Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz

[Don Kirk]

Hi Doug

Last night I told w1fv that my estimate was 70 to 75 deg from my location
in Fishers IN and a heading of 70 deg from my location clips the bottom tip
of Nova Scotia, while 75 deg runs me through  Cape Cod.  Therefore having
very strong signal in southern part of Maine fits in well with what I am
seeing.

Need some good directional headings from Maine, New Hampshire, and Nova
Scotia.

Just FYI
Don wd8dsb

On Tuesday, December 9, 2014, Doug Grant <dougk1dg at gmail.com> wrote:

> 1136z and it is 40 over 9 here in southern Maine.
>
> It is not far away from here.
>
> On Tue, Dec 9, 2014 at 4:41 AM, Rich C <rich_k7zv at gphilltop.com
> <javascript:;>> wrote:
> > I just did a check with the HI Z 4-8 and it is DUE EAST of here at S8-9
> > here in Grants Pass Oregon. It drops off each side of due east when I
> > switch it.
> >
> > Rich K7ZV
> >
> > On Mon, December 8, 2014 10:00 pm, Doug Grant wrote:
> >> 0350z it is back and loud again (40dB over s9) and has QSB.
> >>
> >>
> >> This site shows how Codar systems work
> >> http://www.ims.uaf.edu/hfradar/how_it_works/
> >>
> >>
> >> the sound clip on that page has audio that is higher-pitched than the
> one
> >> on 1915 but similar in structure.
> >>
> >> 73,
> >>
> >>
> >> Doug K1DG
> >>
> >>
> >> On Tue, Dec 9, 2014 at 3:44 AM, Ray Benny <rayn6vr at cableone.net
> <javascript:;>> wrote:
> >>
> >>> Guys,
> >>>
> >>>
> >>> I am hearing something between 1910 and 1925. Its a rapid, raspy, pulse
> >>>  tone, but its coming from the SE in Central AZ (SA direction). It is
> >>> just above my noise level, currently S4, so not strong. Do not hear it
> >>> on my TX vertical. Don't know if this could be the noise reported or
> >>> some local garbage in my area.
> >>>
> >>> Using a HI-Z RX 4 SQ.
> >>>
> >>>
> >>> Ray,
> >>> N6VR
> >>>
> >>>
> >>> On Mon, Dec 8, 2014 at 7:13 PM, Doug Grant <dougk1dg at gmail.com
> <javascript:;>> wrote:
> >>>
> >>>>
> >>>>> From: k1fz at myfairpoint.net <javascript:;>
> >>>>>
> >>>>
> >>>>> Monday? 9;45 AM
> >>>>> Unable to hear the 1900-1925 Khz. interfering signal this morning.
> >>>>> Propagation change, or is the signal gone ?
> >>>>> Anyone still hear it?
> >>>>>
> >>>>
> >>>> I checked a few times during the day on Monday and did not hear it.
> >>>>
> >>>>
> >>>> At 0200z I checked again and it was there and very loud...40dB over
> >>>> s9. Definitely louder on my NE antenna, but only by 10 dB or so. Maybe
> >>>>  it is close enough that it is arriving at a high angle. But 30
> >>>> seconds after I tuned in, it stopped!
> >>>>
> >>>> The signal characteristics are almost identical to CODAR sea-surface
> >>>> radar. There are three of those installations in Maine and VE1 that
> are
> >>>> easy to hear on 4.8 MHz. Maybe they are trying smoethign new there. Or
> >>>> maybe is it in TF or even shipboard somewhere  off Newfoundland...the
> >>>> CODAR system uses fairly small antennas and low
> >>>> power, so it is possible.
> >>>>
> >>>> I placed a phone call over the weekend to the Operations Manager for
> >>>> one of the projects using those sites and left a message asking if
> they
> >>>> had something running at 1.9 MHz, but no answer yet.
> >>>>
> >>>> 73,
> >>>>
> >>>>
> >>>> Doug K1DG
> >>>> Long Island, ME  FN43
> >>>> _________________
> >>>> Topband Reflector Archives - http://www.contesting.com/_topband
> >>>>
> >>>
> >>>
> >> _________________
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> >>
> >>
> >
> >
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