Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dc01.r1000.mx.aol.com (Internet Inbound) with ESMTP id D42E33800009A; Wed, 21 Mar 2012 04:37:48 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1SAH1y-0000N3-NM for rs_out_1@blacksheep.org; Wed, 21 Mar 2012 08:36:30 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1SAH1y-0000Mu-75 for rsgb_lf_group@blacksheep.org; Wed, 21 Mar 2012 08:36:30 +0000 Received: from filter02.i-online.fr ([195.200.78.9]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1SAH1x-0001hC-Iy for rsgb_lf_group@blacksheep.org; Wed, 21 Mar 2012 08:36:30 +0000 Received: from smtp.qtxt.dns-iol.com ([195.200.78.13]) by filter02.i-online.fr (IceWarp 10.2.2) with ESMTP (SSL) id FLF99206 for ; Wed, 21 Mar 2012 09:36:06 +0100 Received: (qmail 27601 invoked by uid 507); 21 Mar 2012 09:36:20 +0100 Received: from unknown (HELO ?192.168.1.101?) (john.rabson@numeo.fr@217.67.155.178) by smtp.qtxt.dns-iol.com with SMTP; 21 Mar 2012 09:36:20 +0100 Mime-Version: 1.0 (Apple Message framework v1257) From: John Rabson In-Reply-To: Date: Wed, 21 Mar 2012 09:36:32 +0100 Message-Id: <8F306C5B-D1ED-41DD-8CAC-EA3CE878442D@numeo.fr> References: To: rsgb_lf_group@blacksheep.org X-Mailer: Apple Mail (2.1257) X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=disabled,none Content-Type: text/plain; charset=us-ascii Subject: Re: LF: Si570 oscillator Content-Transfer-Encoding: quoted-printable 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: 0:2:505653472:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1d40814f69935b0592 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Thank you everyone for your comments and suggestions. I think my best course of action at the moment is to use a QRP2000 as it = stands and see if it is sufficiently stable for my purposes. Regarding a GPS-disciplined oscillator, I think probably the best = approach will be to construct one at (say) 10 MHz. This can then be used = for several purposes, including calibrating my frequency counters. John F5VLF On 19 Mar 2012, at 19:02CET, John Rabson wrote: > LF, >=20 > I have been wondering about putting the device in a = temperature-controlled enclosure and wonder if there's anything to be = gained. What is the frequency-determining element? If it is a quartz = crystal or similar, what is the temperature at which the frequency = dependence is a minimum? >=20 > Does this temperature fall within the permitted range of operation for = this device? >=20 > Alternatively, could one realistically impose GPS discipline on a unit = using this device (such as a QRP2000)? >=20 > John F5VLF >=20