Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-0.7 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,SUBJ_ALL_CAPS autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: EATSERVER: mailn 1166; Body=2 Fuz1=2 Fuz2=2 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by lipkowski.org (8.14.4/8.14.4/Debian-8+deb8u1) with ESMTP id v32AlMVE011425 for ; Sun, 2 Apr 2017 12:47:24 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1cucyw-0006TB-Jn for rs_out_1@blacksheep.org; Sun, 02 Apr 2017 11:43:38 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1cucyv-0006T2-Tx for rsgb_lf_group@blacksheep.org; Sun, 02 Apr 2017 11:43:37 +0100 Received: from mout02.posteo.de ([185.67.36.66]) by relay1.thorcom.net with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.89) (envelope-from ) id 1cucys-0000BI-Kv for rsgb_lf_group@blacksheep.org; Sun, 02 Apr 2017 11:43:36 +0100 Received: from submission (posteo.de [89.146.220.130]) by mout02.posteo.de (Postfix) with ESMTPS id CA4DA20BFD for ; Sun, 2 Apr 2017 12:43:32 +0200 (CEST) Received: from customer (localhost [127.0.0.1]) by submission (posteo.de) with ESMTPSA id 3vwsKJ2CWfzyqG; Sun, 2 Apr 2017 12:43:32 +0200 (CEST) Message-ID: <58E0D5D3.2040506@posteo.de> Date: Sun, 02 Apr 2017 12:43:31 +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: <15b2d921fc8.marcocadeddu@tin.it> In-Reply-To: <15b2d921fc8.marcocadeddu@tin.it> X-Scan-Signature: 1f795a2ee1ecd56682b47ad11969b3d3 Subject: VLF: SID... Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit 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 2.75 Status: O X-Status: X-Keywords: X-UID: 11088 Hi VLF, There was a SID, well visible on various VLF grabbers. While propation above 15 kHz was greatly improved, it looks like the noise levels below 9 kHz rather dropped. I wonder what signal a phase changes could be been observed on my signal? One day i will be on air while this happens so we can get a bit more understanding of what happens below 9 kHz. Another interesting thing is that the QRM arround 9 kHz in the wideband spectrogram at RC4HAA (http://www.136.su/grabber/) dropped as well. So it could be that it is not local QRM (e.g. from a power supply in the neighbourhood) but rather a strong signal on MF/HF that still passes the low pass filter. That means the situation can be improved by a better filtering... Should be tried :-) 73, Stefan