{"id":31,"date":"2023-05-07T09:12:41","date_gmt":"2023-05-07T14:12:41","guid":{"rendered":"https:\/\/ka9kqh.net\/?p=31"},"modified":"2024-02-15T15:49:27","modified_gmt":"2024-02-15T21:49:27","slug":"1-2-wave-dipole-lengths","status":"publish","type":"post","link":"https:\/\/ka9kqh.net\/?p=31","title":{"rendered":"1\/2 Wave Dipole Lengths"},"content":{"rendered":"\n

A 1\/2 wavelength dipole is one of the simplest antennas you can build and install. Some wire (it can even be scrap\/salvage) a few insulators, rope, and a feedline. These can be built much cheaper than purchased, a nice thing once you’ve spent several hundred bucks on the transceiver. <\/p>\n\n\n\n

468\/F<\/strong> is the formula for get the 1\/2 wavelength of a given frequency. Cutting this in half then gets you the two leg lengths that you feed in the middle for your Dipole Antenna.<\/p>\n\n\n\n

>—————–0—————–<<\/p>\n\n\n\n

\n
\n
\n
Band<\/td>Frequency
(MHz)<\/td>		1\/2 Wavelength in Ft
(Add a few inches for tuning)<\/td><\/tr>
40<\/td>7.150<\/td>65.46′<\/td><\/tr>
30<\/td>10.125<\/td>46.22′<\/td><\/tr>
20<\/td>14.175<\/td>33.00′<\/td><\/tr>
17<\/td>18.118<\/td>25.83′<\/td><\/tr>
15<\/td>21.225<\/td>22.05′<\/td><\/tr>
12<\/td>24.940<\/td>18.77′<\/td><\/tr>
10 (SSB)<\/td>28.400<\/td>16.50′<\/td><\/tr>
<\/td><\/td><\/td><\/tr><\/tbody><\/table>
Frequencies are band centers except for 10 meters which is the center of the Technician phone portion of the 10M band.<\/figcaption><\/figure>\n\n\n\n

<\/p>\n<\/div>\n<\/div>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"

A 1\/2 wavelength dipole is one of the simplest antennas you can build and install. Some wire (it can even be scrap\/salvage) a few insulators, rope, and a feedline. These can be built much cheaper than purchased, a nice thing once you’ve spent several hundred bucks on the transceiver. <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"powered_cache_disable_cache":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-31","post","type-post","status-publish","format-standard","hentry","category-antennas"],"_links":{"self":[{"href":"https:\/\/ka9kqh.net\/index.php?rest_route=\/wp\/v2\/posts\/31","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ka9kqh.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ka9kqh.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ka9kqh.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ka9kqh.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=31"}],"version-history":[{"count":0,"href":"https:\/\/ka9kqh.net\/index.php?rest_route=\/wp\/v2\/posts\/31\/revisions"}],"wp:attachment":[{"href":"https:\/\/ka9kqh.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ka9kqh.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ka9kqh.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}