Am 22.12.2014 17:17, schrieb Guyé André:
[...]
I agree with you, Mal. For DX, the Propagation
on both MF BANDS 160 and 630 meters similar. The only diference is the
ERP power, because on 630 m the standard ham antennas have not 100 % of
efficiency, HI.
Propagation on both MF BANDS similar
de MAL/G3KEV
Never ever! I saw regular WSPR decodes with 2W TX power (if it is
true!) on 160m between EU and VK. No chance on 630m except some very
very very very very very very very very very very very very very very
very very very very very very very very very very very very very very
very very rare events like prooved by F6CNI :-)
I've put out several 10000 WSPR sequences now, with decent power. Best
distances were to the US east coast, TF, EA, upper LA and near Moscow.
Not a single one above 2500km over land.
And most amateur antennas are not 100% efficient on 160m as well. But
1W ERP is possible on MF for most i assume. In more than 2 years we saw
now that WSPR from EU does not propagate farer than 2000 km, except
some TA detections, i.e. mostly water on the path. However it is a
challenge to leave detections in 2000 km over land. And Japan is about
9000 km over land, from here, or France or UK.
So let's hope for the very rare events. Better try LF instead, no choke
:-)
73, Stefan
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