Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,HTML_MESSAGE,RCVD_IN_DNSWL_MED, RCVD_IN_SORBS_SPAM,SPF_PASS,T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v04B7ojV027974 for ; Wed, 4 Jan 2017 12:07:51 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cOjMK-0002ed-Rt for rs_out_1@blacksheep.org; Wed, 04 Jan 2017 11:03:56 +0000 Received: from [195.171.43.34] (helo=relay2.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cOjMK-0002eU-37 for rsgb_lf_group@blacksheep.org; Wed, 04 Jan 2017 11:03:56 +0000 Received: from omr-m007e.mx.aol.com ([204.29.186.9]) by relay2.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.87) (envelope-from ) id 1cOjMG-0007n6-Nr for rsgb_lf_group@blacksheep.org; Wed, 04 Jan 2017 11:03:54 +0000 Received: from mtaomg-aae01.mx.aol.com (mtaomg-aae01.mx.aol.com [172.27.1.99]) by omr-m007e.mx.aol.com (Outbound Mail Relay) with ESMTP id 43A733800089 for ; Wed, 4 Jan 2017 06:03:49 -0500 (EST) Received: from core-ace09g.mail.aol.com (core-ace09.mail.aol.com [172.27.23.9]) by mtaomg-aae01.mx.aol.com (OMAG/Core Interface) with ESMTP id EEC3F38000089 for ; Wed, 4 Jan 2017 06:03:48 -0500 (EST) Received: from 80.146.228.71 by webprd-a103.mail.aol.com (10.72.52.242) with HTTP (WebMailUI); Wed, 04 Jan 2017 06:03:42 -0500 Date: Wed, 4 Jan 2017 06:03:47 -0500 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15969263072-57d5-1a173@webprd-a103.mail.aol.com> In-Reply-To: <586CC8D3.90706@posteo.de> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [80.146.228.71] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1483527829; bh=TKxD3H22KOvhkz6ZpHDLd0GImbpvhsMNhc37a/ZxjIU=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=adXJ8YYX+TSmYJEfXxoyi/BhcdHn3IYA8+FL1mgu/zL9KCGKhfAjvGPPMuqh81HVW oO8S8lBKYhtumP7bLASqI4Qsa2v9kIugFclEccJ0pfbDihZ8dW5wcOJkiWt4GmlYtD BQ1DL7Mmg6kZQaqGipfmW0N81Wx9XJI9ceGh2O6o= x-aol-sid: 3039ac1b0163586cd6944fe4 X-Scan-Signature: 60b21f5b7eb190e65b65540006a87038 Subject: Re: LF: VLF with two small loops. Content-Type: multipart/alternative; boundary="----=_Part_133526_47396850.1483527822492" 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-Scanned-By: MIMEDefang 2.75 Status: RO X-Status: X-Keywords: X-UID: 10103 ------=_Part_133526_47396850.1483527822492 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Editing the url slightly (www -> dl, remove the ? appendix) bypasses the cu= mbersome pre-download page: https://dl.dropbox.com/s/9x26r4x4ifx3rzr/4%20m%20loops.zip Another option would be more turns on the primary and secondary (e.g. 3 and= 36). The idea is that the primary inductance of the transformer should be = (much) greater than that of the single-turn loop. Best regards, Markus (DF6NM) -----Urspr=C3=BCngliche Mitteilung-----=20 Von: DK7FC An: rsgb_lf_group Verschickt: Mi, 4 Jan 2017 11:21 am Betreff: Re: LF: VLF with two small loops. Hi Edgar, Thanks, interesting pictures. What AL value do these ferrite cores have? I= s it an FT80-77? Maybe the AL is to low, so you may get better results when= using 3 of them in parallel, with the same number of turns, if you plan to= use the loop on lower frequencies... Is it intended as a portable equipment for experiments in quite locations?= :-) 73, Stefan Am 04.01.2017 02:43, schrieb edgar:=20 Hi Stefan, Try this one. https://www.dropbox.com/s/9x26r4x4ifx3rzr/4%20m%20loops.zip?dl=3D0 Dropbox have "improved their service" by making the public folder private = from March this year. I am trying to learn how to share files and found that the link changed wh= en the zip file was updated with the SL .usr file and the frequency file. Regards, Edgar Moonah, Tasmania. ------=_Part_133526_47396850.1483527822492 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Editing the url slightly (www -> dl, remove the = ? appendix) bypasses the cumbersome pre-download page:
https://dl.d= ropbox.com/s/9x26r4x4ifx3rzr/4%20m%20loops.zip

Another option w= ould be more turns on the primary and secondary (e.g. 3 and = 36). The idea is that the primary inductance of the transformer should be (= much) greater than that of the single-turn loop.

Best regards,
Ma= rkus (DF6NM)


-----Urspr=C3=BCngliche Mitteilung-----
Von: DK= 7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@b= lacksheep.org>
Verschickt: Mi, 4 Jan 2017 11:21 am
Betreff: Re: LF= : VLF with two small loops.

Hi Edgar,

Thanks, interesting pictures. What AL value do these ferrite cores have? Is it an FT80-77? Maybe the AL is to low, so you may get better results when using 3 of them in parallel, with the same number of turns, if you plan to use the loop on lower frequencies...
Is it intended as a portable equipment for experiments in quite locations? :-)

73, Stefan

Am 04.01.2017 02:43, schrieb edgar:
=20 Hi Stefan,

Try this one.

https://www.dropbox.com/s/9x26r4x4ifx3rzr/4= %20m%20loops.zip?dl=3D0

Dropbox have "improved their service" by making the public folder private from March this year.

I am trying to learn how to share files and found that the link changed when the zip file was updated with the SL .usr file and the frequency file.

Regards, Edgar
Moonah, Tasmania.
------=_Part_133526_47396850.1483527822492--