Return-Path: Received: from mtain-mh10.r1000.mx.aol.com (mtain-mh10.r1000.mx.aol.com [172.29.96.222]) by air-de08.mail.aol.com (v127_r1.1) with ESMTP id MAILINDE083-5ec04ba11f92348; Wed, 17 Mar 2010 14:29:38 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-mh10.r1000.mx.aol.com (Internet Inbound) with ESMTP id 52D1F380001AA; Wed, 17 Mar 2010 14:29:31 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Nrxym-0000s2-Sp for rs_out_1@blacksheep.org; Wed, 17 Mar 2010 18:28:28 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Nrxym-0000rt-AQ for rsgb_lf_group@blacksheep.org; Wed, 17 Mar 2010 18:28:28 +0000 Received: from out1.ip07ir2.opaltelecom.net ([62.24.128.243]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Nrxyk-0006NS-KR for rsgb_lf_group@blacksheep.org; Wed, 17 Mar 2010 18:28:28 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgkFABi8oEtOkzAV/2dsb2JhbACMSgOOO3O7FYR2BA X-IronPort-AV: E=Sophos;i="4.51,260,1267401600"; d="scan'208,217";a="443175147" Received: from unknown (HELO xphd97xgq27nyf) ([78.147.48.21]) by out1.ip07ir2.opaltelecom.net with SMTP; 17 Mar 2010 18:28:14 +0000 Message-ID: <002801cac5ff$998dcd60$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: "rsgb" Date: Wed, 17 Mar 2010 18:28:11 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: LF: Fw: 9 kcs Content-Type: multipart/alternative; boundary="----=_NextPart_000_0025_01CAC5FF.99594FE0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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-global-disposition: G x-aol-sid: 3039ac1d60de4ba11f8b650f X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0025_01CAC5FF.99594FE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable ----- Original Message -----=20 From: mal hamilton=20 To: rsgb=20 Sent: Wednesday, March 17, 2010 4:45 PM Subject: 9 kcs If I get time and a NOV for 9 kcs my proposed approach for TX would be= an IC 706 on 900 kcs divided by 100/driver chip TC 4427 and a couple= of FETS class D for an output of a few hundred watts, designed for 50= ohms, 50 ohm coax to antenna 200 feet away from shack as at present= for 137 and 500 kcs. Use the existing 1/4 wave inv L for 500 plus 2 additional ones same sp= ec all in parallel and base loaded by inductor to resonate on 9 kcs,= use existing ground radial system not too elaborate. Antenna height= is approx 100 ft vertical and the rest to make up the 1/4 wave is hor= izontal. The speculators, gamblers and dreamers might be able to guess what dis= tance I might cover. Let me compare your figures !! Assume pwr to be 400 watts at base of antenna. Using 9 kcs figure for convenience, but 8970 kcs would prob be the qrg de mal/g3kev ------=_NextPart_000_0025_01CAC5FF.99594FE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
----- Original Message -----=20
From: mal hamilton=20
To: rsgb
Sent: Wednesday, March 17, 2010 4:45 PM
Subject: 9 kcs

If I get time and a NOV for 9 kcs my= proposed=20 approach for TX would be an IC 706 on 900 kcs divided by 100/driv= er chip TC=20 4427 and a couple of FETS class D for an output of a few hundred watts= , designed=20 for 50 ohms, 50 ohm coax to antenna 200 feet away from shack as at pre= sent for=20 137 and 500 kcs.
Use the existing 1/4 wave inv L for= 500 plus 2=20 additional ones same spec all in parallel and base loaded by inductor= to=20 resonate on 9 kcs, use existing ground radial system not too elaborate= . Antenna=20 height is approx 100 ft vertical and the rest to make up the 1/4 wave= =20 is horizontal.
The speculators, gamblers and dreamer= s might be=20 able to guess what distance I might cover.
Let me compare your figures !!=
Assume pwr to be 400 watts at base of= =20 antenna.
Using 9 kcs figure for convenience,= but 8970 kcs=20 would prob be the qrg
 
 
de mal/g3kev
 
 
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