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 Previous: The Amateur Radio Crossword Puzzler |  Next: The K7RA Solar Update |
By Stan Horzepa, WA1LOU
Contributing Editor
July 06, 2007
This week’s installment of Surfin’ is not a long-delayed echo of a Halloween 2003 installment of Surfin’.
Long-delayed echoes (LDEs) have always fascinated me. I was familiar with LDEs before I was familiar with Amateur Radio having read about them in paperbacks way back in my grammar school days. I cannot recall for sure, but I likely read about LDEs in one of those Ripley’s Believe It or Not paperback collections that I devoured as a kid, or in one of Frank Edwards’ Stranger Than… books.
Though LDEs have been around for a while, there is not much information about them in existence, including on the Internet. My Halloween 2003 installment of Surfin’ summarized just about all that there was on the subject on the net at that time. Since then, some new information has surfaced. Let me bring you up to date with two new Internet references to our radio ghosts.
Sverre Holm, a professor of signal processing at the Centre for Imaging, Department of Informatics, University of Oslo, has studied LDEs. He presented his findings on his mystical delayed radio signals received in Oslo.
For an historic perspective of LDEs, read what Bill Continelli, W2XOY, wrote in installment #31 of “The History of Amateur Radio” on www.ham-shack.com.
Until next time, keep on surfin’.
Editor’s note: Believe it or not, Stan Horzepa, WA1LOU, prefers non-fiction to fiction because the truth is stranger than fiction. To communicate with Stan, send him an e-mail or add comments to his blog. By the way, every installment of Surfin’ is indexed here, so go look it up (whatever it may be).
| Previous: The Amateur Radio Crossword Puzzler | Next: The K7RA Solar Update |
