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 w84LsRF1030656 for ; Tue, 4 Sep 2018 23:54:29 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1fxJ0Z-0008VJ-K1 for rs_out_1@blacksheep.org; Tue, 04 Sep 2018 22:37:11 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1fxIxC-0008OG-BG for rsgb_lf_group@blacksheep.org; Tue, 04 Sep 2018 22:33:42 +0100 Received: from forward1j.cmail.yandex.net ([5.255.227.19]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91_59-0488984) (envelope-from ) id 1fxIxA-0000ty-28 for rsgb_lf_group@blacksheep.org; Tue, 04 Sep 2018 22:33:40 +0100 Received: from mxback2o.mail.yandex.net (mxback2o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::1c]) by forward1j.cmail.yandex.net (Yandex) with ESMTP id 1FC8F20C88 for ; Wed, 5 Sep 2018 00:33:32 +0300 (MSK) Received: from localhost (localhost [::1]) by mxback2o.mail.yandex.net (nwsmtp/Yandex) with ESMTP id X4CyJz2t3R-XUPaVGSf; Wed, 05 Sep 2018 00:33:31 +0300 X-DKIM-Result: Domain=yandex.ru Result=Signature OK DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex.ru; s=mail; t=1536096811; bh=0PVzLMTibEWOJg03HKwt6yLR+32eV1H/gcPHsGGTWpI=; h=From:To:In-Reply-To:References:Subject:Date:Message-Id; b=pFKaDs4b7CMAfT90a4fAzE+bktVFU+s/OinmnMLa8InJMMJ/IIoporVHTq5UMpSIN w0uULF9jNYwOkFwPb2uS54NBtQPKXeHJQEeKNwkQq1ED96P+8pmw/cO8KDOf0gRt/P uN58DH3kxA9r1s+NfPyxK6ljQg5hiI/tdF7l+ZJE= Authentication-Results: mxback2o.mail.yandex.net; dkim=pass header.i=@yandex.ru Received: by iva4-6d7004ac8463.qloud-c.yandex.net with HTTP; Wed, 05 Sep 2018 00:33:30 +0300 From: Roman To: rsgb_lf_group@blacksheep.org In-Reply-To: <5B8E2F89.6070502@posteo.de> References: <16595df30ae-1ebc-71c3@webjasstg-vaa24.srv.aolmail.net> <6dad9712-7675-dd5d-899b-964b7a25ab38@abelian.org> <99b31835-7364-79b4-d56f-b6f76e25fad8@abelian.org> <5B8AE987.2090205@posteo.de> <5B8D2615.9090307@posteo.de> <25871536000346@iva5-e9a4c5420a84.qloud-c.yandex.net> <5B8D87FA.3020603@posteo.de> <258741536010648@sas1-0a6c2e2b59d7.qloud-c.yandex.net> <5B8E23A6.8020501@posteo.de> <5B8E2F89.6070502@posteo.de> Subject: Re: ULF: Carrier on 2970.005 Hz MIME-Version: 1.0 X-Mailer: Yamail [ http://yandex.ru ] 5.0 Date: Wed, 05 Sep 2018 00:33:30 +0300 Message-Id: <6606341536096810@iva4-6d7004ac8463.qloud-c.yandex.net> Content-Transfer-Encoding: 7bit Content-Type: text/plain X-Spam-Score: -0.7 (/) 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: TNX for info, Genosse Stefan! -) Why you use battaries for TX, not a compact motor-generator? > Roman, ULF, > > Some more thoughts. This distance is in the far field for frequencies > down to 870 Hz. In my view, it is out of the range of 'local tests'. > Think about the GHz guys operating above 100 GHz. They deal with the > same distances and spend the same efforts and money :-) > It and it is my goal to go down as deep as possible. It is a pleasure to > work with this type of antenna and i can already see that it outperforms > my large inv-L below 3 kHz. The ease of use is fascinating. You don't > need a coil to resonate it and you don't need to hande high voltages > (although i like high voltages :-) ). > For this antenna, the limiting factor is the TX power and time! I need > to transmit from batteries and stay there during the transmission, so i > can't run a carrier for weeks. But i could apply 2 kW! :-) So far i > managed to apply 255 W (RF) and the goal is to reach 500 W. > In a next step i need to improve the RX site since the small loop > becomes quite deaf below 2 kHz it seems. > > 73, Stefan > > Am 04.09.2018 08:18, schrieb DK7FC: > >> Hello Roman, >> >> The distance between RX and TX is 55.6 km in all these experiments, >> also on 2970/2470/1970 Hz. The report for 1570 Hz (the 191 km band) >> will follow today. >> Unfortunately this loop has its minimum pointing to Russia and the ERP >> is very low so it is most unlikely to receive a signal from this antenna. >> But the ongoing transmissions on 17.4701 kHz could be received >> relatively easily in 3000 km distance. >> >> 73, GD DX, >> Stefan >> >> Am 03.09.2018 23:37, schrieb Roman: >> >>> GA Genosse Funkamateur Stefan! >>> >>> Vielen dank! >>> MNY TNX for info! >>> >>> Tell me pse, whats QRB on your DFCW-90 experiment and on 2970|1970 Hz? >>> >>> Best DX in your experiments! >>> All russian LF looking to your experiments! -) >>> >>> 73! >>> Roman -- 73! Roman, RW3ADB [...] Content analysis details: (-0.7 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [5.255.227.19 listed in list.dnswl.org] 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (rw3adb[at]yandex.ru) -0.0 SPF_PASS SPF: sender matches SPF record 0.0 T_DKIM_INVALID DKIM-Signature header exists but is not valid X-Scan-Signature: c9d6a1e47761f7ec7375ac340bef30d0 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 TNX for info, Genosse Stefan! -) Why you use battaries for TX, not a compact motor-generator? > Roman, ULF, > > Some more thoughts. This distance is in the far field for frequencies > down to 870 Hz. In my view, it is out of the range of 'local tests'. > Think about the GHz guys operating above 100 GHz. They deal with the > same distances and spend the same efforts and money :-) > It and it is my goal to go down as deep as possible. It is a pleasure to > work with this type of antenna and i can already see that it outperforms > my large inv-L below 3 kHz. The ease of use is fascinating. You don't > need a coil to resonate it and you don't need to hande high voltages > (although i like high voltages :-) ). > For this antenna, the limiting factor is the TX power and time! I need > to transmit from batteries and stay there during the transmission, so i > can't run a carrier for weeks. But i could apply 2 kW! :-) So far i > managed to apply 255 W (RF) and the goal is to reach 500 W. > In a next step i need to improve the RX site since the small loop > becomes quite deaf below 2 kHz it seems. > > 73, Stefan > > Am 04.09.2018 08:18, schrieb DK7FC: > >> Hello Roman, >> >> The distance between RX and TX is 55.6 km in all these experiments, >> also on 2970/2470/1970 Hz. The report for 1570 Hz (the 191 km band) >> will follow today. >> Unfortunately this loop has its minimum pointing to Russia and the ERP >> is very low so it is most unlikely to receive a signal from this antenna. >> But the ongoing transmissions on 17.4701 kHz could be received >> relatively easily in 3000 km distance. >> >> 73, GD DX, >> Stefan >> >> Am 03.09.2018 23:37, schrieb Roman: >> >>> GA Genosse Funkamateur Stefan! >>> >>> Vielen dank! >>> MNY TNX for info! >>> >>> Tell me pse, whats QRB on your DFCW-90 experiment and on 2970|1970 Hz? >>> >>> Best DX in your experiments! >>> All russian LF looking to your experiments! -) >>> >>> 73! >>> Roman -- 73! Roman, RW3ADB