Return-Path: Received: (qmail 2984 invoked from network); 12 Feb 2002 20:49:23 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by exhibition.plus.net with SMTP; 12 Feb 2002 20:49:23 -0000 Received: (qmail 19961 invoked from network); 12 Feb 2002 20:49:16 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 12 Feb 2002 20:49:16 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 16ajpR-0001ol-00 for rsgb_lf_group-outgoing@blacksheep.org; Tue, 12 Feb 2002 20:47:05 +0000 Received: from fep01.swip.net ([130.244.199.129] helo=fep01-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.33 #2) id 16ajpQ-0001og-00 for rsgb_lf_group@blacksheep.org; Tue, 12 Feb 2002 20:47:04 +0000 Received: from oemcomputer ([213.101.40.209]) by fep01-svc.swip.net with SMTP id <20020212204613.BOCG23536.fep01-svc.swip.net@oemcomputer> for ; Tue, 12 Feb 2002 21:46:13 +0100 Message-ID: <00c801c1b406$6927bd20$072565d5@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <3C691C9E.61A8BCA1@netscapeonline.co.uk> Subject: LF: Re: LITZ WIRE Date: Tue, 12 Feb 2002 21:27:09 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 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: Hi All G3KEV wrote: > 2. A loading coil of the same inductance wound with 4mm litz wire > behaves differently. Because of the much higher Q the slightest breeze > or some rain and it needs retuning to resonance, also sudden > fluctuations are not good for the FET pa. This is true only if the ground loss (in ground point R + antenna-to-gnd return R) is very low compared to the coil R. Consider the actual antenna Q which is lower, and often MUCH lower in amateur antennas, than the loading coil Q. 73 Johan SM6LKM