Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id x0EBrXlU021954 for ; Mon, 14 Jan 2019 12:53:34 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gj0jC-0001nS-Sq for rs_out_1@blacksheep.org; Mon, 14 Jan 2019 11:48:26 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gj0iw-0001nJ-PI for rsgb_lf_group@blacksheep.org; Mon, 14 Jan 2019 11:48:10 +0000 Received: from mout.gmx.net ([212.227.17.21]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1gj0it-00069b-Qe for rsgb_lf_group@blacksheep.org; Mon, 14 Jan 2019 11:48:08 +0000 Received: from Clemens0811 ([79.223.10.168]) by mail.gmx.com (mrgmx101 [212.227.17.168]) with ESMTPSA (Nemesis) id 0MEKZg-1gTZJF37Pc-00FThW for ; Mon, 14 Jan 2019 12:48:05 +0100 From: "Clemens Paul" To: References: <10049730.U2aOLNr8sH@x220> In-Reply-To: <10049730.U2aOLNr8sH@x220> Date: Mon, 14 Jan 2019 12:48:04 +0100 Message-ID: <7C7094AC5A724A6097D0AC30B5935EBF@Clemens0811> MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook 11 Thread-Index: AdSrcgF6o3H8FBLURMeHl3CvwqmIrgAi0fEA X-MimeOLE: Produced By Microsoft MimeOLE X-Provags-ID: V03:K1:9kn3miKXLK/HdBGuHv4ynsbU1WlNXmsI88K1Zavbcz0c1bOPmhA pQHvHEK77ZjNUkHqS4Z6qzE4fNRsbCQBMG8NCDUT1B3TAAXb3DTdVyh7ayQwQljHSQqA1Ls BNFoL5NvDnJ9i3ExKnueNZnGiVb7Ea175cpMoUm9fmxfbLfLVy9W7qd7h9YflAzpXolXIUo f0qYia16cN94uy2+0Q7kQ== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:LtgfcoPWOUo=:Ji0CuqRbDb+eLhg+usGl7m k2GZ5hW4WkPgIA8X0H86yHJPOSmbAR+AWNtBpQB3kl9ht7xtzGMU06PDQMMM3t/LlPCkWXyye T6OznqSwzQN9fu+QK8HqO7DnHGh2K8Xzj3OaHH8QW5Xtl8xo2arbEAZPaPIWQAkz5zZ384hgk 5hNmaAXtglCxh5EcLg46yeFJ2SRtZAwFWrHP9Os74wjQKN5FNTa2IXG8IH+u0c8eY0Zly+ws0 luUyVCNTCY16jokcwNzDcJQp052Jlw+UCi4fjQABjtju0mhEqpk78SAG2MUqMzhyD+Yg3jmJI k+VV4tiRHX9yj42RJwa4yf4ELA5tSU8fz0v1mBPYi8fsbjKDhfwi+rAZ7EpaAbVcAWUYDyk92 rE61C9d2J5SvwJcSqjvRgogyrkxJZvjXELUdEJ310nMY9QeEq76RL178jzNf/tc30oH3qLwcL XsHt49H4cQ7nAGgCdU6WPOaWn+brgemq9ry6GzMdvZPv5EitAf/3ZH3x6b9wY5J4KpxMpkv+0 mGnBvUeeVdz1I42prp3GWeQYhxiZJksswbJ0tLYPZpT5iEXpooEu9sXCa+y3A4xqpmFzHcxtp wxeOSMtxSYyTeObJKBqwLkieLLt9pj/siQFfv9zzYqbvwbLTSPumCR3fe+RHRvdFUc7RxDfJ/ AuVNUO6HK/jg+txii9M52ryEB+qNcgXp0zSQCbNNK9H+Ew3sh7EogtvC51Tv+Lg8RvIMbYWci HgjEadF3ssUCgq7QtyoWlnOWQSI3eVpR4VZXq//hn1tlZ1Wv5zCitY9X1DWTy0Cl8RTBp6nxd vH1aUXEV8yKr6cVX8Yew78506FifUTKl4AlLaqhPxr88vOfTRpkmzc3qVA4oKXSrJEQbJuarX xwUdh19DhGLUsKgft0dXquQwmC0nSdx2BI4IrcS2Fwcht2be1Asr7VlLVSh9WB X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hi Claudio, >...some people can't live without the SWR meter on the >transmission line: the harmonics not irradiated return toward >the Tx and the SWR meter show an high value: terrible!!! >but if you have a LPF the SWR is also high BEFORE the filter Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [212.227.17.21 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (cpaul[at]gmx.net) X-Scan-Signature: c1f72e5acb1277e013f90c915ad7ad68 Subject: RE: LF: Low Pass Filtering Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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 Hi Claudio, >...some people can't live without the SWR meter on the >transmission line: the harmonics not irradiated return toward >the Tx and the SWR meter show an high value: terrible!!! >but if you have a LPF the SWR is also high BEFORE the filter If you have the usual configuration TX->LPF->SWR_Meter->Antenna the indicated SWR will NOT be spoiled by returning harmonics because they are attenuated by the LPF and reflected into the TX. So only extremely weak harmonics make it to the antenna. Their refeflection by the antenna does'nt change SWR measurably. 73 Clemens DL4RAJ >-----Original Message----- >From: owner-rsgb_lf_group@blacksheep.org >[mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Claudio Pozzi >Sent: Sunday, January 13, 2019 7:54 PM >To: rsgb_lf_group@blacksheep.org >Subject: Re: LF: Low Pass Filtering > >On Sunday, January 13, 2019 04:35:19 PM you wrote: