Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-df06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 1B07D380000B6; Sun, 14 Aug 2011 17:45:40 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QsiU9-0001oq-Ls for rs_out_1@blacksheep.org; Sun, 14 Aug 2011 22:44:45 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QsiU8-0001oh-TO for rsgb_lf_group@blacksheep.org; Sun, 14 Aug 2011 22:44:44 +0100 Received: from outbound-jn.vgs.untd.com ([64.136.55.20]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1QsiU5-0004Gc-Dg for rsgb_lf_group@blacksheep.org; Sun, 14 Aug 2011 22:44:44 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juno.com; s=alpha; t=1313358273; bh=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=; l=0; h=To:Date:Subject:Message-ID:Content-Type:From; b=P/n04Y9NO1kq9E7gWVWIWTCutu3Gg8xt0HDTDknozDhkbCNwaF2c3eI7EWsLA+LQ8 jWtQXEGOce7rXeQqG/yYmhOV/vRdvil5Y/voIogBfqNVC2zJHiENHuzQfH8z4Y9ypP 0F7VsMurBPtbNVgTtLzWq6e8F6aS7Od5mlQM7FOE= X-UOL-TAGLINE: true Received: from outbound-jn.vgs.untd.com (localhost [127.0.0.1]) by m03.vgs.untd.com with SMTP id AABHESSP2AWE2WES for (sender ); Sun, 14 Aug 2011 14:44:24 -0700 (PDT) X-UNTD-OriginStamp: yokUgcxCbtTP7XLrpefewLPECJ/l6Jzwp+BEpER5oFjnqwb1Inl4CQ== Received: (from riese-k3djc@juno.com) by m03.vgs.untd.com (jqueuemail) id RJPS33EM; Sun, 14 Aug 2011 14:43:59 PDT To: rsgb_lf_group@blacksheep.org Date: Sun, 14 Aug 2011 17:35:45 -0400 Message-ID: <20110814.174327.1916.3.riese-k3djc@juno.com> X-Mailer: Juno 5.0.49 MIME-Version: 1.0 X-Juno-Line-Breaks: 8-6,8,10-11,13-18,20,26,28,30-36,39,41-50,52-53,54-32767 From: riese-k3djc@juno.com X-UNTD-BodySize: 6811 X-ContentStamp: 14:7:2739466130 X-MAIL-INFO:38418d75f8485cd1adf8e971953895dc98984df9b51c89219ce8f1014d68e8f1699c4d15cc092c5d9c2d61dc1c7945cc25ac7dd56cfc29001dbdc819297d458d2cbd0129e1d939583c X-UNTD-Peer-Info: 127.0.0.1|localhost|outbound-jn.vgs.untd.com|riese-k3djc@juno.com X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,NO_REAL_NAME=0.55,UNPARSEABLE_RELAY=0.001 Subject: Re: LF: Ferrite RX antennas Content-Type: multipart/alternative; boundary=--__JNP_000_19a7.65b4.4e55 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.3 required=5.0 tests=HTML_30_40,HTML_FONTCOLOR_BLUE, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE,NO_REAL_NAME 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: 1:2:472052640:93952408 X-AOL-SCOLL-URL_COUNT: 1 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m288.2 ; domain : juno.com DKIM : pass x-aol-sid: 3039ac1d40da4e4842044c1f X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ----__JNP_000_19a7.65b4.4e55 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit I made a ferrite antenna using several rods to make something an inch in Dia and perhaps 8 inches long was able to get it to tune to 100 K or so with a large var cap and switching in fixed cap using a LW radio it works well and does a good job at 500 Khz managed to get 10, 6 Inch ferrites at a hamfest fer a buck a peace,, still kick M self for not buying all he had never did a DX spot with it but it works well Bob K3DJC On Sun, 14 Aug 2011 23:09:30 +0200 =?UTF-8?B?U3RlZmFuIFNjaMOkZmVy?= writes: 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’t thought about ferrite RX antenna for LF….My guess is that it is not going to work – not without an external antenna coupled to the ferrite, and then what’s the point? DCF77 clocks often have trouble locking indoors or in the neighborhood of ‘QRM’ generators like PC’s, and look what power DCF77 is using… I could be entirely wrong of course… 73’ Minto pa3bca From: Stefan Schäfer 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 opening an older discussion i expect ;-) 73, Stefan/DK7FC ____________________________________________________________ Penny Stock Jumping 3000% Sign up to the #1 voted penny stock newsletter for free today! http://thirdpartyoffers.juno.com/TGL3141/4e4841b8b27895013cm03vuc ----__JNP_000_19a7.65b4.4e55 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable =EF=BB=BF
I made a ferrite antenna using several rods to make something an&nb= sp;inch = in Dia and perhaps 8 inches long
was able to get it to tune to 100 K or so with a large var cap and = = switching in fixed cap
using a LW radio it works well and does a good job at 500 Khz
=
managed to get 10, 6 Inch ferrites at a hamfest fer a buck a peace,= , still = kick M self for not buying all he had
never did a DX spot with it but it works well
 
Bob K3DJC
 
 
On Sun, 14 Aug 2011 23:09:30 +0200 =3D?UTF-8?B?U3RlZmFuIFNjaMOkZmVy= ?=3D <Stefan.Schaefer@iu= p.uni-heidelberg.de> = writes:
Hm yes, maybe. But if you are outside in the nature (thinking abo= ut 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, ra= ther to = the neighbours PC instead to Mainflingen.
And it must be a large ro= d or = probably many of them in parallel and seriell using a LNA as well. Mus= t be = separated from the SL running PC.
I assume many have tried this bef= ore, = most probably some of the reflector members too.

Further = comments?

73, Stefan/DK7FC

Am 14.08.2011 21:43, schrieb = Minto = Witteveen:

<= FONT = face=3DCalibri>I haven=E2=80=99t thought about ferrite RX antenna fo= r LF=E2=80=A6.My guess is = that it is not going to work =E2=80=93 not without an external anten= na coupled to = the ferrite, and then what=E2=80=99s the point?
DCF77 clocks ofte= n have trouble = locking indoors or in the neighborhood of =E2=80=98QRM=E2=80=99 gene= rators like PC=E2=80=99s, and = look what power DCF77 is using=E2=80=A6
I could be entirely wrong= of = course=E2=80=A6

<= FONT = face=3DCalibri>73=E2=80=99 Minto pa3bca

=
 
Sent: Sunday, August 14, 2011 20:03
Subject: Re: LF: Re: 137 grabbers
 
<snip>
BTW what do you think about a f= errite RX = antenna for LF? Now i'm opening an older discussion i expect ;-)
=
73, = Stefan/DK7FC


=
 


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