Return-Path: Received: from rly-mg06.mx.aol.com (rly-mg06.mail.aol.com [172.20.83.112]) by air-mg10.mail.aol.com (v121_r2.12) with ESMTP id MAILINMG103-a1a48b5073312d; Wed, 27 Aug 2008 03:50:26 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-mg06.mx.aol.com (v121_r2.11) with ESMTP id MAILRELAYINMG064-a1a48b5073312d; Wed, 27 Aug 2008 03:50:14 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1KYFmT-0001jK-Gb for rs_out_1@blacksheep.org; Wed, 27 Aug 2008 08:49:29 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1KYFmT-0001jB-3m for rsgb_lf_group@blacksheep.org; Wed, 27 Aug 2008 08:49:29 +0100 Received: from cavuit01.kulnet.kuleuven.be ([134.58.240.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1KYFmQ-0006s8-QC for rsgb_lf_group@blacksheep.org; Wed, 27 Aug 2008 08:49:29 +0100 Received: from smtps01.kuleuven.be (smtpshost01.kulnet.kuleuven.be [134.58.240.74]) by cavuit01.kulnet.kuleuven.be (Postfix) with ESMTP id 193277B897D for ; Wed, 27 Aug 2008 09:47:22 +0200 (CEST) Received: from smtps01.kuleuven.be (localhost [127.0.0.1]) by smtps01.kuleuven.be (Postfix) with ESMTP id EF55431E703 for ; Wed, 27 Aug 2008 09:47:21 +0200 (CEST) Received: from dell-rik.fys.kuleuven.be (dhcp-10-33-85-199.fys.kuleuven.be [10.33.85.199]) by smtps01.kuleuven.be (Postfix) with ESMTP id CC39131E702 for ; Wed, 27 Aug 2008 09:47:21 +0200 (CEST) X-Mailer: QUALCOMM Windows Eudora Version 7.1.0.9 Date: Wed, 27 Aug 2008 09:47:35 +0200 To: rsgb_lf_group@blacksheep.org X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe In-Reply-To: <48B4F663.50303@telia.com> References: <20080826215353.05fced57@lurcher.twatt.local> <48B4F663.50303@telia.com> Mime-Version: 1.0 Message-Id: <20080827074721.CC39131E702@smtps01.kuleuven.be> X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Karma: 0: X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Subject: LF: QRV on 500 Content-Type: text/plain; charset="us-ascii"; format=flowed 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 X-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : n X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : n Dear all, last night I did some first test on 500kHz after my "summer recess". Good: I found out that my digging over the past months had some success, the antenna current is up with 10% (now 2.2A). Based on antenna simulation (with MMANA-GAL) the theoretical EIRP should be 4.7 Watt, close to my 5 W EIRP limit. But I guess that in reality it will be some dB less due to absorption in the surrounding greenery. I will have to do some ERP measurements to check how much is lost. At 20.30 UT I could see my signal on various grabbers, up to the Shetlands. Bad: I found out that some bad "machine gun type" interference has shown up. The noise blanker of the TS440 can bring it down a bit, but it still compromises any weak signal reception. I can null it out with a loop, but unfortunately it is the same direction as southern UK. So using a loop RX antenna is not a good solution. If I cannot track down (and shut down) the source of interference I will have to cancel it out some way. An additional noise blanker? Or picking up the interference signal with a local "sense antenna" and use that to phase it out (combine it with the right phase and amplitude with the signal from the main antenna)? All suggestions are welcome. 73, Rik ON7YD Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm