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

Frister frister at gmx.net
Mon Dec 8 09:22:35 EST 2014


Recorded last night. Audio bandwidth is a few kHz, but as mentioned before
the signal is about 20 kHz wide.

https://www.dropbox.com/s/bnp8zcpgw86l6ww/1910.wav?dl=0

This morning (14:21 UTC) nothing is heard

Frits W1FVB
Whitefield, NH

On 12/8/14, John C. Westmoreland, P.E. <john at westmorelandengineering.com> wrote:
> 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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>>>>>
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