Re: [IRCA] Recent DXpedition to Grayland, WA & Florence, OR

["Craig Healy" <bubba@xxxxxxxxxxxxxxxxxxxx>]

An important aspect of losing signal when going away from the shore is the 
ground conductivity in that area.  That makes a significant coverage change 
for any identical station by frequency, power and antenna.  Local stations 
like 1230, etc., cover far better in the middle of the US than in places 
like New England.  The FCC has a PDF map that can be downloaded to show the 
ground conductivity in the US.  Should be accurate for Canada near the 
border as well.

http://www.fcc.gov/encyclopedia/m3-map-effective-ground-conductivity-united-states-wall-sized-map-am-broadcast-stations

Craig Healy
Providence, RI

_______________________________________________
IRCA mailing list
IRCA@xxxxxxxxxxxxxxxx
http://montreal.kotalampi.com/mailman/listinfo/irca

Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers

For more information: http://www.ircaonline.org

To Post a message: irca@xxxxxxxxxxxxxxxx