Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_MED,SPF_PASS, T_DKIM_INVALID autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v4Q1ZcG4012165 for ; Fri, 26 May 2017 03:35:40 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dE45u-00006G-Rd for rs_out_1@blacksheep.org; Fri, 26 May 2017 02:31:10 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dE45t-000067-GR for rsgb_lf_group@blacksheep.org; Fri, 26 May 2017 02:31:09 +0100 Received: from resqmta-ch2-01v.sys.comcast.net ([2001:558:fe21:29:69:252:207:33]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1dE45q-00038s-B0 for rsgb_lf_group@blacksheep.org; Fri, 26 May 2017 02:31:08 +0100 Received: from resomta-ch2-01v.sys.comcast.net ([69.252.207.97]) by resqmta-ch2-01v.sys.comcast.net with SMTP id E45cduZuGO3QoE45ldQpJh; Fri, 26 May 2017 01:31:01 +0000 X-DKIM-Result: Domain=comcast.net Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=comcast.net; s=q20161114; t=1495762261; bh=CTOkFGDpQ9Q3JYDoJLkkPF6NEUAQc7QtaHD4JY7MGnc=; h=Received:Received:From:To:Subject:Date:Message-ID:MIME-Version: Content-Type; b=LgB3GOsXfcue1bg3vmT7spMxu3nWfeZX6JUDJnHqUyZWuvD8crK2R/bsZIv6xpAuF ctIHmvXt98Bqu2laLldZ3jq8H/aPYYH2VAOq84eA6NqabLD+yjGqp3n9u+qs2i/y28 WqWdgDvjadcAz7yFOuAcED5QUXqxTuiPCRepwv9ZEk6jgmkVBH894HvxUOylc1xXlO xrhLvCgMqqKbTD/Vsdnk38sIJju2pvKOyvAL7B+DDk0Utp/HF2KqF4nZf7NiVeMJvT R2JEpWIVDr2FHp2moIMAZAK4AU2i+8UtxT/+KjYbFlhO9UfEVSlh/TQFjLgZrnq0TS y9OA+W5sqgBjg== Received: from Owner ([IPv6:2601:140:8500:7f9f:6d13:db64:c206:f451]) by resomta-ch2-01v.sys.comcast.net with SMTP id E45jdXYHfWlw8E45kdkGaa; Fri, 26 May 2017 01:31:01 +0000 From: To: References: <579355A36AEE9D4FA555C45D556003AB8FDD9B58@servigilant.vigilant.local> <675856377.119399.1494880952530@connect.xfinity.com> <10bf8134-0330-03c1-c7be-02b6a0391aa3@abelian.org> <1fb38e09-2adf-bdb8-1e28-5064ef604d2c@abelian.org> <17af4668-083c-ea04-9622-dbb1de768f2b@abelian.org> <59233AC1.7040707@posteo.de> <592342DF.2060405@posteo.de> <592467CA.4000604@posteo.de> <1cda44e5-18bc-b346-315a-f838065d8ea4@abelian.org> <592564F7.4060901@posteo.de> <5926ECE3.9030201@posteo.de> <59273F3E.8000608@posteo.de> In-Reply-To: <59273F3E.8000608@posteo.de> Date: Thu, 25 May 2017 21:30:56 -0400 Message-ID: <026601d2d5bf$b99e6100$2cdb2300$@comcast.net> MIME-Version: 1.0 X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQK4xRBKdUpPgTiF6oUV7l/qL5qVbgLUtu+tApY4gZQBlWTTGwHTe1wDAX6EHJcCvkRPOAKXiu6zAXdsjIYBP02UhAHMo69oAe5TpEECCOGBcQMSNsuDAemYL60Ca19mrgK1kWktAOBvwzsBTJAeugG4yIAKAjcwg2Ke9xGb0A== Content-Language: en-us X-CMAE-Envelope: MS4wfMUBiNe22J9zI9s5FdlLDl2KM3vvmLXYbt3RmLth8reipV8IQBBZ95M+i2i1qdcbgqcnMlJ/RtnUGruMpWbN7FJJZFT3DD8oct6SRZ24QI54KvfAlJUX GjbvBk1fPqpI89cFy4Qhg497vYkkSHT1hb0= X-Scan-Signature: c9d6a1e47761f7ec7375ac340bef30d0 Subject: RE: VLF: EbNaut tonite, 'SMS' via VLF Content-Type: text/plain; charset="UTF-8" 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 X-Scanned-By: MIMEDefang 2.75 Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by lipkowski.org id v4Q1ZcG4012165 Status: RO X-Status: X-Keywords: X-UID: 11771 Wow! Nice work all. Jim AA5BW -----Original Message----- From: owner-rsgb_lf_group@blacksheep.org [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of DK7FC Sent: Thursday, May 25, 2017 4:32 PM To: rsgb_lf_group@blacksheep.org Subject: Re: VLF: EbNaut tonite, 'SMS' via VLF Hi Paul, VLF, That's amazing! A 'SMS' via VLF over ~ 25 wavelengths distance on the 36 km band, from a fixed antenna, in less than a day and without stacking! Again i think back to 2010 :-) Such a result in late May! We used to say that VLF won't work in summer, because of the high QRN levels... I'm impressed! 73, Stefan Am 25.05.2017 21:50, schrieb Paul Nicholson: > > Stefan wrote: > > > Well, let's try something for the record list again: > > > f = 8270.100000 Hz > > Start time: 24.May.2017 20:00:00 UTC > > Symbol period: 10 s > > Characters: 160 ( 1 SMS length :-) ) CRC bits: 10 Coding 8K21A > > Duration: 22h > > Copied > > "THIS IS THE FIRST SMS SENT OVER VLF BY RADIO AMATEURS. > THANKS TO PAUL NICHOLSON, DL4YHF AND DF6NM FOR SOFTWARE > DEVELOPMENTS. JOIN IN THE EXPERIMENTS! 73, DK7FC" > > Rank 0, constant reference phase; > Eb/N0 = +0.6 dB; > BER 27.3%; > carrier S/N: 30.17 dB in 12.6 uHz, > -18.81 dB in 1Hz, > -52.79 dB in 2.5kHz; > > That's a new record message length for VLF. > > -- > Paul Nicholson > -- >