Delivered-To: daveyxm@virginmedia.com Received: by 10.50.142.105 with SMTP id rv9csp51067igb; Thu, 26 Jun 2014 05:12:13 -0700 (PDT) X-Received: by 10.194.22.201 with SMTP id g9mr17224037wjf.98.1403784732679; Thu, 26 Jun 2014 05:12:12 -0700 (PDT) Return-Path: Received: from post.thorcom.com (post.thorcom.com. [195.171.43.25]) by mx.google.com with ESMTP id ce8si9487324wjb.125.2014.06.26.05.12.10 for ; Thu, 26 Jun 2014 05:12:11 -0700 (PDT) Received-SPF: none (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: owner-rsgb_lf_group@blacksheep.org does not designate permitted sender hosts) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1X085g-0005GH-70 for rs_out_1@blacksheep.org; Thu, 26 Jun 2014 12:43:44 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1X085f-0005G8-OZ for rsgb_lf_group@blacksheep.org; Thu, 26 Jun 2014 12:43:43 +0100 Received: from know-smtprelay-omc-3.server.virginmedia.net ([80.0.253.67]) by relay1.thorcom.net with esmtp (Exim 4.82) (envelope-from ) id 1X085b-0003lu-WE for rsgb_lf_group@blacksheep.org; Thu, 26 Jun 2014 12:43:42 +0100 Received: from [192.168.1.6] ([86.11.222.118]) by know-smtprelay-3-imp with bizsmtp id Jzje1o02C2Zsi3201zjeL1; Thu, 26 Jun 2014 12:43:38 +0100 X-Originating-IP: [86.11.222.118] X-Spam: 0 X-Authority: v=2.1 cv=bPyYIZOZ c=1 sm=1 tr=0 a=SuBfSidSudpnzoPf7Jvm+w==:117 a=SuBfSidSudpnzoPf7Jvm+w==:17 a=HBVIMS3pqfoA:10 a=uObrxnre4hsA:10 a=9YlaCzn6_68A:10 a=kj9zAlcOel0A:10 a=NLZqzBF-AAAA:8 a=ubjPhkS7CdAH9O419FoA:9 a=CjuIK1q_8ugA:10 From: "Mike Dennison" To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@yahoogroups.co.uk Date: Thu, 26 Jun 2014 12:43:37 +0100 MIME-Version: 1.0 Message-ID: <53AC1579.29762.C84E42@mike.dennison.ntlworld.com> In-reply-to: <3E2191D6995647D48932529876C7636C@gnat> References: , <3E2191D6995647D48932529876C7636C@gnat> X-mailer: Pegasus Mail for Windows (4.41) Content-description: Mail message body 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: On 25 Jun 2014 at 21:55, Alan Melia wrote: > > It is interesting that there does seem to be a suggestion that 137 > holds up better in summer than 472.......have I read that correctly, > or maybe it was from another poster. I was not able to do the same > sort of tests for 472. [...] 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 [80.0.253.67 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record X-Scan-Signature: f62c7cf8eeb8e5a327b71719e9bffff1 Subject: LF: RE: Summer Solstice Test report Content-type: text/plain; charset=US-ASCII Content-transfer-encoding: 7BIT X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 On 25 Jun 2014 at 21:55, Alan Melia wrote: > > It is interesting that there does seem to be a suggestion that 137 > holds up better in summer than 472.......have I read that correctly, > or maybe it was from another poster. I was not able to do the same > sort of tests for 472. I haven't done any scientific tests, but from a lot of monitoring it seems that for daytime ranges around 500-1000km 136kHz works better than 472kHz. I presume this because the 136kHz daytime propagation over this distance is primarily by ground wave, whereas on 472kHz the ground wave range is less so sky-wave is needed and this is not available until dusk. It is difficult to compare the two bands over longer distances because 472kHz is not available in Russia (unlike 136kHz), and activity seems low in many other countries. Personally, I have been disappointed by the amount of DX received during darkness hours on 472kHz so far. It seems commonplace to receive stations out to Scandinavia and Italy, but little beyond. Yes, I have seen some transatlantic DX but nothing to match the stories of worldwide openings reported by retired marine 500kHz operators, or indeed what is availalable routinely on 160m. Is this just lack of activity? de Mike, G3XDV ============