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Dear Roger,
well, I think yes.
Attached are the two spectrograms from Paul (top)
and myself (bottom), stretched to the same timescale 14:00 to 18:00 UT. The
frequency was accurately as stated before, within a few milliHertz. This
also was the first time I have seen a stable carrier, in a week since
I started my grabber.
The indicated QRSS 120 message is only my
guess of what Stefan might have started to send, before suddenly
quitting. He had actually mentioned before that his generator might be
running out of fuel sooner or later.
For receive, Paul used a pair of magnetic loops,
with automatic beam steering for minimum noise. I have my LF Marconi, currently
lowered to 3 m above the roof. The VLF signals are tapped off at the foot of the
transformer coupled LF receiver input, using a 33 nF capacitor inserted into the
ground line.
Best 73,
MArkus (DF6NM)
----- Original Message -----
Sent: Monday, March 15, 2010 11:30
PM
Subject: Re: LF: DK7FC's 2nd VLF TX
test...
Do we have firm confirmation of the reception
of Stefan's 8.97kHz signals at distance yet? From the evidence seen so far
this looks likely, but it would be good to have the details confirmed for the
record books and to satisfy the sceptics. Even Mal may have a go on 8.9kHz if
this test transmission was as successful as it appears, HI.
What was
the final TX and antenna arrangement and what did those who received the
signals use for antennas and receivers?
73s
Roger
G3XBM
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