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 wBJCcAcO010814 for ; Wed, 19 Dec 2018 13:38:18 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gZb2Q-0006RO-QM for rs_out_1@blacksheep.org; Wed, 19 Dec 2018 12:33:22 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gZb2Q-0006RF-F3 for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 12:33:22 +0000 Received: from mout.perfora.net ([74.208.4.197]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gZb2O-0005WS-SY for rsgb_lf_group@blacksheep.org; Wed, 19 Dec 2018 12:33:21 +0000 Received: from [192.168.1.127] ([72.224.159.95]) by mrelay.perfora.net (mreueus003 [74.208.5.2]) with ESMTPA (Nemesis) id 0M6Cey-1hJQCC44KI-00y7I7 for ; Wed, 19 Dec 2018 13:33:19 +0100 To: rsgb_lf_group@blacksheep.org References: <10f465fa-37f0-4ac6-b53d-793f955ea011@email.android.com> <5C19FFCB.1060305@posteo.de> <0E0AEF52-CE89-4E56-A2E1-77C2F9815B4B@md.metrocast.net> From: N1BUG Openpgp: preference=signencrypt Autocrypt: addr=paul@n1bug.com; prefer-encrypt=mutual; keydata= mQINBFqj1+0BEACggWlaH8oG/AiXSUG3CeQwZ1NrVEP4U7YsA9N9XEffjCDEsnTjHF2BJSgS 2AicyomkmTGvghEHxrNFfFw07jwgJl97ae/VtNxpERPSE98mb4sPOMpJbwddioMazMDXwhKA wpg5fse+Ru8OrIT04KK919xL/pZuAP6pY6d2kVoizjJOfS71pHpiU6N6q3d9cl+w7d2LKhAE a3A1ZgDquPvn0WQlrN8K5D66xVrwTRhf1b5H4Ozl8/mMJzCeLG1ZIsDB3Pu2flwE81P8dCJA y1azwgY8pTEshVk4em/se9uRiZaDJr/qUSCf6hrV7AGa8g1jpAQDmdGpDNYMqyDqXen4jNi1 8kNFVu1BMl2vjaI8skw/YPxIxlk/0ROHYhN6SuoDq1mt4AW4FryNa7k3A8dM8Bt7udBoTv0i uw4j9R/bmh2vl/QaHRUhDco0xn2z6geWvXkKqha++vzXDrEKUuqgB85SDZPs5W/phs9p0pz1 xA61d1gn8FQJtpou5dQuAucqMo8eKQY5LUcbC+MH5pebH+M2wIuDCBmFPJHQDSPNepeaxJ4o G/HU1hrpzlgLiTTSKR8DcwtMQwYywnCTlm8MgL4jXuPzoGyKDMYyKIjC51G+3AAOJ6oXJAGR g0ehhCPtmnCGBaRlUIoUSpbgc4B+onqFKZmDiVm9CRNJhKIWrQARAQABtBZOMUJVRyA8cGF1 bEBuMWJ1Zy5jb20+iQI9BBMBCAAnBQJao9ftAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMB Ah4BAheAAAoJECRS/J8srRGjPBsQAIh+Haz9gqrQJ0OlMI5xmQ0A5nsVWcatWF/Ea4mucNjL 4n4jmW+Z4Ukn3OVss55chWwrOVMRNWU2d2zRc92ZF7yJhLCoJFV870bZfxNYwdJ3GEBLIu6/ anmQYX0oXFx8UBsx5K6egNqbeflPA7zrLiQkWrz6JApECdiA1rHDjyJdS7PDxBCG9cKgr/5b r4Rn/JlUl9pRPnxlSwHXsV+J6JtFYtWI69MWIVD7Y7OY1wO9+684uOnzeDANzeIwpBDcSm6p 0D5u0b1hfPl2TD0ozVs6P0NvxkMbimXUhRR1QD0FvydyxmZTLAo+XZDGR8GqWYrYrauoRZ1h 3m23+bNT2T4AuoFnWekpsZu+sxIf0LKPtEZCa51O65jZ810ROpXg9Lx71gEoQD+kbjO69+kq 9r7wjytDq/jyhpOGrGYV6kgcQrISY86t9YvkA9Of2HDzZLih3GwecW6fkeV1AO5w4RteE9nL zIs2siGw2YqavF6LpTH71Db7cUYyZWn5hkKpwfpLNnPEuqgZACovpH1WUHx+KMqqIL4rMVCH GcSLqnH2KF4cEDb6OeTbwuLfpGlN+I3j24eQnB2uz5rDa7/IBjsClLl8S/wdDTP8IikBGixX 06v3k06tk/OF4UsfJ0cY/ASGP5+kjT4ASMZAIikwVMpKi5A5be77vecKNYlJQ2a6uQINBFqj 1+0BEACaujZXo3F17v7QTnub4DjjYvm+nr8J0uU5pPc1UMEz9eWjmtmITm15fx1hPKNtVW+I VlT+DG+ShNnYmO2M4CFBoc7PwkAOc70aDxfHz20kotvj1HhXG7oBiqPkN3TK4C7qWV1HUEPA V960qPdhsoCqmtkvNwj39w1T0ZR5qwwaqDogs9UwBib7zseQ3OXHG32xYYCMcxM35hgXGkkz R7wFL4ZnAPOeFb8LnWtZcrGpwXdsYkXuCxm+A+u9KlFY+w3ZCzZt1F9Ie+/PSZnFIUtbXt2i mfc+VkRwOLz5BDAeWuDL09TN81+gbrR3kXlymDcCbuduO/yHOQK085qzE3LuImdy+JNb7oDf 1C/hvpRvtB02vVy33rzIXT8644SJzFY/mw/W39/BgHKCoL1FrBbfgf0UoIFw5M752i7jQwmv j5yFfnVAXIPpCuusMwWMGVpZcGV7QxJxh0HBEhYgOo9v3zKwzNIPm9V/LA67u/rj4a/MlCE0 mpd6IHaePE1vXDaboPZHZdhAziru5/Jd7KQI0k+HmM/HRANPRNDZ4UeBpgj9PzS6hDN5GHlZ fRUbI8JAg9wSaQtEn0bjyaR7lw0yngZTvvjT1Qqt5zGwm1IAall2STes5xK0aS7p+UJJMVbf ydZ5VOnocvUkwYxbiqoyuVtGxi4tpWW9CRstYXMkAwARAQABiQIlBBgBCAAPBQJao9ftAhsM BQkJZgGAAAoJECRS/J8srRGjTDMP/18q7uhac/naxoFsOqhgXIlvaPgu6GX7s/QOh+bcSV1F y50lxo51P/C95H2TVME/CtCjk2xWQcNjWtXloMEsZpl7T3qWgJHvyZYkDtgh3M6UNY+zb08U K9E2+rR0AZ6zdMKio7Z1xA9BtbUpSZpvy2NgjoYVqo35NllUWMZJq0u+88PvE5WeCIqLipNI EZmUcG9UwolQbPkrRc42ReL+bFbuXGXDA5GbQ0RudXbugI8iUwaw3ftaKElIZtuHW0hw1VrU 9tVHsxKyEoKgNNT1hr+dgRmvCHmA87Pi4R5cMV0ZkLVOYfPX1motedag7HmSNPi2PkYLts4z kyvPEJe2IvaPvjvK1ShRWWgje3uytrhfwyjUZcIuA76RWEfBbwT2Mbrn9O7LvrYtbTiTlsLo Zdk2uocuefBvPd2oI7mTn5eLy/VDy2JVnlb9vpZZhriXI4KtCcP6mYyuPxlxqj/30Kn1fU5b C4EpnKy6hW1CHM42DbwzT+ChjBpFbX9bfwT4qn6d42+T4mN5wkmfnBRHfcn8Wf1ezRSK3Ome Esa3ZDssj23CZHe11uec6Ln14qoB7JyRT9qM3Q99tzvAlmWFM3GrSsG94g4JponQjQWHmr8B eMYezwJHzSI7zWElJpzs/OuohstTYfYTy16FygUOEinc1K4ywjEklgRpXRtjKvqc Message-ID: <32e3ee11-863b-9071-3b01-aea09d1b6bad@n1bug.com> Date: Wed, 19 Dec 2018 07:33:18 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <0E0AEF52-CE89-4E56-A2E1-77C2F9815B4B@md.metrocast.net> Content-Language: en-US X-Provags-ID: V03:K1:A1v0vzVe1YN/MTlR6GWp/fEKemZs1fcIJUiT4SnZUUVL1djMA/L gnwLmuZNcYkj47xs0cJssEX9mpPqQQ10ZkvepdLew/3BvOzBtr6gp5274tNuhPZspB9Zp08 ArRjFfsm4HzqXWOl+IL6DhBTQ1QE6SfG03t0QNla8PMsrcZwxPFMmAAwzb17LJQ9m51Tw3H rnsTQUQSf+PWn2nGgbpPA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:U9i2A12ZKlQ=:AtSHEquupxND8V6c7krs6B Ifs0UItzENBDPebGo2wLmz09Jadb/ahIvLqGxuqWBEGD1YvXV/xS82JZ7HQStxJj4ASg94zpt dubvtgyrfUH8bwfBr9skQrVKwWcg0rbsKXWT2Xh2tXkipWcmv2/Vofue25smtPl2mibGges8W 5CLmU+fK/5aYCPhqkkSc9sQvVRd4JlUuB1Ks48VcHw1hk2q0hpad8OWzMF32SAg2PlS7t1ezf Zrj6MSnB4ePk0RmnuBVCi2j/3x9hTagmMFBCtf77Eaq1xfAvU4bUBfTRbFVRB0szhiFHYGcTh U8O59bvSStmNHeHHqioq0sYBg00cNWx50Ks5OFEhJADMwM6gWAAUOPe1B/ZbFnNO+AOa241v2 IQivgq2rCIiI791iHSA32u4VkzXf+5AvBET+bXD66cBIXoLpHXEgm9aFS1FuRimEFcAJHsdw7 RWZMF0dFyOoHvnow598cROnTkQeOLEj7xAQ0CrGhTqWO4cS22jvZqHhR3q3uRTj1YzrzesDN4 925rLWsp4xNOPAff0j5zl5QW/uZ3CbBExDxuT/y0e5JQwdoAJ2WPsjELkRc4jjI16aiIL5RTn XLaZCrCTAww1jXJH1kx1Y7apged6jIjn88FRQgg+q9oYzGppoEGv7iPq0eqPcaRkV3RP4tQTK BpA4cMNQ9AKtPT+8yeE9zTz9nsUqM0SuAnzTDXSOHycxXb/It7c5gYLFqQotsk26ow7cNNF0p vrsC+u7tDOIrsVDrRXz7fT5IwVqH2W00arUzEyV0wZaBSKqwR/lGvdCnmfs= X-Spam-Score: 0.0 (/) 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: I agree 100%, Rob. To me items 1 and 2 are the most critical up front. A mistake configuring free software is minor compared to a mistake buying the wrong hardware. The latter could mean long delays before another attem [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at http://www.dnswl.org/, no trust [74.208.4.197 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H3 RBL: Good reputation (+3) [74.208.4.197 listed in wl.mailspike.net] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders X-Scan-Signature: 8556389a5ea14fbbf9b9d801ab70c592 Subject: Re: LF: Ebnaut receiver frequency stability qustion Content-Type: text/plain; charset=utf-8 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=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 I agree 100%, Rob. To me items 1 and 2 are the most critical up front. A mistake configuring free software is minor compared to a mistake buying the wrong hardware. The latter could mean long delays before another attempt. Per Jay's comment, I prefer to include filters wherever they would improve performance. Generally, receive filters are cheap and easy... 73, Paul On 12/19/18 6:58 AM, Rob Renoud wrote: > 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