Return-Path: Received: from rly-da01.mx.aol.com (rly-da01.mail.aol.com [172.19.129.75]) by air-da03.mail.aol.com (v126.13) with ESMTP id MAILINDA032-a504b4f096f35e; Thu, 14 Jan 2010 07:09:35 -0500 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-da01.mx.aol.com (v125.7) with ESMTP id MAILRELAYINDA018-a504b4f096f35e; Thu, 14 Jan 2010 07:09:21 -0500 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1NVOUp-0007hG-TP for rs_out_1@blacksheep.org; Thu, 14 Jan 2010 12:08:15 +0000 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1NVOUp-0007h7-EQ for rsgb_lf_group@blacksheep.org; Thu, 14 Jan 2010 12:08:15 +0000 Received: from mail-bw0-f221.google.com ([209.85.218.221]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1NVOUm-00008s-78 for rsgb_lf_group@blacksheep.org; Thu, 14 Jan 2010 12:08:15 +0000 Received: by bwz21 with SMTP id 21so16460424bwz.4 for ; Thu, 14 Jan 2010 04:08:04 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:content-type; bh=W1pMwu3YeFdSh/JwrsQ8B2sPPSL7dYIHQUIhEWY00uQ=; b=v5ovyfnwvPxx/UXXAfIo4BMmcrO9R0TF9+G0C9siRmDZkATiolZdmBE1+AzgS4mbKu vVLUvY865FkK62xWbpeOzmmlLaN6iHOz9nbumpZmwIz4lcKOJsgOiJrqbdp2sQ1EFSdX IdzNqnB3dqdZzRxhapF4YoJxV2Usj5bbrkSis= 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=PUH+WoWvgaOCzCYKxrrZokX0OmfA0ZYq6t3OAuUJoH35dCQ/qt5EhTBHzON1hwFZHl 8xH5+QefR08QkcyoRt8cCtr/pKt4ur+LONzbJfqcdMCnl0dNDHagyycF/AHP2VCFpQrM hC9vhBdizuMPgB/BX9ioaymfNiKT29Vmo0mRA= MIME-Version: 1.0 Received: by 10.204.154.213 with SMTP id p21mr370343bkw.163.1263470882264; Thu, 14 Jan 2010 04:08:02 -0800 (PST) In-Reply-To: <1f0624b91001140306k7eff5b4cn9ae73cb5cc6a37fc@mail.gmail.com> References: <1f0624b91001131347i18ff85bbxb5977cdcb3c438f5@mail.gmail.com> <20100113220536.23ff9c6e@opc1> <20100113232415.j3jn4brkyqs4gg0s@webmail6.kuleuven.be> <1f0624b91001140306k7eff5b4cn9ae73cb5cc6a37fc@mail.gmail.com> Date: Thu, 14 Jan 2010 12:08:01 +0000 Message-ID: <9afca2641001140408o9e58f8g36272480eb115958@mail.gmail.com> From: Roger Lapthorn To: rsgb_lf_group@blacksheep.org X-Karma: unknown: DomainKey-Status: good (testing) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,HTML_MESSAGE=0.001 Subject: Re: LF: 500khz WSPR drift Content-Type: multipart/alternative; boundary=0015175cd86e1f299e047d1ebd19 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-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: mail_rly_antispam_dkim-m242.2 ; domain : gmail.com DKIM : pass X-Mailer: Unknown (No Version) --0015175cd86e1f299e047d1ebd19 Content-Type: text/plain; charset=ISO-8859-1 My own QRP transverter goes from 28MHz down to 500kHz and this drifts about 40Hz before settling as the oscillator warms, so I have to be on-hand to adjust the dial setting in the first 30 minutes. I should leave the oscillator running all the time or have this on for 30 minutes before I start TXing. At 50MHz drift would be worse. Also, I'm not sure what ambient temperature LA3EQ has got, but I bet it is cold, so his drift might be even greater as his transverter (higher power than mine) warms up more over a larger temperature range. 73s Roger G3XBM 2010/1/14 Gary - G4WGT > Hi guys, > > Yes it was LA3EQ, started getting decodes as the drift flattened out. 50 > MHz to 500 kHz is a long way to transvert, I use 4 MHz & as far as I am > aware no drift problems after half an hour or so warm up. > > Thanks all the comments. > > Gary - G4WGT. > > 2010/1/13 James Moritz > > Dear LF Group, >> >> ...The perils of having a 50MHz -> 500kHz transverter! 3.5MHz would be a >> better IF frequency from the drift point of view. >> >> Cheers, Jim Moritz >> 73 de M0BMU >> >> ----- Original Message ----- From: "Rik Strobbe" < >> Rik.Strobbe@fys.kuleuven.be> >> To: >> Sent: Wednesday, January 13, 2010 10:24 PM >> Subject: Re: LF: 500khz WSPR drift >> >> >> >> over the past 12 hours I had 51 spots of LA3EQ, frequency ranging from >>> 503848 to 503885 >>> >>> 73, Rik >>> >> >> >> > -- http://g3xbm-qrp.blogspot.com/ http://www.g3xbm.co.uk http://www.youtube.com/user/G3XBM G3XBM GQRP 1678 ISWL G11088 --0015175cd86e1f299e047d1ebd19 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable My own QRP transverter goes from 28MHz down to 500kHz and this drifts abou= t 40Hz before settling as the oscillator warms, so I have to be on-hand to= adjust the dial setting in the first 30 minutes. I should leave the oscil= lator running all the time or have this on for 30 minutes before I start= TXing.

At 50MHz drift would be worse. Also, I'm not sure what ambient tem= perature LA3EQ has got, but I bet it is cold, so his drift might be even= greater as his transverter (higher power than mine) warms up more over a= larger temperature range.

73s
Roger G3XBM

2010/1/14 Gary -= G4WGT <g4wgt@= tiscali.co.uk>
Hi guys,

Yes it was LA3EQ, =A0started getting decodes= as the drift flattened out. 50 MHz to 500 kHz is a long way to transvert,= I use 4 MHz & as far as I am aware no drift problems after half an ho= ur or so warm up.

Thanks all the comments.

Gary= - G4WGT.

2010/1/13 James Moritz <james.moritz@btopenworld.com>

Dear LF Group,<= br>
...The perils of having a 50MHz -> 500kHz transverter! 3.5MHz would be= a better IF frequency from the drift point of view.

Cheers, Jim Moritz
73 de M0BMU

----- Original Message ----- From: "Rik Strobbe" <Rik.Strobbe@fys.kule= uven.be>
To: <= rsgb_lf_group@blacksheep.org>
Sent: Wednesday, January 13, 2010 10:24 PM
Subject: Re: LF: 500khz WSPR drift



over the past 12 hours I had 51 spots of LA3EQ, frequency ranging from 503= 848 to 503885

73, Rik






--

http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/G3XBM
G3XBM =A0 =A0GQRP 1678 =A0 =A0 =A0ISWL G11088
--0015175cd86e1f299e047d1ebd19--