Return-Path: Received: (qmail 3664 invoked from network); 3 May 2000 09:24:33 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by teachers.core.plus.net.uk with SMTP; 3 May 2000 09:24:33 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12mvIL-00065H-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 03 May 2000 10:18:13 +0100 Received: from ns0.to.cnr.it ([150.145.32.10] helo=ccs0.to.cnr.it) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12mvIH-00065B-00 for rsgb_lf_group@blacksheep.org; Wed, 03 May 2000 10:18:10 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from aldo (aldo.to.cnr.it [150.145.34.49]) by ccs0.to.cnr.it with SMTP (Microsoft Exchange Internet Mail Service Version 5.5.2650.21) id JJK9QTSN; Wed, 3 May 2000 11:17:46 +0200 From: "Aldo Marchetto" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Organization: CNR To: rsgb_lf_group@blacksheep.org Date: Wed, 3 May 2000 11:17:03 +1 MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit Subject: LF: beacon power control (was Re: LF: IK1ODO beacon signal) In-reply-to: <3.0.1.16.20000503100301.2e77a8b0@mail.cc.kuleuven.ac.be> References: <4.1.20000502224757.020c4040@mailer.inrete.it> Message-ID: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Hello Rik and Marco, as Rick is thinking to write a software for controlling a step attenuator, I think it would be possible to link that software to a digital reading of antenna current, so that the attenuator itself would lead the power constant at +/- 0.5 dB with 1 dB steps This sounds simpler than building a new transmitter. This would also mean that a relevant part of Marco's power (maybe increased to some extent) would be always dissipated in the attenuator, increasing PA safety in case of antenna detuning, On the contrary a very accurate PA proctection would be required if a POSITIVE feedback to the antenna current meter has to be connected to an unattended TX. 73 Aldo IZ1ANT Dr. Aldo Marchetto C.N.R. Istituto Italiano di Idrobiologia Largo Vittorio Tonolli 50 I-28922 Verbania Pallanza (VB) - Italy Voice: +39 0323 518357 Fax: +39 0323 556513 E-mail: a.marchetto@iii.to.cnr.it http: www.iii.to.cnr.it