{"id":1934,"date":"2017-01-04T14:50:45","date_gmt":"2017-01-04T22:50:45","guid":{"rendered":"http:\/\/www.k6bj.org\/?p=1934"},"modified":"2017-03-17T00:13:31","modified_gmt":"2017-03-17T07:13:31","slug":"modulation-demodulation-software-radio","status":"publish","type":"post","link":"https:\/\/k6bj.org\/wordpress\/archives\/1934","title":{"rendered":"Modulation-Demodulation Software Radio"},"content":{"rendered":"<h4><span class=\"\" style=\"display:block;clear:both;height: 0px;margin-top: -25px;border-top-width:0px;border-bottom-width:0px;\"><\/span>Modulation-Demodulation Software Radio<\/h4>\n<p>New Year Greetings to one and all.<\/p>\n<p>Here is a section of an email note&nbsp; from a very good friend of mine in VE7 which I thought would be of interest.&nbsp; I have only scanned the QST article on MDSR but it clearly deserves close study.<br \/>\n73&nbsp; BCNU<\/p>\n<p>PS&nbsp; Next CAKE session on Jan 14<\/p>\n<p>Ron W6WO<\/p>\n<p>Ham Radio.&nbsp;&nbsp;&nbsp; Well, I find some time to play.&nbsp; Lately I have been more involved with 630 Meters.&nbsp; Listening as much as anything.&nbsp; I recently downloaded the WSJTx digital software program and find it quite fascinating.&nbsp; I mostly let the computer do the listing HI. But it is amazing what the computer can come up with.&nbsp; I rebuilt the 630 M transmitter that I use on CW and with a two IRF640\u2019s literally hooked in parallel it puts out 80 Watts in Class D-E.&nbsp; 85% efficient.&nbsp;&nbsp; When I finish building the transverter to enable me to use my Omni VI+ on 630 Meter I will be transmitting as well as receiving using digital modes.<\/p>\n<p>On Dec 22 during the night WSHTx decoded VK4YB 21 times.&nbsp; Mind you very weak.&nbsp; -23 to -29 dB below my receiver\/ant noise floor but still he is only running 5 Watts ERP and my 630 M Rx antenna is a 18 ft. vertical located in the quietest spot (up the middle of a tree) on my front lawn being the furthest distance from the neighbours house and all the RFI generating.<\/p>\n<p>There is a fascinating article in the Jan 2017 QST by VE7DXW titled:&nbsp; \u201cModulation-Demodulation Software Radio, (MDSR)&#8221;.&nbsp; What I found interesting was that monitoring the Ham Bands they have noticed different occurrences of incensed radio propagation that is easily missed by just tuning across the bands.&nbsp; I have yet to download the software MDSR group has developed but it something I intend to do in the future when I have some time.&nbsp;&nbsp; You are likely well aware of this group and maybe even a contributor?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Modulation-Demodulation Software Radio New Year Greetings to one and all. Here is a section of an email note&nbsp; from a very good friend of mine in VE7 which I thought would be of interest.&nbsp; I have only scanned the QST &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"more-link\" href=\"https:\/\/k6bj.org\/wordpress\/archives\/1934\"> <span class=\"screen-reader-text\">Modulation-Demodulation Software Radio<\/span> Read More &raquo;<\/a><\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23,40],"tags":[],"class_list":["post-1934","post","type-post","status-publish","format-standard","hentry","category-cake","category-january-2017"],"_links":{"self":[{"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/posts\/1934","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/comments?post=1934"}],"version-history":[{"count":3,"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/posts\/1934\/revisions"}],"predecessor-version":[{"id":1937,"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/posts\/1934\/revisions\/1937"}],"wp:attachment":[{"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/media?parent=1934"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/categories?post=1934"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/k6bj.org\/wordpress\/wp-json\/wp\/v2\/tags?post=1934"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}