Hello Frits, Interesting. A little different than what I heard - but of course depends on the bandwidth somewhat.
How many dB was this up from the noise floor? Or - what is the signal level of the received signal? What modulation did you try to decode or did you just set it wide-AM? I saw something like I mentioned around 1.915 MHz. It then dropped down to around 1.913 MHz - and then it went away. I did make a recording - but I didn't get the best part due to the signal moving down a bit - from 1.915 to 1.913 MHz. Thanks, John AJ6BC On Mon, Dec 8, 2014 at 6:22 AM, Frister <[email protected]> wrote: > Recorded last night. Audio bandwidth is a few kHz, but as mentioned before > the signal is about 20 kHz wide. > > https://www.dropbox.com/s/bnp8zcpgw86l6ww/1910.wav?dl=0 > > This morning (14:21 UTC) nothing is heard > > Frits W1FVB > Whitefield, NH > > On 12/8/14, John C. Westmoreland, P.E. <[email protected]> > wrote: > > Hello, > > > > Can someone please post a *.wav file of what it sounds like provided you > > have an SDR set-up? > > > > If you need someplace to post - please send the file to me offlist and > I'll > > put it on either an ftp site or http. > > > > I am not so convinced what I saw wasn't noise or some stations from China > > transmitting - which I have seen in the 160m band lately. > > I got an AM band tonight also that was stomping all over ~ 3.87 MHz. > > > > Thanks! > > John > > AJ6BC > > > > > > On Mon, Dec 8, 2014 at 2:30 AM, Graham <[email protected]> wrote: > > > >> Radiolocation may be a bit misleading. > >> > >> Some first thought that this was CODAR but it is not, at least not what > I > >> am familiar with but it may be another variation of an ocean surface > wave > >> RADAR type of system but it is certainly not like one I have heard > >> before. > >> > >> cheers, Graham ve3gtc > >> > >> > >> On 2014-12-07 20:03, paul swed wrote: > >> > >>> Not aware of any testing plus it makes no sense these days. LORAN long > >>> ago > >>> abandoned and was in that range and Loran C in the US dead. UrsaNav has > >>> been quite for quite a while. > >>> Regards > >>> Paul > >>> WB8TSL > >>> > >>> On Sun, Dec 7, 2014 at 7:09 PM, Bob Camp <[email protected]> wrote: > >>> > >>> Hi > >>>> > >>>> 120 Hz sub structure suggests a (much lower power) switching power > >>>> supply > >>>> run amok. I certainly would not design a system that would have > >>>> virtually > >>>> no immunity to power line noise ..... > >>>> > >>>> Bob > >>>> > >>>> On Dec 7, 2014, at 6:28 PM, Tim Shoppa <[email protected]> wrote: > >>>>> > >>>>> Would any time-nuts know of radiolocation-type testing going on, on > >>>>> east > >>>>> coast of US, maybe around Maine? There is a very strong wideband > >>>>> signal > >>>>> > >>>> on > >>>> > >>>>> 1900-1920kHz, with a 120Hz substructure and a 4Hz rep-rate, likely > >>>>> > >>>> megawatt > >>>> > >>>>> power range. > >>>>> > >>>>> Sound sample (recorded with 2400Hz receiver bandwidth, although the > >>>>> whole > >>>>> signal is far far wider bandwidth) at > >>>>> http://www.trailing-edge.com/1910-intruder.wav > >>>>> > >>>>> Pics of the waveform at http://www.trailing-edge.com/ > >>>>> 1910-intruder-1.png > >>>>> > >>>> and > >>>> > >>>>> zoomed in at http://www.trailing-edge.com/1910-intruder-2.png > >>>>> > >>>>> Tim N3QE > >>>>> _______________________________________________ > >>>>> time-nuts mailing list -- [email protected] > >>>>> To unsubscribe, go to > >>>>> > >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >>>> > >>>>> and follow the instructions there. > >>>>> > >>>> _______________________________________________ > >>>> time-nuts mailing list -- [email protected] > >>>> To unsubscribe, go to > >>>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > >>>> and follow the instructions there. > >>>> > >>>> _______________________________________________ > >>> time-nuts mailing list -- [email protected] > >>> To unsubscribe, go to https://www.febo.com/cgi-bin/ > >>> mailman/listinfo/time-nuts > >>> and follow the instructions there. > >>> > >> > >> _______________________________________________ > >> time-nuts mailing list -- [email protected] > >> To unsubscribe, go to https://www.febo.com/cgi-bin/ > >> mailman/listinfo/time-nuts > >> and follow the instructions there. > >> > > _______________________________________________ > > time-nuts mailing list -- [email protected] > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > > > -- > vbradio.wordpress.com > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
