,3,304],"tags":[4358,4359,4357,3417,4360],"class_list":["post-15382","post","type-post","status-publish","format-standard","hentry","category-antennas","category-articles","category-news","category-videos","tag-homebrew","tag-homebrew-mag-loop-antenna","tag-mag-loop-antennas","tag-magnetic-loop-antennas","tag-tony-k3dy"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-406","jetpack-related-posts":[{"id":17926,"url":"https:\/\/swling.com\/blog\/2016\/03\/guest-post-building-a-magnetic-loop-antenna-broadband-amplifier-for-your-sdr\/","url_meta":{"origin":15382,"position":0},"title":"Guest Post: Building a magnetic loop antenna &#038; broadband amplifier for your SDR","author":"Thomas","date":"March 26, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Dave Gahimer (K9ZCE) for the following guest post: Small Magnetic Loop Antenna with Broadband Amplifier for SDR Reception by Dave Gahimer (K9ZCE) Those with limited space, or antenna restrictions, might find a small 1 meter loop antenna a solution. My son lives in an apartment.\u2026","rel":"","context":"In &quot;Accessories&quot;","block_context":{"text":"Accessories","link":"https:\/\/swling.com\/blog\/category\/accessories\/"},"img":{"alt_text":"Loop-Antenna","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/Loop-Antenna.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/Loop-Antenna.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/03\/Loop-Antenna.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":31772,"url":"https:\/\/swling.com\/blog\/2018\/04\/video-homebrew-am-loop-antenna-project-by-thomas-cholakov-n1spy\/","url_meta":{"origin":15382,"position":1},"title":"Video: Homebrew AM Loop Antenna Project by Thomas Cholakov (N1SPY)","author":"Thomas","date":"April 26, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Thomas Cholakov (N1SPY), who shares his latest video explaining the operation of a simple homebrew AM loop antenna: https:\/\/youtu.be\/PRMxfhLN_Ns Click here to view on YouTube. Brilliant video, Thomas! I love the fact you included a demonstration with your SDRplay RSP1A as well. Via the spectrum\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\/04\/AM-Loop-Antenna.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/AM-Loop-Antenna.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/AM-Loop-Antenna.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/04\/AM-Loop-Antenna.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":48622,"url":"https:\/\/swling.com\/blog\/2021\/04\/giuseppe-is-impressed-with-the-performance-of-his-homebrew-passive-loop-antenna\/","url_meta":{"origin":15382,"position":2},"title":"Giuseppe is impressed with the performance of his homebrew passive loop antenna","author":"Thomas","date":"April 22, 2021","format":false,"excerpt":"Many thanks to\u00a0SWLing Post\u00a0contributor, Giuseppe Morl\u00e8 (IZ0GZW), who shares the following: Dear Thomas, I'm Giuseppe Morl\u00e8 from central Italy, the Tyrrhenian Sea, Formia. Today I tested my noise canceling loop inside the radio station by comparing it to the crossed loops. Again, like my medium wave T Ferrite, this loop\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\/2021\/04\/Giuseppe.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/04\/Giuseppe.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/04\/Giuseppe.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/04\/Giuseppe.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/04\/Giuseppe.jpg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2021\/04\/Giuseppe.jpg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":31920,"url":"https:\/\/swling.com\/blog\/2018\/05\/bill-scores-a-homebrew-lw-mw-magnetic-loop-antenna\/","url_meta":{"origin":15382,"position":3},"title":"Bill scores a homebrew LW\/MW magnetic loop antenna","author":"Thomas","date":"May 7, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Bill Hemphill (WD9EQD) who shares the following: I went to the Warminster Amateur Radio Club (WARC) hamfest [yesterday] in Bucks County, PA. For some time, I have been thinking about making a loop antenna for AM DXing. It was my lucky day. When I\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\/05\/Mag-Loop-Antenna-Homebrew-1-777x1024.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/05\/Mag-Loop-Antenna-Homebrew-1-777x1024.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/05\/Mag-Loop-Antenna-Homebrew-1-777x1024.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":44834,"url":"https:\/\/swling.com\/blog\/2020\/08\/bruce-compares-two-homebrew-ncpl-antennas-to-the-airspy-youloop\/","url_meta":{"origin":15382,"position":4},"title":"Bruce compares two homebrew NCPL antennas to the Airspy Youloop","author":"Thomas","date":"August 16, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Bruce (VE3EAR), who writes: I decided that more testing of the Noise-Cancelling Passive Loop (YouLoop) antenna was needed, but I wanted to start with a clean page. I built two identical loops using some 3\/8 inch heliax scraps I had on hand. Both are\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\/08\/YouLoop2.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/08\/YouLoop2.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/08\/YouLoop2.jpeg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":50098,"url":"https:\/\/swling.com\/blog\/2021\/08\/wire-antennas-vs-mag-loop-antennas\/","url_meta":{"origin":15382,"position":5},"title":"Wire antennas vs. mag loop antennas","author":"Thomas","date":"August 29, 2021","format":false,"excerpt":"In the past few weeks, I've gotten a lot of questions from readers who are trying to decide if they should install a magnetic loop antenna or a simple wire antenna at their home. Obviously, most of the questions come from shortwave radio listeners, but some have come from ham\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\/2014\/06\/Elecraft-KX3.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/06\/Elecraft-KX3.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2014\/06\/Elecraft-KX3.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/15382","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=15382"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/15382\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=15382"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=15382"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=15382"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}