Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz

[Tony K1AMF]

S8-9 near NYC right now 11:40Z...was about 10 over 9 here a half hour ago.

-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Doug
Grant
Sent: Tuesday, December 9, 2014 6:38 AM
To: Rich C
Cc: Ray Benny; topband at contesting.com
Subject: Re: Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz

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> 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> 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> 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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>>>>
>>>
>>>
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>
>
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