Return-Path: Received: from mtain-di09.r1000.mx.aol.com (mtain-di09.r1000.mx.aol.com [172.29.64.13]) by air-dd05.mail.aol.com (v129.4) with ESMTP id MAILINDD052-86334d5307e4153; Wed, 09 Feb 2011 16:32:20 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di09.r1000.mx.aol.com (Internet Inbound) with ESMTP id 29E62380000AB; Wed, 9 Feb 2011 16:32:18 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PnHdJ-0001yn-LA for rs_out_1@blacksheep.org; Wed, 09 Feb 2011 21:31:29 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PnHdI-0001ye-Vs for rsgb_lf_group@blacksheep.org; Wed, 09 Feb 2011 21:31:28 +0000 Received: from defout.telus.net ([204.209.205.13]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PnHdF-0002nd-LL for rsgb_lf_group@blacksheep.org; Wed, 09 Feb 2011 21:31:28 +0000 Received: from edmwcm04 ([204.209.205.55]) by priv-edmwes50.telusplanet.net (InterMail vM.8.01.03.00 201-2260-125-20100507) with ESMTP id <20110209213122.HSHP6023.priv-edmwes50.telusplanet.net@edmwcm04> for ; Wed, 9 Feb 2011 14:31:22 -0700 Received: from [192.168.1.74] ([75.157.148.65]) by edmwcm04 with bizsmtp id 5xXM1g01c1QtnPv01xXMGx; Wed, 09 Feb 2011 14:31:22 -0700 X-Authority-Analysis: v=1.1 cv=6M83WxN1hHtCJ7SEghrjxFESzNFB/m2TL383PQ8hhms= c=1 sm=2 a=nN7BH9HXAAAA:8 a=F3M5lZpKAAAA:8 a=tlHe8eRLc800DKCN7IUA:9 a=tJ6cFDBr_PyNZqP0-goA:7 a=9BDQ7OJq1sDNr6wXEwOtuDZYkH0A:4 a=wPNLvfGTeEIA:10 a=muIvw5a9-cgA:10 a=wk6s2zzMB60A:10 a=LwzYQtO3QioCcwE2Dz4A:9 a=28wCt2zU7Llc-KreY6wA:7 a=_5p6dSBHhWatRGnNLaVaLD3xVl4A:4 Message-ID: <4D5307A9.7080607@telus.net> Date: Wed, 09 Feb 2011 13:31:21 -0800 From: Scott Tilley User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.13) Gecko/20101207 Lightning/1.0b2 Thunderbird/3.1.7 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <252130CB355C48E4BC32BA23475FEF68@White> <009D6A7C37254A8EA7D8EB38B0D418E7@White> <004001cbc885$1e791b50$0401a8c0@xphd97xgq27nyf> 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: Grabber sensitivity Content-Type: multipart/alternative; boundary="------------070009030009030904060605" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: * X-Spam-Status: No, hits=1.7 required=5.0 tests=FROM_ENDS_IN_NUMS,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-sid: 3039ac1d400d4d5307e235e1 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none X-Mailer: Unknown (No Version) --------------070009030009030904060605 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Bravo Markus! On 2/9/2011 1:20 PM, Markus Vester wrote: > Mal, > if you had asked me why you can't see things on my own grabber, I > could have told you about a dozen known plagues. Some from the > vicinity (like the battery charger in one neighbour's garage at > 136.9), some more distant (like the tremendous Luxembourg cacophony > around DCF), and some are intentional (like the 10 minute outages when > the RX is switched to the NavSpaSur moon echo). > But you asked about the noise floor at the DK7FC grabber. Well if I > believed I could point out any specific deficit there, I would simply > tell Stefan about it, and (knowing him), I'm sure he would have it > fixed by the very same evening ;-) > Seriously, I would not even try to come up with a general answer. > There are many possible causes why some signals show up in some places > better than in others. Your receive site may be more RF quiet, or your > high antenna more immune to local mains-borne QRM, or your next-door > neighbour may just not have a certain brand of DSL router. G3KEV may > perhaps benefit from a more northerly location, closer to the shore, > or further from Mediteranean QRN activity. There's a lot of spatial > and temporal variability in propagation. In the end, it also depends > on how much of your lifetime you are willing (and allowed) to spend > sitting before of a transceiver. > Best wishes > Markus (DF6NM) > *From:* mal hamilton > *Sent:* Wednesday, February 09, 2011 7:13 PM > *To:* rsgb_lf_group@blacksheep.org > *Subject:* LF: Re: Re: OE5ODL over different paths > > Markus > How do you explain the reason that I can work ES6AM and EW6GB at good > OOO copy yet these stations are not visible on the DK7FC grabber. I > have my theory but prefer to hear what you have to say > This also applies to other stns like RN3AGC which are good copy with > me but agn not visible on other grabbers like DK7FC > This has been my most recent observations when I have been in QSO with > these stations. > De Mal/g3kev --------------070009030009030904060605 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Bravo Markus!

On 2/9/2011 1:20 PM, Markus Vester wrote:
Mal,
 
if you had asked me why you can't see things on my own grabber, I could have told you about a dozen known plagues. Some from the vicinity (like the battery charger in one neighbour's garage at 136.9), some more distant (like the tremendous Luxembourg cacophony around DCF), and some are intentional (like the 10 minute outages when the RX is switched to the NavSpaSur moon echo).
 
But you asked about the noise floor at the DK7FC grabber. Well if I believed I could point out any specific deficit there, I would simply tell Stefan about it, and (knowing him), I'm sure he would have it fixed by the very same evening ;-)
 
Seriously, I would not even try to come up with a general answer. There are many possible causes why some signals show up in some places better than in others. Your receive site may be more RF quiet, or your high antenna more immune to local mains-borne QRM, or your next-door neighbour may just not have a certain brand of DSL router. G3KEV may perhaps benefit from a more northerly location, closer to the shore, or further from Mediteranean QRN activity. There's a lot of spatial and temporal variability in propagation. In the end, it also depends on how much of your lifetime you are willing (and allowed) to spend sitting before of a transceiver.
 
Best wishes
Markus (DF6NM)
 
 
Sent: Wednesday, February 09, 2011 7:13 PM
Subject: LF: Re: Re: OE5ODL over different paths

Markus
How do you explain the reason that I can work ES6AM and EW6GB at good OOO copy yet these stations are not visible on the DK7FC grabber. I have my theory but prefer to hear what you have to say
This also applies to other stns like RN3AGC which are good copy with me but agn not visible on other grabbers like DK7FC
This has been my most recent observations when I have been in QSO with these stations.
 
De Mal/g3kev
 

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