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 w9RBeUUt002942 for ; Sat, 27 Oct 2018 13:40:37 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1gGMpD-0003XS-QK for rs_out_1@blacksheep.org; Sat, 27 Oct 2018 12:32:15 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1gGMlu-0003X4-8l for rsgb_lf_group@blacksheep.org; Sat, 27 Oct 2018 12:28:50 +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 4.91_59-0488984) (envelope-from ) id 1gGMlp-0003yf-PS for rsgb_lf_group@blacksheep.org; Sat, 27 Oct 2018 12:28:46 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout01.posteo.de (Postfix) with ESMTPS id 78EC320424 for ; Sat, 27 Oct 2018 13:28:43 +0200 (CEST) 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=1540639723; bh=/cEH1ft1wL9hp8CN2nacR+q+QW9KMRLXfkynd662pZU=; h=Date:From:To:Subject:From; b=UBapAVRNA8CQDatuuicUZpLoHbe1CAhcILlUtSauDb+wBnmi2E/NGxuR1QPl+I7WM +0QAv53JS5XWWAVUhiR3rbKRZtb+AEiNiIMjJEIGv7ARPw2vUY+NxyUORMDUKXtSZp /rYnGHmZs8BbVZrUK2jO96vnNSQhNWr90DFKIPuurbfNO1IGIXjHtkMkM+8jghweE0 SgzcUhBQvhjmTQYHkiZbbPe3OfuCwnTfcANcPSRtb26r0lAbBSkyyipoGxT41x/tOq 4Y0jo7KIXZIv8RxQB08P/9LKhVeZbCMuVj6xgo99wWpJO1KsvLw3dB8Zv0Smv4cY5u od3GoZIRVg6bw== Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 42hzBy45tRz6tmG; Sat, 27 Oct 2018 13:28:42 +0200 (CEST) Message-ID: <5BD44BEA.2070409@posteo.de> Date: Sat, 27 Oct 2018 13:28:42 +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, Renato Romero Subject: ULF: EbNaut message attempt at 829.9 Hz References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------080602080501080302010908" 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: Dear ULF friends, Since 11 UTC, i'm attempting to transfer an EbNaut message into the far field at 829.9 Hz. The antenna current is 1.83 A, blown into my 900m spaced earth electrode antenna. TX power is 320 W. At the given distance between my TX and RX antennas, 57.6 km, this is the lowest frequency in the far field. I'm trying: [...] 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 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -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: 4f449c45f7b1894a9195a328eedaeb30 X-SA-Exim-Scanned: No; SA Timed out after 180 secs 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. --------------080602080501080302010908 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Dear ULF friends, Since 11 UTC, i'm attempting to transfer an EbNaut message into the far field at 829.9 Hz. The antenna current is 1.83 A, blown into my 900m spaced earth electrode antenna. TX power is 320 W. At the given distance between my TX and RX antennas, 57.6 km, this is the lowest frequency in the far field. I'm trying: *f = 829.9 Hz Start time: 27.OCT.2018 11:00 UTC Symbol period: 10 s Characters: 4 CRC bits: 18 Coding 16K21A Antenna current: 1.8 A Duration: 02:45:20 [hh:mm:ss] * If the noise background is as low as in the recent 5 character message at 970 Hz, i will have a spare of 3 dB for a decode, so i am quite optimistic. If successful, it will be a new record for the lowest frequency for a message generated/received in the far field, by amateurs. Quite cold here! The notebook is standing on the roof of my old car while writing this email. Now i have to wait and enjoy the nature here :-) 73, Stefan PS: Since a few days i'm archiving/monitoring the E field ELF...VLF stream of Renato Romero, IK1QFK. It is unlikely but i will see if he got the message at a significant SNR... --------------080602080501080302010908 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: 8bit Dear ULF friends,

Since 11 UTC, i'm attempting to transfer an EbNaut message into the far field at 829.9 Hz. The antenna current is 1.83 A, blown into my 900m spaced earth electrode antenna. TX power is 320 W.
At the given distance between my TX and RX antennas, 57.6 km, this is the lowest frequency in the far field.
I'm trying:

f = 829.9 Hz
Start time: 27.OCT.2018  11:00 UTC
Symbol period: 10 s
Characters: 4
CRC bits: 18
Coding 16K21A
Antenna current: 1.8 A
Duration: 02:45:20 [hh:mm:ss]

If the noise background is as low as in the recent 5 character message at 970 Hz, i will have a spare of 3 dB for a decode, so i am quite optimistic.

If successful, it will be a new record for the lowest frequency for a message generated/received in the far field, by amateurs.

Quite cold here! The notebook is standing on the roof of my old car while writing this email.
Now i have to wait and enjoy the nature here :-)

73, Stefan


PS: Since a few days i'm archiving/monitoring the E field ELF...VLF stream of Renato Romero, IK1QFK. It is unlikely but i will see if he got the message at a significant SNR...
--------------080602080501080302010908--