Return-Path: Received: from mtain-dh06.r1000.mx.aol.com (mtain-dh06.r1000.mx.aol.com [172.29.65.26]) by air-md02.mail.aol.com (v129.4) with ESMTP id MAILINMD023-8b7a4cb323cc147; Mon, 11 Oct 2010 10:48:44 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dh06.r1000.mx.aol.com (Internet Inbound) with ESMTP id C83AD38001AA8; Mon, 11 Oct 2010 10:47:29 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1P5Jct-0004h3-1x for rs_out_1@blacksheep.org; Mon, 11 Oct 2010 15:45:19 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1P5Jcs-0004gu-6n for rsgb_lf_group@blacksheep.org; Mon, 11 Oct 2010 15:45:18 +0100 Received: from nm28-vm0.bullet.mail.sp2.yahoo.com ([98.139.91.234]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1P5Jcp-0006zV-QT for rsgb_lf_group@blacksheep.org; Mon, 11 Oct 2010 15:45:18 +0100 Received: from [98.139.91.67] by nm28.bullet.mail.sp2.yahoo.com with NNFMP; 11 Oct 2010 14:45:07 -0000 Received: from [98.139.91.41] by tm7.bullet.mail.sp2.yahoo.com with NNFMP; 11 Oct 2010 14:45:07 -0000 Received: from [127.0.0.1] by omp1041.mail.sp2.yahoo.com with NNFMP; 11 Oct 2010 14:45:07 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 27920.96255.bm@omp1041.mail.sp2.yahoo.com Received: (qmail 11124 invoked by uid 60001); 11 Oct 2010 14:45:06 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1286808306; bh=/HeT8NCI0ttrTEbBnwOv58YELQyWjtavzboJ0LdcR94=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=M0GkQS8PicpQypvOQzUyiD+EayDXPGRVbve3tWN8zMQFnZk7exd/0HmG5anlw4FwT8UyTP/vF65asvE2jB7iSl36ZXmU/LlhvDItbAr+f9iW1Z6izfb4wyNyeKLoy/MuzhoZB/iGxatLogd/eFJ51V6bf0OxLclMZMSS6GruO9s= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=tYNIKdDeVI0TgUXSOqrFo638M3qY04QaJ1fod+cHPQs4QO09slrcHSPMkHBzc8UoVPQ1keHzo4XIk9f7+huCRl/zdyIGaY5nVr+XLKtF4M0fAWni1uRetpZE0v/tEQh6D32ROs30OV6BnIesz6s97xVSg63q65l5FB8ANXFGPuU=; Message-ID: <96514.1936.qm@web111905.mail.gq1.yahoo.com> X-YMail-OSG: molZvjYVM1ka5s3G_mVEpxPKInNh6AlDNc.Pu0L3X_9oOst X81eehVPOfXmXdG5p5ugm.SrjNWc.pBO._2m3PUgEryLz6Fd1BgqoAU4IblC X7MTCqaPFxmY9n12d.McmnO5DDzs3r7zArjj.5fAsBIaga4Kn0Vo.qfWLWRK lcx0M.1ODoQxt62kDYCKlASXs2FM9VuxjUj2ZtIHzXJmQr0vjCOy5iQoDv48 CSHhEyFxtXuVv7kBD5bWtq0tgqTjlch9pQEd8g6eMwTh1z_t58wradmslBGw Rm0wBw.f.mon3Sx6rADQ- Received: from [151.99.187.181] by web111905.mail.gq1.yahoo.com via HTTP; Mon, 11 Oct 2010 07:45:05 PDT X-Mailer: YahooMailRC/504.5 YahooMailWebService/0.8.106.282862 References: <368528.21055.qm@web28103.mail.ukl.yahoo.com> Date: Mon, 11 Oct 2010 07:45:05 -0700 (PDT) From: Daniele Tincani To: rsgb_lf_group@blacksheep.org In-Reply-To: <368528.21055.qm@web28103.mail.ukl.yahoo.com> MIME-Version: 1.0 DomainKey-Status: good (testing) X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,HTML_TAG_EXIST_TBODY=0.126 Subject: Re: VLF: Transmit hardware Content-Type: multipart/alternative; boundary="0-973813319-1286808305=:1936" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.4 required=5.0 tests=FORGED_YAHOO_RCVD,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-m210.2 ; domain : yahoo.com DKIM : pass x-aol-sid: 3039ac1d411a4cb323812995 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --0-973813319-1286808305=:1936 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hi, glad that my rather imprecise reply helped you a bit. More details can be found here=20 http://tech.dir.groups.yahoo.com/group/VLF_Group/message/14860=A0and a lot= of info=20 are available at this beatiful site (in my opinion):=20 http://www.astrosol.ch/index.html. Best regards Daniele ________________________________ From: M0FMT To: rsgb_lf_group@blacksheep.org Sent: Mon, October 11, 2010 3:11:07 PM Subject: Re: VLF: Transmit hardware Thanks Daniele I guessed some one would know. Yes thats the one it is=A0a very strong sig= nal. It=20 keys the CW on one of the TTY tones the HF one from memory=A0while running= the=20 other one (LF) at full amplitude. Thanks again for the=A0info.=A0 73 es GL petefmt I support www.NotSpotTelecom.Com your community Telco / ISP. --- On Mon, 11/10/10, Daniele Tincani wrote: >From: Daniele Tincani >Subject: Re: VLF: Transmit hardware >To: rsgb_lf_group@blacksheep.org >Date: Monday, 11 October, 2010, 6:11 > > >Station on 18KHz could be Russian RDL (18.1KHz) which at times transmit= CW=20 >messages like this one: "RDL RDL 85690 92256 85690 92256 85690 92256 K". >Regards >Daniele > > > > ________________________________ From: M0FMT >To: rsgb_lf_group@blacksheep.org >Sent: Mon, October 11, 2010 12:44:40 AM >Subject: Re: VLF: Transmit hardware > > >Hi Markus > >Great development work always the unexpected in the best planning. > >In UK 405 line TV was notorious for the 10kc/s whistle from the LOPTI (40= 5x25=20 >[interlaced] frame TB =3D 10125Hz) and even the modern 625 lineTV=A0is /= was=20 >noticable at around 15kc/s (kHz) by the younger generation with good ears= ...=20 >;-)=A0=A0=A0 > >So, yes I can understand the issue now you bring it up. > >BTW I have been looking with Sound card RX and LW but seem to be getting= odd=20 >effects new to me BC AM break thro -=A0also not seeing any Alpha stations= ? The big=20 >Mil stations are visible with a station on 18kc/s transmitting 12wpm CW= at times=20 >then TTY and other phase shift transmissions..... the CW always ends with= a K as=20 >though inviting a reply. > >Thanks for your efforts Markus. > >73 es GL petefmt > >I support www.NotSpotTelecom.Com your community Telco / ISP. > >--- On Sun, 10/10/10, Markus Vester wrote: > > >>From: Markus Vester >>Subject: Re: VLF: Transmit hardware >>To: rsgb_lf_group@blacksheep.org >>Date: Sunday, 10 October, 2010, 11:20 >> >> >>I got a complaint from the neighbourhood about acoustic radiation from= the coil!=20 >>So I=A0interrupted the carrier for a few minutes around 12:35 and improv= ised a=20 >>foam package for noise mitigation. >>=A0 >>BTW It is quite remarkable that=A0an air coil vibrates at=A09 kHz and no= t 18 kHz, as=20 >>Lorentz forces between windings should be a purely quadratic effect. I= presume=20 >>that the vibration is induced by the earth field - at only 50 uT it's am= azing=20 >>how strong the effect still is! The loudest part of the setup is the fer= rite=20 >>transformer, probably due to magnetostriction, with bias from=A0some rem= anent core=20 >>magnetisation. >>=A0 >>Best wishes for a quiet Sunday, >>=A0 >>MArkus (DF6NM) >>=A0 >>=A0 >>----- Original Message -----=20 >>>From: M0FMT=20 >>>To: rsgb_lf_group@blacksheep.org=20 >>>Sent: Sunday, October 10, 2010 12:02 AM >>>Subject: Re: VLF: Transmit hardware >>> >>> >>>... >>>XYL has warned no coils on the roof here!............. hee.=20 >>>=20 > >=20 =20 --0-973813319-1286808305=:1936 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Hi,
glad that my rather imprecise reply helped you a bit.
More details can be found here http://tech.dir.groups.yahoo.com/grou= p/VLF_Group/message/14860 and a lot of info are available at this= beatiful site (in my opinion): http://www.astrosol.ch/index.html.
Best regards
Daniele
=
From: M0FMT <m0fmt@yaho= o.co.uk>
To: rsgb_lf= _group@blacksheep.org
Sent:= Mon, October 11, 2010 3:11:07 PM
Subject: Re: VLF: Transmit hardware

<= /TABLE>
<= br> --0-973813319-1286808305=:1936--
Thanks Daniele
 
I guessed some one would know. Yes thats the one it is a very st= rong signal. It keys the CW on one of the TTY tones the HF one from memory=  while running the other one (LF) at full amplitude. Thanks again for= the info. 

73 es GL petefmt

I support www.NotSpotTelecom.Com= your community Telco / ISP.

--- On Mon, 11/10/10, Daniele Tinca= ni <danieletincani@yahoo.com> wrote:

From: Daniele Tincani <danieletincani@yahoo.= com>
Subject: Re: VLF: Transmit hardware
To: rsgb_lf_group@blacks= heep.org
Date: Monday, 11 October, 2010, 6:11

Station on 18KHz could be Russian RDL (18.1KHz) which at times transm= it CW messages like this one: "RDL RDL 85690 92256 85690 92256 85690 92256= K".
Regards
Daniele
=
From: M0FMT <m0fmt@yaho= o.co.uk>
To: rsgb_lf= _group@blacksheep.org
Sent:= Mon, October 11, 2010 12:44:40 AM
Subject: Re: VLF: Transmit hardware

Hi Markus
 
Great development work always the unexpected in the best planning.
 
In UK 405 line TV was notorious for the 10kc/s whistle from the LOPTI= (405x25 [interlaced] frame TB =3D 10125Hz) and even the modern 625 lineTV=  is / was noticable at around 15kc/s (kHz) by the younger generation= with good ears... ;-)   
 
So, yes I can understand the issue now you bring it up.
 
BTW I have been looking with Sound card RX and LW but seem to be gett= ing odd effects new to me BC AM break thro - also not seeing any Alph= a stations? The big Mil stations are visible with a station on 18kc/s tran= smitting 12wpm CW at times then TTY and other phase shift transmissions...= .. the CW always ends with a K as though inviting a reply.
 
Thanks for your efforts Markus.

73 es GL petefmt

I supp= ort www.NotSpotTelecom.Com your community Telco / ISP.

--- On= Sun, 10/10/10, Markus Vester <markusvester@aol.com>= wrote:

From: Markus Vester <markusvester@aol.com>= ;
Subject: Re: VLF: Transmit hardware
To: rsgb_lf_group@blacksheep.o= rg
Date: Sunday, 10 October, 2010, 11:20

I got a complaint from the neighbourhood= about acoustic radiation from the coil! So I interrupted the carrier= for a few minutes around 12:35 and improvised a foam package for noise mi= tigation.
 
BTW It is quite remarkable that an= air coil vibrates at 9 kHz and not 18 kHz, as Lorentz forces between= windings should be a purely quadratic effect. I presume that the vibratio= n is induced by the earth field - at only 50 uT it's amazing how strong th= e effect still is! The loudest part of the setup is the ferrite transforme= r, probably due to magnetostriction, with bias from some remanent cor= e magnetisation.
 
Best wishes for a quiet Sunday,
 
MArkus (DF6NM)
 
 
----- Original Message -----
From: M0FMT
Sent: Sunday, October 10, 2010 12:0= 2 AM
Subject: Re: VLF: Transmit hardware=

...
XYL has warned no coils on the roof here!............. hee.