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=HEADER_FROM_DIFFERENT_DOMAINS, HTML_MESSAGE,RCVD_IN_DNSWL_MED,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; Body=3 Fuz1=3 Fuz2=3 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 v0KFLGSD029103 for ; Fri, 20 Jan 2017 16:21:17 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cUawa-0003hN-4J for rs_out_1@blacksheep.org; Fri, 20 Jan 2017 15:17:36 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cUawZ-0003hE-L5 for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2017 15:17:35 +0000 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1cUawX-0007ud-2P for rsgb_lf_group@blacksheep.org; Fri, 20 Jan 2017 15:17:34 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 0ABAA20ABF for ; Fri, 20 Jan 2017 16:17:31 +0100 (CET) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3v4kpg57WYzyp6 for ; Fri, 20 Jan 2017 16:17:31 +0100 (CET) Message-ID: <58822A0B.9080204@posteo.de> Date: Fri, 20 Jan 2017 16:17:31 +0100 From: DK7FC User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.1.8) Gecko/20100227 Thunderbird/3.0.3 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <0166BDF4-A692-4E83-AA17-DE6FC012EC1F@talktalk.net> <877D570598134B12ADC67A8D874C9F32@AGB> <23DE64E288C84B19B7C9212A6CADFBB8@PCPMF> <587E6B7A.6090204@posteo.de> <587E72D1.3080109@posteo.de> <587E9CEB.7010105@posteo.de> <587EAE7E.8070607@posteo.de> <96a864da2bc335c77277487a4a1d9e0e@smtp.hushmail.com> <5881222D.9050002@posteo.de> <58813585.9000200@abelian.org> <58821669.2060604@posteo.de> In-Reply-To: <58821669.2060604@posteo.de> X-Scan-Signature: 7f2e5481aa97b3cbff3d653a1b2ddfbd Subject: Re: LF: VLF/ULF activity weekend 21th/22th Content-Type: multipart/alternative; boundary="------------080409040109070707060405" 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 Status: O X-Status: X-Keywords: X-UID: 10247 This is a multi-part message in MIME format. --------------080409040109070707060405 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ...sorry i just see that my frequency is 2970.000 Hz, not 2970.005 Hz as announced... 73, Stefan Am 20.01.2017 14:53, schrieb DK7FC: > Am 19.01.2017 22:54, schrieb Paul Nicholson: >> >> Looks good Stefan. I'll be looking for your signals. > > Is there already a visible peak? The ERP is 2.8 uW. The carrier is now > running since almost 6 hours. I'm curious! Also it is interesting that > you can find optimised settings relative to 8270 Hz. I don't yet > understand why it should make a difference to duplicate the stream and > get and apply the blanker from and to different filter settings on the > separate channels. Exiting stuff to experiment with. > > BTW, it is always a bit strange to claim to do the first whatever > (records...), but a few years ago the computer technique was not as > developed to handle modes like 16K25A. So can we conclude that it was > _impossible_ to manage a message transfer over several 100 km on the > lower VLF ( < 10 kHz ) with such power levels? > > The PC causes a lot of phase glitches which are corrected immediately > but one can see a noise spectrum at -20 dBc :-/ I just didn't find the > time to prepare a better setup during the last days but i'm already > working on it... > > 73, Stefan --------------080409040109070707060405 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit ...sorry i just see that my frequency is 2970.000 Hz, not 2970.005 Hz as announced...

73, Stefan

Am 20.01.2017 14:53, schrieb DK7FC:
Am 19.01.2017 22:54, schrieb Paul Nicholson:

Looks good Stefan.  I'll be looking for your signals.

Is there already a visible peak? The ERP is 2.8 uW. The carrier is now running since almost 6 hours. I'm curious! Also it is interesting that you can find optimised settings relative to 8270 Hz. I don't yet understand why it should make a difference to duplicate the stream and get and apply the blanker from and to different filter settings on the separate channels. Exiting stuff to experiment with.

BTW, it is always a bit strange to claim to do the first whatever (records...), but a few years ago the computer technique was not as developed to handle modes like 16K25A. So can we conclude that it was impossible to manage a message transfer over several 100 km on the lower VLF ( < 10 kHz ) with such power levels?

The PC causes a lot of phase glitches which are corrected immediately but one can see a noise spectrum at -20 dBc :-/ I just didn't find the time to prepare a better setup during the last days but i'm already working on it...

73, Stefan
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