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 <kb...@n1k.org> 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 <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
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