{"id":1054,"date":"2016-03-29T09:58:27","date_gmt":"2016-03-29T08:58:27","guid":{"rendered":"http:\/\/www.chatteris.biz\/blog\/?p=1054"},"modified":"2022-04-06T13:27:43","modified_gmt":"2022-04-06T12:27:43","slug":"4m-dipole-finally-fitted","status":"publish","type":"post","link":"https:\/\/www.chatteris.biz\/blog\/4m-dipole-finally-fitted\/","title":{"rendered":"4m band dipole finally fitted"},"content":{"rendered":"<p>My local area has quite an active 4m band, and recently Andy (<a href=\"http:\/\/www.qrz.com\/db\/G6OHM\" target=\"_blank\" rel=\"noopener\">G6OHM<\/a>) has gained an NoV for a 4m simplex parrot which is working well.<\/p>\n<p>Kevin (<a href=\"http:\/\/www.qrz.com\/db\/2E0OPU\" target=\"_blank\" rel=\"noopener\">2E0OPU<\/a>) kindly gave me a 4m band dipole as he knew I had an Icom 7100 and no antenna, so I finally got round to installing it.<\/p>\n<p>I did a temporary setup at ground level and got the VSWR to 1.0:1, mounting the antenna in it&#8217;s fixed location would not allow me to get the VSWR below 1.6:1 (this would give me a reflected power of 5.3%).<\/p>\n<p>The cause of this problem was the close proximity of my mast, extending the dipole 300mm past this structure solved the problem.<\/p>\n<p><a href=\"http:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.23.49-Medium.jpg\" rel=\"attachment wp-att-1053\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-1053\" src=\"http:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.23.49-Medium-225x300.jpg\" alt=\"2016-03-29 09.23.49 (Medium)\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.23.49-Medium-225x300.jpg 225w, https:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.23.49-Medium.jpg 576w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><\/p>\n<p>The dipole is horizontal for an SSB contest at the moment, I have used a stand off sleeve which the dipoles supporting tube slides into, this allows me to retract the dipole for fine tuning, a self tapping screw is used to hold the dipole either horizontally or vertically.<\/p>\n<p>The bracket for the dipole was their before the mast, hence in the horizontal plane, the dipole it is across the mast stopping it from tilting for maintenance, as I have to get up the ladder to pull the mast top securing pin, it&#8217;s no big deal as I will move the dipole out of the way at the same time.<\/p>\n<p>The VSWR is 1.0:1 or as near as damn it!<\/p>\n<p><a href=\"http:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.11.03-Medium-e1459240080850.jpg\" rel=\"attachment wp-att-1052\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-1052\" src=\"http:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.11.03-Medium-e1459240080850-225x300.jpg\" alt=\"2016-03-29 09.11.03 (Medium)\" width=\"225\" height=\"300\" srcset=\"https:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.11.03-Medium-e1459240080850-225x300.jpg 225w, https:\/\/www.chatteris.biz\/blog\/wp-content\/uploads\/2016\/03\/2016-03-29-09.11.03-Medium-e1459240080850.jpg 768w\" sizes=\"auto, (max-width: 225px) 100vw, 225px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>My local area has quite an active 4m band, and recently Andy (G6OHM) has gained an NoV for a 4m simplex parrot which is working well. Kevin (2E0OPU) kindly gave me a 4m band dipole as he knew I had an Icom 7100 and no antenna, so I finally got round to installing it. I &hellip; <a href=\"https:\/\/www.chatteris.biz\/blog\/4m-dipole-finally-fitted\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">4m band dipole finally fitted<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[3],"tags":[206,207],"class_list":["post-1054","post","type-post","status-publish","format-standard","hentry","category-radio-ham","tag-4-meter-band","tag-4m-dipole"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>4m band dipole finally fitted - My Blog<\/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:\/\/www.chatteris.biz\/blog\/4m-dipole-finally-fitted\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"4m band dipole finally fitted - My Blog\" \/>\n<meta property=\"og:description\" content=\"My local area has quite an active 4m band, and recently Andy (G6OHM) has gained an NoV for a 4m simplex parrot which is working well. Kevin (2E0OPU) kindly gave me a 4m band dipole as he knew I had an Icom 7100 and no antenna, so I finally got round to installing it. 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