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Date: Sat, 22 Oct 2011 23:37:32 +0200
From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= <Stefan.Schaefer@iup.uni-heidelberg.de>
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Subject: Re: LF: A test of cmsk on "the dreamers band"
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Hi Steinar,

Am 22.10.2011 21:40, schrieb Steinar Aanesland:
> Hi Stefan,
>
> First, I apologize for not answering before.
>    
No problem.

> My latest experiment is with an Earth dipole. I'm
> using a 1-meter copper pipe in the ground as one end of the dipole. The
> other is connected to water pipes in my house. The distance between them
> is about 20m. As a PA I am now using a 150W power amplifier from HH
> Electronic (V150-L). This has a 100volts line output (100W RMS at 1 kHz
> into 100ohm). I have tested different modes; MSK01 with SpecLab, WOLF,
> THROBX and PSKAM10 in Multipsk. ZL2AFP's CMSK8, and various versions of
> qrss. Right now, I am sending in the qrss120 on 8970 and hoping that an
> amateur friend of my about 10 km away, will receive me.
>    

Oh it is very good to have someone in 10km distance. That is much 
worth!! Will he set up a TX too? Keep us informed about your progress.
But 10km is not easy with such an antenna. I got 46km in DFCW-600 with a 
600m (!) antenna and 250W RF at 8970 Hz.
Anyway, good luck!
What is the RX of the distant station?
Would you like to set up a RX for VLF, or the distant station, which 
allows to receive my signal in some weeks (if the wind likes to blow 
from southwest during a weekend without rain)? If you live in a 
reasonable location, i see no problems to get a successful reception, 
even in DFCW-60.
> My antenna receiving systems on VLF is not the best. I use my 10X10m
> loop in the garden. With this I can receive the Alphas pretty well, but
> now I am building an active antenna (after your drawing). It will be
> exciting to see how it will work in my neighborhood. I hope it does not
> pick up too much noise.
>    
OK, fine. Then you can receive me! :-) I should read the mails before i 
start to answer ;-)
The loop may have advantages anyway, depending on your local situation. 
It is good to compare E and H field.
Ah BTW, soon there is a SAQ transmission, on monday! That should be no 
problem at all to receive in CW!! Ask if you need further advice for 
setting up a RX if not done so far. This is a good chance to compare 
both antenna systems too!
Also the world wide military MSK transmitters give good ideas about the 
sensitivity, not to forget the sferics as a function of daytime...
> Best regards and 73
>
> Steinar LA5VNA
> LOC: JO59JQ
>    
Steinar, we could do that first VLF DL-LA detection over a distance of 
1149 km, http://no.nonsense.ee/qthmap/?qth=JO59JQ&from=jn49ik. I am very 
optimistic, a DREAMER ;-)

Also i need a kick to come on the VLF band again i must admit ;-) LF 
takes most of my attention since i have that fixed antenna ;-)

Best 73, fun and good luck!

Stefan/DK7FC