Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: VLF KL7L 8.97 kHz

To: [email protected]
Subject: Re: LF: VLF KL7L 8.97 kHz
From: Stefan Schäfer <[email protected]>
Date: Wed, 13 Nov 2013 12:46:18 +0100
Authentication-results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of [email protected]) smtp.mail=[email protected]
Delivered-to: [email protected]
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3
Hi Laurence,

They installed a 2.5 MW wind power plant exactly where i've done my experiments in 2010/11. Obviously it is a good QTH when you need wind :-) So i cannot use that QTH any more. I would need to find a new one.

I don't want to say that the VLF times are over for me, maybe there will come another season sometime. A lot can be done! :-)

What about your location in AK? Is there no chance that YOU begin to do some TX experiments, by using an "earth antenna" (uuuh, some excitement grows in me when thinking back)? You should have the place to install a very long one! You just need some wire, maybe 1...2mm diameter and some 100m long. A dipole would be interesting. Maybe you can use it for other bands as well! If i would live close to a forest, a lonely forest (here they seem to clean it and cut some trees here and there to sell them periodically!), i would have such an antenna and i would add 100m pieces to the ends from time to time :-)

With 700m wire and 250 W RF power i made 45km in DFCW-600. So if the dipole ends are close to your home QTH (actually you can use a simple long wire, not a dipole, then you will need just one /p ground made of earth rods), then you can run 1 or 2 kW (or 3 :-) ) and your home earth system is the first end of the radiator. 2 kW against 250W is +12 dB. Since you are not limited in time (like me, when beeing /p with that small generator), people can try in "DFCW-60000" or 47 uHz! Another 20 dB! :-) And if you use a 7000m wire, is it then 10x the loop area? Would that be another 20 dB? :-)

Maybe you can gain VE7BDQ or VE7TIL (you remember?) and some other stations in a range below 1000 km for first tests! :-)

BTW without the need for a loading coil of several 100 mH there is no sound that nerves the XYL so it's very friendly to all :-)

Give it a try! +100m each week!

And keep us informed about the progress!

73, Stefan/DK7FC



Am 13.11.2013 06:14, schrieb Laurence KL7 L:





Subject: VLF DK7FC ?

Stefan – is there any (any?)  chance we can persuade you to goto your favorite field 
location and shove up the Kite again over the winter period for another run at VLF over the 
Pole  – Ive improved my s/n here down in the lower reaches and you never know?

Thanks
Long haul up here at the moment is just awful – pretty auroras and snow….
Laurence (and others!) kl7l



<Prev in Thread] Current Thread [Next in Thread>