Return-Path: Received: (qmail 10855 invoked from network); 26 Dec 1999 16:26:28 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 26 Dec 1999 16:26:28 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 122Gs7-0005Ax-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 26 Dec 1999 16:50:19 +0000 Received: from imo-d03.mx.aol.com ([205.188.157.35]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 122Gs6-0005AV-00 for rsgb_lf_group@blacksheep.org; Sun, 26 Dec 1999 16:50:18 +0000 X-Priority: 3 X-MSMail-Priority: Normal Received: from WarmSpgs@aol.com by imo-d03.mx.aol.com (mail_out_v24.6.) id l.0.4fdcf616 (3968) for ; Sun, 26 Dec 1999 11:17:24 -0500 (EST) From: WarmSpgs@aol.com X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Message-ID: <0.4fdcf616.25979994@aol.com> Date: Sun, 26 Dec 1999 11:17:24 EST Subject: Re: LF: Below 9 kHz To: rsgb_lf_group@blacksheep.org MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit X-Mailer: AOL 4.0 for Windows 95 sub 228 Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: Magne raises a good point. One needs to consult the regulations in one's home country. Over here, frequencies below 9 kHz are not regulated, but the ITU requirement is interpreted to mean harmonic energy appearing on frequencies above 9 kHz must be kept below field strength levels specified in other parts of our FCC's rules. This makes the sub-9 kHz region ideal here for earth dipole experiments, and even conventional antennas, but only if one takes adequate harmonic suppression measures. 73, John