Return-Path: Received: from mtain-mi12.r1000.mx.aol.com (mtain-mi12.r1000.mail.aol.com [172.21.131.170]) by air-mc01.mail.aol.com (v129.4) with ESMTP id MAILINMC014-a8ce4c00315b114; Fri, 28 May 2010 17:10:51 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mi12.r1000.mx.aol.com (Internet Inbound) with ESMTP id 30EB23800006E; Fri, 28 May 2010 17:10:50 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1OI6oZ-0002tG-ML for rs_out_1@blacksheep.org; Fri, 28 May 2010 22:09:59 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1OI6oZ-0002t5-4D for rsgb_lf_group@blacksheep.org; Fri, 28 May 2010 22:09:59 +0100 Received: from mail-ww0-f43.google.com ([74.125.82.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1OI6oX-00023X-L2 for rsgb_lf_group@blacksheep.org; Fri, 28 May 2010 22:09:59 +0100 Received: by wwe15 with SMTP id 15so119372wwe.16 for ; Fri, 28 May 2010 14:09:51 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=pMYCqURKMZ995T6IaazWOwMFxslYQLiY3f9Ef6OHXmI=; b=L8okaWgJU/YQvNKGkYo74p6e41RolZHsQbvgQsIXJhLU92+iRvbVQVZhT/pqWc6fcB +XMBsUnR/hOsCOx6Z8jGKY2hFMsf9TD6SI4z+WYPAirJ3Pt8n0iBoRr/FGmlU1i412jZ dgraDtD/iQ2NOIFmtUvroPBaGj4sXasobMMHo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=KZd4oLRfxFWjWw7uvOiAcGTdtbuO4FufAZtd6zE5Wo63SgXY6YOiUnP1qZGwcLqoLk WN512yBQa3HjAY0zbZ86s/G77RgDIzGGcNc/LMnEG44xAkeEUmTeIhgQwLklKdGEu7AM DZ3n3T3AUH8YZgFOGOUoeopcaZpxTVfrlA3f8= MIME-Version: 1.0 Received: by 10.227.129.134 with SMTP id o6mr793352wbs.111.1275080991239; Fri, 28 May 2010 14:09:51 -0700 (PDT) Received: by 10.216.38.67 with HTTP; Fri, 28 May 2010 14:09:50 -0700 (PDT) In-Reply-To: References: <38A51B74B884D74083D7950AD0DD85E82A1C00@File-Server-HST.hst.e-technik.tu-darmstadt.de> <1344257766.4243506.1275063067203.JavaMail.fmail@mwmweb035> Date: Fri, 28 May 2010 22:09:50 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: 8.97kHz - Near field test by ear: The "human factor" Content-Type: multipart/alternative; boundary=0016367faf558af2080487aded7f X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE 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-m236.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039400cded44c00315a0b0d X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --0016367faf558af2080487aded7f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sorry, last email got sent before finishing it. It should end with "and it can be done for very little". 73s Roger G3XBM On 28 May 2010 22:07, Roger Lapthorn wrote: > John (GM4SLV) et al, > > Well, unlike 500kHz WSPR, I doubt you'll ever be copying my signals > sub-9kHz signals, although you may well copy Stefan and others from Germ= any > next autumn/winter and Mal G3KEV if he can be persuaded to give it a rea= l go > with his large antennas and potential for high power; I hope he does. > > Here I'm very much enjoying my simple QRP experiments sub-9kHz. I've a= set > of goals: 0.5km (achieved this week), 1km (hopefully within the next 2-3 > weeks with QRSS), then 3km to G6ALB (in the next village). If I achieve > these goals I shall be very pleased and will no doubt have learned a few > things in the process. > > I see adverts for HF rigs, beams and linears costing *thousands* of poun= ds > and reflect that my *entire* VLF system cost about =A315, maybe =A330 if= I > build a bigger PA. Playing with VLF suits me just fine and it an be don > > 73s > Roger G3XBM > > > On 28 May 2010 21:13, Andy Talbot wrote: > >> Only to those of a, errr, well, somewhat younger age. >> 800Hz to decent speakers, and its a different matter.... >> >> Mind you, listening to a teenagers car just gone past, a few tens-Hz of >> bass-boom goes a long way. He won't be hearing 8kHz in a few years tim= e. >> >> Andy >> www.g4jnt.com >> >> >> On 28 May 2010 20:50, John P-G wrote: >> >>> >>> >>> On Fri, 28 May 2010, Horst St=F6cker wrote: >>> >>> > Hello dreamers >>> > >>> > Unbelievable: 400m at by ear reception with only 4 Watt >>> >>> >>> >>> >>> I'm amazed at the work put in by the dreamers on this band, but just >>> think >>> - 4W of 9kHz fed to a decent speaker system - would be audible by the >>> human ear at 400m, just as accoustic waves... surely?? >>> >>> >>> >>> >>> Keep it up guys, this really /is/ LF if anything ever is. Makes 500kHz >>> seem light light-waves >>> >>> J >>> >>> GM4SLV >> >> >> > > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > G3XBM GQRP 1678 ISWL G11088 > --=20 http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm G3XBM GQRP 1678 ISWL G11088 --0016367faf558af2080487aded7f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sorry, last email got sent before finishing it.=A0=A0=A0 It should end wit= h "and it can be done for very little".

73s
Roger G3XB= M


On 28 May 2010 22:07, Roger Laptho= rn <rogerl= apthorn@gmail.com> wrote:
John (GM4SLV)= et al,

Well, unlike 500kHz WSPR, I doubt you'll ever be copyin= g my signals sub-9kHz signals, although you may well copy Stefan and other= s from Germany next autumn/winter and Mal G3KEV if he can be persuaded to= give it a real go with his large antennas and potential for high power;= I hope he does.

Here I'm very much enjoying my simple QRP experiments sub-9kHz. I&= #39;ve a set of goals: 0.5km (achieved this week), 1km (hopefully within= the next 2-3 weeks with QRSS), then 3km to G6ALB (in the next village).= If I achieve these goals I shall be very pleased and will no doubt have= learned a few things in the process.=A0

I see adverts for HF rigs, beams and linears costing thousands= of pounds and reflect that my entire VLF system cost about =A315,= maybe =A330 if I build a bigger PA.=A0 Playing with VLF suits me just fin= e and it an be don

73s
Roger G3XBM


On 28 May 2010 21:13, Andy Talbot <<= a href=3D"mailto:andy.g4jnt@googlemail.com" target=3D"_blank">andy.g4jnt@g= ooglemail.com> wrote:
Only to those of a,=A0 errr, well,=A0somewhat younger age.=A0=A0=A0=
800Hz to decent speakers,=A0=A0and its=A0a different matter....
=A0
Mind you, listening to a teenagers car just gone past, a few tens-Hz= of bass-boom goes a long way.=A0 He won't be hearing 8kHz in a few ye= ars time.
On 28 May 2010 20:50, John P-G <g= m4slv@sighthound.demon.co.uk> wrote:


On Fri,= 28 May 2010, Horst St=F6cker wrote:

> Hello dreamers
>> Unbelievable: 400m at by ear reception with only 4 Watt


<tounge firmly in cheek>

I'm amazed at the work= put in by the dreamers on this band, but just think
- 4W of 9kHz fed= to a decent speaker system - would be audible by the
human ear at 400m= , just as accoustic waves... surely??

</tounge in cheek>


Keep it up guys, this really /is/= LF if anything ever is. Makes 500kHz
seem light light-waves

J
GM4SLV




--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www= .youtube.com/user/g3xbm
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088



--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
--0016367faf558af2080487aded7f--