Return-Path: Received: (qmail 24517 invoked from network); 31 Mar 2000 19:27:24 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by grants.core.plus.net.uk with SMTP; 31 Mar 2000 19:27:24 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12b6xu-0007wr-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 31 Mar 2000 20:20:18 +0100 Received: from cmailg1.svr.pol.co.uk ([195.92.195.171]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12b6xo-0007wL-00 for rsgb_lf_group@blacksheep.org; Fri, 31 Mar 2000 20:20:13 +0100 Received: from modem-23.jewel-puffer.dialup.pol.co.uk ([62.137.33.23] helo=lvm) by cmailg1.svr.pol.co.uk with smtp (Exim 3.13 #0) id 12b6xZ-0005g9-00 for rsgb_lf_group@blacksheep.org; Fri, 31 Mar 2000 20:20:00 +0100 Message-ID: <000201bf9b46$31730220$1721893e@lvm> From: "LAWRENCE MAYHEAD" To: "rsgb lf group" Subject: LF: Re. Decca TX. Date: Fri, 31 Mar 2000 20:16:34 +0100 MIME-Version: 1.0 Content-Type: text/html; charset=windows-1252 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Content-transfer-encoding: 8bit

Thanks again for various comments.

1) Amp-Metres this is of course understood,but it is not significant since the currents will be adjusted to obtain equal powers in the two ants.

2)Dave ZL3FJ is concerned about co-siting and mutual coupling.I agree but it should be possible to de-tune the big ant. and so long as they are not too close I dont think the mutual will be very significant.However the two ants. could be on separate sites since even the professional ground is not likely to be all that good.

3) Mike G3XDV states that with practical levels of ground loss the lowest angles of radiation are attenuated more on very short verticals than on long ones,OK but 300Ft is still a very short vertical (it would need to be more than 500M long! to be quarter wavelength) So I doubt if there will be ang great difference between 300 and 60 feet from this cause.

So I still think this a worthwile experiment. Laurie G3AQC.