Return-Path: Received: from mtain-mj03.r1000.mx.aol.com (mtain-mj03.r1000.mail.aol.com [172.21.164.87]) by air-dc02.mail.aol.com (v129.10) with ESMTP id MAILINDC023-864e4dbc398c1e; Sat, 30 Apr 2011 12:32:12 -0400 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mj03.r1000.mx.aol.com (Internet Inbound) with ESMTP id 17309380000A7; Sat, 30 Apr 2011 12:32:10 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QGD4d-0003iG-2h for rs_out_1@blacksheep.org; Sat, 30 Apr 2011 17:31:15 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QGD4c-0003i7-EX for rsgb_lf_group@blacksheep.org; Sat, 30 Apr 2011 17:31:14 +0100 Received: from mail-iw0-f171.google.com ([209.85.214.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QGD4Z-0007jR-R2 for rsgb_lf_group@blacksheep.org; Sat, 30 Apr 2011 17:31:14 +0100 Received: by iwn8 with SMTP id 8so5793155iwn.16 for ; Sat, 30 Apr 2011 09:31:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:content-type; bh=O9EAUGgg6FvxqEFFSWuWG5Lpain57qsl7Z04y3gpk+Q=; b=LoxavWZJ5lwSZnqRNj8xfoFhP0unwZtTbciBddxlWY7CAJvAjkv3lgricLnwv36+ZD KOih+THTpu436pMhb3zxnn8ZEMpgvNqvChCGVbIVcvjsOZb+MFTfRLCs1z2IJNqEgi5h nkvu6GaDl4tF1MT2jGfajuJ1Bhs/wDERkODMU= 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=tvcg48Mfk1ASIt3sLJ4c/8NGu1WU2NgSzbyG1LjIUG6pfS1nbGxt1voFRp8uvcU1mJ AXtgPZxfcVa8xQoHcWnqLzviw41OWsy63QuBcHmYZGYRD406owDX4N8uBGFEq+cDf2HS bWMz2b5BsTzjS/+4keeLCiKvvxQHC0wVgCa38= MIME-Version: 1.0 Received: by 10.42.141.196 with SMTP id p4mr7986477icu.180.1304181064850; Sat, 30 Apr 2011 09:31:04 -0700 (PDT) Received: by 10.42.221.133 with HTTP; Sat, 30 Apr 2011 09:31:04 -0700 (PDT) In-Reply-To: References: Date: Sat, 30 Apr 2011 17:31:04 +0100 Message-ID: From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=0.276 Subject: Re: LF: RE: 137kHz QRSS30 beaconing still - reports appreciated Content-Type: multipart/alternative; boundary=90e6ba6e869e17dbfe04a22551ff X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.1 required=5.0 tests=HTML_30_40,HTML_FONTCOLOR_BLUE, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE,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-d014.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039400c89a64dbc398a2692 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --90e6ba6e869e17dbfe04a22551ff Content-Type: text/plain; charset=ISO-8859-1 *Dave* That is an excellent screen shot - most impressive! I generate the frequency by dividing a 3.560MHz crystal by 26 and I am unable to measure the frequency very accurately. It should be 137.6748kHz, but this could be off a bit. * Marcus* Next week I shall have a 3.582MHz crystal (30p from GQRP club) which, when divided by 26, will place me around 137.769kHz which is closer to the window looked in by the grabbers. The beacon produces 2.4W (measured into 50 ohms) and the ERP from the fairly thin wire loop is estimated as around 50uW. My WSPR beacon produces around 3dB more. 73s Roger G3XBM On 30 April 2011 14:22, Dave G3WCB. wrote: > Roger, LF, > > Latest screen grab attached. I switched to my 1.2m tuned loop, and your > signal improved by at least 3dB, maybe as much as 6 dB. See attached > screenshot. > > BTW, I make your frequency to be 137676.0. I have a small frequency error > which makes signals read high by 0.3 Hz. The line at 137680.40 is a locally > generated signal in 137680.0, which is pretty accurate. > > The line appearing at 137676.8 (137676.5 actual) is a mystery - maybe it's > a Loran line. > > How many watts are you puttting into your loop? > > 73, Dave G3WCB IO91RM > > > > -----Original Message----- > *From:* owner-rsgb_lf_group@blacksheep.org [mailto: > owner-rsgb_lf_group@blacksheep.org]*On Behalf Of *Roger Lapthorn > *Sent:* 30 April 2011 12:16 > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: 137kHz QRSS30 beaconing still - reports appreciated > > My QRSS30 (slow CW) LF beacon will continue until this evening. Only one > report so far G3WCB at 101km. > > Message: *XBM* in QRSS30, pause, then G3XBM in 10wpm > Freq: 137.6748kHz > ERP: 50uW (antenna 80sq m vertical loop) > Location: JO02dg, Burwell Cambs > > *Any reports and screen grabs would be much appreciated.* > > 73s > Roger G3XBM > > > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > https://sites.google.com/site/sub9khz/ > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm https://sites.google.com/site/sub9khz/ --90e6ba6e869e17dbfe04a22551ff Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Dave

That is an excellent screen shot - most impressive! I= generate the frequency by dividing a 3.560MHz crystal by 26 and I am unab= le to measure the frequency very accurately. It should be 137.6748kHz, but= this could be off a bit.

Marcus

Next week I shall have a 3.582MHz crystal (30p fr= om GQRP club) which, when divided by 26, will place me around 137.769kHz= which is closer to the window looked in by the grabbers.

The beaco= n produces 2.4W (measured into 50 ohms) and the ERP from the fairly thin= wire loop is estimated as around 50uW. My WSPR beacon produces around 3dB= more.

73s
Roger G3XBM


On 30 April= 2011 14:22, Dave G3WCB. <ganymede444@btopenworld.com> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1p= x #ccc solid;padding-left:1ex;">
Roger,=20 LF,
=A0
Latest=20 screen grab attached. I switched to my 1.2m tuned loop, and your signal im= proved=20 by at least 3dB, maybe as much as 6 dB. See attached=20 screenshot.
=A0
BTW, I=20 make your frequency to be 137676.0. I have a small frequency error which= makes=20 signals read high by 0.3 Hz. The line at 137680.40 is a locally generated= signal=20 in 137680.0, which is pretty accurate.
=A0
The=20 line appearing at 137676.8 (137676.5 actual) is a mystery - maybe it's= a Loran=20 line.
=A0
How=20 many watts are you puttting into your loop?
=A0
73,=20 Dave G3WCB IO91RM
=A0
=A0
-----Or= iginal Message-----
From:=20 = owner-rsgb_lf_group@blacksheep.org=20 [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Roger= =20 Lapthorn
Sent: 30 April 2011 12:16
To:=20 rsgb_l= f_group@blacksheep.org
Subject: LF: 137kHz QRSS30 beaconing= =20 still - reports appreciated

My QRSS30 (slow CW) LF= beacon=20 will continue until this evening. Only one report so far G3WCB at=20 101km.

Message: =A0=A0=A0=A0=A0=20 XBM in QRSS30, pause, then G3XBM in 10wpm
Freq:=20 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=20 137.6748kHz
ERP:=20 =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 50uW=20 (antenna 80sq m vertical loop)
Location: =A0=A0=A0=A0=A0=20 JO02dg, Burwell Cambs

Any reports and screen grabs would= be=20 much appreciated.

73s
Roger G3XBM
=


--
http://g3xbm-qrp.blogsp= ot.com/
http://www.g3xbm.co.u= k
h= ttp://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/<= /a>




--
http://g3xbm-qrp.blogspot.com/<= br>http://www.g3xbm.c= o.uk
http://www= .youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
--90e6ba6e869e17dbfe04a22551ff--