{"id":1138,"date":"2014-03-09T20:28:57","date_gmt":"2014-03-09T20:28:57","guid":{"rendered":"http:\/\/dh5ym.hopto.org\/wiki\/?p=1138"},"modified":"2014-03-11T12:57:13","modified_gmt":"2014-03-11T12:57:13","slug":"dk7zb-quadlong-for-2m","status":"publish","type":"post","link":"http:\/\/dh5ym.hopto.org\/wiki\/?p=1138","title":{"rendered":"DK7ZB Quadlong for 2m"},"content":{"rendered":"<p>Martin, DK7ZB describes a horizontal, almost omnidirectional, 2m VHF antenna. Its leightweight enough to mount it to a fiber mast.<br \/>\nIts rather easy to build and fast to mount.<br \/>\nI used 4mm brass tube for the horizontal elements and 1mm antenna wire for the vertical elements. Therefore the resonance isa  bit too high but this should not be a too big problem.<br \/>\nThe pictures show the antenna on my 10m fibre mast mounted at the balcony and the S11 measurement data (calibrated to the input of a 15m Aircel7 cable).<br \/>\n<div id=\"attachment_1139\" style=\"width: 210px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1139\" src=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-200x300.jpg\" alt=\"Quadlong for 2m\" width=\"200\" height=\"300\" class=\"size-medium wp-image-1139\" srcset=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-200x300.jpg 200w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-682x1024.jpg 682w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF.jpg 1000w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><\/a><p id=\"caption-attachment-1139\" class=\"wp-caption-text\">Quadlong for 2m<\/p><\/div><div id=\"attachment_1140\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1140\" src=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-300x162.png\" alt=\"Quadlong VHF reflection measurement\" width=\"300\" height=\"162\" class=\"size-medium wp-image-1140\" srcset=\"http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-300x162.png 300w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-1024x554.png 1024w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF-500x270.png 500w, http:\/\/dh5ym.hopto.org\/wiki\/wp-content\/uploads\/2014\/03\/Quadlong_VHF.png 1920w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-1140\" class=\"wp-caption-text\">Quadlong VHF reflection measurement<\/p><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Martin, DK7ZB describes a horizontal, almost omnidirectional, 2m VHF antenna. Its leightweight enough to mount it to a fiber mast. Its rather easy to build and fast to mount. I used 4mm brass tube for the horizontal elements and 1mm &hellip; <a href=\"http:\/\/dh5ym.hopto.org\/wiki\/?p=1138\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,22],"tags":[],"class_list":["post-1138","post","type-post","status-publish","format-standard","hentry","category-antenna","category-vhf"],"_links":{"self":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/1138","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1138"}],"version-history":[{"count":3,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions"}],"predecessor-version":[{"id":1144,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=\/wp\/v2\/posts\/1138\/revisions\/1144"}],"wp:attachment":[{"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1138"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1138"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/dh5ym.hopto.org\/wiki\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1138"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}