Hello José,
OK. Do you already have a receiver for VLF? If so, which one? The PC's
soundcard? Or do you just guess that you have strong QRM?
Many stations are in the city, like 4X1RF, SQ5BPF and me. Anyway there
is good reception, 4X1RF even at above 2500 km! Others are in the
countryside and have never really got good reception, so mostly its an
EMC issue.
Thus i would suggest to built a suitable antenna and run a suitable
software and monitor the total spectrum of your soundcard input which
is mostly 0...24 kHz, often called "wideband". You can see these
windows running on many grabbers such as
http://www.mydarc.de/df6nm/vlf/vlfgrabber.htm
http://www.ok2bvg.cz/vlfgrabber/
http://qsl.net/4x1rf/yo/vlfgrabber.htm
http://simnet.is/halldorgudmunds/TF3HZ_VLFgrabber/index.html
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
and many others.
Then, you'll get immediately an impression of the actual situation and
see effects like mains hum, sferics and the Alphas system and some MSKs.
Seeing the Alphas and the sferics (i.e. the gap arround 8...11 UTC) is
a first good indicator for sensitivity!
Actually all you need is a few Euros to build that RX antenna which can
be a loop or a E field antenna. Mosty receptions were done with the E
field antennas which have some advantages due to their low weight and
volume. But loop antennas have shown very good results as well, mostly
in quiet locations (like Paul Nicholson, F4DTL, M0BMU...).
73, Stefan/DK7FC
Am 14.06.2011 00:08, schrieb Jose Manuel:
Stefan,
I´ll try to do some experience on
sub 9kHz reception; I´ll try to find a quiet location on holiday,
because I live in a very noisy urban environment.
Regarding 137 kHz I had some 2-way
QSO´s in the past with your country, with Wolf, Markus and others, but
currently my LF antenna is down and I need to repair the SLM as well.
73 de José, EA1PX
-----
Original Message -----
Sent:
Monday, June 13, 2011 11:42 PM
Subject:
Re: LF: ZEVS tonight.jpg
Josè,
You can get many informations about the Dreamers Band (<9) at G3XBMs
sub 9 kHz website: https://sites.google.com/site/sub9khz/
Here you find record lists and advice for antennas. And you can get
every information needed HERE! :-)
73, Stefan/DK7FC
Am 13.06.2011 23:30, schrieb Jose Manuel:
Mal and all,
You know that reception on 9 kHz
is much more difficult than on 137 kHz.
I never tried to receive below
10 kHz, perhaps in a couple of weeks, when I´m on holiday ;-)
73, José, EA1PX
-----
Original Message -----
Sent:
Monday, June 13, 2011 7:53 PM
Subject:
Re: LF: ZEVS tonight.jpg
Jose
In the past you were able to
copy me on CW no problem, with XBAND qso
de mal/g3kev
-----
Original Message -----
Sent:
Monday, June 13, 2011 4:14 PM
Subject:
Re: LF: ZEVS tonight.jpg
Hi Stefan and all,
I´m in the NW of Spain,
locator IN53ti, but with a very long path with you ;-)
73 de José, EA1PX
-----
Original Message -----
Sent:
Sunday, June 12, 2011 11:57 PM
Subject:
Re: LF: ZEVS tonight.jpg
Eddie,
Where in France will you be? http://no.nonsense.ee/qthmap/
:-)
Will you be RX QRV on LF/VLF? If you are in the south, this would be an
interesting region. Unfortunately there is nothing yet from Spain on
VLF...
QRN will be high i assume so maybe it wouldn't be easy. Anyway iz would
be worth a try. BTW i just checked for wind and the next weekend looks
promising so far. If it will hold on, i'll try a kite VLF experiment
but still much can change until then...
73, Stefan/DK7FC
Am 12.06.2011 23:27, schrieb qrss:
Hello Nicolas
Yes almost 100% transmissions at 0800 and 1700UTC.
Each data element is 4min and there are 6 of those plus 'start' and
'space' makes 8 total, 32 minutes then the final long carrier 'stop' is
1 Hour.
Good luck with the antenna, yes urban noise is the big problem. Soon I
will come to France to try some really quiet places, I look forward to
that.
73 Eddie G3ZJO
On 12/06/2011 21:34, [email protected]
wrote:
Henny, Eddy beautifull captures.
It's every day at the same hour ? 0800 and 1700
UTC ?
How long the ZVES transmissions ?
I built an new VLF antenna and I'll start soon
receptions.I would be in campaign to reduce urban noise.
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