Topband: 3B9C propagation experiments

[Robert Marshall-Read]

Same switch-on happens here at SR, only 1.2 degrees north of the equator.
The openings are usually for about 10 to 15 minutes begining before or right
at SR.  But the 9V SS peak follows the terminator across the USA and VE
after something suddenly throws the switch between here and there, about 30
minutes after SS local.

Bob 9V1GO

-----Original Message-----
From: Milt Jensen, N5IA
To: topband at contesting.com; 3B9C (by way of w4zv at contesting.com)
Sent: 29/03/2004 01:08
Subject: Re: Topband: 3B9C propagation experiments

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!



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