Return-Path: X-Spam-DCC: paranoid 1233; Body=2 Fuz1=2 Fuz2=2 X-Spam-Checker-Version: SpamAssassin 3.1.3 (2006-06-01) on lipkowski.org X-Spam-Level: X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00 autolearn=unavailable version=3.1.3 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by paranoid.lipkowski.org (8.13.7/8.13.7) with ESMTP id sBMG8nmW006571 for ; Mon, 22 Dec 2014 17:08:52 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Y35Qu-0000VF-Oe for rs_out_1@blacksheep.org; Mon, 22 Dec 2014 16:02:08 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Y35Qu-0000V6-F5 for rsgb_lf_group@blacksheep.org; Mon, 22 Dec 2014 16:02:08 +0000 Received: from out1.ip03ir2.opaltelecom.net ([62.24.128.239]) by relay1.thorcom.net with esmtp (Exim 4.84) (envelope-from ) id 1Y35Qs-0006rP-Ty for rsgb_lf_group@blacksheep.org; Mon, 22 Dec 2014 16:02:07 +0000 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AswnAEVAmFRcH42sPGdsb2JhbABbgwaBKoMEgyqyLpNVBAICgRgXAQEBAQEBBQEBAQE4IBuEDAEBAQECAQgbFR4oBgEEBQMDEQQBAQMCJgICOQoMCAYTCAmIEwy6H5YDAQEBAQYBAQEBAQEcgSGNeQpVBhCCUi6BEwEEjhFMiTOKL4JWgzmCL4FhPjGBAwaBOgEBAQ X-IPAS-Result: AswnAEVAmFRcH42sPGdsb2JhbABbgwaBKoMEgyqyLpNVBAICgRgXAQEBAQEBBQEBAQE4IBuEDAEBAQECAQgbFR4oBgEEBQMDEQQBAQMCJgICOQoMCAYTCAmIEwy6H5YDAQEBAQYBAQEBAQEcgSGNeQpVBhCCUi6BEwEEjhFMiTOKL4JWgzmCL4FhPjGBAwaBOgEBAQ X-IronPort-AV: E=Sophos;i="5.07,624,1413241200"; d="scan'208";a="537915795" Received: from host-92-31-141-172.as13285.net (HELO malPC) ([92.31.141.172]) by out1.ip03ir2.opaltelecom.net with SMTP; 22 Dec 2014 16:02:03 +0000 Message-ID: From: "mal hamilton" To: References: <00b601d01d18$87884620$9698d260$@nifty.com> In-Reply-To: Date: Mon, 22 Dec 2014 16:01:41 -0000 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal Importance: Normal X-Mailer: Microsoft Windows Live Mail 15.4.3555.308 X-MimeOLE: Produced By Microsoft MimeOLE V15.4.3555.308 X-Scan-Signature: fc152e7304849b9a177649b85aea9f41 Subject: LF: Re: Japan on 475 kHz. Content-Type: text/plain; format=flowed; charset="UTF-8"; reply-type=original Content-Transfer-Encoding: 7bit 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-Scanned-By: MIMEDefang 2.56 on 10.1.3.10 Status: O X-Status: X-Keywords: X-UID: 1570 Hi all Over the years I have worked many JA stns on 160 metres CW and look forward to doing the same on 630 metres Propagation on both MF BANDS similar de MAL/G3KEV -----Original Message----- From: Dimitrios Tsifakis Sent: Sunday, December 21, 2014 11:57 PM To: rsgb_lf_group@blacksheep.org Subject: Re: LF: RE: Japan on 475 kHz. Hi Hideho san, Thank you for the update. I am glad to hear that even though you have all these tough restrictions, Japanese amateurs are planning portable operations in the new band! > I would like to know the situations in the already operating stations. > Do you have any BC QRM problem ? (I mean making interference, not > receiving), > and what care do you take ? I have not heard of any complains about interference to the MW BC service because of operation on 630m here in Australia. We are allowed 5 W EIRP and operators do transmit at that level. My guess is that the lack of interference complains is partly because of the generally good practice on behalf of the few amateurs that are making use of the band and partly because of limited audience of the MW BC stations. > LPF, what kind, other means ? > How much is your harmonic attenuation ? or filter attenuation ? > Information highly appreciated, I use a low pass filter which ensures that the harmonics are -50 dBc or lower. I think the tuned antenna also helps with not radiating too much harmonics power. 73, Dimitris VK1SV