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=-0.7 required=5.0 tests=BAYES_00,DNS_FROM_AHBL_RHSBL, 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 u3BLgf8Q007584 for ; Mon, 11 Apr 2016 23:42:41 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1apjY0-00056h-1E for rs_out_1@blacksheep.org; Mon, 11 Apr 2016 22:39:04 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1apjXy-00056Y-HB for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 22:39:02 +0100 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.87) (envelope-from ) id 1apjXw-0000D5-Iq for rsgb_lf_group@blacksheep.org; Mon, 11 Apr 2016 22:39:01 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id 41EEA2097F for ; Mon, 11 Apr 2016 23:38:59 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qkNjt6s83z5vN5 for ; Mon, 11 Apr 2016 23:38:58 +0200 (CEST) Message-ID: <570C1972.6070605@posteo.de> Date: Mon, 11 Apr 2016 23:38:58 +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: <1e5ec67882dd4d26926f8877e4f48beb@kabelmail.de> In-Reply-To: <1e5ec67882dd4d26926f8877e4f48beb@kabelmail.de> X-Scan-Signature: 16a6530e4735ccb856cf9bc7c6cb9773 Subject: Re: VLF: 8269.990Hz Content-Type: multipart/alternative; boundary="------------090307000000080201060509" 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: 7666 This is a multi-part message in MIME format. --------------090307000000080201060509 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Uwe, your transmissions are very interesting. I'm looking forward to receive the 5 char message at 30s. We can try 25s symbols later :-) 73, Stefan Am 11.04.2016 19:05, schrieb uwe-jannsen@kabelmail.de: > > Thanks, Paul. > > Congrats to Stefan and Markus. > > The EbNaut Sender is prepared for length 5, retaining period 30. > But: this afternoon the sky suddenly turned from blue to dark grey, so > possibly the TX stays off. > > We will see. > Uwe > > > > *Von:* Markus Vester > *Gesendet:* 11.04.2016 18:26 > *An:* > *Betreff:* Re: VLF: 8269.990Hz > Uwe, > ... me too ;-) I was actually surprised about the successful decode > because the nighttime carrier was well visible in Heidelberg but not > at all in my spectrogram. > Anyway both our decodes were close to the limit, so for the next > step I would suggest to try 5 char but stay with 30 sec symbols. Due > to the FEC and CRC overhead, going from 3 to 5 characters (1.667 x > payload) will increase the total time only by a factor of 1.23 so we > already loose 1.32 dB sensitivity. Shortening the symbols from 30 to > 20 seconds would cost another 1.76 dB. > Thanks for the test! > All the best, > Markus (DF6NM) > -----Ursprüngliche Mitteilung----- > Von: DK7FC > An: rsgb_lf_group > Verschickt: Mo, 11 Apr 2016 2:56 pm > Betreff: Re: VLF: 8269.990Hz > Hello Uwe, > > Thanks for the VLF transmission. No problem to decode the message! See > attachment. > If Markus can decode and no other station wants to try, maybe we can > try 20s symbols and 5 characters, your callsign for example :-) > > As you probably saw, i saw your carrier on 8269.99 Hz in my 6000 > window in the city but not in the forest. Either it is a propagation > phenomenon that i don't understand yet or there is still something > wrong with the drift calibration. I will today go on the tree again to > re-configure the GPS-module and see if this makes a difference... > > 73, Stefan > > Am 10.04.2016 22:30, schrieb uwe-jannsen@kabelmail.de: > > the carrier is on the air. > the message: > start 2016-04-11 07:00:00 > coding 8K19A > CRC 16 > period 30 > length 3 > duration 03:28:00:00 > Have fun > Uwe/dj8wx > --------------090307000000080201060509 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Uwe, your transmissions are very interesting. I'm looking forward to receive the 5 char message at 30s. We can try 25s symbols later :-)

73, Stefan

Am 11.04.2016 19:05, schrieb uwe-jannsen@kabelmail.de:

Thanks, Paul.

Congrats to Stefan and Markus.

The EbNaut Sender is prepared for length 5, retaining period 30.
But: this afternoon the sky suddenly turned from blue to dark grey, so possibly the TX stays off.

We will see.
Uwe



 
Von: Markus Vester <markusvester@aol.com>
Gesendet: 11.04.2016 18:26
An: <rsgb_lf_group@blacksheep.org>
Betreff: Re: VLF: 8269.990Hz
 
 
Uwe,
 
... me too ;-) I was actually surprised about the successful decode because the nighttime carrier was well visible in Heidelberg but not at all in my spectrogram.
 
Anyway both our decodes were close to the limit, so for the next step I would suggest to try 5 char but stay with 30 sec symbols. Due to the FEC and CRC overhead, going from 3 to 5 characters (1.667 x payload) will increase the total time only by a factor of  1.23 so we already loose 1.32 dB sensitivity. Shortening the symbols from 30 to 20 seconds would cost another 1.76 dB.
 
Thanks for the test!
 
All the best,
Markus (DF6NM)
 
 
-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Mo, 11 Apr 2016 2:56 pm
Betreff: Re: VLF: 8269.990Hz
 
Hello Uwe,

Thanks for the VLF transmission. No problem to decode the message! See attachment.
If Markus can decode and no other station wants to try, maybe we can try 20s symbols and 5 characters, your callsign for example :-)

As you probably saw, i saw your carrier on 8269.99 Hz in my 6000 window in the city but not in the forest. Either it is a propagation phenomenon that i don't understand yet or there is still something wrong with the drift calibration. I will today go on the tree again to re-configure the GPS-module and see if this makes a difference...

73, Stefan

Am 10.04.2016 22:30, schrieb uwe-jannsen@kabelmail.de:
the carrier is on the air.
the message:
start 2016-04-11 07:00:00
coding 8K19A
CRC 16
period 30
length 3
duration 03:28:00:00
Have fun
Uwe/dj8wx
--------------090307000000080201060509--