Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by klubnl.pl (8.14.4/8.14.4/Debian-8+deb8u2) with ESMTP id wBUG4huB032284 for ; Sun, 30 Dec 2018 17:04:50 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gddVR-0003BU-Ra for rs_out_1@blacksheep.org; Sun, 30 Dec 2018 16:00:01 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gddVR-0003BL-33 for rsgb_lf_group@blacksheep.org; Sun, 30 Dec 2018 16:00:01 +0000 Received: from mout01.posteo.de ([185.67.36.65]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1gddVP-00019N-3m for rsgb_lf_group@blacksheep.org; Sun, 30 Dec 2018 15:59:59 +0000 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id C4557160060 for ; Sun, 30 Dec 2018 16:59:55 +0100 (CET) X-DKIM-Result: Domain=posteo.de Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=posteo.de; s=2017; t=1546185596; bh=F3j5dBPTOwxZ6YubhosmBYVYnUPckF5YgjHct6IRRPg=; h=Date:From:To:Subject:From; b=DT56kdZgRR3bKU9hvpds3dP4ut73cgYUVEs1rSkTXaFAkl6OeQvGsSedAo11cXEXU lp9hkgrsmYRvKexuTA5hYP2cPdWdLeL7rXlUX6vF7sU/9LtIPFOCwtMOcd0Pw/3REP FLdJZoDLOsYsV0xVMPQbJQyTKy/HM3J/xKfDzgmKDD5+QYEpJyjvG8dr/z4V9sB2HY yk0DnIwo70DCWDuTyCpyvwOcKKRf9lPlsX8+GdWPgONZFEe03wSei/fMyc2qGgb7F5 RrAatdPkPTK8ymCRnxKHVEVVtND7ke9dVx3x/vfBhV2aGUPzW8XBwD5katuJD5jspx cTHX8fsCvgBjg== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 43SQBM1h9Dz6tmD for ; Sun, 30 Dec 2018 16:59:55 +0100 (CET) Message-ID: <5C28EB7A.2000707@posteo.de> Date: Sun, 30 Dec 2018 16:59:54 +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: <1397027471.10755880.1546172663822.ref@mail.yahoo.com> <1397027471.10755880.1546172663822@mail.yahoo.com> In-Reply-To: <1397027471.10755880.1546172663822@mail.yahoo.com> X-Spam-Score: -2.3 (--) X-Spam-Report: Spam detection software, running on the system "relay1.thorcom.net", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Hello Markus, ULF, The carrier was stopped after 2 hours (13:17 UTC). What a great result! Again i did not expect such a S/N in 424 uHz at DL0AO. The QRB is 283 km, http://k7fry.com/grid/?qth=KO02MD&from=JN39WI With tha [...] Content analysis details: (-2.3 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [185.67.36.65 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 HTML_MESSAGE BODY: HTML included in message 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: d5ac66e7920295f519efeb68ecc59e6f Subject: Re: ULF: Carrier on 2970.01 Hz Content-Type: multipart/alternative; boundary="------------060209060707030602080309" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,HTML_MESSAGE autolearn=no version=2.63 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 This is a multi-part message in MIME format. --------------060209060707030602080309 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Hello Markus, ULF, The carrier was stopped after 2 hours (13:17 UTC). What a great result! Again i did not expect such a S/N in 424 uHz at DL0AO. The QRB is 283 km, http://k7fry.com/grid/?qth=KO02MD&from=JN39WI With that SNR and dureation, we could have transferred a 50 character EbNaut message on that frequency! It is the new lowest frequency for DL0AO (amateur signal detection), so congrats to that! That SNR indicates that even lower frequencies could be detected at DL0AO. Maybe it is worth to try 970 Hz again? So far the best distance on frequencies below 2.97 kHz is the 57.6 km path between here and my tree. At 1/3 of the frequency, do we expect about 10 dB less SNR? What about the local noise situation? 10 dB in 424 uHz, that would be fine. If i would be even more crazy, i would buy another 120 Ah accu and build a stronger DC/DC converter and then run 1 kW from there. Everything is possible! But there is another idea that i will follow, which can improve the antenna efficiency a lot... So, thanks to the crew for operating the RX site at DL0AO and the grabber service and these very good results in the end of the year! 73, Stefan Am 30.12.2018 13:24, schrieb Markus Vester: > Wow, a 20 dB peak on the DL0AO grabber !!! > > https://vlf.u01.de/ > https://vlf.u01.de/VLFgrabber/vlf5.jpg > > Congratulations to Stefan and the DL0AO crew! > > Best 73, > Markus > > -----Ursprüngliche Mitteilung----- > Von: DK7FC > An: rsgb_lf_group > Verschickt: So, 30. Dez 2018 12:40 > Betreff: ULF: Carrier on 2970.01 Hz > > Hi ULF, > > The accu is fully recharged and i am on the hill again, transmitting on > the ground loop antenna. This time, the accu has even more power. The TX > power is 520 W (!), the DC measurement tells i need just 64 V for 1 A, > and now, at 2970.01 Hz i am getting a record antenna current of 2.75 A!! > The carrier ison the air since 11:17 UTC and i intend to run it for 2 > hours again, like yesterday. > > Reports are welcome :-) > > > 73, Stefan > --------------060209060707030602080309 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Hello Markus, ULF,

The carrier was stopped after 2 hours (13:17 UTC).
What a great result! Again i did not expect such a S/N in 424 uHz at DL0AO. The QRB is 283 km, http://k7fry.com/grid/?qth=KO02MD&from=JN39WI
With that SNR and dureation, we could have transferred a 50 character EbNaut message on that frequency!
It is the new lowest frequency for DL0AO (amateur signal detection), so congrats to that!
That SNR indicates that even lower frequencies could be detected at DL0AO. Maybe it is worth to try 970 Hz again? So far the best distance on frequencies below 2.97 kHz is the 57.6 km path between here and my tree. At 1/3 of the frequency, do we expect about 10 dB less SNR? What about the local noise situation? 10 dB in 424 uHz, that would be fine.
If i would be even more crazy, i would buy another 120 Ah accu and build a stronger DC/DC converter and then run 1 kW from there. Everything is possible! But there is another idea that i will follow, which can improve the antenna efficiency a lot...

So, thanks to the crew for operating the RX site at DL0AO and the grabber service and these very good results in the end of the year!

73, Stefan




Am 30.12.2018 13:24, schrieb Markus Vester:
Wow, a 20 dB peak on the DL0AO grabber !!!

https://vlf.u01.de/
https://vlf.u01.de/VLFgrabber/vlf5.jpg

Congratulations to Stefan and the DL0AO crew!

Best 73,
Markus

-----Ursprüngliche Mitteilung-----
Von: DK7FC <selberdenken@posteo.de>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: So, 30. Dez 2018 12:40
Betreff: ULF: Carrier on 2970.01 Hz

Hi ULF,

The accu is fully recharged and i am on the hill again, transmitting on
the ground loop antenna. This time, the accu has even more power. The TX
power is 520 W (!), the DC measurement tells i need just 64 V for 1 A,
and now, at 2970.01 Hz i am getting a record antenna current of 2.75 A!!
The carrier ison the air since 11:17 UTC and i intend to run it for 2
hours again, like yesterday.

Reports are welcome :-)


73, Stefan

--------------060209060707030602080309--