Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, RCVD_IN_DNSWL_MED,SPF_PASS,STOX_REPLY_TYPE autolearn=ham autolearn_force=no version=3.4.0 X-Spam-DCC: : mailn 1480; 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 v3FDkEZB023680 for ; Sat, 15 Apr 2017 15:46:15 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1czNzB-0006aN-If for rs_out_1@blacksheep.org; Sat, 15 Apr 2017 14:43:33 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1czNzB-0006aE-7T for rsgb_lf_group@blacksheep.org; Sat, 15 Apr 2017 14:43:33 +0100 Received: from smtpout5.wanadoo.co.uk ([80.12.242.80] helo=smtpout.wanadoo.co.uk) by relay1.thorcom.net with esmtp (Exim 4.89) (envelope-from ) id 1czNz8-0005iB-B6 for rsgb_lf_group@blacksheep.org; Sat, 15 Apr 2017 14:43:32 +0100 Received: from AGB ([95.150.163.2]) by mwinf5d68 with ME id 8djV1v00L03Qyhb03djV3r; Sat, 15 Apr 2017 15:43:30 +0200 X-ME-Helo: AGB X-ME-Date: Sat, 15 Apr 2017 15:43:30 +0200 X-ME-IP: 95.150.163.2 Message-ID: <0417B6886F264A6AB9875FE906EA2CBE@AGB> From: "Graham" To: References: <58F21E6B.3096.F2699@roelof.ndb.demon.nl> In-Reply-To: <58F21E6B.3096.F2699@roelof.ndb.demon.nl> Date: Sat, 15 Apr 2017 14:43:29 +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 170415-0, 15/04/2017), Outbound message X-Antivirus-Status: Clean X-Scan-Signature: c0336009bd9bab526ca27d297ea7579a Subject: Re: LF: 2017-04-15 06:00:30 VO1NA AA PA0RDT JO11TM 0 477 -17 Op8_||||||||||||||||||||||||||||||_~17dB Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original 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: 11319 Roelof , The system is based on 2.4 KHz b/w , Good set of results , over a 7 hour window , Building on the op32 act, If Joe could run op32 , at 500 hz HF to centre on the 2khz setting , and start much earlier and stop later , the extra db sensitivity , would give a much wider window and possibly enhanced range .. Glad the system ran ran well for you, 73-Graham NB don't use a narrow filter to feed audio to Opera , that will degrade the low s/n performance ! 2.4k ssb usb or lsb , or cw 2.4 bfo -/+ 1500 hz -------------------------------------------------- From: "Roelof Bakker" Sent: Saturday, April 15, 2017 2:21 PM To: Subject: Re: LF: 2017-04-15 06:00:30 VO1NA AA PA0RDT JO11TM 0 477 -17 Op8_||||||||||||||||||||||||||||||_~17dB > Hello Graham, > > Thank you for the accumulated results of last night's 477 VO1NA OP8 > reception. Results are promising as propagation was rather mediocre. > > I find it amazing how well the cheap RTL-SDR V3 dongle worked. > > Is the signal to noise figure referenced to a bandwidth of 2500 Hz? > If so, using a 12 Hz filter for aural copy, yields an improvement of > about 23 dB. > > 73, > Roelof, pa0rdt > > --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus