Return-Path: Received: from mtain-ma11.r1000.mx.aol.com (mtain-ma11.r1000.mx.aol.com [172.29.96.19]) by air-de02.mail.aol.com (v127_r1.1) with ESMTP id MAILINDE024-5ea94ba107ad2ec; Wed, 17 Mar 2010 12:47:41 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-ma11.r1000.mx.aol.com (Internet Inbound) with ESMTP id 3A6CD38000098; Wed, 17 Mar 2010 12:47:38 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NrwNJ-0008MY-DH for rs_out_1@blacksheep.org; Wed, 17 Mar 2010 16:45:41 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NrwNJ-0008MP-0e for rsgb_lf_group@blacksheep.org; Wed, 17 Mar 2010 16:45:41 +0000 Received: from out1.ip03ir2.opaltelecom.net ([62.24.128.239]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NrwNG-0005hr-1X for rsgb_lf_group@blacksheep.org; Wed, 17 Mar 2010 16:45:40 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AgkFAGKkoEtOkzAV/2dsb2JhbACMSgOOO3O6XIR2BA X-IronPort-AV: E=Sophos;i="4.49,658,1262563200"; d="scan'208,217";a="300523783" Received: from unknown (HELO xphd97xgq27nyf) ([78.147.48.21]) by out1.ip03ir2.opaltelecom.net with SMTP; 17 Mar 2010 16:45:30 +0000 Message-ID: <000c01cac5f1$3fac3100$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: "rsgb" Date: Wed, 17 Mar 2010 16:45:27 -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: 9 kcs Content-Type: multipart/alternative; boundary="----=_NextPart_000_0009_01CAC5F1.3F26AD50" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=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-global-disposition: G x-aol-sid: 3039ac1d60134ba107aa0408 X-AOL-IP: 193.82.116.20 ------=_NextPart_000_0009_01CAC5F1.3F26AD50 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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 =20 de mal/g3kev =20 =20 ------=_NextPart_000_0009_01CAC5F1.3F26AD50 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

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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