[time-nuts] 1900kHz radiolcation testing on east coast US?

John C. Westmoreland, P.E. john at westmorelandengineering.com
Mon Dec 8 05:48:32 EST 2014


Hello,

Can someone please post a *.wav file of what it sounds like provided you
have an SDR set-up?

If you need someplace to post - please send the file to me offlist and I'll
put it on either an ftp site or http.

I am not so convinced what I saw wasn't noise or some stations from China
transmitting - which I have seen in the 160m band lately.
I got an AM band tonight also that was stomping all over ~ 3.87 MHz.

Thanks!
John
AJ6BC


On Mon, Dec 8, 2014 at 2:30 AM, Graham <planophore at aei.ca> wrote:

> Radiolocation may be a bit misleading.
>
> Some first thought that this was CODAR but it is not, at least not what I
> am familiar with but it may be another variation of an ocean surface wave
> RADAR type of system but it is certainly not like one I have heard before.
>
> cheers, Graham ve3gtc
>
>
> On 2014-12-07 20:03, paul swed wrote:
>
>> 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 <kb8tq at 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 <tshoppa at 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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