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Sounds like a repetitive first four notes of the original Dr. Who. intro (1963). Along with the waterfall display, it makes it even more disconcerting. Especially the center line. On Mon, Dec 17, 2018 at 12:52 PM Curt Rowlett <labyrinththirt...@gmail.com> wrote: > Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from > this list > > Hello Group: > > I was transmitting Digital SSTV on the 40 meter band last Saturday morning > when I spotted a strange signal in the waterfall of the Web SDR that I was > running on my Chrome browser (I always keep an SDR open as I'm transmitting > as I like to watch the images appear on the waterfall as I am sending > them). > > I'm not sure if I was tuned to the proper frequency or not, and I tried > both USB and LSB. I suspect that this is likely someone doing a radio test > of some kind. Tuned via the Web SDR located in Newport, Oregon, USA. > > Video of the signal here: https://youtu.be/rxTn0P8lsrA > > As can be seen on the UTC widget running at the top right of the video > screen, I first noticed this signal at approximately 1715 UTC, Saturday, > December 15, 2018. > > I've posted about this video on the HF Underground website under the > section for "HF Mystery Signals" which can be read here: > https://www.hfunderground.com/board/index.php/topic,48985.0.html > > So far, I've had others try to guess what this signal is. I originally > thought that it was someone else sending out Digital SSTV waterfall images, > but after tuning to the signal, I quickly realized that was not the case. > So far, others have suggested RFI from some source, such as a home > appliance (washing machine) to some sort of timer set for a mechanical pump > to the Feld Hell digital mode (which I don't believe is the case) to > something possibly like the HAARP transmissions. > > I personally suspect that this was likely some sort of test being run by a > radio amateur. I base my opinion on the fact that the signal was located in > the area set aside on the 40m amateur band for the United States, > specifically for sending/receiving digital modes of all types. The signal > only transmitted for the length of time of up to and over 10 minutes in the > video that I recorded. I monitored the signal for the rest of the day and > it only transmitted sporadically after that, and then only five or six > cycles of the signal were sent (timing them you can see that each cycle is > a roughly six second transmission with a pause of about two seconds > between) and then it would stop again, often for hours. It did, however, > continue to sporadically transmit for the rest of the day and evening. > > Also, at one point during the day on Saturday, I opened up three separate > Web SDRs, all tuned to the same signal. One SDR was located in Newport, > Oregon, USA (the SDR on which I originally spotted the signal and which is > the one you see in the video), another was in Weiser, Idaho, and the third > was in Sunnyvale, California. When the strange signal began transmitting > again on the Oregon SDR, I noticed that the signal was *not* appearing on > the other two SDRs. Not the greatest feat of triangulation, but it did lead > me to believe that the signal was likely originating in or very close to > the State of Oregon. > > This may be nothing but a one-off anomaly of some sort. But this video has > generated a lot of interest on my YouTube channel and I wanted to ask you > pros what your opinions are. > > Thanks and Happy Holidays to all, > > Curt Rowlett / W9SPY > Seattle, Washington USA > http://labyrinth13.com > ______________________________________________________________ > Spooks mailing list > Home: http://mailman.qth.net/mailman/listinfo/spooks > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Spooks@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Tracy Johnson Old fashioned text games hosted below: http://empire.openmpe.com/empire/ BT NNNN ______________________________________________________________ Spooks mailing list Home: http://mailman.qth.net/mailman/listinfo/spooks Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Spooks@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
