Return-Path: Received: (qmail 5563 invoked from network); 24 Feb 1999 18:51:30 -0000 Received: from magnet.plus.net.uk (HELO magnet.force9.net) (195.166.128.26) by medusa.plus.net.uk with SMTP; 24 Feb 1999 18:51:30 -0000 Received: (qmail 3191 invoked from network); 24 Feb 1999 18:52:37 -0000 Received: from post.thorcom.com (194.75.130.70) by magnet.plus.net.uk with SMTP; 24 Feb 1999 18:52:37 -0000 Received: from troy.blacksheep.org ([194.75.183.50] ident=root) by post.thorcom.com with esmtp (Exim 2.04 #3) id 10FjQm-0000kV-00; Wed, 24 Feb 1999 18:53:12 +0000 Received: (from root@localhost) by troy.blacksheep.org (8.6.12/8.6.12) id SAA21934 for rsgb_lf_group-outgoing; Wed, 24 Feb 1999 18:49:11 GMT Received: from post.thorcom.com (root@post.unica.co.uk [194.75.183.70]) by troy.blacksheep.org (8.6.12/8.6.12) with ESMTP id SAA21737 for ; Wed, 24 Feb 1999 18:42:31 GMT Received: from cask.force9.net ([195.166.128.29]) by post.thorcom.com with smtp (Exim 2.04 #3) id 10FjJT-0000OE-00 for rsgb_lf_group@blacksheep.org; Wed, 24 Feb 1999 18:45:39 +0000 Received: (qmail 18839 invoked from network); 24 Feb 1999 18:44:53 -0000 Received: from relay2.force9.net (195.166.128.25) by cask.force9.net with SMTP; 24 Feb 1999 18:44:53 -0000 Received: (qmail 31102 invoked from network); 24 Feb 1999 18:28:55 -0000 Received: from 32.usr01.wor.dialup.force9.net (HELO main) (195.166.131.32) by relay2.force9.net with SMTP; 24 Feb 1999 18:28:55 -0000 Message-ID: <002201be6022$05ab0080$0600a8c0@main> From: "Pick" To: rsgb_lf_group@blacksheep.org Subject: Re: LF: PSK31 Date: Wed, 24 Feb 1999 18:17:59 -0000 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 4.72.3110.1 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org Andy et al >Is that 6dB down on mean power ? As PSK31 has a peak to mean ratio of >exactly 3dB I suspect the extra power reduction is to get the transmitter >into a suitable linear region. > It's a different TX, a PA strip from the transverter output of the IC735 which I have modified to give an output down there. The PA is a hybrid of David's design and my topband FET linear with a pair of IXFH75N10 at 24V. It produces 250W key-down (PEP) and obviously shows less average when sending PSK31 due to the holes in it! Do you intend to use BPSK or QPSK? Any other parameters I should set? I have copied several stations on 80 so the RX works OK. I will put out some calls down the bottom of the band, about 136.2, at around 8pm for the rest of the week. I will listen co-channel. Any reports gratefully received. 73, Dave G3YXM.