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Mal,
your pictures are
quite convincing, we can now be sure that you were indeed seeing Stefan's signal
all the time today.
Congratulations, well
done!
Best regards,
Markus (DF6NM)
PS: It would be fantastic if you would want to
set up a loading coil and TX, and perhaps conduct a two-way
VLF QSO next time Stefan's comes on...
Sent: Sunday, February 06, 2011 8:35 PM
Subject: Re: dk7fc
Markus
I did take a few shots and did see u close down at the end
but I was experimenting more with QRS speeds to see what happened to
your signal. At the end there was some dfcw but I did not take any photos at
that time. Your signal was solid all day on 8970 when you were on carrier then
keying, no mistake about being the dk7fc signal.
See attached photos and some drift of a few Hz at my end.
Today I was only concerned at signal strength at various
QRS speeds and not what was being keyed. Now that I know my system is working
next time we should try a QSO. The signal was peaking 23 dB above noise as
indicated on speclab and my QTH is vy quiet with no noise.
My screen is adjusted/calibrated for acty at 1000 hz plus
minus a few Hz and look at 1004 Hz for your signal.
Ignore the qrm trace on the LF side of
1000 Hz
73 and gl
de mal/g3kev
----- Original Message -----
Sent: Sunday, February 06, 2011 7:09
PM
Subject: Re: dk7fc
Mal,
Stefan and I are truely amazed how well you
apparently copied today's transmission on 8970 Hz. Seeing it in 3 sec and
1 sec resolution seems really quite remarkable. The three screenshots you
have sent to the RSGB reflector show a good-looking line on 1004 Hz,
which in one case indeed ends at the right time (14:47 UT).
I am wondering if you perhaps have more
screenshots showing features or modulation of the
signal. Before closing down, between 16:03 and 16:26 Stefan
sent a DFCW-60 message using 0.5 Hz shift (see attached), which should
have been visible on your screen. Did you by chance take a screen copy of
that time?
Not sure if resonating the
antenna would really improve receive SNR further - with a large antenna you
probably have enough signal and external noise to dominate over the RX noise
contribution. Anyway it seems you are doing very well with the
system as is.
Best 73,
Markus (DF6NM)
Sent: Sunday, February 06, 2011 4:02 PM
Subject: LF: Re: dk7fc
See capture of switch off on 8970 Khz at 1448 utc
speclab qrs3. Good signal all day on 8970 various modes.
Read freq line 1004
g3kev
----- Original Message -----
Sent: Sunday, February 06, 2011 2:51
PM
Subject: LF: dk7fc
At 1447 sig getting weak kite descending and 1448 utc
GONE.
All visible on speclab at QRS 3
De mal/g3kev
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