Return-Path: Received: from mtain-mp02.r1000.mx.aol.com (mtain-mp02.r1000.mx.aol.com [172.29.193.70]) by air-de08.mail.aol.com (v129.10) with ESMTP id MAILINDE084-5ec14de677152ce; Wed, 01 Jun 2011 13:29:57 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 64F46380000CF; Wed, 1 Jun 2011 13:29:50 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QRpD1-0006yT-0A for rs_out_1@blacksheep.org; Wed, 01 Jun 2011 18:27:55 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QRpD0-0006yK-7c for rsgb_lf_group@blacksheep.org; Wed, 01 Jun 2011 18:27:54 +0100 Received: from nm7.bullet.mail.ukl.yahoo.com ([217.146.182.248]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1QRpD0-0007fh-5C for rsgb_lf_group@blacksheep.org; Wed, 01 Jun 2011 18:27:54 +0100 Received: from [217.146.183.215] by nm7.bullet.mail.ukl.yahoo.com with NNFMP; 01 Jun 2011 17:27:47 -0000 Received: from [217.146.183.165] by tm8.bullet.mail.ukl.yahoo.com with NNFMP; 01 Jun 2011 17:27:47 -0000 Received: from [127.0.0.1] by omp1006.mail.ukl.yahoo.com with NNFMP; 01 Jun 2011 17:27:47 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 448745.94665.bm@omp1006.mail.ukl.yahoo.com Received: (qmail 76457 invoked by uid 60001); 1 Jun 2011 17:27:47 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1306949267; bh=x6QjU5ZFuNlKWVQunza+OH/AyF+u4lK+Usj+GPhPhqo=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=oQQ6dWNusTMEU1x26fiP5sVjTNkBR+79s8bdGovyMGWdvvScnvmGmrhpeZjPWHVyk5qAO7KMr6bSSlEHtJvKJ67h/RC0j6ozPxTJtg3oB9TsFJuuDPcqN9VKFe0VuavFhgotFwgCMqD1UUCvoYvInYbadWha1xb3jocXG6DrzZc= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.co.uk; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=nXDlb30Zl7yYgT4/qRpyYofGx/H5TmR8iI6cqNlD0JoJZ7OUuxa1O+wGd0UhBsMWgJnvFEd0w/MTfK9LHDpj1omkcux9W+kjecJWfLHgOZOtDDMFJqmNXZ9hNxSEYgzMnT0rochURAQPSqabx979Sx5QYYzCRqcrsb0O4EIGT80=; Message-ID: <231656.76217.qm@web28512.mail.ukl.yahoo.com> X-YMail-OSG: ZTjAblAVM1mFEjV4KS5iiPAr7eOOyW.jEiBcRpEIi1__jvv 0D9ceCX1Oi4DwLqI8kWgUQVAv.GJvMKNbIy07V2BBZzozPJzh2Q0.gHzphIx Yy1S3JT.kBE3GdWM5UPtvPg1w_NioFsjXxX4qny9_44Gsm67YSKcUMxtN_GC zi7cSy5pPBJ7IuwwnjW2z6x_HSKyvwIMO_XmCebfIq3geCBso_f2942uj96p LlXpKYAdJaGFTJ7kduQxFj3urGci36g3giqfWrtaddVFVsNFUKadJOC8fXs2 PAtPHVhfxYFhvGDiE_kjNwTwof8dm0baMlQPreUlZHMwvhXSeczhZLhx7NSv k2NLTeHjp91TCTkI41T34xygvhT0.o5CZqugbOnEs7AThkPytLPJ8EZl7c5S 33PTudO1guV5Noyw7Tck9D4ywCuHSzg2R32kDImplJA5YgQwIkfInLTBG Received: from [81.97.191.183] by web28512.mail.ukl.yahoo.com via HTTP; Wed, 01 Jun 2011 18:27:46 BST X-Mailer: YahooMailClassic/14.0.1 YahooMailWebService/0.8.111.303096 Date: Wed, 1 Jun 2011 18:27:46 +0100 (BST) From: Chris Osborn To: rsgb_lf_group@blacksheep.org In-Reply-To: <8CDEE5C0B315640-6BC-35CF0@angweb-usd022.sysops.aol.com> MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: Re: LF: VLF - G3XIZ QRT - Buckets! Content-Type: multipart/alternative; boundary="0-31178397-1306949266=:76217" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_30_40,HTML_FONTCOLOR_BLUE, HTML_FONTCOLOR_UNKNOWN,HTML_MESSAGE,HTML_TAG_EXISTS_TBODY, MAILTO_TO_SPAM_ADDR 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-AUTHENTICATION: mail_rly_antispam_dkim-d004.2 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1dc1464de6770d39f3 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0-31178397-1306949266=:76217 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Thanks Marcus, That looks good. I've put some lacquer on the offending part of the loading coil which is= now drying but I don't feel confident about pushing too much power throug= h it. I may give the buckets a try . .=20 73 Chris G3XIZ --- On Wed, 1/6/11, Markus Vester wrote: From: Markus Vester Subject: Re: LF: VLF - G3XIZ QRT - Buckets! To: rsgb_lf_group@blacksheep.org Date: Wednesday, 1 June, 2011, 11:16 Hi Chris, it's here: http://df6nm.bplaced.net/VLF/VLF_110304-06/coil_legospacers.jpg Best 73, Markus -----Urspr=FCngliche Mitteilung-----=20 Von: Dave G3WCB. An: rsgb_lf_group@blacksheep.org Verschickt: Di., 31. Mai. 2011, 21:59 Thema: LF: VLF - G3XIZ QRT - Buckets! Chris, =A0 Marcus uses stacked buckets - see e-mail below. He did post a photo of his= coil, but I can't find it at the moment. =A0 73, Dave G3WCB=20 =A0 Dear Henny, the coil consists of seven ordinary ten-liter polypropylene household=20 buckets, inserted upside-down into one another. The diameter of the bucket= s=20 is about 25 cm at the bottom and 21 cm near the top. Each bucket carries= 460=20 turns of 0.4 mm enameled wire. The lead from the top end of one winding to= =20 th bottom end of the next has to run alomg the winding, and is insulated= =20 with several strips of tape an foam material. Total DC resistance is about= =20 320 ohms. The resonance is adjusted by the amount of overlap. Inserting the buckets= =20 deeper into one another lowers the frequency by enhancing the mutual=20 inductive coupling, along with a slightly higher inter-layer capacitance.= My=20 240 pF antenna requires a total length of about 60 cm for 9 kHz. For the= 500=20 pF kite antenna I need only five buckets, and with larger spacing. Best 73, Markus (DF6NM) -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@black= sheep.org]On Behalf Of Chris Osborn Sent: 31 May 2011 15:39 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: VLF - G3XIZ QRT - MF QRV Thank you Stefan, =A0 I hope that you had a pleasant weekend and thank you for looking for the= signal. =A0 I have made some aerial improvements although not as much as I had anticip= ated. I now have an inverted 'L' =A048m long and with a mean height 11m I have=A0far better insulators too. I shall do some more improvements later. =A0 My loading coil became unserviceable yesterday at 06.10Z whilst transmitti= ng. I think that a flying insect=A0hit the wires and exploded, causing a short= -circuit. I have had this problem before=A0with insects=A0with high voltages. =A0 I shall try to rectify the=A0coil and then see if my aerial shows an impro= vement in signal strength. Eddie G3ZJO picks me up regularly=A0and his VLF grabber is most useful. =A0 Has anyone an easier way of=A0making a 1.3 H=A0loading coil ? My present dual-overlaid winding=A0coil took many hours to make and seems= quite unreliable. =A0 73 Chris G3XIZ --0-31178397-1306949266=:76217 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Thanks Marcus,

That looks good.
I= 've put some lacquer on the offending part of the loading coil which is no= w drying but I don't feel confident about pushing too much power through= it.

I may give the buckets a try . .

73 Chris G3XIZ
--- On Wed, 1/6/11, Markus Vester <markusvester@aol.com><= /b> wrote:

From: Markus Vester <markus= vester@aol.com>
Subject: Re: LF: VLF - G3XIZ QRT - Buckets!
To:= rsgb_lf_group@blacksheep.org
Date: Wednesday, 1 June, 2011, 11:16
<= br>
Hi Chris, it's here:

Best 73, Markus


Chris,
 
Marcus uses stacked buckets - see e-mail below= . He did post a photo of his coil, but I can't find it at the moment.
 
73, Dave G3WCB
 
Dear Henny,
the coil consists of seven ordinary ten-liter polypropylene household=
buckets, inserted upside-down into one another. The diameter of the= buckets
is about 25 cm at the bottom and 21 cm near the top. Each bucket carr= ies 460
turns of 0.4 mm enameled wire. The lead from the top end of one windi= ng to
th bottom end of the next has to run alomg the winding, and is insula= ted
with several strips of tape an foam material. Total DC resistance is= about
320 ohms.
The resonance is adjusted by the amount of overlap. Inserting the buc= kets
deeper into one another lowers the frequency by enhancing the mutual=
inductive coupling, along with a slightly higher inter-layer capacita= nce. My
240 pF antenna requires a total length of about 60 cm for 9 kHz. For= the 500
pF kite antenna I need only five buckets, and with larger spacing.
Best 73,
Markus (DF6NM)
= -----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailt= o:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Chris Osborn<= br> Sent: 31 May 2011 15:39
To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: VLF - G3XIZ QRT - MF QRV

Thank you Stefan,
 
I hope that you had a pleasant weekend and thank you for looking for= the signal.
 
I have made some aerial improvements although not as much as I had an= ticipated.
I now have an inverted 'L'  48m long and with a mean height 11m<= /div>
I have far better insulators too.
I shall do some more improvements later.
 
My loading coil became unserviceable yesterday at 06.10Z whilst trans= mitting.
I think that a flying insect hit the wires and exploded, causing= a short-circuit.
I have had this problem before with insects with high volta= ges.
 
I shall try to rectify the coil and then see if my aerial shows= an improvement in signal strength.
Eddie G3ZJO picks me up regularly and his VLF grabber is most us= eful.
 
Has anyone an easier way of making a 1.3 H loading coil ?
My present dual-overlaid winding coil took many hours to make an= d seems quite unreliable.
 
73 Chris G3XIZ
--0-31178397-1306949266=:76217--