Date: Thu, 16 Jun 2011 13:58:09 +0200
From:
[email protected]
To:
[email protected]
CC:
[email protected];
[email protected];
[email protected];
[email protected]
Subject: VLF: DK7FC's 11th VLF kite experiment
Dear VLF group,
Since more than 4 months the wind and rain situation looks
promising for the weekend on my /p QTH in JN49IS36VH. So i
plan to do
my
11th VLF kite experiment this weekend,
either
on Sat
18th or Sun 19th June 2011, will be announced on
friday. I already
announced it at the German air traffic control and just got
a phone
call were the permission was granted.
The plan is to come
on air at about 6 UTC.
The antenna will be the
300m vertical kite antenna.
I'll plan
to serve the
bands 33km and 46km, i.e. 8970 Hz and 6470
Hz. Since
i made a new tap on the TX coil i can now resonate the 300m
antenna on
6470 Hz too. This should give a about 4 dB stronger signal
on 46km.
Since the gap of low QRN is much smaller now, the experiment
will not
take many hours, maybe just 4 or 5.
Maybe i can get the 4 kVA generator and will produce a 6 dB
stronger
signal but this is not clear so far. Otherwise i am limited
to 550 W TX
power. I will limit my antenna current to 2 A in order to
prevent a HV
breakdown on the coil and due to thermal losses. At 2 A
antenna current
i should have up to 250 mW ERP!
The program is to start a longer dash, about 40 minutes, GPS
locked on
8970.00000 Hz, then a message in DFCW-600. Depending on the
feedback of
receiving stations i will try to send DFCW-60 or DFCW-10 or
DFCW-3 and
CW.
Then i'll move to 6470 Hz, transmitting a 40 minutes dash
and a "K" in
DFCW-600 or so.
As usual the signals will be visible on my grabber in 40 km
distance:
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber.html
for 8970 Hz and
http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html
for 6470 Hz (spectrogram still not available)
but surely visible on many other grabbers too ( see
https://sites.google.com/site/sub9khz/vlf-grabbers
for a list of
available Dreamer Band grabbers).
Some new VLF receivers appeared since my last experiment.
Two of them
are:
http://qsl.net/4x1rf/yo/vlfgrabber.htm
(1435 km)
http://www.ok2bvg.cz/vlfgrabber/
(598 km)
Leaving a trace on these and all other new and old VLF
stations is the
goal! Despite high QRN and the longest days in the year
(here in EU) i
am optimistic.
Maybe Markus/DF6NM or Marco/DD7PC or someone else in DL
wants to be
available on the phone for QSP to the reflector?
Looking forward to the weekend and hope all works well and
we'll have
much activity.
Best 73, Stefan/DK7FC
