{"id":14084,"date":"2025-05-03T13:59:36","date_gmt":"2025-05-03T08:29:36","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=14084"},"modified":"2025-05-03T13:59:38","modified_gmt":"2025-05-03T08:29:38","slug":"can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/","title":{"rendered":"Can you guess whether the antenna elements have to be extended or trimmed?"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/H5BHIw0jZco?si=Ih9TiolafeRM_87B\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n<p class=\"wp-block-paragraph\">This is the reading from ATU-100 antenna tuner when 40m antenna was tuned for resonance using the external antenna tuner. It is displaying the capacitance value and inductance value added during the automatic tunic process. The display also shows the power input to the tuner, power output to the antenna, efficiency and SWR after tuning. Can you guess whether the antenna elements have to be extended or trimmed to get resonance without the antenna tuner?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is the reading from ATU-100 antenna tuner when 40m antenna was tuned for resonance using the external antenna tuner. It is displaying the capacitance value and inductance value added during the automatic tunic process. The display also shows the power input to the tuner, power output to the antenna, efficiency and SWR after tuning. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":14085,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-14084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-ham-radio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Can you guess whether the antenna elements have to be extended or trimmed? - 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\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Can you guess whether the antenna elements have to be extended or trimmed? - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"This is the reading from ATU-100 antenna tuner when 40m antenna was tuned for resonance using the external antenna tuner. It is displaying the capacitance value and inductance value added during the automatic tunic process. The display also shows the power input to the tuner, power output to the antenna, efficiency and SWR after tuning. [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/\" \/>\n<meta property=\"og:site_name\" content=\"Johnson&#039;s Techworld\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-03T08:29:36+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-03T08:29:38+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/05\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1205\" \/>\n\t<meta property=\"og:image:height\" content=\"675\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"headline\":\"Can you guess whether the antenna elements have to be extended or trimmed?\",\"datePublished\":\"2025-05-03T08:29:36+00:00\",\"dateModified\":\"2025-05-03T08:29:38+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/\"},\"wordCount\":88,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg\",\"articleSection\":[\"Amateur Radio (Ham Radio)\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/\",\"name\":\"Can you guess whether the antenna elements have to be extended or trimmed? - Johnson&#039;s Techworld\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg\",\"datePublished\":\"2025-05-03T08:29:36+00:00\",\"dateModified\":\"2025-05-03T08:29:38+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#primaryimage\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg\",\"contentUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/05\\\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg\",\"width\":1205,\"height\":675},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Can you guess whether the antenna elements have to be extended or trimmed?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#website\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/\",\"name\":\"Johnson's Techworld\",\"description\":\"Johnson&#039;s Techworld\",\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\",\"name\":\"Johnson Francis\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/channels4_profile.jpg\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/channels4_profile.jpg\",\"contentUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/channels4_profile.jpg\",\"width\":600,\"height\":600,\"caption\":\"Johnson Francis\"},\"logo\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2025\\\/01\\\/channels4_profile.jpg\"},\"description\":\"Amateur Radio Operator VU2JO. 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":"Can you guess whether the antenna elements have to be extended or trimmed? - 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\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/","og_locale":"en_US","og_type":"article","og_title":"Can you guess whether the antenna elements have to be extended or trimmed? - Johnson&#039;s Techworld","og_description":"This is the reading from ATU-100 antenna tuner when 40m antenna was tuned for resonance using the external antenna tuner. It is displaying the capacitance value and inductance value added during the automatic tunic process. The display also shows the power input to the tuner, power output to the antenna, efficiency and SWR after tuning. [&hellip;]","og_url":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/","og_site_name":"Johnson&#039;s Techworld","article_published_time":"2025-05-03T08:29:36+00:00","article_modified_time":"2025-05-03T08:29:38+00:00","og_image":[{"width":1205,"height":675,"url":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/05\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg","type":"image\/jpeg"}],"author":"Johnson Francis","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Johnson Francis","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#article","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/"},"author":{"name":"Johnson Francis","@id":"https:\/\/johnsonfrancis.org\/techworld\/#\/schema\/person\/6201c843e80ccd3578e6196b1d007027"},"headline":"Can you guess whether the antenna elements have to be extended or trimmed?","datePublished":"2025-05-03T08:29:36+00:00","dateModified":"2025-05-03T08:29:38+00:00","mainEntityOfPage":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/"},"wordCount":88,"publisher":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/#\/schema\/person\/6201c843e80ccd3578e6196b1d007027"},"image":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#primaryimage"},"thumbnailUrl":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/05\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg","articleSection":["Amateur Radio (Ham Radio)"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/","url":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/","name":"Can you guess whether the antenna elements have to be extended or trimmed? - Johnson&#039;s Techworld","isPartOf":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/#website"},"primaryImageOfPage":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#primaryimage"},"image":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#primaryimage"},"thumbnailUrl":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/05\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg","datePublished":"2025-05-03T08:29:36+00:00","dateModified":"2025-05-03T08:29:38+00:00","breadcrumb":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#primaryimage","url":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/05\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg","contentUrl":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/05\/Can-you-guess-whether-the-antenna-elements-must-be-extended-or-trimmed.jpg","width":1205,"height":675},{"@type":"BreadcrumbList","@id":"https:\/\/johnsonfrancis.org\/techworld\/can-you-guess-whether-the-antenna-elements-have-to-be-extended-or-trimmed\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/johnsonfrancis.org\/techworld\/"},{"@type":"ListItem","position":2,"name":"Can you guess whether the antenna elements have to be extended or trimmed?"}]},{"@type":"WebSite","@id":"https:\/\/johnsonfrancis.org\/techworld\/#website","url":"https:\/\/johnsonfrancis.org\/techworld\/","name":"Johnson's Techworld","description":"Johnson&#039;s Techworld","publisher":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/#\/schema\/person\/6201c843e80ccd3578e6196b1d007027"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/johnsonfrancis.org\/techworld\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/johnsonfrancis.org\/techworld\/#\/schema\/person\/6201c843e80ccd3578e6196b1d007027","name":"Johnson Francis","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/01\/channels4_profile.jpg","url":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/01\/channels4_profile.jpg","contentUrl":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/01\/channels4_profile.jpg","width":600,"height":600,"caption":"Johnson Francis"},"logo":{"@id":"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2025\/01\/channels4_profile.jpg"},"description":"Amateur Radio Operator VU2JO. 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\/"}]}},"_links":{"self":[{"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/posts\/14084","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/comments?post=14084"}],"version-history":[{"count":1,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/posts\/14084\/revisions"}],"predecessor-version":[{"id":14086,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/posts\/14084\/revisions\/14086"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/media\/14085"}],"wp:attachment":[{"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/media?parent=14084"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/categories?post=14084"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/johnsonfrancis.org\/techworld\/wp-json\/wp\/v2\/tags?post=14084"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}