Topband: 3B9C propagation experiments

[Milt Jensen, N5IA]

Nearly identical to our experience at XZ0A sunset to NA.  Cqing with
nothing, then after a single CQ sequence, BOOM, there they were with
multitudes of signals.  Then we just followed the morning terminator across
the US.

Milt, N5IA

>     Hypothesis 1:  Our experience here is that the band opens to North
> America like someone flipped a switch in the ionosphere.  This is very
> consistent.  Many consecutive CQs with absolutely no detectable response.
> (When not actually working stations, we are calling CQ every 5 seconds
from
> 1330z [half-hour before sunset] until 0230z [half-hour after sunrise]
> through the entire night.  We've seen some emails from people who think we
> are not on the band sometimes.  We are always on and transmitting -- if
you
> don't hear us, you don't have propagation.)  Then one more CQ, and the
> listening frequency is immediately filled with many stations from all over
> North America!