Return-Path: X-Spam-DCC: paranoid 1290; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.4 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id t19KwYS6000541 for ; Mon, 9 Feb 2015 21:58:35 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1YKvMf-0000DF-C9 for rs_out_1@blacksheep.org; Mon, 09 Feb 2015 20:55:29 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1YKvMf-0000D2-1F for rsgb_lf_group@blacksheep.org; Mon, 09 Feb 2015 20:55:29 +0000 Received: from mout.gmx.net ([212.227.15.18]) by relay1.thorcom.net with esmtp (Exim 4.85) (envelope-from ) id 1YKvMd-0001EN-A0 for rsgb_lf_group@blacksheep.org; Mon, 09 Feb 2015 20:55:27 +0000 Received: from Clemens0811 ([79.237.158.51]) by mail.gmx.com (mrgmx003) with ESMTPSA (Nemesis) id 0M8Nik-1XQSr91ns2-00vxHu for ; Mon, 09 Feb 2015 21:55:25 +0100 From: "Clemens Paul" To: References: <54D77171.6000107@gmail.com> <54D7E234.8080004@gmail.com> <54D7E5BB.4000407@virginbroadband.com.au> <54D7ED93.3040904@gmail.com> In-Reply-To: <54D7ED93.3040904@gmail.com> Date: Mon, 9 Feb 2015 21:55:24 +0100 Message-ID: MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 Thread-Index: AdBD9QOWpXllDJu2QQ22RWurEkKyNwAtVFEw X-MimeOLE: Produced By Microsoft MimeOLE V6.1.7601.17609 X-Provags-ID: V03:K0:1zm/xyMJ5uLjsKD/xFWEcyxtbnL/2OicBT9kzRvwPgI5QivjJk1 5ni98Ln+nWIA9G8WE2ciDD26Fsrllj7gsg8t5oMq3u/BQdT4s3BYMPZZ+nfIaT5MmhHgDA2 fkcYhhgmaYvGnHVkpj1OEJuv1vr8tFA1sRIZmOfrZIiRTe8/9OIODG8GfLV5m+WzI4vEtYA MmQDDvpQPgSwlcqBzkfJg== X-UI-Out-Filterresults: notjunk:1; X-Scan-Signature: c1f72e5acb1277e013f90c915ad7ad68 Subject: RE: LF: WSPR MF please Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 2297 Hi Stefan, what is the impedance of your RX input? 73 Clemens DL4RAJ >-----Original Message----- >From: owner-rsgb_lf_group@blacksheep.org >[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC >Sent: Monday, February 09, 2015 12:13 AM >To: rsgb_lf_group@blacksheep.org >Subject: Re: LF: WSPR MF please >There's just one thing: The T antenna in the garden is >resonated and matched to 50 Ohm. However i forgot to connect a >50 Ohm terminating resistor to the RX input. Probably the >matched antenna does not act as a perfect bandpass for all >frequecies and maybe there's a standing wave on the 20m long >coax cable, resulting in a high input voltage in the HF or >lower VHF range? > >The band noise was about 15...17 dB above the RX noise so >there is some space. I will repeat the test and will use a 50 >Ohm terminating resistor. I don't expect much difference but anyway :-)