Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 79599380000BD; Tue, 2 Aug 2011 15:08:40 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QoKJC-000667-UK for rs_out_1@blacksheep.org; Tue, 02 Aug 2011 20:07:18 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QoKJC-00065y-Gs for rsgb_lf_group@blacksheep.org; Tue, 02 Aug 2011 20:07:18 +0100 Received: from out1.ip05ir2.opaltelecom.net ([62.24.128.241]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QoKJA-0005lY-RP for rsgb_lf_group@blacksheep.org; Tue, 02 Aug 2011 20:07:18 +0100 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgAFAP9JOE5cHYoY/2dsb2JhbABClBIDk1J4gTsUAQEDSQIsAggCAQcBHDkBBBoGJB0BAgIBAYddn0SgBoZCBIcrnDU X-IronPort-AV: E=Sophos;i="4.67,307,1309734000"; d="scan'208,217";a="350302143" Received: from host-92-29-138-24.as13285.net (HELO xphd97xgq27nyf) ([92.29.138.24]) by out1.ip05ir2.opaltelecom.net with SMTP; 02 Aug 2011 20:07:10 +0100 Message-ID: <001601cc5147$61942b50$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: "rsgb" Date: Tue, 2 Aug 2011 20:07:09 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Poor antennas Content-Type: multipart/alternative; boundary="----=_NextPart_000_0013_01CC514F.C2E14070" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,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-SCORE: 0:2:362625984:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1dc1494e384b37321f 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_0013_01CC514F.C2E14070 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable LF It now takes hundreds of watts to be observed or heard around EU on 137 = Khz whereas some years back less than 200 watts achieved a good result = like a QSO on CW. The 130 watt Ropex used by many resulted in many CW = QSO'S,=20 In those days most Amateurs were using normal antennas like loaded inv L = systems or some sort of vertical for both RX es TX. At present the trend seems to be probe or small loop antennas and these = do not seem to produce enough signal capture to the RX. The DX that I have worked in the past all had large antenna systems. These are my observations, maybe others have another theory. de mal/g3kev ------=_NextPart_000_0013_01CC514F.C2E14070 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
LF
It now takes hundreds of watts to be observed or = heard=20 around EU on 137 Khz whereas some years back less than 200 watts = achieved a=20 good result like a QSO on CW. The 130 watt Ropex used by many resulted = in many=20 CW QSO'S,
In those days most Amateurs were using normal = antennas=20 like loaded inv L systems or some sort of vertical for both RX es=20 TX.
At present the trend seems to be probe or small = loop=20 antennas and these do not seem to produce enough signal capture to the=20 RX.
The DX that I have worked in the past all had = large=20 antenna systems.
These are my observations, maybe others have = another=20 theory.
de mal/g3kev
 
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