[HCDX] Re: [SWL] 8700 kHz via long path?

["Duane Fischer, W8DBF" <dfischer@xxxxxxxx>]

Bruce, 	
	
There have been two solar flares of class X intensity the past thirty-six hours.
There is, and will be, probable aurora activity. Long path propagation, such as
you described, is not uncommon under such conditions. Additionally, I wonder
about the polarization of your antennas in respect to those of the transmitter
site?	
	
There are a whole gambit of possibilities as to why one receiver hears it on a
particular antenna and another may not. Without knowing specific settings,
antenna installations/designs and so forth, it is just speculation to comment.	
	
Duane W8DBF 

----------
From: Bruce Portzer <bportzer@xxxxxxxx>
To: Hard Core DX <hard-core-dx@xxxxxxxxxxxxxxxx>; SWL <swl@xxxxxxx>
Subject: [SWL] 8700 kHz via long path?
Date: Saturday, October 20, 2001 12:05 AM

Tonight I had a very noticeable echo on the 8700 kHz Commando
Solo/Psyops/Information Radio broadcasts.  It was most prominent when
the signal peaked around 0130z.  By 0200 the signal was much weaker, and
the echo was less noticeable.  It didn't sound like room acoustics, but
more like the the signal was arriving via two paths, as sometimes
happens on shortwave.

This was on an R8A with a K9AY antenna (which produced the same S-meter
reading in all 4 directions).  Oddly enough, there was no echo on my
Icom 706 ham rig with a 40 meter Isotron antenna (an omni-directional
looplike thing about 30" in diameter).  The only thing I can figure was
a difference in vertical patterns between the two antennas.

Coincidentally, this was just after sunset in Seattle and near sunrise
in Kabul, so it was essentially a greyline path between those cities at
that hour (and maybe an hour or so after sunrise in Diego Garcia,
fwiw).  

Has anyone else noticed this?   

Bruce Portzer
Seattle, WA, USA
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