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[195.171.43.25]) by mx.google.com with ESMTP id z5si4042779wjz.6.2013.12.15.14.16.36 for ; Sun, 15 Dec 2013 14:16:36 -0800 (PST) Received-SPF: neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) client-ip=195.171.43.25; Authentication-Results: mx.google.com; spf=neutral (google.com: 195.171.43.25 is neither permitted nor denied by best guess record for domain of owner-rsgb_lf_group@blacksheep.org) smtp.mail=owner-rsgb_lf_group@blacksheep.org Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1VsJDP-00047s-Nq for rs_out_1@blacksheep.org; Sun, 15 Dec 2013 21:27:07 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1VsJDP-00047i-61 for rsgb_lf_group@blacksheep.org; Sun, 15 Dec 2013 21:27:07 +0000 Received: from blu0-omc1-s18.blu0.hotmail.com ([65.55.116.29]) by relay1.thorcom.net with esmtp (Exim 4.77) (envelope-from ) id 1VsJDM-0008B6-Hn for rsgb_lf_group@blacksheep.org; Sun, 15 Dec 2013 21:27:06 +0000 Received: from BLU404-EAS74 ([65.55.116.7]) by blu0-omc1-s18.blu0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Sun, 15 Dec 2013 13:27:03 -0800 X-TMN: [cb8BWPE+u7oFNXpvonUpJh9WpVB1rnAQ] X-Originating-Email: [hellozerohellozero@hotmail.com] Message-ID: References: <52ACA468.8070907@gmx.de> <00a101cef8fe$a1854350$6402a8c0@pa3fnyb8313412> <52ACB684.4040709@iup.uni-heidelberg.de> <52AD2C90.4070101@iup.uni-heidelberg.de> <52ADD9C8.2000700@iup.uni-heidelberg.de> <002c01cef9d1$8611d600$6401a8c0@JAYDELL> <52AE0E53.60506@iup.uni-heidelberg.de> From: Laurence KL7 L In-Reply-To: <52AE0E53.60506@iup.uni-heidelberg.de> Date: Sun, 15 Dec 2013 11:27:02 -1000 To: "rsgb_lf_group@blacksheep.org" MIME-Version: 1.0 (1.0) X-OriginalArrivalTime: 15 Dec 2013 21:27:03.0299 (UTC) FILETIME=[65994D30:01CEF9DC] X-Spam-Score: -0.5 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has identified this incoming email as possible spam. The original message has been attached to this so you can view it (if it isn't spam) or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Is this the same coil as used for the kites stefan? Laurence in KH6 Lightning storm 29C > On Dec 15, 2013, at 10:19 AM, "Stefan Schäfer" wrote: > > Hi Jay, > > Am 15.12.2013 21:09, schrieb jrusgrove@comcast.net: >> Stefan >> >> What is the overall antenna R now? > On VLF? Well, i'm getting 850 mA at 400W, i.e. 550 Ohm. If i remember correctly, the coil has 320 Ohm, so the sourrounding losses are 230 Ohm. > >> With the kite of years gone by? > Who knows. At least there are no concrete plans in the moment. But it would be nice :-) > The fixed antenna has some real advantages. But i will never generate a signal in the range of 58 mW ERP with that one.. >> >> Miss reading and seeing the pictures of your escapades in the field. > :-) > > 73, Stefan > > >> >> Jay W1VD WD2XNS WE2XGR/2 WG2XRS/2 >> >> >> ----- Original Message ----- From: "Stefan Schäfer" >> To: ; "Paul" >> Sent: Sunday, December 15, 2013 11:33 AM >> Subject: Re: LF: A short VLF experiment at DK7FC >> >> >> Hi Peter, VLF, >> >> Did you see a trace on your grabber? Can you show me a link or a screenshot? >> The signal is well visible on Paul Nicholson's excellent VLF grabber, >> http://abelian.org/vlf/fbins.shtml#p=1387116000&b=110&s=sp but far from >> stable. Is instability is due to my signal of course. Distance to Paul >> is 880 km, http://no.nonsense.ee/qth/map.html?qth=IO83XQ&from=jn49ik00wd >> >> You are right, there are many things to optimise. One thing is the >> housing of the PA. Now it is just mounted on a wooden plate. It is a H >> bridge using 4x IRFP460, switching directly at 230V*1.41, so the output >> of the PA is on mains potential! There is no galvanic decoupling >> transformer on the output (which would allow to use a grounded coax >> then) because such a transformer would have to be a VERY big ferrite >> core with many many turns (> 100). So the PA output is directly >> connected to the primary winding of the loading coil, which couples its >> field into the resonance winding (1200 [...] Content analysis details: (-0.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [65.55.116.29 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (hellozerohellozero[at]hotmail.com) -0.0 SPF_PASS SPF: sender matches SPF record -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain X-Scan-Signature: bde53fa3678f346afe39dd99e3e185db Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Subject: Re: LF: A short VLF experiment at DK7FC 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=FORGED_HOTMAIL_RCVD, 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