Return-Path: Received: (qmail 26441 invoked from network); 18 Sep 2002 10:37:53 -0000 Received: from murphys.services.quay.plus.net (212.159.14.225) by mailstore with SMTP; 18 Sep 2002 10:37:53 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: (qmail 20144 invoked from network); 18 Sep 2002 10:37:41 -0000 Received: from post.thorcom.com (193.82.116.70) by murphys.services.quay.plus.net with SMTP; 18 Sep 2002 10:37:41 -0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 17rcCK-00032I-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 18 Sep 2002 11:36:44 +0100 Received: from [205.188.157.39] (helo=imo-d07.mx.aol.com) by post.thorcom.com with esmtp (Exim 4.10) id 17rcCJ-000323-00 for rsgb_lf_group@blacksheep.org; Wed, 18 Sep 2002 11:36:43 +0100 Received: from MarkusVester@aol.com by imo-d07.mx.aol.com (mail_out_v34.10.) id l.f6.2180739b (15900) for ; Wed, 18 Sep 2002 06:36:04 -0400 (EDT) Received: from aol.com (mow-m13.webmail.aol.com [64.12.180.129]) by air-id09.mx.aol.com (v88.21) with ESMTP id MAILINID93-0918063604; Wed, 18 Sep 2002 06:36:04 -0400 Date: Wed, 18 Sep 2002 06:36:24 -0400 From: MarkusVester@aol.com To: rsgb_lf_group@blacksheep.org Message-ID: <72FB3772.0FA67174.28FF0FBC@aol.com> X-Mailer: Atlas Mailer 2.0 Subject: LF: Re: RX3QFM ERP X-Spam-Status: No, hits=1.3 required=5.0tests=NO_REAL_NAME,DEAR_SOMEBODY,DOUBLE_CAPSWORD,SUPERLONG_LINEversion=2.31 X-Spam-Level: * Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit Dear Alex, David and Group, > Just a thought, but isn't an antenna current of 2.75A a bit low for 0.5W ERP? In my opinion, Vlad's ERP estimation seems not so unreasonable: ERP=0.5W, EMRP=ERP/1.83=0.27W, Rrad=EMRP/I^2=0.036 Ohm, h_eff=lambda*SQR(Rrad/1579Ohm)=10.5m. Of course, effective height is affected by capacitive shunts and near-field shielding effects, but heff=10m could certainly be achieved having a 20m high topload. But still, in spite of trying I haven't seen a trace of Vlad's signal here either. Where is he located? And could you perhaps measure his frequency more accurately relative to DBF39's carrier (138830.03 Hz)? - Besides the heavy QRN, here in Germany the lower part of the band is somewhat affected by DCF transmitter intermodulation, so a frequency above 137 kHz might be clearer for us. 73 de Markus, DF6NM