{"id":13135,"date":"2018-11-19T16:07:44","date_gmt":"2018-11-20T00:07:44","guid":{"rendered":"http:\/\/rustybolt.info\/wordpress\/?p=13135"},"modified":"2019-12-26T16:08:07","modified_gmt":"2019-12-27T00:08:07","slug":"2018-11-19-depth-of-loop-antenna","status":"publish","type":"post","link":"https:\/\/rustybolt.info\/wordpress\/?p=13135","title":{"rendered":"2018-11-19 Depth of Loop Antenna"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">from FB group Building Transistor Radios 2018-11-19<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I shared my loop antenna \u2013 see photo, and it is somewhat 2 \ndimensional. The arms are 762mm across but the depth of the windings is \nonly about 35 mm. Compare that to the ferrite loopstick at the other \nextreme, it\u2019s 10 mm diameter but 100 mm long. I\u2019ve noticed that the \nloopsticks are quite directional, I can null out a strong station \neffectively.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">I was thinking that if I wound another loop antenna using a square \ncardboard box, I could cut the box down so the windings have little \ndepth, only 50 mm or 2 inches. This gives a wide \u2018figure eight\u2019 pattern \nwith minimal directionality. But should I wind the coil over a deeper \nbox, about the same depth as the width or length? This would give a \nnarrower figure eight pattern with more directionality.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This would take more wire, because spreading the windings over a \nwider area gives less inductance so more turns will be needed to get the\n same inductance. Would it be worth doing this to get a narrower \npattern? The loop antenna would be bulkier, taking up more room.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" src=\"https:\/\/rustybolt.info\/wordpress\/wp-content\/uploads\/2018\/11\/IMG_20181117_1321472.jpg\" alt=\"\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>from FB group Building Transistor Radios 2018-11-19 I shared my loop antenna \u2013 see photo, and it is somewhat 2 dimensional. The arms are 762mm across but the depth of the windings is only about 35 mm. Compare that to the ferrite loopstick at the other extreme, it\u2019s 10 mm diameter but 100 mm long.<a href=\"https:\/\/rustybolt.info\/wordpress\/?p=13135\"> <\/p>\n<p> (Read More&#8230;)<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-13135","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/13135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=13135"}],"version-history":[{"count":1,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/13135\/revisions"}],"predecessor-version":[{"id":13136,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/13135\/revisions\/13136"}],"wp:attachment":[{"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=13135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=13135"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rustybolt.info\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=13135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}