> Why not say 1.990 MHz to avoid QRM.
Mainly because nobody will be listening there.
On most nights there are dozens and dozens of stations monitoring (actually 132
at this moment) the standard 160m WSPR frequency. Overnight WSPR’ing has been
with us for several years now and can’t really be compared to the typical CW
beacons heard on 10 or 6m. On HF they are almost invisible to those using the
band and their typically low power levels usually put them below the threshold
of audibility by ear. They create no QRM unless you live down the street from
one and are not continuous since they transmit at random periods throughout the
hour at a user predetermined duty cycle. Most transmit once every 10 minutes or
so. I see no reason why your WSPR propagation plans should not continue along
with the numerous other ones on Topband.
Steve VE7SL
WEB - "The VE7SL Radio Notebook": http://qsl.net/ve7sl/
VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to Nanowaves":
http://ve7sl.blogspot.ca/
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