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 sBM03Vkt005020 for ; Mon, 22 Dec 2014 01:03:31 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1Y2qNf-0006zB-OA for rs_out_1@blacksheep.org; Sun, 21 Dec 2014 23:57:47 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1Y2qNf-0006z2-Bq for rsgb_lf_group@blacksheep.org; Sun, 21 Dec 2014 23:57:47 +0000 Received: from mail-la0-f42.google.com ([209.85.215.42]) by relay1.thorcom.net with esmtps (TLSv1:DHE-RSA-AES256-SHA:256) (Exim 4.84) (envelope-from ) id 1Y2qNd-00048F-Pg for rsgb_lf_group@blacksheep.org; Sun, 21 Dec 2014 23:57:46 +0000 Received: by mail-la0-f42.google.com with SMTP id gd6so3258248lab.29 for ; Sun, 21 Dec 2014 15:57:44 -0800 (PST) X-DKIM-Result: Domain=gmail.com Result=Good and Known Domain DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=L8LRIRaa+i+DGSg5j8YN2B2wacCEXR54UB65Lkicfys=; b=s7YKntAxXYs3ysM9OMYUgWt/FjmqhvLe+rMQqqEAJABYgtimbBVO4l+idGAhBfBgwD cp3mo1TxhZhgbeGpmclUy4cQN+rTDzYSKQLNdfTwI0eVn5YOLe4TqiQH9MtEl8RVH3nU 628Y2URkfuEUui7t3sIBFkoYbYsmbsYOr7KtAHFkY7VBN5uKUputsQrElZ58jGEKnlKM yWKzJbp+HQKoiEj93Jmd8/HwnSDK1RX29Mw+dTR/TzyFbVw8FpktRu+7DsM+bM3vw0HA XiSSWXT/VYtbHABTrTLNeghB4isntCy3yrXTjvXE0WxlK13JFQkzdpGMGjAnl8ODXTbb YynA== MIME-Version: 1.0 X-Received: by 10.112.198.233 with SMTP id jf9mr19629474lbc.9.1419206264619; Sun, 21 Dec 2014 15:57:44 -0800 (PST) Received: by 10.25.149.147 with HTTP; Sun, 21 Dec 2014 15:57:44 -0800 (PST) In-Reply-To: <00b601d01d18$87884620$9698d260$@nifty.com> References: <00b601d01d18$87884620$9698d260$@nifty.com> Date: Mon, 22 Dec 2014 10:57:44 +1100 Message-ID: From: Dimitrios Tsifakis To: rsgb_lf_group@blacksheep.org X-Scan-Signature: c1f72e5acb1277e013f90c915ad7ad68 Subject: Re: LF: RE: Japan on 475 kHz. Content-Type: text/plain; charset=UTF-8 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: 1564 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