Return-Path: Received: (qmail 12483 invoked from network); 5 May 2001 19:19:41 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 5 May 2001 19:19:41 -0000 Received: (qmail 14146 invoked from network); 5 May 2001 19:19:11 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 5 May 2001 19:19:11 -0000 X-Priority: 3 Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 14w7Vq-0002ar-00 for rsgb_lf_group-outgoing@blacksheep.org; Sat, 05 May 2001 20:14:42 +0100 X-MSMail-Priority: Normal Received: from finch-post-11.mail.demon.net ([194.217.242.39]) by post.thorcom.com with esmtp (Exim 3.16 #2) id 14w7Vp-0002am-00 for rsgb_lf_group@blacksheep.org; Sat, 05 May 2001 20:14:41 +0100 Received: from alg.demon.co.uk ([194.222.171.80]) by finch-post-11.mail.demon.net with esmtp (Exim 2.12 #1) id 14w7VJ-000Nl2-0B for rsgb_lf_group@blacksheep.org; Sat, 5 May 2001 19:14:09 +0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <3AF451F4.A09A7438@alg.demon.co.uk> Date: Sat, 05 May 2001 20:18:12 +0100 From: "Steve Rawlings" X-Mailer: Mozilla 4.6 [en-gb]C-CCK-MCD NetscapeOnline.co.uk (Win98; I) X-Accept-Language: en-GB,en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: Coupling between two antennas References: <001201c0d58d$5801ec80$c48801d4@g4jnt> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Andy G4JNT wrote: > 8V p-p in 50 ohms is 0.16W, not 60mW > > So you have 34dB coupling - you were right to expect more than 40dB ! That's more like it! (I think my conversion to rms went wrong.) I'll use the formula below in future. (Epk)^2 Power = ------- 2 R Many thanks Andy. By the way, the QRN (static) on 136 kHz has been high here in Chepstow for a couple of days, and is currently peaking S9. But I did manage QSOs earlier today with F6CNI (RST 569), G8RW (469), and G3OLB (599). I also heard PA0SE (569). Regards to all, Steve GW4ALG