During a very pleasant meeting with Chris 4X1RF and
his family, we discussed possibilities of improving the noise situation for
LF here in the Kibbutz. Chris suggested to replace the low active
antenna by a passive long wire and a separate earth. Walking through the
village with "open eyes", today I managed to find some 30 m of old unused
telephone wire which was thrown over some branches, using fallen grapefruits as
casting leads. I could also salvage a ferrite choke from a discarded TV
power supply, which now serves as a common mode choke to separate the earth
connection from the notebook supply. Comparing HGA / DCF before and after,
it looks like the SNR has dramatically improved by some 10 to 15 dB.
So the TA / Eu grabber is up again on
the dropbox (link below), and I'm watching wspr-15 and
Op-32 again tonight.
Thanks Chris!
Best 73,
Markus (DF6NM)
Sent: Tuesday, March 05, 2013 8:00 PM
Subject: LF: 4X/DF6NM
I've set up a temporary LF receiver near Kiryat
Shmona
uploading TA and Eu slots
to the dropbox file normally used for MF
This is only a low active antenna outside
the window, so the local noise baseline is far from optimal. The internet
connection is "borrowed" from a friendly neighbour so probably not too reliable
either.
Looking out for WSPR-15 and (perhaps) Opera-32
as well.
Best 73,
Markus (DF6NM)
