Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-mp02.r1000.mx.aol.com (Internet Inbound) with ESMTP id 4380D380000B5; Sun, 17 Jul 2011 04:25:27 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1QiMeJ-0001yt-Te for rs_out_1@blacksheep.org; Sun, 17 Jul 2011 09:24:27 +0100 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1QiMeJ-0001yk-Ed for rsgb_lf_group@blacksheep.org; Sun, 17 Jul 2011 09:24:27 +0100 Received: from mail-pv0-f171.google.com ([74.125.83.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1QiMeG-0000Rl-SX for rsgb_lf_group@blacksheep.org; Sun, 17 Jul 2011 09:24:27 +0100 Received: by pva4 with SMTP id 4so3315307pva.16 for ; Sun, 17 Jul 2011 01:24:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; bh=cL2Yyk0StjFk8KI8ZI958+hgdKqaE+8+h+I0KUtvKqs=; b=UieCPBgLOKHg79+RRLSY4NT91++oABRPWCa676YbwgZFjgUT5mexMI1+PsIntv71LN Z3Fvi4ZYxO2kAZOwU650TJ7ztmpEK0hA3grsX1slEAqvkzmBP0kXb0z3axeP6bshXM4v Id07DMYq6gkhlwbyiaevjySuWYY6eWeM0TdGk= MIME-Version: 1.0 Received: by 10.142.79.12 with SMTP id c12mr2601056wfb.443.1310891057657; Sun, 17 Jul 2011 01:24:17 -0700 (PDT) Received: by 10.142.180.13 with HTTP; Sun, 17 Jul 2011 01:24:17 -0700 (PDT) In-Reply-To: References: Date: Sun, 17 Jul 2011 09:24:17 +0100 Message-ID: From: Roger Lapthorn To: sub9khz@yahoogroups.com, rsgb_lf_group@blacksheep.org X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: VLF transmit test from East Cambridgeshire - Sunday July 17th Content-Type: multipart/alternative; boundary=001636e0b39cd4b8fa04a83f9bf2 X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.6 required=5.0 tests=HTML_20_30, HTML_FONTCOLOR_UNSAFE,HTML_MESSAGE 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: 0:2:420453728:93952408 X-AOL-SCOLL-URL_COUNT: 0 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m217.2 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1dc1464e229c777b31 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none --001636e0b39cd4b8fa04a83f9bf2 Content-Type: text/plain; charset=ISO-8859-1 My continuous carrier earth-mode transmission on *8.7605kHz* (checked with SL) started at 0803z. There will be periodic breaks in transmission to aid ID. Later this morning I'll be out in the fens trying to find the limit of range with the current RX equipment and TX power. 73s Roger G3XBM On 16 July 2011 12:39, Roger Lapthorn wrote: > Dear All, > > On Sunday July 17th from 0800z-1600z (0900-1700BST) I will be transmitting > a *very long continuous carrier close to 8.7608kHz* which I will, at some > point, turn off during the test period to help ID. The TX will be my 5W > earth mode set-up with 20m spaced electrodes with elevated feed to the far > electrode. > > If any stations with suitable equipment in the East Cambs area could look > for me (with frequency locked, very narrow, Spectrum Lab settings) I'd > appreciate it. The purpose of the test to see if any residual VLF signal is > detectable beyond the usual earth-mode coverage area. Ideally I need > stations in the 5-20km range from my QTH in Burwell, Cambs. > > With earth-mode and QRSS3 the best I've achieved is just under 6km. It > would be wonderful to find the signal was (just) detectable at a somewhat > greater range using a very long carrier and suitable SpecLab RX settings. At > some point later in the year I shall be increasing the VLF TX power to > 100-200W which will improve chances of more distant reception. > > 73s > Roger G3XBM > > -- > http://g3xbm-qrp.blogspot.com/ > http://www.g3xbm.co.uk > http://www.youtube.com/user/g3xbm > https://sites.google.com/site/sub9khz/ > > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/g3xbm https://sites.google.com/site/sub9khz/ --001636e0b39cd4b8fa04a83f9bf2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable My continuous carrier earth-mode transmission on 8.7605kHz (checked = with SL) started at 0803z. There will be periodic breaks in transmission to= aid ID. Later this morning I'll be out in the fens trying to find the = limit of range with the current RX equipment and TX power.

73s
Roger G3XBM


On 16 July 201= 1 12:39, Roger Lapthorn <rogerlapthorn@gmail.com> wrote:
Dear All,

On Sunday July 17th from 0800z-1600z (0900-1700BST) I will= be transmitting a very long=20 continuous carrier close to 8.7608kHz which I will, at some point, = turn off during the test period to help ID. The TX will be my 5W earth mode= set-up with 20m spaced electrodes with elevated feed to the far electrode.=

If any stations with suitable equipment in the East Cambs area could lo= ok for me (with frequency locked, very narrow, Spectrum Lab settings) I'= ;d appreciate it. The purpose of the test to see if any residual VLF signal= is detectable beyond the usual earth-mode coverage area. Ideally I need st= ations in the 5-20km range from my QTH in Burwell, Cambs.

With earth-mode and QRSS3 the best I've achieved is just under 6km.= It would be wonderful to find the signal was (just) detectable at a somewh= at greater range using a very long carrier and suitable SpecLab RX settings= . At some point later in the year I shall be increasing the VLF TX power to= 100-200W which will improve chances of more distant reception.

73s
Roger G3XBM

--
= http://g3xbm-q= rp.blogspot.com/
http://www.g3xbm.co.uk
http://www.= youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/




--
http://g3xbm-qrp.blogspot.com/=
http://www.g3x= bm.co.uk
http://www.= youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/

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