Hello Stefan!
I will QRV to RX UR VLF signal in KO85SP by mobile (handheld) e-probe receiver
and by base RX (wire ant) at my home.
73 de RN3AUS
16 Ð¸ÑŽÐ½Ñ 2011, 16:07 от Stefan Schäfer <[email protected]>:
> 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
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