Return-Path: Received: from mtain-db10.r1000.mx.aol.com (mtain-db10.r1000.mx.aol.com [172.29.64.94]) by air-mb05.mail.aol.com (v127_r1.1) with ESMTP id MAILINMB053-a5b94b996d1834d; Thu, 11 Mar 2010 17:22:16 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-db10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 640DD3800013D; Thu, 11 Mar 2010 17:22:14 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Npqkg-00020N-9E for rs_out_1@blacksheep.org; Thu, 11 Mar 2010 22:21:10 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Npqkf-00020E-P4 for rsgb_lf_group@blacksheep.org; Thu, 11 Mar 2010 22:21:09 +0000 Received: from cavuit02.kulnet.kuleuven.be ([134.58.240.44]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Npqkd-0007AD-4C for rsgb_lf_group@blacksheep.org; Thu, 11 Mar 2010 22:21:09 +0000 Received: from smtps02.kuleuven.be (smtpshost02.kulnet.kuleuven.be [134.58.240.75]) by cavuit02.kulnet.kuleuven.be (Postfix) with ESMTP id 884A851C004 for ; Thu, 11 Mar 2010 23:20:59 +0100 (CET) Received: from ICTS-S-HUB-N1.luna.kuleuven.be (icts-s-hub-n1.luna.kuleuven.be [10.112.9.11]) by smtps02.kuleuven.be (Postfix) with ESMTP id 494D9F3862 for ; Thu, 11 Mar 2010 23:20:59 +0100 (CET) Received: from ICTS-S-EXC2-CA.luna.kuleuven.be ([10.112.11.13]) by ICTS-S-HUB-N1.luna.kuleuven.be ([10.112.9.11]) with mapi; Thu, 11 Mar 2010 23:20:59 +0100 X-Kuleuven: This mail passed the K.U.Leuven mailcluster From: Rik Strobbe To: "rsgb_lf_group@blacksheep.org" Date: Thu, 11 Mar 2010 23:20:58 +0100 Thread-Topic: DREAM 9 ANTENNA Thread-Index: AcrBOmoo8bsNKHWDSx6BUGGvVTS+bAALRXjY Message-ID: References: <000a01cac139$b9d5e5a0$0401a8c0@xphd97xgq27nyf> In-Reply-To: <000a01cac139$b9d5e5a0$0401a8c0@xphd97xgq27nyf> Accept-Language: nl-NL, nl-BE Content-Language: nl-BE X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: nl-NL, nl-BE MIME-Version: 1.0 X-KULeuven-Information: Katholieke Universiteit Leuven X-KULeuven-Scanned: Found to be clean X-KULeuven-Envelope-From: rik.strobbe@fys.kuleuven.be X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,SUBJ_ALL_CAPS=1.166 Subject: LF: RE: DREAM 9 ANTENNA Content-Type: multipart/alternative; boundary="_000_BF4A524700075746A6467658DFC7102C1288B6B7BFICTSSEXC2CAlu_" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=HTML_40_50,HTML_MESSAGE, SUBJ_ALL_CAPS,TO_ADDRESS_EQ_REAL 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-sid: 3039ac1d405e4b996d166ee0 X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --_000_BF4A524700075746A6467658DFC7102C1288B6B7BFICTSSEXC2CAlu_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable >9 kcs is a lot easier to get going than the other LF/MF bands because the= re is an abundance of LF generators >and high power audio amplifiers about= , Mal, you are right about TX power. 1kW or more would be easily available. But I guess that the TX voltage would become very critical. A "medium size" LF antenna has a typical antenna capacitance of 200 pF, wh= at is a reactance of 90 kOhm. Based on Marcus results the overall loss is in the 1-2kOhm range. Putting a 1kW into 1.5kOhm will result in a current of about 800mA and an= antenna voltage of 74kV. 73, Rik ON7YD --_000_BF4A524700075746A6467658DFC7102C1288B6B7BFICTSSEXC2CAlu_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
>9 kcs is a lot easier= to get going than the other LF/MF bands because there is an abundance of= LF generators >and high power audio amplifiers about,=
 
Mal,
 
you are right about TX power. 1kW or= more would be easily available.
But I guess that the TX voltage would= become very critical.
A "medium size" LF antenna= has a typical antenna capacitance of 200 pF, what is a reactance of 90 kO= hm.
Based on Marcus results the overall= loss is in the 1-2kOhm range.
Putting a 1kW into 1.5kOhm will= result in a current of about 800mA and an antenna voltage of 74kV.=
 
73, Rik  ON7YD
 
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