Return-Path: Received: from mtain-de08.r1000.mx.aol.com (mtain-de08.r1000.mx.aol.com [172.29.64.208]) by air-dd04.mail.aol.com (v127_r1.1) with ESMTP id MAILINDD042-86324ba10d48270; Wed, 17 Mar 2010 13:11:37 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by mtain-de08.r1000.mx.aol.com (Internet Inbound) with ESMTP id D3CD238000160; Wed, 17 Mar 2010 13:11:28 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NrwlD-0000Bs-1X for rs_out_1@blacksheep.org; Wed, 17 Mar 2010 17:10:23 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NrwlC-0000Bi-Jv for rsgb_lf_group@blacksheep.org; Wed, 17 Mar 2010 17:10:22 +0000 Received: from mail-bw0-f228.google.com ([209.85.218.228]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Nrwl9-0005sP-Nq for rsgb_lf_group@blacksheep.org; Wed, 17 Mar 2010 17:10:22 +0000 Received: by bwz28 with SMTP id 28so1520049bwz.34 for ; Wed, 17 Mar 2010 10:10:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=SzPOG8dC3sq43PQDqkljx+06wn46LJk7B1x6xykZtYA=; b=tRAdMgkpD8FTaDHkBYMKp5h1icSA2z1xLZN4N8kFbzwGa1Drtl+sevb8UAjEBPPoU9 FjT7NS3I12fBfM2IftyvVSaiKXci1GDxdX/Us7GHlb44bSPqs7lL3c6v0RCXsJaVOEUe XH0yBU9iblnVwmH7yqh8PN2FJrjQ9UOXkFRsM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=ZDR7XcB+lJBTIJSofRWiy31kigbA3W6xv0S3l4D7bW4StOCRs5XRS3NwDQfyn64/Ey 1E3T6Ndml5SAKVYkgRuC8EU7Q363IYlupFrsRSTm7NkaShvoI07u8Odo0eIOiL5KP9kY mQZ/YVUW5oo6IBbFm8Yoz90R4rKVeEVKMwNMc= MIME-Version: 1.0 Received: by 10.204.145.23 with SMTP id b23mr1527121bkv.17.1268845812648; Wed, 17 Mar 2010 10:10:12 -0700 (PDT) In-Reply-To: <000c01cac5f1$3fac3100$0401a8c0@xphd97xgq27nyf> References: <000c01cac5f1$3fac3100$0401a8c0@xphd97xgq27nyf> Date: Wed, 17 Mar 2010 17:10:12 +0000 Message-ID: <9afca2641003171010o6d43092fl20f121eaaa6a9d50@mail.gmail.com> From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: 9 kcs Content-Type: multipart/alternative; boundary=0015174762e8f00d2b0482022f6f 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-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-d249.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40d04ba10d406d0b X-AOL-IP: 193.82.116.20 X-Mailer: Unknown (No Version) --0015174762e8f00d2b0482022f6f Content-Type: text/plain; charset=ISO-8859-1 Now your really talking Mal. We all hope you go ahead with this. 73s Roger G3XBM On 17 March 2010 16:45, mal hamilton wrote: > 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 spec > 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 horizontal. > The speculators, gamblers and dreamers might be able to guess what distance > 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 > > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/G3XBM G3XBM GQRP 1678 ISWL G11088 --0015174762e8f00d2b0482022f6f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Now your really talking Mal. We all hope you go ahead with this.

73= s
Roger G3XBM

On 17 March 2010 16:45,= mal hamilton <g3kevmal@talktalk.net> wrote:
If I get time and a NOV for 9 kcs my= proposed=20 approach for TX=A0would be an IC 706 on 900 kcs divided by 100/driver chip= TC=20 4427 and a couple of FETS class D for an output of a few hundred watts, de= signed=20 for 50 ohms, 50 ohm coax to antenna 200 feet away from shack as at present= 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. An= tenna=20 height is approx 100 ft vertical and the rest to make up the 1/4 wave=20 is=A0horizontal.
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=A0qrg
=A0
=A0
de mal/g3kev
=A0
=A0



--

http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/G3XBM
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
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