{"id":145,"date":"2008-05-09T05:57:23","date_gmt":"2008-05-09T09:57:23","guid":{"rendered":"http:\/\/w4kaz.com\/qth\/?p=145"},"modified":"2008-05-10T19:38:14","modified_gmt":"2008-05-10T23:38:14","slug":"hexbeam-broadbanded","status":"publish","type":"post","link":"http:\/\/w4kaz.com\/qth\/?p=145","title":{"rendered":"Hexbeam Broadbanded"},"content":{"rendered":"

I was really hopped up when I ran across the web site of G3TXQ<\/a>. I was particularly hopped up by his documentation on his hexbeam<\/a> experimentation, particularly the modified geometry broadband version<\/a>.<\/p>\n

I played around with my own experimental hexbeam for 17m\/15m\/10m, back in 2000-2001, right after I had re-licensed. There’s no magic to the antenna, but it does give one the performance of a 2 element yagi in a much smaller physical space. The hex design is right at the top of my “really interesting stuff” list. Its one of the things I corresponded with W4RNL over. ‘RNL was not a great fan of the design, but agreed that it did have its place. I’m not sure of the reason for my own illogical interest – just one of those things.<\/p>\n

But back to G3TXQ. He has taken the step of modifying the geometry of the reflector. He indicates that this change will improve the f\/b ratio and also gives a broad match that is closer to 50 ohms. The classic Hexbeam design has an impedence in the 20 to 25 ohm range. The G3TXQ version has a flat SWR across the 20m through 15m bands, and most of 10m. Way Cool. Even better, the modeling shows the best SWR and best f\/b ratio seem to happen at approximately the same frequency.<\/p>\n

I’m thinking about a 15m monoband version now. I guess its also time to go back and surf the hexbeam yahoo group again.<\/p>\n","protected":false},"excerpt":{"rendered":"

I was really hopped up when I ran across the web site of G3TXQ. I was particularly hopped up by his documentation on his hexbeam experimentation, particularly the modified geometry broadband version.<\/p>\n

I played around with my own experimental hexbeam for 17m\/15m\/10m, back in 2000-2001, right after I had re-licensed. There’s no magic to the antenna, but it does give one the performance of a 2 element yagi in a much smaller physical space. The hex design is right at the top of my “really interesting stuff” list. Its one of the things I corresponded with W4RNL over. ‘RNL was not a great fan of the design, but agreed that it did have its place. I’m not sure of the reason for my own illogical interest – just one of those things.<\/p>\n

But back to G3TXQ. He has taken the step of modifying the geometry of the reflector. He indicates that this change will improve the f\/b ratio and also gives a broad match that is closer to 50 ohms. The classic Hexbeam design has an impedence in the 20 to 25 ohm range. The G3TXQ version has a flat SWR across the 20m through 15m bands, and most of 10m. Way Cool. Even better, the modeling shows the best SWR and best f\/b ratio seem to happen at approximately the same frequency.<\/p>\n

I’m thinking about a 15m monoband version now. I guess its also time to go back and surf the hexbeam yahoo group again.<\/p>\n

[…]<\/p>\n

Continue reading Hexbeam Broadbanded<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[7,13,12,14],"tags":[],"_links":{"self":[{"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=\/wp\/v2\/posts\/145"}],"collection":[{"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=145"}],"version-history":[{"count":0,"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=\/wp\/v2\/posts\/145\/revisions"}],"wp:attachment":[{"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=145"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=145"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/w4kaz.com\/qth\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=145"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}