''within easy reach of an Opera-32 correlation
detection''
... That could also mean a
slightly less powerful , may be 10 dB signal,
originating from a similar location , over
the same path , may provide a OP32
correlation detection and be the first
positive call sign ID EU>VK ... ?
G :-,)
Sent: Tuesday, April 09, 2013 7:49 PM
Subject: Re: LF: Best results so far from Germany to
Tasmania
Edgar, Stefan,
this is an outstanding result! Great to
see what is possible on LF, given a good antenna, a quiet location,
and patience paired with persistence.
Did you by chance have a look at the best SNR in
the spectrum plot? The fat parts of the trace might have been 12
or even 15 dB, in a 7.5 mHz FFT. This would put it within easy
reach of an Opera-32 correlation detection, and possibly even close to
a WSPR-15 decode.
Alan, I assume that DST would affect attenuation
globally, without preference for one direction or another. Or could an
eastern path be better during one night, versus westward in
another?
Best 73,
Markus (DF6NM)
Sent: Tuesday, April 09, 2013 2:09 PM
Subject: LF: Best results so far from Germany to
Tasmania
LF,
Last
evening there was excellent LF propagation from EU to VK. Edgar J. Twining (SWL)
was watching the LF DX window for several weeks now. The season on that path in
spring (EU) 2013 was very poor and we already thought that the season is over.
However yesterday the path was open for a exceptional long time and the S/N was
very good! Transmissions were done in DFCW-180. I've been on air for several
days now and such a result is most probably possible for 1 time in the year or
maybe 2 years.
These are the results:
My signal: https://dl.dropbox.com/u/19882028/LF/DK7FC%20WR%20ver%20spectrum%20-18.PNG
DCF39:
https://dl.dropbox.com/u/19882028/LF/DCF39%20WR%20ver%20spectrum%20-14.PNG
DCF39
plot: https://dl.dropbox.com/u/19882028/LF/DCF39%20WR%20ver%20plot%202013-04-08%2021-30.jpg
The
path is 16806 km, http://no.nonsense.ee/qthmap/?qth=QE37PD&from=jn49ik00wd
It
shows once again that it is always worth to transmit and to receive/watch for
exceptional conds(x) on the bands!
Many thanks to Edgar for his
continuous patience and interest to receive on 137 kHz from the other side of
the world!
73, Stefan/DK7FC
