{"id":9597,"date":"2025-02-09T15:45:00","date_gmt":"2025-02-09T04:45:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2025\/02\/09\/light-beam-communication-from-the-dominican-republic\/"},"modified":"2025-07-22T18:00:59","modified_gmt":"2025-07-22T08:00:59","slug":"light-beam-communication-from-the-dominican-republic","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2025\/02\/09\/light-beam-communication-from-the-dominican-republic\/","title":{"rendered":"Light Beam Communication from the Dominican Republic?"},"content":{"rendered":"<p><iframe loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\" frameborder=\"0\" height=\"815\" referrerpolicy=\"strict-origin-when-cross-origin\" src=\"https:\/\/www.youtube.com\/embed\/IZoVMYje1ec?rel=0\" title=\"Beacon Green Light from 1\/4 mile.\" width=\"458\"><\/iframe><\/p>\n<div><\/div>\n<div><b>Mike WN2A sent me the PIC board to generate the CW for my &#8220;Lil Slugger&#8221; Doug DeMaw transmitter. Then I started wondering about having a light source flash with the CW. Mike recommended some super-bright green LED&#8217;s. I had a big broken flashlight with me (the benefits of junk!) so I put all the parts together and hung the light in the window of my seventh floor shack. Last night as Elisa and I walked the dog, I looked back from a quarter mile south. The video above shows the scene. The cell phone camera understates the brightness. <\/b><\/div>\n<div><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><object class=\"BLOG_video_class\" contentid=\"7cf3b80588827c80\" height=\"266\" id=\"BLOG_video-7cf3b80588827c80\" width=\"320\"><\/object><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: center;\"><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><b>The video above shows the rig in action (but with the bulb on the shelf). Note the PLJ freq readout, the SWR meter and, of course, the green bulb. <\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><b><br \/><\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><b>I half joked with Elisa that I would love to get a reception report on the light beam. This is not all that far-fetched. We have an email address in the CW message, and the light beam is aimed to the south, across the open Caribbean. <\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><b><br \/><\/b><\/div>\n<div class=\"separator\" style=\"clear: both; text-align: left;\"><b>All of this reminded me of an article by Rod Newkirk of some light beam communication that he engaged in in Indonesia during World War II. Great story: <\/b><\/div>\n<p><\/p>\n<div><a href=\"https:\/\/soldersmoke.blogspot.com\/2024\/05\/a-light-beam-qso-in-hollandia-christmas.html\"><b>https:\/\/soldersmoke.blogspot.com\/2024\/05\/a-light-beam-qso-in-hollandia-christmas.html<\/b><\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Mike WN2A sent me the PIC board to generate the CW for my &#8220;Lil Slugger&#8221; Doug DeMaw transmitter. Then I started wondering about having a light source flash with the CW. Mike recommended some super-bright green LED&#8217;s. I had a big broken flashlight with me (the benefits of junk!) so I put all the parts &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2025\/02\/09\/light-beam-communication-from-the-dominican-republic\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Light Beam Communication from the Dominican Republic?&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,19,218,249,240,524],"tags":[],"class_list":["post-9597","post","type-post","status-publish","format-standard","hentry","category-demaw-doug","category-dominican-republic","category-indonesia","category-led","category-light-beam-telephony","category-wn2a"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9597","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=9597"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9597\/revisions"}],"predecessor-version":[{"id":11152,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9597\/revisions\/11152"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9597"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9597"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9597"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}