Re: [IRCA] 1710 Mystery Russian - Bearings Measurements

[D1028Gary@xxxxxxx]

Thanks Guy,
 
Your detailed investigation is appreciated. During late night monitoring of 
 the weak 1710 Russian, I also had a null in a general north-south 
direction,  which could place the station anywhere from Blaine to Federal Way. 
Probably the  only way to really nail it down is to take a DF loop in a car 
traveling east of  Puget Sound (I-90 or even better, Highway 2 to Stevens Pass) 
and get a bearing  to pinpoint it. 
 
I'm sure the one who nails it down will be quite popular-- not only among  
the NW DXers, but also among those who would like the discussion to end  :>)
 
73, Gary 
 
 
 
In a message dated 5/26/2009 10:02:40 P.M. Pacific Daylight Time,  
dx@xxxxxxxxxxxxx writes:

I've  spent at least a couple hours today trying to pin down the bearing of
the  1710 kHz mystery station from my location. Most of the day only a
carrier  was audible, and it was really difficult to find a null point due 
to
the  very weak signal and varying signal strength (typical: -102 to -111 dBm
in  less than a minute). It takes my rotor with the ALA100 about a minute  
to
turn 360 degrees, so with the variable signal it was nearly impossible  to
discern a believable bearing.

Within the last few minutes  though--about 1/2 hour past local SS--the
Russian language audio appeared  on 1710 and the signal has steadied a bit.
The strength is about -96 dBM  (S-5), and it's getting stronger by the
minute.

Interestingly, I'm  getting a sharper peak with the ALA100 vs. a sharp null.
This is really  helping out with the confidence level for DF'ing, and the
station is  appearing on a bearing of 0 - 180 degrees (as close to a true
north-south  line from my Puyallup location as I can measure).

A lot of potential  communities are on this bearing: all of the south Puget
Sound area (Kent,  Auburn, Renton, etc.) as well as Mercer Island & Bellevue
on the East  Side of Seattle. Farther north, potential locations are
Kirkland,  Kenmore/Bothell, Everett, Marysville, and into  Canada...
Abottsford.

Mount Vernon, Bellingham, and Blaine are at  approximately 350 degrees from
Puyallup, so they are possibilities too, as  others have mentioned.

To the south of me there are not many potential  targets, but there is 
Graham
and Orting. I'm not aware of any Russian  communities in these towns, but it
would be simple enough for me to drive  out there to check reception. For
that matter, I could investigate Kent,  Auburn, Renton, and Bellevue easily
on my drive to & from  work.

A useful Web site is  http://www.gpsvisualizer.com/calculators,  with 
various
ways to  calculate distances and bearings between different  cities.

73,

Guy Atkins
Puyallup,  WA
www.perseus-sdr.blogspot.com
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