![](\"http:\/\/folk.uio.no\/sverre\/LDE\/r-R3.jpg\")
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Several people have e-mailed me suggesting that the weird echo I have been hearing on shortwave broadcast stations is in fact one of the fabled “Long Delayed Echoes” that radio amateurs have been hearing intermittently since about 1927. I was skeptical at first, but — at least in the case of the Radio China signal — I think LDE caused by the signal going around the globe several times does explain what I’ve heard. Each trip would add a delay of about .133 seconds, and that seems to match what we hear in my recording: <\/b> Our book: “SolderSmoke — Global Adventures in Wireless Electronics” http:\/\/soldersmoke.com\/book.htm<\/a> Our coffee mugs, T-Shirts, bumper stickers: http:\/\/www.cafepress.com\/SolderSmoke<\/a> Our Book Store: http:\/\/astore.amazon.com\/contracross-20<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" Several people have e-mailed me suggesting that the weird echo I have been hearing on shortwave broadcast stations is in fact one of the fabled “Long Delayed Echoes” that radio amateurs have been hearing intermittently since about 1927. I was skeptical at first, but — at least in the case of the Radio China signal … Continue reading “Long Delayed Echo on Radio China International”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,281,27,203],"tags":[],"class_list":["post-1430","post","type-post","status-publish","format-standard","hentry","category-china","category-long-delayed-echo","category-propagation","category-regen"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1430","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=1430"}],"version-history":[{"count":0,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/1430\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=1430"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=1430"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=1430"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
<\/b> http:\/\/soldersmoke.blogspot.com\/2014\/08\/strange-echo-on-china-radio.html <\/b><\/a>
<\/b> Compare that with what K9FIK recorded on 10 meter SSB (thanks Stephen!): <\/b>
<\/b> http:\/\/swling.com\/blog\/2013\/10\/hearing-the-speed-of-light-dx-double-echo\/<\/b><\/a>
(you can listen to the audio on this one). <\/b>
<\/b> It sounds very similar. <\/b>
<\/b> If this is in fact LDE, I’m lucky — this is pretty rare. And it is a eerie that I first heard it on on Regen receiver from the 1920s! Above is a picture of the regen used to study the FIRST LDEs. See: http:\/\/folk.uio.no\/sverre\/LDE\/<\/a><\/b><\/p>\n