From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 72801 invoked from network); 30 Apr 2004 23:51:48 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 30 Apr 2004 23:51:48 -0000 Received: (qmail 29551 invoked from network); 30 Apr 2004 23:51:48 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 30 Apr 2004 23:51:47 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BJhnH-0007Yy-2F for dave@picks.force9.co.uk; Fri, 30 Apr 2004 23:51:47 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BJhmg-0007Vb-CI for rs_out_1@blacksheep.org; Sat, 01 May 2004 00:51:10 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BJhmf-0007VR-QG for rsgb_lf_group@blacksheep.org; Sat, 01 May 2004 00:51:09 +0100 Received: from mxsf17.cluster1.charter.net ([209.225.28.217]) by relay.salmark.net with esmtp (Exim 4.24) id 1BJhmc-0004AO-RA for rsgb_lf_group@blacksheep.org; Sat, 01 May 2004 00:51:06 +0100 X-Fake-Domain: johncellarnew Received: from johncellarnew (cpe-68-118-232-30.ma.charter.com [68.118.232.30]) by mxsf17.cluster1.charter.net (8.12.11/8.12.11) with SMTP id i3UNoIYK032451 for ; Fri, 30 Apr 2004 19:50:18 -0400 (EDT) Message-ID: <001501c42f0d$e5437460$0500a8c0@charter.net> From: "John Andrews" To: rsgb_lf_group@blacksheep.org References: <001001c42e4f$d98ff1c0$0500a8c0@charter.net> <796452468.20040430173851@t-online.de> Date: Sat, 1 May 2004 00:50:18 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Spam-Score: 0.1 (/) X-Spam-Report: RCVD_IN_SORBS=0.1 Subject: Re: LF: WD2XES 30 Apr Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Hartmut, > Poor conditions here at my side. Copied only "ES" around 0215z. Saw > VO1NA much stronger in the past weeks than last night. There was a propagation peak to Brian around 0100, but copy dropped off after that. Thanks for the try. John Andrews From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 94503 invoked from network); 3 May 2004 11:43:19 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 3 May 2004 11:43:19 -0000 Received: (qmail 130 invoked from network); 3 May 2004 11:43:18 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 3 May 2004 11:43:16 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BKbqu-000Pf7-9r for dave@picks.force9.co.uk; Mon, 03 May 2004 11:43:16 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BKbpL-0001wX-6f for rs_out_1@blacksheep.org; Mon, 03 May 2004 12:41:39 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BKbpK-0001wO-5E for rsgb_lf_group@blacksheep.org; Mon, 03 May 2004 12:41:38 +0100 X-No-DNS-For: 80.68.4.13 Received: from [80.68.4.13] (helo=relay.dx.ru) by relay.salmark.net with smtp (Exim 4.24) id 1BKbpH-0000yp-70 for rsgb_lf_group@blacksheep.org; Mon, 03 May 2004 12:41:35 +0100 Received: (qmail 18306 invoked from network); 3 May 2004 15:41:27 +0400 X-Fake-Domain: ed.dx Received: from ed.dx (10.0.1.11) by 80.68.4.13 with SMTP; 3 May 2004 15:41:27 +0400 Date: Mon, 3 May 2004 15:40:55 +0400 From: Ed Lesnichy X-Suspect-Bulk-Mailer: The Bat! X-Mailer: The Bat! (v1.60q) Personal Organization: Ed Lesnichy X-Priority: 3 (Normal) Message-ID: <6813222948.20040503154055@dx.ru> To: rsgb_lf_group@blacksheep.org In-Reply-To: <796452468.20040430173851@t-online.de> References: <001001c42e4f$d98ff1c0$0500a8c0@charter.net> <796452468.20040430173851@t-online.de> MIME-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Spacesounds Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dear LF-enthusiasts! See http://www.spacesounds.com/home/index.html On a www there are very interesting sounds. Some of them are very similar to sounds on LF ;-) 73! Ed RU6LA ed@dx.ru http://136.73.ru From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 96412 invoked from network); 5 May 2004 18:44:49 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 5 May 2004 18:44:49 -0000 Received: (qmail 60497 invoked from network); 5 May 2004 18:44:49 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 5 May 2004 18:44:46 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BLRNu-000FOe-Gl for dave@picks.force9.co.uk; Wed, 05 May 2004 18:44:46 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BLRMG-00079z-U7 for rs_out_1@blacksheep.org; Wed, 05 May 2004 19:43:04 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BLRMF-00079q-Md for rsgb_lf_group@blacksheep.org; Wed, 05 May 2004 19:43:03 +0100 Received: from hafnium.btinternet.com ([194.73.73.121]) by relay.salmark.net with esmtp (Exim 4.24) id 1BLRMC-0005Zk-OL for rsgb_lf_group@blacksheep.org; Wed, 05 May 2004 19:43:00 +0100 Received: from [81.131.191.223] (helo=Main) by hafnium.btinternet.com with smtp (Exim 3.22 #25) id 1BLRM7-0002hW-00 for rsgb_lf_group@blacksheep.org; Wed, 05 May 2004 19:42:55 +0100 X-Bad-Message-ID: no DNS (Main) Message-ID: <002b01c432d0$cb869e00$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Wed, 5 May 2004 19:42:59 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi all, 5 sec "dots" with 10 sec spaces on 136.8kHz audible in JO02PB, IPSWICH Cheers de Alan G3NYK alan.melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23586 invoked from network); 5 May 2004 18:56:44 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore03.plus.net with SMTP; 5 May 2004 18:56:44 -0000 Received: (qmail 50018 invoked from network); 5 May 2004 18:56:44 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 5 May 2004 18:56:43 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BLRZT-000Ct5-81 for dave@picks.force9.co.uk; Wed, 05 May 2004 19:56:43 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BLRZA-0007Gq-L7 for rs_out_1@blacksheep.org; Wed, 05 May 2004 19:56:24 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BLRZA-0007Gh-8T for rsgb_lf_group@blacksheep.org; Wed, 05 May 2004 19:56:24 +0100 Received: from mta6-out.net.nltree.nl ([212.178.7.122]) by relay.salmark.net with esmtp (Exim 4.24) id 1BLRZ7-0005b8-AO for rsgb_lf_group@blacksheep.org; Wed, 05 May 2004 19:56:21 +0100 Received: from amsat.org (wk66.32947.ip.nltree.nl [217.100.138.196]) by mta6-out.net.nltree.nl (Postfix) with ESMTP id A966321834 for ; Wed, 5 May 2004 20:56:15 +0200 (MEST) Message-ID: <40993873.4030109@amsat.org> Date: Wed, 05 May 2004 20:54:43 +0200 From: Christiaan Roselaar User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> In-Reply-To: <002b01c432d0$cb869e00$6507a8c0@Main> X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Test Signal ?? Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Hi Alan, Hope to have my receiver and antenne ready next weekend. I'm a newby on 136. Hope to "see" You in the near future. 73's Chris PA3FUN Alan Melia wrote: >Hi all, 5 sec "dots" with 10 sec spaces on 136.8kHz audible in JO02PB, >IPSWICH > >Cheers de Alan G3NYK >alan.melia@btinternet.com > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 92367 invoked from network); 5 May 2004 23:04:00 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 5 May 2004 23:04:00 -0000 Received: (qmail 8689 invoked from network); 5 May 2004 23:04:00 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 5 May 2004 23:03:59 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BLVQk-00028Z-TA for dave@picks.force9.co.uk; Wed, 05 May 2004 23:03:58 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BLVQ9-0003iy-64 for rs_out_1@blacksheep.org; Thu, 06 May 2004 00:03:21 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BLVQ8-0003ip-J1 for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 00:03:20 +0100 Received: from protactinium.btinternet.com ([194.73.73.176]) by relay.salmark.net with esmtp (Exim 4.24) id 1BLVQ5-0005xh-Mz for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 00:03:17 +0100 Received: from [81.135.38.45] (helo=Main) by protactinium.btinternet.com with smtp (Exim 3.22 #25) id 1BLVQ4-0007bQ-00 for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 00:03:17 +0100 X-Bad-Message-ID: no DNS (Main) Message-ID: <000f01c432f5$2e1f5c40$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> <40993873.4030109@amsat.org> Date: Wed, 5 May 2004 23:10:28 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: Re: LF: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Chris after I typed the message I think I heard (I was away from the radio) an id from ON6ND who was testing a new aerial. I hope to hear you next weekend, new stations do not appear very often now and there may be several waiting to work you. Good Luck Cheers de Alan G3NYK ----- Original Message ----- From: "Christiaan Roselaar" To: Sent: 05 May 2004 19:54 Subject: Re: LF: Test Signal ?? > Hi Alan, > Hope to have my receiver and antenne ready next weekend. > I'm a newby on 136. > Hope to "see" You in the near future. > 73's Chris PA3FUN > > Alan Melia wrote: > > >Hi all, 5 sec "dots" with 10 sec spaces on 136.8kHz audible in JO02PB, > >IPSWICH > > > >Cheers de Alan G3NYK > >alan.melia@btinternet.com > > > > > > > > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 68111 invoked from network); 6 May 2004 19:27:16 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 6 May 2004 19:27:16 -0000 Received: (qmail 9848 invoked from network); 6 May 2004 19:27:16 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 6 May 2004 19:27:15 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BLoWZ-0002MZ-CA for dave@picks.force9.co.uk; Thu, 06 May 2004 19:27:15 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BLoVH-0001d4-As for rs_out_1@blacksheep.org; Thu, 06 May 2004 20:25:55 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BLoVG-0001cv-HG for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 20:25:54 +0100 Received: from smtp06.ya.com ([62.151.11.163] helo=smtp.ya.com) by relay.salmark.net with esmtp (Exim 4.24) id 1BLoVD-0007er-Bc for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 20:25:51 +0100 Received: from [62.151.102.44] (helo=waterhole) by smtp.ya.com with smtp id 1BLoV5-0002Ho-00 for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 21:25:43 +0200 X-Bad-Message-ID: no DNS (waterhole) Message-ID: <007701c4339f$f01c9c40$2c66973e@waterhole> From: "Miguel A. Vallejo" To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> <40993873.4030109@amsat.org> <000f01c432f5$2e1f5c40$6507a8c0@Main> Date: Thu, 6 May 2004 21:03:34 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi! Where do you made those tests? I haven't been able to heard any station since one month ago and I don't know exactly where to tune the receiver to listen... Is there a "calling frecuency" over Europe? Thanks! ----- Original Message ----- From: "Alan Melia" To: Sent: Thursday, May 06, 2004 12:10 AM Subject: Re: LF: Test Signal ?? > Hi Chris after I typed the message I think I heard (I was away from the > radio) an id from ON6ND who was testing a new aerial. I hope to hear you > next weekend, new stations do not appear very often now and there may be > several waiting to work you. > Good Luck > Cheers de Alan G3NYK From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 29982 invoked from network); 6 May 2004 19:27:46 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore03.plus.net with SMTP; 6 May 2004 19:27:46 -0000 Received: (qmail 8458 invoked from network); 6 May 2004 19:27:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 6 May 2004 19:27:43 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BLoX1-0001tV-S1 for dave@picks.force9.co.uk; Thu, 06 May 2004 20:27:43 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BLoWt-0001sP-00 for rs_out_1@blacksheep.org; Thu, 06 May 2004 20:27:35 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BLoWs-0001sF-JM for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 20:27:34 +0100 Received: from outmx006.isp.belgacom.be ([195.238.2.99]) by relay.salmark.net with esmtp (Exim 4.24) id 1BLoWp-0007fB-El for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 20:27:31 +0100 X-Fake-Domain: mh70i Received: from mh70i ([62.4.223.7]) by outmx006.isp.belgacom.be (8.12.11/8.12.11/Skynet-OUT-2.22) with SMTP id i46JRQlE014822 for ; Thu, 6 May 2004 21:27:26 +0200 (envelope-from ) X-Bad-Message-ID: no DNS (mh70i) Message-ID: <000e01c433a0$3b9ac840$07df043e@mh70i> From: "DE BONDT WERNER" To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> Date: Thu, 6 May 2004 21:27:54 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-RAVMilter-Version: 8.4.3(snapshot 20030212) (outmx006.isp.belgacom.be) X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1,TW_TN=0.077 Subject: LF: Re: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Alan and group I was testing my new antenna system so measuring the fieldstrengt on a distance it was 1.2mV/meter with 400Watts input I ended with my call ON6ND but maybe to short the OM was a motor and a micro switch HI But tnx for the report Vy 73 to all Werner ON6ND ----- Original Message ----- From: Alan Melia To: LF-Group Sent: Wednesday, May 05, 2004 8:42 PM Subject: LF: Test Signal ?? > Hi all, 5 sec "dots" with 10 sec spaces on 136.8kHz audible in JO02PB, > IPSWICH > > Cheers de Alan G3NYK > alan.melia@btinternet.com > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 76815 invoked from network); 6 May 2004 22:59:54 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore02.plus.net with SMTP; 6 May 2004 22:59:54 -0000 Received: (qmail 86659 invoked from network); 6 May 2004 22:59:54 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 6 May 2004 22:59:53 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BLrqL-000MJl-8r for dave@picks.force9.co.uk; Thu, 06 May 2004 22:59:53 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BLrpR-0005fk-Tx for rs_out_1@blacksheep.org; Thu, 06 May 2004 23:58:57 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BLrpR-0005fb-Bb for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 23:58:57 +0100 Received: from deet.btinternet.com ([194.73.73.29]) by relay.salmark.net with esmtp (Exim 4.24) id 1BLrpO-00082N-8C for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 23:58:54 +0100 Received: from [81.135.135.91] (helo=Main) by deet.btinternet.com with smtp (Exim 3.22 #25) id 1BLrpN-00057h-00 for rsgb_lf_group@blacksheep.org; Thu, 06 May 2004 23:58:53 +0100 X-Bad-Message-ID: no DNS (Main) Message-ID: <000701c433bd$b76e2120$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Thu, 6 May 2004 23:58:51 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: DSP Book free !! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi all, those of you with access to professional mags will no doubt have seen this, but I could not resist as it is at my favourite price ...FREE!! The book is "Digital Signal Processing for Scientists and Engineers". I am not recommending it or reviewing it....just have a look at the web site and make your own mind up.. The PDF of the whole book is just under 10Mbyte, but chapers can be downloaded separately, there are about 28 of them. Swot it all up and then ask Alberto some difficult questions !! http://www.dspguide.com/ Click the "browse and download" link, and take your choice there is no registration or log-in required. It may be rubbish but I doubt it, as it is offered by EDN magazine. Maybe I'm just getting too much of an old meany !! Cheers de Alan G3NYK alan.melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13852 invoked from network); 7 May 2004 08:16:58 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore01.plus.net with SMTP; 7 May 2004 08:16:58 -0000 Received: (qmail 49090 invoked from network); 7 May 2004 08:16:56 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 7 May 2004 08:16:44 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BM0XE-000Bjo-Ft for dave@picks.force9.co.uk; Fri, 07 May 2004 09:16:44 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BM0WO-0007au-Sy for rs_out_1@blacksheep.org; Fri, 07 May 2004 09:15:52 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BM0WO-0007al-1u for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 09:15:52 +0100 Received: from cmsrelay03.mx.net ([165.212.11.112]) by relay.salmark.net with smtp (Exim 4.24) id 1BM0WK-0000PQ-5L for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 09:15:48 +0100 Received: from uadvg137.cms.usa.net (165.212.11.137) by cmsoutbound.mx.net with SMTP; 7 May 2004 08:15:40 -0000 Received: from usa.net [151.41.157.47] by uadvg137.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.13N) with ESMTP id 893iegiPl0144M37; Fri, 07 May 2004 08:15:37 GMT X-USANET-Auth: 151.41.157.47 AUTH dibene@usa.net usa.net Message-ID: <409B45AE.2090706@usa.net> Date: Fri, 07 May 2004 10:15:42 +0200 From: Alberto di Bene User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <000701c433bd$b76e2120$6507a8c0@Main> In-Reply-To: <000701c433bd$b76e2120$6507a8c0@Main> X-Spam-Score: 2.8 (++) X-Spam-Report: autolearn=no,FAKE_HELO_USA_NET=2.8 Subject: Re: LF: DSP Book free !! Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 I have the paper edition of that book, courtesy of Analog Devices, and can only recommend it. Very well written indeed, with an eye to the doubts that newcomers to DSP techniques have. The math is right, not too much nor too few, but what pleases me most is the narrative tone. It is not a reference book, it is a learning book, full of those examples that you don't find in more academic texts, but that can augment your insights in the matter. 73 Alberto I2PHD ---------------------------------- Alan Melia wrote: >Hi all, those of you with access to professional mags will no doubt have >seen this, but I could not resist as it is at my favourite price ...FREE!! >The book is "Digital Signal Processing for Scientists and Engineers". I am >not recommending it or reviewing it....just have a look at the web site and >make your own mind up.. The PDF of the whole book is just under 10Mbyte, but >chapers can be downloaded separately, there are about 28 of them. Swot it >all up and then ask Alberto some difficult questions !! > >http://www.dspguide.com/ >Click the "browse and download" link, and take your choice there is no >registration or log-in required. It may be rubbish but I doubt it, as it is >offered by EDN magazine. >Maybe I'm just getting too much of an old meany !! > >Cheers de Alan G3NYK >alan.melia@btinternet.com > > > > >. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 45976 invoked from network); 7 May 2004 08:33:45 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 7 May 2004 08:33:45 -0000 Received: (qmail 40373 invoked from network); 7 May 2004 08:33:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 7 May 2004 08:33:44 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BM0ng-000AK8-Ey for dave@picks.force9.co.uk; Fri, 07 May 2004 08:33:44 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BM0nH-0007yA-4J for rs_out_1@blacksheep.org; Fri, 07 May 2004 09:33:19 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BM0nG-0007y1-LQ for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 09:33:18 +0100 Received: from relay.dera.gov.uk ([192.5.29.49] helo=relay.dstl.gov.uk) by relay.salmark.net with smtp (Exim 4.24) id 1BM0nD-0000RS-8a for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 09:33:15 +0100 Received: (qmail 17283 invoked from network); 7 May 2004 09:33:12 +0100 X-Fake-Domain: unknown Received: from unknown (HELO warlock.dstl.gov.uk) (192.5.29.10) by relay.dera.gov.uk with SMTP; 7 May 2004 09:33:12 +0100 Message-ID: <7D653C9C42F5D411A27C00508BF8803D01A9F4F5@mail.dstl.gov.uk> From: Talbot Andrew To: "'rsgb_lf_group@blacksheep.org'" Date: Fri, 7 May 2004 09:33:00 +0100 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2657.72) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: RE: LF: DSP Book free !! Content-Type: text/plain; charset=iso-8859-1; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit I agree - well worth getting the paper version, if only to save getting a bad neck peering at a computer screen for hours. Andy G4JNT -----Original Message----- From: Alberto di Bene [mailto:dibene@usa.net] Sent: 2004 May 07 09:16 To: rsgb_lf_group@blacksheep.org Subject: Re: LF: DSP Book free !! I have the paper edition of that book, courtesy of Analog Devices, and can only recommend it. Very well written indeed, with an eye to the doubts that newcomers to DSP techniques have. The math is right, not too much nor too few, but what pleases me most is the narrative tone. It is not a reference book, it is a learning book, full of those examples that you don't find in more academic texts, but that can augment your insights in the matter. 73 Alberto I2PHD ---------------------------------- Alan Melia wrote: >Hi all, those of you with access to professional mags will no doubt have >seen this, but I could not resist as it is at my favourite price ...FREE!! >The book is "Digital Signal Processing for Scientists and Engineers". I am >not recommending it or reviewing it....just have a look at the web site and >make your own mind up.. The PDF of the whole book is just under 10Mbyte, but >chapers can be downloaded separately, there are about 28 of them. Swot it >all up and then ask Alberto some difficult questions !! > >http://www.dspguide.com/ >Click the "browse and download" link, and take your choice there is no >registration or log-in required. It may be rubbish but I doubt it, as it is >offered by EDN magazine. >Maybe I'm just getting too much of an old meany !! > >Cheers de Alan G3NYK >alan.melia@btinternet.com > > > > >. > > > "This e-mail is intended for the recipient only. If you are not the intended recipient you must not use, disclose, distribute, copy, print, or rely upon this e-mail. If an addressing or transmission error has misdirected this e-mail, please notify the author by replying to this e-mail." "Recipients should note that all e-mail traffic on MOD systems is subject to monitoring and auditing." From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 54967 invoked from network); 7 May 2004 12:13:13 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 7 May 2004 12:13:13 -0000 Received: (qmail 30749 invoked from network); 7 May 2004 12:13:11 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 7 May 2004 12:13:05 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BM4Dx-0007I8-53 for dave@picks.force9.co.uk; Fri, 07 May 2004 12:13:05 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BM4DB-0003Q2-PM for rs_out_1@blacksheep.org; Fri, 07 May 2004 13:12:17 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BM4DB-0003Pt-6K for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 13:12:17 +0100 Received: from smtp803.mail.ukl.yahoo.com ([217.12.12.140]) by relay.salmark.net with smtp (Exim 4.24) id 1BM4D5-0000q0-6S for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 13:12:11 +0100 X-Fake-Domain: unknown Received: from unknown (HELO Main) (rsgb?lf?group@blacksheep.org@213.122.172.112 with poptime) by smtp803.mail.ukl.yahoo.com with SMTP; 7 May 2004 12:12:04 -0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <001301c4342c$86683c40$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> <000e01c433a0$3b9ac840$07df043e@mh70i> Date: Fri, 7 May 2004 13:12:00 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1,TW_TN=0.077 Subject: LF: Re: Re: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Werner, I guessed it was something like that, I should have known from the signal it was you. In fact just after I posted the message your timer send the ID and then I knew who it was. The signal is good audible here of course.....again this lunchtime (1209z) with your CQ audible (in SSB bandwidth) over my local noise....local fellow geriatrics watching TV !! Cheers de Alan G3NYK ----- Original Message ----- From: "DE BONDT WERNER" To: Sent: 06 May 2004 20:27 Subject: LF: Re: Test Signal ?? > Hi Alan and group > > I was testing my new antenna system > so measuring the fieldstrengt on a distance it was 1.2mV/meter > with 400Watts input > I ended with my call ON6ND but maybe to short > the OM was a motor and a micro switch HI > But tnx for the report > Vy 73 to all > > Werner ON6ND > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 75981 invoked from network); 7 May 2004 13:35:25 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 7 May 2004 13:35:25 -0000 Received: (qmail 34635 invoked from network); 7 May 2004 13:35:25 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 7 May 2004 13:35:24 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BM5Vc-0008nM-49 for dave@picks.force9.co.uk; Fri, 07 May 2004 13:35:24 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BM5V5-0005Fv-I3 for rs_out_1@blacksheep.org; Fri, 07 May 2004 14:34:51 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BM5V5-0005Fk-3q for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 14:34:51 +0100 Received: from mta06-svc.ntlworld.com ([62.253.162.46]) by relay.salmark.net with esmtp (Exim 4.24) id 1BM5V2-0000zA-2y for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 14:34:48 +0100 X-Fake-Domain: captbrian Received: from captbrian ([80.1.84.27]) by mta06-svc.ntlworld.com (InterMail vM.4.01.03.37 201-229-121-137-20020806) with SMTP id <20040507133447.NYUN25591.mta06-svc.ntlworld.com@captbrian> for ; Fri, 7 May 2004 14:34:47 +0100 X-Bad-Message-ID: no DNS (captbrian) Message-ID: <007e01c43438$18fc0900$98bc0150@captbrian> From: "captbrian" To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> <000e01c433a0$3b9ac840$07df043e@mh70i> <001301c4342c$86683c40$6507a8c0@Main> Date: Fri, 7 May 2004 14:35:00 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1,TW_TN=0.077 Subject: LF: Re: Re: Re: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 yu can hardly be a geriatric with a G3 plus 3 call. I'm earlier and just a boy really.. Now g2 plus 2 maybe.. G3GVB ----- Original Message ----- From: Alan Melia To: Sent: Friday, May 07, 2004 1:12 PM Subject: LF: Re: Re: Test Signal ?? > Hi Werner, I guessed it was something like that, I should have known from > the signal it was you. In fact just after I posted the message your timer > send the ID and then I knew who it was. The signal is good audible here of > course.....again this lunchtime (1209z) with your CQ audible (in SSB > bandwidth) over my local noise....local fellow geriatrics watching TV !! > Cheers de Alan G3NYK > > ----- Original Message ----- > From: "DE BONDT WERNER" > To: > Sent: 06 May 2004 20:27 > Subject: LF: Re: Test Signal ?? > > > > Hi Alan and group > > > > I was testing my new antenna system > > so measuring the fieldstrengt on a distance it was 1.2mV/meter > > with 400Watts input > > I ended with my call ON6ND but maybe to short > > the OM was a motor and a micro switch HI > > But tnx for the report > > Vy 73 to all > > > > Werner ON6ND > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 72887 invoked from network); 7 May 2004 14:38:23 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore01.plus.net with SMTP; 7 May 2004 14:38:23 -0000 Received: (qmail 16795 invoked from network); 7 May 2004 14:38:22 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 7 May 2004 14:38:15 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BM6UQ-0003mM-PQ for dave@picks.force9.co.uk; Fri, 07 May 2004 15:38:14 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BM6Tp-0006Rp-82 for rs_out_1@blacksheep.org; Fri, 07 May 2004 15:37:37 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BM6To-0006Rg-MI for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 15:37:36 +0100 Received: from rhenium.btinternet.com ([194.73.73.93]) by relay.salmark.net with esmtp (Exim 4.24) id 1BM6Tl-00015U-GG for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 15:37:33 +0100 Received: from [81.131.228.1] (helo=Main) by rhenium.btinternet.com with smtp (Exim 3.22 #25) id 1BM6Tj-0007X9-00 for rsgb_lf_group@blacksheep.org; Fri, 07 May 2004 15:37:32 +0100 X-Bad-Message-ID: no DNS (Main) Message-ID: <001001c43440$da2314e0$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <002b01c432d0$cb869e00$6507a8c0@Main> <000e01c433a0$3b9ac840$07df043e@mh70i> <001301c4342c$86683c40$6507a8c0@Main> <007e01c43438$18fc0900$98bc0150@captbrian> Date: Fri, 7 May 2004 15:37:30 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: Re: Re: Re: Test Signal ?? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Brian well you know what they say " you are as old as you feel" I guess you got a few turns up on me...maybe I can be a "neo-geriatric" then ?? Alan ----- Original Message ----- From: "captbrian" To: Sent: 07 May 2004 14:35 Subject: LF: Re: Re: Re: Test Signal ?? > yu can hardly be a geriatric with a G3 plus 3 call. > I'm earlier and just a boy really.. > Now g2 plus 2 maybe.. > > G3GVB From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 57232 invoked from network); 8 May 2004 06:58:45 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore03.plus.net with SMTP; 8 May 2004 06:58:45 -0000 Received: (qmail 83330 invoked from network); 8 May 2004 06:58:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 8 May 2004 06:58:44 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BMLnI-000LYW-3s for dave@picks.force9.co.uk; Sat, 08 May 2004 07:58:44 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BMLlk-0007xh-AI for rs_out_1@blacksheep.org; Sat, 08 May 2004 07:57:08 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BMLlj-0007xY-Fd for rsgb_lf_group@blacksheep.org; Sat, 08 May 2004 07:57:07 +0100 Received: from mta4.rcsntx.swbell.net ([151.164.30.28]) by relay.salmark.net with esmtp (Exim 4.24) id 1BMLlg-0002hv-5J for rsgb_lf_group@blacksheep.org; Sat, 08 May 2004 07:57:04 +0100 Received: from willow.nutstreet.net (adsl-66-137-59-33.dsl.tulsok.swbell.net [66.137.59.33]) by mta4.rcsntx.swbell.net (8.12.10/8.12.10) with ESMTP id i486upYS012862 for ; Sat, 8 May 2004 01:57:01 -0500 (CDT) Received: from willow.nutstreet.net (localhost.localdomain [127.0.0.1]) by willow.nutstreet.net (8.12.10/8.12.10) with ESMTP id i486v5A6003434 for ; Sat, 8 May 2004 01:57:05 -0500 Received: from localhost (eric@localhost) by willow.nutstreet.net (8.12.10/8.12.10/Submit) with ESMTP id i486v5u0003430 for ; Sat, 8 May 2004 01:57:05 -0500 Date: Sat, 8 May 2004 01:57:05 -0500 (CDT) From: Eric KD5UWL To: rsgb_lf_group@blacksheep.org In-Reply-To: <001301c4342c$86683c40$6507a8c0@Main> Message-ID: References: <002b01c432d0$cb869e00$6507a8c0@Main> <000e01c433a0$3b9ac840$07df043e@mh70i> <001301c4342c$86683c40$6507a8c0@Main> MIME-Version: 1.0 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: WD2XFX update Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Beacon "XFX" is on the air with new antenna: http://www.nutstreet.net/xfx/ Eric From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5185 invoked from network); 8 May 2004 13:07:25 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 8 May 2004 13:07:25 -0000 Received: (qmail 73473 invoked from network); 8 May 2004 13:07:25 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 8 May 2004 13:07:24 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BMRY4-000InH-Ek for dave@picks.force9.co.uk; Sat, 08 May 2004 13:07:24 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BMRXF-0000Ir-UB for rs_out_1@blacksheep.org; Sat, 08 May 2004 14:06:33 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BMRXE-0000Hu-4x for rsgb_lf_group@blacksheep.org; Sat, 08 May 2004 14:06:32 +0100 Received: from imo-m16.mx.aol.com ([64.12.138.206]) by relay.salmark.net with esmtp (Exim 4.24) id 1BMXBr-0001LD-Jc for rsgb_lf_group@blacksheep.org; Sat, 08 May 2004 20:08:51 +0100 X-Fake-Domain: DL4YHF@aol.com Received: from DL4YHF@aol.com by imo-m16.mx.aol.com (mail_out_v37_r1.3.) id l.1ac.23ebae85 (15875) for ; Sat, 8 May 2004 08:08:40 -0400 (EDT) Received: from aol.com (mow-d14.webmail.aol.com [205.188.139.130]) by air-id07.mx.aol.com (v99.12) with ESMTP id MAILINID72-3e03409ccdc8283; Sat, 08 May 2004 08:08:40 -0400 Date: Sat, 08 May 2004 08:08:40 -0400 From: DL4YHF@aol.com To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Message-ID: <59E05882.15A9E544.00041B63@aol.com> X-Mailer: Atlas Mailer 2.0 X-AOL-IP: 80.144.79.63 X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=no,NO_REAL_NAME=0.285 Subject: Re: LF: DSP Book free !! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Hi Alan and group, IMHO, book you mentioned "Digital Signal Processing for Scientists and Engineers" is ufb, I have actually tried a lot of the examples from it and most of them work flawlessly. In one of the DSP-related algorithms is an illegal array index (which causes a protection fault under certain programming languages), but the explanations are beautiful and lack most of the math overhead which you find in other textbooks. Regards, and hope to see some of you in Friedrichshafen this year. Wolf DL4YHF. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 69331 invoked from network); 9 May 2004 20:25:22 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 9 May 2004 20:25:22 -0000 Received: (qmail 61833 invoked from network); 9 May 2004 20:25:21 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 9 May 2004 20:25:20 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BMurQ-000Fl3-9N for dave@picks.force9.co.uk; Sun, 09 May 2004 21:25:20 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BMupo-0000ih-2q for rs_out_1@blacksheep.org; Sun, 09 May 2004 21:23:40 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BMupn-0000iY-Em for rsgb_lf_group@blacksheep.org; Sun, 09 May 2004 21:23:39 +0100 Received: from postbode03.zonnet.nl ([62.58.50.90]) by relay.salmark.net with esmtp (Exim 4.24) id 1BN1OC-0006Bj-J0 for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 04:23:36 +0100 Received: (qmail 30947 invoked by uid 10); 9 May 2004 20:23:27 -0000 Received: (vexira-qq 30894-3F5F66DA invoked from network) 09 May 2004 22:23:26 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.165]) (envelope-sender ) by postbode03.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 9 May 2004 20:23:26 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <001701c43602$1b335540$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Sun, 9 May 2004 22:02:39 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.55; host: postbode01.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: TX-ouput transformer problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello all, I completed my G0MRF-transmitter, and today I've done the first tests on it. All is working fine, except the output circuit. As far as I can see now, the outputt-transformer on the FET's is not good. I'm using an old core from the HV-circuit of a computer monitor. I got this tip from Jim, M0BMU a while ago. Core size is about 63x39x14mm (2 "C"shaped halves, held together with a metal spring clip) I payed a lot off atention to have no air gap. Used 10 turns on the primary side, centre tapped. (That means 2 times 5 turns.......) Secundairy coil max. 21 turns with taps, all as described in the original design. Well, at 15V drain voltage I already had 9Amp........ With 40V over 50 Ohm....... FET's got hot........ I changed primairy to 2 times 7 turns instead of 2 times 5 turns, and that gave me 15V, 5Amp with also around 40V over 50 Ohm. So, higher efficiency...... I wonder if anyone has experience with these core's and have hints about number of turns to be used, before I start to get into endless rewinding coils etc. 73 Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 74320 invoked from network); 9 May 2004 20:57:53 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 9 May 2004 20:57:53 -0000 Received: (qmail 6297 invoked from network); 9 May 2004 20:57:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 9 May 2004 20:57:51 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BMvMt-0001Gj-BO for dave@picks.force9.co.uk; Sun, 09 May 2004 20:57:51 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BMvMH-0001IY-Jb for rs_out_1@blacksheep.org; Sun, 09 May 2004 21:57:13 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BMvMG-0001IP-QR for rsgb_lf_group@blacksheep.org; Sun, 09 May 2004 21:57:12 +0100 Received: from hafnium.btinternet.com ([194.73.73.121]) by relay.salmark.net with esmtp (Exim 4.24) id 1BN1uf-0006HN-MV for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 04:57:09 +0100 Received: from [213.122.79.194] (helo=Main) by hafnium.btinternet.com with smtp (Exim 3.22 #25) id 1BMvLx-00059C-00 for rsgb_lf_group@blacksheep.org; Sun, 09 May 2004 21:56:54 +0100 X-Bad-Message-ID: no DNS (Main) Message-ID: <000601c43608$23aa0600$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> Date: Sun, 9 May 2004 21:56:42 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,RCVD_IN_SORBS=0.1 Subject: LF: Re: TX-ouput transformer problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Dick, I dont know whether the calculation is valid in this case but I dont see why not. I have always measured the inductance of the the primary winding and adjusted the turns until the reactance (secondary open of course) is at least 3 times the driving impedance. The driving impedance is probably not quoted by Dave but you can work back from the turns ratio to the 50 ohm secondary. In the case of a narrow band transformer like this situation, it might be better (more efficient) for the reactance to be 5 times the driving impedance impedance. You should also be able to work out what the reactance of Dave's transformer would be because the turns per uH should be quoted for 3C89 cores in the references. It would sound as though your LOPT cores do not have as high a permiability as Dave's cores, or maybe there is a slight effect from the air gap. I have certainly wound working transformers on old LOPT cores. I hope that helps ...if I've screwed it up no doubt someone will correct me. Cheers de Alan G3NYK alan.melia@btinternet.com ----- Original Message ----- From: "Dick" To: Sent: 09 May 2004 21:02 Subject: LF: TX-ouput transformer problems > Hello all, > > I completed my G0MRF-transmitter, and today I've done the > first tests on it. > All is working fine, except the output circuit. > > As far as I can see now, the outputt-transformer on the FET's is > not good. > > I'm using an old core from the HV-circuit of a computer monitor. > I got this tip from Jim, M0BMU a while ago. > Core size is about 63x39x14mm (2 "C"shaped halves, held together > with a metal spring clip) > I payed a lot off atention to have no air gap. > > Used 10 turns on the primary side, centre tapped. > (That means 2 times 5 turns.......) > Secundairy coil max. 21 turns with taps, all as described in the > original design. > Well, at 15V drain voltage I already had 9Amp........ > With 40V over 50 Ohm....... > FET's got hot........ > I changed primairy to 2 times 7 turns instead of 2 times 5 turns, > and that gave me 15V, 5Amp with also around 40V over 50 Ohm. > So, higher efficiency...... > > I wonder if anyone has experience with these core's and have hints about > number of turns to be used, before I start to get into endless rewinding > coils etc. > > 73 > > Dick, pa4vhf > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 12991 invoked from network); 9 May 2004 21:14:52 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore02.plus.net with SMTP; 9 May 2004 21:14:52 -0000 Received: (qmail 84627 invoked from network); 9 May 2004 21:14:51 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 9 May 2004 21:14:49 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BMvdJ-000LtI-9q for dave@picks.force9.co.uk; Sun, 09 May 2004 21:14:49 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BMvcr-0001cc-LJ for rs_out_1@blacksheep.org; Sun, 09 May 2004 22:14:21 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BMvcp-0001cT-W2 for rsgb_lf_group@blacksheep.org; Sun, 09 May 2004 22:14:20 +0100 Received: from web5-rme.xtra.co.nz ([210.86.15.245]) by relay.salmark.net with esmtp (Exim 4.24) id 1BN2BE-0006JO-FV for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 05:14:16 +0100 Received: from web3-rme.xtra.co.nz ([210.86.15.143]) by web5-rme.xtra.co.nz with ESMTP id <20040509211407.UQUU12816.web5-rme.xtra.co.nz@web3-rme.xtra.co.nz> for ; Mon, 10 May 2004 09:14:07 +1200 X-Fake-Domain: quaycustomer Received: from quaycustomer ([219.89.176.229]) by web3-rme.xtra.co.nz with SMTP id <20040509211352.QAAO3371.web3-rme.xtra.co.nz@quaycustomer> for ; Mon, 10 May 2004 09:13:52 +1200 X-Bad-Message-ID: no DNS (quaycustomer) Message-ID: <007c01c4360c$fdc3edc0$c401a8c0@quaycustomer> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> <000601c43608$23aa0600$6507a8c0@Main> Date: Mon, 10 May 2004 09:31:27 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 1.1 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052 Subject: LF: Re: Re: TX-ouput transformer problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Dick and Alan, I agree with comments from Alan, it does seem your core is either lower permability material, or there is still some unintended "air gap" (I have heard of gaps being set by glass beads in glue). I suggest that what is needed is a test of inductance of the primary side, at or near working frequency. A method I use is to series resonate the inductor under test with a known capacitor (I use a switchbox with polystyrene caps) and look for the resonant peak. Inject from a signal generator and a stepdown ratio (say 20:1 but it is not critical) toroid (to give lo Z source) and put one leg of the series circuit through the toroid. Monitor voltage across either the inductor or capacitor with a 10:1 scope probe (minimal loading at 10 megohms). Pick the capacitor that gives resonance nearest to the band of interest. This can also act as a reasonable Q meter, using the -3 dB response method. 73, Bob ZL2CA ----- Original Message ----- From: "Alan Melia" To: Sent: Monday, May 10, 2004 8:56 AM Subject: LF: Re: TX-ouput transformer problems > Hi Dick, I dont know whether the calculation is valid in this case but I > dont see why not. I have always measured the inductance of the the primary > winding and adjusted the turns until the reactance (secondary open of > course) is at least 3 times the driving impedance. The driving impedance is > probably not quoted by Dave but you can work back from the turns ratio to > the 50 ohm secondary. In the case of a narrow band transformer like this > situation, it might be better (more efficient) for the reactance to be 5 > times the driving impedance impedance. You should also be able to work out > what the reactance of Dave's transformer would be because the turns per uH > should be quoted for 3C89 cores in the references. It would sound as though > your LOPT cores do not have as high a permiability as Dave's cores, or maybe > there is a slight effect from the air gap. I have certainly wound working > transformers on old LOPT cores. > I hope that helps ...if I've screwed it up no doubt someone will correct me. > > Cheers de Alan G3NYK > alan.melia@btinternet.com > > ----- Original Message ----- > From: "Dick" > To: > Sent: 09 May 2004 21:02 > Subject: LF: TX-ouput transformer problems > > > > Hello all, > > > > I completed my G0MRF-transmitter, and today I've done the > > first tests on it. > > All is working fine, except the output circuit. > > > > As far as I can see now, the outputt-transformer on the FET's is > > not good. > > > > I'm using an old core from the HV-circuit of a computer monitor. > > I got this tip from Jim, M0BMU a while ago. > > Core size is about 63x39x14mm (2 "C"shaped halves, held together > > with a metal spring clip) > > I payed a lot off atention to have no air gap. > > > > Used 10 turns on the primary side, centre tapped. > > (That means 2 times 5 turns.......) > > Secundairy coil max. 21 turns with taps, all as described in the > > original design. > > Well, at 15V drain voltage I already had 9Amp........ > > With 40V over 50 Ohm....... > > FET's got hot........ > > I changed primairy to 2 times 7 turns instead of 2 times 5 turns, > > and that gave me 15V, 5Amp with also around 40V over 50 Ohm. > > So, higher efficiency...... > > > > I wonder if anyone has experience with these core's and have hints about > > number of turns to be used, before I start to get into endless rewinding > > coils etc. > > > > 73 > > > > Dick, pa4vhf > > > > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 60521 invoked from network); 9 May 2004 22:31:15 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 9 May 2004 22:31:15 -0000 Received: (qmail 42715 invoked from network); 9 May 2004 22:31:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 9 May 2004 22:31:14 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BMwpG-000Azr-5W for dave@picks.force9.co.uk; Sun, 09 May 2004 22:31:14 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BMwoe-00033c-H1 for rs_out_1@blacksheep.org; Sun, 09 May 2004 23:30:36 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BMwod-00033T-Vs for rsgb_lf_group@blacksheep.org; Sun, 09 May 2004 23:30:36 +0100 Received: from mailout02.sul.t-online.com ([194.25.134.17]) by relay.salmark.net with esmtp (Exim 4.24) id 1BN3N3-0006Ul-4D for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 06:30:33 +0100 X-Fake-Domain: fwd08.aul.t-online.de Received: from fwd08.aul.t-online.de by mailout02.sul.t-online.com with smtp id 1BMwmq-0001KB-00; Mon, 10 May 2004 00:28:44 +0200 X-Fake-Domain: oben Received: from oben (rxvWIOZc8e4kUhw+d79j-4t9Tf+BrdPCjg1LUjEk9dij2RsBIqnfUq@[80.128.182.133]) by fwd08.sul.t-online.com with smtp id 1BMwma-1riZ2e0; Mon, 10 May 2004 00:28:28 +0200 X-Bad-Message-ID: no DNS (oben) Message-ID: <001101c43615$b71730e0$ee9bfea9@oben> From: dj9dw To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> Date: Mon, 10 May 2004 00:33:56 +0200 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Seen: false X-ID: rxvWIOZc8e4kUhw+d79j-4t9Tf+BrdPCjg1LUjEk9dij2RsBIqnfUq X-Spam-Score: 1.3 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,RCVD_IN_NJABL=0.1,RCVD_IN_SORBS=0.1 Subject: LF: Re: TX-ouput transformer problems X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-type: text/plain; charset=windows-1252; format=flowed MIME-Version: 1.0 Content-transfer-encoding: 8bit ----- Original Message ----- From: "Dick" To: Sent: Sunday, May 09, 2004 10:02 PM Subject: LF: TX-ouput transformer problems > Hello all, > > I completed my G0MRF-transmitter, and today I've done the > first tests on it. > All is working fine, except the output circuit. > > As far as I can see now, the outputt-transformer on the FET's is > not good. > > I'm using an old core from the HV-circuit of a computer monitor. > I got this tip from Jim, M0BMU a while ago. > Core size is about 63x39x14mm (2 "C"shaped halves, held together > with a metal spring clip) > I payed a lot off atention to have no air gap. > > Used 10 turns on the primary side, centre tapped. > (That means 2 times 5 turns.......) > Secundairy coil max. 21 turns with taps, all as described in the > original design. > Well, at 15V drain voltage I already had 9Amp........ > With 40V over 50 Ohm....... > FET's got hot........ > I changed primairy to 2 times 7 turns instead of 2 times 5 turns, > and that gave me 15V, 5Amp with also around 40V over 50 Ohm. > So, higher efficiency...... > > I wonder if anyone has experience with these core's and have hints about > number of turns to be used, before I start to get into endless rewinding > coils etc. > > 73 > > Dick, pa4vhf > > > > > Hello Dick and group, I also was curious abt the output xformer, but what caused the trouble in my case was the timing of the PA-FETs. While one was still conducting, the seconde one was already conducting. The result was heavy ringing, hot FETs and miserable efficiency. One can prove that problem by watching the Voltage at CT. In my case it dropped rapidly seen as a negative pulse. Removing the two schottkies did not bring the highest performence, but now I can use it as a transmitter at least. 230 Watts out into a dummy at 60V DC and 5 Amps. Good luck and let us know abt your experience. vy 73 de Peter, DJ9DW. From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 66065 invoked from network); 10 May 2004 06:29:19 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 10 May 2004 06:29:19 -0000 Received: (qmail 47151 invoked from network); 10 May 2004 06:29:18 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 10 May 2004 06:29:17 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BN4Hr-000C8p-Cd for dave@picks.force9.co.uk; Mon, 10 May 2004 06:29:15 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BN4H9-0002iO-2K for rs_out_1@blacksheep.org; Mon, 10 May 2004 07:28:31 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BN4H8-0002iF-Hp for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 07:28:30 +0100 Received: from mail1.finet.se ([81.216.34.102]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNApX-0007hE-Hl for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 14:28:27 +0100 X-Fake-Domain: SM5EUFUrban Received: from SM5EUFUrban (snf2-53.finet.se [81.216.52.53]) by mail1.finet.se (8.12.8/8.12.8) with ESMTP id i4A6SPHM024391 for ; Mon, 10 May 2004 08:28:25 +0200 X-Bad-Message-ID: no DNS (SM5EUFUrban) Message-ID: <004501c43658$2d94b980$3534d851@SM5EUFUrban> From: "urban ekholm" To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> Date: Mon, 10 May 2004 08:29:41 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: 1.1 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052 Subject: LF: Re: TX-ouput transformer problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi all ! I made some tests on a TV line output core during the last winter, just to see if is suitable for an antenna matching transformer. Maybe this can be of some help: I used a core from an old coulour TV (22"-screen). The core was first taken apart and the thin pvc pieces giving a small air gap were removed and the cores were glued together with epoxy. On each leg (the ones whitch are circular) I wound 25 turns of 1mm wire (with electricians tape between the core and the first turns) which gave an inductance of about 330uH. This was connected between the tx and a Heathkit "Cantenna" dummy load with an SWR-meter between the tx and the transformer. The output was changed by changing the voltage on the PA. The SWR was very high, obviously too loose coupling between the windings (or wrong ferrite !) I then removed one winding and instead rewound it on top of the other (the same number of turns). Making the same test again and now the SWR was 1:1 ! Running 200W output for a couple of minutes gave no heating at all of neither the core nor the winding. The power output was increased to 350W and after about 10min a slight heating of the core was noticeable. With 470W output the temperature increases quicker and maybe using QRSS with longer transmissions will give problems. The last test was with 750W output. Still SWR 1:1 but the core temperature rises more quickly now and I did not test this fore a long time. The winding also now started to get warm Probably it would be possible to use 750W by using two cores "side by side" and thicker wire. However, I did not have enough thicker wire to perform this test. Good luck ! 73 SM5EUF / Urban ----- Original Message ----- From: "Dick" To: Sent: Sunday, May 09, 2004 10:02 PM Subject: LF: TX-ouput transformer problems > Hello all, > > I completed my G0MRF-transmitter, and today I've done the > first tests on it. > All is working fine, except the output circuit. > > As far as I can see now, the outputt-transformer on the FET's is > not good. > > I'm using an old core from the HV-circuit of a computer monitor. > I got this tip from Jim, M0BMU a while ago. > Core size is about 63x39x14mm (2 "C"shaped halves, held together > with a metal spring clip) > I payed a lot off atention to have no air gap. > > Used 10 turns on the primary side, centre tapped. > (That means 2 times 5 turns.......) > Secundairy coil max. 21 turns with taps, all as described in the > original design. > Well, at 15V drain voltage I already had 9Amp........ > With 40V over 50 Ohm....... > FET's got hot........ > I changed primairy to 2 times 7 turns instead of 2 times 5 turns, > and that gave me 15V, 5Amp with also around 40V over 50 Ohm. > So, higher efficiency...... > > I wonder if anyone has experience with these core's and have hints about > number of turns to be used, before I start to get into endless rewinding > coils etc. > > 73 > > Dick, pa4vhf > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5514 invoked from network); 10 May 2004 16:31:46 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore01.plus.net with SMTP; 10 May 2004 16:31:46 -0000 Received: (qmail 8568 invoked from network); 10 May 2004 16:31:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 10 May 2004 16:31:39 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BNDgp-0001as-0C for dave@picks.force9.co.uk; Mon, 10 May 2004 17:31:39 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNDft-0005FE-V9 for rs_out_1@blacksheep.org; Mon, 10 May 2004 17:30:41 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNDft-0005F5-9v for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 17:30:41 +0100 Received: from salador.ucs.mun.ca ([134.153.232.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNKEG-0000Mg-70 for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 00:30:36 +0100 Received: from plato.ucs.mun.ca (root@plato.ucs.mun.ca [134.153.232.151]) by salador.ucs.mun.ca (8.12.9p2/8.12.9) with ESMTP id i4AGSYEK077822 for ; Mon, 10 May 2004 13:59:05 -0230 (NDT) (envelope-from jcraig@morgan.ucs.mun.ca) Received: from plato.ucs.mun.ca (jcraig@localhost [127.0.0.1]) by plato.ucs.mun.ca (8.12.3p2/8.12.3) with ESMTP id i4AGSYgj002161 for ; Mon, 10 May 2004 13:58:34 -0230 (NDT) Received: (from jcraig@localhost) by plato.ucs.mun.ca (8.12.3p2/8.12.1/Submit) id i4AGSX3G019628; Mon, 10 May 2004 13:58:33 -0230 (NDT) Date: Mon, 10 May 2004 13:58:32 -0230 (NDT) From: Joe Craig X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org Message-ID: MIME-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: VO1NA Schedule Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Dear Group, For those of you who are interested, I will be on the air again starting tonight at 0000 UTC 11 May on 137.7770 kHz. 100 watts, 1.6 amps to a 100 metre sloping wire. QRSS30 on the hour, 3.5 minutes of silence then ID at 5 WPM until the next hour, 24 hours/day. Cheers Joe From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 38612 invoked from network); 10 May 2004 16:31:55 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 10 May 2004 16:31:55 -0000 Received: (qmail 10141 invoked from network); 10 May 2004 16:31:54 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 10 May 2004 16:31:52 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BNDh2-0002FV-I2 for dave@picks.force9.co.uk; Mon, 10 May 2004 17:31:52 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNDgp-0005Fy-LW for rs_out_1@blacksheep.org; Mon, 10 May 2004 17:31:39 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNDgp-0005Fp-94 for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 17:31:39 +0100 Received: from mailout07.sul.t-online.com ([194.25.134.83]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNKFD-0000Mn-GY for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 00:31:35 +0100 X-Fake-Domain: fwd01.aul.t-online.de Received: from fwd01.aul.t-online.de by mailout07.sul.t-online.com with smtp id 1BNDgh-0008VE-00; Mon, 10 May 2004 18:31:31 +0200 X-Fake-Domain: (VsefniZfoeoUc7kk97C3q78oqFVb3WygP8WAyTrAIu3y6-QxJ-cGk-@[62.224.51.15]) Received: from (VsefniZfoeoUc7kk97C3q78oqFVb3WygP8WAyTrAIu3y6-QxJ-cGk-@[62.224.51.15]) by fwd01.sul.t-online.com with smtp id 1BNDgZ-1tg6eu0; Mon, 10 May 2004 18:31:23 +0200 From: jannsen <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Date: Mon, 10 May 2004 18:31:23 +0200 Message-ID: <1BNDgZ-1tg6eu0@fwd01.sul.t-online.com> X-Seen: false X-ID: VsefniZfoeoUc7kk97C3q78oqFVb3WygP8WAyTrAIu3y6-QxJ-cGk- X-Spam-Score: 2.4 (++) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,FROM_STARTS_WITH_NUMS=1.574 Subject: Re: LF: TX-ouput transformer problems Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FROM_ENDS_IN_NUMS, FROM_STARTS_WITH_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dick schrieb: >..............2 "C"shaped halves, held together with a metal spring clip...... Hi Dick, I hope the metal clip does not work as something like a short-cut. better glue the halves together. BTW. I wonder if you know abt the progr "mini ring core calculator" by dl5swb (dl5swb@qsl.net). regards Uwe/dj8wx From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 80622 invoked from network); 10 May 2004 21:11:55 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 10 May 2004 21:11:55 -0000 Received: (qmail 66743 invoked from network); 10 May 2004 21:11:54 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 10 May 2004 21:11:52 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BNI3z-000GJd-WD for dave@picks.force9.co.uk; Mon, 10 May 2004 21:11:52 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNI2f-0001dn-PJ for rs_out_1@blacksheep.org; Mon, 10 May 2004 22:10:29 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNI2f-0001de-36 for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 22:10:29 +0100 Received: from postbode02.zonnet.nl ([62.58.50.89]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNOb4-0000vU-4C for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 05:10:26 +0100 Received: (qmail 30646 invoked by uid 10); 10 May 2004 20:56:09 -0000 Received: (vexira-qq 30435-3895498F invoked from network) 10 May 2004 22:56:04 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.222]) (envelope-sender ) by postbode02.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 10 May 2004 20:56:04 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000f01c436cf$d3b681a0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> <000601c43608$23aa0600$6507a8c0@Main> Date: Mon, 10 May 2004 22:29:23 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.57; host: postbode02.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: TX-ouput transformer problems--part 2 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Well, thanks all for your comments and tips. It helped me, and I got some ideas about what might be wrong. I soldered out the transformer, and did some measurements on it. Dispite all precautions I found that apperantly the 2 core halves didn't make an ideal contact. Pressing the two halves did gave a large difference in inductance......... To give you an idea, it changed from 70uH to over 130uH........ Now I have to find a creative way to put them under a continue pressure, also when temperature changes, and without making a short......... I think this is the main disadvantage of using these cores. Of course one clever guy can make an adjustable pressure system, allowing to 'tune' the coil........... I guess that the coil should be in resonance on 137kHz together with the 10nF drain capacitors, which means roughly somewhere around 126uH for each coil part....... Hope to find some time this week to do this......but busy..... 73 Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 81947 invoked from network); 10 May 2004 21:13:21 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 10 May 2004 21:13:21 -0000 Received: (qmail 14438 invoked from network); 10 May 2004 21:13:21 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 10 May 2004 21:13:17 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BNI5N-0003Cm-QL for dave@picks.force9.co.uk; Mon, 10 May 2004 21:13:17 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNI5G-0001gE-8k for rs_out_1@blacksheep.org; Mon, 10 May 2004 22:13:10 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNI5F-0001g3-DT for rsgb_lf_group@blacksheep.org; Mon, 10 May 2004 22:13:09 +0100 Received: from smtp804.mail.ukl.yahoo.com ([217.12.12.141]) by relay.salmark.net with smtp (Exim 4.24) id 1BNOde-0000vp-Ej for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 05:13:06 +0100 X-Fake-Domain: unknown Received: from unknown (HELO acer5gi5q0ubzj) (rsgb?lf?group@blacksheep.org@213.122.104.248 with poptime) by smtp804.mail.ukl.yahoo.com with SMTP; 10 May 2004 21:12:58 -0000 From: "John W Gould" To: "'Rsgb_Lf_Group@Blacksheep.Org'" Date: Mon, 10 May 2004 22:14:52 +0100 X-Bad-Message-ID: no DNS (langroup.wmg.warwick.ac.uk) Message-ID: <002301c436d3$d9506320$f8687ad5@langroup.wmg.warwick.ac.uk> MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Importance: Normal X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=no,OFFERS_ETC=0.197,RCVD_IN_SORBS=0.1 Subject: LF: HFC2004 - call for LF papers Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.2 required=5.0 tests=OFFERS_ETC autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 I am now in a position to announce that this year's HF & IOTA Convention is being held at the Europa Hotel, Gatwick (22 - 24th October). Last year we only managed a couple of LF sessions as many of those who normally contribute papers live in the SE of England, and Manchester was a few motorways too far north! We are now in the final stages of putting this year's programme for the event together so I would be keen to receive direct e-mails (jwgould@iee.org.uk) from anyone wishing to offer a presentation at this year's event. In considering suitable topics remember that we like the event to be inclusive so introductory talks of interest newcomers would be considered along with the more advanced topics. 73 John, G3WKL Chairman HFC2004 Organising Committee From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 79622 invoked from network); 11 May 2004 00:09:35 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 11 May 2004 00:09:35 -0000 Received: (qmail 45658 invoked from network); 11 May 2004 00:09:34 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 11 May 2004 00:09:33 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BNKpx-000Bcr-Nw for dave@picks.force9.co.uk; Tue, 11 May 2004 01:09:33 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNKp6-00052L-H0 for rs_out_1@blacksheep.org; Tue, 11 May 2004 01:08:40 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNKp5-00052C-Tq for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 01:08:39 +0100 Received: from smtp804.mail.ukl.yahoo.com ([217.12.12.141]) by relay.salmark.net with smtp (Exim 4.24) id 1BNRNU-0001AG-S3 for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 08:08:36 +0100 X-Fake-Domain: unknown Received: from unknown (HELO Main) (rsgb?lf?group@blacksheep.org@81.131.219.184 with poptime) by smtp804.mail.ukl.yahoo.com with SMTP; 11 May 2004 00:08:31 -0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <002b01c436ec$1a078a20$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <001701c43602$1b335540$2102000a@ibm> <000601c43608$23aa0600$6507a8c0@Main> <000f01c436cf$d3b681a0$2102000a@ibm> Date: Tue, 11 May 2004 00:57:29 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,RCVD_IN_SORBS=0.1 Subject: LF: Re: TX-ouput transformer problems--part 2 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Dick, I am not totally sure of the design, but I believe the transformer does NOT resonate with the drain capacitor. I believe to work best the circuit is close to Class-E operation The drain capacitor determines the optimum power level. Energy stored in the drain choke should flow into the capacitor when the FET switches off. I am not sure of the design conditions but this is the same effect as in my single-ended Clas-E PA experiments. The best literature on these designs is by Nathan Sokal and Fritz Raab. Nat published a paper in QEX about 3 years ago on Class-E designs. Raab has published papers and books on alternative configurations, bothe single ended and push-pull. Though there are "tuned circuits" in the high efficiency stages they are NOT resonant at the operating frequency, but usually about 10% lower in frequency !! As to the cores I think you are on your own there as each specimen will probably be slightly different. I think it may be better to try to find some large (not split) toroidal cores from old switch-mode PSUs and wind these to the reactance formula once you find how the permiability of the cores compares with 3C89s. 70uH should be about enough for the transformer winding. That is about 60ohm at 137kHz, and the PA drive impedance is in the 10 ohm range. The problem may be the variability. Cheers de Alan G3NYK ----- Original Message ----- From: "Dick" To: Sent: 10 May 2004 21:29 Subject: LF: TX-ouput transformer problems--part 2 > Well, thanks all for your comments and tips. > It helped me, and I got some ideas about what > might be wrong. > > I soldered out the transformer, and did some > measurements on it. > Dispite all precautions I found that apperantly the > 2 core halves didn't make an ideal contact. > Pressing the two halves did gave a large difference > in inductance......... > To give you an idea, it changed from 70uH to over 130uH........ > Now I have to find a creative way to put them under a > continue pressure, also when temperature changes, and > without making a short......... > I think this is the main disadvantage of using these cores. > Of course one clever guy can make an adjustable pressure > system, allowing to 'tune' the coil........... > > I guess that the coil should be in resonance on 137kHz together > with the 10nF drain capacitors, which means roughly somewhere > around 126uH for each coil part....... > > Hope to find some time this week to do this......but busy..... > > 73 Dick, pa4vhf > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 70546 invoked from network); 11 May 2004 02:24:59 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 11 May 2004 02:24:59 -0000 Received: (qmail 96957 invoked from network); 11 May 2004 02:24:59 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 11 May 2004 02:24:58 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BNMwx-000OtG-R8 for dave@picks.force9.co.uk; Tue, 11 May 2004 02:24:55 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNMwO-0007Z3-8k for rs_out_1@blacksheep.org; Tue, 11 May 2004 03:24:20 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNMwN-0007Yu-7S for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 03:24:19 +0100 Received: from bay12-f20.bay12.hotmail.com ([64.4.35.20] helo=hotmail.com) by relay.salmark.net with esmtp (Exim 4.24) id 1BNTUl-0001Jn-Cr for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 10:24:15 +0100 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 10 May 2004 19:24:05 -0700 Received: from 24.116.116.38 by by12fd.bay12.hotmail.msn.com with HTTP; Tue, 11 May 2004 02:24:05 GMT X-Originating-IP: [24.116.116.38] X-Originating-Email: [hellozerohellozero@hotmail.com] X-Sender: hellozerohellozero@hotmail.com From: "Laurence KL1X" To: lowfer@mailman.qth.net, rsgb_lf_group@blacksheep.org Date: Mon, 10 May 2004 18:24:05 -0800 Mime-Version: 1.0 Message-ID: X-OriginalArrivalTime: 11 May 2004 02:24:05.0625 (UTC) FILETIME=[0840EE90:01C436FF] X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,TW_DX=0.077,TW_XD=0.077 Subject: LF: LF rx operation - from Fiji Content-Type: text/plain; charset=windows-1252; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Confirming Ill be setting up in Fiji 3D2 on 19/20th June and should be receiving up till around 8th July - these dates may vary but its hope the station will stay monitoring even if Im not as base camp some 45 miles drive from Suva on the S side of the Island. This side doesnt favor "going North" paths but seeing as I cant see to guarantee which way the signals come from I dont its too bad a location being less than a mile from the coast. Rx antennae will be a "steerable" K9AY + pre amp being deployed to reduce the likely qrmn. Rx tests continue here at the moment but it will be the TS870/850 or FRG100 - these dates may coincide with some other LF tests but dont let the fact its summer in Eu and winter in Oz/nz stop any experimentation. DCf39 will be used as the LF Eu beacon. I maybe able to upload Argos' to my present website http://myweb.cableone.net/flow if I can get more than 9.6K out of the landlines. Talk back on HF is likely but Im still (since Jan!) waiting for the callsign - the ministry has just moved and a lot of applications have been mislaid including mine. Im on the island to set up an mulitsite HF net and teach some of the charity staff what a dipole isnt. (http://www.raleighinternational.org.uk) so this isnt just a ham dxexpedition and time will be shared - I also hope to sit on a beach for a while with my wife! More when I have it. Future expeditions to Southern Patagonia in October are likely but I know I have the Andes in the way for a lot of directons, but there again it didnt stop Eu reception in the centre of the volcanoes in Costa Rica. Laurence KL1X/5, wd2xdw ...-.- _________________________________________________________________ MSN Toolbar provides one-click access to Hotmail from any Web page – FREE download! http://toolbar.msn.com/go/onm00200413ave/direct/01/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 37853 invoked from network); 11 May 2004 20:18:55 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 11 May 2004 20:18:55 -0000 Received: (qmail 72138 invoked from network); 11 May 2004 20:18:55 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 11 May 2004 20:18:54 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BNdiI-000IYC-2h for dave@picks.force9.co.uk; Tue, 11 May 2004 20:18:54 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNdhN-0002H3-Vn for rs_out_1@blacksheep.org; Tue, 11 May 2004 21:17:57 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNdhN-0002Gu-HG for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 21:17:57 +0100 Received: from postbode01.zonnet.nl ([62.58.50.88]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNkFm-0002w1-Bx for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 04:17:54 +0100 Received: (qmail 7021 invoked by uid 10); 11 May 2004 20:10:59 -0000 Received: (vexira-qq 07007-D0C39D3D invoked from network) 11 May 2004 22:10:58 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.191.47]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 11 May 2004 20:10:58 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000b01c43792$b0fc63a0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Tue, 11 May 2004 22:00:03 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.59; host: postbode01.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: G0MRF transmitter problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello all, well I rewound the ouput transformer. Again I have problems, and when checking the signal on a spectrum analyzer I found that it is peaking on the second harmonic. So it transmits the main signal on 272kHz......... 136kHz is also present at the ouput, but much much weaker. It really makes me puzzling. Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 19676 invoked from network); 11 May 2004 21:23:14 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 11 May 2004 21:23:14 -0000 Received: (qmail 46436 invoked from network); 11 May 2004 21:23:14 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 11 May 2004 21:23:13 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BNeiW-000Bx5-Te for dave@picks.force9.co.uk; Tue, 11 May 2004 22:23:12 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNehO-0003gd-6R for rs_out_1@blacksheep.org; Tue, 11 May 2004 22:22:02 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNehN-0003gU-DS for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 22:22:01 +0100 Received: from smtp.wp.pl ([212.77.101.160]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNlFm-000323-Bv for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 05:21:58 +0100 Received: (wp-smtpd smtp.wp.pl 25878 invoked from network); 11 May 2004 23:01:21 +0200 Received: from pa136.sulejowek.sdi.tpnet.pl (HELO sp5zcctrx1) (sq5bpm@[217.99.156.136]) (envelope-sender ) by smtp.wp.pl (wp-smtpd) with SMTP for ; 11 May 2004 23:01:21 +0200 X-Bad-Message-ID: no DNS (men.edu.pl) Message-ID: <000f01c4379b$1cc8d980$c510a8c0@men.edu.pl> From: "Marek SQ5BPM" To: rsgb_lf_group@blacksheep.org Date: Tue, 11 May 2004 21:01:15 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-AntiVirus: skaner antywirusowy poczty Wirtualnej Polski S. A. [wersja 2.0c] X-WP-AntySpam-Rezultat: NIE-SPAM X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: G0MRF transmitter problems Content-Type: text/plain; charset=windows-1250; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello Dick and all, > Hello all, > > well I rewound the ouput transformer. > Again I have problems, and when checking the signal on > a spectrum analyzer I found that it is peaking on the second harmonic. > So it transmits the main signal on 272kHz......... > 136kHz is also present at the ouput, but much much weaker. > > It really makes me puzzling. > > Dick, pa4vhf You're lucky to owe a spectrum analyzer! It would have saved me a lot of time in some projects... However, if you have an oscilloscope as well, check the waveform on FETs, should be fairly close to a square wave. Heavy ringing can pull the output waveform almost to zero after the initial peak, thus making the double frequency (at least this happened to me). Check also for possible coupling of the ouput stage with CMOS driver. What helped in my case was a solution by G3YXM (thank you!) : a capacitor around 1nF in series with around 22 ohms resistor, both connected in parallel to the primary winding of the transformer (marked as Z on the schematic here http://www.wireless.org.uk/136bigtx2.gif ). I am still trying to get some motivation for finishing the RX loop... 73! Marek SQ5BPM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 62623 invoked from network); 11 May 2004 21:59:32 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 11 May 2004 21:59:32 -0000 Received: (qmail 24497 invoked from network); 11 May 2004 21:59:32 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 11 May 2004 21:59:30 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BNfHe-0006F7-Bj for dave@picks.force9.co.uk; Tue, 11 May 2004 21:59:30 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNfHG-0004K6-Ki for rs_out_1@blacksheep.org; Tue, 11 May 2004 22:59:06 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNfHF-0004Jx-1R for rsgb_lf_group@blacksheep.org; Tue, 11 May 2004 22:59:05 +0100 Received: from standby2-rme.xtra.co.nz ([210.86.15.58] helo=standby2.xtra.co.nz) by relay.salmark.net with esmtp (Exim 4.24) id 1BNlpd-00035c-Ek for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 05:59:01 +0100 Received: from mta3-rme.xtra.co.nz ([210.86.15.142]) by standby2.xtra.co.nz with ESMTP id <20040511215838.QLQR20507.standby2.xtra.co.nz@mta3-rme.xtra.co.nz> for ; Wed, 12 May 2004 09:58:38 +1200 X-Fake-Domain: bob2l2u6k2n1g3 Received: from bob2l2u6k2n1g3 ([219.89.176.229]) by mta3-rme.xtra.co.nz with SMTP id <20040511215836.OJNN11405.mta3-rme.xtra.co.nz@bob2l2u6k2n1g3> for ; Wed, 12 May 2004 09:58:36 +1200 X-Bad-Message-ID: no DNS (bob2l2u6k2n1g3) Message-ID: <001201c437a3$18673370$e901a8c0@bob2l2u6k2n1g3> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <000b01c43792$b0fc63a0$2102000a@ibm> Date: Wed, 12 May 2004 09:58:24 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: G0MRF transmitter problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Dick, > well I rewound the ouput transformer. > Again I have problems, and when checking the signal on > a spectrum analyzer I found that it is peaking on the second harmonic. > So it transmits the main signal on 272kHz......... > 136kHz is also present at the ouput, but much much weaker. > > It really makes me puzzling. Double trouble. Are you certain of the windings being correctly phased for "push-pull"? You may have made a "push-push doubler"??? 73, Bob From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 31147 invoked from network); 12 May 2004 08:38:34 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore02.plus.net with SMTP; 12 May 2004 08:38:34 -0000 Received: (qmail 21704 invoked from network); 12 May 2004 08:38:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 May 2004 08:38:32 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BNpG4-0005Fg-CF for dave@picks.force9.co.uk; Wed, 12 May 2004 08:38:32 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNpF5-0008Gk-UD for rs_out_1@blacksheep.org; Wed, 12 May 2004 09:37:31 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNpF5-0008Gb-9s for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 09:37:31 +0100 Received: from imo-d03.mx.aol.com ([205.188.157.35]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNvnU-0003qq-6Q for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 16:37:28 +0100 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-d03.mx.aol.com (mail_out_v37_r1.3.) id l.8d.aa59ac4 (3980) for ; Wed, 12 May 2004 04:37:15 -0400 (EDT) From: G0MRF@aol.com Message-ID: <8d.aa59ac4.2dd33c3a@aol.com> Date: Wed, 12 May 2004 04:37:14 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 X-Spam-Score: 0.7 (/) X-Spam-Report: autolearn=no,HTML_MESSAGE=0.001,HTML_TAG_BALANCE_HTML=0.411,NO_REAL_NAME=0.285 Subject: LF: Output transformer problems Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.7 required=5.0 tests=HTML_MESSAGE, HTML_TAG_BALANCE_HTML,NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 5/11/04 10:59:45 PM GMT Daylight Time, vernall@xtra.co.nz writes:

>well I rewound the ouput transformer.
>Again I have problems, and when checking the signal on
>a spectrum analyzer I found that it is peaking on the second harmonic.
>So it transmits the main signal on 272kHz.........
>136kHz is also present at the ouput, but much much weaker.
>
>It really makes me puzzling.

Double trouble.  Are you certain of the windings being correctly phased for
"push-pull"?  You may have made a "push-push doubler"???

73, Bob





Hi.

Have been following this topic.  Maybe this will help.

I've just wound 10 turns on a 58mm 3C90 core and the inductance measured 353uH.

The 10nF on the drains are intended for spike suppression not resonance.

If you can change the design to get class E, at your required output power, then efficiency / dissipation / drain transients would all improve.

The square wave drive should not contain significant amounts of second harmonic.  The "push pull doubler" can be created by a fault in the FETs insulating washers, or if they are directly connected to a common isolated heatsink.

Do you have square waves on the drive?  Upside down Schottky diodes will distort the drive and cause excess dissipation as the FETs will not be fully 'on'

Good luck

David  G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 75882 invoked from network); 12 May 2004 11:54:45 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 12 May 2004 11:54:45 -0000 Received: (qmail 16156 invoked from network); 12 May 2004 11:54:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 May 2004 11:54:44 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BNsJt-0003rI-PZ for dave@picks.force9.co.uk; Wed, 12 May 2004 11:54:41 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNsIs-0003iI-Pi for rs_out_1@blacksheep.org; Wed, 12 May 2004 12:53:38 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNsIr-0003i9-Mv for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 12:53:37 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BNyrF-00047Z-Oo for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 19:53:33 +0100 X-Fake-Domain: altair Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1BNrkt-0002dY-00 for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 12:18:31 +0100 X-No-DNS-For: 147.197.164.230 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1BNrks-0006aC-00 for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 12:18:31 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 May 2004 12:18:30 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-UH-MailScanner: No Virus detected X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: RE: G0MRF transmitter problems- investigations (long!) Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dear LF Group, I built one of the G0MRF TX boards a few years back, with the intention of using it for /P operation, but other things have prevented me doing that yet... Reading about PA4VHF's problems persuaded me to try running my board at full output. I found I had similar problems to the ones Dick describes - the DC supply current was rather high, and components got hot, especially the output transformer. Increasing the DC input to more than about 100W led to things getting excessively hot. My board is quite faithful to the original G0MRF article, using the 2x 42mm 3C85 toroid cores, which made it unlikely that Dick's LOPT core was the source of the trouble. Although these salvaged cores are not an exact equivalent, the ferrite material and the other core parameters are certainly very similar, so one can expect very similar performance. There are 2 basic types of class D amplifier, the voltage-fed type, where the power supply is a low impedance voltage source and the load is series resonant at the operating frequency (the Decca PAs are this type), and current-fed type, where the supply is a current source (in practice fed through a choke) and the load is parallel resonant at the operating frequency. Ideally, the voltage-fed type has a square-wave voltage at the MOSFET drains, and a sinusoidal drain current, while the current-fed type has sinusoidal drain voltage and square-wave drain current. Looking at the circuit, David's design seems to be half way between the two; the supply decoupling capacitor has a reactance comparable with the load impedance, so the supply voltage to the transformer primary is by no means constant, but neither is it a high impedance, constant current, so one would expect the voltage and current waveforms to be some kind of distorted sine wave. However, the low-pass output is very low loaded Q, and so is not really series or parallel resonant... I wasn't sure what to expect! Connecting up the scope showed actual waveforms that reminded me of those bizarre spiky deep-sea fishes you see on TV nature programs, with very heavy ringing with high frequency spikes and lower frequency undulations. Ringing was occurring basically at 2 frequencies; roughly 300kHz and 1.6MHz, with the ringing currents actually larger than the desired 136kHz current. This explains the high losses in the transformer. Some experimentation showed that the 1.6MHz resonance was due to a combination of the MOSFET output capacitance and the leakage inductance of the transformer primaries. The 300kHz ringing was associated with the primary and secondary leakage inductance, the input capacitor of the LPF, and the 470n "decoupling" capacitor. The output waveform of the transformer was a totally different shape, supporting the idea that leakage inductance was the main culprit for the peculiar waveforms. To improve circuit operation, I did 2 things. First, I wound a new output transformer with lower leakage inductance. The primaries are 2 x 4 turns, wound in bifilar fashion to minimize leakage inductance between them. The secondary is 16 turns to give the same 4:1 ratio as before. The windings are made as compact as possible rather than distributing them around the whole core, with the primaries wound directly on top of the secondary to minimize leakage flux. I used a salvaged line output transformer core of identical dimensions to the one Dick describes. The new transformer has much lower winding inductance than the original - the secondary is about 500uH instead of a couple of mH of the original - but the inductance is still more than adequate. The reduced leakage inductance shifts the 1.6MHz ringing to about 8MHz; I replaced the original 10nF capacitors between the MOSFET drains and ground with a series combination of 5ohm/4.7nF, which largely damps this out. I also modified the circuit so that it is definitely voltage-fed, by replacing the power supply choke with a short circuit (decoupling the transformer centre tap to ground with about 5uF total, and replacing the pi-section output filter with a series-tuned tank circuit of 11.5nF/110uH. The leakage inductance of the secondary is absorbed into the series tank circuit inductance, which effectively kills the 300kHz resonance. The new circuit has voltage and current waveforms which are much closer to the "text book" voltage-fed class D, apart from some switching spikes where the MOSFETs turn on and off. Running with 40V, 10A DC input, the efficiency seems to be over 90%, and after 20 minutes key-down operation, the MOSFETs and transformer were certainly warm but still acceptable temperature. The damping resistors connected to the MOSFET drains dissipate a few watts each I guess. So this seems to improve things greatly. There are still things to be done; at the moment the loaded Q of the series tank circuit is only about 2 (the components were to hand...), so there is some visible distortion of the output waveform with a resistive load, so I might increase the Q or change the output network design. It should be possible to further reduce the leakage inductance of the transformer primary by using metal strip windings. It might be interesting to try a current-fed variant, although the tank circuit component values will be more awkward. I hope this is enough to suggest a way forward, although I don't have time to go into more detail at the moment - I hope to write up some more info on this later, perhaps at the weekend. Obviously, the operation of the original circuit will be very dependent on the exact transformer construction - I think this may explain why some builders have had trouble, whilst others have had good results from this type of circuit. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 82816 invoked from network); 12 May 2004 16:58:48 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 12 May 2004 16:58:48 -0000 Received: (qmail 78226 invoked from network); 12 May 2004 16:58:47 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 12 May 2004 16:58:46 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BNx4A-000K7x-Dg for dave@picks.force9.co.uk; Wed, 12 May 2004 16:58:46 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNx3Y-0001Z6-1Y for rs_out_1@blacksheep.org; Wed, 12 May 2004 17:58:08 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNx3X-0001Yx-9b for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 17:58:07 +0100 Received: from cmsrelay01.mx.net ([165.212.11.110]) by relay.salmark.net with smtp (Exim 4.24) id 1BO3bt-0004bQ-Pk for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 00:58:01 +0100 Received: from cmsapps02.cms.usa.net (165.212.11.138) by cmsoutbound.mx.net with SMTP; 12 May 2004 16:57:49 -0000 Received: from usa.net [151.41.154.97] by cmsapps02.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.13N) with ESMTP id 338ieLq6U0298M38; Wed, 12 May 2004 16:57:46 GMT X-USANET-Auth: 151.41.154.97 AUTH dibene@usa.net usa.net Message-ID: <40A2578C.2080600@usa.net> Date: Wed, 12 May 2004 18:57:48 +0200 From: Alberto di Bene User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: LF Mailing List X-Spam-Score: 2.8 (++) X-Spam-Report: autolearn=no,FAKE_HELO_USA_NET=2.8 Subject: LF: VDC source with microvolt resolution Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 I wonder if someone on this list has already had a problem similar to this, and has found a simple solution. Problem: I have a super-filtered and stable DC voltage of about 8V. I need to make it variable (with negligible current requirements) from abt 0 to abt 8V, with a minimum step size of abt 10 uV. I can use part of the processing power of an AVR microcontroller for this task. One solution that comes immediately to the mind is to use a 20-bit DAC, fed somehow with that stable voltage, but I am in search of something that doesn't need hard-to-find components. I played with the idea of a charge pump, where you control with a couple of output bits of a port of the micro the charge and discharge of a capacitor for variable lenghts of time, so to achieve the wanted result, but I am unsure of the implementation details. The response time requirements are very relaxed, there will be an adjustment of that voltage let's say once every two minutes or more. Has anybody suggestions or links ? Many thanks 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26989 invoked from network); 12 May 2004 19:21:24 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 12 May 2004 19:21:24 -0000 Received: (qmail 57342 invoked from network); 12 May 2004 19:21:24 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 May 2004 19:21:19 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BNzI6-000EfH-V7 for dave@picks.force9.co.uk; Wed, 12 May 2004 19:21:19 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNzHU-0004bj-6N for rs_out_1@blacksheep.org; Wed, 12 May 2004 20:20:40 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNzHT-0004ba-L3 for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 20:20:39 +0100 Received: from virus-out.ttyl.com ([193.212.240.200] helo=virus-out-st.online.no) by relay.salmark.net with esmtp (Exim 4.24) id 1BO5ps-0004qO-02 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 03:20:36 +0100 X-Fake-Domain: tns-fbu-22-208.corp.telenor.no Received: from tns-fbu-22-208.corp.telenor.no ([134.47.162.90] [134.47.162.90]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 21:18:28 +0200 X-Fake-Domain: tns-fbu-22-213.corp.telenor.no Received: from tns-fbu-22-213.corp.telenor.no ([134.47.162.191]) by tns-fbu-22-208.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.6713); Wed, 12 May 2004 21:18:28 +0200 X-Fake-Domain: TNS-FBU-2E-006.corp.telenor.no Received: from TNS-FBU-2E-006.corp.telenor.no ([134.47.162.86]) by tns-fbu-22-213.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.6713); Wed, 12 May 2004 21:18:28 +0200 content-class: urn:content-classes:message X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 Date: Wed, 12 May 2004 21:18:28 +0200 X-Bad-Message-ID: no DNS (TNS-FBU-2E-006.corp.telenor.no) Message-Id: Thread-Topic: LF: RE: RF Current meter Thread-Index: AcP3lNm4BpA0JXWhRIqAwAXR4CqKzBAwMMrg From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 12 May 2004 19:18:28.0496 (UTC) FILETIME=[E7C3C900:01C43855] MIME-Version: 1.0 X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,HTML_40_50=0.474,HTML_FONTCOLOR_BLUE=0.1,HTML_FONT_BIG=0.1,HTML_MESSAGE=0.001,NO_REAL_NAME=0.285 Subject: LF: =?iso-8859-1?Q?RE=3A_LF=3A_RE=3A_Attn=2E_PA=F8SE?= Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_40_50,HTML_FONTCOLOR_BLUE, HTML_FONT_BIG,HTML_MESSAGE,NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Dick,
would you pls send me a mail, I've lost your email address, and the two PC's at home has broken down (harddisk crash)
 
73
Jan-Martin

---
J M Nøding, Datakvalitet, TTS, Kristiansand
-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Dick Rollema
Sent: 20. februar 2004 10:31
To: rsgb_lf_group@blacksheep.org

From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 33536 invoked from network); 12 May 2004 19:27:13 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 12 May 2004 19:27:13 -0000 Received: (qmail 4016 invoked from network); 12 May 2004 19:27:12 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 May 2004 19:27:11 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BNzNm-0000kQ-W2 for dave@picks.force9.co.uk; Wed, 12 May 2004 19:27:11 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNzNL-0004fh-Bb for rs_out_1@blacksheep.org; Wed, 12 May 2004 20:26:43 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNzNK-0004fY-M8 for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 20:26:42 +0100 Received: from smtp802.mail.ukl.yahoo.com ([217.12.12.139]) by relay.salmark.net with smtp (Exim 4.24) id 1BO5vj-0004rm-2z for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 03:26:39 +0100 X-Fake-Domain: unknown Received: from unknown (HELO Dell5150) (rsgb?lf?group@blacksheep.org@217.44.241.198 with poptime) by smtp802.mail.ukl.yahoo.com with SMTP; 12 May 2004 19:07:49 -0000 From: "Dave Pick" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 May 2004 20:07:54 +0100 MIME-Version: 1.0 X-Mailer: Microsoft Office Outlook, Build 11.0.5510 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 Thread-Index: AcQ4F+rskMN2feKhRoaMuz4AsPB7VAAOtoMg In-Reply-To: Message-Id: X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: RE: RE: G0MRF transmitter problems- investigations (long!) Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Jim Very interesting, nice to have a man who knows his onions looking over the circuit! My original design used a piece of thick screened multicore cable for the transformer windings, primary was the screen, secondary was the inner cores in series. This should have given my transformer very low leakage inductance and it worked very well (and still does on my 2kW version) into my LPF at 200kHz, which seemed to give a happy coincidence of resonances. Incidentally I later discovered that the Ropex used exactly the same filter values...! I had no problems with the low voltage version using this construction, maybe I should have stuck to it with the high voltage version but I worried about voltage rating of the cable. I have always wondered about the decoupling of the centre tap, sometimes it seems to help and sometimes it doesn't, all down to transformer construction I suppose. 73 Dave G3YXM. -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of James Moritz Sent: 12 May 2004 12:19 To: rsgb_lf_group@blacksheep.org Subject: LF: RE: G0MRF transmitter problems- investigations (long!) Dear LF Group, I built one of the G0MRF TX boards a few years back, with the intention of using it for /P operation, but other things have prevented me doing that yet... Reading about PA4VHF's problems persuaded me to try running my board at full output. I found I had similar problems to the ones Dick describes - the DC supply current was rather high, and components got hot, especially the output transformer. Increasing the DC input to more than about 100W led to things getting excessively hot. My board is quite faithful to the original G0MRF article, using the 2x 42mm 3C85 toroid cores, which made it unlikely that Dick's LOPT core was the source of the trouble. Although these salvaged cores are not an exact equivalent, the ferrite material and the other core parameters are certainly very similar, so one can expect very similar performance..... From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 56395 invoked from network); 12 May 2004 19:47:11 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 12 May 2004 19:47:11 -0000 Received: (qmail 89263 invoked from network); 12 May 2004 19:47:11 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 12 May 2004 19:47:10 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BNzh8-000N6B-2m for dave@picks.force9.co.uk; Wed, 12 May 2004 19:47:10 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BNzgc-00054x-Ln for rs_out_1@blacksheep.org; Wed, 12 May 2004 20:46:38 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BNzgc-00054h-69 for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 20:46:38 +0100 Received: from postbode02.zonnet.nl ([62.58.50.89]) by relay.salmark.net with esmtp (Exim 4.24) id 1BO6F0-0004tz-Ic for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 03:46:34 +0100 Received: (qmail 10334 invoked by uid 10); 12 May 2004 19:08:33 -0000 Received: (vexira-qq 10300-38421C7 invoked from network) 12 May 2004 21:08:32 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.191.81]) (envelope-sender ) by postbode02.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 12 May 2004 19:08:32 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <003201c43853$22110bc0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 May 2004 20:57:27 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.60; host: postbode02.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: G0MRF-TX output transformer Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Well, at least I got a lot of good info from several of you, thanks! Ouput phasing etc, I am really questioning if I'm doing it wrong or right. I made the transformer exactly as it is in the schematic. That means centre tap in the mid, and then 5 turns to one side and 5 turns to the other side. So the 2 parts of the primairy coil are not in phase fed. So FET's are in opposite phase......... Also the secundairy coil is not wound on top (so covering) of the primairy, but at the other leg of the core. I now go changing my coil again, and so some further tests on it. 73 Dick From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 56046 invoked from network); 12 May 2004 21:07:53 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 12 May 2004 21:07:53 -0000 Received: (qmail 23854 invoked from network); 12 May 2004 21:07:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 12 May 2004 21:07:52 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BO0xE-000654-4n for dave@picks.force9.co.uk; Wed, 12 May 2004 22:07:52 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BO0wM-0006yW-2j for rs_out_1@blacksheep.org; Wed, 12 May 2004 22:06:58 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BO0wL-0006yN-AO for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 22:06:57 +0100 Received: from postbode01.zonnet.nl ([62.58.50.88]) by relay.salmark.net with esmtp (Exim 4.24) id 1BO7Uj-00055Z-Fj for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 05:06:53 +0100 Received: (qmail 7272 invoked by uid 10); 12 May 2004 20:46:48 -0000 Received: (vexira-qq 07149-A6C86955 invoked from network) 12 May 2004 22:46:43 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.248]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 12 May 2004 20:46:43 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000501c43860$d89cff40$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 May 2004 22:35:50 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.60; host: postbode01.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: some more on the TX-problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Just did some more tests........... Used another type of core, 3C11 Same problem is still there; tried to damp with 1nF+22 Ohm serie, doesn't help. Tried other phasing......didn't work either. I am using IRFP360, maybe that's the problem? (Rds on 0.2 Ohm) When I switch TX on , but without voltage on the FET's, I still see the same but of course much weaker on the output, before the low pass filter. What I see is only even harmonics, I can not see 136 or the odd harmics. When measuring at the gates of the FET's I can clearly see 136kHz and all it's odd and even products in about same strength. It looks as if it has something to do with the combination of the 2 FET's together with a coil as load. Maybe I'm running wrong FET's (IRFP360) I will put it to rest now......hope to have more luck in the coming weeks. 73 Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 96474 invoked from network); 12 May 2004 21:32:33 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore01.plus.net with SMTP; 12 May 2004 21:32:33 -0000 Received: (qmail 21221 invoked from network); 12 May 2004 21:32:32 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 12 May 2004 21:32:27 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BO1L1-000530-Dz for dave@picks.force9.co.uk; Wed, 12 May 2004 22:32:27 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BO1K8-0007GP-Ql for rs_out_1@blacksheep.org; Wed, 12 May 2004 22:31:32 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BO1K5-0007GG-UK for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 22:31:30 +0100 Received: from web5-rme.xtra.co.nz ([210.86.15.245]) by relay.salmark.net with esmtp (Exim 4.24) id 1BO7sT-00057h-Rc for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 05:31:26 +0100 Received: from web4-rme.xtra.co.nz ([210.86.15.143]) by web5-rme.xtra.co.nz with ESMTP id <20040512213114.PDJN12816.web5-rme.xtra.co.nz@web4-rme.xtra.co.nz> for ; Thu, 13 May 2004 09:31:14 +1200 X-Fake-Domain: bob2l2u6k2n1g3 Received: from bob2l2u6k2n1g3 ([219.89.176.229]) by web4-rme.xtra.co.nz with SMTP id <20040512213113.FVAK12806.web4-rme.xtra.co.nz@bob2l2u6k2n1g3> for ; Thu, 13 May 2004 09:31:13 +1200 X-Bad-Message-ID: no DNS (bob2l2u6k2n1g3) Message-ID: <000d01c43868$7458fe00$e901a8c0@bob2l2u6k2n1g3> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <000501c43860$d89cff40$2102000a@ibm> Date: Thu, 13 May 2004 09:31:12 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: some more on the TX-problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Dick, > I will put it to rest now......hope to have more luck in the coming weeks. > > 73 > > Dick, pa4vhf Just a thought, how about considering another call sign, as you obviously want a PA for LF ;-) 73, Bob ZL2CA From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 81970 invoked from network); 12 May 2004 21:36:38 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 12 May 2004 21:36:38 -0000 Received: (qmail 51226 invoked from network); 12 May 2004 21:36:37 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 12 May 2004 21:36:36 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BO1P2-000DCf-SB for dave@picks.force9.co.uk; Wed, 12 May 2004 21:36:36 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BO1Or-0007OP-Mh for rs_out_1@blacksheep.org; Wed, 12 May 2004 22:36:25 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BO1Or-0007OG-6h for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 22:36:25 +0100 Received: from postbode01.zonnet.nl ([62.58.50.88]) by relay.salmark.net with esmtp (Exim 4.24) id 1BO7xF-00058B-Iv for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 05:36:21 +0100 Received: (qmail 23168 invoked by uid 10); 12 May 2004 21:14:21 -0000 Received: (vexira-qq 23008-9ED48AE1 invoked from network) 12 May 2004 23:14:16 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.143]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 12 May 2004 21:14:16 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000b01c43864$b1bc28c0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 May 2004 23:03:22 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.61; host: postbode01.zonnet.nl) X-Spam-Score: 2.3 (++) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,PLING_PLING=1.325,RCVD_IN_SORBS=0.1 Subject: LF: output transfomer--BINGO!!!! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.2 required=5.0 tests=FROM_ENDS_IN_NUMS,PLING_PLING autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Well, thanks to that single sentence from Laurence in his last posting I finally got out of the nasty problem! "as long as the coil wind direction doesn't change at the tap point" and, suddenly I realized that it DID change in direction. So, I imidiatly changed one half of the test coil, and voila it worked! Less current, more output, and les harmonics. Second harmonic seems to be very strong effected by the (470nF) capacitor at the tappoint. When adding extra capacitors there is a point where it is optimal rejected. Thanks so much Laurence! Hopefuly I'm back on the right way now....... 73 Dick, pa4vhf (now going to bed...and dreaming about more power, hihi) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 97710 invoked from network); 12 May 2004 22:07:18 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore02.plus.net with SMTP; 12 May 2004 22:07:18 -0000 Received: (qmail 62345 invoked from network); 12 May 2004 22:07:18 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 May 2004 22:07:17 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BO1sj-000G6G-BF for dave@picks.force9.co.uk; Wed, 12 May 2004 22:07:17 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BO1sK-00085t-Bl for rs_out_1@blacksheep.org; Wed, 12 May 2004 23:06:52 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BO1sJ-00085k-T7 for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 23:06:51 +0100 Received: from mail.libertysurf.net ([213.36.80.91]) by relay.salmark.net with esmtp (Exim 4.24) id 1BO8Qi-0005Am-DN for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 06:06:48 +0100 X-Fake-Domain: jeff Received: from jeff (213.36.67.237) by mail.libertysurf.net (6.5.036) id 40A1E8E200149521 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 00:06:43 +0200 X-Bad-Message-ID: no DNS (jeff) Message-ID: <006e01c4386d$7f076bc0$a24124d5@jeff> From: "F6CWN" To: rsgb_lf_group@blacksheep.org References: <000b01c43864$b1bc28c0$2102000a@ibm> Date: Wed, 12 May 2004 22:04:42 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 X-Spam-Score: 2.5 (++) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,PLING_PLING=1.325,RCVD_IN_SORBS=0.1 Subject: LF: Re: output transfomer--BINGO!!!! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=MAILTO_TO_SPAM_ADDR, PLING_PLING autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 12./05/2004 2200z Hello Dick! Congratulations! And thanks to all for the help to my friend! 73: Jeff / F6CWN ----- Original Message ----- From: "Dick" To: Sent: Wednesday, May 12, 2004 9:03 PM Subject: LF: output transfomer--BINGO!!!! > Well, thanks to that single sentence from Laurence in his last > posting I finally got out of the nasty problem! > > "as long as the coil wind direction doesn't change at the tap point" > > and, suddenly I realized that it DID change in direction. > So, I imidiatly changed one half of the test coil, and voila it worked! > Less current, more output, and les harmonics. > Second harmonic seems to be very strong effected by the (470nF) > capacitor at the tappoint. > When adding extra capacitors there is a point where it is optimal rejected. > > Thanks so much Laurence! > > Hopefuly I'm back on the right way now....... > > 73 Dick, pa4vhf (now going to bed...and dreaming about more power, hihi) > > > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 64749 invoked from network); 12 May 2004 22:45:33 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 12 May 2004 22:45:33 -0000 Received: (qmail 34951 invoked from network); 12 May 2004 22:45:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 12 May 2004 22:45:32 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BO2Tk-0008yU-9e for dave@picks.force9.co.uk; Wed, 12 May 2004 22:45:32 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BO2TC-0000b9-N0 for rs_out_1@blacksheep.org; Wed, 12 May 2004 23:44:58 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BO2TB-0000b0-Vb for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 23:44:58 +0100 Received: from bay12-f73.bay12.hotmail.com ([64.4.35.73] helo=hotmail.com) by relay.salmark.net with esmtp (Exim 4.24) id 1BO91Z-0005EM-MF for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 06:44:53 +0100 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Wed, 12 May 2004 15:33:31 -0700 Received: from 24.116.116.38 by by12fd.bay12.hotmail.msn.com with HTTP; Wed, 12 May 2004 22:33:31 GMT X-Originating-IP: [24.116.116.38] X-Originating-Email: [hellozerohellozero@hotmail.com] X-Sender: hellozerohellozero@hotmail.com From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Wed, 12 May 2004 14:33:31 -0800 Mime-Version: 1.0 Message-ID: X-OriginalArrivalTime: 12 May 2004 22:33:31.0298 (UTC) FILETIME=[272DA820:01C43871] X-Spam-Score: 2.4 (++) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,PLING_PLING=1.325 Subject: RE: LF: output transfomer--BINGO!!!! Content-Type: text/plain; charset=windows-1252; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=MAILTO_TO_SPAM_ADDR, PLING_PLING autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Been there, done that!! >From: "Dick" >Reply-To: rsgb_lf_group@blacksheep.org >To: >Subject: LF: output transfomer--BINGO!!!! >Date: Wed, 12 May 2004 23:03:22 +0200 > >Well, thanks to that single sentence from Laurence in his last >posting I finally got out of the nasty problem! > >"as long as the coil wind direction doesn't change at the tap point" > >and, suddenly I realized that it DID change in direction. >So, I imidiatly changed one half of the test coil, and voila it worked! >Less current, more output, and les harmonics. >Second harmonic seems to be very strong effected by the (470nF) >capacitor at the tappoint. >When adding extra capacitors there is a point where it is optimal rejected. > >Thanks so much Laurence! > >Hopefuly I'm back on the right way now....... > >73 Dick, pa4vhf (now going to bed...and dreaming about more power, hihi) > > > > _________________________________________________________________ Is your PC infected? Get a FREE online computer virus scan from McAfee® Security. http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 76519 invoked from network); 12 May 2004 22:58:48 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 12 May 2004 22:58:48 -0000 Received: (qmail 70461 invoked from network); 12 May 2004 22:58:48 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 12 May 2004 22:58:46 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BO2gX-000I3H-TX for dave@picks.force9.co.uk; Wed, 12 May 2004 22:58:45 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BO2gC-0000zt-LB for rs_out_1@blacksheep.org; Wed, 12 May 2004 23:58:24 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BO2gC-0000zk-7o for rsgb_lf_group@blacksheep.org; Wed, 12 May 2004 23:58:24 +0100 Received: from mta207-rme.xtra.co.nz ([210.86.15.118]) by relay.salmark.net with esmtp (Exim 4.24) id 1BO9Ea-0005FJ-57 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 06:58:20 +0100 Received: from mta2-rme.xtra.co.nz ([210.86.15.140]) by mta207-rme.xtra.co.nz with ESMTP id <20040512225811.CMJT198.mta207-rme.xtra.co.nz@mta2-rme.xtra.co.nz> for ; Thu, 13 May 2004 10:58:11 +1200 X-Fake-Domain: bob2l2u6k2n1g3 Received: from bob2l2u6k2n1g3 ([219.89.176.229]) by mta2-rme.xtra.co.nz with SMTP id <20040512225806.HLXW6243.mta2-rme.xtra.co.nz@bob2l2u6k2n1g3> for ; Thu, 13 May 2004 10:58:06 +1200 X-Bad-Message-ID: no DNS (bob2l2u6k2n1g3) Message-ID: <002801c43874$978e8c80$e901a8c0@bob2l2u6k2n1g3> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: Date: Thu, 13 May 2004 10:58:03 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: VO1NA Schedule Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Joe, I've had a look for your beacon since 11 May, and also one previous occasion, but got nil results so far. The path to ZL has around 2 hours of darkness, starting from our sunset and ending with your sunrise. It seems the duration of darkness on the path does not change much over the year, but more investigation is needed to comment in more detail. 73, Bob ZL2CA > Dear Group, > > For those of you who are interested, I will be on the air again > starting tonight at 0000 UTC 11 May on 137.7770 kHz. 100 watts, 1.6 amps > to a 100 metre sloping wire. QRSS30 on the hour, 3.5 minutes of silence > then ID at 5 WPM until the next hour, 24 hours/day. > > > Cheers > Joe From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 42294 invoked from network); 13 May 2004 07:52:50 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore01.plus.net with SMTP; 13 May 2004 07:52:50 -0000 Received: (qmail 48115 invoked from network); 13 May 2004 07:52:49 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 13 May 2004 07:52:47 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BOB1K-000C3N-Mi for dave@picks.force9.co.uk; Thu, 13 May 2004 08:52:46 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOB06-0003gi-VT for rs_out_1@blacksheep.org; Thu, 13 May 2004 08:51:30 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOB06-0003gZ-Gk for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 08:51:30 +0100 Received: from nibbel.kulnet.kuleuven.ac.be ([134.58.240.41]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOHYU-0005tD-KN for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 15:51:26 +0100 Received: from localhost (localhost [127.0.0.1]) by nibbel.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 79E4C4B478 for ; Thu, 13 May 2004 09:51:21 +0200 (CEST) Received: from antonius.kulnet.kuleuven.ac.be (antonius.kulnet.kuleuven.ac.be [134.58.240.73]) by nibbel.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 022E64B491 for ; Thu, 13 May 2004 09:51:21 +0200 (CEST) X-Fake-Domain: dell-rik.fys.kuleuven.ac.be Received: from dell-rik.fys.kuleuven.ac.be (pc-10-33-165-177.fys.kuleuven.ac.be [10.33.165.177]) by antonius.kulnet.kuleuven.ac.be (Postfix) with ESMTP id CD9074C2C5 for ; Thu, 13 May 2004 09:51:20 +0200 (CEST) Message-Id: <5.1.0.14.0.20040513093940.00ba1718@u0019445.kuleuven.be> X-Sender: u0019445@u0019445.kuleuven.be X-Mailer: QUALCOMM Windows Eudora Version 5.1 Date: Thu, 13 May 2004 09:56:54 +0200 To: rsgb_lf_group@blacksheep.org From: Rik Strobbe In-Reply-To: <40A2578C.2080600@usa.net> Mime-Version: 1.0 X-Virus-Scanned: by KULeuven Antivirus Cluster X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: VDC source with microvolt resolution Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Hi Alberto, If you (or your company) can spend some money on it you could consider buying a ultra-stable voltage/current source such as Analogic Model 8200 (http://www.analogic.com/Level4/TM4/8200.pdf). An alternative route : in the early days, when anything above 12 bit DAC's were hard to find and very expensive, I built a pretty good DAC using a stable voltage source and PWM-ing that. After good filtering of the output signal I got 15 bit accuracy. Accuracy was mainly determined by the drift of the opamps, but todays state-of-the-art opamps should have much less drift than those of 20 years ago. Or : try something with one of these 24 bit audio DAC's such as AD1955, they are cheap (< 10 Euro) and if you ask very nice they even send samples. 73, Rik At 18:57 12/05/2004 +0200, you wrote: >I wonder if someone on this list has already had a problem similar >to this, and has found a simple solution. > >Problem: >I have a super-filtered and stable DC voltage of about 8V. >I need to make it variable (with negligible current requirements) >from abt 0 to abt 8V, with a minimum step size of abt 10 uV. >I can use part of the processing power of an AVR microcontroller >for this task. One solution that comes immediately to the mind is >to use a 20-bit DAC, fed somehow with that stable voltage, but I am >in search of something that doesn't need hard-to-find components. > >I played with the idea of a charge pump, where you control with >a couple of output bits of a port of the micro the charge and discharge >of a capacitor for variable lenghts of time, so to achieve the wanted >result, but I am unsure of the implementation details. The response time >requirements are very relaxed, there will be an adjustment of that >voltage let's say once every two minutes or more. > >Has anybody suggestions or links ? Many thanks > >73 Alberto I2PHD > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 49292 invoked from network); 13 May 2004 11:33:36 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 13 May 2004 11:33:36 -0000 Received: (qmail 48218 invoked from network); 13 May 2004 11:33:36 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 13 May 2004 11:33:35 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BOET0-000CHv-TW for dave@picks.force9.co.uk; Thu, 13 May 2004 12:33:34 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOESa-0008Qy-KR for rs_out_1@blacksheep.org; Thu, 13 May 2004 12:33:08 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOESZ-0008Qp-R2 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 12:33:07 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOL0y-0006Jy-7E for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 19:33:04 +0100 X-Fake-Domain: altair Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1BOEQJ-0004JK-00 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 12:30:47 +0100 X-No-DNS-For: 147.197.164.230 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1BOEQI-0007WJ-00 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 12:30:46 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Thu, 13 May 2004 12:30:42 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-UH-MailScanner: No Virus detected X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: RE: Re: VDC source with microvolt resolution Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 >.....This is more or less what I had in mind when I wrote of a charge pump. >The AVR micro I am using offers a >PWM output, but unfortunately it has a resolution of only ten bits, so >it must be done in software. Dear Alberto, LF Group, How about this - generate your output DC voltage using the 10 bit PWM. Additionally, have an external 10 bit DAC, driven from the reference voltage source used by the PWM. Attenuate the DAC output by a factor of 1/(2^10)(or whatever factor gives a full-scale output equal to a 1 LSB change in the PWM output), and sum it with the PWM output to interpolate with 10 bit resolution between the "coarse" PWM output steps. I think it would be quite easy to get 20bit resolution like this, but 20 bit accuracy would be another problem... Another thought occurs - implement a software DDS with 20bit phase accumulator, then use the output to drive a frequency to voltage converter (essentially a pulse generator or charge pump with a low pass filter). One problem there would be the output ripple at low voltage outputs. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 14620 invoked from network); 13 May 2004 13:43:12 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 13 May 2004 13:43:12 -0000 Received: (qmail 88850 invoked from network); 13 May 2004 13:43:11 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 13:43:09 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOGUP-000Mrw-7D for dave@picks.force9.co.uk; Thu, 13 May 2004 13:43:09 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOGTe-0002lv-Ji for rs_out_1@blacksheep.org; Thu, 13 May 2004 14:42:22 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOGTe-0002lm-4T for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 14:42:22 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BON21-0006XT-L4 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 21:42:17 +0100 X-Fake-Domain: altair Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1BOGTA-0004fK-00 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 14:41:52 +0100 X-No-DNS-For: 147.197.164.230 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1BOGT9-0004aO-00 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 14:41:51 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Thu, 13 May 2004 14:41:50 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-UH-MailScanner: No Virus detected X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: VO1NA and G3NYK Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dear Joe, Alan, LF Group, VO1NA was quite good here last night from around 0100 - 0430, with "O" copy apart from a period of QSB around 0300. The general noise level has crept up several dB from last month, towards "summer" conditions. Also, 1Hz below Joe I saw QRSS30 beacon sigs from G3NYK - I guess a low-power signal source was in use. Nice to finally see you on the air Alan! Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 3261 invoked from network); 13 May 2004 14:43:40 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 13 May 2004 14:43:40 -0000 Received: (qmail 2007 invoked from network); 13 May 2004 14:43:40 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 14:43:38 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOHQw-0000Ir-5m for dave@picks.force9.co.uk; Thu, 13 May 2004 14:43:38 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOHQR-00049Z-DI for rs_out_1@blacksheep.org; Thu, 13 May 2004 15:43:07 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOHQQ-00049Q-LC for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 15:43:06 +0100 Received: from mailfe05.swip.net ([212.247.154.129]) by relay.salmark.net with esmtp (Exim 4.24) id 1BONyn-0006fe-0M for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 22:43:01 +0100 X-T2-Posting-ID: 3bgU4LVfFOB/SKpu7D1OzA== Received: from [212.151.18.81] (HELO oemcomputer) by mailfe05.swip.net (CommuniGate Pro SMTP 4.2b4a) with SMTP id 39076081 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 16:43:00 +0200 X-Bad-Message-ID: no DNS (oemcomputer) Message-ID: <003301c438f8$97eaaa40$511297d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <40A2578C.2080600@usa.net> Date: Thu, 13 May 2004 14:42:30 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: VDC source with microvolt resolution Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Alberto, Jim mentioned using a DAC to interpolate between the PWM steps. The interpolation can also be done by "PWMing the PWM" between two adjacent PWM steps (sort of "controlled dithering" :-). 1024 main PWM cycles = 1 sub-PWM cycle. For example, if the MSWord = 705 and the LSWord = 442 (10-bit words) then the main PWM should be set to 706 for 442 of the PWM cycles and to 705 for the remaining 1024-442=582 cycles. I recall we discussed this approach for VCXO control some time ago. The downside is that the output signal will contain frequency components as low as the main PWM frequency divided by the sub-PWM resolution so you'll need a very "slow" lowpass filter to get rid of the ripple. A DC accurate multi-pole filter with good (perhaps chopper stabilised) op-amps should do the trick. 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 92817 invoked from network); 13 May 2004 15:17:55 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 13 May 2004 15:17:55 -0000 Received: (qmail 35804 invoked from network); 13 May 2004 15:17:55 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 13 May 2004 15:17:53 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BOHy5-000987-37 for dave@picks.force9.co.uk; Thu, 13 May 2004 16:17:53 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOHxs-0004tz-BX for rs_out_1@blacksheep.org; Thu, 13 May 2004 16:17:40 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOHxr-0004tq-TS for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 16:17:39 +0100 Received: from sterling.noc-servers.net ([69.93.216.2]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOOWA-0006lZ-5S for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 23:17:30 +0100 Received: from danton-2-81-57-233-115.fbx.proxad.net ([81.57.233.115] helo=parissn2) by sterling.noc-servers.net with asmtp (Exim 4.34) id 1BOHxd-0001FP-SU for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 11:17:26 -0400 X-Bad-Message-ID: no DNS (parissn2) Message-ID: <007901c438fd$7c478600$0702a8c0@parissn2> From: "Stewart Nelson" To: rsgb_lf_group@blacksheep.org References: <40A2578C.2080600@usa.net> <003301c438f8$97eaaa40$511297d4@oemcomputer> Date: Thu, 13 May 2004 17:18:01 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - sterling.noc-servers.net X-AntiAbuse: Original Domain - blacksheep.org X-AntiAbuse: Originator/Caller UID/GID - [0 0] / [47 12] X-AntiAbuse: Sender Address Domain - scgroup.com X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: Re: VDC source with microvolt resolution Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Alberto, The filtering requirements are less onerous if the dithering frequency components are maximized, e.g. by a DDA algorithm. In Johan's example, add 442 to a variable each main PWM cycle. If the result is less than 1024, send 705 to the PWM. Otherwise, send 706 and subtract 1024 from the variable. This results in a sequence of 705, 705, 706, 705, 706, 705, etc. 73, Stewart KK7KA ----- Original Message ----- From: "Johan Bodin" To: Sent: Thursday, May 13, 2004 4:42 PM Subject: LF: Re: VDC source with microvolt resolution Hi Alberto, Jim mentioned using a DAC to interpolate between the PWM steps. The interpolation can also be done by "PWMing the PWM" between two adjacent PWM steps (sort of "controlled dithering" :-). 1024 main PWM cycles = 1 sub-PWM cycle. For example, if the MSWord = 705 and the LSWord = 442 (10-bit words) then the main PWM should be set to 706 for 442 of the PWM cycles and to 705 for the remaining 1024-442=582 cycles. I recall we discussed this approach for VCXO control some time ago. The downside is that the output signal will contain frequency components as low as the main PWM frequency divided by the sub-PWM resolution so you'll need a very "slow" lowpass filter to get rid of the ripple. A DC accurate multi-pole filter with good (perhaps chopper stabilised) op-amps should do the trick. 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 73331 invoked from network); 13 May 2004 15:22:39 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 13 May 2004 15:22:39 -0000 Received: (qmail 23342 invoked from network); 13 May 2004 15:22:39 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 15:22:37 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOI2f-0005oC-DP for dave@picks.force9.co.uk; Thu, 13 May 2004 15:22:37 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOI2N-00058h-Ne for rs_out_1@blacksheep.org; Thu, 13 May 2004 16:22:19 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOI2N-00058Y-Ac for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 16:22:19 +0100 Received: from salador.ucs.mun.ca ([134.153.232.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOOaf-0006mX-BX for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 23:22:09 +0100 Received: from plato.ucs.mun.ca (root@plato.ucs.mun.ca [134.153.232.151]) by salador.ucs.mun.ca (8.12.9p2/8.12.9) with ESMTP id i4DFLwEK036721 for ; Thu, 13 May 2004 12:51:59 -0230 (NDT) (envelope-from jcraig@morgan.ucs.mun.ca) Received: from plato.ucs.mun.ca (jcraig@localhost [127.0.0.1]) by plato.ucs.mun.ca (8.12.3p2/8.12.3) with ESMTP id i4DFLdgj025642 for ; Thu, 13 May 2004 12:51:58 -0230 (NDT) Received: (from jcraig@localhost) by plato.ucs.mun.ca (8.12.3p2/8.12.1/Submit) id i4DFLd1c018655; Thu, 13 May 2004 12:51:39 -0230 (NDT) Date: Thu, 13 May 2004 12:51:39 -0230 (NDT) From: Joe Craig X-X-Sender: jcraig@plato.ucs.mun.ca To: rsgb_lf_group@blacksheep.org In-Reply-To: <002801c43874$978e8c80$e901a8c0@bob2l2u6k2n1g3> Message-ID: References: <002801c43874$978e8c80$e901a8c0@bob2l2u6k2n1g3> MIME-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Re: VO1NA Schedule Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Hello Bob. Nice to hear from you. Thank-you for looking for my signals. The best DX with my 100 watts so far has been to RN6BN at 6600 km or about 1/3 the distance to the antipodes. With winter approaching you, perhaps QRN will be lower and under favourable conditions you might be able to copy my signals. Do you think we could improve the odds by using a longer dot? I could arrange to send "NA" at dot 120 during the hours of common darkness if you thought it would be useful. Cheers Joe From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 77995 invoked from network); 13 May 2004 15:36:47 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 13 May 2004 15:36:47 -0000 Received: (qmail 51598 invoked from network); 13 May 2004 15:36:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 13 May 2004 15:36:38 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BOIGC-000Cfq-Nu for dave@picks.force9.co.uk; Thu, 13 May 2004 15:36:38 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOIFc-0005Zj-Hz for rs_out_1@blacksheep.org; Thu, 13 May 2004 16:36:00 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOIFc-0005Za-59 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 16:36:00 +0100 Received: from cmsrelay02.mx.net ([165.212.11.111]) by relay.salmark.net with smtp (Exim 4.24) id 1BOOnt-0006o4-4g for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 23:35:49 +0100 Received: from uadvg130.cms.usa.net (165.212.11.130) by cmsoutbound.mx.net with SMTP; 13 May 2004 15:35:43 -0000 Received: from usa.net [151.41.143.11] by uadvg130.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.13N) with ESMTP id 685iemPjO0228M30; Thu, 13 May 2004 15:35:41 GMT X-USANET-Auth: 151.41.143.11 AUTH dibene@usa.net usa.net Message-ID: <40A395D3.80409@usa.net> Date: Thu, 13 May 2004 17:35:47 +0200 From: Alberto di Bene User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <40A2578C.2080600@usa.net> <003301c438f8$97eaaa40$511297d4@oemcomputer> <007901c438fd$7c478600$0702a8c0@parissn2> In-Reply-To: <007901c438fd$7c478600$0702a8c0@parissn2> X-Spam-Score: 2.8 (++) X-Spam-Report: autolearn=no,FAKE_HELO_USA_NET=2.8 Subject: LF: Re: VDC source with microvolt resolution Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Hi Stewart, another interesting suggestion to add to the "bag of tricks" for this project ! Thanks. 73 Alberto I2PHD ------------------------------ Stewart Nelson wrote: >Hi Alberto, > >The filtering requirements are less onerous if the >dithering frequency components are maximized, e.g. by >a DDA algorithm. In Johan's example, add 442 to a >variable each main PWM cycle. If the result is less >than 1024, send 705 to the PWM. Otherwise, send 706 >and subtract 1024 from the variable. This results >in a sequence of 705, 705, 706, 705, 706, 705, etc. > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4810 invoked from network); 13 May 2004 17:32:48 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 13 May 2004 17:32:48 -0000 Received: (qmail 9241 invoked from network); 13 May 2004 17:32:46 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 13 May 2004 17:32:33 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BOK4P-0001Kw-OZ for dave@picks.force9.co.uk; Thu, 13 May 2004 17:32:33 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOK3f-0007pU-5c for rs_out_1@blacksheep.org; Thu, 13 May 2004 18:31:47 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOK3e-0007pL-LV for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 18:31:46 +0100 Received: from smtp06.freeler.nl ([213.218.75.235]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOQc0-00070l-SN for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 01:31:40 +0100 Received: (qmail 19069 invoked from network); 13 May 2004 17:31:40 -0000 X-Fake-Domain: unknown Received: from unknown (HELO w8k3f0.freeler.nl) ([62.21.144.169]) (envelope-sender ) by smtp06.freeler.nl (qmail-ldap-1.03) with SMTP for ; 13 May 2004 17:31:39 -0000 Message-Id: <6.1.0.6.2.20040513192931.03b81eb0@POP3.freeler.nl> X-Sender: FRE0000086604@POP3.freeler.nl (Unverified) X-Mailer: QUALCOMM Windows Eudora Version 6.1.0.6 Date: Thu, 13 May 2004 19:31:29 +0200 To: rsgb_lf_group@blacksheep.org From: Dick Rollema In-Reply-To: References: Mime-Version: 1.0 X-Spam-Score: 1.1 (+) X-Spam-Report: autolearn=no,HTML_30_40=0.809,HTML_FONTCOLOR_BLUE=0.1,HTML_FONT_BIG=0.1,HTML_MESSAGE=0.001,RCVD_IN_SORBS=0.1 Subject: =?iso-8859-1?Q?Re:_LF:_RE:_LF:_RE:_Attn._PA=F8SE?= Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.0 required=5.0 tests=HTML_30_40,HTML_FONTCOLOR_BLUE, HTML_FONT_BIG,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Dear Jan-Martin,

You can use either d.w.rollema@freeler.nl or pa0se@amsat.org.

73, Dick, PA0SE
 
At 21:18 12-5-04, you wrote:
Dick,
would you pls send me a mail, I've lost your email address, and the two PC's at home has broken down (harddisk crash)
 
73
Jan-Martin

---
J M Nøding, Datakvalitet, TTS, Kristiansand
-----Original Message-----
From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org]On Behalf Of Dick Rollema
Sent: 20. februar 2004 10:31
To: rsgb_lf_group@blacksheep.org
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 48173 invoked from network); 13 May 2004 18:53:39 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 13 May 2004 18:53:39 -0000 Received: (qmail 63414 invoked from network); 13 May 2004 18:53:38 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 18:53:37 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOLKq-000GBV-Oq for dave@picks.force9.co.uk; Thu, 13 May 2004 18:53:36 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOLK7-0001V4-9w for rs_out_1@blacksheep.org; Thu, 13 May 2004 19:52:51 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOLK6-0001Uv-Kk for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 19:52:50 +0100 Received: from smtp801.mail.ukl.yahoo.com ([217.12.12.138]) by relay.salmark.net with smtp (Exim 4.24) id 1BORsU-00077v-9O for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 02:52:46 +0100 X-Fake-Domain: unknown Received: from unknown (HELO Main) (rsgb?lf?group@blacksheep.org@213.122.46.251 with poptime) by smtp801.mail.ukl.yahoo.com with SMTP; 13 May 2004 18:38:50 -0000 X-Bad-Message-ID: no DNS (Main) Message-ID: <000001c43919$8b690de0$6507a8c0@Main> From: "Alan Melia" To: "LF-Group" Date: Thu, 13 May 2004 19:38:05 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 X-Spam-Score: 0.5 (/) X-Spam-Report: autolearn=no,MANY_EXCLAMATIONS=0.394,RCVD_IN_SORBS=0.1 Subject: LF: WHOOPS !! Caught out !! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.4 required=5.0 tests=MANY_EXCLAMATIONS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi all, there I was playing away on the bench with a new toy....and gosh I get reports from Jim and an "M" report from Hartmut in Germany !! The toy was an Adret 201 synth generator 0 to 1.999,999MHz in 0.1Hz steps, OXCO controlled (or external reference). One nice facility is that the AM and FM modulation facility have a response down to DC, so I knocked up a little keyer on vero, hooked on to an external +&-12V PSU (it needs to swing to -12 to cut the carrier off.)and attached a small square of vero with a "test amp" on it. This has a BFY50 and a BSX30 in a kind of half bridge, and is a verson of an aerial test TX on Lyle Kohler's web site. The keying source is an old 80C85 "notebook", a NEC 8201, with a simple Basic program using the cassette motor switch (now there is something you dont get on PCs these days!!) as the keying contacts. The aerial is connected via a transformer wound on a small (20mm diam) ferrite from an old SMPSU. The receive aerial loading coil is a 1.25mH solenoid ( 6in long 28swg on 35mm waste pipe) tuned by stuffing a small fragment of ferrite rod in the end. The aerial current was measured using a Tek passive current probe P6021. The "PA" is running 24V at about 100mA and the aerial current is about 200mA, aerial efficiency is about 0.1% so it is about 2.5mW ERP. (Rtot aerial about 60ohm, and the capacity is about 850pF). This is a power level that could easily be achieved even in a small garden, or perhaps with a loop. I guess most of you thought it would never happen !! I did....I have a considerable amount to do yet to allow a two-way....I must find some more cornflakes boxes !! and some choc blocks. The unit is still running if anyone else wants to look for it. The frequency is 137.7760kHz. about.0.2Hz hf of a Loran line. The dot length is about 25secs.. Cheers de Alan G3NYK alan.melia@btinternet.com From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5524 invoked from network); 13 May 2004 19:41:51 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 13 May 2004 19:41:51 -0000 Received: (qmail 40533 invoked from network); 13 May 2004 19:41:50 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 19:41:47 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOM5T-000ADI-NL for dave@picks.force9.co.uk; Thu, 13 May 2004 19:41:47 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOM53-0002Su-NF for rs_out_1@blacksheep.org; Thu, 13 May 2004 20:41:21 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOM53-0002Sl-1p for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 20:41:21 +0100 Received: from cliff.concentric.net ([206.173.118.90]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOSdQ-0007D1-4P for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 03:41:16 +0100 X-Fake-Domain: JKA Received: from JKA (208.37.242.34.ptr.us.xo.net [208.37.242.34]) by cliff.concentric.net [Concentric SMTP Relay 1.1] id i4DJf6h08797 for ; Thu, 13 May 2004 15:41:06 -0400 (EDT) X-Bad-Message-ID: no DNS (JKA) Message-ID: <005101c43922$ea75da80$3401a8c0@JKA> From: "John Andrews" To: rsgb_lf_group@blacksheep.org References: <000001c43919$8b690de0$6507a8c0@Main> Date: Thu, 13 May 2004 15:45:56 -0400 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: 0.4 (/) X-Spam-Report: autolearn=no,MANY_EXCLAMATIONS=0.394 Subject: LF: Re: WHOOPS !! Caught out !! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.4 required=5.0 tests=MANY_EXCLAMATIONS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Alan, > Hi all, there I was playing away on the bench with a new toy....and gosh I > get reports from Jim and an "M" report from Hartmut in Germany !! >The dot length is about > 25secs.. No wonder I didn't see it! Kick it up to 27 seconds... John Andrews From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 35349 invoked from network); 13 May 2004 19:53:16 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 13 May 2004 19:53:16 -0000 Received: (qmail 26908 invoked from network); 13 May 2004 19:53:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 13 May 2004 19:53:10 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BOMGU-0006il-1x for dave@picks.force9.co.uk; Thu, 13 May 2004 19:53:10 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOMG2-0002p0-Kc for rs_out_1@blacksheep.org; Thu, 13 May 2004 20:52:42 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOMG2-0002or-90 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 20:52:42 +0100 Received: from hulk.vianw.pt ([195.22.31.43]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOSoQ-0007EZ-JV for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 03:52:38 +0100 X-Fake-Domain: Slave_13.esoterica.pt Received: from Slave_13.esoterica.pt (adsl-norte02-1-17.vianw.pt [80.172.144.17]) by hulk.vianw.pt (8.12.11/8.12.11) with ESMTP id i4DJqZnO007158 for ; Thu, 13 May 2004 20:52:35 +0100 Message-Id: <5.2.0.9.2.20040513194921.01e76e20@pop.vianw.pt> X-Sender: nx4ywv@pop.vianw.pt X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 Date: Thu, 13 May 2004 19:52:19 +0000 To: rsgb_lf_group@blacksheep.org From: Brian Rogerson In-Reply-To: <000001c43919$8b690de0$6507a8c0@Main> Mime-Version: 1.0 X-Spam-Score: 0.4 (/) X-Spam-Report: autolearn=no,MANY_EXCLAMATIONS=0.394 Subject: Re: LF: WHOOPS !! Caught out !! Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.4 required=5.0 tests=MANY_EXCLAMATIONS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit WELL DONE ALAN! I shall look very carefully at my grab now it is going dark. 73, Brian CT1DRP At 18:38 13/05/2004, you wrote: >Hi all, there I was playing away on the bench with a new toy....and gosh I From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 49260 invoked from network); 13 May 2004 20:04:58 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore03.plus.net with SMTP; 13 May 2004 20:04:58 -0000 Received: (qmail 15147 invoked from network); 13 May 2004 20:04:58 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 13 May 2004 20:04:54 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BOMRq-0003RZ-86 for dave@picks.force9.co.uk; Thu, 13 May 2004 21:04:54 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOMRB-00035d-RM for rs_out_1@blacksheep.org; Thu, 13 May 2004 21:04:13 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOMRA-00035U-VI for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 21:04:13 +0100 Received: from web5-rme.xtra.co.nz ([210.86.15.245]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOSzY-0007Kj-Nh for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 04:04:09 +0100 Received: from web1-rme.xtra.co.nz ([210.86.15.142]) by web5-rme.xtra.co.nz with ESMTP id <20040513200401.PFPA12816.web5-rme.xtra.co.nz@web1-rme.xtra.co.nz> for ; Fri, 14 May 2004 08:04:01 +1200 X-Fake-Domain: quaycustomer Received: from quaycustomer ([219.89.176.229]) by web1-rme.xtra.co.nz with SMTP id <20040513200400.LWPT28380.web1-rme.xtra.co.nz@quaycustomer> for ; Fri, 14 May 2004 08:04:00 +1200 X-Bad-Message-ID: no DNS (quaycustomer) Message-ID: <005f01c43927$ea2c5c20$c401a8c0@quaycustomer> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <002801c43874$978e8c80$e901a8c0@bob2l2u6k2n1g3> Date: Fri, 14 May 2004 08:07:17 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Re: VO1NA Schedule Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Joe, I suggest you leave the schedule as published for the time being. Testing with QRSS30 is more realistic if the path is a contender for trying a two-way QSO. > .... With winter approaching you, > perhaps QRN will be lower and under favourable conditions > you might be able to copy my signals. ZL is classed as being in a "temperate climate". While I would take note of measured data, in the mean time my own opinion is that the LF QRN in ZL does not vary much with season, and that there can be low or high QRN nights any time of the year. What I would look for is the maximum duration dark path and that needs further study. It would be nice to have some software that calculated the duration rather than induvidual sunset and sunrise times. Nothing seen last night, and I'm away from home for the next two nights. When I say "night", it is the ZL early evening, so is fairly easy to arrange for monitoring DX signals coming from an easterly quarter. Monitoring signals from a westerly quarter are the "dawn breakers". 73, Bob ZL2CA From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 51020 invoked from network); 13 May 2004 20:43:07 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 13 May 2004 20:43:07 -0000 Received: (qmail 25468 invoked from network); 13 May 2004 20:43:06 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 13 May 2004 20:43:05 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BON2n-0006UW-JL for dave@picks.force9.co.uk; Thu, 13 May 2004 21:43:05 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BON2J-0003qW-HV for rs_out_1@blacksheep.org; Thu, 13 May 2004 21:42:35 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BON2J-0003qN-0v for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 21:42:35 +0100 Received: from mailfe04.swip.net ([212.247.154.97]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOTah-0007P1-3G for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 04:42:31 +0100 X-T2-Posting-ID: 3bgU4LVfFOB/SKpu7D1OzA== Received: from [212.151.19.172] (HELO oemcomputer) by mailfe04.swip.net (CommuniGate Pro SMTP 4.2b4a) with SMTP id 40447035 for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 22:42:30 +0200 X-Bad-Message-ID: no DNS (oemcomputer) Message-ID: <003d01c4392a$d0b5c6c0$ac1397d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: <40A2578C.2080600@usa.net> <003301c438f8$97eaaa40$511297d4@oemcomputer> <40A3913E.9000406@usa.net> Date: Thu, 13 May 2004 20:42:00 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: Re: VDC source with microvolt resolution Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Alberto, > It rests to see if the AT90S8535 (you know that, do you ? :-) allows this > "change over the nose" of the PWM limits fast enough to be effective. I can't see that as a problem. Timer1 overflow flag works in PWM mode too so it is possible to write an interrupt routine that is synchronized to the PWM cycle. Every time the ISR is fired, it reads the 20-bit value from a global and updates the 10-bit PWM control register with either N or N+1, according to the "sub-PWM" algorithm. I like Stewart's idea of maximizing the dither frequency by spreading the N+1 corrections all over the main PWM cycles but I don't know enough math for optimizing it. What if the value of the 10 LSBits is 1 for example? It cannot be spread out and there will be some some Fpwm/1024 frequency component (although very small). > Given that a correction does not happen more often than once every 30 > seconds, also the lowpass filtering of the control voltage should not be a great > problem (maybe). Assuming 8MHz clock on the '8535 (Yes, I know it :-), main PWM frequency is 3910 Hz max in 10-bit mode. Adding a 10-bit sub-PWM brings the lowest frequency component down to 3910/1024 = 3.8 Hz. A 3:rd order LPF with 0.3 Hz cut-off, or so, should be about 60 dB down at 4 Hz and still have a reasonably fast response. With more filter poles you should be able to put the cutoff "knee" closer to 3.8 Hz and get faster response without sacrificing "sub-PWM" ripple rejection. Maybe a Bessel response is preferable to avoid overshoot although Bessel has a very "lazy" roll-off compared to Butterworth et. al. 73 Johan SM6LKM From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22564 invoked from network); 13 May 2004 21:04:41 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 13 May 2004 21:04:41 -0000 Received: (qmail 48434 invoked from network); 13 May 2004 21:04:41 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 21:04:36 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BONNc-000CLQ-2w for dave@picks.force9.co.uk; Thu, 13 May 2004 21:04:36 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BONNA-0004iG-J8 for rs_out_1@blacksheep.org; Thu, 13 May 2004 22:04:08 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BONN9-0004i7-SW for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 22:04:07 +0100 Received: from cmsrelay02.mx.net ([165.212.11.111]) by relay.salmark.net with smtp (Exim 4.24) id 1BOTvX-0007Rn-M9 for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 05:04:03 +0100 Received: from uadvg128.cms.usa.net (165.212.11.128) by cmsoutbound.mx.net with SMTP; 13 May 2004 21:03:55 -0000 X-Fake-Domain: usa.net Received: from usa.net [151.41.143.11] by uadvg128.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.13N) with ESMTP id 305iemVD10306M28; Thu, 13 May 2004 21:03:52 GMT X-USANET-Auth: 151.41.143.11 AUTH dibene@usa.net usa.net Message-ID: <40A3E2BE.1010806@usa.net> Date: Thu, 13 May 2004 23:03:58 +0200 From: Alberto di Bene User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <40A2578C.2080600@usa.net> <003301c438f8$97eaaa40$511297d4@oemcomputer> <40A3913E.9000406@usa.net> <003d01c4392a$d0b5c6c0$ac1397d4@oemcomputer> In-Reply-To: <003d01c4392a$d0b5c6c0$ac1397d4@oemcomputer> X-Spam-Score: 2.8 (++) X-Spam-Report: autolearn=no,FAKE_HELO_USA_NET=2.8 Subject: LF: Re: VDC source with microvolt resolution Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Johan Bodin wrote: >I can't see that as a problem. Timer1 overflow flag works in PWM mode too >so it is possible to write an interrupt routine that is synchronized to the PWM >cycle. Every time the ISR is fired, it reads the 20-bit value from a global and >updates the 10-bit PWM control register with either N or N+1, according to >the "sub-PWM" algorithm. > > Hi Johan, you spared me compulsing the '8535 data sheet. It looks like it is quite feasible and with a minimal consumption of CPU time, thanks. >I like Stewart's idea of maximizing the dither frequency by spreading the N+1 >corrections all over the main PWM cycles but I don't know enough math for >optimizing it. What if the value of the 10 LSBits is 1 for example? It cannot >be spread out and there will be some some Fpwm/1024 frequency component >(although very small). > > The DDA algorithm mentioned by Stewart is what sometimes is used to draw lines on a display with a finite number of pixels. If the line is quite close to be horizontal (or vertical), you cannot avoid some more pronounced jagginess. The example you give, a 1 in the 10 LSBs, is conceptually similar to an almost horizontal line. It is a worst case situation and it must be accepted as such (unless Stewart has some more clever suggestions...) >Assuming 8MHz clock on the '8535 (Yes, I know it :-), main PWM frequency >is 3910 Hz max in 10-bit mode. Adding a 10-bit sub-PWM brings the lowest >frequency component down to 3910/1024 = 3.8 Hz. A 3:rd order LPF with >0.3 Hz cut-off, or so, should be about 60 dB down at 4 Hz and still have a >reasonably fast response. With more filter poles you should be able to put the >cutoff "knee" closer to 3.8 Hz and get faster response without sacrificing >"sub-PWM" ripple rejection. Maybe a Bessel response is preferable to >avoid overshoot although Bessel has a very "lazy" roll-off compared to >Butterworth et. al. > > Good. You analysis shows that what remains as a concern is only the noise. Anybody knows of an op-amp (readily available) better than the OP27, as far as noise is concerned ? TNX. 73 Alberto I2PHD From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 1126 invoked from network); 13 May 2004 21:22:38 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 13 May 2004 21:22:38 -0000 Received: (qmail 8646 invoked from network); 13 May 2004 21:22:38 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 21:22:37 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BONf3-00027e-5j for dave@picks.force9.co.uk; Thu, 13 May 2004 21:22:37 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BONeV-0005Cg-OM for rs_out_1@blacksheep.org; Thu, 13 May 2004 22:22:03 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BONeU-0005CX-9r for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 22:22:02 +0100 Received: from post.omnieng.co.uk ([193.82.59.20]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOUCs-0007TV-1i for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 05:21:58 +0100 Received: from bay12-f23.bay12.hotmail.com ([64.4.35.23] helo=hotmail.com) by post.omnieng.co.uk with esmtp (Exim 4.14) id 1BONeP-00076E-DZ for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 22:21:57 +0100 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Thu, 13 May 2004 14:21:19 -0700 Received: from 12.31.208.217 by by12fd.bay12.hotmail.msn.com with HTTP; Thu, 13 May 2004 21:21:19 GMT X-Originating-IP: [12.31.208.217] X-Originating-Email: [hellozerohellozero@hotmail.com] X-Sender: hellozerohellozero@hotmail.com From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Date: Thu, 13 May 2004 13:21:19 -0800 Mime-Version: 1.0 Message-ID: X-OriginalArrivalTime: 13 May 2004 21:21:19.0712 (UTC) FILETIME=[3BC3D600:01C43930] X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, X-SA-Exim-Rcpt-To: rsgb_lf_group@blacksheep.org Subject: Re: LF: Re: VO1NA Schedule Content-Type: text/plain; charset=windows-1252; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Ive just been running some stats for the forthcoming trip to Fiji (appx RH91EU) 18 deg 08 mins S 178 deg 20 mins E. It doesnt look good for July for Western Europe. Avg darkness is from 0629-1729Z and I dont see any paths - sorry. I have a small gray line to Eastern Europe (just) around 1841Z, and maybe just to CT1 at 0538Z - but these are really pushing it. North America looks a lot better of course and we just about have a path to Vo1 at 13,000Kms and to Oklahoma at 10,700Kms or so. East coast US openings are from Fiji darkness around 0630-0750Z ZL Wellington is 2600Kms away and should be ok - I dont know if Bob and all in ZL are still picking up Dcf39 but its all but dissapeared overnight here in Oklahoma now. Looking forward to seeing some US, ZL and possibly UA signals! Cheers Laurence Kl1X/5 > _________________________________________________________________ Watch LIVE baseball games on your computer with MLB.TV, included with MSN Premium! http://join.msn.com/?page=features/mlb&pgmarket=en-us/go/onm00200439ave/direct/01/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 41879 invoked from network); 13 May 2004 21:32:29 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 13 May 2004 21:32:29 -0000 Received: (qmail 68942 invoked from network); 13 May 2004 21:32:28 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 13 May 2004 21:32:26 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BONoY-000Hi7-Q3 for dave@picks.force9.co.uk; Thu, 13 May 2004 21:32:26 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BONnw-0005Jj-AC for rs_out_1@blacksheep.org; Thu, 13 May 2004 22:31:48 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BONnv-0005Ja-Mb for rsgb_lf_group@blacksheep.org; Thu, 13 May 2004 22:31:47 +0100 Received: from ms.genesis-technology.com ([63.171.43.8]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOUMJ-0007US-Rb for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 05:31:43 +0100 X-Fake-Domain: we0h Received: from we0h (rev-65.165.20.192.genesiswireless.us [65.165.20.192]) by ms.genesis-technology.com (8.12.9/8.12.9) with SMTP id i4DLVLnw013413; Thu, 13 May 2004 16:31:21 -0500 From: "WE0H" To: rsgb_lf_group@blacksheep.org Cc: "Post LWCA Reflector" Date: Thu, 13 May 2004 16:37:44 -0500 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook IMO, Build 9.0.6604 (9.0.2911.0) X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 In-Reply-To: <40A3E2BE.1010806@usa.net> Importance: Normal X-Scanned-By: MIMEDefang 2.36 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: G0MRF website??? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Can anyone tell me the address to David's website? The old address doesn't work anymore. Mike WE0H WD2XGI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 62218 invoked from network); 14 May 2004 11:02:40 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 14 May 2004 11:02:40 -0000 Received: (qmail 86737 invoked from network); 14 May 2004 11:02:40 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 14 May 2004 11:02:39 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BOaSc-000MF2-Qg for dave@picks.force9.co.uk; Fri, 14 May 2004 11:02:38 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOaRS-0006hT-9u for rs_out_1@blacksheep.org; Fri, 14 May 2004 12:01:26 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOaRR-0006hK-Jm for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 12:01:25 +0100 Received: from imo-m14.mx.aol.com ([64.12.138.204]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOgzp-0000A7-HS for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 19:01:21 +0100 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m14.mx.aol.com (mail_out_v37_r1.3.) id l.27.580515a9 (4568) for ; Fri, 14 May 2004 07:01:14 -0400 (EDT) From: G0MRF@aol.com Message-ID: <27.580515a9.2dd600fa@aol.com> Date: Fri, 14 May 2004 07:01:14 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 X-Spam-Score: 1.8 (+) X-Spam-Report: autolearn=no,DATE_IN_PAST_06_12=0.599,HTML_20_30=0.474,HTML_MESSAGE=0.001,HTML_TAG_BALANCE_HTML=0.411,NO_REAL_NAME=0.285 Subject: Re: LF: G0MRF website??? Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.2 required=5.0 tests=HTML_20_30,HTML_MESSAGE, HTML_TAG_BALANCE_HTML,NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 5/13/04 10:32:46 PM GMT Daylight Time, we0h@genesiswireless.us writes:


Can anyone tell me the address to David's website? The old address doesn't
work anymore.

Mike
WE0H
WD2XGI








Sorry.

Wanado has taken over my old ISP freeserve and they 'wiped' my account while I was away at 3B9C.

I'm talking to them and also trying to find something more reliable like g0mrf.com or org etc.

If you need something in particular let me know.

73

David  G0MRF From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 53503 invoked from network); 14 May 2004 14:04:00 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 14 May 2004 14:04:00 -0000 Received: (qmail 34406 invoked from network); 14 May 2004 14:04:00 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 14 May 2004 14:03:58 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BOdI6-0008eZ-HG for dave@picks.force9.co.uk; Fri, 14 May 2004 15:03:58 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOdHQ-0002QU-Bi for rs_out_1@blacksheep.org; Fri, 14 May 2004 15:03:16 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOdHP-0002QL-Ks for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 15:03:15 +0100 Received: from [193.82.116.18] (helo=public.thorcom.com) by relay.salmark.net with esmtp (Exim 4.24) id 1BOjpy-0000PL-Lr for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 22:03:22 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by public.thorcom.com with esmtp (Exim 4.12) id 1BOccr-0007cJ-00 for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 14:21:21 +0100 X-Fake-Domain: altair Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1BOcYM-0000I0-00 for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 14:16:42 +0100 X-No-DNS-For: 147.197.164.230 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1BOcYL-0006R9-00 for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 14:16:41 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Fri, 14 May 2004 14:16:36 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-UH-MailScanner: No Virus detected X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, X-SA-Exim-Rcpt-To: rsgb_lf_group@blacksheep.org Subject: LF: RE: VDC source with microvolt resolution Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 >Good. You analysis shows that what remains as a concern is only the >noise. Anybody knows of >an op-amp (readily available) better than the OP27, as far as noise is >concerned ? TNX. >73 Alberto I2PHD Dear Alberto, LF Group, I think Johan's "PWM-ed PWM" is a better idea, since you should be more or less guaranteed a monotonic Vout vs. input code transfer function for the DAC. I don't think op-amp noise in the filter will be a major problem - the noise voltage is proportional to sqrt(bandwidth), and the bandwidth is only a small fraction of a Hz. The high resistor values needed for the filter and their associated thermal noise mean that an op-amp with a low input noise voltage is pointless (1Meg has about 130nV/rootHz)- it is more important to minimize the input current noise, ie. use a FET input device. The active filter op-amp driving the EFC will have wide-band noise in its output, but most of this could be filtered out with a simple RC section (say 1kohm/100uF) between the op-amp and the EFC pin. In some work on an electrometer circuit I did some years back, I found the newer types of CMOS op-amp, like the LMC660/LMC662 were cheap and good in this sort of application. Usually, the noise and drift of the op-amp was less significant than thermal effects, leakage, vibration, cross-talk from the other parts of the circuit and all sorts of peculiar effects that plague DC circuits at the uV level. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 97972 invoked from network); 14 May 2004 14:33:05 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 14 May 2004 14:33:05 -0000 Received: (qmail 38665 invoked from network); 14 May 2004 14:33:04 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 14 May 2004 14:33:03 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOdkF-0009pE-Nn for dave@picks.force9.co.uk; Fri, 14 May 2004 14:33:03 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOdjs-0002pQ-AN for rs_out_1@blacksheep.org; Fri, 14 May 2004 15:32:40 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOdjr-0002pH-TI for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 15:32:39 +0100 Received: from mailout04.sul.t-online.com ([194.25.134.18]) by relay.salmark.net with esmtp (Exim 4.24) id 1BOkIR-0000TH-1T for rsgb_lf_group@blacksheep.org; Fri, 14 May 2004 22:32:47 +0100 X-Fake-Domain: fwd00.aul.t-online.de Received: from fwd00.aul.t-online.de by mailout04.sul.t-online.com with smtp id 1BOd8X-00018Z-00; Fri, 14 May 2004 15:54:05 +0200 X-Fake-Domain: hw1 Received: from hw1 (SUCr1eZprewhigf-4rM0fgmZ2YYbTcqUhQs0PCTclDxRYQZEMaRGU3@[217.225.99.51]) by fwd00.sul.t-online.com with esmtp id 1BOd8I-2BeKpc0; Fri, 14 May 2004 15:53:50 +0200 Date: Fri, 14 May 2004 15:53:47 +0200 From: Hartmut Wolff X-Suspect-Bulk-Mailer: The Bat! X-Mailer: The Bat! (v1.62i) Personal X-Priority: 3 (Normal) Message-ID: <10210552774.20040514155347@t-online.de> To: "rsgb_lf_group@blacksheep.org" MIME-Version: 1.0 X-Seen: false X-ID: SUCr1eZprewhigf-4rM0fgmZ2YYbTcqUhQs0PCTclDxRYQZEMaRGU3 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no,TO_ADDRESS_EQ_REAL=0.011 Subject: LF: 137,77 last night Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=TO_ADDRESS_EQ_REAL autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 3 signals captured last night: 137776 G3NYK visible 2120z-0500z best around 2200z "O" copied 137777 VO1NA "O" copy of QRSS30 0000z-0130z some deep fadings on the segments started at 0200z and 0300z. some partial copies of the 5WPM signal 0045z-0100z 137777,4 WD2XES some traces around 0130z and 0300z VO1NA, Joe's 5WPM signal is on the QRSS30 screen up to 2,5 Hz broad, so other weak stations in that range were covered by the signal. 73 Hartmut Wolff mailto:wolff.h@t-online.de Locator:JO52HO From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 59760 invoked from network); 15 May 2004 07:57:34 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 15 May 2004 07:57:34 -0000 Received: (qmail 15055 invoked from network); 15 May 2004 07:57:34 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 15 May 2004 07:57:33 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BOu33-0003nR-4m for dave@picks.force9.co.uk; Sat, 15 May 2004 07:57:33 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BOu24-0000iu-4D for rs_out_1@blacksheep.org; Sat, 15 May 2004 08:56:32 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BOu23-0000il-Mw for rsgb_lf_group@blacksheep.org; Sat, 15 May 2004 08:56:31 +0100 Received: from kaliber.flexi-surf.co.uk ([62.41.128.11]) by relay.salmark.net with esmtp (Exim 4.24) id 1BP0ac-0002AY-Gf for rsgb_lf_group@blacksheep.org; Sat, 15 May 2004 15:56:38 +0100 X-Fake-Domain: y6m8a2 Received: from y6m8a2 (host81-7-58-211.surfport24.v21.co.uk [81.7.58.211]) by kaliber.flexi-surf.co.uk (8.10.2/8.10.2) with SMTP id i4F7uKs17920 for ; Sat, 15 May 2004 08:56:21 +0100 X-Bad-Message-ID: no DNS (y6m8a2) Message-ID: <001d01c43a52$cc84c8c0$d33a0751@y6m8a2> From: "Frederick John Armstrong" To: "lf group" Date: Sat, 15 May 2004 09:01:13 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 X-Spam-Score: 0.9 (/) X-Spam-Report: autolearn=no,HTML_30_40=0.809,HTML_MESSAGE=0.001,RCVD_IN_SORBS=0.1 Subject: LF: de G3JRL Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hello all. I have repaired the 136 kHz transmitter and now QRV again. Will be sendind CQs in the hope that someone will be out there. Replies and reports would be appreciated.  For the moment my transmissions will be at random times so taking pot luck hi.
 
73 from John, G3JRL..
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 49122 invoked from network); 15 May 2004 16:47:30 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 15 May 2004 16:47:30 -0000 Received: (qmail 2344 invoked from network); 15 May 2004 16:47:30 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 15 May 2004 16:47:29 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BP2Jt-0000UN-3t for dave@picks.force9.co.uk; Sat, 15 May 2004 16:47:29 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BP2J5-0004b4-80 for rs_out_1@blacksheep.org; Sat, 15 May 2004 17:46:39 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BP2J4-0004av-Gg for rsgb_lf_group@blacksheep.org; Sat, 15 May 2004 17:46:38 +0100 Received: from mailout05.sul.t-online.com ([194.25.134.82]) by relay.salmark.net with esmtp (Exim 4.24) id 1BP8rd-0002jr-Cc for rsgb_lf_group@blacksheep.org; Sun, 16 May 2004 00:46:45 +0100 X-Fake-Domain: fwd04.aul.t-online.de Received: from fwd04.aul.t-online.de by mailout05.sul.t-online.com with smtp id 1BP2J0-0003d7-02; Sat, 15 May 2004 18:46:34 +0200 X-Fake-Domain: (r3GjsmZSZeo907NSYmGTdIfO1sh8IEq9jxDonPBe4-uq-Bjkxjhr4w@[62.224.53.119]) Received: from (r3GjsmZSZeo907NSYmGTdIfO1sh8IEq9jxDonPBe4-uq-Bjkxjhr4w@[62.224.53.119]) by fwd04.sul.t-online.com with smtp id 1BP2Im-0lvSUa0; Sat, 15 May 2004 18:46:20 +0200 From: jannsen <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: <10210552774.20040514155347@t-online.de> X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Date: Sat, 15 May 2004 18:46:20 +0200 Message-ID: <1BP2Im-0lvSUa0@fwd04.sul.t-online.com> X-Seen: false X-ID: r3GjsmZSZeo907NSYmGTdIfO1sh8IEq9jxDonPBe4-uq-Bjkxjhr4w X-Spam-Score: 2.4 (++) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,FROM_STARTS_WITH_NUMS=1.574 Subject: LF: vo1na last night Content-Type: multipart/mixed; boundary="------------050803080000060203010005" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FROM_ENDS_IN_NUMS, FROM_STARTS_WITH_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 This is a multi-part message in MIME format. --------------050803080000060203010005 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit see attachment pse. 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wQ3MSpPFHKoZHCuoYblYMp57hgCD2IBqagAooooAKKKKACiiigAooooAKKKKACiiigAooooA KKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACiiigAooooAKKKKACii igAooooA/9k= --------------050803080000060203010005-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 2378 invoked from network); 15 May 2004 16:51:15 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 15 May 2004 16:51:15 -0000 Received: (qmail 66196 invoked from network); 15 May 2004 16:51:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 15 May 2004 16:51:14 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BP2NV-000Gsz-S1 for dave@picks.force9.co.uk; Sat, 15 May 2004 16:51:14 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BP2NI-0004in-Ob for rs_out_1@blacksheep.org; Sat, 15 May 2004 17:51:00 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BP2NI-0004ie-26 for rsgb_lf_group@blacksheep.org; Sat, 15 May 2004 17:51:00 +0100 Received: from cmsrelay03.mx.net ([165.212.11.112]) by relay.salmark.net with smtp (Exim 4.24) id 1BP8vq-0002kD-Br for rsgb_lf_group@blacksheep.org; Sun, 16 May 2004 00:51:06 +0100 Received: from cmsapps01.cms.usa.net (165.212.11.136) by cmsoutbound.mx.net with SMTP; 15 May 2004 16:50:44 -0000 Received: from usa.net [151.41.154.107] by cmsapps01.cms.usa.net (ASMTP/dibene@usa.net) via mtad (C8.MAIN.3.13N) with ESMTP id 860ieoqYp0050M36; Sat, 15 May 2004 16:50:41 GMT X-USANET-Auth: 151.41.154.107 AUTH dibene@usa.net usa.net Message-ID: <40A64A60.9030308@usa.net> Date: Sat, 15 May 2004 18:50:40 +0200 From: Alberto di Bene User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: In-Reply-To: X-Spam-Score: 2.8 (++) X-Spam-Report: autolearn=no,FAKE_HELO_USA_NET=2.8 Subject: LF: RE: VDC source with microvolt resolution Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.8 required=5.0 tests=FAKE_HELO_USA_NET autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dear Jim, thanks for your further considerations. I will have a look at those opamps. And yes, working at the uV level is a bit of challenge. I wonder if reducing the Hz/V sensitivity of the EFC with a passive attenuator could be a good strategy... after all, I don't need an adjustment range of plus/minus 8 Hz. A tenth of this should be enough... 73 Alberto I2PHD ---------------------------------- James Moritz wrote: >Dear Alberto, LF Group, > >I think Johan's "PWM-ed PWM" is a better idea, since you should be more or >less guaranteed a monotonic Vout vs. input code transfer function for the >DAC. > >I don't think op-amp noise in the filter will be a major problem - the noise >voltage is proportional to sqrt(bandwidth), and the bandwidth is only a >small fraction of a Hz. The high resistor values needed for the filter and >their associated thermal noise mean that an op-amp with a low input noise >voltage is pointless (1Meg has about 130nV/rootHz)- it is more important to >minimize the input current noise, ie. use a FET input device. The active >filter op-amp driving the EFC will have wide-band noise in its output, but >most of this could be filtered out with a simple RC section (say >1kohm/100uF) between the op-amp and the EFC pin. > >In some work on an electrometer circuit I did some years back, I found the >newer types of CMOS op-amp, like the LMC660/LMC662 were cheap and good in >this sort of application. Usually, the noise and drift of the op-amp was >less significant than thermal effects, leakage, vibration, cross-talk from >the other parts of the circuit and all sorts of peculiar effects that plague >DC circuits at the uV level. > >Cheers, Jim Moritz >73 de M0BMU > > > >. > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 5047 invoked from network); 17 May 2004 19:27:42 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 17 May 2004 19:27:42 -0000 Received: (qmail 44219 invoked from network); 17 May 2004 19:27:42 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 17 May 2004 19:27:38 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BPnly-000B1Y-5n for dave@picks.force9.co.uk; Mon, 17 May 2004 19:27:38 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BPnkG-00035W-AT for rs_out_1@blacksheep.org; Mon, 17 May 2004 20:25:52 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BPnkF-00035N-9R for rsgb_lf_group@blacksheep.org; Mon, 17 May 2004 20:25:51 +0100 Received: from mta204-rme.xtra.co.nz ([210.86.15.147]) by relay.salmark.net with esmtp (Exim 4.24) id 1BPuIl-0007yV-TP for rsgb_lf_group@blacksheep.org; Tue, 18 May 2004 03:25:56 +0100 Received: from web3-rme.xtra.co.nz ([210.86.15.141]) by mta204-rme.xtra.co.nz with ESMTP id <20040517192533.OPEZ21783.mta204-rme.xtra.co.nz@web3-rme.xtra.co.nz> for ; Tue, 18 May 2004 07:25:33 +1200 X-Fake-Domain: mcalevey Received: from mcalevey ([210.55.81.79]) by web3-rme.xtra.co.nz with SMTP id <20040517192533.LGER3371.web3-rme.xtra.co.nz@mcalevey> for ; Tue, 18 May 2004 07:25:33 +1200 X-Bad-Message-ID: no DNS (mcalevey) Message-ID: <000201c43c44$b206f6a0$4f5137d2@mcalevey> From: "McAlevey" To: rsgb_lf_group@blacksheep.org References: Date: Tue, 18 May 2004 07:24:41 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: DCF39 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Laurence >I dont know if Bob and all in ZL are still picking up Dcf39 but its all but >dissapeared overnight here in Oklahoma now. DCF39 is still very strong here and audible over our sunrise. Mike ZL4OL From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 37922 invoked from network); 17 May 2004 20:10:29 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 17 May 2004 20:10:29 -0000 Received: (qmail 41924 invoked from network); 17 May 2004 20:10:28 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 17 May 2004 20:10:22 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BPoRK-0009vw-3F for dave@picks.force9.co.uk; Mon, 17 May 2004 20:10:22 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BPoQm-0003s9-Dp for rs_out_1@blacksheep.org; Mon, 17 May 2004 21:09:48 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BPoQl-0003s0-9o for rsgb_lf_group@blacksheep.org; Mon, 17 May 2004 21:09:47 +0100 Received: from bay12-f86.bay12.hotmail.com ([64.4.35.86] helo=hotmail.com) by relay.salmark.net with esmtp (Exim 4.24) id 1BPuzH-0008Aa-Bs for rsgb_lf_group@blacksheep.org; Tue, 18 May 2004 04:09:51 +0100 Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Mon, 17 May 2004 13:09:35 -0700 Received: from 12.31.208.217 by by12fd.bay12.hotmail.msn.com with HTTP; Mon, 17 May 2004 20:09:34 GMT X-Originating-IP: [12.31.208.217] X-Originating-Email: [hellozerohellozero@hotmail.com] X-Sender: hellozerohellozero@hotmail.com From: "Laurence KL1X" To: rsgb_lf_group@blacksheep.org Cc: Alan.Melia@btinternet.com Date: Mon, 17 May 2004 12:09:34 -0800 Mime-Version: 1.0 Message-ID: X-OriginalArrivalTime: 17 May 2004 20:09:35.0039 (UTC) FILETIME=[DFA1DCF0:01C43C4A] X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=no,SUBJ_ALL_CAPS=0.567 Subject: RE: LF: DCF39 Content-Type: text/plain; charset=windows-1252; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.6 required=5.0 tests=SUBJ_ALL_CAPS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Thanks Mike - Our QRN levels in Oklahoma are high but the residual absorbtion overnight is now strong. Ive not seem DCF39 since March. Im still working on the equipment for Fiji in Late June but all is looking well for a reasonable receiving system. Id better check the quartz hill site to see when the next lf tests are. Laurence Kl1X >From: "McAlevey" >Reply-To: rsgb_lf_group@blacksheep.org >To: >Subject: LF: DCF39 >Date: Tue, 18 May 2004 07:24:41 +1200 > >Laurence > > >I dont know if Bob and all in ZL are still picking up Dcf39 but its all >but > >dissapeared overnight here in Oklahoma now. > >DCF39 is still very strong here and audible over our sunrise. > >Mike ZL4OL > > _________________________________________________________________ Express yourself with the new version of MSN Messenger! Download today - it's FREE! http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/ From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 54352 invoked from network); 18 May 2004 16:32:51 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 18 May 2004 16:32:51 -0000 Received: (qmail 35363 invoked from network); 18 May 2004 16:32:51 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 18 May 2004 16:32:49 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BQ7WL-00093a-HD for dave@picks.force9.co.uk; Tue, 18 May 2004 16:32:49 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQ7Va-0005YI-Si for rs_out_1@blacksheep.org; Tue, 18 May 2004 17:32:02 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQ7Va-0005Y9-9Y for rsgb_lf_group@blacksheep.org; Tue, 18 May 2004 17:32:02 +0100 Received: from mailout09.sul.t-online.com ([194.25.134.84]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQE41-0001O4-0q for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 00:32:01 +0100 X-Fake-Domain: fwd09.aul.t-online.de Received: from fwd09.aul.t-online.de by mailout09.sul.t-online.com with smtp id 1BQ7VO-0007Fg-04; Tue, 18 May 2004 18:31:50 +0200 X-Fake-Domain: hw1 Received: from hw1 (rAU-okZZ8eKYReGzd-B9JntHuNR2V8ctzzSDlWBaIYNrZjclZ5GdYf@[217.83.128.98]) by fwd09.sul.t-online.com with esmtp id 1BQ7V9-1Hs9lw0; Tue, 18 May 2004 18:31:35 +0200 Date: Tue, 18 May 2004 18:31:26 +0200 From: Hartmut Wolff X-Suspect-Bulk-Mailer: The Bat! X-Mailer: The Bat! (v1.62i) Personal X-Priority: 3 (Normal) Message-ID: <1439197705.20040518183126@t-online.de> To: "rsgb_lf_group@blacksheep.org" MIME-Version: 1.0 X-Seen: false X-ID: rAU-okZZ8eKYReGzd-B9JntHuNR2V8ctzzSDlWBaIYNrZjclZ5GdYf X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,RCVD_IN_NJABL=0.1,RCVD_IN_SORBS=0.1,TO_ADDRESS_EQ_REAL=0.011 Subject: LF: VO1NA in 5WPM Content-Type: multipart/mixed; boundary="------------090403070009000003000309" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=TO_ADDRESS_EQ_REAL autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 This is a multi-part message in MIME format. --------------090403070009000003000309 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit Last night I had some partial copies of Joe's 5WPM signal 0140-0200. The picture shows a callsign segment with QRM from the modulation of DCF39 during the "V" and the "N". The signal could be detected by ears. 73 Hartmut mailto:wolff.h@t-online.de Locator JO52HO --------------090403070009000003000309 Content-Type: image/jpeg; name="040518-0158.jpg" Content-Transfer-Encoding: base64 Content-Disposition: inline; filename="040518-0158.jpg" /9j/4AAQSkZJRgABAQEBLAEsAAD/2wBDAAMCAgMCAgMDAwMEAwMEBQgFBQQEBQoHBwYIDAoM DAsKCwsNDhIQDQ4RDgsLEBYQERMUFRUVDA8XGBYUGBIUFRT/2wBDAQMEBAUEBQkFBQkUDQsN FBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBQUFBT/wAAR CAAeAVsDASIAAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAA AgEDAwIEAwUFBAQAAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkK FhcYGRolJicoKSo0NTY3ODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWG h4iJipKTlJWWl5iZmqKjpKWmp6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl 5ufo6erx8vP09fb3+Pn6/8QAHwEAAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREA AgECBAQDBAcFBAQAAQJ3AAECAxEEBSExBhJBUQdhcRMiMoEIFEKRobHBCSMzUvAVYnLRChYk NOEl8RcYGRomJygpKjU2Nzg5OkNERUZHSElKU1RVVldYWVpjZGVmZ2hpanN0dXZ3eHl6goOE 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/wCQvcf9dP8ACv2qtWk8xqrtTufP060sJkcK0N1Z6+p9e/BH9oLwBo2nQJea/wCSyqMj7HcN 39ozX0TZ/GTwfrWkG8stY8622lt/2aZeOOxQGvyq8E/8eq/T+tfXXw2/5J4P+uLf0r+eOO/D nKqEo4+NSfPUkr6q2vbQ+myrHVMXhY1ppXfYk+MnxM8N/FX7XoHhbUv7U1aPIa38iSHB/wB6 RVX9a5jw58H/ABfZaLawzaRskUHK/aYTjLE9n968v+Df/JbdY/3z/I19zxf6pPoK5s8xc+DM PRynALmpv3ry1d9V0srfI1wVV4uDqz3Ta+52/Q//2Q== --------------090403070009000003000309-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 56136 invoked from network); 18 May 2004 19:21:24 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 18 May 2004 19:21:24 -0000 Received: (qmail 74565 invoked from network); 18 May 2004 19:21:23 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 18 May 2004 19:21:18 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BQA9O-000IxQ-M3 for dave@picks.force9.co.uk; Tue, 18 May 2004 19:21:18 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQA8e-0000yZ-6z for rs_out_1@blacksheep.org; Tue, 18 May 2004 20:20:32 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQA8d-0000yQ-KJ for rsgb_lf_group@blacksheep.org; Tue, 18 May 2004 20:20:31 +0100 Received: from smtp801.mail.ukl.yahoo.com ([217.12.12.138]) by relay.salmark.net with smtp (Exim 4.24) id 1BQGhA-0001f9-V5 for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 03:20:36 +0100 X-Fake-Domain: unknown Received: from unknown (HELO rogersservices) (james.moritz@213.122.130.53 with login) by smtp801.mail.ukl.yahoo.com with SMTP; 18 May 2004 18:50:01 -0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <001101c43d08$3fbb78e0$35827ad5@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: <1439197705.20040518183126@t-online.de> Date: Tue, 18 May 2004 19:44:26 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: VO1NA in 5WPM Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 ----- Original Message ----- From: Hartmut Wolff To: Sent: Tuesday, May 18, 2004 5:31 PM Subject: LF: VO1NA in 5WPM > Last night I had some partial copies of Joe's 5WPM signal 0140-0200. ... Dear Hartmut, LF group, Reception of VO1NA here has not been particularly good over the last few nights - although there were periods of good copy of the QRSS30 signal most nights between about 0100 and 0330z, the noise levels have been higher, and the signal levels lower, than they were during the spring. Last night, best reception was at about 0300, with the 5wpm signal visible as a blur on the screen, but about 15 - 20dB below an audible level, I estimate. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 22057 invoked from network); 18 May 2004 20:19:09 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore01.plus.net with SMTP; 18 May 2004 20:19:09 -0000 Received: (qmail 10476 invoked from network); 18 May 2004 20:19:09 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 18 May 2004 20:19:07 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BQB3L-0002aR-R0 for dave@picks.force9.co.uk; Tue, 18 May 2004 21:19:07 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQB2O-0002Kq-2k for rs_out_1@blacksheep.org; Tue, 18 May 2004 21:18:08 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQB2N-0002KC-G6 for rsgb_lf_group@blacksheep.org; Tue, 18 May 2004 21:18:07 +0100 Received: from postbode01.zonnet.nl ([62.58.50.88]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQHav-0001qd-Dq for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 04:18:13 +0100 Received: (qmail 17122 invoked by uid 10); 18 May 2004 20:17:38 -0000 Received: (vexira-qq 17069-3924F063 invoked from network) 18 May 2004 22:17:37 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.104]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 18 May 2004 20:17:37 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <003201c43d13$c22fc500$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Tue, 18 May 2004 22:06:21 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MIMEOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.3; VDF: 6.25.0.69; host: postbode01.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: output transformer problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello all, due to circumstances I'll have less time to work on the transmitter. Meanwhile I tried several other transformers, as well as some other things, like disconnecting the Scottky diodes and the 470nF C's . Now I have 6R8 from the TC4426 direct to the gates, which are grounded with 47k resistor. I tried all kind of things around the FET's with other C's to ground or with C-R to ground etc. Some progress has been made, but still difficult. The ouput filter seems to have a quite large influence on the over all drain current. Also the value of the capacitor that grounds the centre tap is important. In my case I found better results at 330nF. Several available cores tested, like 3C11 (white) and 3E1 (green) both 36mm. Also tried an T106-26 from an old computer SMPS. Wonder what current I should have when applying lower supply voltages to the FET's. For example. what currents to others have at 15V or 20V or so. 73, Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 96270 invoked from network); 18 May 2004 20:40:53 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 18 May 2004 20:40:53 -0000 Received: (qmail 43836 invoked from network); 18 May 2004 20:40:53 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 18 May 2004 20:40:51 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BQBON-000BHL-L5 for dave@picks.force9.co.uk; Tue, 18 May 2004 21:40:51 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQBNZ-0002eK-Pb for rs_out_1@blacksheep.org; Tue, 18 May 2004 21:40:01 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQBNZ-0002eB-AA for rsgb_lf_group@blacksheep.org; Tue, 18 May 2004 21:40:01 +0100 Received: from thumbler.kulnet.kuleuven.ac.be ([134.58.240.45]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQHw7-0001sQ-9Q for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 04:40:07 +0100 Received: from localhost (localhost [127.0.0.1]) by thumbler.kulnet.kuleuven.ac.be (Postfix) with ESMTP id 461011377DC for ; Tue, 18 May 2004 22:39:52 +0200 (CEST) Received: from octavianus.kulnet.kuleuven.ac.be (octavianus.kulnet.kuleuven.ac.be [134.58.240.71]) by thumbler.kulnet.kuleuven.ac.be (Postfix) with ESMTP id B895E13778D for ; Tue, 18 May 2004 22:39:49 +0200 (CEST) Received: from localhost (webmail2.cc.kuleuven.ac.be [134.58.242.4]) by octavianus.kulnet.kuleuven.ac.be (Postfix) with ESMTP id A8E3DAEE0C for ; Tue, 18 May 2004 22:39:49 +0200 (CEST) Received: from 220.34-201-80.adsl.skynet.be (220.34-201-80.adsl.skynet.be [80.201.34.220]) by webmail2.kuleuven.be (IMP) with HTTP for ; Tue, 18 May 2004 22:39:49 +0200 Message-ID: <1084912789.40aa7495a09a0@webmail2.kuleuven.be> Date: Tue, 18 May 2004 22:39:49 +0200 From: Rik Strobbe To: rsgb_lf_group@blacksheep.org References: <003201c43d13$c22fc500$2102000a@ibm> In-Reply-To: <003201c43d13$c22fc500$2102000a@ibm> MIME-Version: 1.0 User-Agent: Internet Messaging Program (IMP) 3.2-cvs X-Originating-IP: 80.201.34.220 X-Virus-Scanned: by KULeuven Antivirus Cluster X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,RCVD_IN_SORBS=0.1 Subject: Re: LF: output transformer problems Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Hi Dick, I forgot what design you are using, but I'm a bit surprised of all the trouble you got with the output transformer and LPF. I have built several variations on the G3YXM design (http://www.wireless.org.uk/136rig.htm) and it all worked without problems. Output transformers were on double-U core salvaged from old TV sets and the LPF has "air coils" (would on plastic "plumber tubes"). Only critical thing is the ratio of the output transformer, as the LPF is 50 Ohm in/out the transformer has to convert the low impedance at the drains to 50 Ohm. If the ratio is too low the FET's draw a lot of current and you get little output. If you are not sure what the ratio should be it is better to start with a far too high ratio (then you will have little output power but also little drain current) and gradually decrease the ratio (remove windings from the "antenna-side" of the transformer). 73, Rik ON7YD Citeren Dick : > Hello all, > > due to circumstances I'll have less time to work on the transmitter. > > Meanwhile I tried several other transformers, as well as some > other things, like disconnecting the Scottky diodes and the 470nF > C's . > Now I have 6R8 from the TC4426 direct to the gates, which > are grounded with 47k resistor. > I tried all kind of things around the FET's with other C's to ground > or > with C-R to ground etc. > Some progress has been made, but still difficult. > > The ouput filter seems to have a quite large influence on the over > all > drain current. > Also the value of the capacitor that grounds the centre tap is > important. > In my case I found better results at 330nF. > > Several available cores tested, like 3C11 (white) and 3E1 (green) > both 36mm. > Also tried an T106-26 from an old computer SMPS. > > Wonder what current I should have when applying lower supply > voltages > to the FET's. > For example. what currents to others have at 15V or 20V or so. > > 73, Dick, pa4vhf > > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 80101 invoked from network); 18 May 2004 23:35:30 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore04.plus.net with SMTP; 18 May 2004 23:35:30 -0000 Received: (qmail 65528 invoked from network); 18 May 2004 23:35:30 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 18 May 2004 23:35:29 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BQE7M-000GoH-Qp for dave@picks.force9.co.uk; Wed, 19 May 2004 00:35:28 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQE6b-0006Yt-9L for rs_out_1@blacksheep.org; Wed, 19 May 2004 00:34:41 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQE6a-0006Yk-Mx for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 00:34:40 +0100 Received: from imo-m26.mx.aol.com ([64.12.137.7]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQKf8-00029p-Mu for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 07:34:46 +0100 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m26.mx.aol.com (mail_out_v37_r1.3.) id l.cf.cfcb472 (3940) for ; Tue, 18 May 2004 19:34:25 -0400 (EDT) From: G0MRF@aol.com Message-ID: Date: Tue, 18 May 2004 19:34:25 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 8.0 for Windows sub 670 X-Spam-Score: 2.3 (++) X-Spam-Report: autolearn=no,DATE_IN_PAST_06_12=0.599,HTML_MESSAGE=0.001,HTML_TAG_BALANCE_HTML=0.411,MAILTO_TO_SPAM_ADDR=1.052,NO_REAL_NAME=0.285 Subject: Re: LF: output transformer problems Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.7 required=5.0 tests=HTML_MESSAGE, HTML_TAG_BALANCE_HTML,MAILTO_TO_SPAM_ADDR,NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit In a message dated 5/18/04 9:19:13 PM GMT Daylight Time, knaap159@zonnet.nl writes:

Wonder what current I should have when applying lower supply voltages
to the FET's.
For example. what currents to others have at 15V or 20V or so.

73, Dick, pa4vhf




The amplifier follows the standard relationship of output power to supply voltage.
i.e.  Twice the voltage will give four times the output power.

If you are using voltages much lower than 28V then you can increase the secondary turns or decrease the primary winding to compensate.

Removing the diodes will cause a negative voltage pulse on the FET gates as they has now lost their low impedance reference to ground. This may or may not be a problem.

Good luck

David From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 48674 invoked from network); 19 May 2004 07:50:45 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore02.plus.net with SMTP; 19 May 2004 07:50:45 -0000 Received: (qmail 77382 invoked from network); 19 May 2004 07:50:45 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 19 May 2004 07:50:43 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BQLqd-000Jtj-Bu for dave@picks.force9.co.uk; Wed, 19 May 2004 07:50:43 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQLpx-0000f2-T4 for rs_out_1@blacksheep.org; Wed, 19 May 2004 08:50:01 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQLpx-0000et-B8 for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 08:50:01 +0100 Received: from magneto.esoterica.pt ([195.22.0.25]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQSOV-0002rI-8t for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 15:50:07 +0100 X-Fake-Domain: Slave_13.esoterica.pt Received: from Slave_13.esoterica.pt (adsl-norte02-1-247.vianw.pt [80.172.144.247]) by magneto.esoterica.pt (8.12.11/8.12.11) with ESMTP id i4J7ns1x027895 for ; Wed, 19 May 2004 08:49:55 +0100 Message-Id: <5.2.0.9.2.20040519074411.01fa5ab8@pop.vianw.pt> X-Sender: nx4ywv@pop.vianw.pt X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 Date: Wed, 19 May 2004 07:49:42 +0000 To: rsgb_lf_group@blacksheep.org From: Brian Rogerson Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Off Topic---Decca Navigator Info? Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Would be most grateful if anyone could give me any information on the active aerial for a Decca Yacht Navigator IV (badged Racal but displaying Philips when switched on). Brian CT1DRP From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 7673 invoked from network); 19 May 2004 10:33:11 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 19 May 2004 10:33:11 -0000 Received: (qmail 9243 invoked from network); 19 May 2004 10:33:11 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 19 May 2004 10:33:08 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BQONo-0001p2-Jw for dave@picks.force9.co.uk; Wed, 19 May 2004 10:33:08 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQON7-0004GI-4j for rs_out_1@blacksheep.org; Wed, 19 May 2004 11:32:25 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQON2-0004G9-0m for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 11:32:20 +0100 Received: from mta208-rme.xtra.co.nz ([210.86.15.119]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQUvZ-00038v-DR for rsgb_lf_group@blacksheep.org; Wed, 19 May 2004 18:32:25 +0100 Received: from mta3-rme.xtra.co.nz ([210.86.15.157]) by mta208-rme.xtra.co.nz with ESMTP id <20040519103154.KGEM29334.mta208-rme.xtra.co.nz@mta3-rme.xtra.co.nz> for ; Wed, 19 May 2004 22:31:54 +1200 X-Fake-Domain: mcalevey Received: from mcalevey ([210.54.65.62]) by mta3-rme.xtra.co.nz with SMTP id <20040519103153.DFJI11405.mta3-rme.xtra.co.nz@mcalevey> for ; Wed, 19 May 2004 22:31:53 +1200 X-Bad-Message-ID: no DNS (mcalevey) Message-ID: <003901c43d8c$78d29940$1a4036d2@mcalevey> From: "McAlevey" To: rsgb_lf_group@blacksheep.org References: <003201c43d13$c22fc500$2102000a@ibm> <1084912789.40aa7495a09a0@webmail2.kuleuven.be> Date: Wed, 19 May 2004 22:30:36 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: SXV Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Ed, my direct emails do not seem to be reaching you. I have done some listening (looking) for SXV in the last few days but nothing seen. DCF39 continues very strong. I assume SXV is active and their mark frequency is still 135.870? Mike ZL4OL From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 31527 invoked from network); 20 May 2004 18:26:48 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 20 May 2004 18:26:48 -0000 Received: (qmail 78354 invoked from network); 20 May 2004 18:26:47 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 20 May 2004 18:26:23 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BQsFL-000Id1-Ay for dave@picks.force9.co.uk; Thu, 20 May 2004 18:26:23 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQsDe-0003Uz-4r for rs_out_1@blacksheep.org; Thu, 20 May 2004 19:24:38 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQsDd-0003Uq-IQ for rsgb_lf_group@blacksheep.org; Thu, 20 May 2004 19:24:37 +0100 Received: from mta6-out.net.nltree.nl ([212.178.7.122]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQym4-0006Ca-Eq for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 02:24:36 +0100 Received: from amsat.org (wk66.32947.ip.nltree.nl [217.100.138.196]) by mta6-out.net.nltree.nl (Postfix) with ESMTP id 57B0C7B1D for ; Thu, 20 May 2004 19:53:50 +0200 (MEST) Message-ID: <40ACEF21.80408@amsat.org> Date: Thu, 20 May 2004 19:47:13 +0200 From: Christiaan Roselaar User-Agent: Mozilla/5.0 (Windows; U; Win98; en-US; rv:1.4) Gecko/20030624 Netscape/7.1 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: In-Reply-To: X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,TW_QR=0.077 Subject: LF: looking for first signals ... Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Hi All, Today I completed my loading coil. Can anyone help me reading my first signal on 136Khz please? I'm qrv most of the evening. 73's Chris PA3FUN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 96347 invoked from network); 20 May 2004 19:26:35 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 20 May 2004 19:26:35 -0000 Received: (qmail 94784 invoked from network); 20 May 2004 19:26:34 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 20 May 2004 19:26:33 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BQtBZ-000OWd-GO for dave@picks.force9.co.uk; Thu, 20 May 2004 19:26:33 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQtB0-0004iT-0i for rs_out_1@blacksheep.org; Thu, 20 May 2004 20:25:58 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQtAz-0004iK-Ip for rsgb_lf_group@blacksheep.org; Thu, 20 May 2004 20:25:57 +0100 Received: from olympus.pncl.co.uk ([195.224.180.233]) by relay.salmark.net with esmtp (Exim 4.24) id 1BQzjU-0006JD-BR for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 03:26:00 +0100 X-Fake-Domain: k7t Received: from k7t (host-212-158-223-252.bulldogdsl.com [212.158.223.252]) (authenticated bits=0) by olympus.pncl.co.uk (8.12.10/8.12.10) with ESMTP id i4KJRe5S018605 for ; Thu, 20 May 2004 20:27:41 +0100 X-Bad-Message-ID: no DNS (k7t) Message-ID: <000401c43ea0$a6d54260$2201a8c0@k7t> From: "Walter Blanchard" To: rsgb_lf_group@blacksheep.org References: <5.2.0.9.2.20040519074411.01fa5ab8@pop.vianw.pt> Date: Thu, 20 May 2004 20:28:32 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Pinnacle-MailScanner-Information: Please contact the ISP for more information X-Pinnacle-MailScanner: Found to be clean X-MailScanner-From: blanch@pncl.co.uk X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: Off Topic---Decca Navigator Info? Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Brian, Sorry, haven't got the cct for this one but they were all broad-band devices covering 70-127 kHz so should be OK for 136. Usually they needed 12v up the coax. Walter G3JKV. ----- Original Message ----- From: "Brian Rogerson" To: Sent: Wednesday, May 19, 2004 8:49 AM Subject: LF: Off Topic---Decca Navigator Info? > Would be most grateful if anyone could give me any information on > the active aerial for a Decca Yacht Navigator IV (badged Racal but > displaying Philips when switched on). Brian CT1DRP > > --- Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.676 / Virus Database: 438 - Release Date: 03/05/04 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 23149 invoked from network); 21 May 2004 00:27:47 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 21 May 2004 00:27:47 -0000 Received: (qmail 88858 invoked from network); 21 May 2004 00:27:47 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 21 May 2004 00:27:46 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BQxt4-000MmZ-Kj for dave@picks.force9.co.uk; Fri, 21 May 2004 00:27:46 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BQxsH-0002Ew-5g for rs_out_1@blacksheep.org; Fri, 21 May 2004 01:26:57 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BQxsG-0002Ek-BT for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 01:26:56 +0100 Received: from smtp800.mail.ukl.yahoo.com ([217.12.12.142]) by relay.salmark.net with smtp (Exim 4.24) id 1BR4Qo-0006sg-Ga for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 08:27:02 +0100 X-Fake-Domain: unknown Received: from unknown (HELO rogersservices) (james.moritz@81.135.134.46 with login) by smtp800.mail.ukl.yahoo.com with SMTP; 21 May 2004 00:26:43 -0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <000f01c43ec9$9c9251c0$2e868751@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: <003201c43d13$c22fc500$2102000a@ibm> Date: Fri, 21 May 2004 01:21:06 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-Spam-Score: 1.2 (+) X-Spam-Report: autolearn=no,MAILTO_TO_SPAM_ADDR=1.052,RCVD_IN_SORBS=0.1 Subject: LF: Re: output transformer problems Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Dear Dick, LF Group, I have been playing around with different output circuit arrangements for my G0MRF TX board - the simplest configuration which gives good results is like this:- -The 470nF capacitor C23 is eliminated completely. -Inductor L4 is increased in value to 56uH (25 turns of 1mm enamelled wire on T106-26 iron dust core) The value is not at all critical, provided it is more than about 20uH and can handle the DC current. High Q is not required. -Capacitors C22 and C24 are each replaced with a series combination of 4.7nF + 5ohms (2x 10ohm, 3W in parallel). -The PA transformer uses an ex-monitor line output transformer core. The secondary is 16turns of 1mm enamelled wire close-wound in the middle of the round leg of the core. The primaries are 2x 4t bifilar wound directly over the secondary. The wire used for the primaries was home-made "litz", consisting of 3 groups of 4x 0.3mm enamelled copper wires, with additional insulation of thin heat-shrink sleeving. I have now tried several ex-monitor LOPT cores for the output transformer; they all work well. The rest of the circuit is as shown in the original G0MRF design. The drive circuit and output filter is unchanged. With this arrangement, and DC input of about 37V, 12A, about 400W is obtained with efficiency something over 90%. The temperature rise was OK after 30 minutes continuous "key down" operation. As far as the DC input goes, as with switching mode amplifiers in general, the DC current is proportional to the DC voltage - in this case, the amplifier behaves like a 3.1 ohm resistor as far as the PSU is concerned. The power output varies as the square of the DC supply voltage, down to very low values. The waveforms in the circuit are less than ideal in comparison with a "text-book" current-fed class D amplifier. It is possible to improve efficiency and reduce harmonics somewhat by changing the PA output network and by further improvements to the output transformer to reduce leakage inductance. However the practical difference this makes is probably not very great, unless you are really striving for perfection. Cheers, Jim Moritz 73 de M0BMU ----- Original Message ----- From: Dick To: Sent: Tuesday, May 18, 2004 9:06 PM Subject: LF: output transformer problems > Hello all, > > due to circumstances I'll have less time to work on the transmitter. > > Meanwhile I tried several other transformers, as well as some > other things, like disconnecting the Scottky diodes and the 470nF > C's . > Now I have 6R8 from the TC4426 direct to the gates, which > are grounded with 47k resistor. > I tried all kind of things around the FET's with other C's to ground or > with C-R to ground etc. > Some progress has been made, but still difficult. > > The ouput filter seems to have a quite large influence on the over all > drain current. > Also the value of the capacitor that grounds the centre tap is important. > In my case I found better results at 330nF. > > Several available cores tested, like 3C11 (white) and 3E1 (green) both 36mm. > Also tried an T106-26 from an old computer SMPS. > > Wonder what current I should have when applying lower supply voltages > to the FET's. > For example. what currents to others have at 15V or 20V or so. > > 73, Dick, pa4vhf > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 43178 invoked from network); 21 May 2004 03:56:36 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 21 May 2004 03:56:36 -0000 Received: (qmail 8027 invoked from network); 21 May 2004 03:56:36 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 21 May 2004 03:56:31 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BR195-0001x9-A3 for dave@picks.force9.co.uk; Fri, 21 May 2004 03:56:31 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BR18J-0006gn-O5 for rs_out_1@blacksheep.org; Fri, 21 May 2004 04:55:43 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BR18J-0006ge-5E for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 04:55:43 +0100 Received: from magneto.esoterica.pt ([195.22.0.25]) by relay.salmark.net with esmtp (Exim 4.24) id 1BR7gr-0007Bq-CT for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 11:55:49 +0100 X-Fake-Domain: Slave_13.esoterica.pt Received: from Slave_13.esoterica.pt (adsl-norte02-1-177.vianw.pt [80.172.144.177]) by magneto.esoterica.pt (8.12.11/8.12.11) with ESMTP id i4L3tbWP007318 for ; Fri, 21 May 2004 04:55:37 +0100 Message-Id: <5.2.0.9.2.20040521035307.00bad218@pop.vianw.pt> X-Sender: nx4ywv@pop.vianw.pt X-Mailer: QUALCOMM Windows Eudora Version 5.2.0.9 Date: Fri, 21 May 2004 03:55:29 +0000 To: rsgb_lf_group@blacksheep.org From: Brian Rogerson In-Reply-To: <000401c43ea0$a6d54260$2201a8c0@k7t> References: <5.2.0.9.2.20040519074411.01fa5ab8@pop.vianw.pt> Mime-Version: 1.0 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Re: Off Topic---Decca Navigator Info? Content-Type: text/plain; charset=us-ascii; format=flowed X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit Many thanks Walter. The aerial socket measures 5v. Were they ferrite or e-field, this one has a suspicious looking threaded spigot at the top? 73, Brian CT1DRP At 19:28 20/05/2004, you wrote: >Brian, > >Sorry, haven't got the cct for this one but they were all broad-band devices >covering 70-127 kHz so should be OK for 136. Usually they needed 12v up the >coax. > >Walter G3JKV. > >----- Original Message ----- >From: "Brian Rogerson" >To: >Sent: Wednesday, May 19, 2004 8:49 AM >Subject: LF: Off Topic---Decca Navigator Info? > > > > Would be most grateful if anyone could give me any information on > > the active aerial for a Decca Yacht Navigator IV (badged Racal but > > displaying Philips when switched on). Brian CT1DRP > > > > > > >--- > >Checked by AVG anti-virus system (http://www.grisoft.com). >Version: 6.0.676 / Virus Database: 438 - Release Date: 03/05/04 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4772 invoked from network); 21 May 2004 15:43:20 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 21 May 2004 15:43:20 -0000 Received: (qmail 68731 invoked from network); 21 May 2004 15:43:18 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 21 May 2004 15:43:15 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BRCAz-000HUl-C9 for dave@picks.force9.co.uk; Fri, 21 May 2004 15:43:13 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BRCA6-00031z-Se for rs_out_1@blacksheep.org; Fri, 21 May 2004 16:42:18 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BRCA6-00031q-Aq for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 16:42:18 +0100 Received: from smarthost1.mail.uk.easynet.net ([212.135.6.11]) by relay.salmark.net with esmtp (Exim 4.24) id 1BRIiX-0000Jf-Az for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 23:42:17 +0100 Received: from apache3-wm.uk.easynet.net ([212.135.6.54]) by smarthost1.mail.uk.easynet.net with esmtp (Exim 4.10) id 1BRC9v-0009Dk-00 for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 16:42:07 +0100 Received: from www by apache3-wm.uk.easynet.net with local (Exim 3.36 #1) id 1BRC9v-000HIq-00 for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 16:42:07 +0100 Received: from 205.172.40.2 ([205.172.40.2]) by webmail.ukonline.net (IMP) with HTTP for ; Fri, 21 May 2004 16:42:07 +0100 Message-ID: <1085154127.40ae234fc2ea4@webmail.ukonline.net> Date: Fri, 21 May 2004 16:42:07 +0100 From: captbrian To: rsgb_lf_group@blacksheep.org References: <5.2.0.9.2.20040519074411.01fa5ab8@pop.vianw.pt> <000401c43ea0$a6d54260$2201a8c0@k7t> In-Reply-To: <000401c43ea0$a6d54260$2201a8c0@k7t> MIME-Version: 1.0 User-Agent: Internet Messaging Program (IMP) 3.2 X-Originating-IP: 205.172.40.2 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: Re: LF: Loran antennas Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 In florida keys,reception defeated by noise from power-lines on docked sail- boat but staring at the base-loading coils used with 8 foot whips for Loran . Most boats throwing these antennas away since GPS. Anyone confirm Loran frequency. Hence the Inductance of these now two-a-penny devices? Bryan on his hols G3GVB/Ac4UA Quoting Walter Blanchard : > Brian, > > Sorry, haven't got the cct for this one but they were all broad-band devices > covering 70-127 kHz so should be OK for 136. Usually they needed 12v up the > coax. > > Walter G3JKV. > > ----- Original Message ----- > From: "Brian Rogerson" > To: > Sent: Wednesday, May 19, 2004 8:49 AM > Subject: LF: Off Topic---Decca Navigator Info? > > > > Would be most grateful if anyone could give me any information on > > the active aerial for a Decca Yacht Navigator IV (badged Racal but > > displaying Philips when switched on). Brian CT1DRP > > > > > > > --- > > Checked by AVG anti-virus system (http://www.grisoft.com). > Version: 6.0.676 / Virus Database: 438 - Release Date: 03/05/04 > > > -- ---------------------------------------------- This mail sent through http://www.ukonline.net From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 99032 invoked from network); 21 May 2004 16:57:50 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 21 May 2004 16:57:50 -0000 Received: (qmail 34581 invoked from network); 21 May 2004 16:57:50 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 21 May 2004 16:57:48 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BRDLA-0008ev-CJ for dave@picks.force9.co.uk; Fri, 21 May 2004 17:57:48 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BRDKT-0003PG-2N for rs_out_1@blacksheep.org; Fri, 21 May 2004 17:57:05 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BRDKS-0003P7-Fd for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 17:57:04 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BRJsx-0000Qz-G7 for rsgb_lf_group@blacksheep.org; Sat, 22 May 2004 00:57:07 +0100 X-Fake-Domain: altair Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1BRDJy-0002eh-00 for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 17:56:34 +0100 X-No-DNS-For: 147.197.164.230 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1BRDJx-0007SH-00 for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 17:56:33 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Fri, 21 May 2004 17:56:28 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-UH-MailScanner: No Virus detected X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,TW_QR=0.077 Subject: LF: RE: looking for first signals ... Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dear Chris, LF Group, Didn't see your message until too late last night - but will hopefully transmit some beacon sigs from about 1900utc tonight on about 137.5kHz. Probably QRSS3 with CW identifier - maybe some PSK31 too, if I get round to it. Cheers, Jim Moritz 73 de M0BMU -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Christiaan Roselaar Sent: 20 May 2004 18:47 To: rsgb_lf_group@blacksheep.org Subject: LF: looking for first signals ... Hi All, Today I completed my loading coil. Can anyone help me reading my first signal on 136Khz please? I'm qrv most of the evening. 73's Chris PA3FUN From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 81614 invoked from network); 21 May 2004 21:10:17 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore02.plus.net with SMTP; 21 May 2004 21:10:17 -0000 Received: (qmail 84374 invoked from network); 21 May 2004 21:10:15 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 21 May 2004 21:10:12 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BRHHQ-000LI5-QO for dave@picks.force9.co.uk; Fri, 21 May 2004 21:10:12 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BRHGF-0004ws-ND for rs_out_1@blacksheep.org; Fri, 21 May 2004 22:08:59 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BRHGF-0004wj-A5 for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 22:08:59 +0100 Received: from mailout.zetnet.co.uk ([194.247.47.231]) by relay.salmark.net with esmtp (Exim 4.24) id 1BRNon-00010R-HX for rsgb_lf_group@blacksheep.org; Sat, 22 May 2004 05:09:05 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 3.36 #1 (Debian)) id 1BRHGC-0006Gk-00 for ; Fri, 21 May 2004 22:08:56 +0100 X-Fake-Domain: johnb5a82ea1a4 Received: from johnb5a82ea1a4 (bts-0553.dialup.zetnet.co.uk [194.247.50.41]) by zetnet.co.uk (8.12.11/8.12.11/Debian-4zet) with ESMTP id i4LL8q1j004823 for ; Fri, 21 May 2004 22:08:54 +0100 X-Bad-Message-ID: no DNS (johnb5a82ea1a4) Message-ID: <004601c43f77$d5b7b0e0$2932f7c2@johnb5a82ea1a4> From: "John Rabson" To: rsgb_lf_group@blacksheep.org References: <5.2.0.9.2.20040519074411.01fa5ab8@pop.vianw.pt> <000401c43ea0$a6d54260$2201a8c0@k7t> <1085154127.40ae234fc2ea4@webmail.ukonline.net> Date: Fri, 21 May 2004 22:08:49 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: Re: LF: Loran antennas Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 100kHz 73 John Rabson G3PAI ----- Original Message ----- From: "captbrian" > Most boats throwing these antennas away since GPS. Anyone confirm Loran > frequency. Hence the Inductance of these now two-a-penny devices? From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 66410 invoked from network); 21 May 2004 21:43:20 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 21 May 2004 21:43:20 -0000 Received: (qmail 12847 invoked from network); 21 May 2004 21:43:20 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 21 May 2004 21:43:19 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BRHnQ-0003CR-5l for dave@picks.force9.co.uk; Fri, 21 May 2004 21:43:16 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BRHmW-00058o-P7 for rs_out_1@blacksheep.org; Fri, 21 May 2004 22:42:20 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BRHmV-00058f-HA for rsgb_lf_group@blacksheep.org; Fri, 21 May 2004 22:42:19 +0100 Received: from mailout07.sul.t-online.com ([194.25.134.83]) by relay.salmark.net with esmtp (Exim 4.24) id 1BROL3-00013Y-IS for rsgb_lf_group@blacksheep.org; Sat, 22 May 2004 05:42:25 +0100 X-Fake-Domain: fwd01.aul.t-online.de Received: from fwd01.aul.t-online.de by mailout07.sul.t-online.com with smtp id 1BRHmR-0002hT-00; Fri, 21 May 2004 23:42:15 +0200 X-Fake-Domain: (VOqw7EZp8eVBD0q2vF46WvH1+qJahFBM1Sswj4PINVFvE1Dgct1QQl@[62.158.12.206]) Received: from (VOqw7EZp8eVBD0q2vF46WvH1+qJahFBM1Sswj4PINVFvE1Dgct1QQl@[62.158.12.206]) by fwd01.sul.t-online.com with smtp id 1BRHm7-0fUSWm0; Fri, 21 May 2004 23:41:55 +0200 From: jannsen <0482183881-0001@t-online.de> To: rsgb_lf_group@blacksheep.org References: X-Mailer: T-Online eMail 2.34 MIME-Version: 1.0 Date: Fri, 21 May 2004 23:41:55 +0200 Message-ID: <1BRHm7-0fUSWm0@fwd01.sul.t-online.com> X-Seen: false X-ID: VOqw7EZp8eVBD0q2vF46WvH1+qJahFBM1Sswj4PINVFvE1Dgct1QQl X-Spam-Score: 2.5 (++) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,FROM_STARTS_WITH_NUMS=1.574,TW_QR=0.077 Subject: Re: LF: RE: looking for first signals ... Content-Type: multipart/mixed; boundary="------------010807030803060009010406" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.4 required=5.0 tests=FROM_ENDS_IN_NUMS, FROM_STARTS_WITH_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 This is a multi-part message in MIME format. --------------010807030803060009010406 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit James Moritz schrieb: - maybe some PSK31 too, if I get round to > it. > > Cheers, Jim Moritz > 73 de M0BMU Hi Jim, your PSK signs are audible in jo43sv. but qrn makes them almost unreadable. see attachment. btw. what type of transmitter do you use for the PSK mode? 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ULKLZBHr1yLfOwgASyQkB3ZQfmwy7ypI27gB6xgelAUDoKAFrjdcsNQ1TxxZW0uiC68Py6Xd 2d5d/a1Tb55TK7M7/wDlioyP+ev+yc9lSYFAHn3/AAjuoT6v4g0KLSfsHh+40CHSrPUftKy4 2LIB+7zv489hyf8All1+YY0PDz+IdY8QLq2veHv7C+xWsttDH9tjuftHnNGzNlMbdvkr167+ 2K7HA9KMDOcUAeT2h8c3Wj3GgXfgf7HFfXVxIdR/taBzZGad5RMqDBZomcMMEElARtJGN/TN DuNX17XH8ReHxBbRa1DqWmT/AGwP5jxxLEr4Q5XAiDYfj95jHy5rudoxjFGB6UAct4DXWI9B uE1rSP7LuTf3MyQfaUnyksplzlOBgyFcf7Oe+K6qkwD2paACiiigAooooAKKKKACiiigAooo oAKKKKACiiigAooooAKKKKACiiigAooooAKKKKAP/9k= --------------010807030803060009010406-- From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 75768 invoked from network); 22 May 2004 01:15:29 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 22 May 2004 01:15:29 -0000 Received: (qmail 53100 invoked from network); 22 May 2004 01:15:29 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by 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bob2l2u6k2n1g3 Received: from bob2l2u6k2n1g3 ([219.89.176.229]) by web3-rme.xtra.co.nz with SMTP id <20040522011319.ZMRY3371.web3-rme.xtra.co.nz@bob2l2u6k2n1g3> for ; Sat, 22 May 2004 13:13:19 +1200 X-Bad-Message-ID: no DNS (bob2l2u6k2n1g3) Message-ID: <002101c43f99$fd7cfeb0$e901a8c0@bob2l2u6k2n1g3> From: "Vernall" To: rsgb_lf_group@blacksheep.org References: <003201c43d13$c22fc500$2102000a@ibm> <000f01c43ec9$9c9251c0$2e868751@rogersservices> Date: Sat, 22 May 2004 13:13:25 +1200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: ZL6QH/ZM2E on 26 June Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi all, We have changed the booking for the next Quartz Hill LF activity night, from Saturday 19 June to Saturday 26 June. We are developing a mixed programme involving: - DFCW120 beaconing most of the time - trying for a two way SSB contact with VK7 - trying for a LF/HF crossband contact with 3D2. Details of the schedule will be posted nearer the time. 73, Bob ZL2CA From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 75060 invoked from network); 22 May 2004 09:04:56 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 22 May 2004 09:04:56 -0000 Received: (qmail 62272 invoked from network); 22 May 2004 09:04:56 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 22 May 2004 09:04:55 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BRSR5-000G4z-3w for dave@picks.force9.co.uk; Sat, 22 May 2004 10:04:55 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BRSQE-0000vH-N4 for rs_out_1@blacksheep.org; Sat, 22 May 2004 10:04:02 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BRSQE-0000v8-4X for rsgb_lf_group@blacksheep.org; Sat, 22 May 2004 10:04:02 +0100 Received: from smtp800.mail.ukl.yahoo.com ([217.12.12.142]) by relay.salmark.net with smtp (Exim 4.24) id 1BRYym-0001jy-83 for rsgb_lf_group@blacksheep.org; Sat, 22 May 2004 17:04:08 +0100 X-Fake-Domain: unknown Received: from unknown (HELO rogersservices) (james.moritz@213.122.162.180 with login) by smtp800.mail.ukl.yahoo.com with SMTP; 22 May 2004 09:03:47 -0000 X-Bad-Message-ID: no DNS (rogersservices) Message-ID: <000b01c43fdb$02f64c20$b4a27ad5@rogersservices> From: "James Moritz" To: rsgb_lf_group@blacksheep.org References: <1BRHm7-0fUSWm0@fwd01.sul.t-online.com> Date: Sat, 22 May 2004 09:57:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-Spam-Score: 0.2 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1,TW_QR=0.077 Subject: Re: LF: RE: looking for first signals ... Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 > Hi Jim, > > your PSK signs are audible in jo43sv. but qrn makes them almost unreadable. > see attachment. > > btw. what type of transmitter do you use for the PSK mode? > > Uwe/dj8wx Dear Uwe, LF Group, Thanks for the report - I transmitted CW/QRSS3 from 1900 - 2100 and 2200 - 2300, and PSK31 from 2100 - 2200. As you observed, the drawback of PSK31 on LF is that every QRN impulse gives you a 50-50 chance of corrupting a bit, and so losing the character. A mode using error correction works better - like VE2IQ's "Coherent" program for example. The TX in use here is the usual class D Decca PA - to get a clean signal, I use an "envelope elimination and restoration" scheme, where the 136kHz drive to the PA is phase modulated, and amplitude modulation is applied to the DC feed to the PA. The phase keying signal is generated by the "Digimode terminal" in DL4YHF's Spectrum Lab software, and the envelope waveform is generated from the phase signal by external hardware. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 21318 invoked from network); 23 May 2004 18:45:40 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 23 May 2004 18:45:40 -0000 Received: (qmail 63458 invoked from network); 23 May 2004 18:45:40 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 23 May 2004 18:45:36 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BRxyY-000GBs-5I for dave@picks.force9.co.uk; Sun, 23 May 2004 18:45:34 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BRxx5-0008Ds-7Q for rs_out_1@blacksheep.org; Sun, 23 May 2004 19:44:03 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BRxx2-0008Dj-IX for rsgb_lf_group@blacksheep.org; Sun, 23 May 2004 19:44:00 +0100 Received: from [62.41.128.11] (helo=kaliber.flexi-surf.co.uk) by relay.salmark.net with esmtp (Exim 4.24) id 1BS4Va-0005bk-JJ for rsgb_lf_group@blacksheep.org; Mon, 24 May 2004 02:44:06 +0100 X-Fake-Domain: y6m8a2 Received: from y6m8a2 (host81-7-54-145.surfport24.v21.co.uk [81.7.54.145]) by kaliber.flexi-surf.co.uk (8.10.2/8.10.2) with SMTP id i4NIhhs21704 for ; Sun, 23 May 2004 19:43:47 +0100 X-Bad-Message-ID: no DNS (y6m8a2) Message-ID: <000f01c440f6$a02db8e0$91360751@y6m8a2> From: "Frederick John Armstrong" To: "lf group" Date: Sun, 23 May 2004 19:48:47 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2314.1300 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2314.1300 X-Spam-Score: 0.7 (/) X-Spam-Report: autolearn=no,HTML_20_30=0.474,HTML_MESSAGE=0.001,RCVD_IN_SORBS=0.1,TW_CQ=0.077 Subject: LF: CQs on 136 Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Content-transfer-encoding: 8bit
Hello again folks.
 
I have been sending copious cqs during the week and especially today, Sunday, morning. No reports of being heard so I wonder did anyone out there hear my signals I wonder?
 
I have made improvements to my antenna since I had contacts with Jim M0BMU and Tom, G3OLB last weekend and thanks to you both for the encouraging reports.
 
Since then I have put a second wire on the horizontal part to increase the capacitance ans it made quite a difference to the loading coil turns to achieve resonance with an increase in antenna current.  I have also increased the height of the top wires to 50 ft so I did think I would be getting somewhere. Maybe you were all outside enjoyong the sun and who could blame you?
 
Will be continuing with the calls as and when I can so if you hear me would you please report to me?
 
Thanks and 73 from John, G3JRL, Weymouth.
From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 15758 invoked from network); 24 May 2004 15:21:37 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 24 May 2004 15:21:37 -0000 Received: (qmail 89958 invoked from network); 24 May 2004 15:21:36 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 24 May 2004 15:21:26 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BSHGY-000Lsa-F1 for dave@picks.force9.co.uk; Mon, 24 May 2004 15:21:26 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BSHFX-0003GD-Ve for rs_out_1@blacksheep.org; Mon, 24 May 2004 16:20:23 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BSHFX-0003G4-88 for rsgb_lf_group@blacksheep.org; Mon, 24 May 2004 16:20:23 +0100 Received: from mailout.zetnet.co.uk ([194.247.47.231]) by relay.salmark.net with esmtp (Exim 4.24) id 1BSNnx-0007Uf-Ql for rsgb_lf_group@blacksheep.org; Mon, 24 May 2004 23:20:21 +0100 Received: from irwell.zetnet.co.uk ([194.247.47.48] helo=zetnet.co.uk) by mailout.zetnet.co.uk with esmtp (Exim 3.36 #1 (Debian)) id 1BSHFM-0002GQ-00 for ; Mon, 24 May 2004 16:20:12 +0100 X-Fake-Domain: johnb5a82ea1a4 Received: from johnb5a82ea1a4 (bts-0872.dialup.zetnet.co.uk [194.247.51.104]) by zetnet.co.uk (8.12.11/8.12.11/Debian-4zet) with ESMTP id i4OFFenT015140 for ; Mon, 24 May 2004 16:15:57 +0100 X-Bad-Message-ID: no DNS (johnb5a82ea1a4) Message-ID: <003401c441a2$0a8ee1e0$6833f7c2@johnb5a82ea1a4> From: "John Rabson" To: rsgb_lf_group@blacksheep.org Date: Mon, 24 May 2004 16:06:19 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: GBR SK - long live GBR/M Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Pages 50-52 of The Journal of the Communications Network for October-December 2003 has an article on "Realising a Quarter Wavelength Vertical Monopole at Low Frequencies - by Balloon". It describes a vehicle-mounted system with a helium-filled balloon capable of supporting a 1500m vertical. Operation on the move is not expected. 73 John Rabson G3PAI From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 94055 invoked from network); 25 May 2004 14:54:32 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 25 May 2004 14:54:32 -0000 Received: (qmail 27886 invoked from network); 25 May 2004 14:54:30 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 25 May 2004 14:54:15 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BSdJn-0005wy-4v for dave@picks.force9.co.uk; Tue, 25 May 2004 14:54:15 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BSdHt-0003Vq-LE for rs_out_1@blacksheep.org; Tue, 25 May 2004 15:52:17 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BSdHt-0003Vh-4q for rsgb_lf_group@blacksheep.org; Tue, 25 May 2004 15:52:17 +0100 Received: from m11.lax.untd.com ([64.136.30.74]) by relay.salmark.net with smtp (Exim 4.24) id 1BSjqJ-0001Ve-Fr for rsgb_lf_group@blacksheep.org; Tue, 25 May 2004 22:52:15 +0100 X-UNTD-OriginStamp: yokUgcxCbtTP7XLrpefewDDPTfPNhPgBioI1yzDJSEF8CDy5YBh0GA== Received: (from riese-k3djc@juno.com) by m11.lax.untd.com (jqueuemail) id JWGZDYXT; Tue, 25 May 2004 07:51:48 PDT To: rsgb_lf_group@blacksheep.org Date: Tue, 25 May 2004 10:44:44 -0400 Message-ID: <20040525.105057.2600.2.riese-k3djc@juno.com> X-Mailer: Juno 5.0.13 MIME-Version: 1.0 From: riese-k3djc@juno.com X-Spam-Score: 0.3 (/) X-Spam-Report: autolearn=no,NO_REAL_NAME=0.285 Subject: LF: ping Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 K3DJC From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 26437 invoked from network); 25 May 2004 16:27:19 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore01.plus.net with SMTP; 25 May 2004 16:27:19 -0000 Received: (qmail 68197 invoked from network); 25 May 2004 16:27:19 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 25 May 2004 16:27:16 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BSelo-000HFb-EU for dave@picks.force9.co.uk; Tue, 25 May 2004 16:27:16 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BSel4-0005Id-VT for rs_out_1@blacksheep.org; Tue, 25 May 2004 17:26:30 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BSel4-0005IU-C5 for rsgb_lf_group@blacksheep.org; Tue, 25 May 2004 17:26:30 +0100 Received: from smtp04.ya.com ([62.151.11.162] helo=smtp.ya.com) by relay.salmark.net with esmtp (Exim 4.24) id 1BSlJU-0001fa-Pt for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 00:26:28 +0100 Received: from [62.151.100.85] (helo=waterhole) by smtp.ya.com with smtp id 1BSekp-0001Jm-00 for rsgb_lf_group@blacksheep.org; Tue, 25 May 2004 18:26:15 +0200 X-Bad-Message-ID: no DNS (waterhole) Message-ID: <002b01c44275$0eaea570$5564973e@waterhole> From: "Miguel A. Vallejo" To: rsgb_lf_group@blacksheep.org References: <20040525.105057.2600.2.riese-k3djc@juno.com> Date: Tue, 25 May 2004 18:26:37 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: Re: ping Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 PONG! from EA4EOZ :-) From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 52709 invoked from network); 25 May 2004 20:01:34 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 25 May 2004 20:01:34 -0000 Received: (qmail 2935 invoked from network); 25 May 2004 20:01:33 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 25 May 2004 20:01:23 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BSi71-000PvY-H5 for dave@picks.force9.co.uk; Tue, 25 May 2004 21:01:23 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BSi5h-000141-De for rs_out_1@blacksheep.org; Tue, 25 May 2004 21:00:01 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BSi5g-00013s-Tj for rsgb_lf_group@blacksheep.org; Tue, 25 May 2004 21:00:00 +0100 Received: from postbode03.zonnet.nl ([62.58.50.90]) by relay.salmark.net with esmtp (Exim 4.24) id 1BSoe7-00023g-81 for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 03:59:59 +0100 Received: (qmail 25167 invoked by uid 10); 25 May 2004 19:59:43 -0000 Received: (vexira-qq 25021-B5B2E0D8 invoked from network) 25 May 2004 21:59:42 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.155.16]) (envelope-sender ) by postbode03.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 25 May 2004 19:59:42 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000501c44291$64675040$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Tue, 25 May 2004 21:00:09 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.59; VDF: 6.25.0.76; host: postbode02.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: G0MRF-TX-ouput circuit troubles Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello all, Last weeks I spend a lot of time rewindg transformers, changing the circuit time after time, and even changing the FET's. All in all I have little progess sofar.............. Maybe there is an error in the schematic, from which I do not know. The output transformer and some of the surrounding components seem to play a key role in the results obtained. I tried the tip Jim, M0BMU gave, with 2x4t bifilair (made of 3x4x0.3mm wire) as primaire coil, and 16 turns secundair. This coil didn't gave the results I expected. I found an primairy inductance of 150uH , between the two outher wires and 37uH between the centre tap and each outher wire. The secundairry inductance around 600uH. The best results I obtained with an 36mm green 3E1 core. Primairy 2 times 8 turns bifilair, inductance 900uH Secundairy wound on top of it 15 turns, inductance 814uH. (I don't think this core can withstand 400Watt...... Ui=4000 about twice as much as from a 3C90 core) It seems that an almost 1:1 transformer gives the best results. When measuring/compairing both transformers with an impedance bridge/noise source I found in both cases a strong 50Ohm dip in the 8-11MHz region, however the M0BMU transformer wound on an ex-monitor core gave also another dip of about 500Ohm around 1400kHz. I am testing with a variable supply voltage to the FET's, and I think for 50V/10A I should find somewhere around 4A at 20V......... Maybe somebody has something to say about this...... 73 Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 51742 invoked from network); 26 May 2004 12:42:45 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 26 May 2004 12:42:45 -0000 Received: (qmail 59760 invoked from network); 26 May 2004 12:42:43 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 26 May 2004 12:42:10 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BSxiW-000CHF-CY for dave@picks.force9.co.uk; Wed, 26 May 2004 12:42:10 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BSxhF-0004O2-EP for rs_out_1@blacksheep.org; Wed, 26 May 2004 13:39:49 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BSxhE-0004Nt-Om for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 13:39:48 +0100 Received: from imo-m20.mx.aol.com ([64.12.137.1]) by relay.salmark.net with esmtp (Exim 4.24) id 1BT4Fe-0003q9-D3 for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 20:39:46 +0100 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m20.mx.aol.com (mail_out_v37_r1.3.) id l.53.cd0d8a2 (4394) for ; Wed, 26 May 2004 08:39:19 -0400 (EDT) From: G0MRF@aol.com Message-ID: <53.cd0d8a2.2de5e9f7@aol.com> Date: Wed, 26 May 2004 08:39:19 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 for Windows sub 631 X-Spam-Score: 2.4 (++) X-Spam-Report: autolearn=no,DATE_IN_PAST_06_12=0.599,HTML_20_30=0.474,HTML_MESSAGE=0.001,MAILTO_TO_SPAM_ADDR=1.052,NO_REAL_NAME=0.285 Subject: Re: LF: G0MRF-TX-ouput circuit troubles Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.8 required=5.0 tests=HTML_20_30,HTML_MESSAGE, MAILTO_TO_SPAM_ADDR,NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit
In a message dated 25/05/2004 22:01:42 Central Europe Standard Time, knaap159@zonnet.nl writes:

Maybe somebody has something to say about this......

 
I think you're spending too much time measuring things at frequencies that are not LF. It's a great analysis of the detail, but I can't help thinking you are overlooking an obvious fault.
BTW.  What is the output power? The supply Voltage? and the efficiency?
 
Just concentrate on the basics. The circuit works, but if you start removing diodes adding resistors etc, then there's not much anyone can do to help as you are now developing your own circuit and not trying to duplicate mine.
 
Build the circuit as close to the original as you can.
Check you have the correct waveforms at the gates. (keep wire lengths short. This maybe 136kHz, but the waveform rise and fall time neeed to be fast. Around the HEF4013, FET driver and FETs, the construction should be consistent with good VHF practice ) 
 
Measure the 136kHz output power, the supply voltage and calculate efficiency.
 
Then you'll have a benchmark of performance. If you have less than 200W output from a 36V supply or an efficiency less than 60% then you have a fault in a component or in the construction that you need to find.
 
After you have a reasonable benchmark, change one thing at a time and compare. If you have an improvement, leave it in circuit. If you don't, then put it back as before and try something else. Jim's work on the transformer is excellent and I'm now comparing my original transformer with a version of Jim's built on a 3C90 42mm core as supplied in the kit.
 
I've built versions of this circuit from 400W at 73k to 700W (4 FETs) at 136kHz. There's even a version running in the Medium waveband around 1200kHz.
 
Good luck
 
David   G0MRF
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 48044 invoked from network); 26 May 2004 13:46:04 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore04.plus.net with SMTP; 26 May 2004 13:46:04 -0000 Received: (qmail 77000 invoked from network); 26 May 2004 13:46:03 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 26 May 2004 13:46:00 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BSyjI-000JIo-Kd for dave@picks.force9.co.uk; Wed, 26 May 2004 13:46:00 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BSyiF-0005ha-Nl for rs_out_1@blacksheep.org; Wed, 26 May 2004 14:44:55 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BSyiF-0005hP-0B for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 14:44:55 +0100 Received: from hestia.herts.ac.uk ([147.197.200.9]) by relay.salmark.net with esmtp (Exim 4.24) id 1BT5Ga-0003xZ-FA for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 21:44:48 +0100 X-Fake-Domain: altair Received: from altair ([147.197.200.45] helo=altair.herts.ac.uk) by hestia.herts.ac.uk with esmtp (Exim 3.22 #1) id 1BSygx-0006Ga-00 for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 14:43:35 +0100 X-No-DNS-For: 147.197.164.230 Received: from [147.197.164.230] (helo=JamesMorrits) by altair.herts.ac.uk with esmtp (Exim 3.36 #1) id 1BSygw-0006Pq-00 for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 14:43:34 +0100 From: "James Moritz" To: rsgb_lf_group@blacksheep.org Date: Wed, 26 May 2004 14:43:33 +0100 Message-ID: MIME-Version: 1.0 X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-UH-MailScanner: No Virus detected X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: RE: G0MRF-TX-ouput circuit troubles Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Dear Dick, LF Group, >Maybe there is an error in the schematic, from which I do not know. I am not aware of one... >The output transformer and some of the surrounding components seem >to play a key role in the results obtained. Certainly true... >I tried the tip Jim, M0BMU gave, with 2x4t bifilair (made of 3x4x0.3mm >wire) >as primaire coil, and 16 turns secundair. >This coil didn't gave the results I expected. >I found an primairy inductance of 150uH , between the two outher wires and >37uH between the centre tap and each outher wire. >The secundairry inductance around 600uH. These values are almost identical to what I got for my transformer, and are quite sensible for this circuit. But note that, if you use this transformer, it is absolutely essential to do the other circuit mods I mentioned at the same time (i.e., eliminate C23, increase choke value, replace 10n drain capacitors with series RC), otherwise things will be made worse rather than better. Examining the waveforms with an oscilloscope will reveal whether things are working properly or not. The gate drive waveform should be a slightly rounded-off square wave about 12v pk-pk, while the drain voltage should be a sort of half-wave rectified sine wave with peak amplitude roughly 3 times the DC supply voltage (although it will also contain some switching spikes, and if using the original 'MRF output filter, you actually get a bit more than half a sine wave cycle). If you have a current probe (or make a suitable current transformer), the source current should be approximately a square wave (probably with some ringing at the leading edge), with an amplitude equal to the DC input current. The waveforms for both MOSFETs should be identical, but 180degrees out of phase of course. The voltage at the transformer secondary will be roughly sinusoidal, with peak amplitude close to 4 times the drain waveform amplitude. In the original circuit, I found the waveforms had multiple peaks for each cycle of the input drive signal, due to resonances at higher frequencies involving the transformer leakage inductance, the MOSFET capacitance and the other capacitors in the circuit. The amplitudes of these higher frequencies were larger than the 137kHz signal. The filter prevents most of these harmonics reaching the load, so there was still substantial 137kHz output, but the higher frequency signal components circulating in the PA led to greatly increased losses and reduced efficiency. Cheers, Jim Moritz 73 de M0BMU From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 11090 invoked from network); 26 May 2004 18:14:19 -0000 Received: from unknown (HELO ptb-mxscan03.plus.net) (212.159.14.237) by ptb-mailstore02.plus.net with SMTP; 26 May 2004 18:14:19 -0000 Received: (qmail 82657 invoked from network); 26 May 2004 18:14:18 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore03.plus.net (212.159.14.217) by ptb-mxscan03.plus.net with SMTP; 26 May 2004 18:14:09 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore03.plus.net with esmtp (Exim) id 1BT2un-000KSe-NH for dave@picks.force9.co.uk; Wed, 26 May 2004 19:14:09 +0100 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BT2tT-0002pr-5e for rs_out_1@blacksheep.org; Wed, 26 May 2004 19:12:47 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BT2tR-0002pi-8M for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 19:12:45 +0100 Received: from outbound05.telus.net ([199.185.220.224] helo=priv-edtnes42.telusplanet.net) by relay.salmark.net with esmtp (Exim 4.24) id 1BT9Rq-0004QU-Hf for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 02:12:42 +0100 Received: from localhost ([199.185.220.240]) by priv-edtnes42.telusplanet.net (InterMail vM.6.00.05.02 201-2115-109-103-20031105) with ESMTP id <20040526181227.TIL1854.priv-edtnes42.telusplanet.net@localhost> for ; Wed, 26 May 2004 12:12:27 -0600 Received: from 204.174.12.17 ( [204.174.12.17]) as user sthed475@192.168.200.1 by webmail.telus.net with HTTP; Wed, 26 May 2004 11:12:27 -0700 Message-ID: <1085595147.40b4de0b1a742@webmail.telus.net> Date: Wed, 26 May 2004 11:12:27 -0700 From: "Scott Tilley, VE7TIL" To: rsgb_lf_group@blacksheep.org References: <53.cd0d8a2.2de5e9f7@aol.com> In-Reply-To: <53.cd0d8a2.2de5e9f7@aol.com> MIME-Version: 1.0 User-Agent: Internet Messaging Program (IMP) 3.1-cvs X-Originating-IP: 204.174.12.17 X-Spam-Score: 1.9 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,MAILTO_TO_SPAM_ADDR=1.052 Subject: Re: LF: G0MRF-TX-ouput circuit troubles Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.9 required=5.0 tests=FROM_ENDS_IN_NUMS, MAILTO_TO_SPAM_ADDR autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 David I have been examiming your drive cct from the FET driver to the gate of the FETs. In this cct you have a cap., a diode with the anode to common this node connects to a 10ohm resistor in series with the gate that has the gate side tacked to common via a 4.7k resistor. Am I correct in assuming that the purpose of the cap is to prevent DC voltages from getting to the gates of the FETs in the case of an exciter failure? Is the 4.7K just there to keep undue charge off the gate capacitance? Also, what is the design intent of the 'fast' diode you have installed. I am also curious as to what the waveform will look like out of this driver circuit. Is it a 12V p-p from common to 12V or is it something else. Thanks for any insight you can offer. Regards, Scott, VE7TIL Quoting G0MRF@aol.com: > In a message dated 25/05/2004 22:01:42 Central Europe Standard Time, > knaap159@zonnet.nl writes: > > > Maybe somebody has something to say about this...... > > > I think you're spending too much time measuring things at frequencies that > > are not LF. It's a great analysis of the detail, but I can't help thinking > you > are overlooking an obvious fault. > BTW. What is the output power? The supply Voltage? and the efficiency? > Just concentrate on the basics. The circuit works, but if you start removing > > diodes adding resistors etc, then there's not much anyone can do to help as > > you are now developing your own circuit and not trying to duplicate mine. > Build the circuit as close to the original as you can. > Check you have the correct waveforms at the gates. (keep wire lengths short. > > This maybe 136kHz, but the waveform rise and fall time neeed to be fast. > Around the HEF4013, FET driver and FETs, the construction should be > consistent > with good VHF practice ) > Measure the 136kHz output power, the supply voltage and calculate > efficiency. > Then you'll have a benchmark of performance. If you have less than 200W > output from a 36V supply or an efficiency less than 60% then you have a fault > in > a component or in the construction that you need to find. > After you have a reasonable benchmark, change one thing at a time and > compare. If you have an improvement, leave it in circuit. If you don't, then > put it > back as before and try something else. Jim's work on the transformer is > excellent and I'm now comparing my original transformer with a version of > Jim's > built on a 3C90 42mm core as supplied in the kit. > I've built versions of this circuit from 400W at 73k to 700W (4 FETs) at > 136kHz. There's even a version running in the Medium waveband around > 1200kHz. > Good luck > David G0MRF > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 32745 invoked from network); 26 May 2004 20:25:44 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore03.plus.net with SMTP; 26 May 2004 20:25:44 -0000 Received: (qmail 10948 invoked from network); 26 May 2004 20:25:44 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 26 May 2004 20:25:42 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BT4y6-0002TI-DP for dave@picks.force9.co.uk; Wed, 26 May 2004 20:25:42 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BT4x4-0005TM-Db for rs_out_1@blacksheep.org; Wed, 26 May 2004 21:24:38 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BT4x3-0005TB-Uh for rsgb_lf_group@blacksheep.org; Wed, 26 May 2004 21:24:38 +0100 Received: from postbode03.zonnet.nl ([62.58.50.90]) by relay.salmark.net with esmtp (Exim 4.24) id 1BTBVY-0004jL-51 for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 04:24:40 +0100 Received: (qmail 18474 invoked by uid 10); 26 May 2004 20:24:22 -0000 Received: (vexira-qq 18010-9C369DBE invoked from network) 26 May 2004 22:24:17 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.230]) (envelope-sender ) by postbode03.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 26 May 2004 20:24:17 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <000501c4435d$fd8221c0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Wed, 26 May 2004 22:13:05 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.59; VDF: 6.25.0.77; host: postbode02.zonnet.nl) X-Spam-Score: 2.3 (++) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,PLING_PLING=1.325,RCVD_IN_SORBS=0.1 Subject: LF: good news: it finally works!!!!! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: ** X-Spam-Status: No, hits=2.2 required=5.0 tests=FROM_ENDS_IN_NUMS,PLING_PLING autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Well tonight I finally managed to get the G0MRF transmitter running fine!!! Great to get this far after all the frustrating weeks of experimenting etc......... I took apart another monitor HV-transformer and used this core. I am not sure what caused the problem, but maybe it was because I used an core with no air gap at all. The new core has 2 very thin air gaps, because of the glue I used. This gives lowe inductance, but anyway it works, and thats what counts. Tests has been done at 20V drainvoltage only, and results are very very promising, with efficiency over 90%!! (DCinput vs. RF output) System behaves like an 6.2 Ohm resistor, which will give around 8A drain current at 50V. Next step will be trying to get the SWR protection circuit running, and after that I'll go for 'power' tests on 50V. I would like to thank everybody for their contributions, like answering my questions and giving tips etc. 73! Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 4345 invoked from network); 27 May 2004 00:11:33 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 27 May 2004 00:11:33 -0000 Received: (qmail 14767 invoked from network); 27 May 2004 00:11:32 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 27 May 2004 00:11:06 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BT8UD-000DEz-PX for dave@picks.force9.co.uk; Thu, 27 May 2004 00:11:05 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BT8Rv-0001lV-0m for rs_out_1@blacksheep.org; Thu, 27 May 2004 01:08:43 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BT8Ru-0001lM-KZ for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 01:08:42 +0100 X-Fake-Domain: virus-out.ttyl.com Received: from virus-out.ttyl.com ([193.212.240.200] helo=scan.telenor.net) by relay.salmark.net with esmtp (Exim 4.24) id 1BTF0S-000572-7H for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 08:08:48 +0100 X-Fake-Domain: tns-fbu-22-208.corp.telenor.no Received: from tns-fbu-22-208.corp.telenor.no ([134.47.162.90] [134.47.162.90]) by scan.telenor.net with ESMTP for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 02:08:25 +0200 X-Fake-Domain: tns-fbu-22-213.corp.telenor.no Received: from tns-fbu-22-213.corp.telenor.no ([134.47.162.191]) by tns-fbu-22-208.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.6713); Thu, 27 May 2004 02:08:25 +0200 X-Fake-Domain: TNS-FBU-2E-006.corp.telenor.no Received: from TNS-FBU-2E-006.corp.telenor.no ([134.47.162.86]) by tns-fbu-22-213.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.6713); Thu, 27 May 2004 02:08:25 +0200 X-MimeOLE: Produced By Microsoft Exchange V6.0.6487.1 content-class: urn:content-classes:message Date: Thu, 27 May 2004 02:08:24 +0200 X-Bad-Message-ID: no DNS (TNS-FBU-2E-006.corp.telenor.no) Message-Id: Thread-Topic: output transfomer--BINGO!!!! Thread-Index: AcQ4aWA3BFw+0nEdT9q2EIgSr0yCGgLFOSWw X-Bad-From: No DNS (telenor.com) From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org X-OriginalArrivalTime: 27 May 2004 00:08:25.0183 (UTC) FILETIME=[BAC80EF0:01C4437E] MIME-Version: 1.0 X-Spam-Score: 1.6 (+) X-Spam-Report: autolearn=no,NO_REAL_NAME=0.285,PLING_PLING=1.325 Subject: LF: RE: output transfomer--BINGO!!!! Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.6 required=5.0 tests=NO_REAL_NAME,PLING_PLING autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 5 Hi I put some info about selecting ferrite cores on http://www.noding.com/la8ak/12345/n12.htm It should apply for any transmitter LA7MI wrote the notes because he felt that the info was not available, and all including Helge Granberg used too much math to describe how to search for the proper ferrite material 73 Jan-Martin LA8AK --- J M Nøding, Datakvalitet, TTS, Kristiansand From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 90658 invoked from network); 27 May 2004 08:40:48 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore01.plus.net with SMTP; 27 May 2004 08:40:48 -0000 Received: (qmail 26840 invoked from network); 27 May 2004 08:40:47 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 27 May 2004 08:40:43 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BTGRO-0006aC-VO for dave@picks.force9.co.uk; Thu, 27 May 2004 08:40:43 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BTGQL-0004KH-IR for rs_out_1@blacksheep.org; Thu, 27 May 2004 09:39:37 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BTGQL-0004K8-61 for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 09:39:37 +0100 Received: from one.surfree.co.uk ([195.80.0.234]) by relay.salmark.net with esmtp (Exim 4.24) id 1BTMys-0005ui-ME for rsgb_lf_group@blacksheep.org; Thu, 27 May 2004 16:39:42 +0100 X-Fake-Domain: standalone Received: from standalone ([212.248.140.44]) by one.surfree.co.uk (8.9.3/8.9.3) with SMTP id KAA31690 for ; Thu, 27 May 2004 10:38:11 +0100 Received: by localhost with Microsoft MAPI; Thu, 27 May 2004 09:37:45 +0100 Message-ID: <01C443CE.43B02DC0.actalbot@southsurf.com> From: Andy To: "'rsgb_lf_group@blacksheep.org'" Date: Thu, 27 May 2004 09:37:00 +0100 Importance: high X-Priority: 1 (Highest) Organization: UKNWN(UK) X-Mailer: Microsoft Internet E-mail/MAPI - 8.0.0.4211 MIME-Version: 1.0 X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1,X_PRIORITY_HIGH=0.516 Subject: LF: RE: Strange signal at 22,470 KHz Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.5 required=5.0 tests=X_PRIORITY_HIGH autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Looks interesting. Can you generate a .WAV file next time you hear it - then we can try analysing it. Andy G4JNT -----Original Message----- From: PY3CRX PY2PLL [SMTP:py2pll@py.qsl.br] Sent: 2004/05/27 00:17 To: VLF_Group@yahoogroups.com Subject: LF: Strange signal at 22,470 KHz << File: ATT00000.txt; charset = Windows-1252 >> From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 13659 invoked from network); 29 May 2004 00:05:48 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 29 May 2004 00:05:48 -0000 Received: (qmail 55695 invoked from network); 29 May 2004 00:05:47 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 29 May 2004 00:05:39 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BTrM2-000DOr-Mw for dave@picks.force9.co.uk; Sat, 29 May 2004 00:05:38 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BTrKE-0004kJ-EY for rs_out_1@blacksheep.org; Sat, 29 May 2004 01:03:46 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BTrKC-0004kA-QV for rsgb_lf_group@blacksheep.org; Sat, 29 May 2004 01:03:44 +0100 Received: from email02.skyonline.com.br ([200.105.9.66] helo=webmail.ositeisp.com.br) by relay.salmark.net with esmtp (Exim 4.24) id 1BTxsj-0005AJ-6K for rsgb_lf_group@blacksheep.org; Sat, 29 May 2004 08:03:49 +0100 Received: from webmail.skyonline.com.br (fw02.skyonline.com.br [127.0.0.1]) by webmail.ositeisp.com.br (Postfix) with ESMTP id 0EDD72B1D1 for ; Fri, 28 May 2004 21:03:27 -0300 (BRT) X-Fake-Domain: local Received: from local ([::ffff:200.100.90.19]) (AUTH: LOGIN mramos@osite.com.br) by webmail.skyonline.com.br with esmtp; Fri, 28 May 2004 21:03:25 -0300 X-Bad-Message-ID: no DNS (local) Message-ID: <000801c44510$63bde880$6464a8c0@local> From: "PY3CRX PY2PLL" To: rsgb_lf_group@blacksheep.org References: <01C443CE.43B02DC0.actalbot@southsurf.com> Date: Thu, 27 May 2004 21:32:43 -0300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.4 (/) X-Spam-Report: autolearn=no,DATE_IN_PAST_12_24=0.385 Subject: LF: Re: RE: Strange signal at 22,470 KHz Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.4 required=5.0 tests=DATE_IN_PAST_12_24 autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi Andy ... Yes, I can ... was very noisy anyway but I spent too much time setting Spectran to enhance the effect on screen and forgot record a sample audio file :o( 73 Marcus, PY3CRX/PY2PLL GG66rf http://py.qsl.br Active from "DC" to 24GHz ----- Original Message ----- From: "Andy" To: Sent: 27 May, 2004 05:37 Subject: LF: RE: Strange signal at 22,470 KHz > Looks interesting. Can you generate a .WAV file next time you hear it - then > we can try analysing it. > > Andy G4JNT > > > -----Original Message----- > From: PY3CRX PY2PLL [SMTP:py2pll@py.qsl.br] > Sent: 2004/05/27 00:17 > To: VLF_Group@yahoogroups.com > Subject: LF: Strange signal at 22,470 KHz > > << File: ATT00000.txt; charset = Windows-1252 >> > > From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9408 invoked from network); 29 May 2004 01:19:57 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 29 May 2004 01:19:57 -0000 Received: (qmail 64105 invoked from network); 29 May 2004 01:19:57 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 29 May 2004 01:19:54 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BTsVs-000GXl-7E for dave@picks.force9.co.uk; Sat, 29 May 2004 01:19:52 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BTsUw-0006SW-Rk for rs_out_1@blacksheep.org; Sat, 29 May 2004 02:18:54 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BTsUw-0006SN-EW for rsgb_lf_group@blacksheep.org; Sat, 29 May 2004 02:18:54 +0100 Received: from email02.skyonline.com.br ([200.105.9.66] helo=webmail.ositeisp.com.br) by relay.salmark.net with esmtp (Exim 4.24) id 1BTz3S-0005OC-Ph for rsgb_lf_group@blacksheep.org; Sat, 29 May 2004 09:18:59 +0100 Received: from webmail.skyonline.com.br (fw02.skyonline.com.br [127.0.0.1]) by webmail.ositeisp.com.br (Postfix) with ESMTP id 64AED2B1D4 for ; Fri, 28 May 2004 22:18:44 -0300 (BRT) X-Fake-Domain: local Received: from local ([::ffff:200.100.92.35]) (AUTH: LOGIN mramos@osite.com.br) by webmail.skyonline.com.br with esmtp; Fri, 28 May 2004 22:18:42 -0300 X-Bad-Message-ID: no DNS (local) Message-ID: <000f01c4451a$e7edbcc0$6464a8c0@local> From: "PY3CRX PY2PLL" To: VLF_Group@yahoogroups.com, "VLF" Date: Fri, 28 May 2004 22:14:48 -0300 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=no, Subject: LF: 21.1KHz = two more files ... Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi there ... Yesterday night (03:00 UTC more or less) some new signals on 21.1. There´s two files, one of them is the 3rd audio sample of the morse transmition (may 26th) at http://py.qsl.br/fskmorse3.mp3 . The second one (http://py.qsl.br/21_1K0001.jpg) is the Spectran snapshot of another ongoing test at this frequency. There is 5 carriers, the 3rd one at 21.1KHz (700Hz). Too much man made noise yesterday but it´s clear the signal at 700Hz (21.1KHz), signal above is 21.4KHz and below is 20.9KHz. Some moments after this "burst", started an 83Hz shift FSK (???) emission ... 73 Marcus, PY3CRX/PY2PLL GG66rf http://py.qsl.br Active from "DC" to 24GHz From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 9019 invoked from network); 29 May 2004 20:23:34 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 29 May 2004 20:23:34 -0000 Received: (qmail 66601 invoked from network); 29 May 2004 20:23:34 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 29 May 2004 20:23:33 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BUAMf-000H8j-0u for dave@picks.force9.co.uk; Sat, 29 May 2004 20:23:33 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BUALa-0004ss-Pq for rs_out_1@blacksheep.org; Sat, 29 May 2004 21:22:26 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BUALa-0004sj-4z for rsgb_lf_group@blacksheep.org; Sat, 29 May 2004 21:22:26 +0100 Received: from imo-m20.mx.aol.com ([64.12.137.1]) by relay.salmark.net with esmtp (Exim 4.24) id 1BUGu6-0002DR-Hk for rsgb_lf_group@blacksheep.org; Sun, 30 May 2004 04:22:30 +0100 X-Fake-Domain: G0MRF@aol.com Received: from G0MRF@aol.com by imo-m20.mx.aol.com (mail_out_v37_r1.3.) id l.d5.df7b15e (3940) for ; Sat, 29 May 2004 16:22:10 -0400 (EDT) From: G0MRF@aol.com Message-ID: Date: Sat, 29 May 2004 16:22:10 EDT To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 X-Mailer: 9.0 for Windows sub 631 X-Spam-Score: 1.7 (+) X-Spam-Report: autolearn=no,DATE_IN_PAST_06_12=0.599,HTML_30_40=0.809,HTML_MESSAGE=0.001,NO_REAL_NAME=0.285 Subject: LF: Audio Amp IC's on 136kHz. Content-Type: text/html; charset=windows-1252 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.1 required=5.0 tests=HTML_30_40,HTML_MESSAGE, NO_REAL_NAME autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 1 Content-transfer-encoding: 8bit
It's been a few years since I looked at Audio Amp IC's on the LF bands, but I'm now trying to find one that works to some degree at 136kHz.
 
I need to find an audio IC capable of about 15 Watts as a minimum.
It's for use with a standalone PIC based PSK transmitter that uses the G3PLX Varicode, I just thought that a good IC would minimise the component count.
 
Regards
 
David   G0MRF
 From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 99817 invoked from network); 30 May 2004 07:48:41 -0000 Received: from unknown (HELO ptb-mxscan01.plus.net) (212.159.14.235) by ptb-mailstore03.plus.net with SMTP; 30 May 2004 07:48:41 -0000 Received: (qmail 22359 invoked from network); 30 May 2004 07:48:41 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore01.plus.net (212.159.14.215) by ptb-mxscan01.plus.net with SMTP; 30 May 2004 07:48:40 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1BUL3g-0005Zu-Am for dave@picks.force9.co.uk; Sun, 30 May 2004 07:48:40 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BUL2I-00038g-Oe for rs_out_1@blacksheep.org; Sun, 30 May 2004 08:47:14 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BUL2I-00038X-89 for rsgb_lf_group@blacksheep.org; Sun, 30 May 2004 08:47:14 +0100 Received: from postbode01.zonnet.nl ([62.58.50.88]) by relay.salmark.net with esmtp (Exim 4.24) id 1BURao-0004H9-Ms for rsgb_lf_group@blacksheep.org; Sun, 30 May 2004 15:47:18 +0100 Received: (qmail 15006 invoked by uid 10); 30 May 2004 07:47:02 -0000 Received: (vexira-qq 14996-C95784D7 invoked from network) 30 May 2004 09:47:01 +0200 X-Fake-Domain: unknown Received: from unknown (HELO ibm) ([62.59.190.154]) (envelope-sender ) by postbode01.zonnet.nl (qmail-ldap-1.03) with SMTP for < >; 30 May 2004 07:47:01 -0000 X-Bad-Message-ID: no DNS (ibm) Message-ID: <003001c44618$da3ce5c0$2102000a@ibm> From: "Dick" To: rsgb_lf_group@blacksheep.org Date: Sun, 30 May 2004 09:26:57 +0200 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2615.200 X-MIMEOLE: Produced By Microsoft MimeOLE V5.00.2615.200 X-AntiVirus: checked by Vexira MailArmor (version: 2.0.1.16; VAE: 6.25.0.60; VDF: 6.25.0.80; host: postbode01.zonnet.nl) X-Spam-Score: 1.0 (+) X-Spam-Report: autolearn=no,FROM_ENDS_IN_NUMS=0.869,RCVD_IN_SORBS=0.1 Subject: LF: G0MRF-TX SWR protection circuit Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.9 required=5.0 tests=FROM_ENDS_IN_NUMS autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hello all, With the transmitter working well now, I need to check the protection systems. Current protection works good and turned out to be very fast. I have some troubles in adjusting the SWR protection circuit. With no load after the filter, so when antenna is not connected for example, the drain-current is very low, and so the output. Anyway, I found it difficult to adjust the SWR-circuit as the variable resistors seems to effect each other. I wonder if anyone has tips about this. Long duration high power tests will be done later.... Running two IRFP260N FET's, which much must be capable of handling 11A current easy....... Although not recommended I will try and see what happens with 550W input...... In worst case I have to replace them...... 73 Dick, pa4vhf From rsgb_lf_group@blacksheep.org Sun Jan 01 00:00:00 1970 Return-Path: Received: (qmail 65008 invoked from network); 30 May 2004 10:48:23 -0000 Received: from unknown (HELO ptb-mxscan02.plus.net) (212.159.14.236) by ptb-mailstore04.plus.net with SMTP; 30 May 2004 10:48:23 -0000 Received: (qmail 56780 invoked from network); 30 May 2004 10:48:23 -0000 X-Filtered-by: Plusnet (hmail v1.01) X-Spam-detection-level: 11 Received: from ptb-mxcore02.plus.net (212.159.14.216) by ptb-mxscan02.plus.net with SMTP; 30 May 2004 10:48:22 -0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore02.plus.net with esmtp (Exim) id 1BUNra-000Ee8-37 for dave@picks.force9.co.uk; Sun, 30 May 2004 10:48:22 +0000 X-Fake-Domain: majordom Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1BUNqT-0006lC-LP for rs_out_1@blacksheep.org; Sun, 30 May 2004 11:47:13 +0100 Received: from [213.232.95.59] (helo=relay.salmark.net) by post.thorcom.com with esmtp (Exim 4.14) id 1BUNqS-0006l3-UX for rsgb_lf_group@blacksheep.org; Sun, 30 May 2004 11:47:13 +0100 Received: from mailfe06.swip.net ([212.247.154.161]) by relay.salmark.net with esmtp (Exim 4.24) id 1BUUOz-0004ou-DX for rsgb_lf_group@blacksheep.org; Sun, 30 May 2004 18:47:17 +0100 X-T2-Posting-ID: 3bgU4LVfFOB/SKpu7D1OzA== Received: from [212.151.12.171] (HELO oemcomputer) by mailfe06.swip.net (CommuniGate Pro SMTP 4.2b4a) with SMTP id 49702365 for rsgb_lf_group@blacksheep.org; Sun, 30 May 2004 12:47:07 +0200 X-Bad-Message-ID: no DNS (oemcomputer) Message-ID: <006e01c44633$7add0cc0$ab0c97d4@oemcomputer> From: "Johan Bodin" To: rsgb_lf_group@blacksheep.org References: Date: Sun, 30 May 2004 10:46:41 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Spam-Score: 0.1 (/) X-Spam-Report: autolearn=no,RCVD_IN_SORBS=0.1 Subject: LF: Re: Audio Amp IC's on 136kHz. Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SPAMFiltered: yes X-Spam-Rating: 2 Hi David, A switching amplifier with modulated supply should also be able to do the trick. At 15 watts, a single transistor class E amplifier comes to my mind. For example, the modulation can be made by an op-amp and a darlington transistor. If efficiency is an issue, PWM modulation is more elegant but away goes the simplicity... Clint Turner KA7OEI has some nice information on a PIC based PSK-31 beacon TX that uses a class E PA with a linear modulator: http://www.ussc.com/~turner/ 73 Johan SM6LKM > It's been a few years since I looked at Audio Amp IC's on the LF bands, but > I'm now trying to find one that works to some degree at 136kHz. > I need to find an audio IC capable of about 15 Watts as a minimum. > It's for use with a standalone PIC based PSK transmitter that uses the G3PLX > Varicode, I just thought that a good IC would minimise the component count. > Regards > David G0MRF