Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, HTML_50_60,HTML_MESSAGE,RATWARE_GECKO_BUILD,SPF_PASS autolearn=no version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id u97Boi44004565 for ; Fri, 7 Oct 2016 13:50:44 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1bsTYN-0007iE-8T for rs_out_1@blacksheep.org; Fri, 07 Oct 2016 12:43:03 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1bsTYM-0007i5-Fr for rsgb_lf_group@blacksheep.org; Fri, 07 Oct 2016 12:43:02 +0100 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 1bsTYK-0008Dd-Ju for rsgb_lf_group@blacksheep.org; Fri, 07 Oct 2016 12:43:01 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id 40B1920992 for ; Fri, 7 Oct 2016 13:42:56 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3sr71W6Ds0z105p for ; Fri, 7 Oct 2016 13:42:55 +0200 (CEST) Message-ID: <57F78A3F.5030803@posteo.de> Date: Fri, 07 Oct 2016 13:42:55 +0200 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: <154c32c4dba-373a-24653@webprd-m58.mail.aol.com> <573CAF79.9040701@abelian.org> <573CBBF0.4030701@posteo.de> <573E5907.6020107@posteo.de> <573EA094.3040205@abelian.org> <573EF90F.1080201@posteo.de> <573FC4DA.3080107@abelian.org> <5740842D.3030000@posteo.de> <5744FA27.6010703@posteo.de> <57F56531.3060205@posteo.de> In-Reply-To: <57F56531.3060205@posteo.de> X-Scan-Signature: 9be3f060697a097db7a337109fbeece1 Subject: Re: VLF: EbNaut transmissions on lower frequencies?, pre-tests: 6.47kHz Content-Type: multipart/alternative; boundary="------------090700040304040902090804" 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 2.56 on 10.1.3.11 Status: O X-Status: X-Keywords: X-UID: 8960 This is a multi-part message in MIME format. --------------090700040304040902090804 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit ...transmission completed. Suddenly there was a lot of noise again which makes a decode more unlikely :-( There average antenna current was 270 mA. Any results, Paul? 73, Stefan Am 05.10.2016 22:40, schrieb DK7FC: > Hi Paul, VLF, > > Time to continue and complete that experiment: The goal is 20 > characters on 6.47 kHz. > I just re-built the system, the TX runs 260 mA on 6470 Hz. > > Now, the nexct attempt: > > *f = 6470.00000 Hz > Start time: 05.10.2016 21:00:02 UTC > Symbol length: 140 s > Characters: 15 > CRC 16 > Coding 8K19A > Duration: 38h, 34m, 40s* > *Antenna current: 250 mA (ish)* > > 73, Stefan > > > The last and best result so far: >>> Am 21.05.2016 04:15, schrieb Paul Nicholson: >>>> Stefan wrote: >>>> >>>> > f = 6470.00000 Hz >>>> > Start time: 20.05.2016 00:30:02 UTC >>>> > Symbol length: 100 s >>>> > Characters: 10 >>>> > CRC 16 >>>> > Coding 8K19A >>>> >>>> Copied 'THAT WORKS' >>>> >>>> Eb/N0 = +2.7 dB, constant reference phase >>>> >>>> Carrier: 19.25 dB in 13.3 uHz >>>> >>>> Error map: http://abelian.org/vlf/tmp/160520a.gif >>>> >>>> -- >>>> Paul Nicholson >>>> -- >>>> --------------090700040304040902090804 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit ...transmission completed. Suddenly there was a lot of noise again which makes a decode more unlikely :-( There average antenna current was 270 mA.

Any results, Paul?

73, Stefan

Am 05.10.2016 22:40, schrieb DK7FC:
Hi Paul, VLF,

Time to continue and complete that experiment: The goal is 20 characters on 6.47 kHz.
I just re-built the system, the TX runs 260 mA on 6470 Hz.

Now, the nexct attempt:

f = 6470.00000 Hz
Start time: 05.10.2016   21:00:02 UTC
Symbol length: 140 s
Characters: 15
CRC 16
Coding 8K19A
Duration: 38h, 34m, 40s
Antenna current: 250 mA (ish)

73, Stefan


The last and best result so far:
Am 21.05.2016 04:15, schrieb Paul Nicholson:
Stefan wrote:

> f = 6470.00000 Hz
> Start time: 20.05.2016   00:30:02 UTC
> Symbol length: 100 s
> Characters: 10
> CRC 16
> Coding 8K19A

Copied 'THAT WORKS'

Eb/N0 = +2.7 dB, constant reference phase

Carrier: 19.25 dB in 13.3 uHz

Error map: http://abelian.org/vlf/tmp/160520a.gif

--
Paul Nicholson
--

--------------090700040304040902090804--