Return-Path: Received: from mtain-dl06.r1000.mx.aol.com (mtain-dl06.r1000.mx.aol.com [172.29.74.212]) by air-ma05.mail.aol.com (v129.10) with ESMTP id MAILINMA054-b5274de53eb93d2; Tue, 31 May 2011 15:17:14 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dl06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4FA7838000106; Tue, 31 May 2011 15:17:10 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QRUPs-0002IZ-AO for rs_out_1@blacksheep.org; Tue, 31 May 2011 20:15:48 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QRUPr-0002IQ-4g for rsgb_lf_group@blacksheep.org; Tue, 31 May 2011 20:15:47 +0100 Received: from nm3-vm0.bullet.mail.ukl.yahoo.com ([217.146.183.228]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1QRUPr-0001fq-1M for rsgb_lf_group@blacksheep.org; Tue, 31 May 2011 20:15:47 +0100 Received: from [217.146.183.210] by nm3.bullet.mail.ukl.yahoo.com with NNFMP; 31 May 2011 19:15:36 -0000 Received: from [217.146.183.163] by tm3.bullet.mail.ukl.yahoo.com with NNFMP; 31 May 2011 19:15:34 -0000 Received: from [127.0.0.1] by omp1004.mail.ukl.yahoo.com with NNFMP; 31 May 2011 19:15:34 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 182045.9453.bm@omp1004.mail.ukl.yahoo.com Received: (qmail 46217 invoked by uid 60001); 31 May 2011 19:15:34 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.co.uk; s=s1024; t=1306869333; bh=NshgjAaQaWi92O4rAF0Ug02hgNdIspkpDmSLm1pb69c=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type; b=Gbofl6aJ6dvsvjV0pBaoTlgHXjDfs5nQTiwUaDUSJcs+N6WGMoDozLn3oUyuBjwBIm+qoEaKjK3250EudgXNo6PgAwTNJWZ2CHROA5QycFSeHYhFAjNmIt0MBwKGQA5EPN2as1BBV/sk4iwZ0JGsyUpEXhWpKI9hjeyTeyOINb8= 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:MIME-Version:Content-Type; b=J0dKGWZYEzsQyIkdGYPYM3WjNEC3Odm9RD+GhC0xzZWPv4RxhwTk7xC2XM9jkoxo1OAicGq5wap3f2Q+I3c9TzXOcXTp1pkWtR5vza00SZrKNoA2Vx2wxgXzsEN974Eaxb6XGOUmgk9xdVACHzBEpqchB5hSYIeTopQpmZluohU=; Message-ID: <901711.45550.qm@web28509.mail.ukl.yahoo.com> X-YMail-OSG: XE3.P1gVM1mwTfnNv3dsO_oS1T845_N4PbfzgbT8Z1kfFya XbKJFkAIhgAvVgw4aozXyswverHkt7VNoXDKu_Nidi4i2mUpZQk0VzmwyVHq iN2fVsgllmKaWnmNqUMpFs141hNTpnwraNdWwHbKWDVoRjEQJhhBlUprs9Nd G40G5e4YOPznxd3HWULKdhoYuUH4V3RRw90mjQr2JcMTV_4Pz1Q1C1DTmNdT l.HLpaVLlb8pc6X.Dv23UqLF7kn7_zBFwpMI09joW5tRS1TddXwr7BMh.loM aYp2qCttVOvvLhTdtOpGR9CRPk3h.Uf7v.AoxThRYYWJXnf1434Mo7TMzlUQ yXRM- Received: from [81.97.191.183] by web28509.mail.ukl.yahoo.com via HTTP; Tue, 31 May 2011 20:15:33 BST X-Mailer: YahooMailClassic/14.0.1 YahooMailWebService/0.8.111.303096 Date: Tue, 31 May 2011 20:15:33 +0100 (BST) From: Chris Osborn To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 DomainKey-Status: good (testing) Subject: Re: LF: VLF - G3XIZ QRT - MF QRV Content-Type: multipart/alternative; boundary="0-1555207495-1306869333=:45550" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, HTML_TAG_EXISTS_TBODY 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-d271.2 ; domain : yahoo.co.uk DKIM : pass x-aol-sid: 3039ac1d4ad44de53eb6103b X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0-1555207495-1306869333=:45550 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Mal, LF, My loading coil is made using 0.35mm enamel covered copper wire. Experience has shown that this is too fine for general handling and breaks= down too easily. Unfortunately the loading coil is as large as I can make it as a single un= it so the inductance required governed the gauge of the wire. I had to make the coil in my garage and then transport it through a narrow gate. Even so it's quite a large unit. The lesson is that a much longer aerial requires a smaller loading coil an= d then these problems would not occur.=20 Unfortunately I cannot greatly improve my existing aerial system. Consequently I'm considering making a more robust and transportable design= of loading coil which is why I asked for suggestions. 73 Chris G3XIZ --- On Tue, 31/5/11, mal hamilton wrote: From: mal hamilton Subject: Re: LF: VLF - G3XIZ QRT - MF QRV To: rsgb_lf_group@blacksheep.org Date: Tuesday, 31 May, 2011, 16:04 =20 =20 Chris Why is the wire insulation breaking down, is the wire too=20 thin. Think of the amps an=A0 alternator handles with pile wound copper=20 enamel insulated wire. Think of the problems you would have with a QRO rig if you=20 are suffering breakdown with QRP De mal/g3kev =A0 ----- Original Message -----=20 From:=20 Chris Osborn=20 =20 To: rsgb_lf_group@blacksheep.org=20 =20 Sent: Tuesday, May 31, 2011 3:38 PM Subject: Re: LF: VLF - G3XIZ QRT - MF=20 QRV =20 =20 =20 =20 =20 Thank you Stefan, =A0 I hope that you had a pleasant weekend and thank you for looking= =20 for the signal. =A0 I have made some aerial improvements although not as much as I had= =20 anticipated. I now have an inverted 'L' =A048m long and with a mean height=20 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=20 transmitting. I think that a flying insect=A0hit the wires and exploded,=20 causing a short-circuit. I have had this problem before=A0with insects=A0with high=20 voltages. =A0 I shall try to rectify the=A0coil and then see if my aerial=20 shows an improvement in signal strength. Eddie G3ZJO picks me up regularly=A0and his VLF grabber is most=20 useful. =A0 Has anyone an easier way of=A0making a 1.3 H=A0loading coil=20 ? My present dual-overlaid winding=A0coil took many hours to make=20 and seems quite unreliable. =A0 73 Chris G3XIZ --- On Tue, 31/5/11, Stefan Sch=E4fer=20 =20 wrote: =20 From:=20 Stefan Sch=E4fer=20 Subject: Re: LF: VLF=20 - G3XIZ QRT - MF QRV To: rsgb_lf_group@blacksheep.org Date:=20 Tuesday, 31 May, 2011, 14:34 Hi Chris, VLF, I have been 1600 km far=20 away over the weekend but my grabber(s) was monitoring. Nothing= seen=20 here, unfortunately. Good luck with your improvements! I'll join=20 in too, soon. 73, Stefan/DK7FC Am 28.05.2011 11:41,=20 schrieb wolf_dl4yhf:=20 Hi Chris, Nothing seen here so far,=20 but no big surprise considering the QRN. Any copy of your=20 signal by stations in DL or PA ? 73, =A0=A0 Wolf=20 DL4YHF / DF0WD . Am 28.05.2011 11:31, schrieb Chris Osborn:=20 =20 =20 =20 =20 LF, I'll be going QRT on VLF soon. I'll=20 then put out a few calls on 500 kHz CW and see if ther= e's=20 any life left on MF. Anyone who wants a sked or a=20 signal transmitted on MF or LF just give me a little= notice=20 and I'll try to oblige. I'll be QRV on VLF again from=20 05.00Z tomorrow for several hours. 73 Chris=20 G3XIZ --0-1555207495-1306869333=:45550 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Mal, LF,

My loading coil is made using 0.35mm en= amel covered copper wire.
Experience has shown that this is too fine for general handling and breaks down too easily.

= Unfortunately the loading coil is as large as I can make it as a single un= it so the inductance required governed the gauge of the wire.
I had to= make the coil in my garage and then transport it through a narrow gate.
Even so it's quite a large unit.

The lesson is tha= t a much longer aerial requires a smaller loading coil and then these prob= lems would not occur.
Unfortunately I cannot greatly improve my existi= ng aerial system.
Consequently I'm considering making a more robust and= transportable design of loading coil which is why I asked for suggestions= .

73 Chris G3XIZ

--- On Tue, 31/5/11, mal hamilton <= ;g3kevmal@talktalk.net> wrote:
From: mal hamilton <g3kevmal@talktalk.net>
Subject: Re: LF: VLF - G3XIZ QRT - MF QR= V
To: rsgb_lf_group@blacksheep.org
Date: Tuesday, 31 May, 2011, 16:0= 4

=20 =20
Chris
Why is the wire insulation breaking down, is the= wire too=20 thin. Think of the amps an  alternator handles with pile wound copper= =20 enamel insulated wire.
Think of the problems you would have with a QRO= rig if you=20 are suffering breakdown with QRP
De mal/g3kev
 
----- Original Message -----
From:= =20 Chris Osborn=20
Sent: Tuesday, May 31, 2011 3:3= 8 PM
Subject: Re: LF: VLF - G3XIZ QR= T - MF=20 QRV

Thank you Stefan,
 
I hope that you had a pleasant weekend and thank you for look= ing=20 for the signal.
 
I have made some aerial improvements although not as much as= I had=20 anticipated.
I now have an inverted 'L'  48m long and with a mean hei= ght=20 11m
I have far better insulators too.
I shall do some more improvements later.
 
My loading coil became unserviceable yesterday at 06.10Z whil= st=20 transmitting.
I think that a flying insect hit the wires and exploded,= =20 causing a short-circuit.
I have had this problem before with insects with hi= gh=20 voltages.
 
I shall try to rectify the coil and then see if my aeria= l=20 shows an improvement in signal strength.
Eddie G3ZJO picks me up regularly and his VLF grabber is= most=20 useful.
 
Has anyone an easier way of making a 1.3 H loading= coil=20 ?
My present dual-overlaid winding coil took many hours to= make=20 and seems quite unreliable.
 
73 Chris G3XIZ

--- On Tue, 31/5/11, Stefan Sch=E4fe= r=20 <Stefan.Schaefer@iup.uni-heidelberg.de>=20 wrote:

From:=20 Stefan Sch=E4fer=20 <Stefan.Schaefer@iup.uni-heidelberg.de>
Subject: Re: LF= : VLF=20 - G3XIZ QRT - MF QRV
To: rsgb_lf_group@blacksheep.org
Date= :=20 Tuesday, 31 May, 2011, 14:34

Hi Chris, VLF,

I have been 1600= km far=20 away over the weekend but my grabber(s) was monitoring. Nothing= seen=20 here, unfortunately.
Good luck with your improvements!
I'l= l join=20 in too, soon.

73, Stefan/DK7FC


Am 28.05.2011= 11:41,=20 schrieb wolf_dl4yhf:=20
Hi Chris,

Nothing seen here so= far,=20 but no big surprise considering the QRN.

Any copy of yo= ur=20 signal by stations in DL or PA ?

73,
   Wo= lf=20 DL4YHF / DF0WD .

Am 28.05.2011 11:31, schrieb Chris Osb= orn:=20
LF,

I'll be going QRT= on VLF soon.
I'll=20 then put out a few calls on 500 kHz CW and see if ther= e's=20 any life left on MF.

Anyone who wants a sked or= a=20 signal transmitted on MF or LF just give me a little= notice=20 and I'll try to oblige.

I'll be QRV on VLF agai= n from=20 05.00Z tomorrow for several hours.

73
Chris= =20 G3XIZ

--0-1555207495-1306869333=:45550--