Return-Path: Received: (qmail 4992 invoked from network); 28 Jan 2000 16:44:22 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 28 Jan 2000 16:44:22 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12EEGY-0000zB-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 28 Jan 2000 16:28:58 +0000 Content-Transfer-Encoding: 8bit Received: from mail.sci.fi ([195.74.0.41] helo=pyyhe.saunalahti.fi ident=root) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12EEGU-0000z6-00 for rsgb_lf_group@blacksheep.org; Fri, 28 Jan 2000 16:28:54 +0000 X-Priority: 3 Received: from default (DXCVI.tdyn.saunalahti.fi [195.197.80.96]) by pyyhe.saunalahti.fi (8.9.1/8.9.1) with SMTP id SAA09430 for ; Fri, 28 Jan 2000 18:39:17 +0200 (EET) X-MSMail-Priority: Normal Message-ID: <3.0.6.32.20000128182930.008c3d10@laatikko.saunalahti.fi> X-Sender: oh2lx@laatikko.saunalahti.fi (Unverified) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Fri, 28 Jan 2000 18:29:30 +0200 To: rsgb_lf_group@blacksheep.org From: =?iso-8859-1?Q?V=E4in=F6_Lehtoranta?= Subject: LF: Decca signal strength in OH2 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: A Study of Nighttime LF Signal Strength variations During next two months it will be possible to measure the signal strength of 7 existing UK Decca chains. My aim is to measure them daily 21-22 UTC, if possible. Only Green frequencies will be checked, due to QRM etc. ------------------------------------------------------ 127.8 N Scottish (6C), Lerwick, 1435, 280, 126.7 Northumbrian (2A), Peterhead, 1565, 269, 128.5 Hebridean (8E), Butt of Lewis, 1766, 276, 127.0 N British (3B), Neston, 1871, 257, 127.5 English (5B), East Hoathley, 1890, 247, 128.2 Irish (7D), Dungloe, 2060, 267, 126.4 SW British (1B), St. Mary's, 2282, 253, ------------------------------------------------------ kHz Decca Chain / Station d,km AZI ------------------------------------------------------ 128.93 Mainflingen (EFR) (Reference stn) 1553, 228, ------------------------------------------------------ (R&S ESH2/---- 10m coax---/1:10/---15m wire-----): Noise level with antenna: with 200Hz IF BandWidth: -24..-22 dB(uV), -131..-129dBmW (varies w qrm etc) ------------------------------------------------------ NOTE: The ultimate goal here would be the measured (indicated) FIELD STRENGTH (Fs) (in dBuV/m). In everyday practice it is seldom possible to measure Fs, so the RECEIVER INPUT VOLTAGE (dBuV) converted to RECEIVED POWER will be given (dBmW). Later, during warmer wx conditions it should be possible to make parallel measurements using calibrated R&S HFH2-Z2 antennas to obtain the approximate system correction factor for my poor 15 m wire, which should be rather non-directional. QUESTION: Can anyone tell where to ask for a battery connector for my R&S ESH2 Meas Receiver? Type is: Lemosa, Type F.c 2304 6,7 (see below) ==================| .. |_ . o o . | . o o . ====================| .. 73 from Vaino, OH2LX (60N34 024E58) KP20LN ---------------------------------------------------------- V.K.Lehtoranta, OH2LX, POBox 50, FIN-05401 Jokela, Finland ------ Tel: +358-9-4173965 ---- Fax: +358-9-4173961 ------ E-mail: vaiski@dlc.fi - alias: oh2lx@dlc.fi & oh2lx@sral.fi