Return-Path: X-Spam-DCC: paranoid 1356; 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 u3E9lFjG018815 for ; Thu, 14 Apr 2016 11:47:15 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1aqdns-0005B0-NY for rs_out_1@blacksheep.org; Thu, 14 Apr 2016 10:43:12 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1aqdns-0005Ar-BJ for rsgb_lf_group@blacksheep.org; Thu, 14 Apr 2016 10:43:12 +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 1aqdnq-0001xL-Bl for rsgb_lf_group@blacksheep.org; Thu, 14 Apr 2016 10:43:11 +0100 Received: from dovecot03.posteo.de (dovecot03.posteo.de [172.16.0.13]) by mout01.posteo.de (Postfix) with ESMTPS id C998B20A44 for ; Thu, 14 Apr 2016 11:43:09 +0200 (CEST) Received: from mail.posteo.de (localhost [127.0.0.1]) by dovecot03.posteo.de (Postfix) with ESMTPSA id 3qlwhY5G51z5vNM for ; Thu, 14 Apr 2016 11:43:09 +0200 (CEST) Message-ID: <570F662D.5040200@posteo.de> Date: Thu, 14 Apr 2016 11:43:09 +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: <52a3b35439094bae828ad12595663202@kabelmail.de> In-Reply-To: <52a3b35439094bae828ad12595663202@kabelmail.de> X-Scan-Signature: ba91b3da87b600e195a477da13512b8e Subject: Re: VLF: 8269.990Hz Content-Type: multipart/alternative; boundary="------------090803090208090005060907" 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: 7707 This is a multi-part message in MIME format. --------------090803090208090005060907 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Uwe, The QRN was very low this morning! Have you been on air? It would be good to observe the QRN situation just like the WX situation before starting a transmission because both decides if a decode is possible :-) 73, Stefan Am 12.04.2016 17:50, schrieb uwe-jannsen@kabelmail.de: > thanks, Stefan. > > the carrier is on the air. > the message: > > start 2016-04-13 07:00:00 > coding 8K19A > CRC 16 > period 30 > length 5 > duration 04:16:00:00 > > Have fun agn > Uwe/dj8wx > > > > *Von:* DK7FC > *Gesendet:* 11.04.2016 23:42 > *An:* > *Betreff:* Re: VLF: 8269.990Hz > 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 >> --------------090803090208090005060907 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Uwe,

The QRN was very low this morning! Have you been on air? It would be good to observe the QRN situation just like the WX situation before starting a transmission because both decides if a decode is possible :-)

73, Stefan

Am 12.04.2016 17:50, schrieb uwe-jannsen@kabelmail.de:
thanks, Stefan.

the carrier is on the air.
the message:

start 2016-04-13 07:00:00
coding 8K19A
CRC 16
period 30
length 5
duration 04:16:00:00

Have fun agn
Uwe/dj8wx



 
Von: DK7FC <selberdenken@posteo.de>
Gesendet: 11.04.2016 23:42
An: <rsgb_lf_group@blacksheep.org>
Betreff: Re: VLF: 8269.990Hz
 
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
--------------090803090208090005060907--