Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz

[Brad Rehm]

Can't hear it at all in central Texas.  It was running S7-S9 last night a
2100.

Brad  KV5V

On Tue, Dec 9, 2014 at 5:45 AM, Doug Scribner <dscribner at myfairpoint.net>
wrote:

> 10 over 9 in SW New Hampshire @ 1140Z
>
> Doug - K1ZO
>
>
>
> ----- Original Message ----- From: "Tony K1AMF" <k1amf at live.com>
> To: "'Doug Grant'" <dougk1dg at gmail.com>; "'Rich C'" <
> rich_k7zv at gphilltop.com>
> Cc: "'Ray Benny'" <rayn6vr at cableone.net>; <topband at contesting.com>
> Sent: Tuesday, December 09, 2014 6:41 AM
>
> Subject: Re: Topband: Unknown Pulse Signal Wiping out 1900-1925 kHz
>
>
>  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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