Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mb06.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3A4883800009E; Wed, 19 Jun 2013 15:17:01 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1UpNXS-0002Hc-HW for rs_out_1@blacksheep.org; Wed, 19 Jun 2013 19:55:26 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1UpNXR-0002HH-Rc for rsgb_lf_group@blacksheep.org; Wed, 19 Jun 2013 19:55:25 +0100 Received: from nm6-vm6.bt.bullet.mail.ir2.yahoo.com ([212.82.99.221]) by relay1.thorcom.net with esmtps (TLSv1:AES256-SHA:256) (Exim 4.77) (envelope-from ) id 1UpNXP-0006nb-Qk for rsgb_lf_group@blacksheep.org; Wed, 19 Jun 2013 19:55:24 +0100 Received: from [212.82.98.44] by nm6.bt.bullet.mail.ir2.yahoo.com with NNFMP; 19 Jun 2013 18:55:22 -0000 Received: from [46.228.39.177] by tm5.bt.bullet.mail.ir2.yahoo.com with NNFMP; 19 Jun 2013 18:55:22 -0000 Received: from [127.0.0.1] by smtp118.bt.mail.ir2.yahoo.com with NNFMP; 19 Jun 2013 18:55:22 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=btinternet.com; s=s1024; t=1371668122; bh=LfT+TUiwC5s0ZDCmMLbOqaloVu+s35LN137afg0lOo8=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Message-ID:From:To:References:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-Antivirus:X-Antivirus-Status; b=VIcBfh8zTu8tIu9gX3yfp5aR0Q8gndLVP6Yr5KIH3lnlJyD9lO3CbxsID/NGwMGdzp+AkubSXPZuF5UfRGuDP2k8BKlSdEVobU8+wvALNP9dHuFSipePOLZmB3UyPqqF4Mq6f4Z00yqQE5svgwKxRqaRM8pcUDsAAv/UUqKTOMA= X-Yahoo-Newman-Id: 790723.37218.bm@smtp118.bt.mail.ir2.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 9wDrE2gVM1kLIMBo4punR.4_Cdzt0rvZTbDoJPdXAq2Eoul PH.KkhxTZNk_oo5AArFrYZ3.0dbQyOJ2lvNa3dlwxOVH1uMc3n5hfkMrWeV1 sjPRHX_8oxWUR9ld3kZbKpNWvJzAJvSyqolZX8ltHC1humE7B2Uv.Q7J1vMj IOts9A5ctCm5yRTaUxCKRxmL7giJpRxMsbXCn.uYfaymCIdMrm8cwa4Oienr mAAwmq1A3lAolpZhrdvwdv3QeLX3RFMoyeAzrHGm8a618wNVd0r3kk7iD6w3 O_VdH6xZJ_V.LCUG1ks1sip2JaZoCtfZw07o4ZHzYijqHYz5NYqI.X3nKTL3 3MlWxUbRvcL3aTy3ogoYfHi8o20Lshw6GVhbjBRtNygz_Zh_Z7J.RtH_lFIJ c27U3TroN4YDzM1uLxWOxq7pkvuzteY.aV.Rgipl6TXuEEMsARz6OV8aGyIi XqxilLkOgwfzf.p38xh5tUcpp2JtHekP6GO.fmCAh20t7roeE2msIQyTyvfk - X-Yahoo-SMTP: fpz.2VeswBBs59bVshRPmMN51lcO2lgFRIvE4XTqE8dRwOxd70E- X-Rocket-Received: from gnat (alan.melia@86.168.50.22 with login) by smtp118.bt.mail.ir2.yahoo.com with SMTP; 19 Jun 2013 18:55:22 +0000 UTC Message-ID: <7E3285A4BC1F4E938A3077055ECF7950@gnat> From: "Alan Melia" To: References: <088194F2A24545D3A5589B8F449BBFB1@p1800> Date: Wed, 19 Jun 2013 19:54:45 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.6157 X-Antivirus: avast! (VPS 130619-0, 19/06/2013), Outbound message X-Antivirus-Status: Clean X-Spam-Score: 0.0 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hi Federico, there could be a number of reasons for your problems. LF/MF does not travel as well in daylight as it does after dark. You are looking at a 1000km + path so you need good skywave. Operation after dark will give you about another 20dB at the receiver ar ranges greater than 700km [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [212.82.99.221 listed in list.dnswl.org] 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 3efbf4053c1a70bbeb6c0a0cc657f05e Subject: LF: Re: 630m Spain Content-Type: multipart/alternative; boundary="----=_NextPart_000_0026_01CE6D26.D8B8D620" 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=FORGED_MUA_OUTLOOK,HTML_40_50, 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: mtain-mb06.r1000.mx.aol.com ; domain : btinternet.com DKIM : fail x-aol-sid: 3039ac1d601a51c203ad4fca X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0026_01CE6D26.D8B8D620 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Federico, there could be a number of reasons for your problems. LF/MF does not travel as well in daylight as it does after dark. You are = looking at a 1000km + path so you need good skywave. Operation after = dark will give you about another 20dB at the receiver ar ranges greater = than 700km You may be running Maximum allowed power but on these bands it depends = where that power is going. The radiation resistance and the loss are in = series, and the Rrad is much smaller than the loss. You need to = experiment with reducing the ground loss which is probably taking the = majority of your available power. Halving the ground loss can in some = circumstances give you four times the radiated power. Good Luck Alan G3NYK ----- Original Message -----=20 From: Federico=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, June 19, 2013 6:46 PM Subject: LF: 630m Spain I've been three weeks calling CQ on the frequency of 472.5 kHz between = 17 and 17.30 UTC and listening to the band at different times of day without result. Keep calling CQ between 17 and 17.30. I would appreciate even if = negative controls. My signals at 20 km are strong and clean. A possible correspondent at 80 km, is fighting a strong local QRM. My signal does not activate the RX of Twente. My power is close to the maximum allowed. Federico EA2HB ------=_NextPart_000_0026_01CE6D26.D8B8D620 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Federico, there=20 could be a number of reasons for your problems.
 
LF/MF does not travel as well in = daylight as it=20 does after dark. You are looking at a 1000km + path so you need good = skywave.=20 Operation after dark will give you about another 20dB at the receiver ar = ranges=20 greater than 700km
 
You may be running Maximum allowed = power but on=20 these bands it depends where that power is going. The radiation = resistance and=20 the loss are in series, and the Rrad is much smaller than the loss. You = need to=20 experiment with reducing the ground loss which is probably taking the = majority=20 of your available power. Halving the ground loss can in some = circumstances give=20 you four times the radiated power.
 
Good Luck
Alan
G3NYK
----- Original Message -----
From:=20 Federico=20
Sent: Wednesday, June 19, 2013 = 6:46=20 PM
Subject: LF: 630m Spain

I've = been three weeks calling CQ = on the frequency of 472.5 kHz between 17=20 and 17.30 UTC
and listening to the band = at different times of day = without=20 result.
Keep=20 calling CQ between = 17 and=20 17.30. I would = appreciate even if negative controls.
My signals at 20 km are strong and=20 clean.
A possible correspondent at 80 km, is fighting a=20 strong local = QRM.
My signal does not=20 activate the RX of Twente.
My = power is close to the=20 maximum allowed.
Federico EA2HB
------=_NextPart_000_0026_01CE6D26.D8B8D620--