Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wBJC4W4u010673 for ; Wed, 19 Dec 2018 13:04:34 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gZaVB-00066K-M9 for rs_out_1@blacksheep.org; Wed, 19 Dec 2018 11:59:01 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gZaVB-00066B-DI for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 11:59:01 +0000 Received: from proofpoint-cluster.metrocast.net ([65.175.128.136]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gZaV9-0005Q8-RJ for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 11:59:00 +0000 Received: from [192.168.2.7] (d-69-161-84-15.cpe.metrocast.net [69.161.84.15]) (authenticated bits=0) by huckleberry.metrocast.net (8.14.7/8.14.4) with ESMTP id wBJBwuPU045892 for ; Wed, 19 Dec 2018 11:58:57 GMT From: Rob Renoud Mime-Version: 1.0 (1.0) Date: Wed, 19 Dec 2018 06:58:56 -0500 Message-Id: <0E0AEF52-CE89-4E56-A2E1-77C2F9815B4B@md.metrocast.net> References: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com> <5C19FFCB.1060305@posteo.de> In-Reply-To: <5C19FFCB.1060305@posteo.de> To: rsgb_lf_group@blacksheep.org X-Mailer: iPad Mail (16B92) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.22.28,1.0.8,0.0.0000 definitions=2018-12-19_06:2018-12-17,2018-12-19,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=1 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1810110000 definitions=main-1812190104 X-Spam-Score: -0.7 (/) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hi Stefan, Luis, LF EbNaut, There are several who believe the converter circuit approach is a viable path to EbNaut RX capability. I think three things are needed at this point: 1) Circuits 2) Identification of suitable Local Oscillator hardware (possibly for both RX and TX) 3) Clear and concise software configuration and operation instructions for Spectrum Lab, EbNaut-tx, Eb [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [65.175.128.136 listed in list.dnswl.org] X-Scan-Signature: 4b5b5ebe37a4c4f430f59bc35c1947b0 Content-Type: text/plain; charset=utf-8 Subject: Re: LF: Ebnaut receiver frequency stability qustion X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: 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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by klubnl.pl id wBJC4W4u010673 Hi Stefan, Luis, LF EbNaut, There are several who believe the converter circuit approach is a viable path to EbNaut RX capability. I think three things are needed at this point: 1) Circuits 2) Identification of suitable Local Oscillator hardware (possibly for both RX and TX) 3) Clear and concise software configuration and operation instructions for Spectrum Lab, EbNaut-tx, EbNaut-rx, etc. Toward that end, I will set up a converter circuit and begin tests using K3SIW’s LowFER EbNaut beacon on 185.185... kHz with the goal of producing EbNaut configuration and operation instructions for the converter approach. Additional thoughts and suggestions are welcome. 73, Rob - K3RWR > On Dec 19, 2018, at 03:22, DK7FC wrote: > > Hi Luis, LF, > > I agree, this is indeed the most reasonable design. Using the same here ;-) but a 125 kHz LO, locked to GPS. > Maybe we should provide easy converter crcuits. A compromise between high end and easy to build up, for the 'EbNaut-newcomers'? > > 73, Stefan > > Am 19.12.2018 07:39, schrieb VIGILANT Luis Fernández: >> >> Hi EbNaut >> >> I think that using expensive receivers is NOT the way to go. I'm using a simple mixer as downconverter. The LO is 120KHz generated from a uBlox GPS. So the 137KHz outputs as 17KHz and can be feeded to PC soundcard. The second channel of GPS provides 1pps to discipline the soundcard using Spectrum lab >> >> Not using filters at all and no amplifier stages. So there is room for improvement, but it works >> >> 73 de Luis >> EA5DOM