{"id":11798,"date":"2024-11-13T08:53:50","date_gmt":"2024-11-13T03:23:50","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=11798"},"modified":"2024-11-13T08:53:52","modified_gmt":"2024-11-13T03:23:52","slug":"sudden-hi-swr-display-why","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/sudden-hi-swr-display-why\/","title":{"rendered":"Sudden \u2018HI SWR\u2019 Display, Why?"},"content":{"rendered":"<p><iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/B9YW-riEW68?si=Lm8YqWt1ZajA7qJE\" 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><br \/>\nYesterday I was trying to check in to AIRNET India at 7.30 pm and I could hear the net control very strong, at 5,9+20 dB. Pressed the PTT to announce my callsign when the call for any more check-ins came through. Immediately &#8216;HI SWR&#8217; was displayed in the meter in red colour and there was no output from the radio. Tried tuning with built-in auto tuner of FT-710 and the tuner refused to tune. Switched to 21 MHz and tried auto tuning and it did tune to one frequency. I was confused and went outside to check the antenna. As it was dark, I first checked the portion of the antenna wire and mast from the front side and it seemed OK. At second thought, I went on to the first floor terrace and checked and there it was, the other limb of the 40m dipole was down! The nylon thread which had been used to tie the antenna had given way. So the lesson is, whenever you see a &#8216;HI SWR&#8217; display on your screen with a previously functioning antenna, go out and check the antenna in full.<\/p>\n<p>Waited till today morning, though I was quite eager to have my 40m antenna up, as I did not want to go the backyard at night with mosquitoes and possibly even little snakes!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Yesterday I was trying to check in to AIRNET India at 7.30 pm and I could hear the net control very strong, at 5,9+20 dB. Pressed the PTT to announce my callsign when the call for any more check-ins came through. Immediately &#8216;HI SWR&#8217; was displayed in the meter in red colour and there was [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":11800,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-11798","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>Sudden \u2018HI SWR\u2019 Display, Why? - 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\/sudden-hi-swr-display-why\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Sudden \u2018HI SWR\u2019 Display, Why? - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"Yesterday I was trying to check in to AIRNET India at 7.30 pm and I could hear the net control very strong, at 5,9+20 dB. 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