Return-Path: Received: (qmail 2344 invoked from network); 20 Dec 2002 10:13:03 -0000 Received: from marstons.services.quay.plus.net (212.159.14.223) by mailstore with SMTP; 20 Dec 2002 10:13:03 -0000 Received: (qmail 5904 invoked by uid 10001); 20 Dec 2002 10:12:58 -0000 Received: from post.thorcom.com (193.82.116.70) by marstons.services.quay.plus.net with SMTP; 20 Dec 2002 10:12:58 -0000 X-Priority: 3 X-MSMail-Priority: Normal X-SQ: A Received: from majordom by post.thorcom.com with local (Exim 4.10) id 18PK8X-0002wZ-00 for rsgb_lf_group-outgoing@blacksheep.org; Fri, 20 Dec 2002 10:12:09 +0000 Received: from [193.212.240.200] (helo=virus-out.ttyl.com) by post.thorcom.com with esmtp (Exim 4.10) id 18PK8W-0002wJ-00 for rsgb_lf_group@blacksheep.org; Fri, 20 Dec 2002 10:12:09 +0000 Received: from [134.47.162.190] by virus-in.online.no with ESMTP; Fri, 20 Dec 2002 11:11:34 +0100 Received: from tns-fbu-22-214.corp.telenor.no ([134.47.162.92]) by tns-fbu-22-209.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.4453); Fri, 20 Dec 2002 11:11:32 +0100 Received: from tns-fbu-22-213.corp.telenor.no ([134.47.162.191]) by tns-fbu-22-214.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.4453); Fri, 20 Dec 2002 11:11:32 +0100 Received: from TNS-FBU-2E-003.corp.telenor.no ([134.47.164.201]) by tns-fbu-22-213.corp.telenor.no with Microsoft SMTPSVC(5.0.2195.4453); Fri, 20 Dec 2002 11:11:31 +0100 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 content-class: urn:content-classes:message Date: Fri, 20 Dec 2002 11:11:32 +0100 Message-ID: <2D280BB697C7EE4C979C5C89925418EF36900B@TNS-FBU-2E-003.corp.telenor.no> Thread-Topic: LF GDO Thread-Index: AcKmxt8xtRVdbAf0R3mSuW6lqj/38wBSEzzA From: jan-martin.noding@telenor.com To: rsgb_lf_group@blacksheep.org Cc: g4wgt@talkgas.net X-OriginalArrivalTime: 20 Dec 2002 10:11:31.0815 (UTC) FILETIME=[2B3CE770:01C2A810] MIME-Version: 1.0 Subject: LF: Re: LF W7ZOI type Grid-Dip-Meter will cover most desired frequency bands Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Status: No, hits=1.8 required=5.0tests=NO_REAL_NAME,SPAM_PHRASE_01_02version=2.42 X-Spam-Level: * Sender: Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group it was an article by W7ZOI in QST sometime in the early 80's for a dipper using a signal generator. I tested the principle for 3-100MHz, but it is no reason why it shouldn't work on lower frequency. You probably need only 10 turns with 2cm diameter (or few turns with large diameter) for the coupling loop. LB8X also tested the circuit with MFJ259 and it seems to operate even with simpler arrangement than mine Have made some documents, and have the reference at home, but unfortunately the reflector is subscribed for the work email address, instead of home... 73 Jan-Martin LA8AK@online.no -----Opprinnelig melding----- Fra: G4WGT [mailto:g4wgt@talkgas.net] Sendt: 18. desember 2002 19:51 Til: Rsgb_Lf_Group Emne: LF: LF GDO Hi All at LF, Just been browsing LF web sites & on looking at the Longwave Club of America home page there is a reference to an article as shown below. ************** The LOWDOWN This Month. In the Dec. 2002 issue: "Gate Dip Oscillator for the LowFER and MedFER" Article by George N. McCormick. ************** Has anyone got details of this LF GDO or something similar for use at 136 Khz as it seems to me that an exsisting HF GDO would require extensive modifications to allow it to operate at this low frequency. I have an Eddystone S902 GDO which goes down to 390 Khz but the coil arrangement seems complex in respect of extending the range to 136 Khz. Any ideas are welcome. May I also add my congratulations to those already posted for the JASON T/A reception of Jim's transmission by John. I tried monitoring but did not receive anything intelligable, may be I require more tries to get it right ?? as I am not sure of the best method of setting up the receiver frequency etc for use with JASON. Any advice gents ? Regards Gary G4WGT ---