I just finished reading Eric Nichol’s (KL7AJ) book titled Radio Science for the Radio Amateur, in which LDEs and other non-linear propagation events are discussed (ch. 11). Eric considers some of the proposed explanations but concludes that none of them really work. I heard it myself once on HF, during the sunspot peak many years ago. As I remember it, the delay was about 1 to 2 seconds. Truly spooky.
Ted, KN1CBR >Message: 18 >Date: Thu, 26 Nov 2015 19:54:40 -0800 >From: Jack Brindle <[email protected]> >To: [email protected] >Subject: Re: [Elecraft] P3 Showing Transmit Signal >Message-ID: <[email protected]> >Content-Type: text/plain; charset=utf-8 > >That would be from me? Amazingly, this was on 80 meters, and was heard >all over the bay area up into central CA. At times the ?echo? was louder >than the direct signal! >There are at least two recordings from that event. Very strange, and >extremely interesting. While it was ongoing, both 40 and 80 were open >across NA. When it stopped, >40 collapsed to the point where the only signal heard was VY1AAA, and 80 >became only local. In 40+ years of hamming, this is the first time I have >experienced anything like that. >I have to say, it was also very cool to experience. > >73, >Jack, W6FB > >> On Nov 25, 2015, at 11:38 PM, Bill Frantz <[email protected]> wrote: >> >> We had a report at the November West Valley Amateur Radio Association >>meeting of one member who experienced "echos" from his own CW >>transmissions during Sweepstakes on November 7-8. He verified by >>listening to another nearby station that the echo was 1/7 second later, >>the time for a radio signal to go around the world. The K3's full break >>in allowed him to hear himself between the morse code units. >> >> 73 Bill AE6JV >> >> On 11/26/15 at 10:25 PM, [email protected] (Andras ARATO) >>wrote: >> >>> I could see this these days, but it was my signal coming back from >>>around the Earth when transmitting on 21 MHz. It was a good propagation >>>with K=1 and SFI=121. I could hear it too. >>> >>> 73! de HA4AA Andras >> >> ----------------------------------------------------------------------- >> Bill Frantz | Truth and love must prevail | Periwinkle >> (408)356-8506 | over lies and hate. | 16345 Englewood Ave >> www.pwpconsult.com | - Vaclav Havel | Los Gatos, CA 95032 >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
