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 v8NCFtfv001353 for ; Sat, 23 Sep 2017 14:15:57 +0200 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1dvjGj-0005EA-Qr for rs_out_1@blacksheep.org; Sat, 23 Sep 2017 13:10:49 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1dvjGj-0005E1-6f for rsgb_lf_group@blacksheep.org; Sat, 23 Sep 2017 13:10:49 +0100 Received: from omr-m020e.mx.aol.com ([204.29.186.20]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.89) (envelope-from ) id 1dvjGf-000266-Rw for rsgb_lf_group@blacksheep.org; Sat, 23 Sep 2017 13:10:47 +0100 Received: from mtaomg-laa01.mx.aol.com (mtaomg-laa01.mx.aol.com [172.27.2.99]) by omr-m020e.mx.aol.com (Outbound Mail Relay) with ESMTP id 26DF038000B3 for ; Sat, 23 Sep 2017 08:10:43 -0400 (EDT) Received: from core-acb02a.mail.aol.com (core-acb02.mail.aol.com [172.27.24.2]) by mtaomg-laa01.mx.aol.com (OMAG/Core Interface) with ESMTP id A9D4038000083 for ; Sat, 23 Sep 2017 08:10:42 -0400 (EDT) Received: from 188.192.44.165 by webjas-vac019.srv.aolmail.net (10.96.19.22) with HTTP (WebMailUI); Sat, 23 Sep 2017 08:10:41 -0400 Date: Sat, 23 Sep 2017 08:10:42 -0400 From: Markus Vester To: rsgb_lf_group@blacksheep.org Message-Id: <15eaea599c9-c0a-56a@webjas-vac019.srv.aolmail.net> In-Reply-To: <59C63EC4.12309.B636CA@roelof.ndb.demon.nl> MIME-Version: 1.0 X-MB-Message-Source: WebUI X-MB-Message-Type: User X-Mailer: JAS STD X-Originating-IP: [188.192.44.165] x-aol-global-disposition: G DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mx.aol.com; s=20150623; t=1506168643; bh=ItgFQ8V09X/pV4GS4ayc8xKZxkVNCyb7OOGqNBMm4QY=; h=From:To:Subject:Message-Id:Date:MIME-Version:Content-Type; b=YVNFaS2eb03sxXBCwGKXJ+XaclLTWEyjHrUxX/7Oyy46ZcjTmiyqwbiduudyLdCf5 jTEDn6+lp3o21Km3TV1wqUbHfV877BqthGM4h2VQHthL7Ayxd4so0AaG21vfCrTxBj OfcM3wnAEbGWEUKcWourhi4VGwNEENxXFcYmRivg= x-aol-sid: 3039ac1b026359c64f42592d X-Spam-Score: 0.0 (/) 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 the administrator of that system for details. Content preview: Hi Roelof, this seems to be too optimistic. WSPR-2 decodes down to -29 dB in 2.5 kHz, equivalent to -5 dB in 10 Hz. Aural CW would probably require around +6 dB in that bandwidth, i.e. 11 dB less sensitive. [...] Content analysis details: (0.0 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (markusvester[at]aol.com) -0.0 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain 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: a6b6ffaf48fdddf1ed5c25dc4bf03ee1 Subject: Re: LF: CW 477.7 kHz Content-Type: multipart/alternative; boundary="----=_Part_1375_1225613522.1506168641993" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=HTML_MESSAGE autolearn=no version=2.63 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 ------=_Part_1375_1225613522.1506168641993 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Roelof, this seems to be too optimistic. WSPR-2 decodes down to -29 dB in 2.5 kHz, = equivalent to -5 dB in 10 Hz. Aural CW would probably require around +6 dB = in that bandwidth, i.e. 11 dB less sensitive. Best 73, Markus -----Urspr=C3=BCngliche Mitteilung-----=20 Von: Roelof Bakker An: rsgb_lf_group Verschickt: Sa, 23. Sept 2017 13:01 Betreff: Re: LF: CW 477.7 kHz ... I believe slow Morse, say 10 WPM, received with a 10 Hz filter will=20 achieve about the same signal to noise ratio as WSPR. In this case=20 this is 24 dB compared to a 2500 Hz SSB bandwidth. .. ------=_Part_1375_1225613522.1506168641993 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Hi Roelof,

this seems to be too optimistic. WSPR-= 2 decodes down to -29 dB in 2.5 kHz, equivalent to -5 dB in 10 Hz= . Aural CW would probably require around +6 dB in that bandwidth,= i.e. 11 dB less sensitive.

Best 73,
Markus


-----Urspr= =C3=BCngliche Mitteilung-----
Von: Roelof Bakker <roelof@ndb.demon.n= l>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschic= kt: Sa, 23. Sept 2017 13:01
Betreff: Re: LF: CW 477.7 kHz
...
I be= lieve slow Morse, say 10 WPM, received with a 10 Hz filter will
achiev= e about the same signal to noise ratio as WSPR. In this case
this is 24= dB compared to a 2500 Hz SSB bandwidth.
..
------=_Part_1375_1225613522.1506168641993--