Return-Path: Received: from mtain-di05.r1000.mx.aol.com (mtain-di05.r1000.mx.aol.com [172.29.64.9]) by air-di06.mail.aol.com (v129.4) with ESMTP id MAILINDI062-eacb4d1da6015; Fri, 31 Dec 2010 04:44:33 -0500 Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-di05.r1000.mx.aol.com (Internet Inbound) with ESMTP id EBF2738000082; Fri, 31 Dec 2010 04:44:31 -0500 (EST) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1PYbWa-0006co-29 for rs_out_1@blacksheep.org; Fri, 31 Dec 2010 09:43:52 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1PYbWZ-0006cf-JB for rsgb_lf_group@blacksheep.org; Fri, 31 Dec 2010 09:43:51 +0000 Received: from mail-iy0-f171.google.com ([209.85.210.171]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1PYbWX-0004kD-EC for rsgb_lf_group@blacksheep.org; Fri, 31 Dec 2010 09:43:51 +0000 Received: by iyj21 with SMTP id 21so10478167iyj.16 for ; Fri, 31 Dec 2010 01:43:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=4UxfzBbup7BVC4qW+6Rl9HWM41wa4OXROpgUFuZoNmM=; b=YsjU1jcpyE3dRHItxEcdzULY7KIvowyVzBCAIQKl0hEMwTc7F/bjta1q9DlIIdsNWB j4Zrr+Au42dcP8BYlPU8t2euXSlaW9wRYLFQ2YOGIvoipH6kJvGYIpZhETF1e35djpEi 2c5qwRWBvDgKst9zYI5qH7ShW8+mGVuN0ECns= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=kssa301C6KMQcwe23MuJ+/HhqFWYLFnSwBqdWisB1vvDhlN7IAQHfDFLlz45Zdl6wh BKy7G4YdkS10k1gxDC7/z0t6RuO5Jy9Pyi1oaUujbTDC6HiBCyvMbgHpfmVcphsSGmbw rJrXM7lWBM+0mWPHyynGV4ghCeX8xWQFUW/8U= MIME-Version: 1.0 Received: by 10.231.207.84 with SMTP id fx20mr17068219ibb.62.1293788621782; Fri, 31 Dec 2010 01:43:41 -0800 (PST) Received: by 10.231.200.211 with HTTP; Fri, 31 Dec 2010 01:43:41 -0800 (PST) In-Reply-To: References: <15858.38665.qm@web28513.mail.ukl.yahoo.com> Date: Fri, 31 Dec 2010 09:43:41 +0000 Message-ID: From: Andy Talbot To: rsgb_lf_group@blacksheep.org DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: VLF - G3XIZ transmitting today Content-Type: multipart/alternative; boundary=90e6ba4fc514375a020498b1a3bf X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.5 required=5.0 tests=HTML_20_30,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-AUTHENTICATION: mail_rly_antispam_dkim-m286.1 ; domain : gmail.com DKIM : pass x-aol-sid: 3039ac1d40094d1da5ff569e X-AOL-IP: 195.171.43.25 X-Mailer: Unknown (No Version) --90e6ba4fc514375a020498b1a3bf Content-Type: text/plain; charset=ISO-8859-1 Thinking about that - Its exactly what I did with my first 73khz SLOWCW Tx prog back in 1997. SLOWCW was generated, and a part of the 'mark' signal consisted of the callsign being sent at normal CW speeds for identification. G3PLX could see this fast CW on his received warerfall as a definte reduction in carrier power. On 31 December 2010 09:39, Andy Talbot wrote: > SDR-IQ is running, with a 20Hz wide waterfall looking in 0.03Hz FFT bin > size. > It took 5 minutes for a calibration signal to show up on the screen. > The paint is drying - slowly :-)0 > > If you want to send QRSS identifier at high speeds (relative) , suggest you > repeat at 10 or 15 minute *regular* intervals. They will then show up up > as periodic reductions in carrier level of about 3dB or so. > > If fact, tht just may be a suitable task for a new bit of software or a > PIC - a mixed QRSSSSSS generator > > > Andy > www.g4jnt.com > > > > On 31 December 2010 08:44, Chris Osborn wrote: > >> LF, >> >> I shall be transmitting VLF today starting at 09.00 Z >> >> Freq: 8.971 855 kHz (nominal but close) >> Mode : Continuous carrier with occasional QRSS identifier >> Aerial: Initially: 40m inverted 'L' at 10m >> Later: balloon supported aerial at 50m >> >> Hopefully the system will keep going as the loading coil re-wind >> seems to have done the trick now that the varnish has dried. >> >> 73 >> Chris >> G3XIZ >> >> > --90e6ba4fc514375a020498b1a3bf Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Thinking about that -
Its exactly what=A0I did with my first 73khz SLOWCW Tx=A0 prog back= in 1997.=A0=A0 SLOWCW was generated, and a part of the 'mark' sig= nal consisted of the callsign being sent at normal CW speeds for identific= ation.=A0=A0 G3PLX could see this fast CW on his received warerfall as a= definte reduction in carrier power.

=A0
On 31 December 2010 09:39, Andy Talbot <andy.g4jnt@gmail.com= > wrote:
SDR-IQ is running, with a 20Hz wide waterfall looking in 0.03Hz FFT= bin size.
It took 5 minutes for=A0a calibration signal to show up on the screen= .
The paint is drying - slowly :-)0
=A0
If you want to send QRSS identifier at high speeds (relative) , sugge= st you repeat at 10 or 15 minute regular intervals.=A0 They will th= en show up up as periodic reductions in carrier level of about 3dB or so.<= /div>
=A0
If fact, tht just may be a suitable task for a new bit of software or= a PIC=A0- a mixed QRSSSSSS generator
=A0
=A0
Andy


=A0
On 31 December 2010 08:44, Chris Osborn <g3= xiz@yahoo.co.uk> wrote:
LF,

I shall be transmitting VLF today starting at 09.00 Z
<= br>Freq:=A0=A0=A0 8.971 855 kHz (nominal but close)
Mode : Continuous= carrier with occasional QRSS identifier
Aerial:=A0 Initially:=A0 40m= inverted 'L' at 10m=A0
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 Later:=A0=A0=A0=A0 balloon supported aerial= at 50m

Hopefully the system will keep going as the loading coil re= -wind
seems to have done the trick now that the varnish has dried.
=
73
Chris
G3XIZ



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