Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mg01.r1000.mx.aol.com (Internet Inbound) with ESMTP id 2D3DF3800009B; Fri, 30 Mar 2012 11:37:15 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SDdKU-0005U2-DH for rs_out_1@blacksheep.org; Fri, 30 Mar 2012 16:01:30 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SDdKU-0005Tr-1d for rsgb_lf_group@blacksheep.org; Fri, 30 Mar 2012 16:01:30 +0100 Received: from smtp-vbr5.xs4all.nl ([194.109.24.25]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SDdKS-00010m-MV for rsgb_lf_group@blacksheep.org; Fri, 30 Mar 2012 16:01:30 +0100 Received: from pc-roelof (ndb.demon.nl [82.161.81.65]) by smtp-vbr5.xs4all.nl (8.13.8/8.13.8) with ESMTP id q2UF1MdM016398 for ; Fri, 30 Mar 2012 17:01:27 +0200 (CEST) (envelope-from roelof@ndb.demon.nl) To: rsgb_lf_group@blacksheep.org References: <8CEDBB08CDC93E9-6B0-1108@webmail-m065.sysops.aol.com> <4F74A485.8010904@freenet.de> <4F7546E0.3080900@telia.com> <008c01cd0e72$23c9a2d0$1502a8c0@Clemens04> Date: Fri, 30 Mar 2012 17:01:10 +0200 MIME-Version: 1.0 From: "Roelof Bakker" Message-ID: In-Reply-To: <008c01cd0e72$23c9a2d0$1502a8c0@Clemens04> User-Agent: Opera Mail/11.62 (Win32) X-Virus-Scanned: by XS4ALL Virus Scanner X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=iso-8859-15; format=flowed; delsp=yes Subject: Re: LF: Re: RTZ on 50 kHz Content-Transfer-Encoding: 7bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none 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: 0:2:476196992:93952408 x-aol-sid: 3039ac1d60c94f75d32a27ce X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Hello Clemens, Thank you for the links. You have excellent reception of JJY-60. Besides the length of the pulses, there is yet another way to identify WWVB. The carrier is not completely switched off between pulses, but rather the power level is reduced by 17 dB. This is a reduction from 70 KW to 1.4 KW. The signal strength of WWVB is peaking around 05:15 UTC and at that time, I can see the reduced carrier. As WWVB is the only station that uses this power reduction between pulses, it must be WWVB what I am hearing. Last Monday WWVB was audible the better part of the morning and faded out half an hour before local noon. 73, Roelof, pa0rdt