Return-Path: X-Spam-DCC: paranoid 1170; 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,UNPARSEABLE_RELAY 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 u9RKQ23v023572 for ; Thu, 27 Oct 2016 22:26:02 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bzrBB-00042J-0i for rs_out_1@blacksheep.org; Thu, 27 Oct 2016 21:21:37 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bzrBA-00042A-JY for rsgb_lf_group@blacksheep.org; Thu, 27 Oct 2016 21:21:36 +0100 Received: from smtp2web.tin.it ([212.216.176.236]) by relay1.thorcom.net with esmtp (Exim 4.87) (envelope-from ) id 1bzrB7-0000sb-KK for rsgb_lf_group@blacksheep.org; Thu, 27 Oct 2016 21:21:35 +0100 Received: from feu3 (10.192.64.13) by smtp2web.tin.it (8.6.060.43) id 54AE98BA0C934CA2 for rsgb_lf_group@blacksheep.org; Thu, 27 Oct 2016 22:21:30 +0200 Received: from (79.21.219.96) by wmlighttin.pc.tim.it; Thu, 27 Oct 2016 22:21:30 +0200 Message-ID: <15807ce0056.marcocadeddu@tin.it> Date: Thu, 27 Oct 2016 22:21:30 +0200 (CEST) From: "marcocadeddu@tin.it" To: Mime-Version: 1.0 X-Originating-IP: 79.21.219.96 X-Scan-Signature: d7907c3bf895ca41e0bedc3fa074f0d4 Subject: R: RE: ULF: A new step on the large ULF coil... Content-Type: text/plain;charset="UTF-8" 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-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by paranoid.lipkowski.org id u9RKQ23v023572 Content-Length: 1912 Status: O X-Status: X-Keywords: X-UID: 9264 Hola Luis, tonight you are booming on 630m wspr! I don't remember if this is the first time I listen to you, but is really a booming signal abeit the distance. Unfortunately bad copy from Stefan (or better optimum if he's running qrp) if the stated power is correct GL Marco IK1HSS ----Messaggio originale---- Da: luis@vigilant.es Data: 27-ott-2016 11.40 A: "rsgb_lf_group@blacksheep.org" Ogg: RE: ULF: A new step on the large ULF coil... Amazing work Stefan !! :-O I bet you have constructed some kind of support (like a lathe) which lets you rotate the pipe easily and wound the coils . Right ? This is getting really heavy and the quality of coils looks very nice and repeteable ...... at least five times ! ;-) Dumb question: Why do you get different inductance values when resonating it with antenna equivalent capacitor and when measuring current at 273V AC / 50Hz ?? Shouldn't be inductance a constant value ? ...... or I'm missing something obvious :( Good luck with the 6th floor. Seems that there is no room for a 7th, so that's why you mentioned the variometer 73 de Luis EA5DOM ________________________________ De: owner-rsgb_lf_group@blacksheep.org [mailto:owner- rsgb_lf_group@blacksheep.org] En nombre de DK7FC Enviado el: miércoles, 26 de octubre de 2016 19:06 Para: rsgb_lf_group@blacksheep.org Asunto: Re: ULF: A new step on the large ULF coil... Hi ULF, It's just a few weeks ago, now the 5th stack is wound on the coil: https://dl.dropboxusercontent.com/u/19882028/ULF/20161026_185804.jpg The DC resistance rose from 445 Ohm to 572 Ohm. The measured resonance frequency (using the antenna equivalent C in the shack) dropped from 3.667 kHz down to 3.208 kHz. That should be about 4.92 H. Measured at 273V AC / 50 Hz, i'm getting 197 mA, so the actual inductance is 4.0 H. A 6th stack and a variometer part is needed! 73, Stefan