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 <tsho...@gmail.com> 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 -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
