wrote:
Some Shortwave bands go to other frequencies at certain times to make
room for other Shortwave bands to use the bands they were previously
using.They will be back later on.
cuhulin



That might be a reason. But the much more likley reason is that
higher frequencies tend to work well in the daytime, lower frequencies
at night. Propagation is very poor at 11 meters in the dead of night,
just as it is in 90 meters at noon (at your location). They move around
according to where the best propagation is going to be in reference to
their target audience.

Tony

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