{"id":31920,"date":"2018-05-07T06:37:23","date_gmt":"2018-05-07T10:37:23","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=31920"},"modified":"2018-05-07T06:37:23","modified_gmt":"2018-05-07T10:37:23","slug":"bill-scores-a-homebrew-lw-mw-magnetic-loop-antenna","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2018\/05\/bill-scores-a-homebrew-lw-mw-magnetic-loop-antenna\/","title":{"rendered":"Bill scores a homebrew LW\/MW magnetic loop antenna"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Many thanks to SWLing Post<\/em> contributor, Bill Hemphill (WD9EQD) who shares the following:<\/p>\n

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 walked to the inside tables, on the very first table was this homemade loop antenna gentleman was selling from an estate.<\/p>\n

I snatched it up for $40.<\/p>\n

Attached are some photos of it. It\u2019s 25\u201d by 25\u201d, with a swivel base. There are 23 turns of wire and I have no idea what size the capacitor is. I did some preliminary tests and it tunes from 280 kHz to 880 kHz. So it\u2019s the covers the high half of the long wave band and the low half of the AM band.<\/p><\/blockquote>\n

\"\"<\/a><\/p>\n

It\u2019s very well made and I fugue I can modify it to cover the entire AM band.<\/p>\n

[…]I hooked the SDRplay RSP2 to it and was getting good signals of major stations all the way to 15 mHz.<\/p><\/blockquote>\n

\"\"<\/a><\/p>\n

That\u2019s with it sitting on my dining room table. Of course the capacitor wouldn\u2019t peak the signals.<\/p>\n

So it was a great day at the hamfest!<\/p><\/blockquote>\n

Indeed that was a great find, Bill!\u00a0 Someone spent a decent amount of time building that furniture-grade loop support. Indeed, it’s very reminiscent of 1920s-30s mediumwave loops!<\/p>\n

What I love about your loop (and that of Thomas Cholakov<\/a>) is that one can see how simple these antennas actually are to build. The only complicated bit is the support, but even that’s simple if you use the shield of a heavy coax or flexible copper tubing.<\/p>\n

Thanks for sharing and enjoy logging DX with your new-to-you loop!<\/p>\n","protected":false},"excerpt":{"rendered":"

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 walked to the inside tables, […]<\/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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[373,3607,2436,433,3],"tags":[4339,6954,4359,4667,4357,3417],"class_list":["post-31920","post","type-post","status-publish","format-standard","hentry","category-am","category-antennas","category-longwave","category-mediumwave","category-news","tag-am-passive-loop-antenna","tag-bill-hemphill-wd9eqd","tag-homebrew-mag-loop-antenna","tag-loop-antennas","tag-mag-loop-antennas","tag-magnetic-loop-antennas"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-8iQ","jetpack-related-posts":[{"id":33579,"url":"https:\/\/swling.com\/blog\/2018\/08\/bill-tweaks-his-am-loop-antenna-for-optimal-mediumwave-performance\/","url_meta":{"origin":31920,"position":0},"title":"Bill tweaks his AM loop antenna for optimal mediumwave performance","author":"Thomas","date":"August 17, 2018","format":false,"excerpt":"Many thanks to SWLing Post contributor, Bill Hemphill (WD9EQD), who writes with the following update to his previous post: As you may remember, back in May, I picked up a beautiful home-made loop antenna. It was 25 inches on a side with 23 turns of wire. My initial testing showed\u2026","rel":"","context":"In "AM"","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\/08\/loop-calculator-2.png?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/08\/loop-calculator-2.png?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/08\/loop-calculator-2.png?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":43930,"url":"https:\/\/swling.com\/blog\/2020\/06\/bills-first-dx-contest-using-a-panasonic-rf-2200-and-a-hombrew-diode-loop-radio\/","url_meta":{"origin":31920,"position":1},"title":"Bill’s first DX contest using a Panasonic RF-2200 and a hombrew diode\/loop radio","author":"Thomas","date":"June 19, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Bill Hemphill (WD9EQD), who shares the following guest post: My First DX Contest by Bill Hemphill, WD9EQD Being a recent new member of NJARC, this is my first time competing in this contest.\u00a0 I have always been a big fan of BCB DXing and\u2026","rel":"","context":"In "AM"","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\/2020\/06\/NJARC-Contest-Logs-Bill-1.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/06\/NJARC-Contest-Logs-Bill-1.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/06\/NJARC-Contest-Logs-Bill-1.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/06\/NJARC-Contest-Logs-Bill-1.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":31772,"url":"https:\/\/swling.com\/blog\/2018\/04\/video-homebrew-am-loop-antenna-project-by-thomas-cholakov-n1spy\/","url_meta":{"origin":31920,"position":2},"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 "AM"","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":28543,"url":"https:\/\/swling.com\/blog\/2017\/09\/larrys-variation-of-the-w6lvp-amplified-magnetic-loop-antenna\/","url_meta":{"origin":31920,"position":3},"title":"Larry’s variation of the W6LVP amplified magnetic loop antenna","author":"Thomas","date":"September 28, 2017","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Larry Thompson (WPE8EKM), who writes: I\u2019ve just finished building a variation of the W6LVP amplified magnetic loop antenna. I was able to purchase the preamplifier, power inserter, and the power supply separately. I then created my own loop antenna using LMR400Max coax and designed my\u2026","rel":"","context":"In "Antennas"","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\/2017\/09\/Loop-Antenna.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/09\/Loop-Antenna.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2017\/09\/Loop-Antenna.jpg?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":31920,"position":4},"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 "Antennas"","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":[]},{"id":15382,"url":"https:\/\/swling.com\/blog\/2015\/10\/tonys-homebrew-mag-loop-antenna-and-amplifier\/","url_meta":{"origin":31920,"position":5},"title":"Tony’s homebrew mag loop antenna and amplifier","author":"Thomas","date":"October 31, 2015","format":false,"excerpt":"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: \"Testing\u2026","rel":"","context":"In "Antennas"","block_context":{"text":"Antennas","link":"https:\/\/swling.com\/blog\/category\/antennas\/"},"img":{"alt_text":"Fullscreen capture 10312015 115110 AM","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/Fullscreen-capture-10312015-115110-AM.jpg?resize=525%2C300 1.5x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/31920","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=31920"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/31920\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=31920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=31920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=31920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}