Hello Marcus,
if all stations switch at local midnight (UTC of course) this would
result that in Europe there will be sub-band switching over a 4 hours
period (from UA at the east to G/CT at the west), a period that both
windows might be filled with "locals".
Maybe it is better that all Europeans switch at the same moment (the same
for North-America, and SE-Asia) ?
73, Rik ON7YD - OR7T
At 09:38 11/12/2009, you wrote:
Dear LF,
the passage should have said:
Taking into account the path of mutual darkness, this would
mean that all stations should transmit in the UPPER band during their
evenings until local midnight, and then QSY to the lower band for the
rest of the night.
Sorry for the confusion.
73, Markus
From: Markus Vester
Sent: Friday, December 11, 2009 12:14 AM
To:
[email protected]
Subject: LF: Intercontinental LF waterholes
Dear LF group,
recently we find the "transatlantic waterhole"
around 137.777 kHz quite busy. Several Europeans have started beaconing
within this segment. And there has been some fast (QRSS3 or 10) activity,
with wide traces covering up possible transatlantic DX signalling
frequencies.
During the last years, we have attempted to split the
frequency bands for both directions of transatlantic work. Traditional
segments were around 137.777 kHz west-to-east (for Americans transmitting
towards Eu), and around 136.320 kHz east-west (for Eu to stateside). Slow
modes (QRSS or DFCW, 60 second and longer) were used almost exclusively
there, and several stations were able to successfully cross the pond in
either direction.
The situation has become a little more intricate as more
stations from other parts of the world (eg. Asia, China, Japan) are
joining the game with sensitive receivers and good signals. But I still
think it would be helpful to separate RX and TX bands within each area as
much as possible.
My suggestion would be to stick with the east-west versus
west-east allocation of the two slots. Taking into account the path of
mutual darkness, this would mean that all stations should transmit in the
lower band during their evenings until local midnight, and then QSY to
the lower band for the rest of the night. Receiver settings would of
course be vice versa.
I'm aware that this scheme cannot be perfect and universal.
It won't cover North-South hauls, and would not protect signals during
early or late openings. But it's simple enough, and I believe it would
still be very useful. Please don't get me wrong - I do not want to
discourage anyone from putting out a signal, and certainly reject the
notion of anything reminiscent of a "band police". I just think
a little coordination may help all of us to be successful on this
challenging and fascinating band.
Let me have your thoughts...
73 de Markus, DF6NM
http://freenet-homepage.de/df6nm/Grabber.htm
|
