Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz

[Ray Benny]

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> wrote:

> > From: k1fz at myfairpoint.net
>
> > 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
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