Return-Path: Received: from rly-da10.mx.aol.com (rly-da10.mail.aol.com [172.19.129.84]) by air-da08.mail.aol.com (v123.4) with ESMTP id MAILINDA083-a9549d4e8b43b9; Thu, 02 Apr 2009 12:33:34 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da10.mx.aol.com (v123.4) with ESMTP id MAILRELAYINDA105-a9549d4e8b43b9; Thu, 02 Apr 2009 12:32:54 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1LpPpb-00026H-4a for rs_out_1@blacksheep.org; Thu, 02 Apr 2009 17:31:55 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1LpPpa-000268-Mw for rsgb_lf_group@blacksheep.org; Thu, 02 Apr 2009 17:31:54 +0100 Received: from vms173001pub.verizon.net ([206.46.173.1]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1LpPpX-0007vg-Tt for rsgb_lf_group@blacksheep.org; Thu, 02 Apr 2009 17:31:54 +0100 Received: from DR2 ([71.184.212.10]) by vms173001.mailsrvcs.net (Sun Java(tm) System Messaging Server 6.3-7.04 (built Sep 26 2008; 32bit)) with ESMTPA id <0KHH000X9F8JGMY3@vms173001.mailsrvcs.net> for rsgb_lf_group@blacksheep.org; Thu, 02 Apr 2009 11:31:32 -0500 (CDT) Message-id: From: "dave.riley3" To: References: <20090402074911.6B552F3866@smtps02.kuleuven.be> <1LpKtN-16pRzc0@fwd02.t-online.de> <20090402124918.EBC0B31E703@smtps01.kuleuven.be> Date: Thu, 02 Apr 2009 12:31:30 -0400 MIME-version: 1.0 X-Priority: 3 X-MSMail-priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 X-Karma: unknown: X-Spam-Score: 3.4 (+++) X-Spam-Report: autolearn=disabled,FORGED_MUA_OUTLOOK=3.36,HTML_MESSAGE=0.001 Subject: Re: LF: Tune and match the ant for 50kHz...550kHz Content-type: multipart/alternative; boundary="----=_NextPart_000_003D_01C9B38E.F37F3D60" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.1 required=5.0 tests=FORGED_MUA_OUTLOOK,HTML_40_50, 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 ------=_NextPart_000_003D_01C9B38E.F37F3D60 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable You can use a simple vertical LOOP made from one piece of HEAVY, well insula= ted wire and one vacuum variable capacitor... Advantages: No need of many wires dug into the ground to lose power No hoisting many top load wires and associated rigging No lossy loading coils and messy matching networks No retuning when the weather changes No high voltages to start fires No 'E' noises in LOOP antenna Simple tuning with one capacitor from 17khz. to 50 mhz. ( I use auto tuner when connected to HF rig ) Simple Toroid transformer makes for easy, balanced coupling It's all I use from VLF to 6 Meters, the results speak for themselves, DX on= HF too Works much better than any wire antenna I have tried so far, vertical or hor= izontal Very poor ground conductivity here is best for a loop ( approaches free spac= e condition ) Disadvantages: Marconi vertical is WAYYY too noisey here, I took it down... None noted since happy changeover, thanks to much work and forethought by Bi= ll Ashlock WE2XGR/4 Next improvement is to parallel 2nd tuned parasitic loop in close proximity=20= to lower effective 'R' and up the 'Q' www.radiocom.net/600M/LOOP109.jpg =20 TNX Dave @ WD2XSH/17 ------=_NextPart_000_003D_01C9B38E.F37F3D60 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
You can use a simple vertical LOO= P made=20 from one piece of HEAVY, well insulated wire and one vacuum variable=20 capacitor...
 
Advantages:
 
No need of many wires dug into th= e ground=20 to lose power
No hoisting many top load wires a= nd=20 associated rigging
No lossy loading coils and messy=20= matching=20 networks
No retuning when the weather=20 changes
No high voltages to start=20 fires
No 'E' noises in LOOP=20 antenna
Simple tuning with one capacitor=20= from=20 17khz. to 50 mhz.
( I use auto tuner when connected= to HF=20 rig )
Simple Toroid transformer makes f= or easy,=20 balanced coupling
It's all I use from VLF to 6 Mete= rs, the=20 results speak for themselves, DX on HF too
Works much better than any wire a= ntenna I=20 have tried so far, vertical or horizontal
Very poor ground conductivity her= e is=20 best for a loop ( approaches free space condition )
 
Disadvantages:
 
Marconi vertical is WAYYY too noi= sey=20 here, I took it down...
 
None noted since happy chan= geover,=20 thanks to much work and forethought by Bill Ashlock=20 WE2XGR/4
 
Next improvement is to parallel=20 2nd tuned parasitic loop in close proximity to lower effective 'R' and=20= up=20 the 'Q'
 
 
TNX   Dave @=20 WD2XSH/17
 
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