Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mk06.r1000.mx.aol.com (Internet Inbound) with ESMTP id E3080380021BD; Thu, 23 Feb 2012 09:31:16 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1S0ZNv-0002EN-5c for rs_out_1@blacksheep.org; Thu, 23 Feb 2012 14:11:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1S0ZNu-0002EE-2l for rsgb_lf_group@blacksheep.org; Thu, 23 Feb 2012 14:11:02 +0000 Received: from cmsout01.mbox.net ([165.212.64.31]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1S0ZNt-00005f-3P for rsgb_lf_group@blacksheep.org; Thu, 23 Feb 2012 14:11:02 +0000 Received: from cmsout01.mbox.net (cmsout01-lo [127.0.0.1]) by cmsout01.mbox.net (Postfix) with ESMTP id EBE8C2AC7DE for ; Thu, 23 Feb 2012 14:10:53 +0000 (GMT) X-USANET-Received: from cmsout01.mbox.net [127.0.0.1] by cmsout01.mbox.net via mtad (C8.MAIN.3.72B) with ESMTP id 388qBwokY9120M01; Thu, 23 Feb 2012 14:10:50 -0000 X-USANET-Routed: 3 gwsout-vs Q:bmvirus Received: from cmsapps02.cms.usa.net [165.212.11.138] by cmsout01.mbox.net via smtad (C8.MAIN.3.72B) with ESMTP id XID562qBwokY6362X01; Thu, 23 Feb 2012 14:10:50 -0000 X-USANET-Source: 165.212.11.138 IN dibene@usa.net cmsapps02.cms.usa.net X-USANET-MsgId: XID562qBwokY6362X01 Received: from [127.0.0.1] [151.55.28.95] by cmsapps02.cms.usa.net (ESMTPSA/dibene@usa.net) via mtad (C8.MAIN.3.72B) with ESMTPSA id 738qBwokY0368M38; Thu, 23 Feb 2012 14:10:50 -0000 X-USANET-Auth: 151.55.28.95 AUTH dibene@usa.net [127.0.0.1] Message-ID: <4F4648E6.2010202@usa.net> Date: Thu, 23 Feb 2012 15:10:46 +0100 From: Alberto di Bene User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000501ccf191$e3929c50$0401a8c0@xphd97xgq27nyf> <4F455C82.9040303@usa.net> <4F463F6E.4060008@iup.uni-heidelberg.de> In-Reply-To: <4F463F6E.4060008@iup.uni-heidelberg.de> X-Enigmail-Version: 1.3.5 X-Antivirus: avast! (VPS 120223-0, 02/23/2012), Outbound message X-Antivirus-Status: Clean Z-USANET-MsgId: XID738qBwokY0368X38 X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,MIME_HTML_ONLY=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: DK7FC in North Italy Content-Type: text/html; charset=windows-1252 Content-Transfer-Encoding: quoted-printable X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MIME_HTML_ONLY 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: 0:2:472033952:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d618a4f464db4286d X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none On 2/23/2012 2:30 PM, Stefan Sch=E4fer wrote:

Hi Alberto,

That looks fine. I'm glad to get a report from you, thank you.
How long was that wire and was it in the house or outside? :-)

Hi Stefan,

=A0=A0 oh, that wire was just a dipole for the 40m band, directly connected to the receiver, without any form of tuning for the 137kHz band.
Signals are low, but so also is the noise...=A0 :-)=A0=A0=A0=A0
Often is advantageous to have a not so high gain antenna... the S/N ratio can improve... not always, but sometimes yes.

That dipole is low in height. Actually it is an inverted V, with the apex at 10m from the ground.
For the LF band I have also a mini whip, temporarily out of service, as I used the coax feeding it for some tests of a differential active antenna,
with two beer cans spaced abt 1.5m connected to the differential inputs of a high impedance amplifier.=A0 It works quite well, as it= =A0 does
not need to be referred to a ground potential, but maybe I have to change the schematic of that transimpedance amplifier, as it
exhibits more intermodulation that I thought it should have....

73=A0 Alberto=A0 I2PHD