Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg04.r1000.mx.aol.com (Internet Inbound) with ESMTP id 7AAEF38000088; Wed, 2 Nov 2011 21:21:23 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1RLlyN-0007jj-3X for rs_out_1@blacksheep.org; Thu, 03 Nov 2011 01:20:03 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1RLlyM-0007ja-K2 for rsgb_lf_group@blacksheep.org; Thu, 03 Nov 2011 01:20:02 +0000 Received: from out1.ip06ir2.opaltelecom.net ([62.24.128.242]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1RLlyK-0005Nc-5t for rsgb_lf_group@blacksheep.org; Thu, 03 Nov 2011 01:20:02 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AqkAADTrsU5Ok8ui/2dsb2JhbABEgk2TMAODe498gQaBbQUBAQUIAQEDSQITBRQBAQMFAgEDEQQBAQolFAEEGgYWCAYTCgECAgEBh3O1T4kQBIJYhH6WeYcq X-IronPort-AV: E=Sophos;i="4.69,446,1315177200"; d="scan'208,217";a="517570703" Received: from host-78-147-203-162.as13285.net (HELO xphd97xgq27nyf) ([78.147.203.162]) by out1.ip06ir2.opaltelecom.net with SMTP; 03 Nov 2011 01:19:53 +0000 Message-ID: <002301cc99c6$aed71f90$0401a8c0@xphd97xgq27nyf> From: "mal hamilton" To: References: ,,, <052BA55206094BF087148BC8E0C97027@JimPC> <1320275789.81298.YahooMailNeo@web28104.mail.ukl.yahoo.com> Date: Thu, 3 Nov 2011 01:19:49 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 X-Spam-Score: 1.5 (+) X-Spam-Report: autolearn=disabled,AMATEUR_PORN=1.473,HTML_MESSAGE=0.001 Subject: Re: LF: Re: 8kHz of spectrum Content-Type: multipart/alternative; boundary="----=_NextPart_000_0020_01CC99C6.AE5FCCB0" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: *** X-Spam-Status: No, hits=3.3 required=5.0 tests=AMATEUR_PORN,HTML_20_30, 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: 0:2:480212576:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d60cc4eb1ec92435d X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none This is a multi-part message in MIME format. ------=_NextPart_000_0020_01CC99C6.AE5FCCB0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Pete We all manage on 160 metres where the same criteria applies. You just = need selectivity and expertise. Some operators get nervous when Watts are mentioned and prefer uWatts. You must be having a hard time with the Mega Watt commercial stations = adjacent to the amateur bands, how do you cope ? mal/g3kev ----- Original Message -----=20 From: M0FMT=20 To: rsgb_lf_group@blacksheep.org=20 Sent: Wednesday, November 02, 2011 11:16 PM Subject: Re: LF: Re: 8kHz of spectrum Hi all In my humble opinion high power only goes with wide band width because = ground wave on these medium frequencies travels. So I welcome the lower = power suggestion (assuming anybody sticks to it) with the narrow band = width proposal. And don't jump on me about front end selectivity = because I think it is insurmountable even by "Real" Amateurs. 73 es GL Pete M0FMT IO91UX47VN From: James Moritz To: rsgb_lf_group@blacksheep.org Sent: Wednesday, 2 November 2011, 22:58 Subject: LF: Re: 8kHz of spectrum Dear LF Group, Well, I think this is a positive development - the only minor = disappointment is the reduction in maximum ERP to about 3W. As for the choice of frequency, the maritime people have a plan for a = sort of "super Navtex" using OFDM modulation with a bandwidth of 10kHz = centred on 500kHz. It may be that this is just a pipe dream, and/or a = way to justify continued primary user status at 500kHz. But if it ever = does come into existence, it will certainly be using vastly higher = powers than amateur stations, and the noise sidebands will extend well = beyond the actual signal bandwidth due to "spectral re-growth" in the TX = PA. So it will be good to have a significant difference in frequency = between ourselves and the noisy things. I expect all those REAL amateurs = will manage to reduce their TX frequency by 5 percent somehow ;-) Cheers, Jim Moritz 73 de M0BMU=20 ------=_NextPart_000_0020_01CC99C6.AE5FCCB0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Pete
We all manage on 160 metres where the same = criteria=20 applies. You just need selectivity and expertise.
Some operators get nervous when Watts are = mentioned and=20 prefer uWatts.
You must be having a hard time with the Mega = Watt=20 commercial stations adjacent to the amateur bands, how do you cope=20 ?
mal/g3kev
 
----- Original Message -----
From:=20 M0FMT
Sent: Wednesday, November 02, = 2011 11:16=20 PM
Subject: Re: LF: Re: 8kHz of=20 spectrum

Hi all

In my humble opinion high = power only=20 goes with wide band width because ground wave on these medium = frequencies=20 travels. So I welcome the lower power suggestion (assuming anybody = sticks to=20 it) with the narrow band width proposal. And don't jump on me about = front end=20 selectivity  because I think it is insurmountable even by "Real"=20 Amateurs.

73 es GL Pete M0FMT=20 IO91UX47VN

From: James Moritz=20 <james.moritz@btopenworld.com>
To:=20 rsgb_lf_group@blacksheep.org
Sent: Wednesday, 2 November 2011,=20 22:58
Subject: LF: Re: 8kHz of spectrum

Dear LF = Group,

Well,=20 I think this is a positive development - the only minor disappointment = is the=20 reduction in maximum ERP to about 3W.

As for the choice of = frequency,=20 the maritime people have a plan for a sort of  "super Navtex" = using OFDM=20 modulation with a bandwidth of 10kHz centred on 500kHz. It may be that = this is=20 just a pipe dream, and/or a way to justify continued primary user = status at=20 500kHz. But if it ever does come into existence, it will certainly be = using=20 vastly higher powers than amateur stations, and the noise sidebands = will=20 extend well beyond the actual signal bandwidth due to "spectral = re-growth" in=20 the TX PA. So it will be good to have a significant difference in = frequency=20 between ourselves and the noisy things. I expect all those REAL = amateurs will=20 manage to reduce their TX frequency by 5 percent somehow ;-)
Cheers, Jim Moritz
73 de M0BMU=20
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