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To: rsgb_lf_group@blacksheep.org
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From: Markus Vester <markusvester@aol.com>
Message-Id: <8CEDDF3DC494AF4-11CC-DF33@webmail-m170.sysops.aol.com>
Date: Sun, 1 Apr 2012 03:54:55 -0400 (EDT)
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Good morning Wolf, LF,

thanks for the hint on the OAM antenna. No, the work of our group is not re=
lated to the Navy, and our sub-ground antenna concept is not based on the w=
ell known but disputed Bockshorn effect. Our antenna is actually very narro=
wband and cannot easily be retuned, which so fare has made it difficult to =
impose any significant modulation on the carrier.=20

However there is a similarity in we are also radiating a circular polarized=
 field - not unlike the former 76 Hz antenna pair in the US.

Best 73,
Markus



-----Urspr=C3=BCngliche Mitteilung-----=20
Von: wolf_dl4yhf <dl4yhf@freenet.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 1 Apr 2012 6:52 am
Betreff: Re: ULF: 11.6 =C2=B5Hz transmission


Hello Markus and group,

I will certainly look out for the signal. Only have to modify the soundcard=
's input coupling capacitor a tiny bit, guess I must connect a second capac=
itor in parallel. But sure there is something suitable in the junk-box.=20
Are you, by chance, using a modified OAM antenna for transmission as used b=
y the German Navy near the danish border (see Peter's article). If so, is t=
he inner circle's rotation frequency equal to the transmit frequency ?

Good luck and all the best,
  Wolf .



Am 01.04.2012 08:28, schrieb Markus Vester:=20
Dear LF,
=20
in a joint project including a number of radio amateurs, our group is worki=
ng on a large experimental earth-antenna system, which is able to radiate a=
n ultra-low frequency signal at low power.=20
=20
We are currently transmitting an unmodulated test carrier on 11.60576 =C2=
=B5Hz, and (according to our measurements) are achieving a radiated power o=
f 16 microwatts. Frequency stability is on the order of 1e-8, which should =
enable narrow bandwidth observations with high sensitivity.
=20
The transmission has been on air for a while. Any reception reports (especi=
ally of far-field detections) would be much appreciated.
=20
Best 73,

Markus (DF6NM)




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<font color=3D'black' size=3D'2' face=3D'arial'>
<div>Good morning Wolf, LF,</div>


<div>&nbsp;</div>


<div>thanks for the hint on the OAM antenna. No, the work of our group is n=
ot related to the Navy, and our sub-ground antenna concept is not based on =
the well known but disputed Bockshorn effect.&nbsp;Our antenna is actually =
very narrowband and cannot easily be retuned,&nbsp;which so fare has made&n=
bsp;it difficult to impose&nbsp;any significant modulation on the carrier. =
</div>


<div>&nbsp;</div>


<div>However there is a similarity in we are&nbsp;also radiating a circular=
 polarized field - not unlike the former 76 Hz antenna pair in the US.</div=
>


<div>&nbsp;</div>


<div>Best 73,</div>


<div>Markus<br>
<br>
<br>
</div>


<div style=3D"FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: arial,helvetica">=
-----Urspr=C3=BCngliche Mitteilung----- <br>
Von: wolf_dl4yhf &lt;dl4yhf@freenet.de&gt;<br>
An: rsgb_lf_group &lt;rsgb_lf_group@blacksheep.org&gt;<br>
Verschickt: So, 1 Apr 2012 6:52 am<br>
Betreff: Re: ULF: 11.6 =C2=B5Hz transmission<br>
<br>


<div id=3DAOLMsgPart_1_a4dd942f-5e8d-4ee9-9163-d3f340c7440a>Hello Markus an=
d group,<br>
<br>
I will certainly look out for the signal. Only have to modify the soundcard=
's input coupling capacitor a tiny bit, guess I must connect a second capac=
itor in parallel. But sure there is something suitable in the junk-box. <br=
>
Are you, by chance, using a modified OAM antenna for transmission as used b=
y the German Navy near the danish border (see Peter's article). If so, is t=
he inner circle's rotation frequency equal to the transmit frequency ?<br>
<br>
Good luck and all the best,<br>
&nbsp; Wolf .<br>
<br>
<br>
<br>
Am 01.04.2012 08:28, schrieb Markus Vester:=20
<BLOCKQUOTE type=3D"cite"><FONT face=3Darial color=3Dblack size=3D2>

<div>Dear LF,</div>


<div>&nbsp;</div>


<div>in a joint project including a number of radio amateurs, our group is =
working on a large experimental earth-antenna system, which is able to radi=
ate an ultra-low frequency signal at low power. </div>


<div>&nbsp;</div>


<div>We are currently transmitting an unmodulated test carrier on 11.60576 =
=C2=B5Hz, and (according to our measurements) are achieving a radiated powe=
r of 16 microwatts. Frequency stability is on the order of 1e-8, which shou=
ld enable narrow bandwidth observations with high sensitivity.</div>


<div>&nbsp;</div>


<div>The transmission has been on air for a while. Any reception reports (e=
specially of far-field detections) would be much appreciated.</div>


<div>&nbsp;</div>


<div>Best 73,<br>
</div>


<div>Markus (DF6NM)<br>
</div>
</FONT></BLOCKQUOTE><br>
</div>
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