Message-ID: <4EB04EAD.6000506@iup.uni-heidelberg.de>
Date: Tue, 01 Nov 2011 20:55:25 +0100
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
MIME-Version: 1.0
To: rsgb_lf_group@blacksheep.org
References: <4EB04901.707@broadpark.no>
In-Reply-To: <4EB04901.707@broadpark.no>
Subject: Re: LF: Transmission on 8,97khz in the near future?
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org
X-AOL-SCOLL-URL_COUNT: 0  
x-aol-sid: 3039ac1d40d54eb04f2558de
X-AOL-IP: 195.171.43.25
X-AOL-SPF: domain : blacksheep.org SPF : none


Hello Steinar,

A few hours ago i wrote an email to some VLF grabber runners. There i 
announced further tests on my fixed antenna here in Heidelberg. This 
antenna performs well on LF but on VLF the signals are rather poor. 
Anyway, the QRN is as low as never seen here in the last days so i 
actually think there could be a chance to see my signal.
A next kite experiment is planned as well but unfortunately there was no 
suitable wind since many weeks. It has to be on a weekend, so that many 
stations find so time to view... I'll keep an eye on the wind forecast. 
The experiments on the fixed antenna here are independent of wind of 
course but the signal will be at least 30 dB lower!
You have to have a good prepared SpecLab configuration to see anything 
at all. Something like "DFCW-6000" is needed for the fixed antenna and 
our distance.
It would be interesting to see some "wideband" screenshots from you 
before we start, i.e. a plot over several hours, covering 0...24 kHz or 
so, as seen on almost any VLF grabbers. This helps to identify your 
noise and sensitivity situation. Can you publish such a spectrogram here?
If you need further advice, just ask.
So, maybe next week i will do a test here on the fixed antenna, 
radiating about 50 uW ERP.

73, Stefan/DK7FC

PS: Lubos/OK2BVG, when will you be on air again?



Am 01.11.2011 20:31, schrieb Steinar Aanesland:
> Hi all,
>
> Is there any plans for a transmission on 8,97khz in the near future?
> I have made me an active E-field antenna
> (https://sites.google.com/site/sub9khz/antennas/e_field_DK7FC.jpg?attredirects=0)
> and it could be very interesting to see how well it works .
>
> la5vna Steinar
>
>
>
>