{"id":263,"date":"2011-08-21T12:01:21","date_gmt":"2011-08-21T19:01:21","guid":{"rendered":"http:\/\/www.cchsu.com\/art-en\/?p=263"},"modified":"2011-08-21T12:01:21","modified_gmt":"2011-08-21T19:01:21","slug":"antennas-again","status":"publish","type":"post","link":"https:\/\/www.cchsu.com\/art-en\/2011\/08\/21\/263\/","title":{"rendered":"Antennas &#8230; Again"},"content":{"rendered":"<p>I spotted a commercial version of my <a href=\"http:\/\/www.cchsu.com\/art-en\/2009\/09\/19\/213\/\" title=\"DIY HDTV Antenna\" target=\"_blank\">DIY HDTV antenna<\/a> in Costco.  You can also find it in Target&#8217;s web site.  It&#8217;s called ClearStream.  What I saw is the <a href=\"http:\/\/www.antennasdirect.com\/store\/clearstream-antennas.html?_s_ref=Esud78zkS&#038;kw=%22ClearStream%20antenna%22&#038;creative=9045191239&#038;gclid=CMTZr9CH4aoCFagbQgod5kli6Q\" target=\"_blank\">C2 version<\/a> that has only two rings.<\/p>\n<p>The C4 version is actually parallel-connected Doppler ring pairs, while my version is series-connected.  The main difference between series-connected and parallel-connected version is the beam angle.  The series-connected Doppler rings will have narrower beam angle and theoretically stronger signal.<\/p>\n<p>Both ClearStream C2 and C4 feature reflector mesh (that will make their gain boost quite a bit) and commercial grade packaging.  I did not see any guiding ring in the design, which I think it should have.  They did not have in-antenna preamplifier, what a pity!  The size of these antennas are perfect fit to be mounted in attic and leverage existing house wiring.<\/p>\n<p>To mount these antennas outdoor will require a real pro that helps with proper grounding (so that it won&#8217;t be fried under thunderstorm).  I personally won&#8217;t do that since Californian sun is the most corrosive source for anything that has plastics.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Doppler ring antennas strike back!<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/posts\/263"}],"collection":[{"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/comments?post=263"}],"version-history":[{"count":1,"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/posts\/263\/revisions"}],"predecessor-version":[{"id":264,"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/posts\/263\/revisions\/264"}],"wp:attachment":[{"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/media?parent=263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/categories?post=263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cchsu.com\/art-en\/wp-json\/wp\/v2\/tags?post=263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}