Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 44EA038000145; Sun, 14 Aug 2011 17:14:02 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QshzE-0001ai-4o for rs_out_1@blacksheep.org; Sun, 14 Aug 2011 22:12:48 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QshzD-0001aZ-CI for rsgb_lf_group@blacksheep.org; Sun, 14 Aug 2011 22:12:47 +0100 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QshzB-0003ku-SJ for rsgb_lf_group@blacksheep.org; Sun, 14 Aug 2011 22:12:47 +0100 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id p7ELCi32019644 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 14 Aug 2011 23:12:45 +0200 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 p7ELCiA4009062 for ; Sun, 14 Aug 2011 23:12:44 +0200 Message-ID: <4E48398A.9020704@iup.uni-heidelberg.de> Date: Sun, 14 Aug 2011 23:09:30 +0200 From: =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= 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: <68BE37BD69E54DEE89CEBA8E30E9B94E@PcMinto> <4E47FFE9.10100@iup.uni-heidelberg.de> <3ED8E5422F1F45DBB8186E9D9870AD63@PcMinto> <4E480E02.9020706@iup.uni-heidelberg.de> <938BF599006244949F6CDDB5BA91F347@PcMinto> In-Reply-To: <938BF599006244949F6CDDB5BA91F347@PcMinto> X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: LF: Ferrite RX antennas Content-Type: multipart/alternative; boundary="------------090500060708050607030908" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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: 0:2:427946656:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d41194e483a9a5ab5 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------090500060708050607030908 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id p7ELCi32019644 Hm yes, maybe. But if you are outside in the nature (thinking about a=20 total /p station consisting out of that antenna and a sensitive RX, a=20 netbook running SL and a 70cm handheld TRX, and sitting on a bank=20 watching the sky!) where no man made QRM is and point the antenna to the=20 wanted signal... The DCF77 clock antennas at home are probably often=20 pointing somewhere, rather to the neighbours PC instead to Mainflingen. And it must be a large rod or probably many of them in parallel and=20 seriell using a LNA as well. Must be separated from the SL running PC. I assume many have tried this before, most probably some of the=20 reflector members too. Further comments? 73, Stefan/DK7FC Am 14.08.2011 21:43, schrieb Minto Witteveen: > > I haven=E2=80=99t thought about ferrite RX antenna for LF=E2=80=A6.My g= uess is that it=20 > is not going to work =E2=80=93 not without an external antenna coupled = to the=20 > ferrite, and then what=E2=80=99s the point? > DCF77 clocks often have trouble locking indoors or in the neighborhood=20 > of =E2=80=98QRM=E2=80=99 generators like PC=E2=80=99s, and look what po= wer DCF77 is using=E2=80=A6 > I could be entirely wrong of course=E2=80=A6 > > 73=E2=80=99 Minto pa3bca > > *From:* Stefan Sch=C3=A4fer > *Sent:* Sunday, August 14, 2011 20:03 > *To:* rsgb_lf_group@blacksheep.org > *Subject:* Re: LF: Re: 137 grabbers > > BTW what do you think about a ferrite RX antenna for LF? Now i'm=20 > opening an older discussion i expect ;-) > > 73, Stefan/DK7FC > > --------------090500060708050607030908 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id p7ELCi32019644 Hm yes, maybe. But if you are outside in the nature (thinking about a total /p station consisting out of that antenna and a sensitive RX, a netbook running SL and a 70cm handheld TRX, and sitting on a bank watching the sky!) where no man made QRM is and point the antenna to the wanted signal... The DCF77 clock antennas at home are probably often pointing somewhere, rather to the neighbours PC instead to Mainflingen.
And it must be a large rod or probably many of them in parallel and seriell using a LNA as well. Must be separated from the SL running PC. I assume many have tried this before, most probably some of the reflector members too.

Further comments?

73, Stefan/DK7FC

Am 14.08.2011 21:43, schrieb Minto Witteveen:

I haven=E2=80=99t thought about ferrite RX antenna for = LF=E2=80=A6.My guess is that it is not going to work =E2=80=93 not without an external a= ntenna coupled to the ferrite, and then what=E2=80=99s the point?
DCF77 clocks often have trouble locking indoors or in the neighborhood of =E2=80=98QRM=E2=80=99 generators like PC=E2=80=99s, and look what powe= r DCF77 is using=E2=80=A6
I could be entirely wrong of course=E2=80=A6

73=E2=80=99 Minto pa3bca

=C2=A0
Sent: Sunday, August 14, 2011 20:03
Subject: Re: LF: Re: 137 grabbers
=C2=A0
<snip>
BTW what do you think about a ferrite RX antenna for LF? Now i'm opening an older discussion i expect ;-)

73, Stefan/DK7FC


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