LF: Re: TA DX on the dreamers band?

["Alan Melia" <alan.melia@btinternet.com>]

Hi Stefan, Mmmm I suppose I put my head right into the noose there :-))

I think this is a difficult one. I am sure the ideal time would be just
before sunset in Canada or just before dawn in Europe. That is not much of a
help as flying kites at those times is not really feasible  :-))   Thinking
more generally I would say the best time in a daylight path might be mid-day
at mid path.....but that is only a "gut feeling". But in daytime, summer
might be better for daytime propagation than winter (not allowing for
seasonal noise variation) ......I'm ducking and diving and hedging by bets
:-))

It could be Paul's waveguide propagation equations would give helpful
answers. If only to calculate the approximate signal levels to compare with
the previous tests. Its 4 times further that suggest 16 times the ERP or
"capability" of the system. Hopefully if the VLF effect helps it might only
need be nearer to 6 to 8dB. There may also be a limitation to how narrow a
bandwidth you can use on reception on a path of this length.

I am watching with interest, this is quite a new area, and you can't beat
experimentation. If that don't fit the theory..... you have to devise a new
theory ....not junk the measurements, because you cant argue with
measurement.

Best Wishes
Alan G3NYK

----- Original Message ----- 
From: "Stefan Schäfer" <Stefan.Schaefer@iup.uni-heidelberg.de>
To: <rsgb_lf_group@blacksheep.org>
Sent: Thursday, July 08, 2010 1:23 PM
Subject: VLF: TA DX on the dreamers band?


> Alan,
>
> Which time (UTC) would be your recommendation for trying a transatlantic
> DX reception on 9 kHz, say to canada?
> Any ideas?
>
> Other experts are asked as well here!
>
>
>