Re: [IRCA] Latin America DX western US/Canada (was: Oklahoma TP DX 10/3/16)

[Russ Edmunds <wb2bjh@xxxxxxxxx>]

Geometry is a big piece. To elaborate on Chuck's comment, the auroral oval
sinks to a lower latitude in ECNA than it does in the western portions.
That results in more absorption of stations whose skywave interacts with
that, and thus more signals from the South. Add in the partial water path
over the Gulf and it's a big difference. Farther west the signal paths have
to traverse more land in the US and much more of Mexico, reducing the
availability of Southern signals.


Russ Edmunds
15 mi NW Phila
Grid FN20id
<wb2bjh@xxxxxxxxx>

AM: Modified Sony ICF2010's (4) barefoot w/whip
FM: Yamaha T-80 & T-85, each w/ Conrad RDS Decoder;
Onkyo T-450RDS; Tecsun PL-310 ( 4);
modified Sony ICF2010's (3) w/APS9B @ 15';
modified Sony ICF2010 w/whip


On Mon, Oct 3, 2016 at 10:27 PM, Chuck Hutton <charlesh3@xxxxxxx> wrote:

> So right.... I don't understand why this is such a mystery to the east
> coasters. Aurora geometry and land path and bearing to DX = bearing to
> interference explains it all.
>
> Chuck
> ________________________________
> From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <
> nhp@xxxxxxxx>
> Sent: Monday, October 3, 2016 6:33 PM
> To: Mailing list for the International Radio Club of America
> Subject: Re: [IRCA] Latin America DX western US/Canada (was: Oklahoma TP
> DX 10/3/16)
>
> I think that the westerners lack of enthusiasm for auroras is
> generally poor results when one occurs.   Possible reason is that the
> aurora has to be quite intense to affect us, as our geomagnetic
> latitude is further south than the eastern and midwestern USA.   An
> aurora that wipes out midwestern interference for easterners is also
> going to start to block paths from say Venezuela to the Pacific
> northwest.    An aurora that shuts down reception of the still
> dominant eastern clear channels  for eastern DXers, allowing southern
> DX to get through, has little effect on our principal interference
> sources here, which are from the south (San Francisco, Portland
> etc.)   Our interference from Boise, Calgary and Billings, MT is just
> not that important in comparison.   As someone said once to me in
> Vancouver, BC, when you face north, the next city of any size is St
> Petersburg; there is just not much interference up that way.
>
> So, we're  spoiled here.   Compared with the east and mid west, the
> band is not so full of powerful signals. However, what powerful
> signals we have are all in the way of reception from Central and
> South America, which is a fair bit further away than those locations
> are from the eastern part of the continent....mostly a land path too,
> whereas your paths often involve water.    And the aurora won't
> affect them without affecting targets further south.
>
> So, we'll just have to wait for split frequencies and continent wide
> clear channels to return.
>
> best wishes,
>
> Nick
>
>
> At 17:38 03-10-16, you wrote:
> >....
> >My "two cents."  I'm always surprised at how auroras are not usually
> >a cause for great DX enthusiasm out west and that so little
> >non-Mexico Latin American activity is ever reported even with
> >probably 4 times as many active DXers out there as compared to the
> >northeastern USA and adjacent Canadian provinces.  (And you guys are
> >often running better antennas.)
>
> Nick Hall-Patch
> Victoria, BC
> Canada
>
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