Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.3 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS 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 v3H08vAs028408 for ; Mon, 17 Apr 2017 02:08:58 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1czuA9-0005hb-1z for rs_out_1@blacksheep.org; Mon, 17 Apr 2017 01:05:01 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1czuA7-0005hQ-E7 for rsgb_lf_group@blacksheep.org; Mon, 17 Apr 2017 01:04:59 +0100 Received: from smtpout2.wanadoo.co.uk ([80.12.242.42] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1czuA4-0001Az-1S for rsgb_lf_group@blacksheep.org; Mon, 17 Apr 2017 01:04:58 +0100 Received: from AGB ([95.150.163.91]) by mwinf5d20 with ME id 9C4t1v00G1ydolK03C4t5L; Mon, 17 Apr 2017 02:04:54 +0200 X-ME-Helo: AGB X-ME-Date: Mon, 17 Apr 2017 02:04:54 +0200 X-ME-IP: 95.150.163.91 Message-ID: <3F440F45350A4547B9307A9AE6B2E510@AGB> From: "Graham" To: References: , , <8090650B3A4946EC89C3F42310DDE805@AGB> <58F38CD0.13782.DE511@roelof.ndb.demon.nl> In-Reply-To: Date: Mon, 17 Apr 2017 01:04:53 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 14.0.8117.416 X-MimeOLE: Produced By Microsoft MimeOLE V14.0.8117.416 X-Antivirus: Avast (VPS 170416-0, 16/04/2017), Outbound message X-Antivirus-Status: Clean X-Scan-Signature: 6be9408bcc63ba5aab6f1e66e2d5b7ce Subject: Re: LF: 2017-04-16 03:15:13 VO1NA AA PA0RDT JO11TM 0 477 -25Op8_||||||||||||||_~25dB Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response 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: 11348 Happy Easter too , Joe Thought there was a delay , ) Well tonight , your being spotted by LA3EQ , first off at 22:45 , just about at the limit of the op8 range , may be 1 dB short , but after that , every tx ? , definite positive trend in the s/n , conditions seem to change quite quickly , just spotted by pa0rdt at 00:00 @ -30 dB , no dynamic spots before this .. Now 'we can see how narrow the window is , for TA on 502 , luck to make the CW contacts with gb4fpr !! 73-Graham G0NBD 00:00 477 VO1NA de PA0RDT Op8 -30 dB F:12% in Middelburg 1482,4 Hz 00:00 477 VO1NA de LA3EQ Op8 -30 dB F:8% in Egersund 1479.0 Hz 23:45 477 VO1NA de LA3EQ Op8 -29 dB F:2% in Egersund 1479.0 Hz 23:30 477 VO1NA de LA3EQ Op8 -32 dB F:5% in Egersund 1479.0 Hz 23:15 477 VO1NA de LA3EQ Op8 Deep Search -35 dB in Egersund 1479.0 Hz 22:45 477 VO1NA de LA3EQ Op8 Deep Search -38 dB in Egersund 1479.0 Hz -------------------------------------------------- From: Sent: Sunday, April 16, 2017 10:55 PM To: Subject: Re: LF: 2017-04-16 03:15:13 VO1NA AA PA0RDT JO11TM 0 477 -25Op8_||||||||||||||_~25dB > Hi Roelof, G.. and Group, > > The delayed curtain up on the opera was due to VLF tinkering. > There was much excitement when a pc with a properly working > sound card was deployed. Today I resurrected the low 100m aerial > (Happy Easter to all) and fed 30 watts 200ma on 8277 and > got some lovely -60 dB readings at 1 km. Then the coil arced. > A far field detection was almost a certainty up to this point! > > OP8 on 479.477 kHz will resume at 2200 tonight. Good luck > to all and keep up the good work with the RTL Roelof and > thanks for the reports Graham. > > 73 > Joe > > On Sun, 16 Apr 2017, Roelof Bakker wrote: > >> Hello Graham, >> >> Thanks again for the reception overview. >> >> Lack of reception at the start might have been due to severe static. >> See the attached Linrad overnight plot of VO1NA. >> >> I have changed the front end filtering for the RTL SDR V3. It now >> consists of a double tuned band pass filter with a -3 dB bandwidth >> of about 12 kHz (loss 6 dB), followed by a tuneable pre-amplifier >> with a gain of 20 dB. >> >> I have measured the sensitivity of the RTL SDR V3 dongle. At 477 kHz >> the MDS is -121 dBm in a 500 Hz bandwidth. At 100 kHz the MDS is -93 >> dBm. >> >> 73, >> Roelof >> > --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus