Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb05.r1000.mx.aol.com (Internet Inbound) with ESMTP id AA94338000085; Sat, 26 Nov 2011 07:48:08 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RUHfG-0002rg-Ot for rs_out_1@blacksheep.org; Sat, 26 Nov 2011 12:47:30 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RUHfG-0002rX-86 for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 12:47:30 +0000 Received: from relay2.uni-heidelberg.de ([129.206.210.211]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RUHfF-0000oj-L2 for rsgb_lf_group@blacksheep.org; Sat, 26 Nov 2011 12:47:30 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay2.uni-heidelberg.de (8.13.8/8.13.8) with ESMTP id pAQClSup028099 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sat, 26 Nov 2011 13:47:28 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id pAQClSRs017903 for ; Sat, 26 Nov 2011 13:47:28 +0100 Message-ID: <4ED0DF8A.5060505@iup.uni-heidelberg.de> Date: Sat, 26 Nov 2011 13:46:02 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <66E491BAB91C48AF81191F4022525A14@DennisPC> <6FE757960E6C447781689D4F19A315AE@DennisPC> <4EC2C6EB.2080201@iup.uni-heidelberg.de> <4EC2DB14.9000807@talktalk.net> <4ECFD8B6.2050601@iup.uni-heidelberg.de> <4ECFEA18.7080608@broadpark.no> <4ECFEBD3.8020506@iup.uni-heidelberg.de> <4ECFF142.2050902@broadpark.no> <4ECFFB63.6090406@iup.uni-heidelberg.de> <01a701ccabb8$4c255930$e4700b90$@simnet.is> In-Reply-To: <01a701ccabb8$4c255930$e4700b90$@simnet.is> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: VLF: 8970 Hz transmissions, soon again here Content-Type: multipart/alternative; boundary="------------090508010607050100080906" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.2 required=5.0 tests=HTML_50_60,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:473317216:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60194ed0e008145a X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------090508010607050100080906 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay2.uni-heidelberg.de id pAQClSup028099 Steinar, Halldor, VLF, Yes, that's true. I already included a frequency lock to DHO38 in that=20 usr file. Maybe worth to check of it shows the OK field. WX looks a bit unstable here, overcast! But the web says there will be=20 no rain. I will start now preparing the setup which is much less effort=20 than on a /p activity of course :-) And i have internet during the test := -) 73, Stefan Am 25.11.2011 22:22, schrieb Halld=F3r: > > Steinar > > When starting my grabber Stefan and Chris thought me some tricks: > > "and use the sample rate detector to lock your sound card to a stable=20 > signal" > > That helps if you are using the 60000 window. > > 73 > > Halld=F3r > > TF3HZ > > *From:* owner-rsgb_lf_group@blacksheep.org=20 > [mailto:owner-rsgb_lf_group@blacksheep.org] *On Behalf Of *Stefan Sch=E4= fer > *Sent:* 25. n=F3vember 2011 20:33 > *To:* rsgb_lf_group@blacksheep.org > *Subject:* Re: VLF: 8970 Hz transmissions, soon again here > > Steinar, > > 600 s/pix. is a good start point for tmw but i would suggest to use a=20 > even narrower FFT bin width like 424 uHz. Also a well configured noise=20 > blanker can easily help to get another 6 dB S/N as we have seen in the=20 > past. > > I attach you a "DFCW-6000.usr" which you can load into SpecLab. This=20 > was used successfully in many last experiments on many grabbers :-) > > Not you have to wait some 10 minutes until the first pixel appears so=20 > do not wonder ;-) > > 73, Stefan/DK7FC > > Am 25.11.2011 20:49, schrieb Steinar Aanesland: > > > Stefan > > I had plans to use 600 sec/step 1mHz res. you will find under "quick=20 > settings/Slow Morse(..)" in SpecLab, but f you have a better solution,=20 > I will be happy to try it. > > la5vna S > > > > Den 25.11.2011 20:26, skrev Stefan Sch=E4fer: > > Thanks Steinar, > > > > But it will be a first pre-test, i may not get the maximum strength=20 > that i want but we'll see. > > > > How do you receive 8970 Hz on the software side? Do you have a=20 > "DFCW-6000.usr" for the SpecLab settings or how did you configure the=20 > software (which?)? > > > > 73, Stefan > > > > Am 25.11.2011 20:18, schrieb Steinar Aanesland: > >> > >> I will try to capture you Stefan , but I am afraid I got too much=20 > noise here to get a good result :( > >> > >> LA5VNA S > >> > >> > >> > --------------090508010607050100080906 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Steinar, Halldor, VLF,

Yes, that's true. I already included a frequency lock to DHO38 in that usr file. Maybe worth to check of it shows the OK field.

WX looks a bit unstable here, overcast! But the web says there will be no rain. I will start now preparing the setup which is much less effort than on a /p activity of course :-) And i have internet during the test :-)

73, Stefan


Am 25.11.2011 22:22, schrieb Halldór:

 

Steinar

 

When starting my grabber Stefan and Chris thought me some tricks:

 

“and use the sample rate detector to lock your sound card to a stable signal”

 

That helps if you are using the 60000 window.

 

73

Halldór

TF3HZ

 

From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Stefan Schäfer
Sent: 25. nóvember 2011 20:33
To: rsgb_lf_group@blacksheep.org
Subject: Re: VLF: 8970 Hz transmissions, soon again here

 

Steinar,

600 s/pix. is a good start point for tmw but i would suggest to use a even narrower FFT bin width like 424 uHz. Also a well configured noise blanker can easily help to get another 6 dB S/N as we have seen in the past.

I attach you a "DFCW-6000.usr" which you can load into SpecLab. This was used successfully in many last experiments on many grabbers :-)

Not you have to wait some 10 minutes until the first pixel appears so do not wonder ;-)

73, Stefan/DK7FC

Am 25.11.2011 20:49, schrieb Steinar Aanesland:


Stefan

I had plans to use  600 sec/step 1mHz res. you will find  under "quick settings/Slow Morse(..)" in SpecLab, but f you have a better solution, I will be happy to try it.

la5vna S



Den 25.11.2011 20:26, skrev Stefan Schäfer:
> Thanks Steinar,
>
> But it will be a first pre-test, i may not get the maximum strength that i want but we'll see.
>
> How do you receive 8970 Hz on the software side? Do you have a "DFCW-6000.usr" for the SpecLab settings or how did you configure the software (which?)?
>
> 73, Stefan
>
> Am 25.11.2011 20:18, schrieb Steinar Aanesland:
>>
>> I will try to capture you Stefan , but I am afraid I got too much noise here to get a good result :(
>>
>> LA5VNA S
>>
>>
>>

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