{"id":8325,"date":"2024-02-20T08:12:34","date_gmt":"2024-02-20T02:42:34","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=8325"},"modified":"2024-02-20T19:02:51","modified_gmt":"2024-02-20T13:32:51","slug":"close-look-at-a-11-current-balun","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/close-look-at-a-11-current-balun\/","title":{"rendered":"Close Look at a 1:1 Current Balun"},"content":{"rendered":"<p><iframe loading=\"lazy\" title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/gDbbd4hXWsI?si=9Hii0IY5bdp_PhHb\" width=\"560\" height=\"315\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>I did not put a balun at the feedpoint of <a href=\"https:\/\/johnsonfrancis.org\/techworld\/can-this-simple-antenna-take-my-ham-radio-signals-to-the-other-side-of-globe\/\">my 20 m inverted V dipole antenna<\/a> as I did not have the raw materials to make one. So I bought a 1:1 Current Balun from <a href=\"http:\/\/homebrewcorner.blogspot.com\/p\/page-update-642015-gek-baluns-1.html\">another ham<\/a>. Before installing it for my 20 m antenna, out of curiosity, I thought of having a closer look at it. It is rated for 1000 W, though my radio is only 100 W. A lower powered option was not available. Frequency range is written as 500 kHz to 55 MHz. So I presume that I can use it for a 50 MHz or 6 m dipole at a later date if needed. I have bought a four band <a href=\"https:\/\/johnsonfrancis.org\/techworld\/what-is-an-end-fed-half-wave-efhw-antenna\/\">EFHW<\/a> also along with it. If that works out well, I will not need the current 20 m dipole and I could repurpose this balun for 6 m experiments in future. On the lower side you can see the SO 239 connector for attaching the coaxial cable. Two connectors are seen on the upper side for attaching two wires of the dipole antenna. A nice stainless steel hook is there for attaching the balun to a non-conducting mast for an inverted V antenna.<\/p>\n<p>This is the inner side of the protective lid with a thick foam padding which will be over the actual balun inside. Outer side of the polycarbonate weather proof housing of the balun is what you have seen initially.<\/p>\n<p>Here is the balun wound on a ferrite toroid core. Looks like the winding is with a coaxial cable with outer protective sheath removed. On the left side you have the SO 239 connected and on the right side shield and inner conductor are connected to the two antenna wire connectors inside the box. Nylon ties have been used to keep the toroid and windings in place. I will be trying out this balun only after a few days as I wish to install my EFHW first and test it.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I did not put a balun at the feedpoint of my 20 m inverted V dipole antenna as I did not have the raw materials to make one. So I bought a 1:1 Current Balun from another ham. Before installing it for my 20 m antenna, out of curiosity, I thought of having a closer [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":8326,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,19],"tags":[],"class_list":["post-8325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-ham-radio","category-antenna-and-propagation"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Close Look at a 1:1 Current Balun - Johnson&#039;s Techworld<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/johnsonfrancis.org\/techworld\/close-look-at-a-11-current-balun\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Close Look at a 1:1 Current Balun - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"I did not put a balun at the feedpoint of my 20 m inverted V dipole antenna as I did not have the raw materials to make one. So I bought a 1:1 Current Balun from another ham. 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Originally licensed as VU2JFP with Grade 1 license in 1985. Upgraded to Advanced Grade in 1988 and was allotted new callsign to VU2JO\",\"sameAs\":[\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\",\"https:\\\/\\\/www.youtube.com\\\/@johnsonstechworld\\\/\"],\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/author\\\/jf\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Close Look at a 1:1 Current Balun - Johnson&#039;s Techworld","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/johnsonfrancis.org\/techworld\/close-look-at-a-11-current-balun\/","og_locale":"en_US","og_type":"article","og_title":"Close Look at a 1:1 Current Balun - Johnson&#039;s Techworld","og_description":"I did not put a balun at the feedpoint of my 20 m inverted V dipole antenna as I did not have the raw materials to make one. 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