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 w9MDPoKF030572 for ; Mon, 22 Oct 2018 15:25:56 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gEZwZ-0007uR-OX for rs_out_1@blacksheep.org; Mon, 22 Oct 2018 14:08:27 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gEZst-0007tz-Lr for rsgb_lf_group@blacksheep.org; Mon, 22 Oct 2018 14:04:39 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gEZsr-00083h-9U for rsgb_lf_group@blacksheep.org; Mon, 22 Oct 2018 14:04:38 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 22BE92400E6 for ; Mon, 22 Oct 2018 15:04:21 +0200 (CEST) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1540213462; bh=BJuC6DdTdt8PNgAOVYsQnSe26je4EHaM6pp0+lCbYPM=; h=Date:From:To:Subject:From; b=HKxaq3Pxg1dvK7echHVPrKrDU+7JGAAI7jxaYhqpXz0zsXoEp6hGnuLTeGuWsk3FV I7nDWrLod6ETAYIKipLLupyg4BhfIOVET09GeQc+m2gaIfREEAGDaB+wyt3Dg+NKsg d2TPkhFLiGOtwKredtCNz3cx7RMHL5aKvMn28XKSRw+qUIAMCfSB+DwzcbvQSf0Pyh Jea3ALve676E6plFx31aKFx6jd36iy16L2V0De7+JPMCZ/9JbCShf7vI9PR3g0l1Ut jUb91WQmfgvRjpzu7amUa5wPRLQInJ7N+gMIrufPDjhzmRxNJgxF3OtwqY6cVs+n3X AGiwzCYHPzTmQ== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 42dxYd44D7z9rxN for ; Mon, 22 Oct 2018 15:04:21 +0200 (CEST) Message-ID: <5BCDCAD5.707@posteo.de> Date: Mon, 22 Oct 2018 15:04:21 +0200 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: Rogowski-coils for RF measurements References: <5BCC66BE.8030109@posteo.de> In-Reply-To: <5BCC66BE.8030109@posteo.de> Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: -2.3 (--) 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 all, Has someone ever build (homemade, not bought!) a Rogowski-coil for RF current measurements? https://en.wikipedia.org/wiki/Rogowski_coil It could be used to measure leakage currents in a tower near the antenna wire for example. Or for measuring RF currents into a pole of a guide rail, for example :-) [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.66 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: 5c1f37c04fc013ebbc2288fd3791d043 X-SA-Exim-Scanned: No; SA Timed out after 180 secs 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 all, Has someone ever build (homemade, not bought!) a Rogowski-coil for RF current measurements? https://en.wikipedia.org/wiki/Rogowski_coil It could be used to measure leakage currents in a tower near the antenna wire for example. Or for measuring RF currents into a pole of a guide rail, for example :-) I'm planning to build one and i thought i use 0.4 mm diameter enameled cu wire arround a graden hose, having 0.6m circumference. Then some shrinking tube will be applied. That's the plan. The circuit looks easy, it should be run from a 9V battery and a simple TL081 for example. The output could be adapted to a multimeter, so there is a digital read-out. I'm curious to see how it works... 73, Stefan