This
range is
used for
civil
aeronautical
communications
in USB.
In North
America
this is
a radio
amateur
band.
Best
reception
is at
night.
An
interesting
frequency
on this
band is
3950
kHz; it
is an
active
ham
radio
frequency,
the
“Liberty
Net”,
the
hurricane
net
during
the
summer
(see
also
14325
kHz) but
is also
used by
many
European
military
and
government
stations.
