Return-Path: Received: from mtain-de01.r1000.mx.aol.com (mtain-de01.r1000.mx.aol.com [172.29.64.201]) by air-dc02.mail.aol.com (v128.1) with ESMTP id MAILINDC023-864e4bb53cf21c9; Thu, 01 Apr 2010 20:40:18 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-de01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 98D4538000081; Thu, 1 Apr 2010 20:40:16 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NxUuG-00014C-OR for rs_out_1@blacksheep.org; Fri, 02 Apr 2010 01:38:40 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NxUuG-000143-A1 for rsgb_lf_group@blacksheep.org; Fri, 02 Apr 2010 01:38:40 +0100 Received: from lnx503.hrz.tu-darmstadt.de ([130.83.156.232]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NxUuE-0001hi-GU for rsgb_lf_group@blacksheep.org; Fri, 02 Apr 2010 01:38:40 +0100 Received: from FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de (File-Server-HST.hst.e-technik.tu-darmstadt.de [130.83.212.129]) by lnx503.hrz.tu-darmstadt.de (8.14.2/8.14.2/HRZ/PMX) with SMTP id o320caKA016942 for ; Fri, 2 Apr 2010 02:38:36 +0200 (envelope-from schaefer@hst.tu-darmstadt.de) Received: from [127.0.0.1] (helo=File-Server-HST.hst.e-technik.tu-darmstadt.de) by FILE-SERVER-HST.hst.e-technik.tu-darmstadt.de with AVK MailGateway; for ; Fri, 02 Apr 2010 02:38:36 +0200 Content-class: urn:content-classes:message MIME-Version: 1.0 X-MimeOLE: Produced By Microsoft Exchange V6.5 Date: Fri, 2 Apr 2010 02:38:36 +0200 Message-ID: <38A51B74B884D74083D7950AD0DD85E82A1BBF@File-Server-HST.hst.e-technik.tu-darmstadt.de> X-MS-Has-Attach: X-MS-TNEF-Correlator: <38A51B74B884D74083D7950AD0DD85E82A1BBF@File-Server-HST.hst.e-technik.tu-darmstadt.de> Thread-Topic: 4th VLF experiment by DK7FC/p Thread-Index: AcrR1mvShwr635oISpWIskYmRncGfAAIcCAf References: <001d01cad190$aa92e590$0901a8c0@lark><841031C22EC944FEB2BB3E1DC237717E@acer3f31164f8b> From: =?iso-8859-1?Q?Stefan_Sch=E4fer?= To: X-AVK-Virus-Check: AVB 19.859;01.04.2010 X-PMX-TU: seen v0.99a by 5.5.9.388399, Antispam-Engine: 2.7.2.376379, Antispam-Data: 2010.4.2.2721 X-PMX-SPAMCHECK: outgoing mail X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: multipart/mixed; boundary="----_=_NextPart_001_01CAD1FC.D480AF63" Subject: VLF: 4th VLF experiment by DK7FC/p 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 x-aol-global-disposition: G X-AOL-VSS-INFO: 5400.1158/56983 X-AOL-VSS-CODE: clean x-aol-sid: 3039ac1d40c94bb53cf02e0a X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) ------_=_NextPart_001_01CAD1FC.D480AF63 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Dear group,=20 After a break of one week i plan to transmit again on VLF / 8,97 kHz. If= the wind will be enough i will come up on saturday, 3. April, at arround= 10 UTC. The DFCW-600 mode was a good choice in the last experiment, so i will keep= this mode.=20 If Markus/DF6NM has time to make QSP on the mobile phone to the reflector= (Markus ?) we could arrange various tests. I will also call other local= stations for reception reports during the transmission. There will be some new components to test:=20 Today i started building up the 600W class D PA (at least 600W) that is di= rectly fed out of the 230V (rectified) of the generator. PTT and VFO input= is realised by fiber optic cables. The DC capacitor is 2000=B5F/350V and= can be put on voltage without a NTC or charging resistor due to the relat= ively high output impedance of the small generator (tested). This works ve= ry fine now. Tomorrow i will apply the FETs and the big ferrite core and= it's windings. Then i will do a test on a dummy load at home. If the sign= al will be 3dB stronger, we could theoretically change to DFCW-300 compare= d to the last experiment. But there are many OMs writing private mails to= me and prepare to be QRV on this next test. Some of them are using E-Fiel= d antennas and/or are more than 860km away, that' why i want to stay in QR= SS-600 first. So there might come a new distance record? In any case it wi= ll be exciting to me watching the new system running :-) Also it will be= interesting to see if the E-field antenna will get the signal! The primary winding of the TX coil is increased from 9 to 13 turns due to= the higher power that will be applied. Otherwise the current will become= to high. I will mount the amperemeter (analog, 1A) into the coil. That makes it eas= ier to adjust to resonance and watch the stability and maximum and average= (estimation) current. Finally i will try to apply some copper rods into the earth and will look= how the antenna current is changing. The goal is to radiate 4mW ERP. Another goal is to reach as many stations= as possible. So i would be pleased if YOU would be one of them. :-) Since the QRM/QRN comes up in the late afternoon and transmitting for 4...= 5 hours i will close at about 15 UTC. So the planned LF activity is not af= fected :-). Sorry, but i cannot participate on the LF acty later since the= VLF coil takes all the place in my car ;-) I looking forward to this experiment and wish you good luck and fun by rec= eiving :-) 73 es gl, Stefan/DK7FC PS: Could you give me a short feedback if you plan to be RX? =20 ------_=_NextPart_001_01CAD1FC.D480AF63 Content-Type: application/ms-tnef; name="winmail.dat" Content-Transfer-Encoding: base64 eJ8+IiUAAQaQCAAEAAAAAAABAAEAAQeQBgAIAAAA5AQAAAAAAADoAAEIgAcAGAAAAElQTS5NaWNy b3NvZnQgTWFpbC5Ob3RlADEIAQ2ABAACAAAAAgACAAEEgAEAIwAAAFZMRjogNHRoIFZMRiBleHBl cmltZW50IGJ5IERLN0ZDL3AAxAoBBYADAA4AAADaBwQAAgACACYAJAAFADgBASCAAwAOAAAA2gcE AAIAAgAmACQABQA4AQEJgAEAIQAAADczQ0RDQTM5QTgwMzAwNEY5ODZERjJDMzFCOURFMkI2AE8H AQOQBgC4EQAAOAAAAAMANgAAAAAAQAA5AGOvgNT80coBHgA9AAEAAAAGAAAAVkxGOiAAAAACAUcA AQAAADIAAABjPURFO2E9IDtwPUhTVDtsPUZJTEUtU0VSVkVSLUgtMTAwNDAyMDAzODM2Wi0yNDQz AAAAHgBJAAEAAAAzAAAAUmU6IExGOiBSZTogUmU6IEUtRmllbGQgUHJvYmUgY2FsaWJyYXRpb24g 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