{"id":1399,"date":"2018-12-02T11:36:11","date_gmt":"2018-12-02T10:36:11","guid":{"rendered":"http:\/\/www.sm0brf.se\/?p=1399"},"modified":"2018-12-02T11:43:25","modified_gmt":"2018-12-02T10:43:25","slug":"what-is-e-i-r-p","status":"publish","type":"post","link":"https:\/\/www.sm0brf.se\/?p=1399","title":{"rendered":"What is e.i.r.p."},"content":{"rendered":"<p>Effective Isotropic Radiated Power (e.i.r.p). What is it?<\/p>\n<p>e.i.r.p. = Pout (from TX) \u2013 losses (in antenna and feeder etc) in dB + antenna gain in dBi.<\/p>\n<p>The regulations for 5 MHz in Sweden with max 15 W e.i.r.p. will have some strange consequences:<\/p>\n<p>An inverted vee dipole with apex at 13 m has a gain of 6.7 dBi. If losses in tuner and feedline amount to 1 dB, Pout should be 5.7 dBs lower than 15 W or 4 W. It holds for an antenna over even ground with average conductivity.<\/p>\n<p>For a vertical \u00bc wave GP with 2 to 4 radials at 2 m Pout max is rather 30W.<\/p>\n<p>Click on the image for a better view.<\/p>\n<p>Inv vee dipole at right angle to the antenna plane:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Vertical:<\/p>\n<p><a href=\"https:\/\/www.sm0brf.se\/wp-content\/uploads\/2018\/12\/diagrams.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1402\" src=\"https:\/\/www.sm0brf.se\/wp-content\/uploads\/2018\/12\/diagrams-300x96.jpg\" alt=\"\" width=\"700\" height=\"224\" srcset=\"https:\/\/www.sm0brf.se\/wp-content\/uploads\/2018\/12\/diagrams-300x96.jpg 300w, https:\/\/www.sm0brf.se\/wp-content\/uploads\/2018\/12\/diagrams-768x245.jpg 768w, https:\/\/www.sm0brf.se\/wp-content\/uploads\/2018\/12\/diagrams-624x199.jpg 624w, https:\/\/www.sm0brf.se\/wp-content\/uploads\/2018\/12\/diagrams.jpg 993w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Effective Isotropic Radiated Power (e.i.r.p). What is it? e.i.r.p. = Pout (from TX) \u2013 losses (in antenna and feeder etc) in dB + antenna gain in dBi. The regulations for 5 MHz in Sweden with max 15 W e.i.r.p. will have some strange consequences: An inverted vee dipole with apex at 13 m has a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-1399","post","type-post","status-publish","format-standard","hentry","category-okategoriserade-en"],"_links":{"self":[{"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=\/wp\/v2\/posts\/1399","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1399"}],"version-history":[{"count":3,"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=\/wp\/v2\/posts\/1399\/revisions"}],"predecessor-version":[{"id":1404,"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=\/wp\/v2\/posts\/1399\/revisions\/1404"}],"wp:attachment":[{"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1399"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1399"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sm0brf.se\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1399"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}