Last update from Stefan -> he will be ready soon with his
transmission on 5.170KHz. Then he changing the antenna wire back to 200m to get
it matched for 8.970KHz. Stefan transmit on 8.97KHz until the petrol in his
generator is empty.
I should say many thanks to everybody looking to his
transmission. More details from Stefan later or tomorrow.
I must also say many thanks to Stefan for all his effort and
congrats for the great results.
vy73
Marco
DD7PC
DK7FC transmitting now 5170Hz….
Short update from Stefan, DK7FC - the session is not over, but he
had some troubles with increased wind and the longer antenna wire. He still
fighting with the kite....
Regards
Marco
Stefan decided to send only one character. After that he increase
the antenna to 300m and qsy to around 5.17KHz.
I announce exact qrg later.
DD7PC
Hello,
Another short update.
DK7FC, Stefan started to TX on 6.47KHz (you can check on http://www.iup.uni-heidelberg.de/schaefer_vlf/DK7FC_VLF_Grabber2.html)
Jacek your report and rx setup is really good. My QTH is only
abt. 60Km from Stefan away and I receive him not better then you.
Stefan will tx now a carrier for 30-40min and after this he send
again a 2 character message in DFCW600.
Then he will QSY to +/- 5170Hz. Stefan is not 100% sure about
the frequency.
Regards
Marco
FYI!
Stefan, DK7FC stopped now the transmission on 8970Hz and QSY to 6470Hz.
vy73
Marco, DD7PC
Hello LF,
Many thanks for reports from Victor, Henny, Jim and Jean-Pierre
so far.
I had Stefan on the phone 5min. ago and passed to him this
information.
Stefan told me the weather is perfect with very stabile wind
conditions. He has around 900mA antenna current and 550W Pout.
Please note DK7FC will stop shortly the carrier (which was on
for abt. 1h) and switch to DFCW600. He will transmit 2 characters and after
this transmission he will change the QRG to 6470Hz.
vy73
Marco, DD7PC
From: [email protected]
[mailto:[email protected]] On Behalf Of Stefan Schäfer
Sent: 21 October 2010 17:26
To: [email protected]; Paul; Renato Romero; Barzen, Guido;
Bernd Grupe; Christian Axtmann; Bernd Strehhuber; George Vastianos
Subject: VLF: DK7FC's 8th VLF kite experiment
Dear VLF,
This weekend i plan to do my next kite experiment. I have got the permission
for a kite ascent up to 300m above GND on my QTH in JN49IS36VH.
I will be QRV either on saturday or on sunday, depending on the wx.
Attached you see the current wind forecast. For saturday the wind is not
optimal, a little weak but it will be dry. On sunday the wind is quite strong
and stable but there is probably some rain... I will have to see on friday evening
if i can start on saturday or sunday and will announce that here.
If i will start on sunday, where the SAQ transmission takes place, this will be
no problem since one can listen to SAQ and receive my transmission on an other
computer based RX (e.g. SpecLab), so both can be done to the same time :-).
The starting time should be as early as possible. I have the permission at
6...16 UTC!
The program is to...
- rise the 200m vertical and transmit a long carrier (30 min) on 8970 Hz, after
that a message in DFCW-600 and after that a message in DFCW-120, then a short
CW test.
- transmit on 6470 Hz in DFCW-600 hoping to be copied at further stations
(maybe M0BMU, SQ5BPF, OE3GHB, PA3FWM...?)
- if the wind will be optimal i will add another 100m and will try to transmit
at 5170 Hz, 58 km band. This might be once again the lowest frequency an
amateur has ever transmitted and reached the far field and above 1 Lambda, so
each reception will be a WR for amateurs ;-) BTW, my grabber in Heidelberg is
in < 1 Lambda ;-) The mode will be DFCW-600 as well.
- Then, coming back to 8970 Hz (maybe in the late afternoon) and transmit a
looong carrier for long time integrations, maybe for a new ODX.
- reach 1,4 A at 8970 Hz, 1 A at 6470 and 5170 Hz
- be detected at 3 new stations and a new ODX ;-)
- use a GPS disciplined transmitter (trying SpecLab as the VFO and DFCW
generator the first time)
- measure the R, 'C' of this 300m vertical on 137 kHz, preparing a new test
there ;-) Since it is 55 % of a full size lambda/4 GP, 5 pF/m is not valid i
assume
- be fascinated by the view of such an antenna which easily finds place in my
car after the test ;-)
Until now i don't know who of the german LF group members would be possibly on
the phone to make QSP to the reflector, just like Markus did it in the past. If
there is a german member who likes to do that job, please send me a personal
mail to exchange the phone numbers (Festnetz oder O2). Otherwise i have to play
my game there alone and will see what happend in the evening ;-)
BTW, the generator is running again. It started to run again just as i have
packed all my stuff in the car after the last experiment :-/ Never mind...
Have i forgotten something?
Please tell me if you think it is no good idea to transmit during the SAQ transmission
or what is your favorite day, if both is possible here. I would prefer sunday,
if the rain forecast changes to sunny :-)
73 and looking forward to the weekend :-)
Stefan/DK7FC
