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	<4E8849B5.7080800@broadpark.no>
Date: Sun, 2 Oct 2011 13:32:34 +0100
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From: Roger Lapthorn <rogerlapthorn@gmail.com>
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: A test of cmsk on "the dreamers band"
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Good work Steinar.

Please keep us posted here and on the Sub9kHz Yahoo group.

73s
Roger G3XBM

On 2 October 2011 12:23, Steinar Aanesland <saanes@broadpark.no> wrote:

> Hi all,
>
> I am new to the group and on top of that Norwegian so please be nice to
> me,  my English is not the best.
>
> The last few days I've been doing some digi mode testing at 8.97 khz;
> "dreamers band", mostly with use of the QRSS mode.
>
> On the transmitter side, I have been using a 5 turn 10 x 10 m antenna
> and an audio amplifier 100W. The system is feeded with a signal from the
> program "Spectrum Lab".
>
> On the receiver side, I have been using a 70 x 70 cm 60 turns loop,
> tuned with a capacitor. The loop was connected to the microphone input
> on my laptop and decoded with "Spectrum Lab".
>
> The result has been interesting . With this simple arrangement, I have
> reach a distance of 2.5 km.
>
> Yesterday I tried out CMSK8 made by ZL1BPU  Murray. I had to make some
> changes in the ini-file to get the CMSK work om 8.97khz. The sampling
> rate was adjusted with the program CheckSR and the transmitting
> frequency was set to 8970Hz.  Waterfall has a 2000Hz limit so this was
> black and useless on 8790Hz.
>
> It would makes it easier to track the signal if the developer could
> extend waterfall to 10 kHz. I am aware that one can get the view of the
> waterfall by going down in frequency, but 8.97khz has become a de facto
> water hole of VLF .
>
> The result was exciting. A clean copy of the signal was received at
> about 2 km.
>
> I would also try to test out some of the VLF mode in multipsk ,
> especially  PSK10 and PSKAM10,  but I have not find a way to fool the
> program to work on 8.97Khz yet.
>
> 73 and good dx the VLF Steinar la5vna
>
>
>
>
>
>
>
>
>


-- 
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http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/

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Good work Steinar. <br><br>Please keep us posted here and on the Sub9kHz Ya=
hoo group.<br><br>73s<br>Roger G3XBM<br><br><div class=3D"gmail_quote">On 2=
 October 2011 12:23, Steinar Aanesland <span dir=3D"ltr">&lt;<a href=3D"mai=
lto:saanes@broadpark.no">saanes@broadpark.no</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p=
x #ccc solid;padding-left:1ex;">Hi all,<br>
<br>
I am new to the group and on top of that Norwegian so please be nice to<br>
me, =A0my English is not the best.<br>
<br>
The last few days I&#39;ve been doing some digi mode testing at 8.97 khz;<b=
r>
&quot;dreamers band&quot;, mostly with use of the QRSS mode.<br>
<br>
On the transmitter side, I have been using a 5 turn 10 x 10 m antenna<br>
and an audio amplifier 100W. The system is feeded with a signal from the<br=
>
program &quot;Spectrum Lab&quot;.<br>
<br>
On the receiver side, I have been using a 70 x 70 cm 60 turns loop,<br>
tuned with a capacitor. The loop was connected to the microphone input<br>
on my laptop and decoded with &quot;Spectrum Lab&quot;.<br>
<br>
The result has been interesting . With this simple arrangement, I have<br>
reach a distance of 2.5 km.<br>
<br>
Yesterday I tried out CMSK8 made by ZL1BPU =A0Murray. I had to make some<br=
>
changes in the ini-file to get the CMSK work om 8.97khz. The sampling<br>
rate was adjusted with the program CheckSR and the transmitting<br>
frequency was set to 8970Hz. =A0Waterfall has a 2000Hz limit so this was<br=
>
black and useless on 8790Hz.<br>
<br>
It would makes it easier to track the signal if the developer could<br>
extend waterfall to 10 kHz. I am aware that one can get the view of the<br>
waterfall by going down in frequency, but 8.97khz has become a de facto<br>
water hole of VLF .<br>
<br>
The result was exciting. A clean copy of the signal was received at<br>
about 2 km.<br>
<br>
I would also try to test out some of the VLF mode in multipsk ,<br>
especially =A0PSK10 and PSKAM10, =A0but I have not find a way to fool the<b=
r>
program to work on 8.97Khz yet.<br>
<br>
73 and good dx the VLF Steinar la5vna<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
</blockquote></div><br><br clear=3D"all"><br>-- <br><a href=3D"http://g3xbm=
-qrp.blogspot.com/" target=3D"_blank">http://g3xbm-qrp.blogspot.com/</a><br=
><a href=3D"http://www.g3xbm.co.uk" target=3D"_blank">http://www.g3xbm.co.u=
k</a><br>
<a href=3D"http://www.youtube.com/user/g3xbm" target=3D"_blank">http://www.=
youtube.com/user/g3xbm</a><br><a href=3D"https://sites.google.com/site/sub9=
khz/" target=3D"_blank">https://sites.google.com/site/sub9khz/</a><br><br>

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