Date: Sat, 19 Jan 2019 23:23:29 +0100 (CET)
From: Jacek Lipkowski <sq5bpf@lipkowski.org>
To: rsgb_lf_group@blacksheep.org
In-Reply-To: <5C4370BF.7000001@posteo.de>
Message-ID: <alpine.DEB.2.11.1901192318470.1809@mailn.lipkowski.org>
References: <c76c58c5-2e76-561a-6ea1-ab5ebae1f9d9@rtv5.cz> <8ff313a5-7e95-fcee-a827-89500dc89c2d@btinternet.com> <5C4370BF.7000001@posteo.de>
User-Agent: Alpine 2.11 (DEB 23 2013-08-11)
MIME-Version: 1.0
Subject: Re: VLF: Night-transmission on 8270.1 Hz
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
Sender: owner-rsgb_lf_group@blacksheep.org
Precedence: bulk
Reply-To: rsgb_lf_group@blacksheep.org

The spectrogram is here:

https://klubnl.pl/grabber/grabber_sq5bpf_8270_1.png

For now it will update every 1 hour, and for now i will leave it updating, 
maybe Stefan would like to draw another nice bright line there?

VY 73

Jacek / SQ5BPF


On Sat, 19 Jan 2019, DK7FC wrote:

> Date: Sat, 19 Jan 2019 19:47:27 +0100
> From: DK7FC <selberdenken@posteo.de>
> Reply-To: rsgb_lf_group@blacksheep.org
> To: rsgb_lf_group@blacksheep.org
> Subject: VLF: Night-transmission on 8270.1 Hz
> 
> Hi VLF,
>
> Since 18:14 UTC i am transmitting on the ground loop antenna again, this time 
> on 8270.1 Hz, where RN3AUS is watching from near Moscow! After the recent 
> very strong signal at SQ5BPF in 976 km distance i like to know if the signal 
> can make the 2040 km path to Alex as well? It is in the same direction that 
> SQ5BPF but more than twice the distance. Will this work? Because the antenna 
> is beaming towards Paul and has its null into the direction to SQ5BPF and 
> RN3AUS. Anyway the strong signal in Poland...
>
> Now i'm sitting in my car here, the sky is clear, the moon is full and it is 
> below 0 C here. I have some tea which is still warm, more or less. The DC 
> measurement at the loop tells it has just 57.5 Ohm at f=0! That is the lowest 
> value i measured so far.
> The accu display tells me: 12.8V, 40.9A, 524 W, 85% rest capacity and about 
> 2.5 hours rest time left at this power level. I can measure the antenna 
> current with a Rohde&Schwarz scope using the spectrum analyzer function. It 
> tells me -6.3 dBV of the fundamental frequency, measured across a 0.2 Ohm 
> shunt resistor, so that is equal to 2.42 A antenna current.
>
> Unfortunately the frequency is not covered by Paul's excellent grabber. Maybe 
> he can give some informations about the signal strength? It should be my 
> strongest signal since the kite experiments in 2011.
>
> The carrier will stay on the air for 2 hours.
>
> Al reports are welcome.
>
> 73, Stefan
>
> PS: Feet and tea cold now...
>
>
>