{"id":9726,"date":"2023-10-31T10:37:00","date_gmt":"2023-10-30T23:37:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2023\/10\/31\/building-a-crystal-set-videos\/"},"modified":"2025-07-22T18:02:03","modified_gmt":"2025-07-22T08:02:03","slug":"building-a-crystal-set-videos","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2023\/10\/31\/building-a-crystal-set-videos\/","title":{"rendered":"Building a Crystal Set (Videos)"},"content":{"rendered":"<p><iframe loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\" frameborder=\"0\" height=\"247\" src=\"https:\/\/www.youtube.com\/embed\/dSUa_W-rnzk?si=mb-2Y5BMHJjM60uY?rel=0\" title=\"YouTube video player\" width=\"440\"><\/iframe><\/p>\n<div><\/div>\n<div><b>Andreas DL1AJG in Germany sent the above video to me. Andreas is the fellow who ran the course in which his university-level students <a href=\"https:\/\/soldersmoke.blogspot.com\/2023\/06\/germany-direct-conversion-receiver.html\">built direct conversion receivers<\/a>. <\/b><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b>I like the presenter&#8217;s technique. But it would have been cooler if he actually used a chunk of Galena or Iron Pyrite, with a cats whisker. (I still have some of the Iron Pyrite that Mike KL7R gave me many years ago.) I think that all radio amateurs should (as a rite of passage) actually poke a crystal with a cats whisker in search of a signal. Like here: <\/b><\/div>\n<div><\/div>\n<div><iframe loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen=\"\" frameborder=\"0\" height=\"247\" src=\"https:\/\/www.youtube.com\/embed\/p1h-Ro0qVfA?si=N1kY9AYyetf7Xs4D?rel=0\" title=\"YouTube video player\" width=\"440\"><\/iframe><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b> Thanks Andreas!<\/b><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Andreas DL1AJG in Germany sent the above video to me. Andreas is the fellow who ran the course in which his university-level students built direct conversion receivers. I like the presenter&#8217;s technique. But it would have been cooler if he actually used a chunk of Galena or Iron Pyrite, with a cats whisker. (I still &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2023\/10\/31\/building-a-crystal-set-videos\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Building a Crystal Set (Videos)&#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":[108,95,272,253],"tags":[],"class_list":["post-9726","post","type-post","status-publish","format-standard","hentry","category-crystal-radio","category-germany","category-kl7r","category-spain"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9726","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=9726"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9726\/revisions"}],"predecessor-version":[{"id":11263,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/9726\/revisions\/11263"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=9726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=9726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=9726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}