Return-Path: Received: from mtain-dd05.r1000.mx.aol.com (mtain-dd05.r1000.mx.aol.com [172.29.64.145]) by air-mc01.mail.aol.com (v129.4) with ESMTP id MAILINMC013-a8514d6e3f20f5; Wed, 02 Mar 2011 07:59:12 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dd05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4E11538000162; Wed, 2 Mar 2011 07:59:09 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Puld0-0006FT-Iz for rs_out_1@blacksheep.org; Wed, 02 Mar 2011 12:58:06 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Puld0-0006FK-2q for rsgb_lf_group@blacksheep.org; Wed, 02 Mar 2011 12:58:06 +0000 Received: from mail-qw0-f43.google.com ([209.85.216.43]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1Pulcy-0005NW-1F for rsgb_lf_group@blacksheep.org; Wed, 02 Mar 2011 12:58:06 +0000 Received: by qwb7 with SMTP id 7so5627416qwb.16 for ; Wed, 02 Mar 2011 04:57:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:message-id:from:to:date:x-mailer:mime-version :subject:x-priority:references:in-reply-to:content-type; bh=DqPvFQ32GTCUsQdQSeVpNxt6K2NihhDJJ3vLddl4+Wg=; b=iZIia7PzjKkirOKi/Agr1r3FfLNtrm5LjImvAsrTGMgTGZbMY9a8fC2JjDo+zgdaGX p8LFAmQZHYrls9FPUKMNaphgSDnjWH2CPhiD75jpxDYZNk46i/Noc2JYj+vrBTHDbH7h 3WEwum0fUtaH50yUvXkCbVO5YViBH0FkDkLFE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:date:x-mailer:mime-version:subject:x-priority :references:in-reply-to:content-type; b=wMeDwVollMqry5//iMBf6KmH5t17V/JHHkIDWXprsJVaI3twEjUkYH3oV2SBUdCxUz 5lMI1cRIIDEQGisV2BvQdOz617XzWGcFGNi3qHJ+68LsbvrcjZj/N9Nj6/ec2A3nijGT RSM4S+D0oEaIp99AR0aQzlrdmRc2XV8BzEnDQ= Received: by 10.224.28.204 with SMTP id n12mr6875102qac.346.1299070676925; Wed, 02 Mar 2011 04:57:56 -0800 (PST) Received: from mx.google.com (244.sub-174-254-178.myvzw.com [174.254.178.244]) by mx.google.com with ESMTPS id p13sm4908353qcu.17.2011.03.02.04.57.54 (version=SSLv3 cipher=OTHER); Wed, 02 Mar 2011 04:57:56 -0800 (PST) Message-ID: <523d8738-db86-4950-bb5b-1b69289f6cfe@blur> From: "wd2xgj@gmail.com" To: rsgb_lf_group@blacksheep.org Date: Wed, 2 Mar 2011 07:58:09 -0500 X-Mailer: Motorola android mail 1.0 MIME-Version: 1.0 X-Priority: 3 References: In-Reply-To: DomainKey-Status: good (testing) X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001,NO_REAL_NAME=0.55 Subject: Re: LF: WRC-2012 proposal for 'near' 500kHz band(s) Content-Type: multipart/alternative; boundary="Motorola-A-Mail-iBEaPVd0z7ANwEFw" X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=HTML_MESSAGE,NO_REAL_NAME 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-AUTHENTICATION: mail_rly_antispam_dkim-m016.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40914d6e3f1d0709 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --Motorola-A-Mail-iBEaPVd0z7ANwEFw Content-Type: text/plain; Format="Flowed"; DelSp="Yes"; charset="US-ASCII" Content-Transfer-Encoding: 7bit David, A good receiver will have something upwards of 60dB i.f. rejection, consumer models somewhat less. The bottom line is that nobody cares about MW (except hams!) The martime group is lobbying governments to create new digital data services at 500, it remains to be seen if they will get their wish. In the meantime the maritime interests will fight like mad to hold on to the frequencies whether they use them or not! 73 Warren K2ORS Sent via DROID on Verizon Wireless -----Original message----- From: David Pratt To: rsgb_lf_group@blacksheep.org Sent: Wed, Mar 2, 2011 11:20:07 GMT+00:00 Subject: LF: WRC-2012 proposal for 'near' 500kHz band(s) I was somewhat disturbed by the piece in last Sunday's GB2RS news that gave preliminary information about the proposals to WRC-2012 for an allocation near to 500kHz. It states that the initial proposal for 15kHz allocated was between 415 to 526.5kHz. Due to future maritime use, the RSGB is proposing 472-487kHz, while the US will be proposing two bands totally 15kHz, viz 461-469 and 471-478kHz. I wonder whether any thought has been given to the fact that the IF of medium wave broadcast receivers in the UK is usually either 465kHz or 470kHz? In the US the IF is more usually 450kHz or 455kHz. This being so, any operating particularly at the lower end of 472-487kHz is very likely to cause interference to AM broadcast reception. I recall when I took my Morse test at Portpatrick in 1954. Broadcast reception was repeatedly interrupted by GPK operating on 472kHz. Sorry it this has been covered before. I could have missed it. 73 de David G4DMP -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + --Motorola-A-Mail-iBEaPVd0z7ANwEFw Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: base64 PGh0bWw+PGhlYWQ+PHN0eWxlIHR5cGU9InRleHQvY3NzIj5ib2R5IHt3b3JkLXdyYXA6IGJyZWFr LXdvcmQ7IGJhY2tncm91bmQtY29sb3I6I2ZmZmZmZjt9PC9zdHlsZT48L2hlYWQ+PGJvZHk+PGRp diBzdHlsZT0iZm9udC1mYW1pbHk6IHNhbnMtc2VyaWY7IGZvbnQtc2l6ZTogMTZweCI+PGI+PGk+ RGF2aWQsPGJyPjwvaT48L2I+PGI+PGk+QSBnb29kIHJlY2VpdmVyIHdpbGwgaGF2ZSBzb21ldGhp bmcgdXB3YXJkcyBvZiZuYnNwOyA2MGRCJm5ic3A7IGkuZi4gcmVqZWN0aW9uLCBjb25zdW1lciBt b2RlbHMgc29tZXdoYXQgbGVzcy48YnI+PC9pPjwvYj48Yj48aT5UaGUgYm90dG9tIGxpbmUgaXMg dGhhdCBub2JvZHkgY2FyZXMgYWJvdXQgTVcgKGV4Y2VwdCBoYW1zISk8YnI+PC9pPjwvYj48Yj48 aT5UaGUgbWFydGltZSBncm91cCBpcyBsb2JieWluZyBnb3Zlcm5tZW50cyB0byBjcmVhdGUgbmV3 IGRpZ2l0YWwgZGF0YSBzZXJ2aWNlcyBhdCA1MDAsIGl0IHJlbWFpbnMgdG8gYmUgc2VlbiBpZiB0 aGV5IHdpbGwgZ2V0IHRoZWlyIHdpc2guIEluIHRoZSBtZWFudGltZSB0aGUgbWFyaXRpbWUgaW50 ZXJlc3RzIHdpbGwgZmlnaHQgbGlrZSBtYWQgdG8gaG9sZCBvbiB0byB0aGUgZnJlcXVlbmNpZXMg d2hldGhlciB0aGV5IHVzZSB0aGVtIG9yIG5vdCE8YnI+PC9pPjwvYj48Yj48aT43MyBXYXJyZW4g SzJPUlM8YnI+PC9pPjwvYj48Yj48aT48YnI+PC9pPjwvYj48Yj48aT48YnI+PC9pPjwvYj48Zm9u dCBmYWNlPSJzYW5zLXNlcmlmIj48c3BhbiBzdHlsZT0iZm9udC1zaXplOiAxNHB4Ij48aT48Zm9u dCBjb2xvcj0iIzMzMzMzMyI+U2VudCB2aWEgRFJPSUQgb24gVmVyaXpvbiBXaXJlbGVzczwvZm9u dD48L2k+PC9zcGFuPjwvZm9udD48L2Rpdj48YnI+PGJyPi0tLS0tT3JpZ2luYWwgbWVzc2FnZS0t LS0tPGJyPjxibG9ja3F1b3RlIHN0eWxlPSI7IGJvcmRlci1sZWZ0OiAycHggc29saWQgcmdiKDE2 LCAxNiwgMjU1KTsgbWFyZ2luLWxlZnQ6IDVweDsgcGFkZGluZy1sZWZ0OiA1cHg7Ij48ZGl2IHN0 eWxlPSJmb250LWZhbWlseTogc2Fucy1zZXJpZjsgZm9udC1zaXplOiAxNHB4Ij48Yj5Gcm9tOiA8 L2I+RGF2aWQgUHJhdHQgJmx0O2RhdmlkQGc0ZG1wLmZzbmV0LmNvLnVrJmd0OzxiPjxicj5Ubzog PC9iPnJzZ2JfbGZfZ3JvdXBAYmxhY2tzaGVlcC5vcmc8Yj48YnI+U2VudDogPC9iPldlZCwgTWFy IDIsIDIwMTEgMTE6MjA6MDcgR01UKzAwOjAwPGI+PGJyPlN1YmplY3Q6IDwvYj5MRjogV1JDLTIw MTIgcHJvcG9zYWwgZm9yICduZWFyJyA1MDBrSHogYmFuZChzKTxicj48YnI+PC9kaXY+SSB3YXMg c29tZXdoYXQgZGlzdHVyYmVkIGJ5IHRoZSBwaWVjZSBpbiBsYXN0IFN1bmRheSdzIEdCMlJTIG5l d3MgdGhhdDxicj5nYXZlIHByZWxpbWluYXJ5IGluZm9ybWF0aW9uIGFib3V0IHRoZSBwcm9wb3Nh bHMgdG8gV1JDLTIwMTIgZm9yIGFuPGJyPmFsbG9jYXRpb24gbmVhciB0byA1MDBrSHouPGJyPjxi cj5JdCBzdGF0ZXMgdGhhdCB0aGUgaW5pdGlhbCBwcm9wb3NhbCBmb3IgMTVrSHogYWxsb2NhdGVk IHdhcyBiZXR3ZWVuIDQxNTxicj50byA1MjYuNWtIei4gIER1ZSB0byBmdXR1cmUgbWFyaXRpbWUg dXNlLCB0aGUgUlNHQiBpcyBwcm9wb3Npbmc8YnI+NDcyLTQ4N2tIeiwgd2hpbGUgdGhlIFVTIHdp bGwgYmUgcHJvcG9zaW5nIHR3byBiYW5kcyB0b3RhbGx5IDE1a0h6LCB2aXo8YnI+NDYxLTQ2OSBh bmQgNDcxLTQ3OGtIei48YnI+PGJyPkkgd29uZGVyIHdoZXRoZXIgYW55IHRob3VnaHQgaGFzIGJl ZW4gZ2l2ZW4gdG8gdGhlIGZhY3QgdGhhdCB0aGUgSUYgb2Y8YnI+bWVkaXVtIHdhdmUgYnJvYWRj YXN0IHJlY2VpdmVycyBpbiB0aGUgVUsgaXMgdXN1YWxseSBlaXRoZXIgNDY1a0h6IG9yPGJyPjQ3 MGtIej8gIEluIHRoZSBVUyB0aGUgSUYgaXMgbW9yZSB1c3VhbGx5IDQ1MGtIeiBvciA0NTVrSHou PGJyPjxicj5UaGlzIGJlaW5nIHNvLCBhbnkgb3BlcmF0aW5nIHBhcnRpY3VsYXJseSBhdCB0aGUg bG93ZXIgZW5kIG9mIDQ3Mi00ODdrSHo8YnI+aXMgdmVyeSBsaWtlbHkgdG8gY2F1c2UgaW50ZXJm ZXJlbmNlIHRvIEFNIGJyb2FkY2FzdCByZWNlcHRpb24uPGJyPjxicj5JIHJlY2FsbCB3aGVuIEkg dG9vayBteSBNb3JzZSB0ZXN0IGF0IFBvcnRwYXRyaWNrIGluIDE5NTQuIEJyb2FkY2FzdDxicj5y ZWNlcHRpb24gd2FzIHJlcGVhdGVkbHkgaW50ZXJydXB0ZWQgYnkgR1BLIG9wZXJhdGluZyBvbiA0 NzJrSHouPGJyPjxicj5Tb3JyeSBpdCB0aGlzIGhhcyBiZWVuIGNvdmVyZWQgYmVmb3JlLiBJIGNv dWxkIGhhdmUgbWlzc2VkIGl0Ljxicj48YnI+NzMgZGUgRGF2aWQgRzRETVA8YnI+LS0gPGJyPiAr IC0gLSAtIC0gLSAtIC0gLSAtIC0gLSAtIC0gLSAtIC0gKzxicj4gfCBEYXZpZCBNIFByYXR0LCBL aXBwYXgsIExlZWRzLiAgIHw8YnI+IHwgV2Vic2l0ZTogPGEgaHJlZj0iaHR0cDovL3d3dy5nNGRt cC5jby51ayI+aHR0cDovL3d3dy5nNGRtcC5jby51azwvYT4gfDxicj4gKyAtIC0gLSAtIC0gLSAt IC0gLSAtIC0gLSAtIC0gLSAtICs8YnI+PGJyPjxicj48YnI+PGJyPjwvYmxvY2txdW90ZT48L2Jv ZHk+PC9odG1sPg0K --Motorola-A-Mail-iBEaPVd0z7ANwEFw--