Return-Path: Received: (qmail 26195 invoked from network); 11 Jul 2001 09:49:47 -0000 Received: from unknown (HELO murphys-inbound.servers.plus.net) (212.159.14.225) by excalibur.plus.net with SMTP; 11 Jul 2001 09:49:47 -0000 Received: (qmail 18665 invoked from network); 11 Jul 2001 09:48:42 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by murphys with SMTP; 11 Jul 2001 09:48:42 -0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from majordom by post.thorcom.com with local (Exim 3.16 #2) id 15KGSS-00028M-00 for rsgb_lf_group-outgoing@blacksheep.org; Wed, 11 Jul 2001 10:39:00 +0100 Received: from [212.204.115.10] (helo=hugo.fen-net.de ident=root) by post.thorcom.com with esmtp (Exim 3.16 #2) id 15KGSR-00028F-00 for rsgb_lf_group@blacksheep.org; Wed, 11 Jul 2001 10:38:59 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Received: from [212.204.116.109] (dialin-nbg-109.fen-net.de [212.204.116.109]) by hugo.fen-net.de (8.9.1/8.9.1) with SMTP id LAA29246 for ; Wed, 11 Jul 2001 11:37:42 +0200 (MET DST) Message-ID: <200107110937.LAA29246@hugo.fen-net.de> From: "Walter Staubach" To: rsgb_lf_group@blacksheep.org Subject: LF: Duplex 1 to 1.1million Date: Wed, 11 Jul 2001 11:38:13 +0100 X-Mailer: EPOC32 Email Version 1.50 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: On june17th the stations DL2NDO and DJ2LF had a duplex QSO in cw, one way on 8953Hz, the other on 10.368200MHz. Frequency ratio 1:1 158 067. On 8953Hz DJ2LF transmitted 12W from an AF amplifier with 2 tubes EL12/375 via loading coil 0.4H and 136KHz antenna. DL2NDO's receiver from 0 to 30MHz was homemade with a tuned front end for 8953Hz. Antenna 15m wire 10m up. He transmitted on 10GHz with 0.2W and antenna 50cm diameter. The receiver at DJ2LF site was an old wide band FM transceiver with gunnplexer and 100MHz IF. To this IF a 1000Hz ozillator was connected which always started when a strong carrier was received. So the cw signals were copied clearly despite the gunnplexer. The 8953Hz link worked immediately, but not the 10GHz. The reason was: DL2NDO put the 10GHz equipment behind the closed window. But the the window plane was coated to avoid thermic losses. After opening the window the signal was loud and clear. Distance about 1Km. 73 Walter DJ2LF