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 wBJDkn69011210 for ; Wed, 19 Dec 2018 14:46:50 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gZc7P-0006yT-Bd for rs_out_1@blacksheep.org; Wed, 19 Dec 2018 13:42:35 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gZc7N-0006yH-M4 for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 13:42:33 +0000 Received: from out1-22.antispamcloud.com ([185.201.16.22]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gZc7M-0005iH-37 for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 13:42:32 +0000 Received: from [85.60.35.36] (helo=servigilant.vigilant.es) by mx65.antispamcloud.com with esmtpsa (TLSv1:ECDHE-RSA-AES128-SHA:128) (Exim 4.89) (envelope-from ) id 1gZc7B-00038K-3J for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 14:42:27 +0100 Received: from servigilant.vigilant.local ([fe80::c40d:8140:d722:5448]) by servigilant.vigilant.local ([fe80::c40d:8140:d722:5448%13]) with mapi id 14.03.0123.003; Wed, 19 Dec 2018 14:42:10 +0100 From: =?utf-8?B?VklHSUxBTlQgTHVpcyBGZXJuw6FuZGV6?= To: "rsgb_lf_group@blacksheep.org" Thread-Topic: LF: Ebnaut receiver frequency stability qustion Thread-Index: AdSXZZRCEEhZPGx1qkSejQa2QNeh0AABgiiAAAedOAAABT+YsA== Date: Wed, 19 Dec 2018 13:42:09 +0000 Message-ID: <6DB8451D7F3D3947A5918808A59621EA26397DBA@servigilant.vigilant.local> References: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com> <5C19FFCB.1060305@posteo.de> <16876196-3308-f722-dfca-5232150e7394@n1bug.com> In-Reply-To: <16876196-3308-f722-dfca-5232150e7394@n1bug.com> Accept-Language: es-ES, en-US Content-Language: es-ES X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [192.168.0.22] MIME-Version: 1.0 X-Originating-IP: 85.60.35.36 X-MailAssure-Domain: vigilant.es X-MailAssure-Username: smtpsolarwinds Authentication-Results: antispamcloud.com; auth=pass (login) smtp.auth=smtpsolarwinds@vigilant.es X-MailAssure-Outgoing-Class: ham X-MailAssure-Outgoing-Evidence: Combined (0.38) X-Recommended-Action: accept X-Filter-ID: EX5BVjFpneJeBchSMxfU5rQnWWYSSwBdjboBb3EOF+h602E9L7XzfQH6nu9C/Fh9KJzpNe6xgvOx q3u0UDjvOw5j2C7YKailx2Uop+U2Gs8m9etQhNgzEtWqBtUXOJSHVTGbEWWnE2yTxqfzAQugcVfm TwVtp4QkXaVZmTNf88xIeZjZv1oz6oWKgngYgisM8DZztKGImYzpwtV2u5AjtnBQSd9z8kxLpW49 gI7LRCD70WuzEeIYESIPDdUJWOBuPxO0jJAHsPdj1H6RNuBO60m5NOzFyb6byQp3KrGHwAAYIFcZ dV9FymB4yh09XRoOG3gNhjWgIn9EMhhACXfJHpfs332vkt6Wl7MpBkXrMhPAfqmtGTQeo8POuZmc DwPakUDJ/iZViSww8yJJBeO40iObofOmVZ8jq2JCzFshGkbfX8TdqEXkwxwMjsp2mNApg3sUhVGe a1GIQIzAQSWhryERbInMiTBIUBbQ/Dy6Ip4lprBQcgaFwLgmRMoOfSzP/a1CaxG1QPOAWVbHDE16 W6bsVyUy+Ne72iVquZJPo3LonV+E7OMXRvgtdyMlnmWicABz5+BLmFiJNGA/0SKKU6qc8bmfxSs+ MeJoPCPdpG4gd4JinZ4yS7sNhwSVAA6T61OVLoP1Q6wnb/hRIZlIfLEaHGHDukmsgviQSXpmsN22 Tb4Tdy0JXF1Ju3PuLCUkNq5V4WAtJZXC2qV+0qJ7bprcUSN3IjJs7vBbomrSYoqWRuRMemlaL77V V7m4kW0OPAlbDjazCbhs7qBpykynMklGXe6NtxCucctsAhNAxppieQn/z8UtFOqwH/iKkWNT4Qw/ si0LtfynHXJe8jzMLqSnt0bc9wObVlKbHN8OtHofiwMSNhsPEiy5Xyanx+eL/lmcqrp+ZgP1Lb5j QzN+1Q6adtB2Oe88dNhukQEZwoi5Rv4UBMc5RaTDZvGKfpBOXyvnBLFBPBorebXvRPde/zEvuGsl KTrRIXcXpFg5ivY= X-Report-Abuse-To: spam@quarantine3.antispamcloud.com X-Spam-Score: 1.9 (+) 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 EbNaut My downconverter is based on NE602 and is crude simple. No filters, no gain stages. A bit deaf and birdie-rich but wanted to test it that way for EbNaut and check if it works. It is based on K0LR arti [...] Content analysis details: (1.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [185.201.16.22 listed in list.dnswl.org] 1.5 RCVD_IN_SORBS_WEB RBL: SORBS: sender is an abusable web server [85.60.35.36 listed in dnsbl.sorbs.net] -0.0 RCVD_IN_MSPIKE_H2 RBL: Average reputation (+2) [185.201.16.22 listed in wl.mailspike.net] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.1 FROM_EXCESS_BASE64 From: base64 encoded unnecessarily X-Scan-Signature: 1c38f63d01970a2bf149f660c9cb2a37 Subject: RE: LF: Ebnaut receiver frequency stability qustion Content-Type: text/plain; charset="utf-8" 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=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 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by klubnl.pl id wBJDkn69011210 Hi EbNaut My downconverter is based on NE602 and is crude simple. No filters, no gain stages. A bit deaf and birdie-rich but wanted to test it that way for EbNaut and check if it works. It is based on K0LR article you can find here https://www.qsl.net/k0lr/SW-RX/sw-rx.htm The LO based in Xtal and 74HC4060 is REPLACED by a series 10K resistor and series 100nF connected to the GPS output So, for the LO, a cheap uBlox GPS will provide both 120 or 125KHz for the LO and 1pps to discipline the soundcard You only need to connect the GPS to USB and use the uCenter software to configure the GPS outputs and save this cnfiguration as default for the GPS No worth to use the same GPS for Tx. It is so chip you sure can afford another one for Tx at 2x the frequency if you are using a D class PA -----Mensaje original----- De: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] En nombre de N1BUG Enviado el: miércoles, 19 de diciembre de 2018 13:01 Para: rsgb_lf_group@blacksheep.org Asunto: Re: LF: Ebnaut receiver frequency stability qustion Hi Stefan, Luis, LF, Yes, yes! Please grab some paper and start drawing those circuit diagrams! ;-) The non-engineers have many questions... If I understand this correctly... with the NEO-M8T then I just need one module... use one time pulse pin for LO and the other one for 1 PPM to discipline the sound card? Else with the NEO-6/7 or M8N I need two. For the older modules U-blox says they use a 48 MHz NCO and that the time pulse output will have less jitter if configured to a frequency which divides evenly into 48 MHz. So I guess 120 kHz... But I couldn't find any information about the oscillator frequency for the M8T. Does anybody know? What kind of mixer? Can filters help? Band pass filter on antenna input to mixer? LPF on LO to mixer? Probably more questions but since I am not an engineer and have never seen a diagram of this, I don't know what else to ask. Can the same LO and mixer be used for a tx up-converter? 73, Paul On 12/19/18 3:22 AM, 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