Return-Path: Received: (qmail 21387 invoked from network); 26 Nov 2001 20:11:22 -0000 Received: from unknown (HELO warrior.services.quay.plus.net) (212.159.14.227) by excalibur.plus.net with SMTP; 26 Nov 2001 20:11:22 -0000 Received: (qmail 5529 invoked from network); 26 Nov 2001 20:11:14 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by warrior.services.quay.plus.net with SMTP; 26 Nov 2001 20:11:14 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.33 #2) id 168S2T-0001KU-00 for rsgb_lf_group-outgoing@blacksheep.org; Mon, 26 Nov 2001 20:07:37 +0000 Received: from fep04.swip.net ([130.244.199.132] helo=fep04-svc.swip.net) by post.thorcom.com with esmtp (Exim 3.33 #2) id 168S2S-0001KP-00 for rsgb_lf_group@blacksheep.org; Mon, 26 Nov 2001 20:07:36 +0000 Received: from oemcomputer ([212.151.11.166]) by fep04-svc.swip.net with SMTP id <20011126200652.DPBI14033.fep04-svc.swip.net@oemcomputer> for ; Mon, 26 Nov 2001 21:06:52 +0100 Message-ID: <014f01c176b5$eb203840$a60b97d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <003d01c17534$11193b60$eb0d97d4@oemcomputer> <1682Ng-1zLXA8C@fwd07.sul.t-online.com> <5.0.2.1.2.20011125225307.00a2bb90@mail.pncl.co.uk> <5.0.2.1.2.20011126094422.00a46b50@mail.pncl.co.uk> Subject: Re: LF: 80m QRSS QRPppp QRT Date: Mon, 26 Nov 2001 20:23:04 +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: Walter, > Interesting! Is that RADIATED power or DC input? It is output power. The beacon TX feeds 1mW into the coax. The output voltage from the signal generator is 1Vp-p and there is a -4dB attenuator between the generator and the antenna feedline. The antenna is a dipole at about 8m height with approx. 20m RG58 feedline. The antenna appears to be well matched at this frequency, close to 50+j0 ohms at the TX end of the coax. The actual radiated power is less than 1mW due to the well known "garden loss" (although I doubt that this beacon will heat the soil enough to make the carrots grow faster and bigger :-) > My 0.5 mW (radiated) on 136 kHz has only made 300 kms so far. > (1W RF into antenna coil) The atmospheric noise level is MUCH worse on 136kHz. 73 Johan SM6LKM