Return-Path: X-Spam-DCC: paranoid 1481; 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, SPF_PASS 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 uA2LeGcF025941 for ; Wed, 2 Nov 2016 22:40:17 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1c23DT-0003wh-Ha for rs_out_1@blacksheep.org; Wed, 02 Nov 2016 21:37:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1c23DT-0003wY-7z for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 21:37:03 +0000 Received: from smtp-out-so.shaw.ca ([64.59.136.139]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1c23DP-00029Q-RW for rsgb_lf_group@blacksheep.org; Wed, 02 Nov 2016 21:37:02 +0000 Received: from StevePC ([24.108.60.123]) by shaw.ca with SMTP id 23DJcfvhuKjjy23DKcEoNw; Wed, 02 Nov 2016 15:36:55 -0600 X-DKIM-Result: Domain=shaw.ca Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=shaw.ca; s=s20150330; t=1478122615; bh=lj6mU3M7VFRjlJzIRHr+pdnX5PSTeRUlPwEISwY7YeI=; h=From:To:References:In-Reply-To:Subject:Date; b=LYMrar+7Crb1ig/9c6jt5yNduygrqYEIpvM46fFF2V3yXNOWbQ7hx1F/ZV0xjSzK0 mwAVfPOciDSebCK46Z+KpNK7unMdHDhSLZN2w7IeMumAMmSHcQKWfzbos8vV7TmxJ5 AUXO1ayxo3PjlSVoLu0Qb3yQfOkN4y4O4jC90SdrnjF1amvN6RMYFu7/oxbJpNMj5t 9UuT2lTtV1+XaSf3p9oSwH1wd1xPhE5o7xFq4lLZKoSG3KL4LEeRB1dbX7SE4fQHpH m/D1DoC7fk2CqrMZCpyezbxKxkOtusKvHTqNbnpKUooo5CmEY0j9A3PHCAzNWaM8TL lUcX2N0mN836A== X-Authority-Analysis: v=2.2 cv=SPoybKnH c=1 sm=1 tr=0 a=02AN2SbtWL/JWAP7bjKH1A==:117 a=02AN2SbtWL/JWAP7bjKH1A==:17 a=IkcTkHD0fZMA:10 a=F3M5lZpKAAAA:8 a=_Dj-zB-qAAAA:8 a=eL5lqVd3AAAA:8 a=ICqx0QUejiOJxpFqzToA:9 a=QEXdDO2ut3YA:10 a=slCku8JSH3TyizEDQ3pD:22 a=c-cOe7UV8MviEfHuAVEQ:22 a=r5fwSD0_7PCr-xOGcPf9:22 Message-ID: <3AE1A816B0CB402AB1E75C3CEF20FC47@StevePC> From: "Steve" To: References: <158269908ce.marcocadeddu@tin.it> In-Reply-To: <158269908ce.marcocadeddu@tin.it> Date: Wed, 2 Nov 2016 14:36:57 -0700 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MIMEOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 X-CMAE-Envelope: MS4wfIDUbr4vBpnpQf5p+EDaRgEduOfb4QuC8761lfL1yWEGZDBM9LhToj9Es8lh8jjvYvHvV9Ggk7SCy6tKQklSyfJi3WkoYJ+IgMh8yphZpJqCEVsjWJxu Unpigyk8PW/VdMII3IoO8pZZJlfqSzfGKoTlepKpvgZrmzMGEUa2+bnJ X-Scan-Signature: c9c533f07c530c146486ecf89a00ebb1 Subject: Re: LF: Re: SWR Bridges Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=original 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 10.1.3.11 Content-Length: 2147 Status: O X-Status: X-Keywords: X-UID: 9360 Tnx Pete and Marco...yes, I agree that using an RF ammeter to set impedance match, once resonant, is a simple way for those that are without a scopematch. For most LF/MFers however, it is only a matter of time before they construct the scopematch! Steve 73 > > Hi Steve, > > wish to add just one comment sharing with you my experience. > For routine tests or measures on antennas since almost a dozen of > years use an home made VNA (I realized the N2PK VNA and still works > fine!) this make available visual and numerical datas which very > important to understand what I'm doing. As everybody, of course, I like > to have an instrument in line while transmitting just to see is > everything is "normal" and under control. For this purpose I made a > small console which includes the low pass filter, an RF ammeter and an > SWR bridge is very easy to design and make yourself such instrument I > made mine covering from 137kHz to 160m and I guess it is reliable at > least as all "in line" meters. > > 73 de Marco IK1HSS > > > ----Messaggio originale---- > Da: VE7SL@shaw.ca > Data: 2-nov-2016 19.12 > A: > Ogg: LF: Re: SWR Bridges > > Many thanks to all of those taking the time to reply to my inquiry. It > seems > that results vary depending upon what meter is being used but it sounds > as > though only a few are having reliable / accurate results. I normally > use the > scope match and call it the 'most valuable piece of gear in my shack' > but > was curious about suggesting the use of an HF SWR bridge for those that > do > not yet have such a thing, and if it would be a reliable method of > matching > an antenna. In some cases 'yes', but it seems, in most cases, may be > unreliable and only lead to confusion. > > > Steve 73 > > > > WEB - "The VE7SL Radio Notebook": http://members.shaw.ca/ve7sl > VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to > Nanowaves": > http://ve7sl.blogspot.ca/ > > > > > > WEB - "The VE7SL Radio Notebook": http://members.shaw.ca/ve7sl VE7SL BLOG - "Homebrewing and Operating Adventures From 2200m to Nanowaves": http://ve7sl.blogspot.ca/