Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 98D0338000099; Sun, 20 Nov 2011 15:31:43 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RSE2b-0005e8-1t for rs_out_1@blacksheep.org; Sun, 20 Nov 2011 20:31:05 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RSE2a-0005dw-J3 for rsgb_lf_group@blacksheep.org; Sun, 20 Nov 2011 20:31:04 +0000 Received: from relay.uni-heidelberg.de ([129.206.100.212]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RSE2Z-0002qt-HT for rsgb_lf_group@blacksheep.org; Sun, 20 Nov 2011 20:31:04 +0000 Received: from freitag.iup.uni-heidelberg.de (freitag.iup.uni-heidelberg.de [129.206.29.204]) by relay.uni-heidelberg.de (8.14.1/8.14.1) with ESMTP id pAKKV20q012460 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 20 Nov 2011 21:31:02 +0100 Received: from [129.206.22.206] (pc206.iup.uni-heidelberg.de [129.206.22.206]) by freitag.iup.uni-heidelberg.de (8.12.11.20060308/8.11.2) with ESMTP id pAKKV0EG027743 for ; Sun, 20 Nov 2011 21:31:00 +0100 Message-ID: <4EC96335.7010102@iup.uni-heidelberg.de> Date: Sun, 20 Nov 2011 21:29:41 +0100 From: =?ISO-8859-1?Q?Stefan_Sch=E4fer?= 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: <4EC92D9F.21482.1C03267@mike.dennison.ntlworld.com> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: TF3HZ Content-Type: multipart/alternative; boundary="------------060307040207050101090807" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.8 required=5.0 tests=HTML_30_40,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 x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:463619232:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d408e4ec963af45b6 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. --------------060307040207050101090807 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by relay.uni-heidelberg.de id pAKKV20q012460 Markus, Mike, The effect disappears when local QRM comes up, like visible on his=20 wideband window on the bottom of the page. So i assume it has to do with=20 the noiseblanker and filter settings. Possibly the NB acts on DCF39 and=20 HGA which may be in the passband of the SL internal filter. Halldor has=20 a wideband RX since a few days and showed me the link:=20 http://icas.to/lineup/idc-136-kit-eng.htm Maybe i am increasing the average signal level when i am on air and so=20 the NB is blanking rather seldom? 73, Stefan Am 20.11.2011 19:06, schrieb Markus Vester: > Mike, > interesting. The propagation is probably by daytime D-layer=20 > reflection, which typically exhibits a flat maximum at noon time. This=20 > is conspicuouis eg. on the DCF / HGA plots from 4X and YO, and on Eu=20 > Loran-C signals as well. On the sea path between G and TF, this may be=20 > augmented by a groundwave component with relatively little attenuation. > BTW Stefan's strong DFCW signal is producing an unusual modulation=20 > effect on Halld=F3r's grabber, as both the background noise and all=20 > other signals seem to brighten up during the dashes. Just like a kind=20 > of negative AGC... > Best 73, > Markus (DF6NM) > > *From:* Mike Dennison > *Sent:* Sunday, November 20, 2011 5:41 PM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: TF3HZ > > I was amazed to be received well on TF3HZ's grabber over a daylight > path from 1500 UTC today. > > Mike, G3XDV > =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D > --------------060307040207050101090807 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Markus, Mike,

The effect disappears when local QRM comes up, like visible on his wideband window on the bottom of the page. So i assume it has to do with the noiseblanker and filter settings. Possibly the NB acts on DCF39 and HGA which may be in the passband of the SL internal filter. Halldor has a wideband RX since a few days and showed me the link: http://icas.to/lineup/idc-136-kit-eng.htm
Maybe i am increasing the average signal level when i am on air and so the NB is blanking rather seldom?

73, Stefan

Am 20.11.2011 19:06, schrieb Markus Vester:
Mike,
 
interesting. The propagation is probably by daytime D-layer reflection, which typically exhibits a flat maximum at noon time. This is conspicuouis eg. on the DCF / HGA plots from 4X and YO, and on Eu Loran-C signals as well. On the sea path between G and TF, this may be augmented by a groundwave component with relatively little attenuation.
 
BTW Stefan's strong DFCW signal is producing an unusual modulation effect on Halldór's grabber, as both the background noise and all other signals seem to brighten up during the dashes. Just like a kind of negative AGC...
 
Best 73,
Markus (DF6NM)

 
Sent: Sunday, November 20, 2011 5:41 PM
Subject: LF: TF3HZ

I was amazed to be received well on TF3HZ's grabber over a daylight
path from 1500 UTC today.

Mike, G3XDV
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