Return-Path: Received: from rly-dd05.mx.aol.com (rly-dd05.mail.aol.com [172.19.141.152]) by air-dd02.mail.aol.com (v121_r3.13) with ESMTP id MAILINDD024-b7a48ea4450196; Mon, 06 Oct 2008 13:01:55 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-dd05.mx.aol.com (v121_r3.13) with ESMTP id MAILRELAYINDD054-b7a48ea4450196; Mon, 06 Oct 2008 13:01:07 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1KmtRV-0000GW-NM for rs_out_1@blacksheep.org; Mon, 06 Oct 2008 18:00:21 +0100 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1KmtRU-0000GM-TL for rsgb_lf_group@blacksheep.org; Mon, 06 Oct 2008 18:00:20 +0100 Received: from smtp5.freeserve.com ([193.252.22.151] helo=smtp6.freeserve.com) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1KmtRT-0001nR-6X for rsgb_lf_group@blacksheep.org; Mon, 06 Oct 2008 18:00:20 +0100 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf3517.me.freeserve.com (SMTP Server) with ESMTP id 9FF021C00085 for ; Mon, 6 Oct 2008 19:00:09 +0200 (CEST) Received: from AGB (unknown [91.110.77.27]) by mwinf3517.me.freeserve.com (SMTP Server) with SMTP id 615961C00083 for ; Mon, 6 Oct 2008 19:00:09 +0200 (CEST) X-ME-UUID: 20081006170009398.615961C00083@mwinf3517.me.freeserve.com Message-ID: <065D6E9F40984306A9A336C849B364BB@AGB> From: "Graham" To: References: <005901c9279c$1921d980$0201a8c0@home> In-Reply-To: <005901c9279c$1921d980$0201a8c0@home> Date: Mon, 6 Oct 2008 18:00:08 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.5027.908 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.5027.908 X-Spam-Score: 2.0 (++) X-Spam-Report: autolearn=disabled,DNS_FROM_SECURITYSAGE=2.001,HTML_MESSAGE=0.001 Subject: Re: LF: ATU Content-Type: multipart/alternative; boundary="----=_NextPart_000_004C_01C927DD.5EE63290" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.9 required=5.0 tests=HTML_30_40,HTML_MESSAGE, MISSING_OUTLOOK_NAME 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 : g8fzk.fsnet.co.uk ; SPF_822_from = n ------=_NextPart_000_004C_01C927DD.5EE63290 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Simple tuner=20 If it works on top band, then it will work on 500 (with a bit more C) .. thi= s is a simple parallel tuner , with a WW2 ex usa surplus transmitter coil,=20= and a 2000 pf capacitor 4 x 250pf wired in parallel , Worked well on rx an= d would handle up to 25 watts on tx before the plates flashed over ! but ea= sy to make easy to tune , rx/tx tapped 2 turns from the bottom and the Ae=20= direct to the top (the knob is from the B set .. ws19)=20 http://uk500khz.googlegroups.com/web/Parallel+ATU?gda=3DAekYBT4AAAD_AR9CZEwm= TaUFcglf9MHbexqv2sBQZsAxVg3n14BVSpRSVTbPEv7Iv69fZDO_RFvjsKXVs-X7bdXZc5buSfmx G ..=20 From: Chris=20 Sent: Monday, October 06, 2008 11:12 AM To: RSGB lf Group=20 Subject: LF: ATU 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. ----------------------------------------------------------------------------= ---- No virus found in this incoming message. Checked by AVG - http://www.avg.com=20 Version: 8.0.173 / Virus Database: 270.7.6/1709 - Release Date: 10/5/2008 09= :20 ------=_NextPart_000_004C_01C927DD.5EE63290 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Simple tuner
 
If it works on top band, then it will work=20= on 500=20 (with a bit more C) .. this is a simple parallel tuner , with a WW2  ex= usa=20 surplus transmitter coil, and a  2000 pf capacitor 4 x 250pf  wire= d in=20 parallel , Worked well on rx and would handle up to  25 watts on tx bef= ore=20 the plates flashed over ! but easy to  make easy to tune , rx/tx tapped= 2=20 turns from the bottom and the  Ae direct to  the top (the knob is=20= from=20 the B set .. ws19)
 
 
G ..
 
 

From: Chris
Sent: Monday, October 06, 2008 11:12 AM
Subject: LF: ATU

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, Kent.


No virus found in this incoming message.
Checked by AVG -=20 http://www.avg.com
Version: 8.0.173 / Virus Database: 270.7.6/1709 - Rel= ease=20 Date: 10/5/2008 09:20
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