Return-Path: Received: from rly-md07.mx.aol.com (rly-md07.mail.aol.com [172.20.29.145]) by air-md03.mail.aol.com (v121_r2.12) with ESMTP id MAILINMD031-91548e9e495316; Mon, 06 Oct 2008 06:12:58 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md07.mx.aol.com (v121_r2.11) with ESMTP id MAILRELAYINMD075-91548e9e495316; Mon, 06 Oct 2008 06:12:41 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Kmn4b-0007q1-5d for rs_out_1@blacksheep.org; Mon, 06 Oct 2008 11:12:17 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Kmn4a-0007ps-OW for rsgb_lf_group@blacksheep.org; Mon, 06 Oct 2008 11:12:16 +0100 Received: from smtp805.mail.ird.yahoo.com ([217.146.188.65]) by relay1.thorcom.net with smtp (Exim 4.63) (envelope-from ) id 1Kmn4Z-0003NV-Q1 for rsgb_lf_group@blacksheep.org; Mon, 06 Oct 2008 11:12:16 +0100 Received: (qmail 3864 invoked from network); 6 Oct 2008 10:12:09 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=btinternet.com; h=Received:X-YMail-OSG:X-Yahoo-Newman-Property:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE; b=WotT9dWd3G/2mBF9zJi1p0R9WrhdM/fFVBG15rKNLy9rsqkGaqQ1mDiEYmHudILyfuMIo1kU4eNTSDmcpzw6Ov06LuNotxGcbRc/OSRZYLqG5lIWjynkKB0CkaA9F+vMJnzjV78iBOpne4PIrPZeXPWmxjUxfkAfM29XeAb3M4o= ; Received: from unknown (HELO fred) (c.ashby435@81.152.136.145 with login) by smtp805.mail.ird.yahoo.com with SMTP; 6 Oct 2008 10:12:09 -0000 X-YMail-OSG: 7F39lS8VM1nYxVoXWQElWqnZ.0e8NL9Ri_Qd36dv_m0WNpoC26JgTZXEs4e1mIs7Kc9qkL4C6l.BBcotd7tT0iE5sdNWU8HqrupKUVjeGk4v1xN7VGwy9U5bed9XV5rWs8NMBt4OAyaPkgHeEqChjJA6NNHG X-Yahoo-Newman-Property: ymail-3 Message-ID: <005901c9279c$1921d980$0201a8c0@home> From: "Chris" To: "RSGB lf Group" Date: Mon, 6 Oct 2008 11:12:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Karma: 0: DomainKey-Status: good (testing) X-Spam-Score: 2.0 (++) X-Spam-Report: autolearn=disabled,DNS_FROM_SECURITYSAGE=2.001,HTML_MESSAGE=0.001 Subject: LF: ATU Content-Type: multipart/alternative; boundary="----=_NextPart_000_0056_01C927A4.7A36C7A0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.3 required=5.0 tests=FROM_ENDS_IN_NUMS,HTML_20_30, HTML_MESSAGE 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: domain : post.thorcom.com ; SPF_helo = n X-AOL-SCOLL-AUTHENTICATION: domain : btinternet.com ; SPF_822_from = n ------=_NextPart_000_0056_01C927A4.7A36C7A0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hello Tim, My ATU is really a large matching coil. It consists of 130 turns of insulate= d solid copper wire on an 11.5cm dia. cardboard former (carpet roll centre)=20= tapped every ten turns (course tuning) in series with a coil of 22 turns of=20= 18 swg enam. copper wire, 7cm long, 6cm dia. and tapped every two turns (fin= e tuning). I find this will resonate my 124' wire from Medium Wave, through=20= 500kHz, to all the NDBs. I built this so I could use it for TX one day. If you are going for RX only,= take a look at 'LF Today', second edition, p14 and 15. This is my next proj= ect, got all the parts, building this week. All the best. Vy 73, Chris, G4AYT, Whitstable, Kent. ------=_NextPart_000_0056_01C927A4.7A36C7A0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hello Tim,
My ATU is really a large matching coil. It=20= consists=20 of 130 turns of insulated solid copper wire on an 11.5cm dia. cardboard form= er=20 (carpet roll centre) tapped every ten turns (course tuning) in series with a= =20 coil of 22 turns of 18 swg enam. copper wire, 7cm long, 6cm dia. and tapped=20 every two turns (fine tuning). I find this will resonate my 124' wire from=20 Medium Wave, through 500kHz, to all the NDBs.
I built this so I could use it for TX one d= ay. If=20 you are going for RX only, take a look at 'LF Today', second edition, p14 an= d=20 15. This is my next project, got all the parts, building this week.
All the best.
Vy 73,
Chris, G4AYT, Whitstable,=20 Kent.
------=_NextPart_000_0056_01C927A4.7A36C7A0--